CN107241811A - Scheduling device, method and base station for communication system - Google Patents

Abstract

The embodiment of the invention provides a scheduling device, a scheduling method and a base station for a communication system, under the condition of enhancing system performance, the original uplink user equipment is scheduled, and simultaneously the user equipment with downlink transmission requirements is scheduled, or the original downlink user equipment is scheduled, and simultaneously the user equipment with uplink transmission requirements is scheduled, so that the interference on the original uplink transmission point and the original uplink user equipment or the interference received by the original downlink transmission point and the original downlink user equipment can be reduced, and the user equipment with downlink transmission requirements or the user equipment with uplink transmission requirements can be ensured to carry out normal downlink transmission or uplink transmission.

Description

Scheduling device, method and base station for communication system

technical field

The present invention relates to the technical field of communications, in particular to a scheduling device, method and base station for a communications system.

Background technique

In the research on the Time Division Duplex (TDD, Time Division Duplex) system of Long Term Evolution (LTE, Long Term Evolution) in the 3rd Generation Partnership Project (3GPP, ^3rd Generation Partnership Project), the enhanced interference management and traffic autonomy Adaptation (eIMTA, enhanced Interference Mitigation and TrafficAdaption) as an adaptive technology is used to break the fixed TDD frame structure configuration and flexibly change the uplink and downlink configuration.

However, changing the TDD frame structure configuration of a cell will have an impact on adjacent cells. For example, two adjacent cells adopt opposite uplink and downlink configurations. Instead of equipment-to-base station interference, base station-to-base station interference and user equipment-to-user equipment interference appear.

Usually, due to the relatively high erection of the base station, there are mostly direct transmission paths between the base stations, and the attenuation is small, which increases the interference between the base stations to a certain extent. In the research of eIMTA, in order to reduce interference, many restrictions are imposed on the uplink and downlink reconfiguration of each cell; Uplink and downlink reconfiguration etc. are allowed on individual subframes.

However, in the fifth generation (5G) mobile communication system in the future, the communication scenarios will be more diversified, the network architecture will become more and more flexible, and the requirements for the ratio of uplink and downlink services will become more and more flexible. In this case, many restrictions set in eIMTA will not be able to meet future business needs.

Therefore, 5G will require a more flexible duplex mode: that is, in the case of taking into account system interference, each cell can choose uplink and downlink configurations according to the business conditions of its users. Taking a heterogeneous network as an example, under the coverage of a macro base station (eg MTP), multiple transmission points (TP, Transmission Point) can simultaneously support uplink and downlink transmission services. For example, a macro base station (MTP) performs downlink communication; a small base station (such as an STP) within its coverage can perform both downlink communication and uplink communication, which is related to the service requirements of users within the coverage area of the STP.

Conversely, the MTP can also perform uplink communication; and the STP within the coverage of the MTP can both perform downlink communication and uplink communication; this flexible transmission mode can realize flexible uplink and downlink service transmission.

It should be noted that the above introduction of the technical background is only for the convenience of a clear and complete description of the technical solution of the present invention, and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are known to those skilled in the art just because these solutions are described in the background of the present invention.

Contents of the invention

The inventors of the present invention have found that, unlike multi-point transmission, in flexible uplink and downlink scheduling, not only base stations with closer distances can jointly perform transmission, but also multiple base stations with far distances (even multiple base stations without X2 interface connection with each other) can May be scheduled for flexible uplink and downlink transmissions at the same time. Therefore, it is necessary to consider the influence of the interference between base stations and the interference between user equipments and user equipments on system performance in the original scheduling mode.

Embodiments of the present invention provide a scheduling device, method, and base station for a communication system. In the case of enhanced system performance, user equipment with downlink transmission requirements can be scheduled while scheduling original uplink user equipment, or when scheduling original Simultaneous scheduling of downlink user equipment for user equipment with uplink transmission requirements can reduce the interference to the original uplink transmission point and uplink user equipment or reduce the interference received by the original downlink transmission point and downlink user equipment, and ensure that the user equipment with downlink transmission The required user equipment or the user equipment having an uplink transmission requirement performs normal downlink transmission or uplink transmission.

According to the first aspect of the embodiments of the present invention, there is provided a scheduling device for a communication system, the device includes: a first scheduling unit, the scheduling unit is used to schedule a subframe when the current subframe is an uplink subframe Uplink user equipment; when the current subframe is a downlink subframe, schedule the downlink user equipment; a selection unit, the selection unit is used to select the uplink subframe when the current subframe is an uplink subframe A downlink transmission point for user equipment with downlink transmission requirements in the frame to perform downlink transmission; if the current subframe is a downlink subframe, select a point for performing uplink transmission on the user equipment with uplink transmission requirements in the downlink subframe An uplink transmission point; a second scheduling unit, the second scheduling unit is configured to schedule the user equipment with downlink transmission requirements while scheduling the uplink user equipment to perform downlink transmission through the selected downlink transmission point. When the performance of the communication system is enhanced, scheduling the user equipment with downlink transmission requirements to perform downlink transmission through the selected downlink transmission point; scheduling the user equipment with uplink transmission requirements while scheduling the downlink user equipment When the performance of the communication system is enhanced when performing uplink transmission through the selected uplink transmission point, schedule the user equipment having uplink transmission requirements to perform uplink transmission through the selected uplink transmission point.

According to a second aspect of the embodiments of the present invention, there is provided a base station, including: the device according to the first aspect of the embodiments of the present invention.

According to a third aspect of the embodiments of the present invention, there is provided a scheduling method for a communication system, the method comprising: when the current subframe is an uplink subframe, scheduling uplink user equipment; when the current subframe is a downlink subframe In the case of a frame, schedule the downlink user equipment; when the current subframe is an uplink subframe, select a downlink transmission point for downlink transmission of the user equipment with downlink transmission requirements in the uplink subframe; in the current subframe When the frame is a downlink subframe, selecting an uplink transmission point for performing uplink transmission on a user equipment having an uplink transmission requirement in the downlink subframe; scheduling the user equipment having a downlink transmission requirement while scheduling the uplink user equipment When the performance of the communication system is enhanced when the user equipment performs downlink transmission through the selected downlink transmission point, schedule the user equipment with downlink transmission requirements to perform downlink transmission through the selected downlink transmission point; Scheduling the user equipment with uplink transmission requirements while simultaneously scheduling the user equipment with uplink transmission requirements when the performance of the communication system is enhanced through the selected uplink transmission point, scheduling the user equipment with uplink transmission requirements Uplink transmission is performed through the selected uplink transmission point.

The beneficial effects of the present invention are: in the case of enhanced system performance, the user equipment with downlink transmission requirements is scheduled while the original uplink user equipment is scheduled, or the user with uplink transmission requirements is scheduled while the original downlink user equipment is scheduled equipment, which can reduce the interference to the original uplink transmission point and uplink user equipment or reduce the interference received by the original downlink transmission point and downlink user equipment, and ensure that the user equipment with downlink transmission requirements or the user equipment with uplink transmission requirements Perform normal downlink or uplink transmission.

With reference to the following description and accompanying drawings, there are disclosed in detail specific embodiments of the invention, indicating the manner in which the principles of the invention may be employed. It should be understood that embodiments of the invention are not limited thereby in scope. Embodiments of the invention encompass many changes, modifications and equivalents within the spirit and scope of the appended claims.

Features described and/or illustrated with respect to one embodiment can be used in the same or similar manner in one or more other embodiments, in combination with, or instead of features in other embodiments .

It should be emphasized that the term "comprising/comprising" when used herein refers to the presence of a feature, integer, step or component, but does not exclude the presence or addition of one or more other features, integers, steps or components.

Description of drawings

The included drawings are used to provide further understanding of the embodiments of the present invention, and constitute a part of the specification, are used to illustrate the implementation mode of the present invention, and together with the text description, explain the principle of the present invention. Apparently, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings according to these drawings without any creative effort. In the attached picture:

FIG. 1 is a schematic diagram of a scheduling method for a communication system according to Embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of an application scenario of Embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of a method for selecting a downlink transmission point according to Embodiment 1 of the present invention;

4 is a schematic diagram of an uplink transmission point selection method according to Embodiment 1 of the present invention;

FIG. 5 is a schematic diagram of a user equipment to user equipment interference estimation method according to Embodiment 1 of the present invention;

FIG. 6 is a schematic diagram of a scheduling method for a communication system according to Embodiment 2 of the present invention;

FIG. 7 is a schematic diagram of a scheduling method for a communication system according to Embodiment 3 of the present invention;

FIG. 8 is a schematic diagram of a scheduling device for a communication system according to Embodiment 4 of the present invention;

FIG. 9 is a schematic diagram of a selection unit in Embodiment 4 of the present invention;

FIG. 10 is a schematic diagram of a first estimation unit according to Embodiment 4 of the present invention;

FIG. 11 is a schematic structural diagram of a base station according to Embodiment 5 of the present invention.

detailed description

The foregoing and other features of the invention will become apparent from the following description, taken with reference to the accompanying drawings. In the specification and drawings, specific embodiments of the invention are disclosed, which illustrate some embodiments in which the principles of the invention may be employed. It is to be understood that the invention is not limited to the described embodiments, but rather, the invention The invention includes all modifications, variations and equivalents that come within the scope of the appended claims.

In the embodiments of the present invention, a base station may be called an access point, a broadcast transmitter, a Node B, an evolved Node B (eNB), etc., and may include some or all of their functions. The term "base station" will be used herein. Each base station provides communication coverage for a specific geographic area. The term "cell" can refer to a base station and/or its coverage area depending on the context in which the term is used.

In the embodiment of the present invention, the mobile station or device may be called "User Equipment" (UE, User Equipment). A UE may be fixed or mobile and may also be called a mobile station, terminal, access terminal, subscriber unit, station, and so on. A UE may be a cellular telephone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless telephone, and the like.

Example 1

An embodiment of the present invention provides a scheduling method for a communication system, which is applied to a base station. FIG. 1 is a schematic diagram of a scheduling method used in a communication system according to Embodiment 1 of the present invention, which is described from a base station side. As shown in Figure 1, the method includes:

Step 101: when the current subframe is an uplink subframe, schedule uplink user equipment; when the current subframe is a downlink subframe, schedule downlink user equipment;

Step 102: When the current subframe is an uplink subframe, select a downlink transmission point for downlink transmission of the user equipment having downlink transmission requirements in the uplink subframe; if the current subframe is a downlink subframe , selecting an uplink transmission point for performing uplink transmission on the user equipment having an uplink transmission requirement in the downlink subframe;

Step 103: When scheduling the uplink user equipment and scheduling the user equipment with downlink transmission requirements to perform downlink transmission through the selected downlink transmission point, when the performance of the communication system is enhanced, schedule the user equipment with downlink transmission requirements Perform downlink transmission through the selected downlink transmission point; when the performance of the communication system is enhanced when scheduling the downlink user equipment and simultaneously scheduling the user equipment with uplink transmission requirements to perform uplink transmission through the selected uplink transmission point, scheduling The user equipment having uplink transmission requirements performs uplink transmission through the selected uplink transmission point.

It can be seen from the above embodiments that, in the case of enhanced system performance, the user equipment with downlink transmission requirements is scheduled while the original uplink user equipment is scheduled, or the user equipment with uplink transmission requirements is scheduled while the original downlink user equipment is scheduled , which can reduce the interference to the original uplink transmission point and the uplink user equipment or reduce the interference received by the original downlink transmission point and the downlink user equipment, and ensure that the user equipment with downlink transmission requirements or the user equipment with uplink transmission requirements can perform Normal downlink or uplink transmission.

In this embodiment, the scheduling method is applied to a base station, and the base station may be a serving base station for user equipment, a base station for centralized scheduling, or a macro base station.

In this embodiment, the following duplex mode is used as an example for illustration: within the coverage of a transmission point (such as a base station) (this coverage can be an independent cell with a cell ID, or a cell can be covered by the A physical area served by a service point), one user equipment is served by a transmission point for downlink, and another user equipment is served by another transmission point for uplink. In the embodiment of the present invention, the duplex mode may be called Space Division Full Duplex (SDFD, Space Division Full Duplex).

In this embodiment, a heterogeneous network is taken as an example for description. FIG. 2 is a schematic diagram of an application scenario of Embodiment 1 of the present invention. As shown in Figure 2, the heterogeneous network includes multiple macro cells. In each macro cell, a macro base station (MTP) with a large-scale antenna is set up. Within the coverage of the MTP, there are multiple single-antenna small A base station (STP, also referred to as "small transmission point" in the embodiment of the present invention) and multiple single-antenna mobile stations (UE), MTP and STP may be collectively referred to as "transmission point". However, in the embodiment of the present invention, the MTP, the STP and the number of antennas of the UE are not limited.

As shown in Figure 2, user equipment UE1 and UE2 are within the coverage of transmission point STP1, UE1 is served uplink by transmission point STP1 (UE1 can be called uplink user equipment at this time), UE2 is served downlink by transmission point STP2 (at this time UE2 may be referred to as downlink user equipment).

In this embodiment, the method may further include: determining whether the current subframe is an uplink subframe or a downlink subframe. Among them, determining whether the current subframe is an uplink subframe or a downlink subframe can use an existing method, for example, according to the TDD frame structure configuration of the current macro cell, determine whether the current subframe is an uplink subframe or a downlink subframe, thereby determining TDD one by one Whether each frame in the frame structure configuration is an uplink subframe or a downlink subframe.

In step 101, if the current subframe is an uplink subframe, schedule uplink user equipment; if the current subframe is a downlink subframe, schedule downlink user equipment. Wherein, an existing method may be used to schedule uplink user equipment or downlink user equipment, for example, schedule uplink user equipment or downlink user equipment according to a current scheduling rule.

In step 102, when the current subframe is an uplink subframe, select a downlink transmission point for downlink transmission of the user equipment having a downlink transmission requirement in the uplink subframe; if the current subframe is a downlink subframe In this case, an uplink transmission point for performing uplink transmission on the user equipment having uplink transmission requirements in the downlink subframe is selected. Wherein, the existing method can be used to detect the user equipment having the downlink transmission requirement in the uplink subframe and the user equipment having the uplink transmission requirement in the downlink subframe.

For example, a user equipment having an uplink transmission requirement or a user equipment having a downlink transmission requirement reports related requirement information to the base station.

In this embodiment, there may be one user equipment having an uplink transmission requirement or a plurality of user equipments having a downlink transmission requirement.

In this embodiment, the downlink transmission point and the uplink transmission point can be selected, for example, using a traversal method, that is, for all idle STPs in the current macro cell, these transmission points are used as the downlink transmission point or the uplink transmission point one by one , and select the transmission point with the best system performance as the selected downlink transmission point or uplink transmission point. In addition, other methods may also be used to select the downlink transmission point or the uplink transmission point, and the embodiment of the present invention does not limit the selection method of the uplink transmission point and the downlink transmission point.

The method for selecting the downlink transmission point or the uplink transmission point according to the embodiment of the present invention is exemplarily described below.

FIG. 3 is a schematic diagram of a method for selecting a downlink transmission point according to Embodiment 1 of the present invention. As shown in Figure 3, the method includes:

Step 301: among the idle transmission points in the current macro cell, at least two transmission points that have relatively large coupling loss or path loss with the macro base station in the current macro cell, or that have low reference signal reception strength are determined as a first set of candidate transmission points;

Step 302: Set the minimum transmission power value of each transmission point in the first set of candidate transmission points that enables the user equipment with downlink transmission requirements to normally perform downlink transmission;

Step 303: According to the set minimum transmission power value, determine the transmission point in the first candidate transmission point set whose coupling loss or path loss with the macro base station and with the active uplink transmission point satisfies the first preset condition as the selection downlink transmission point.

In this way, according to the set minimum transmission power and through the coupling loss or path loss to filter the downlink transmission point, the appropriate downlink transmission point can be quickly and effectively screened out, the interference to the original uplink is small, and the normal downlink transmission is satisfied requirements.

In this embodiment, the downlink transmission point selection method assumes that the large-scale fading information between different transmission points can interact, and the large-scale fading information includes, for example, coupling loss, path loss, shadow fading, LOS/NLOS status, and transceiver antenna Gain, or at least one of Reference Signal Received Strength (RSRP) and the like.

In step 301, among the idle transmission points in the current macro cell, at least two transmission points that have relatively large coupling loss or path loss with the macro base station in the current macro cell, or that have relatively low received strength of reference signals are determined as first candidate transmission points gather.

For example, it can be arranged in descending order of the coupling loss or path loss between the idle transmission point (STP) and the macro base station (MTP) in the current macro cell, or according to the reference signal received strength (RSRP) of the idle STP They are arranged in descending order, and the top Y STPs are determined as the first set of candidate transmission points. Wherein, Y is an integer greater than or equal to 2, and its value can be set according to actual needs.

In step 302, the minimum transmit power values (P ₁ , _{P 2} , . For example, the minimum transmit power value of each transmission point in the first set of candidate transmission points is set, so that the signal-to-noise ratio of the received signal of the user equipment having a downlink transmission requirement is 10 dB.

In step 303, according to the set minimum transmission power, the transmission point whose coupling loss with the macro base station and the coupling loss with the uplink transmission point in the first set of candidate transmission points satisfy the first preset condition is determined as the selected downlink transmission point transmission point. Wherein, the first preset condition can be set according to actual needs.

For example, the first preset condition can be represented by the following conditional formula (1):

Among them, P _y represents the minimum transmission power value of the yth transmission point in the first candidate transmission point set, Indicates the coupling loss or path loss between the yth STP and the MTP in the first set of candidate transmission points, Indicates the coupling loss or path loss between the y-th STP in the downlink first candidate transmission point set and the j-th active STP in the uplink, I _MTP and I _STP represent the acceptable interference level at the MTP and STP respectively, δ ₁ and δ ₂ represents an interference adjustment factor, which is used to relax the restrictions on acceptable interference values at MTP and STP, and can be set according to actual needs, y is an integer from 1 to Y, and Y represents the number of STPs in the first candidate transmission point set, j is a positive integer, and δ ₁ and δ ₂ are non-negative numbers.

In this embodiment, the values of I _MTP and I _STP can be set according to actual needs. For example, the average power of the interference signal is required to be 7dB lower than the received noise floor signal. At this time, when MTP is a macro base station, I _MTP takes The value is -106.5dBm. When the STP is an outdoor pico base station or a home femto base station, the value of I _STP is -98.5dBm; or, if the average power of the interference signal is required to be at the level of the dynamic range of the noise, I _MTP and I _STP The value of is increased accordingly.

In this embodiment, the downlink transmission point selection method may also include:

Step 304: When there is no transmission point in the first set of candidate transmission points whose coupling loss or path loss with the macro base station and with the active uplink transmission point satisfies the first preset condition, include in the first set of candidate transmission points determining the transmission point with the smallest sum of interference between the macro base station and each active uplink transmission point as the selected downlink transmission point; and when there are at least two couplings with the macro base station and active uplink transmission points in the first set of candidate transmission points When the loss or path loss meets the transmission point of the first preset condition, the transmission point with the smallest sum of interference to the macro base station and each active uplink transmission point among the transmission points satisfying the first preset condition in the first set of candidate transmission points Determined as the selected downlink transmission point.

In this way, an appropriate downlink transmission point can also be selected when there is no transmission point satisfying the condition or there are multiple transmission points satisfying the condition.

FIG. 4 is a schematic diagram of an uplink transmission point selection method according to Embodiment 1 of the present invention. As shown in Figure 4, the method includes:

Step 401: Determine at least two idle transmission points with smaller coupling loss or path loss with the user equipment having uplink transmission requirements as a second set of candidate transmission points;

Step 402: Remove the transmission point with the same precoding matrix index as the currently scheduled downlink user equipment from the second set of candidate transmission points to obtain a third set of candidate transmission points;

Step 403: Determine the transmission point whose coupling loss or path loss with the downlink transmission point in the third set of candidate transmission points satisfies the second preset condition as the selected uplink transmission point.

In this way, screening uplink transmission points according to coupling loss or path loss can quickly and effectively screen out suitable uplink transmission points, which are less interfered by the original downlink and meet the requirements of normal uplink transmission.

In step 401, at least two idle transmission points with smaller coupling loss or path loss with the user equipment having uplink transmission requirements are determined as a second set of candidate transmission points.

For example, to calculate the coupling loss between the user equipment with uplink transmission requirements and each transmission point in the idle state, assuming that the minimum coupling loss is AdB, the coupling loss can be greater than or equal to AdB and less than or equal to (A+X)dB A plurality of transmission points are used as a second set of candidate transmission points, where X is a preset value and can be set according to actual needs.

In step 402, the transmission points having the same precoding matrix index (PMI) as the currently scheduled downlink user equipment are removed from the second set of candidate transmission points to obtain a third set of candidate transmission points. Wherein, the PMI of the STP in the second candidate transmission point set corresponds to channel information between the MTP in the current macro cell and the STP, and the PMI includes horizontal PMI or vertical PMI or overall PMI.

In this embodiment, in a multi-cell scenario, step 402 may further include: removing a transmission point having the same precoding matrix index as a user equipment served by a macro base station of an adjacent cell from the second set of candidate transmission points.

In step 403, the transmission point whose coupling loss or path loss with the downlink transmission point satisfies the second preset condition in the third candidate transmission point set is determined as the selected uplink transmission point. Wherein, the second preset condition can be set according to actual needs.

For example, the second preset condition can be represented by the following conditional formula (2):

in, Indicates the transmit power of the i-th downlink STP, PL ^STP.i is the coupling loss or path loss between the i-th downlink STP and the STP in the third candidate transmission point set. For the interference received by the STP in the third candidate transmission point set from the MTP in the macro cell, I is the acceptable interference value at the STP, and δ represents the interference adjustment factor, which is used to relax the limit of the acceptable interference value at the STP Conditions can be set according to actual needs, i is a positive integer, and δ is a non-negative number.

In this embodiment, I can be set according to actual needs, for example, the average power of the interference signal is required to be 7dB lower than the received noise floor signal. At this time, when the STP is an outdoor pico base station or a home femto base station, I=-98.5 dBm. When the MTP is a macro base station, the acceptable interference value is I=-106.5dBm; or, if the average power of the interference signal is required to be at the level of the dynamic range of the noise, the value of I can be increased accordingly.

In this embodiment, the method for selecting an uplink transmission point may further include:

Step 404: When the second set of candidate transmission points removes the transmission point with the same precoding matrix index as the currently scheduled downlink user equipment, the number of remaining transmission points is 0, the transmission point that will receive the least interference from the macro base station in the current macro cell determined as a third set of candidate transmission points;

Step 405: When there is no transmission point whose coupling loss or path loss with the downlink transmission point satisfies the second preset condition in the third set of candidate transmission points, minimize the sum of interference from all downlink transmission points in the third set of candidate transmission points as the selected uplink transmission point; and when there are at least two transmission points whose coupling loss or path loss with the downlink transmission point satisfies the second preset condition in the third candidate transmission point set, the third candidate transmission point Among the transmission points in the set that meet the second preset condition, the transmission point that receives the smallest sum of interference from all downlink transmission points is used as the selected uplink transmission point.

Step 406: Perform multi-user precoding on the determined selected uplink transmission point.

In this embodiment, step 404 may be performed after step 402, and step 405 may be performed after step 403.

In this way, through step 404 and step 405, it can be ensured that a suitable uplink transmission point is screened out, and through step 406, the interference between the MTP and the selected STP can be further eliminated.

In step 406, for example, methods such as multi-user zero-forcing precoding or block diagonalization precoding can be used to perform multi-user precoding.

The above is an exemplary description of the method for selecting a downlink transmission point and an uplink transmission point in this embodiment.

In this embodiment, after the downlink transmission point and the uplink transmission point are selected in step 102, in step 103, while scheduling the uplink user equipment, the user equipment with downlink transmission requirements is scheduled through the selected downlink transmission point When the performance of the communication system is enhanced during downlink transmission, scheduling the user equipment with downlink transmission requirements to perform downlink transmission through the selected downlink transmission point; scheduling the user equipment with uplink transmission requirements while scheduling the downlink user equipment When performance of the communication system is enhanced when performing uplink transmission through the selected uplink transmission point, schedule the user equipment having uplink transmission requirements to perform uplink transmission through the selected uplink transmission point.

In this embodiment, the transmission point for scheduling the uplink user equipment to perform uplink transmission may be different from the selected downlink transmission point, and the transmission point for scheduling the downlink user equipment to perform downlink transmission may also be different from the selected uplink transmission point, namely , in this embodiment, the scheduling mode of SDFD can be used.

In this embodiment, when the current subframe is an uplink subframe, the performance of the communication system when the user equipment with downlink transmission requirements is scheduled to perform downlink transmission through the selected downlink transmission point while scheduling the uplink user equipment Enhancement means that when scheduling the uplink user equipment and simultaneously scheduling the user equipment with downlink transmission requirements to perform downlink transmission through the selected downlink transmission point, the performance of the communication system is better than that in the original scheduling mode (that is, scheduling uplink user equipment) system performance. Wherein, when scheduling the uplink user equipment and simultaneously scheduling the user equipment with downlink transmission requirements to perform downlink transmission through the selected downlink transmission point, the performance of the communication system includes uplink and downlink performance. User equipment) system performance only includes uplink performance.

In this embodiment, when the current subframe is a downlink subframe, the performance of the communication system when the user equipment with uplink transmission requirements is scheduled to perform uplink transmission through the selected uplink transmission point while scheduling the downlink user equipment Enhancement means that when scheduling the downlink user equipment and simultaneously scheduling the user equipment with uplink transmission requirements to perform uplink transmission through the selected uplink transmission point, the performance of the communication system is better than that in the original scheduling mode (that is, scheduling downlink user equipment) system performance. Wherein, when the downlink user equipment is scheduled and the user equipment with uplink transmission requirements is scheduled to perform uplink transmission through the selected uplink transmission point, the performance of the communication system includes downlink and uplink performance. User equipment) system performance only includes downlink performance.

In this embodiment, when the current subframe is an uplink subframe, the communication system needs to determine when scheduling the uplink user equipment and simultaneously scheduling the user equipment with downlink transmission requirements to perform downlink transmission through the selected downlink transmission point Whether the performance of the user equipment is enhanced, that is, whether the system performance in the SDFD mode is enhanced; in the case that the current subframe is a downlink subframe, it is necessary to determine whether to schedule the downlink user equipment and at the same time schedule the user equipment with uplink transmission requirements through the selected Whether the performance of the communication system is enhanced when the uplink transmission point performs uplink transmission, that is, whether the system performance in the SDFD mode is enhanced.

In this embodiment, the foregoing determination may be performed according to at least one of transmission rate, spectrum efficiency, and throughput, and the foregoing determination may also be performed according to other performance indicators. The embodiments of the present invention do not limit specific indicators used to judge system performance.

In this embodiment, taking the transmission rate as an example, in the case that the current subframe is a downlink subframe, how to judge and schedule the downlink user equipment while scheduling the uplink transmission point selected by the user equipment with uplink transmission requirements The method of whether the performance of the communication system is enhanced during uplink transmission is exemplarily described.

First, calculate the transmission rate of the downlink user equipment in the original scheduling mode, for example, it can be calculated according to the following formula (3):

Among them, R _DL represents the transmission rate of the downlink user equipment, S _DL represents the set of active downlink user equipment, S _i represents the useful signal power received by the i-th user equipment, with respectively represent the interference inside and outside the coverage area of the macro base station received by the i-th user equipment, N represents signal noise, and i is a positive integer.

In this embodiment, it is assumed that all transmission points in the same macro cell are connected to the same resource pool, so they can share channel information, channel measurement results, user data, and so on. In the original scheduling mode, the user equipment can measure the RSRP of each cell or set the CSI interference measurement set through the serving base station to obtain with the estimated value of or The estimated value of , and report it to the serving base station; or the centralized scheduling base station can obtain it according to the user's multiple reports with the estimated value of or estimated value. In addition, the base station can also obtain the estimated received signal value of the user, namely S _i , according to the channel condition reported by the user equipment.

Then, calculate the transmission rates of the downlink user equipment and the uplink user equipment when the user equipment with uplink transmission requirements is uplink transmitted through the selected uplink transmission point while scheduling the downlink user equipment, that is, in the SDFD mode. The transmission rate of the user equipment and the uplink user equipment.

In this embodiment, the transmission rate of the downlink user equipment can also be calculated using the above formula (3), wherein, in the SDFD mode, S _i and Subject to change. According to Si in _SDFD mode and Using the above formula (3), calculate the transmission rate R' _DL of the downlink user equipment in SDFD mode.

For example, in the SDFD mode, the change of S _i depends on the serving base station of the i-th user equipment. If the serving base station of the i-th user equipment is STP, since STP will not adopt an interference suppression scheme, S _i will not change; if the serving base station of the i-th user equipment is MTP, since MTP will adopt an interference suppression scheme, suppressing The interference of uplink receiving STP, so S _i will be lower than that in the original scheduling mode. Wherein, regardless of whether the serving base station of the user equipment is STP or MTP, the received power value of the user equipment in the SDFD mode can be estimated by the serving base station.

For interfering signals, will not change, and It will increase accordingly, that is, the interference of the signal sent by the uplink user equipment on the signal received by the downlink user equipment will be increased. The method for estimating interference from user equipment to user equipment according to the embodiment of the present invention will be exemplarily described below.

FIG. 5 is a schematic diagram of a user equipment to user equipment interference estimation method according to Embodiment 1 of the present invention. As shown in Figure 5, the method includes:

Step 501: Calculate the distance from the interference source user equipment to the interfered user equipment according to the location of the active user equipment in the current macro cell;

Step 502: Estimate the transmit power of the uplink user equipment according to the channel measurement results between the uplink user equipment and a possible uplink serving transmission point;

Step 503: Estimate the power of interference signals from user equipment to user equipment according to the path loss between user equipments, the distance from the interference source user equipment to the interfered user equipment, and the transmission power of the uplink user equipment.

In step 501, for example, the serving base station, the base station performing centralized scheduling, or the macro base station obtains the location coordinates of active user equipments for downlink transmission and uplink transmission in the current macro cell through a positioning algorithm, thereby calculating the distance between the interference source user equipment and the interfered user equipment. The distance of the user device.

In step 502, for example, the serving base station, the base station performing centralized scheduling, or the macro base station estimates the transmit power of the uplink user equipment according to the channel measurement results reported by the uplink user equipment between itself and a possible uplink serving transmission point.

In step 503, for example, the path loss is calculated according to the path loss formula between the user equipment and the user equipment, and the distance from the interference source user equipment to the interfered user equipment obtained in step 501 and the uplink distance obtained in step 502 are used. The transmit power of the user equipment is used to estimate the power of the interference signal from the user equipment to the user equipment.

In the SDFD mode, for example, the transmission rate of the uplink user equipment can be calculated according to the following formula (4):

Among them, R _UL represents the transmission rate of the uplink user equipment, S _UL represents the set of active uplink user equipment, S _j represents the useful signal power received by the jth user equipment, with respectively represent the interference inside and outside the coverage area of the macro base station received by the jth user equipment, N represents signal noise, and j is a positive integer.

in, with The measurement of is not supported in the existing LTE system. In this embodiment, the selected uplink STP can be made to measure the surrounding MTPs and reference signals sent by STPs in an idle state, so as to estimate the interference value.

In this way, the transmission rate of the downlink user equipment in the original scheduling mode is R _DL , the transmission rate of the downlink user equipment in the SDFD mode is R' _DL , and the transmission rate of the uplink user equipment in the SDFD mode is R _UL . By comparing the magnitude relationship between the sum of R' _DL and R _UL and R _DL , it is judged whether the system performance in the SDFD mode is enhanced. When the sum of R' _DL and R _UL is greater than R _DL , it is judged that the system performance in the SDFD mode is enhanced, otherwise, there is no enhancement.

Above, the current subframe is a downlink subframe as an example. In the case where the current subframe is an uplink subframe, the method for calculating the transmission rate is the same as the above method used when the current subframe is a downlink subframe. , which will not be repeated here.

In this embodiment, when the number of user equipment with downlink transmission requirements or user equipment with uplink transmission requirements is one, when the original uplink user equipment or downlink user equipment and the one user equipment with downlink transmission requirements are scheduled at the same time Or when the system performance is enhanced for user equipment with uplink transmission requirements, simultaneously schedule the original uplink user equipment or downlink user equipment and the user equipment with downlink transmission requirements or user equipment with uplink transmission requirements; when the system performance is not In the case of enhancement, the original scheduling mode is maintained, that is, the original uplink user equipment or downlink user equipment is scheduled.

In this embodiment, when the number of user equipment with downlink transmission requirements or the number of user equipment with uplink transmission requirements is two or more, for example, assuming that the number of user equipment with downlink transmission requirements is N _DL , N _DL is a positive integer greater than or equal to 2, and at this time, it can be judged one by one user equipment. For example, for the i-th user equipment among the N _DL user equipments with downlink transmission requirements, it is judged whether the performance of the system is enhanced when the original uplink user equipment and the i-th downlink user equipment are simultaneously scheduled, and when the system performance is enhanced, then The i+1th user equipment is judged, and when the system performance is not enhanced, the original uplink user equipment and the (i-1) downlink user equipment with downlink transmission requirements before the i-th user equipment can be scheduled at the same time. The processing method for the user equipment with uplink transmission requirements is similar and will not be repeated here.

In this embodiment, the scheduling method may also include:

Step 104: When there is a user equipment with a cache greater than the preset threshold in the user equipment with downlink transmission requirements, select a downlink transmission point to perform downlink transmission on the user equipment with a buffer greater than the preset threshold among the user equipment with downlink transmission requirements ; When there is a user equipment with a buffer greater than the preset threshold in the user equipment with uplink transmission requirements, select an uplink transmission point to perform uplink transmission on the user equipment with a buffer greater than the preset threshold among the user equipment with uplink transmission requirements.

In this embodiment, step 104 is an optional step, which can be set before step 102 . In this way, before selecting a downlink transmission point or an uplink transmission point in step 102, the uplink and downlink scheduling mode is determined according to the buffer state of the user equipment, which can reduce the waiting delay of the user equipment.

In this embodiment, the method for selecting the downlink transmission point and the uplink transmission point is the same as the method used in step 102, and will not be repeated here.

In this embodiment, the preset threshold may be set according to actual needs, for example, set according to the time delay required by the system.

It can be seen from the above embodiments that, in the case of enhanced system performance, the user equipment with downlink transmission requirements is scheduled while the original uplink user equipment is scheduled, or the user equipment with uplink transmission requirements is scheduled while the original downlink user equipment is scheduled , which can reduce the interference to the original uplink transmission point and the uplink user equipment or reduce the interference received by the original downlink transmission point and the downlink user equipment, and ensure that the user equipment with downlink transmission requirements or the user equipment with uplink transmission requirements can perform Normal downlink or uplink transmission.

Example 2

The embodiment of the present invention also provides a scheduling method for a communication system, which is applied to a base station. FIG. 6 is a schematic diagram of a scheduling method for a communication system according to Embodiment 2 of the present invention. As shown in Figure 6, the method includes:

Step 601: Determine the TDD frame structure configuration of each macro cell;

Step 602: judging whether the current subframe is an uplink subframe, when the judging result is "yes", go to step 603, and when the judging result is "no", go to step 610;

Step 603: Scheduling uplink user equipment according to the current scheduling criterion, wherein the number of uplink user equipment is M _UL , and M _UL is a positive integer;

Step 604: Detect user equipment with downlink transmission requirements in the uplink subframe, and set i=1, where the number of user equipment with downlink transmission requirements is N _DL , and N _DL is a positive integer;

Step 605: Select a downlink transmission point for the i-th user equipment among the N _DL user equipments with downlink transmission requirements;

Step 606: Judging whether the performance of the system is enhanced when scheduling the current M _UL uplink user equipment and i downlink user equipment, when the judgment result is "No", enter step 607, when the judgment result is "Yes", enter step 608;

Step 607: Simultaneously schedule the current M _UL uplink user equipments and (i-1) downlink user equipments before the i-th user equipment;

Step 608: set i=i+1;

Step 609: Judging whether i is greater than N _DL , when the judgment result is "Yes", go to Step 607, and when the judgment result is "No", go to Step 605;

Step 610: Scheduling downlink user equipment according to the current scheduling criterion, wherein the number of downlink user equipment is M _DL , and M _DL is a positive integer;

Step 611: Detect user equipment with uplink transmission requirements in the downlink subframe, and set i=1, where the number of user equipment with uplink transmission requirements is N _UL , and N _UL is a positive integer;

Step 612: Select an uplink transmission point for the i-th user equipment among the N _UL user equipments with uplink transmission requirements;

Step 613: Judging whether the performance of the system is enhanced when scheduling the current M _DL downlink user equipments and i uplink user equipments, when the judgment result is "no", enter step 614, when the judgment result is "yes", enter step 615;

Step 614: Simultaneously schedule the current M _DL downlink user equipments and the (i-1) uplink user equipments before the i-th user equipment;

Step 615: set i=i+1;

Step 616: Judging whether i is greater than N _UL , if the judgment result is "Yes", go to Step 614, and if the judgment result is "No", go to Step 612.

In this embodiment, the method used when performing the above steps is the same as that described in Embodiment 1, and will not be repeated here.

It can be seen from the above embodiments that, in the case of enhanced system performance, the user equipment with downlink transmission requirements is scheduled while the original uplink user equipment is scheduled, or the user equipment with uplink transmission requirements is scheduled while the original downlink user equipment is scheduled , which can reduce the interference to the original uplink transmission point and the uplink user equipment or reduce the interference received by the original downlink transmission point and the downlink user equipment, and ensure that the user equipment with downlink transmission requirements or the user equipment with uplink transmission requirements can perform Normal downlink or uplink transmission.

Example 3

The embodiment of the present invention also provides a scheduling method for a communication system, which is applied to a base station. Fig. 7 is a schematic diagram of a scheduling method for a communication system according to Embodiment 3 of the present invention. As shown in Figure 7, the method includes:

Step 701: Determine the TDD frame structure configuration of each macro cell;

Step 702: judging whether the current subframe is an uplink subframe, when the judging result is "yes", go to step 703, and when the judging result is "no", go to step 712;

Step 703: Scheduling uplink user equipment according to the current scheduling criterion, wherein the number of uplink user equipment is M _UL , and M _UL is a positive integer;

Step 704: Detect user equipment with downlink transmission requirements in the uplink subframe, and set i=1, where the number of user equipment with downlink transmission requirements is N _DL , and N _DL is a positive integer;

Step 705: Judging whether there is a user equipment whose cache exceeds a predetermined threshold among the user equipments with downlink transmission requirements, if the judgment result is "Yes", go to step 706, and if the judgment result is "No", go to step 707;

Step 706: Select a downlink transmission point to perform downlink transmission on the user equipment whose cache is greater than the preset threshold, that is, simultaneously schedule these downlink user equipment and the current M _UL uplink user equipment;

Step 707: Select a downlink transmission point for the i-th user equipment among the N _DL user equipments with downlink transmission requirements;

Step 708: Judging whether the performance of the system is enhanced when scheduling the current M _UL uplink user equipment and the i-th downlink user equipment, when the judgment result is "No", enter step 709, when the judgment result is "Yes", enter Step 710;

Step 709: Simultaneously schedule the current M _UL uplink user equipments and (i-1) downlink user equipments before the i-th user equipment;

Step 710: set i=i+1;

Step 711: Judging whether i is greater than N _DL , when the judgment result is "Yes", go to Step 709, and when the judgment result is "No", go to Step 707;

Step 712: Scheduling downlink user equipment according to the current scheduling criterion, wherein the number of downlink user equipment is M _DL , and M _DL is a positive integer;

Step 713: Detect user equipment with uplink transmission requirements in the downlink subframe, and set i=1, where the number of user equipment with uplink transmission requirements is N _UL , and N _UL is a positive integer;

Step 714: Judging whether there is a user equipment whose cache exceeds a predetermined threshold among the user equipments with uplink transmission requirements, when the judgment result is "Yes", go to step 715, and when the judgment result is "No", go to step 716;

Step 715: Select an uplink transmission point to perform uplink transmission on the user equipment whose cache is greater than the preset threshold, that is, simultaneously schedule these uplink user equipment and the current _MDL downlink user equipment;

Step 716: Select an uplink transmission point for the i-th user equipment among the N _UL user equipments with downlink transmission requirements;

Step 717: Judging whether the performance of the system is enhanced when scheduling the current M _DL downlink user equipments and i uplink user equipments, when the judgment result is "no", enter step 718, when the judgment result is "yes", enter step 719;

Step 718: Simultaneously schedule the current M _DL downlink user equipments and the (i-1) uplink user equipments before the i-th user equipment;

Step 719: Set i=i+1;

Step 720: Judging whether i is greater than N _UL , if the judgment result is "Yes", go to Step 718, and if the judgment result is "No", go to Step 716.

It can be seen from the above embodiments that, in the case of enhanced system performance, the user equipment with downlink transmission requirements is scheduled while the original uplink user equipment is scheduled, or the user equipment with uplink transmission requirements is scheduled while the original downlink user equipment is scheduled , which can reduce the interference to the original uplink transmission point and the uplink user equipment or reduce the interference received by the original downlink transmission point and the downlink user equipment, and ensure that the user equipment with downlink transmission requirements or the user equipment with uplink transmission requirements can perform Normal downlink or uplink transmission.

In addition, determining the uplink and downlink scheduling mode according to the buffer state of the user equipment can reduce the waiting delay of the user equipment.

Example 4

An embodiment of the present invention provides a scheduling device for a communication system, which is configured in a base station. Since the problem-solving principle of this device is similar to the method described in Embodiment 1 or Embodiment 2 or Embodiment 3, its specific implementation can refer to the implementation of the method described in Embodiment 1-3, and the same content will not be repeated. .

FIG. 8 is a schematic diagram of a scheduling device for a communication system according to Embodiment 4 of the present invention. As shown in FIG. 8, the scheduling device 800 includes:

A first scheduling unit 801, configured to schedule uplink user equipment when the current subframe is an uplink subframe; and schedule downlink user equipment when the current subframe is a downlink subframe;

A selection unit 802, configured to select, when the current subframe is an uplink subframe, a downlink transmission point for downlink transmission of a user equipment having a downlink transmission requirement in the uplink subframe; when the current subframe is a downlink subframe In the case of a subframe, select an uplink transmission point for performing uplink transmission on the user equipment having an uplink transmission requirement in the downlink subframe;

The second scheduling unit 803 is configured to schedule the user equipment with downlink transmission requirements while scheduling the uplink user equipment, when the performance of the communication system is enhanced when the performance of the communication system is enhanced through the selected downlink transmission point, schedule the user equipment with downlink transmission requirements The user equipment with downlink transmission needs performs downlink transmission through the selected downlink transmission point; the performance of the communication system when the user equipment with uplink transmission needs is scheduled to perform uplink transmission through the selected uplink transmission point while scheduling the downlink user equipment In the enhanced case, the user equipment with uplink transmission requirements is scheduled to perform uplink transmission through the selected uplink transmission point.

FIG. 9 is a schematic diagram of the selection unit 802 according to Embodiment 4 of the present invention. As shown in Figure 9, the selection unit 802 includes:

The first determining unit 901 is configured to determine, among the idle transmission points in the current macro cell, at least two transmission points that have relatively large coupling loss or path loss with the macro base station in the current macro cell, or that have relatively low received strength of reference signals as the second a set of candidate transmission points;

A setting unit 902, configured to set the minimum transmission power value of each transmission point in the first set of candidate transmission points that enables the user equipment with downlink transmission requirements to normally perform downlink transmission;

The second determination unit 903 is configured to, according to the set minimum transmit power value, determine the coupling loss or path loss between the first candidate transmission point set and the macro base station and the active uplink transmission point satisfying the first preset condition The transmission point is determined as the selected downlink transmission point;

The third determining unit 904 is configured to: when there is no transmission point whose coupling loss or path loss with the macro base station and with the active uplink transmission point satisfies the first preset condition in the first set of candidate transmission points, the first candidate In the set of transmission points, the transmission point with the smallest sum of interference between the macro base station and each active uplink transmission point is determined as the selected downlink transmission point; When the coupling loss or path loss of the point meets the transmission point of the first preset condition, the transmission point that satisfies the first preset condition in the first candidate transmission point set has the smallest total interference to the macro base station and each active uplink transmission point The transmission point is determined as the selected downlink transmission point;

A fourth determining unit 905, configured to determine at least two idle transmission points with smaller coupling loss or path loss with the user equipment having uplink transmission requirements as a second set of candidate transmission points;

A removing unit 906, configured to remove a transmission point having the same precoding matrix index as the currently scheduled downlink user equipment from the second set of candidate transmission points, to obtain a third set of candidate transmission points;

The fifth determining unit 907 is configured to determine a transmission point whose coupling loss or path loss with the downlink transmission point in the third set of candidate transmission points satisfies the second preset condition as the selected uplink transmission point;

The sixth determination unit 908 is configured to, when the second set of candidate transmission points removes the transmission point having the same precoding matrix index as that of the currently scheduled downlink user equipment and the remaining number of transmission points is 0, the current macro cell The transmission point with the least interference of the macro base station is determined as the third set of candidate transmission points;

The seventh determination unit 909 is configured to, when there is no transmission point whose coupling loss or path loss with the downlink transmission point satisfies the second preset condition in the third set of candidate transmission points, select all the transmission points in the third set of candidate transmission points The transmission point with the smallest sum of downlink transmission point interference is used as the selected uplink transmission point; and when there are at least two transmission points whose coupling loss or path loss with the downlink transmission point satisfies the second preset condition in the third set of candidate transmission points, Taking the transmission point with the smallest sum of interference from all downlink transmission points among the transmission points satisfying the second preset condition in the third candidate transmission point set as the selected uplink transmission point; and/or

The precoding unit 910 is configured to perform multi-user precoding on the transmission points in the third candidate transmission point set or the selected uplink transmission points.

As shown in Figure 8, the scheduling device 800 may also include:

The third scheduling unit 804 is configured to select a downlink transmission point when there is a user equipment with a cache greater than a preset threshold in the user equipment with a downlink transmission demand The user equipment with a threshold value performs downlink transmission; when there is a user equipment with a cache greater than a preset threshold in the user equipment with an uplink transmission requirement, select an uplink transmission point for the user equipment with an uplink transmission requirement with a buffer greater than the preset threshold user equipment for uplink transmission.

A judging unit 805, configured to, when the current subframe is an uplink subframe, according to at least one of transmission rate, spectrum efficiency, and throughput, judge to schedule the user with downlink transmission requirements while scheduling the uplink user equipment Whether the performance of the communication system is enhanced when the device performs downlink transmission through the selected downlink transmission point; when the current subframe is a downlink subframe, according to at least one of transmission rate, spectrum efficiency and throughput, it is judged when scheduling the Whether the performance of the communication system is enhanced when the downlink user equipment simultaneously schedules the user equipment with uplink transmission requirements to perform uplink transmission through the selected uplink transmission point.

In this embodiment, the judging unit 805 includes a first estimating unit (not shown in FIG. 8 ), which is used to estimate interference from user equipment to user equipment;

Fig. 10 is a schematic diagram of the first estimation unit. As shown in Figure 10, the first estimation unit 1000 includes:

A calculation unit 1001, configured to calculate the distance from the interference source user equipment to the interfered user equipment according to the location of the active user equipment in the current macro cell;

A second estimating unit 1002, configured to estimate the transmit power of the uplink user equipment according to the channel measurement results between the uplink user equipment and a possible uplink serving transmission point;

The third estimating unit 1003 is configured to estimate the power of the interference signal from the user equipment to the user equipment according to the path loss between the user equipments, the distance from the interference source user equipment to the interfered user equipment, and the transmission power of the uplink user equipment .

In this embodiment, the principles of the above-mentioned units of the device to solve the problem are similar to the steps of the method described in Embodiment 1 or Embodiment 2 or Embodiment 3, so its specific implementation can refer to the description of Embodiment 1-3 The implementation of the method, the same content will not be repeated.

It can be seen from the above embodiments that, in the case of enhanced system performance, the user equipment with downlink transmission requirements is scheduled while the original uplink user equipment is scheduled, or the user equipment with uplink transmission requirements is scheduled while the original downlink user equipment is scheduled , which can reduce the interference to the original uplink transmission point and the uplink user equipment or reduce the interference received by the original downlink transmission point and the downlink user equipment, and ensure that the user equipment with downlink transmission requirements or the user equipment with uplink transmission requirements can perform Normal downlink or uplink transmission.

Example 5

An embodiment of the present invention also provides a base station configured with the scheduling device 800 of Embodiment 4, and the same content will not be repeated here.

FIG. 11 is a schematic structural diagram of a base station according to Embodiment 5 of the present invention. As shown in FIG. 11 , a base station 1100 may include: a central processing unit (CPU) 1101 and a memory 1102; the memory 1102 is coupled to the central processing unit 1101. Among them, the memory 1102 can store various data; in addition, it also stores information processing programs, and executes the programs under the control of the central processing unit 1101 .

Wherein, the central processing unit 1101 may be configured to implement the scheduling method in Embodiment 1. For example, the central processing unit 1101 may be configured to perform the following control: when the current subframe is an uplink subframe, schedule uplink user equipment; when the current subframe is a downlink subframe, schedule downlink user equipment; When the current subframe is an uplink subframe, select a downlink transmission point for downlink transmission of the user equipment having a downlink transmission requirement in the uplink subframe; when the current subframe is a downlink subframe, select a point for downlink transmission An uplink transmission point for performing uplink transmission on the user equipment with uplink transmission requirements in the downlink subframe; when scheduling the uplink user equipment and at the same time scheduling the user equipment with downlink transmission requirements to perform downlink transmission through the selected downlink transmission point, the When the performance of the communication system is enhanced, scheduling the user equipment with downlink transmission requirements to perform downlink transmission through the selected downlink transmission point; scheduling the user equipment with uplink transmission requirements through the selected downlink transmission point while scheduling the downlink user equipment When the performance of the communication system is enhanced when the uplink transmission point performs uplink transmission, the user equipment with uplink transmission requirements is scheduled to perform uplink transmission through the selected uplink transmission point.

In addition, as shown in FIG. 11 , the base station 1100 may further include: a transceiver 1103 and an antenna 1104 ; wherein, the functions of the above components are similar to those of the prior art, and will not be repeated here. It should be noted that the base station 1100 does not necessarily include all the components shown in FIG. 11 ; in addition, the base station 1100 may also include components not shown in FIG. 11 , and reference may be made to the prior art.

It can be seen from the above embodiments that, in the case of enhanced system performance, the user equipment with downlink transmission requirements is scheduled while the original uplink user equipment is scheduled, or the user equipment with uplink transmission requirements is scheduled while the original downlink user equipment is scheduled , which can reduce the interference to the original uplink transmission point and the uplink user equipment or reduce the interference received by the original downlink transmission point and the downlink user equipment, and ensure that the user equipment with downlink transmission requirements or the user equipment with uplink transmission requirements can perform Normal downlink or uplink transmission.

An embodiment of the present invention also provides a computer-readable program, wherein when the program is executed in the scheduling device or the base station, the program causes the computer to execute the program described in Embodiment 1 or 2 or 3 in the scheduling device or the base station. scheduling method.

An embodiment of the present invention also provides a storage medium storing a computer-readable program, wherein the computer-readable program enables a computer to execute the scheduling method described in Embodiment 1, 2, or 3 in a scheduling device or a base station.

The above devices and methods of the present invention can be implemented by hardware, or by combining hardware and software. The present invention relates to such a computer-readable program that, when the program is executed by a logic component, enables the logic component to realize the above-mentioned device or constituent component, or enables the logic component to realize the above-mentioned various methods or steps. The present invention also relates to a storage medium for storing the above program, such as hard disk, magnetic disk, optical disk, DVD, flash memory and the like.

The scheduling device and/or the scheduling method described in conjunction with the embodiments of the present invention may be directly embodied as hardware, a software module executed by a processor, or a combination of both. For example, one or more of the functional block diagrams shown in FIG. 8 and/or one or more combinations of the functional block diagrams (for example, a first scheduling unit, a selection unit, a second scheduling unit, etc.), may correspond to Each software module of the program flow may also correspond to each hardware module. These software modules may respectively correspond to the steps shown in FIG. 1 . These hardware modules, for example, can be realized by solidifying these software modules by using a Field Programmable Gate Array (FPGA).

A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM or any other form of storage medium known in the art. A storage medium can be coupled to the processor such that the processor can read information from, and write information to, the storage medium, or it can be an integral part of the processor. The processor and storage medium can be located in the ASIC. The software module can be stored in the memory of the base station, or can be stored in a memory card that can be inserted into the base station. For example, if the equipment (such as a base station) adopts a large-capacity MEGA-SIM card or a large-capacity flash memory device, the software module can be stored in the MEGA-SIM card or large-capacity flash memory device.

One or more of the functional blocks described in the accompanying drawings and/or one or more combinations of the functional blocks can be implemented as a general-purpose processor, a digital signal processor (DSP) for performing the functions described in this application ), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any suitable combination thereof. One or more of the functional blocks described in the drawings and/or one or more combinations of the functional blocks can also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors processor, one or more microprocessors in communication with a DSP, or any other such configuration.

The present invention has been described above in conjunction with specific embodiments, but those skilled in the art should be clear that these descriptions are all exemplary and not limiting the protection scope of the present invention. Those skilled in the art can make various variations and modifications to the present invention according to the spirit and principle of the present invention, and these variations and modifications are also within the scope of the present invention.

Regarding the implementation manner comprising the above embodiments, the following additional notes are also disclosed:

Supplementary note 1. A dispatching device for a communication system, the device comprising:

A first scheduling unit, the first scheduling unit is configured to schedule uplink user equipment when the current subframe is an uplink subframe; and schedule downlink user equipment when the current subframe is a downlink subframe;

A selection unit, the selection unit is configured to select a downlink transmission point for downlink transmission of user equipment having downlink transmission requirements in the uplink subframe when the current subframe is an uplink subframe; in the current subframe In the case of a downlink subframe, selecting an uplink transmission point for performing uplink transmission on a user equipment having an uplink transmission requirement in the downlink subframe;

A second scheduling unit, the second scheduling unit is configured to schedule the performance of the communication system when the user equipment having a downlink transmission requirement performs downlink transmission through the selected downlink transmission point while scheduling the uplink user equipment In the enhanced case, schedule the user equipment with downlink transmission requirements to perform downlink transmission through the selected downlink transmission point; schedule the user equipment with uplink transmission requirements through the selected downlink transmission point while scheduling the downlink user equipment When the performance of the communication system is enhanced when the uplink transmission point performs uplink transmission, the user equipment having uplink transmission requirements is scheduled to perform uplink transmission through the selected uplink transmission point.

Supplement 2. The device according to Supplement 1, wherein the device further includes:

A third scheduling unit, the third scheduling unit is configured to select a downlink transmission point for the user with a downlink transmission requirement when there is a user equipment with a cache greater than a preset threshold in the user equipment with a downlink transmission requirement The user equipment whose cache is greater than the preset threshold in the device performs downlink transmission; when there is a user equipment with a cache greater than the preset threshold among the user equipment with uplink transmission requirements, select an uplink transmission point for the user equipment with The user equipments buffered in the user equipments with uplink transmission requirements greater than the preset threshold perform uplink transmission.

Supplement 3. The device according to Supplement 1, wherein the device further includes:

A judging unit, the judging unit is configured to judge, according to at least one of transmission rate, spectrum efficiency and throughput, when scheduling the uplink user equipment and scheduling the downlink user equipment when the current subframe is an uplink subframe Whether the performance of the communication system is enhanced when the user equipment with transmission requirements performs downlink transmission through the selected downlink transmission point; if the current subframe is a downlink subframe, according to at least one of transmission rate, spectrum efficiency and throughput One, judging whether the performance of the communication system is enhanced when the downlink user equipment is scheduled and the user equipment with uplink transmission requirements is scheduled to perform uplink transmission through the selected uplink transmission point.

Supplement 4. The device according to Supplement 3, wherein the judging unit includes:

A first estimating unit configured to estimate user equipment to user equipment interference;

Wherein, the first estimation unit includes:

A calculation unit, the calculation unit is used to calculate the distance from the interference source user equipment to the interfered user equipment according to the position of the active user equipment in the current macro cell;

A second estimating unit, configured to estimate the transmit power of the uplink user equipment according to channel measurement results between the uplink user equipment and a possible uplink serving transmission point;

A third estimating unit, the third estimating unit is configured to estimate the distance from the user equipment to the user according to the path loss between the user equipment, the distance from the interference source user equipment to the interfered user equipment, and the transmission power of the uplink user equipment The power of the device's interfering signal.

Supplement 5. The device according to Supplement 1, wherein the selection unit includes:

A first determining unit, the first determining unit is configured to use at least two transmission points with relatively large coupling loss or path loss or relatively low reference signal reception strength between the idle transmission points in the current macro cell and the macro base station in the current macro cell The point is determined as the first set of candidate transmission points;

A setting unit, the setting unit is configured to set the minimum transmission power value of each transmission point in the first set of candidate transmission points that enables the user equipment with downlink transmission requirements to normally perform downlink transmission;

A second determining unit, the second determining unit is configured to, according to the minimum transmit power value, set the coupling loss or path loss between the macro base station and the active uplink transmission point in the first set of candidate transmission points to satisfy the first The transmission point with preset conditions is determined as the selected downlink transmission point.

Supplement 6. The device according to Supplement 5, wherein the selection unit further includes:

A third determining unit, the third determining unit is used when there is no transmission point in the first candidate transmission point set whose coupling loss or path loss with the macro base station and with the active uplink transmission point satisfies the first preset condition , determining the transmission point in the first set of candidate transmission points that has the smallest total interference to the macro base station and each active uplink transmission point as the selected downlink transmission point; and when there are at least two in the first set of candidate transmission points that are identical to the When the macro base station and the transmission point whose coupling loss or path loss meets the first preset condition with the active uplink transmission point, the macro base station and each transmission point satisfying the first preset condition in the first candidate transmission point set The transmission point with the smallest interference sum of active uplink transmission points is determined as the selected downlink transmission point.

Supplement 7. The device according to Supplement 1, wherein the selection unit includes:

A fourth determining unit, the fourth determining unit is configured to determine at least two idle transmission points with smaller coupling losses with the user equipment having uplink transmission requirements as a second set of candidate transmission points;

A removing unit, the removing unit is configured to remove a transmission point having the same precoding matrix index as the currently scheduled downlink user equipment from the second set of candidate transmission points, to obtain a third set of candidate transmission points;

A fifth determining unit, configured to determine a transmission point whose coupling loss or path loss with the downlink transmission point in the third set of candidate transmission points satisfies a second preset condition as the selected uplink transmission point.

Supplement 8. The device according to Supplement 7, wherein,

The removing unit is further configured to remove, from the second set of candidate transmission points, a transmission point having the same precoding matrix index as that of the user equipment served by the macro base station of the neighboring cell.

Supplement 9. The device according to Supplement 7, wherein the selection unit further includes:

A sixth determining unit, the sixth determining unit is configured to receive the second set of candidate transmission points when the number of remaining transmission points after removing the transmission points having the same precoding matrix index as the currently scheduled downlink user equipment in the second set of candidate transmission points is 0 The transmission point with the least interference of the macro base station in the current macro cell is determined as the third set of candidate transmission points; and/or

A seventh determining unit, the seventh determining unit is configured to select the third candidate transmission point when there is no transmission point whose coupling loss or path loss with the downlink transmission point satisfies the second preset condition in the third candidate transmission point set The transmission point in the set that is subjected to the smallest sum of interference from all downlink transmission points is used as the selected uplink transmission point; and when there are at least two coupling losses or path losses with the downlink transmission points in the third set of candidate transmission points satisfying the second preset condition When the transmission point is selected, among the transmission points satisfying the second preset condition in the third candidate transmission point set, the transmission point that is subjected to the smallest sum of interference from all downlink transmission points is used as the selected uplink transmission point.

Supplement 10. The device according to Supplement 7, wherein the selection unit further includes:

A precoding unit, configured to perform multi-user precoding on the selected uplink transmission point determined by the fifth determining unit.

Supplement 11. A base station, including the device according to Supplement 1.

Supplementary note 12. A scheduling method for a communication system, the method comprising:

When the current subframe is an uplink subframe, schedule uplink user equipment; when the current subframe is a downlink subframe, schedule downlink user equipment;

When the current subframe is an uplink subframe, select a downlink transmission point for downlink transmission of the user equipment in the uplink subframe that has a downlink transmission requirement; when the current subframe is a downlink subframe, select An uplink transmission point for performing uplink transmission on the user equipment having an uplink transmission requirement in the downlink subframe;

When the performance of the communication system is enhanced when the user equipment with downlink transmission requirements is scheduled to perform downlink transmission through the selected downlink transmission point while scheduling the uplink user equipment, schedule the user equipment with downlink transmission requirements The user equipment performs downlink transmission through the selected downlink transmission point; when scheduling the downlink user equipment and scheduling the user equipment with uplink transmission requirements to perform uplink transmission through the selected uplink transmission point, the communication system In the case of enhanced performance, schedule the user equipment with uplink transmission requirements to perform uplink transmission through the selected uplink transmission point.

Supplement 13. The method according to Supplement 12, wherein the method further includes:

When there is a user equipment with a cache greater than the preset threshold in the user equipment with downlink transmission requirements, select a downlink transmission point to perform a user equipment with a buffer greater than the preset threshold among the user equipment with downlink transmission requirements downlink transmission;

When there is a user equipment with a buffer greater than the preset threshold in the user equipment with uplink transmission requirements, select an uplink transmission point for users whose buffers are greater than the preset threshold among the user equipment with uplink transmission requirements The device performs uplink transmission.

Supplement 14. The method according to Supplement 12, wherein the method further includes:

In the case that the current subframe is an uplink subframe, according to at least one of transmission rate, spectrum efficiency and throughput, it is judged that when the uplink user equipment is scheduled and the user equipment with downlink transmission requirements is scheduled at the same time, the selected Whether the performance of the communication system is enhanced when the downlink transmission point performs downlink transmission;

In the case that the current subframe is a downlink subframe, according to at least one of transmission rate, spectrum efficiency and throughput, it is judged that when scheduling the downlink user equipment, the user equipment with uplink transmission requirements is scheduled to pass the selected Whether the performance of the communication system is enhanced when the uplink transmission point performs uplink transmission.

Supplement 15. The method according to Supplement 14, wherein, when scheduling the uplink user equipment while scheduling the uplink user equipment according to the transmission rate, the user equipment with downlink transmission needs is scheduled to perform downlink through the selected downlink transmission point Whether the performance of the communication system is enhanced during transmission, and judging according to the transmission rate when scheduling the downlink user equipment while scheduling the user equipment with uplink transmission requirements to perform uplink transmission through the selected uplink transmission point Whether the performance of the communication system described above has been enhanced, including:

estimating user equipment to user equipment interference;

Wherein, the estimating the user equipment to user equipment interference includes:

Calculate the distance from the interference source user equipment to the interfered user equipment according to the position of the active user equipment in the current macro cell;

Estimating the transmit power of the uplink user equipment according to the channel measurement results between the uplink user equipment and a possible uplink serving transmission point;

Estimating the power of the interference signal from the user equipment to the user equipment according to the path loss between the user equipments, the distance from the interference source user equipment to the interfered user equipment, and the transmission power of the uplink user equipment.

Supplementary Note 16. The method according to Supplementary Note 12, wherein the selection of the downlink transmission point used for downlink transmission to the user equipment having a downlink transmission requirement in the uplink subframe includes:

Determining at least two transmission points among the idle transmission points in the current macro cell that have relatively large coupling loss or path loss with the macro base station in the current macro cell, or that have relatively low received strength of the reference signal as a first set of candidate transmission points;

Setting the minimum transmission power value of each transmission point in the first set of candidate transmission points that enables the user equipment with downlink transmission requirements to normally perform downlink transmission;

According to the minimum transmit power value, a transmission point in the first set of candidate transmission points whose coupling loss or path loss with the macro base station and with an active uplink transmission point satisfies a first preset condition is determined as the selected downlink transmission point.

Supplement 17. The method according to Supplement 16, wherein the selection of a downlink transmission point for downlink transmission of the user equipment having a downlink transmission requirement in the uplink subframe further includes:

When there is no transmission point in the first candidate transmission point set whose coupling loss or path loss with the macro base station and with the active uplink transmission point satisfies the first preset condition, the macro base station in the first candidate transmission point set The transmission point with the smallest sum of interference between the station and each active uplink transmission point is determined as the selected downlink transmission point; and when there are at least two coupling losses or paths with the macro base station and with the active uplink transmission point in the first set of candidate transmission points When the loss meets the transmission point of the first preset condition, determine the transmission point with the smallest total interference to the macro base station and each active uplink transmission point among the transmission points in the first set of candidate transmission points that meet the first preset condition as the selection downlink transmission point.

Supplement 18. The method according to Supplement 12, wherein the selecting an uplink transmission point for performing uplink transmission on a user equipment having an uplink transmission requirement in the downlink subframe includes:

Determining at least two transmission points with smaller coupling losses with the user equipment having uplink transmission requirements as a second set of candidate transmission points;

removing a transmission point having the same precoding matrix index as the currently scheduled downlink user equipment from the second set of candidate transmission points to obtain a third set of candidate transmission points;

A transmission point whose coupling loss or path loss with the downlink transmission point satisfies the second preset condition in the third set of candidate transmission points is determined as the selected uplink transmission point.

Supplement 19. The method according to Supplement 18, wherein the transmission point having the same precoding matrix index as the currently scheduled downlink user equipment is removed from the second set of candidate transmission points to obtain a third candidate transmission point Collection, also includes:

The transmission points having the same precoding matrix index as the user equipment served by the macro base station of the neighboring cell are removed from the second set of candidate transmission points.

Supplement 20. The method according to Supplement 18, wherein the selecting an uplink transmission point for performing uplink transmission on the user equipment having uplink transmission requirements in the downlink subframe further includes:

When the second candidate transmission point set removes the transmission point with the same precoding matrix index as the currently scheduled downlink user equipment, the number of remaining transmission points is 0, and the transmission point that is least interfered by the macro base station in the current macro cell is determined as a third set of candidate transmission points; and/or

When there is no transmission point whose coupling loss or path loss with the downlink transmission point satisfies the second preset condition in the third set of candidate transmission points, select the transmission point with the smallest sum of interference from all downlink transmission points in the third set of candidate transmission points As the selected uplink transmission point; and when there are at least two transmission points whose coupling loss or path loss with the downlink transmission point satisfies the second preset condition in the third candidate transmission point set, the third candidate transmission point set satisfies Among the transmission points of the second preset condition, the transmission point that is subjected to the smallest sum of interference from all downlink transmission points is used as the selected uplink transmission point.

Claims (10)

1. A scheduling apparatus for a communication system, the apparatus comprising:

the first scheduling unit is used for scheduling uplink user equipment under the condition that the current subframe is an uplink subframe; scheduling downlink user equipment under the condition that the current subframe is a downlink subframe;

the selection unit is used for selecting a downlink transmission point for performing downlink transmission on user equipment with downlink transmission requirements in an uplink subframe under the condition that the current subframe is the uplink subframe; selecting an uplink transmission point for performing uplink transmission on user equipment with uplink transmission requirements in a downlink subframe under the condition that the current subframe is the downlink subframe;

a second scheduling unit, configured to schedule the user equipment with the downlink transmission requirement to perform downlink transmission through the selected downlink transmission point when the performance of the communication system is enhanced when the user equipment with the downlink transmission requirement is scheduled to perform downlink transmission through the selected downlink transmission point while the uplink user equipment is scheduled; and under the condition that the performance of the communication system is enhanced when the user equipment with the uplink transmission requirement is scheduled to perform uplink transmission through the selected uplink transmission point while the downlink user equipment is scheduled, the user equipment with the uplink transmission requirement is scheduled to perform uplink transmission through the selected uplink transmission point.

2. The apparatus of claim 1, wherein the apparatus further comprises:

a third scheduling unit, configured to select a downlink transmission point to perform downlink transmission on a user equipment with a downlink transmission demand, where the user equipment with a buffer greater than a preset threshold exists in the user equipment with the downlink transmission demand; and when the user equipment with the uplink transmission requirement exists in the user equipment with the buffer larger than the preset threshold, selecting an uplink transmission point to perform uplink transmission on the user equipment with the uplink transmission requirement, of which the buffer is larger than the preset threshold.

3. The apparatus of claim 1, wherein the apparatus further comprises:

a determining unit, configured to determine, when a current subframe is an uplink subframe, whether performance of the communication system is enhanced when the user equipment having a downlink transmission requirement is scheduled to perform downlink transmission through the selected downlink transmission point while the uplink user equipment is scheduled according to at least one of a transmission rate, spectral efficiency, and throughput; and under the condition that the current subframe is a downlink subframe, judging whether the performance of the communication system is enhanced when the user equipment with the uplink transmission requirement is scheduled to carry out uplink transmission through the selected uplink transmission point while the downlink user equipment is scheduled according to at least one of transmission rate, spectrum efficiency and throughput.

4. The apparatus of claim 3, wherein the determining unit comprises:

a first estimation unit for estimating user equipment to user equipment interference;

wherein the first estimation unit includes:

the computing unit is used for computing the distance from the user equipment of the interference source to the interfered user equipment according to the position of the active user equipment in the current macro cell;

a second estimating unit, configured to estimate a transmit power of an uplink user equipment according to a channel measurement result between the uplink user equipment and a possible uplink service transmission point;

a third estimating unit, configured to estimate power of an interference signal from the user equipment to the user equipment according to a path loss between the user equipments, a distance from the interference source user equipment to the interfered user equipment, and the transmission power of the uplink user equipment.

5. The apparatus of claim 1, wherein the selection unit comprises:

a first determining unit, configured to determine, as a first candidate transmission point set, at least two transmission points with a larger coupling loss or a larger path loss or a smaller reference signal reception strength with a macro base station in a current macro cell among idle transmission points in the current macro cell;

a setting unit, configured to set a minimum sending power value of each transmission point in a first candidate transmission point set, where the minimum sending power value enables the ue with the downlink transmission requirement to normally perform downlink transmission;

a second determining unit, configured to determine, according to the minimum sending power value, a transmission point, in the first candidate transmission point set, for which coupling loss or path loss with the macro base station and with an active uplink transmission point meet a first preset condition, as the selected downlink transmission point.

6. The apparatus of claim 5, wherein the selection unit further comprises:

a third determining unit, configured to determine, when there is no transmission point in the first candidate transmission point set whose coupling loss or path loss with the macro base station and with the active uplink transmission point satisfies a first preset condition, a transmission point in the first candidate transmission point set whose total interference with the macro base station and each active uplink transmission point is minimum, as a selected downlink transmission point, and determine, when there are at least two transmission points in the first candidate transmission point set whose coupling loss or path loss with the macro base station and with the active uplink transmission point satisfies the first preset condition, a transmission point in the first candidate transmission point set whose total interference with the macro base station and each active uplink transmission point is minimum, as a selected downlink transmission point.

7. The apparatus according to claim 1 or 5, wherein the selection unit comprises:

a fourth determining unit, configured to determine, as a second candidate transmission point set, at least two idle transmission points with smaller coupling loss with the user equipment having the uplink transmission requirement;

a removing unit, configured to remove, from the second candidate transmission point set, a transmission point having the same precoding matrix index as that of a currently scheduled downlink user equipment, to obtain a third candidate transmission point set;

a fifth determining unit, configured to determine, as the selected uplink transmission point, a transmission point in the third candidate transmission point set where a coupling loss or a path loss with the downlink transmission point meets a second preset condition.

8. The apparatus of claim 7, wherein,

the removing unit is further configured to remove, from the second candidate transmission point set, transmission points having a same precoding matrix index as a user equipment served by the macro base station of the neighboring cell.

9. The apparatus of claim 7, wherein the selection unit further comprises:

a sixth determining unit, configured to determine, when the number of remaining transmission points after removing transmission points having the same precoding matrix index as that of currently scheduled downlink user equipment from the second candidate transmission point set is 0, a transmission point with minimum interference from a macro base station in a current macro cell as the third candidate transmission point set; and/or

A seventh determining unit, configured to, when there is no transmission point in the third candidate transmission point set where coupling loss or path loss with a downlink transmission point meets a second preset condition, use a transmission point in the third candidate transmission point set where a sum of interference from all downlink transmission points is minimum as a selected uplink transmission point; and when at least two transmission points whose coupling loss or path loss with the downlink transmission point meets the second preset condition exist in the third candidate transmission point set, taking the transmission point which is the minimum sum of interference from all downlink transmission points in the transmission points meeting the second preset condition in the third candidate transmission point set as the selected uplink transmission point.

10. A base station comprising the apparatus of any of claims 1-9.