CN101299839A - Method and apparatus for resource allocation and terminal access in time-division sharing channel - Google Patents

Abstract

Provided is a resource allocation and terminal access method in the time division sharing channel and a device thereof. In the invention, the system determines the corresponding superframe according to the structure of the frame, allocates the system using the superframe as the period for the terminal, and updates the resource allocation corresponding to the terminal using the superframe as the period, wherein the superframe includes one or a plurality of subframe(s) in the system. Moreover, the terminal accessed into the system performs the synchronization (including a physical layer synchronization and a MAC layer synchronization) and communication with the station using the superframe as the period. Therefore, the invention provides the backward compatible resource allocation aiming at the terminal of the disturbed wireless system, simplifies the process of the terminal and effectively reduces the implement complexity of the terminal.

Description

Resource allocation and terminal access method and device in time-division shared channel

technical field

The invention relates to the technical field of wireless communication, in particular to a resource allocation and terminal access technology in a time-division shared channel.

Background technique

In a wireless communication system, a wireless device supporting cognitive wireless technology can improve the utilization rate of the wireless spectrum, especially the spectrum utilization rate of the licensed frequency band. The wireless device supporting the cognitive radio technology can dynamically perceive the surrounding environment, and adaptively and dynamically adjust its internal state according to the change of the environment, so as to effectively use the idle frequency spectrum and avoid interference to other systems.

At present, due to limited wireless spectrum resources and system planning reasons, there will be multiple wireless devices operating on the same channel, resulting in mutual interference between systems. To avoid interference, wireless devices operating on the same working channel need to coordinate with each other and share the same channel time-sharing. That is, within a certain period of time, one of the systems has a higher priority and can transmit with maximum power. This time is called the main subframe (or main frame) of the system, and the system is called the main system; Other systems using the same channel at the same time must reduce their transmission power or even go silent (stop sending) to avoid interference to the main system. This time is called the secondary subframe (or secondary frame) of this system.

In a wireless communication system, for services of terminals at the center of the base station that are not interfered by neighbors, each base station can transmit services related to these terminals at the same time to improve spectrum utilization. At this time, the subframes used are called common Subframe or shared subframe (also called shared frame).

Based on the above types of subframes, the currently used subframe allocation methods mainly include:

(1) Method 1

In this method, the subframe allocation method used is shown in Figure 1. Each frame starts from the common subframe C, and every N frames has a shared subframe SH. The length of the shared subframe can be 1 frame, so , the shared subframe is also called a shared frame. A main subframe is assigned to a system every N frames. This system is called the main system in the main subframe. During the main subframe, its neighbor systems reduce the transmission power (including silence) so as not to cause damage to the main subframe of the main system. Harmful interference, the subframe corresponding to this period is called the secondary subframe of its neighbor system. Wherein, the common subframe is only allocated with downlink resources and no uplink resources are allocated, while the main subframe and the shared subframe are allocated with both downlink resources and uplink resources.

(2) Method 2

In this method, the subframe allocation method used is shown in Figure 2, which is basically the same as the subframe allocation method of method (1), the difference is only that: for the common subframes, both downlink resources and There are upstream resources.

(3) Method 3

In this method, the subframe allocation method used is shown in Figure 3, which is basically the same as the subframe allocation method of method (1), the only difference is that there is no common subframe in this subframe allocation method, or the common subframe The length of the frame part is zero, and every N frame has a shared subframe, and each system allocates several subframes in every N frame as its main subframe; in this case, the lengths of the shared subframe and the main subframe are the frame The basic units, therefore, are also called shared frames and main frames, respectively.

In the traditional central control wireless communication system, the base station sends a fixed pilot sequence Preamble at the frame header of each frame for terminal synchronization and timing, followed by MAP (Physical Resource Mapping) signaling information ; Wherein, the signaling information will include the physical information of the downlink and/or uplink burst (burst) transmitted by the frame, for example, the modulation method, the encoding method, the number of starting symbols of Burst, and the number of ending symbols of Burst wait.

However, under the time-division shared channel structure shown in Fig. 1, Fig. 2 and Fig. 3, for a terminal in a non-interference area, it can receive the Preamble and signaling through the common subframe, but for a terminal in multiple The terminals in the common coverage area of the system (that is, the interference area) cannot correctly receive the frame header Preamble and signaling of the base station in the common subframe due to interference from neighboring systems. The terminal sends the Preamble and signaling.

In this way, in order to meet the requirements of terminals in the interference area and in the non-interference area, the base station needs to send the Preamble and signaling in the main subframe, common subframe or shared subframe at the same time, which makes the terminal need to maintain two different The subframe header and two MAPs increase the implementation complexity of the terminal.

Contents of the invention

Embodiments of the present invention provide a method and device for resource allocation and terminal access in a time-division shared channel, thereby simplifying the processing process of the terminal and reducing the complexity of terminal implementation.

An embodiment of the present invention provides a resource allocation method in a time-division shared channel, including:

determining a superframe in a predetermined manner, the superframe including one or more subframes in the system;

Within a superframe period corresponding to each superframe, resources are allocated to terminals in the system.

An embodiment of the present invention provides a resource allocation device in a time-division shared channel, including:

a superframe period determining unit, configured to determine the superframe period in a predetermined manner;

A resource allocation unit, configured to allocate resources to terminals in the system within each superframe period;

The communication unit is configured to communicate with the terminal according to the resources allocated by the resource allocation unit for the terminal with the superframe period as a period.

An embodiment of the present invention provides a method for terminal access in a time-division shared channel, including:

Perform downlink physical layer synchronization according to the pilot sequence search results;

Select an access base station and an access subframe according to the received media access control MAC layer message corresponding to the synchronization subframe header, where the access subframe is a main subframe, or a common subframe or a shared subframe;

Obtain resource allocation information in each superframe period, and implement communication with the system according to the acquired resource allocation information, where the superframe includes one or more subframes in the system.

An embodiment of the present invention provides a device for terminal access in a time-division shared channel, including:

a synchronization processing unit, configured to perform downlink physical layer synchronization according to a pilot sequence search result;

The access base station and the subframe determination unit are used to select the access base station and the access subframe according to the MAC layer message corresponding to the received synchronization subframe header after the synchronization processing unit realizes synchronization, and the access subframe is the main subframe The frame, or, is a common subframe or a shared subframe;

The communication processing unit is configured to acquire resource allocation information in each superframe period, and realize communication with the system according to the acquired resource allocation information, and the superframe includes one or more subframes in the system.

An embodiment of the present invention provides a terminal, in which the device for terminal access in a time-division shared channel is set.

It can be seen from the technical solutions provided by the above embodiments of the present invention that in the embodiments of the present invention, the system determines the corresponding superframe according to the frame structure, allocates resources for the terminal with the superframe as the cycle, and updates the corresponding frame with the superframe as the cycle. Resource allocation of the terminal; moreover, the terminal synchronizes and communicates with the base station in a superframe period. Therefore, the realization of the embodiment of the present invention makes the terminal only need to maintain one subframe header and MAP, which simplifies the processing of the terminal, thereby effectively reducing the design complexity of the terminal.

Description of drawings

FIG. 1 is a first schematic diagram of a time-sharing frame structure in the prior art;

Fig. 2 is a schematic diagram 2 of a time-sharing frame structure in the prior art;

Fig. 3 is a schematic diagram three of the time-sharing frame structure in the prior art;

FIG. 4 is a schematic diagram of a terminal access processing process provided by an embodiment of the present invention;

5 is a first schematic diagram of downlink synchronization correlation peaks based on the OFDM physical layer in an embodiment of the present invention;

6 is a second schematic diagram of downlink synchronization correlation peaks based on the OFDM physical layer in an embodiment of the present invention;

FIG. 7 is a third schematic diagram of downlink synchronization correlation peaks based on the OFDM physical layer in an embodiment of the present invention;

FIG. 8 is a fourth schematic diagram of downlink synchronization correlation peaks based on the OFDM physical layer in an embodiment of the present invention;

FIG. 9 is a first schematic diagram of downlink synchronization correlation peaks based on the OFDMA physical layer in an embodiment of the present invention;

10 is a second schematic diagram of downlink synchronization correlation peaks based on the OFDMA physical layer in an embodiment of the present invention;

Fig. 11 is a structural schematic diagram 1 of the device provided by the embodiment of the present invention;

Fig. 12 is a second structural schematic diagram of the device provided by the embodiment of the present invention.

Detailed ways

In the embodiment of the present invention, the system determines the corresponding superframe according to the frame structure, allocates resources for the terminal with the superframe as the period, and updates the resource allocation of the corresponding terminal with the superframe as the period. The terminal synchronizes with the base station (including physical layer synchronization and MAC layer synchronization) and communicates with the base station in a superframe cycle, thereby reducing the processing and implementation complexity of the terminal in the time sharing channel system.

Specifically, in the embodiment of the present invention, on the system side, the system first needs to determine the main frame superframe and the shared frame superframe according to the corresponding subframe structure, and for terminals connected to the main subframe, use the main frame superframe The frame period is used to allocate resources for the frame period, and the information of the terminals connected to the main subframe is updated with the main frame superframe period as the frame period, such as MAP messages, etc.; for the terminals connected to the common subframe or shared subframe, the shared frame The superframe period allocates resources for the frame period, and uses the shared frame superframe period as the frame period to allocate resources for terminals accessing the common subframe or the shared subframe, that is, uses the shared frame superframe period as the frame period to update access to the common subframe. Information about the frame or terminals sharing the subframe, such as MAP information. On the terminal side, the terminal communicates with the base station at the period of the main frame superframe period, or communicates with the base station at the period of the shared frame superframe period; that is, the terminal maintains synchronization with the base station at the physical layer and the MAC layer at the period of the main frame superframe period. Alternatively, the synchronization between the physical layer and the MAC layer is maintained with the base station by taking the shared frame superframe period as a period.

Wherein, each superframe of the main frame superframe starts from the header of the main subframe, and the period of the main frame superframe is the distance between the header of a main subframe of the same system and the header of the next main subframe, that is, the same system The product of the number of frames between two consecutive primary subframes and the actual frame period (that is, the subframe period). Shared frame superframe Each superframe starts from the header of a shared subframe or common subframe, and the period of a shared frame superframe is from one shared subframe or common subframe header to the next shared subframe or common subframe in the same system The distance between frame headers, that is, the product of the number of frames between two consecutive shared or common subframes of the same system and the actual frame period.

Assuming that the actual frame period is Td, and the number of frames separated between two consecutive main subframes in the same system is L, and the number of frames separated between two consecutive shared subframes or common subframes is M, then the main frame The period is equal to L×Td, and the common frame period is equal to M×Td.

Specifically, for the current frame structure form, several methods for determining the superframe period of the main frame and the superframe period of the shared frame are given below.

(1) When there is a common subframe

Referring to Figures 1 and 2, the subframe structure includes common subframes, that is, the frame header of each frame has common or shared subframes, then the superframe period is:

The shared frame superframe period is M×Td, M=1, then the shared frame superframe period is equal to the actual frame period, that is, equal to Td;

The main frame super frame period is N×Td;

(2) When there is no common subframe

Referring to Figure 3, if the subframe structure does not include common subframes, then the main frame superframe period is equal to the shared frame superframe period and both are equal to L×Td;

Based on the above case, in the embodiment of the present invention, for a terminal in the interference area, it can only access the main subframe, the system will allocate resources to the terminal in the interference area with the main frame superframe period as the frame period, and use The main frame superframe period is a frame period update information message of a terminal accessing the main subframe, such as a MAP message. For a terminal in a non-interference area, it can access either the main subframe, the common subframe or the shared subframe, and the terminal in the non-interference area can choose to access the main subframe or the common subframe. subframe or shared subframe, the system can further require the terminal to access the main subframe or access the common subframe or shared subframe by setting. The system will allocate resources to the terminals in the interference area and access the main subframe with the main frame superframe period as the frame period, and update the information messages of the terminals connected to the main subframe with the main frame superframe period as the frame period, such as MAP information. The system will allocate resources to the terminals in the interference area and access the common subframe or shared subframe with the shared frame superframe period as the frame period, and update the access to the shared or common subframe with the shared frame superframe period as the frame period Information message of the terminal, such as MAP message.

It should be noted that, in this embodiment, for a terminal in the non-interference zone, the base station may also request the terminal in the non-interference zone to access a specific subframe through signaling according to the current service bearer situation, for example, if the current If the traffic carried by the common subframe or shared subframe of the base station is large, the terminal in the non-interference area can be required to access the main subframe; or, if the traffic carried by the main subframe of the current base station is large, the terminal in the non-interference area can be required to access into common subframes or shared subframes.

Wherein, the system may be a base station, or other devices with similar functions; the service system may be a serving base station, or other devices with similar functions for providing services for the current terminal .

In the specific application process of the embodiment of the present invention, the resource information allocated by the system can be transmitted to the terminal through the MAP field in the subframe. The MAP sent by the base station in the main subframe is updated with the main frame superframe period as the frame period. The base station The MAP sent in the common subframe or the shared subframe is updated with the shared frame superframe period as the frame period, and in the MAP field of the main subframe of the system, the MAP information related to the terminal connected to the main subframe is transmitted; in the system In the MAP field of the common subframe and the shared subframe, the MAP information of the terminal accessing the common subframe or the shared subframe is transmitted, so as to reduce the amount of MAP information that the terminal needs to process, thereby further simplifying the processing process of the terminal.

During the process of accessing the wireless communication network and carrying out communication services, the terminal needs to obtain the corresponding frame period information. In the embodiment of the present invention, specifically, the corresponding main frame superframe period or common frame superframe period may be carried in the MAP message as Corresponding frame cycle information.

In the embodiment of the present invention, other broadcast messages transmitted by the system in common subframes and/or shared subframes, such as messages such as DCD (downlink channel description) and UCD (uplink channel description), are different from those transmitted by the system in main subframes. Messages such as DCD and UCD may be the same or different.

In order to facilitate the understanding of the embodiments of the present invention, the following will describe the processing process of a terminal accessing a network under a time-division shared channel to carry out communication services with reference to the accompanying drawings.

Based on the above-mentioned resource allocation method, the processing process of the terminal initially accessing the network and carrying out communication services is shown in Figure 4, which specifically includes the following steps:

Step 1. The terminal first searches for the Preamble (pilot sequence) in the downlink subframe header. Specifically, it can search for: the Preamble of the main subframe, and the Preamble of the common subframe or shared subframe. According to the searched Preamble, the downlink physical layer synchronization;

In the process of downlink physical layer synchronization, the terminal can further use the characteristics of the Preamble sequence to obtain some prior information for non-coherent accumulation and improve synchronization accuracy;

Assuming that the analysis of the frame structure of the shared channel is repeated every N frames (in FIG. 1, FIG. 2 and FIG. 3, N=4), the prior information can be: if there is a common subframe, then every Td will receive A common subframe header, at least (N+1) subframe headers will be received every N×Td; if there is no common subframe, two shared subframe headers will be received every N×Td;

The synchronization process is described below by taking two different systems as an example:

(1) OFDM (Orthogonal Frequency Division Multiplexing)

In the physical layer based on OFDM, each base station sends the same Preamble sequence. At this time, the following two situations can be specifically included:

Case 1: There is a common subframe

If the terminal is in the non-interference zone, as shown in Figure 5, the terminal will receive (N+1) Preamble sequences within N×Td, wherein, every Td will receive a Preamble sequence, and another Preamble sequence The interval with one of the N Preamble sequences is the frame offset between the common subframe and the main subframe, and this Preamble appears every N×Td time;

If the terminal is in the interference area, as shown in Figure 6, the terminal will receive 2×N Preamble sequences within N×Td time, and these 2×N Preamble sequences can be divided into two types (common subframe header and main subframe header) frame header), the interval between two consecutive preamble sequences of each type is the frame period Td, and the interval between the two types of preamble sequences is the frame offset between the common subframe and the main subframe.

Case 2: No common subframe

If the terminal is in the non-interference zone, as shown in FIG. 7, two preamble sequences are received every other superframe period, and the interval between the two preamble sequences is an integer multiple of the frame period.

If the terminal is in the interference zone, as shown in FIG. 8 , it will receive a Preamble sequence every other frame period.

(2) OFDMA (Orthogonal Frequency Division Multiplexing Access)

In the OFDMA-based physical layer, each base station sends a different Preamble sequence. At this time, the following two situations can also be specifically included:

Case 1: There is a common subframe

As shown in FIG. 9 , the terminal receives a Preamble sequence (common subframe header) every Td, and at the same time, within a superframe, also receives a Preamble sequence (main subframe header).

Case 2: There is no common subframe

As shown in FIG. 10 , the terminal receives two Preamble sequences (common subframe header and main subframe header) in each superframe.

The synchronization of the physical layer can be realized according to the received Preamble in the above situations.

Step 2, after obtaining the synchronization of the physical layer, the terminal can receive the MAC layer message corresponding to each synchronized subframe header (ie, the synchronization subframe header), and determine the access base station and the access subframe;

The terminal can also search for a Preamble sequence, if the correlation peak between the Preamble sequence and the local sequence is greater than a specific threshold, then decode the MAC layer message after the corresponding frame header;

The terminal records the result of decoding the MAC layer message behind each subframe header within the period Ts (Ts is taken as N×Td, and Td is the frame period): if it can be decoded correctly, record the MAC layer message behind each subframe header The corresponding BSID (base station identification) and the signal quality of the received signal, such as SNR (signal-to-noise ratio); if it cannot be decoded correctly, it waits for the next subframe header to be decoded.

In this step, the terminal determines the access base station and the access subframe, and further determines the specific implementation of the subframe type may be as follows:

If the MAC layer message is only correctly decoded once in every N frames, then the BSID that sends this MAC message is obtained from the MAC layer message, and the base station corresponding to the BSID is selected as the access base station, and the subframe before the MAC layer message The frame header is used as the main subframe;

If the number of correctly decoded MAC layer messages is greater than 1 in every N frames, it includes:

(1) If in each N frame, each MAC layer message that can be decoded correctly corresponds to a different base station, and in a superframe, the BSID of each base station has the same number of occurrences, and the terminal is located in the interference area at this time, then select The signal quality is the best, for example, the base station corresponding to the burst with the largest SNR (signal-to-noise ratio) value is the access base station, and the corresponding subframe (ie, the main subframe) is the access subframe;

(2) If in every N frames, each MAC layer message that can be correctly decoded corresponds to the same base station, and the terminal is located in the non-interference area at this time, then select the base station as the access base station, and further, preferably the common subframe or The shared subframe is used as the access subframe, or, further preferably, the subframe with the best signal quality, for example, the largest signal-to-noise ratio (including common subframes or shared subframes or primary subframes) is used as the access subframe;

(3) If in each frame, each MAC layer message that can be decoded correctly comes from different base stations, and the terminal is located in the interference area at this time, then select the base station with the most occurrences of the same BSID as the access base station, preferably the base station of the base station The primary subframe is used as the access subframe, or the primary subframe with the best signal quality, for example, the burst signal-to-noise ratio is the largest, is further preferably used as the access subframe.

In the above (2) and (3), it can be determined according to the information unit in the MAC layer message that the corresponding subframe type is a main subframe or a common subframe or a shared subframe; or, it can also be judged that within the Ts time, if Interval Td or an integer multiple of Td, get the same BSID, then the corresponding subframe header is the common subframe header; or, it can also be determined by combining the frame offset between the common subframe and the main subframe, if two Preamble The offset between the sequences is equal to the frame offset between the common subframe and the main subframe, then the previous subframe is the common subframe, and the subsequent subframe is the main subframe.

Step 3, the terminal receives the uplink UCD and UL-MAP (uplink MAP) of the access subframe issued by the selected access base station in the access subframe, and obtains the corresponding uplink ranging (ranging) resources, and in the selected access subframe The subframe is connected to the base station;

Since the base station only allocates uplink and downlink resources for terminals in the interference zone in the main subframe; allocates uplink and downlink resources for terminals in the non-interference zone only in common subframes or shared subframes; therefore, the terminal can only access in the main subframe, Or, access in a common subframe or a shared subframe;

Step 4, the terminal communicates with the base station within the selected subframe, using the superframe as the frame period;

According to the processing of step 3, in this step: for the terminal accessing the main subframe, communicate with the service system with the main frame superframe period as the frame period; for the terminal accessing the shared subframe or common subframe, use the The shared frame superframe period communicates with the serving system for the frame period.

Further, for a terminal accessing the main subframe, it will receive the MAP information sent by the main subframe, and update its own resource configuration according to the information; for a terminal accessing the shared subframe or common subframe, it will receive the common subframe frame or shared subframe to deliver MAP information, and update its own resource configuration based on the information.

In the embodiment of the present invention, the system side needs to send resource allocation information (such as MAP information) to the terminal, and the corresponding way of sending resource allocation information can be:

The resource allocation information issued in the primary subframe includes: resource allocation information of the primary subframe, resource allocation information of the common subframe or shared subframe, and at least one item of resource allocation information of the auxiliary primary subframe; correspondingly, the terminal On the side, the resource allocation information that can be obtained from the primary subframe includes: resource allocation information of the primary subframe, resource allocation information of the common subframe or shared subframe, and at least one of resource allocation information of the secondary primary subframe;

The resource allocation information delivered in the common subframe or the shared subframe includes: at least one of resource allocation information of the primary subframe, resource allocation information of the common subframe or shared subframe, and resource allocation information of the auxiliary primary subframe; Correspondingly, on the terminal side, the resource allocation information that can be obtained from the common subframe or shared subframe includes: resource allocation information of the primary subframe, resource allocation information of the common subframe or shared subframe, and resources of the auxiliary primary subframe Assign at least one item of information.

In the process of delivering the resource allocation information on the system side, it may specifically be delivered through the main subframe, and/or, the common subframe or the shared subframe.

During the process of selecting the resource allocation information delivery mode and resource allocation mode on the system side, the resource allocation and resource allocation information delivery may be performed according to the negotiation result with the terminal side.

Furthermore, for terminals accessing the main subframe, they will receive broadcast information such as DCD and UCD issued by the main subframe, and update their own channel description information according to the information; for terminals accessing the shared subframe or common subframe , will receive the DCD and UCD information issued by the common subframe or shared subframe, and update its own channel description information according to the information.

The embodiment of the present invention also provides a device for resource allocation in a time-division shared channel, the specific implementation structure of which is shown in Figure 11 and Figure 12, the device is set on the network side, specifically can be set in equipment such as a base station, and the device Specifically, it may include a superframe period determination unit, a resource allocation unit, and a communication processing unit, wherein:

The superframe period determination unit is used to determine the superframe period in a predetermined manner, specifically, it can be used to determine the superframe period of the main frame superframe and the shared frame superframe in a predetermined manner, and the main frame superframe Each superframe starts from the frame header of the main subframe, and each superframe of the shared frame superframe starts from the frame header of the shared subframe or the frame header of the common subframe;

The resource allocation unit is configured to allocate resources to terminals in the system within each superframe period, and specifically can be used to allocate resources to terminals in the system within each superframe period corresponding to the main frame superframe or shared frame superframe. The terminal accessing the main frame superframe or accessing the shared frame superframe performs resource allocation, and the shared frame superframe includes shared subframes or common subframes.

The communication processing unit is configured to use the superframe period as the period to communicate with the terminal according to the resources allocated by the resource allocation unit for the terminal. Specifically, it can be used to use the main frame superframe period as the period, or the shared frame superframe period as the period For the cycle, communicate with the terminal.

Referring to Figure 12, the application embodiment of the device may specifically include:

(1) The unit used to perform resource allocation processing for terminals accessing the main subframe includes a main frame superframe period determination unit, a main frame superframe MAP information processing unit, and a main frame superframe resource allocation processing unit, wherein:

(1) Main frame super frame period determination unit

This unit is specifically used to determine that the superframe period of the terminal in the interference zone is the interval between two consecutive main subframes of the same system, that is, the number of frames L between two consecutive main subframes in the same system and the actual frame period Td The product, that is, the superframe period Ts is taken as L×Td, and Td is the frame period, and the determined superframe period is provided to the main frame superframe MAP information processing unit;

(2) Main frame super frame MAP information processing unit

This unit is specifically used to determine the MAP information related to the terminal accessing the main subframe, and send it through the communication processing unit, so that in the MAP of the main subframe, the MAP information related to the terminal accessing the main subframe For the terminal, the MAP information may include the superframe period determined by the main frame superframe period determination unit;

(3) Main frame super frame resource allocation unit

The unit is specifically configured to allocate communication resources for terminals accessing the main subframe at the main frame superframe period, and send resource allocation information to the main frame superframe MAP information processing unit.

(2) The unit used to perform resource allocation processing on terminals accessing common subframes or shared subframes includes a shared frame superframe period determination unit, a shared frame superframe MAP information processing unit, and a shared frame superframe resource allocation processing unit ,in:

(1) Shared frame super frame period determination unit

This unit is specifically used to determine the superframe period of the terminal accessing the common subframe or shared subframe, and the superframe period is equal to the interval between two consecutive shared subframes or common subframes of the same system, specifically , when there is a common subframe, the superframe period can be determined as the actual frame period, and when there is no common subframe, the superframe period can be determined as between two consecutive shared subframes or common subframes in the same system The product of the number of frames at intervals and the actual frame period, after that, the determined superframe period is provided to the shared frame superframe MAP information processing unit;

(2) shared frame superframe MAP information processing unit

The unit is specifically configured to determine information related to terminals accessing a shared subframe or a common subframe, and send it through the communication processing unit, so as to send the access information in the common subframe or shared subframe MAP information related to the shared subframe or common subframe is sent to the terminal, and the MAP information may include the superframe period determined by the shared frame superframe period determination unit;

(3) Shared frame superframe resource allocation unit

The unit is specifically configured to allocate resources for communication to terminals accessing shared subframes or common subframes on a shared frame superframe cycle, and send the resource allocation information to the shared frame superframe MAP information processing unit.

The embodiment of the present invention also provides a device for terminal access in a time-division shared channel. The device can be installed in a terminal or in other devices that need to implement similar functions. The specific implementation structure is still shown in Figure 11. May include the following units:

(1) Synchronization processing unit

This unit can specifically be used to perform downlink physical layer synchronization according to the pilot sequence search result; the specific implementation of the function of this unit has been described above, so it will not be described in detail here;

(2) access base station and subframe determination unit

This unit can specifically be used to select an access base station and an access subframe according to the received MAC layer message corresponding to the synchronization subframe header after the synchronization processing unit implements synchronization, and the access subframe is the main subframe, or, is a common subframe or a shared subframe;

As shown in Figure 12, the access base station and subframe determination unit may specifically include the following units:

The MAC layer decoding unit is used to demodulate the downlink MAC layer data, and identify the number of times the MAC layer message is correctly decoded within the demodulated predetermined number of subframes, and further measure the signal-to-noise ratio of the data packet burst;

The first determination unit is configured to use the base station corresponding to the base station identifier in the MAC layer message as an access base station after the MAC layer decoding unit determines that the MAC layer message is correctly decoded once, and will send subtitles of the MAC layer message frame as the access main subframe;

The second determining unit is used to determine that each MAC layer message corresponds to different base stations after the MAC layer decoding unit determines multiple times of correct decoding, and the base station identifiers of each base station have the same number of occurrences, then select the best signal quality Well, for example, the base station with the largest burst signal-to-noise ratio is the access base station, and the corresponding main subframe is the access subframe;

The third determination unit is used to select the base station as the access base station if it is determined that each MAC layer message corresponds to the same base station after the MAC layer decoding unit has determined correct decoding multiple times, preferably a common subframe or a shared subframe As the access subframe, or preferably the subframe with the best signal quality, for example, the subframe with the largest signal-to-noise ratio as the access subframe;

The fourth determination unit is used to determine that each MAC layer message corresponds to a different base station after the MAC layer decoding unit determines multiple times of correct decoding, then: select the base station with the largest number of occurrences of the same base station identifier as the access base station, The primary subframe of the base station is preferably used as the access subframe; or, the primary subframe with the best signal quality, such as the largest signal-to-noise ratio, is selected as the access subframe in each base station, and the base station where the primary subframe is located is used as the access base station .

In order to meet the requirements of the third determination unit and the fourth determination unit by identifying the subframe type in the device, the device may further include a subframe type identification unit, which is used to identify the subframe type according to the MAC layer message The information unit determines the subframe type as a main subframe or a common subframe or a shared subframe; or, it is used to identify the interval subframe period or an integer multiple of the subframe period within a predetermined number of subframes, and decode to obtain the same base station identifier, Then the corresponding subframe header is a common subframe header or a shared subframe header; or, the offset between the two pilot sequences obtained for identification and decoding is equal to the frame offset between the common subframe and the main subframe, then The previous subframe is a common subframe, and the subsequent subframe is a primary subframe; and the identified subframe type is provided to the third determining unit and the fourth determining unit.

(3) Communication processing unit

Perform communication processing according to the determination result of the access subframe determination unit, which can be specifically used to: acquire resource allocation information in each main frame superframe period or shared frame superframe period, and realize communication with the system according to the resource allocation information Communication, the starting frame of the main frame superframe is the main subframe, the frame header is the main subframe frame header, the starting frame of the shared frame superframe is a shared subframe or a common subframe, and the frame header is a shared subframe or Common subframe header;

Wherein, the communication processing unit may specifically include the following units:

The main frame superframe MAP processing unit is used to receive the MAP signaling issued by the main subframe of the service system when the terminal accesses the main subframe, and obtain the resource allocation situation in the superframe;

The main frame superframe communication unit is used to communicate with the service system in the main subframe of the current service system according to the resource allocation obtained by the main frame superframe MAP processing unit when the terminal accesses the main subframe;

The shared frame superframe MAP processing unit is used to receive the MAP signaling issued by the public subframe or shared subframe of the service system when the terminal accesses the public subframe or shared subframe, and obtain the resource allocation in the superframe Condition;

The shared frame superframe communication unit is used to, when the terminal accesses the shared subframe or public subframe, according to the resource allocation obtained by the shared frame superframe MAP processing unit, in the public subframe or shared subframe of the current service system Frames communicate with the service system.

In this way, when the terminal is in the interference zone, it can only access through the main subframe, and communicate with the serving system only in the main subframe of the current serving system; when the terminal is in the non-interference zone, it can use the main subframe or common subframe Or a shared subframe, and communicate with the serving system only in the main subframe of the current serving system, or in a common subframe or a shared subframe.

To sum up, in the embodiment of the present invention, the system uses the superframe as the period to allocate resources for the terminal, and uses the superframe as the period to update the resource allocation of the corresponding terminal, and the terminal uses the superframe as the period to synchronize with the base station (including the physical layer Synchronization and MAC layer synchronization) and communication, therefore, the implementation of the embodiment of the present invention can overcome the problems existing in the prior art, and provide backward compatible resource allocation for the terminal of the interfered wireless system, effectively reducing the processing process of the terminal , thereby reducing the design complexity of the terminal.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (22)

1. A resource allocation method in a time-division shared channel, characterized in that, comprising: determining a superframe in a predetermined manner, the superframe including one or more subframes in the system; Within a superframe period corresponding to each superframe, resources are allocated to terminals in the system. 2. The method according to claim 1, wherein the superframes include a shared main frame superframe and/or a main frame superframe, and each superframe of the main frame superframe starts from the main subframe The frame header of the frame, the corresponding main frame superframe period is the interval between two adjacent main subframe frame headers in the same system; each superframe of the shared frame superframe starts from a shared subframe or common The frame header of the subframe, and the corresponding shared frame superframe period is the interval between the headers of two adjacent shared subframes or common subframes in the same system. 3. The method according to claim 2, wherein the step of allocating resources to terminals in the system specifically comprises: Taking the period of the superframe of the main frame as a period, allocate resources for communication to terminals accessing the main subframe; or, taking the period of the superframe of the shared frame as a period, allocate resources for terminals accessing the shared subframe and/or common subframe Resources for communication. 4. The method according to claim 2 or 3, characterized in that the process of allocating resources to terminals in the system further includes: In the superframe header of the main frame superframe, the physical resource mapping MAP information is sent to the terminal connected to the main subframe, and the frame period information carried in the MAP message of the main subframe is the main frame superframe period; or, In the superframe header of the shared frame superframe, the physical resource mapping MAP information is issued to the terminal accessing the shared subframe or the common subframe. In the MAP message of the common subframe or the shared subframe, the frame period information carried is Shared frame superframe period. 5. The method according to claim 2 or 3, further comprising: For a terminal in the non-interference zone, the base station instructs the terminal in the non-interference zone to access the main subframe, or to access the common subframe or the shared subframe through signaling. 6. The method according to claim 2 or 3, wherein the process of allocating resources to terminals in the system further includes: The downlink channel description DCD and uplink channel description UCD messages transmitted by the system in common subframes and/or shared subframes are the same as or different from the DCD and UCD messages transmitted by the system in main subframes. 7. A resource allocation device in a time-division shared channel, characterized in that it comprises: a superframe period determining unit, configured to determine the superframe period in a predetermined manner; A resource allocation unit, configured to allocate resources to terminals in the system within each superframe period; The communication unit is configured to communicate with the terminal according to the resources allocated by the resource allocation unit for the terminal with the superframe period as a period. 8. The device according to claim 7, wherein the superframe period determining unit specifically comprises: The main frame superframe period determination unit is used to determine the superframe period of the main frame superframe as the interval between two consecutive main subframe headers in the same system, and the main frame superframe starts from the header of the main subframe; A shared frame superframe period determination unit, configured to determine that the shared frame superframe period is the interval between two adjacent shared subframes and or common subframe headers in the same system, and the shared frame superframe starts at Frame header of shared subframe or common subframe. 9. The device according to claim 8, wherein the resource allocation unit comprises: The main frame superframe resource allocation unit is configured to use the main frame superframe period as a period to allocate resources for communication to the terminal accessing the main subframe; The shared frame superframe resource allocation unit is configured to allocate communication resources for terminals accessing the shared subframe or the common subframe with the period of the shared frame superframe as a period. 10. The device according to claim 9, further comprising: The main frame superframe MAP information processing unit is used to determine the relevant information of the terminal connected to the main subframe according to the resource allocation scheme of the main frame superframe resource allocation unit and the main frame superframe period determined by the main frame superframe period determination unit MAP information, and sent through the communication unit; The shared frame superframe MAP information processing unit is used to determine whether to access the shared subframe or the common The information related to the terminal of the subframe is sent through the communication unit. 11. A method for terminal access in a time-division shared channel, comprising: Perform downlink physical layer synchronization according to the pilot sequence search results; Select an access base station and an access subframe according to the received media access control MAC layer message corresponding to the synchronization subframe header, where the access subframe is a main subframe, or a common subframe or a shared subframe; Obtain resource allocation information in each superframe period, and implement communication with the system according to the acquired resource allocation information, where the superframe includes one or more subframes in the system. 12. The method according to claim 11, wherein the step of selecting access base stations and access subframes specifically comprises: If the MAC layer message is only correctly decoded once in every N frames, then the base station corresponding to the base station identifier in the MAC layer message is used as the access base station, and the subframe for transmitting the MAC layer message is used as the access subframe. The frame is the main subframe, wherein N frames are the repetition period of the frame structure of the time-division shared channel; If within each N frame, the number of times of correctly decoding the MAC layer message is multiple times, then: If the MAC layer messages that have been correctly decoded multiple times correspond to different base stations respectively, and the base station identifiers of each base station have the same number of occurrences, then select the base station with the best signal quality as the access base station, and the corresponding subframe is the access subframe, The subframe is the main subframe; If the MAC layer messages that have been correctly decoded multiple times correspond to the same base station, select the base station as the access base station, and select the common subframe or the shared subframe as the access subframe, or choose the subframe with the best quality. frame as an access subframe; If the MAC layer messages that have been correctly decoded multiple times come from different base stations, then select the base station with the most occurrences of the same base station identifier as the access base station, preferably the main subframe of the base station as the access subframe, or preferably the best signal quality The main subframe of is used as the access subframe. 13. The method according to claim 11 or 12, further comprising: For a terminal in the non-interference zone, it selects and determines access to the main subframe, or access to the common subframe or the shared subframe by receiving the signaling sent by the base station. 14. The method according to claim 11, characterized in that the method further comprises the step of judging the subframe type, and the step comprises: Determine the subframe type as the main subframe or common subframe or shared subframe according to the information element in the MAC layer message; or, Judging that in each N frame, the interval frame period or an integer multiple of the frame period is decoded to obtain the same base station identifier, then the corresponding subframe header is a common subframe header; or, It is judged that the offset between the two pilot sequences obtained by decoding is equal to the frame offset between the common subframe and the main subframe, then the previous subframe is the common subframe, and the subsequent subframe is the main subframe. 15. The method according to claim 11, 12 or 14, wherein the superframes include main frame superframes and/or shared frame superframes, and each superframe of the main frame superframes starts at The main subframe header, the corresponding main frame superframe period is the interval between two adjacent main subframe headers in the same system, and each superframe of the shared frame superframe starts at the frame as the shared subframe header or common subframe headers, and the corresponding shared frame superframe period is the interval between two adjacent shared subframes or common subframe headers in the same system. 16. The method according to claim 15, wherein the step of realizing communication with the system according to the acquired resource allocation information comprises: The terminal connected to the main subframe receives the downlink signal of the main subframe and sends the uplink signal in the main subframe within the superframe period corresponding to the main frame superframe; the terminal connected to the shared subframe or common subframe In the superframe period corresponding to the frame, the downlink signal of the shared subframe or the common subframe is received, and the uplink signal is sent in the shared subframe or the common subframe. 17. The method according to claim 16, characterized in that, after receiving the downlink signal of the main subframe, it further comprises: receiving the MAP signaling sent by the main subframe of the serving system, and obtaining the overlink signal in the main frame according to the MAP signaling. The resource allocation in the frame; after receiving the downlink signal of the shared subframe or common subframe, it also includes receiving the MAP signaling issued by the common subframe or shared subframe of the serving system, and obtaining the shared subframe according to the MAP signaling. Resource allocation within the frame superframe. 18. A device for terminal access in a time-division shared channel, characterized by comprising: a synchronization processing unit, configured to perform downlink physical layer synchronization according to a pilot sequence search result; The access base station and the subframe determination unit are used to select the access base station and the access subframe according to the MAC layer message corresponding to the received synchronization subframe header after the synchronization processing unit realizes synchronization, and the access subframe is the main subframe The frame, or, is a common subframe or a shared subframe; The communication processing unit is configured to acquire resource allocation information in each superframe period, and realize communication with the system according to the acquired resource allocation information, and the superframe includes one or more subframes in the system. 19. The device according to claim 18, wherein the access base station and the subframe determination unit specifically include: The MAC layer decoding unit is used to demodulate the downlink MAC layer data, and identify the number of times the MAC layer message is correctly decoded within the demodulation predetermined number of subframes, and measure the signal quality; The first determining unit is configured to, after the MAC layer decoding unit determines to correctly decode a MAC layer message, use the base station corresponding to the base station identifier in the MAC layer message as an access base station, and use the subframe before the MAC layer message The header is used as the access main subframe; The second determining unit is used to determine that each MAC layer message corresponds to different base stations after the MAC layer decoding unit determines multiple times of correct decoding, and the base station identifiers of each base station have the same number of occurrences, then select the best signal quality A good base station is an access base station, and the corresponding primary subframe is an access subframe; The third determination unit is used to select the base station as the access base station if it is determined that each MAC layer message corresponds to the same base station after the MAC layer decoding unit has determined correct decoding multiple times, preferably a common subframe or a shared subframe As an access subframe, or the subframe with the best quality is preferred as an access subframe; The fourth determination unit is used to select the base station with the largest number of occurrences of the same base station identifier as the access base station if it is determined that each MAC layer message corresponds to a different base station after the MAC layer decoding unit has determined multiple times of correct decoding, preferably The main subframe of the base station is used as the access subframe, or the main subframe with the best signal quality is preferably used as the access subframe. 20. The device according to claim 19, further comprising: The subframe type identification unit is used to determine the subframe type according to the information unit in the MAC layer message as the main subframe or common subframe or shared subframe; or, used to identify the interval between subframe periods or An integer multiple of the subframe period, if the same base station identifier is obtained by decoding, the corresponding subframe header is a common subframe header or a shared subframe header; or, it is used to identify the offset between the two pilot sequences obtained by decoding is equal to the frame offset between the common subframe and the main subframe, then the previous subframe is a common subframe, and the subsequent subframe is a main subframe; and the identified and determined subframe type is provided to the third determining unit and a fourth determination unit. 21. The device according to claim 18, 19 or 20, wherein the communication processing unit specifically includes: The main frame superframe MAP processing unit is used to receive the MAP signaling issued by the main subframe of the service system when the terminal accesses the main subframe, and obtain the resource allocation situation in the superframe; The main frame superframe communication unit is used to communicate with the service system in the main subframe of the current service system according to the resource allocation obtained by the main frame superframe MAP processing unit when the terminal accesses the main subframe; The shared frame superframe MAP processing unit is used to receive the MAP signaling issued by the public subframe or shared subframe of the service system when the terminal accesses the public subframe or shared subframe, and obtain the resource allocation in the superframe Condition; The shared frame superframe communication unit is used to, when the terminal accesses the shared subframe or public subframe, according to the resource allocation obtained by the shared frame superframe MAP processing unit, in the public subframe or shared subframe of the current service system Frames communicate with the service system. 22. A terminal, characterized in that the terminal is provided with a device for terminal access in a time-division shared channel according to any one of claims 18 to 21.

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