CN102316593A - Downlink resource allocation method and base station - Google Patents

Abstract

The invention discloses a downlink resource allocation method and a base station. Wherein, the downlink resource allocation method includes: the base station judges the frequency interference level of the terminal according to the parameter information reported by the terminal, wherein the parameter information includes: CINR, RSSI and the signal strength received by the terminal from neighboring cells; Allocating downlink resources to the terminal according to a preset strategy, wherein the preset strategy includes: not multiplexing the downlink resources allocated to terminals with the highest frequency interference level under different sectors of the base station. Through the present invention, it is possible to prevent the terminal at the border of the cell from being interfered by adjacent cells, thereby improving user experience.

Description

Downlink resource allocation method and base station

technical field

The present invention relates to the communication field, in particular, to a downlink resource allocation method and a base station.

Background technique

Orthogonal Frequency Division Multiplexing (OFDM) technology is a multi-carrier transmission technology, which is developed from Multi-Carrier Modulation (MCM) in a wireless environment. high-speed transmission technology. Most of the frequency response curves of wireless channels are non-flat. OFDM technology divides a given channel into many orthogonal sub-channels in the frequency domain, modulates each sub-carrier on each sub-channel, and transmits each sub-carrier in parallel.

The World Interoperability for Microwave Access (referred to as WiMAX) system adopts OFDM technology, and the frame structure of its Time Division Duplex (referred to as TDD) mode is shown in Figure 1. The frame structure is a two-dimensional structure , the horizontal axis is composed of symbols in the time domain, the vertical axis is composed of subcarriers in the frequency domain, and the transmit/receive transmission gap (Transmit/Receive TransitionGap, TTG for short) is the interval between pulses. As shown in FIG. 1 , a downlink subframe starts with a preamble, and the preamble is mainly used for physical layer synchronization and equalization. After the preamble is the frame control header (Frame Control Header, referred to as FCH). In addition, if there is a downlink mapping (DL-MAP) message in the current frame, the burst (Burst) carrying the DL-MAP message should follow the FCH. Moreover, if the downlink frame also needs to transmit an uplink mapping (UL-MAP) message, the UL-MAP message should appear immediately after the DL-MAP message. The next part of the frame is used to transmit data, which consists of multiple bursts.

Since the frequency resource is a non-renewable scarce and expensive resource, it is necessary to effectively utilize the frequency resource. Frequency reuse technology is a networking technology proposed to improve spectrum utilization and expand system capacity. Traditional frequency reuse technology can be divided into inter-frequency multiplexing technology and same-frequency multiplexing technology. The same frequency reuse technology can achieve a frequency reuse factor of 1, that is, cells within the coverage of the entire system use the same frequency band to serve users in the cell. Inter-frequency multiplexing technology forms several cells using different frequency bands in the system into a multiplexing cluster. The frequency bands occupied in this multiplexing cluster are all the frequency bands allowed by the system, and the whole system is composed of multiple multiplexing clusters. .

Since the multiplexing factor of the same-frequency multiplexing technology is only 1, it has high spectrum utilization and system capacity. However, since all cells use the same frequency band, edge users will suffer co-channel interference from other adjacent cells, and the communication quality will be seriously affected, so it is rarely used in practical cellular systems. The inter-frequency multiplexing technology can well suppress the same-frequency interference because the physical locations of the same-frequency cells are far apart. However, with the increasing number of wireless users, the system capacity of the inter-frequency multiplexing system is greatly challenged.

In order to avoid co-channel interference between base stations, WiMAX operators may adopt the networking mode C×N×S to be 1×3Segment (segment)×3, where C is the number of base stations in each cluster, and N is the total frequency reuse The number of channels (or channel groups), and S is the number of sectors per base station. In this networking mode, co-channel interference between base stations can be better suppressed, but the spectrum utilization rate becomes very low, and the throughput is difficult. ensure.

When the frequency resources of WiMAX operators are not rich, in the wireless communication network planning, the same-frequency networking method C×N×S is 1×1×3, where C is the number of base stations in each cluster, and N is the frequency The total number of multiplexed channels (or channel groups), S is the number of sectors per base station. At present, in this networking mode, since the base station uses the same carrier frequency for transmitting downlink signals in each sector, users at the cell border are greatly interfered by neighboring cells, thereby reducing the user experience. Although the network mode C×N×S is 1×3Segment (segment)×3, co-channel interference between base stations can be better suppressed, but the spectrum utilization rate becomes very low, and the throughput is difficult to guarantee. With some of the above traditional frequency reuse methods, the terminal cannot obtain the required bandwidth resources to the maximum extent.

Contents of the invention

The main purpose of the present invention is to provide a method for allocating downlink resources and a base station, so as to at least solve the problem that users at cell boundaries are greatly interfered by adjacent cells when the same-frequency networking mode is 1×1×3.

According to one aspect of the present invention, a downlink resource allocation method is provided, including: the base station judges the frequency interference level of the terminal according to the parameter information reported by the terminal, wherein the parameter information includes: CINR, RSSI, and signals received by the terminal from neighboring cells Intensity: the base station allocates downlink resources to the terminal according to the frequency interference level of the terminal according to the preset strategy, wherein the preset strategy includes: the downlink resources allocated to the terminal with the highest frequency interference level under different sectors of the base station are not multiplexed .

According to another aspect of the present invention, a base station is provided, including: a judging module, configured to judge the frequency interference level of the terminal according to the parameter information reported by the terminal, wherein the parameter information includes: CINR, RSSI and the receiving neighbor cell of the terminal signal strength; an allocation module, configured to allocate downlink resources to the terminal according to a preset strategy according to the frequency interference level of the terminal, wherein the preset strategy includes: assigning the terminal with the maximum frequency interference level under different sectors of the base station The downlink resources are not multiplexed.

Through the present invention, when the base station allocates downlink resources for the terminal, it allocates downlink resources for the terminal by judging the frequency interference level of the terminal, wherein the base station is the terminal with the highest frequency interference level under its different sectors (that is, the terminal at the cell boundary The downlink resources allocated by the terminal) are not multiplexed. In the present invention, since the downlink resources of terminals at different cell boundaries are not multiplexed, interference from adjacent cells to terminals at cell boundaries is avoided, and user experience is improved.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

FIG. 1 is a schematic structural diagram of a downlink physical frame in TDD mode in an existing WiMAX system;

FIG. 2 is a schematic structural diagram of a base station according to Embodiment 1 of the present invention;

FIG. 3 is a schematic structural diagram of a preferred base station according to Embodiment 1 of the present invention;

FIG. 4 is a flowchart of a method for allocating downlink resources according to Embodiment 2 of the present invention;

FIG. 5 is a schematic diagram of a scenario of a 3-sector network and N=3 in Embodiment 3 of the present invention;

6 is a schematic structural diagram of a downlink frame with N=3 in a 3-sector network in Embodiment 3 of the present invention;

FIG. 7 is a schematic diagram of a scenario of a 3-sector network and N=2 in Embodiment 3 of the present invention;

8 is a schematic structural diagram of a downlink frame with N=2 in a 3-sector network in Embodiment 3 of the present invention;

FIG. 9 is a schematic diagram of a networking mode in Embodiment 5 of the present invention;

FIG. 10 is a schematic structural diagram of a downlink frame in Embodiment 5 of the present invention;

FIG. 11 is a flow chart of processing by the base station for terminals with different frequency interference levels in Embodiment 5 of the present invention;

FIG. 12 is a flow chart of frame-by-frame scheduling bandwidth resource allocation for terminals with different frequency interference levels in Embodiment 5 of the present invention.

Detailed ways

Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

Embodiment one

FIG. 2 is a schematic structural diagram of a base station according to Embodiment 1 of the present invention. The base station includes: a judgment module 10 configured to judge the frequency interference level of the terminal according to parameter information reported by the terminal, wherein the above parameter information includes: carrier-to-interference-noise ratio (Carrier toInterference plus Noise Ratio, referred to as CINR), Received Signal Strength Indicator (Received Signal Strength Indicator, referred to as RSSI) and the signal strength of the adjacent cell received by the terminal; the allocation module 20 is used for according to the frequency interference level of the terminal Allocating downlink resources to the terminal according to a preset strategy, wherein the preset strategy includes: not multiplexing the downlink resources allocated to the terminal with the highest frequency interference level under different sectors of the base station.

In the above-mentioned base station provided by Embodiment 1 of the present invention, in order to avoid interference from neighboring cells received by terminals at the cell border, the allocation module 20 allocates The downlink resources are not multiplexed, thereby avoiding interference between terminals at the cell border and terminals in other cells.

FIG. 3 is a schematic structural diagram of a preferred base station according to Embodiment 1 of the present invention. The difference between the preferred base station and the base station shown in FIG. 2 is that the preferred base station may also include a configuration module 30 for Set N frequency interference levels according to the signal strength of the base station, and divide the downlink resources of each sector of the base station into N resource areas from the frequency and time domains, and configure each frequency interference level to correspond to a resource area, and each sector's The frequencies of the resource areas corresponding to the maximum frequency interference level are different from each other. The greater the frequency interference level is, the greater the interference of the terminal corresponding to the frequency interference level is from the neighboring cell. Wherein, N is greater than or equal to 2 and less than or equal to any sector The total number of users under . The judgment module 10 can determine the frequency interference level of the terminal by querying the N frequency interference levels set by the configuration module 30 according to the CINR and RSSI reported by the terminal and the signal strength received by the terminal from neighboring cells, and the allocation module 20 can determine the frequency interference level of the terminal according to the frequency interference level of the terminal. For the interference level, query the resource area corresponding to the frequency interference level configured by the configuration module 30, and allocate corresponding downlink resources for the terminal. Specifically, the allocation module 20 may use the resource area corresponding to the frequency interference level of the terminal as the downlink resource of the terminal, or if the resource area corresponding to the frequency interference level higher than the frequency interference level is idle, the allocation module 20 may also The part of idle resources can be allocated to the terminal. According to the preferred base station, the efficiency of downlink resource allocation can be improved.

It should be noted that although the above-mentioned preferred base station is described by taking the configuration module 30 as an example to preset and configure the frequency interference level, the resource area, and the corresponding relationship between the frequency interference level and the resource area, it is not limited to this. In practical applications, it can also be After determining the frequency interference level of the terminal, the decision module 10 allocates downlink resources according to a preset policy.

Preferably, the configuration module 30 is further configured to configure corresponding transmission power for each frequency interference level, wherein the smaller the frequency interference level is, the smaller the corresponding transmission power is. That is, in the embodiment of the present invention, the transmission power to the mobile terminal with low frequency interference level is reduced, so that the coverage area can be reduced, and the interference between cells can be further reduced.

Preferably, in the embodiment of the present invention, the base station can allocate the downlink resources of the terminals corresponding to each frequency interference level using fractional frequency reuse (FFR, Fractional Frequency Reuse) technology, that is, for terminals with lower frequency interference levels (terminals of this level Generally located in the center of the cell, terminals with good channel conditions and little interference to other cells) are allocated on the multiplexing set with a frequency reuse factor of 1; for terminals with a high level of frequency interference (terminals of this level are generally located in the cell Edge, because the distance from the base station is relatively far, the channel condition is relatively poor, and the interference with terminals in other cells is relatively large), therefore, the terminals of this part of the level are allocated to the multiplex with a frequency reuse factor of n (n≥2) Use set. In this way, the interference can be reduced, and the utilization rate of the downlink spectrum can also be improved.

Embodiment two

FIG. 4 is a flowchart of a method for allocating downlink resources according to Embodiment 2 of the present invention. The method mainly includes the following steps:

Step S402, the base station judges the frequency interference level of the terminal according to the parameter information reported by the terminal, wherein the parameter information includes: CINR, RSSI and signal strength received by the terminal from neighboring cells;

For example, the terminal reports the above parameter information to the base station when it joins the network, and the base station makes a judgment based on the parameter information, or the base station repeats S402 when the terminal is triggered periodically or event-triggered (for example, the signal of the terminal changes) until the terminal exits the network.

Specifically, based on the CINR and RSSI of the terminal reported by the terminal and the signal strength received by the terminal from neighboring cells, the base station can determine the strength of the signal received by the terminal from the base station and the interference from neighboring cells, thereby determining the frequency interference of the terminal grade.

For example, the frequency interference level may include N levels: UserType ₁ , UserType ₂ , UserType ₃ ..., UserType _N , where the value of N is greater than or equal to 2 and less than or equal to the total number of users in any sector. The UE of UserType ₁ suffers the least interference from neighboring cells, followed by UserType ₂ ..., and the UE of UserType _N suffers the greatest interference from neighboring cells (that is, outer-ring users). That is, the greater the frequency interference level, the corresponding frequency interference level The terminal is gradually increased by the interference from neighboring cells.

Step S404, the base station allocates downlink resources for the terminal according to the frequency interference level of the terminal according to a preset strategy, wherein the preset strategy includes: the frequency of the downlink resources allocated for the terminal with the highest frequency interference level in different sectors of the base station is not same.

UserType₁的终端可以使用所有的带宽即

而UserType_N用户只能使用大小为BW_N的带宽。For example, the base station can plan the bandwidth into N parts from the frequency domain and the time domain, representing different resource areas: BW ₁ ... BW _n ... BW _N , where BW _n refers to the bandwidth used by the terminal of UserType _n , Different frequency interference levels correspond to corresponding bandwidths. When allocating downlink resources to a terminal, the base station allocates bandwidth corresponding to the frequency interference level of the terminal to the terminal. Generally speaking, users with less interference have more available resources, and users with more interference have fewer available resources. For the nth frequency interference level terminal, the available bandwidth resource size can be

Terminals of UserType ₁ can use all the bandwidth i.e.

However, UserType _N users can only use the bandwidth of BW _N.

In order to ensure coverage, because UserType _N terminals (also called outer-ring users) suffer the most interference from neighboring cells, the bandwidth used by UserType _N terminals between neighboring cells is different, that is, under 1×1×S, S Outer ring users in each sector will not use the same bandwidth.

For example, for the case of N=3, the frequency interference levels of the terminal may include: high-level frequency interference (also called outer-ring user), medium-level frequency interference (also called middle-ring user) and low-level frequency interference (also called Inner ring users), the base station can divide the symbols of the downlink frame into two parts according to the time domain: the first part is the inner and outer ring resources divided in the frequency domain, and the latter part is the total number of symbols of the middle ring resources. Then divide the sub-channels of the inner and outer ring sets according to the ratio of the frequency resources of the inner and outer rings, and divide them into two sub-channel sets: respectively, the inner ring sub-channel set and the outer ring sub-channel set, wherein, preferably, the outer ring sub-channel set uses 1/3 of the sub-channels, and the remaining 2/3 of the sub-channels are used by the inner ring sub-channel set. Central ring users use all subchannels. Principles of resource allocation: outer-ring users can only use outer-ring resources; middle-ring users use middle-ring resources first and can continue to use outer-ring resources; inner-ring users use inner-ring resources first and can continue to use middle-ring resources. In this way, the reuse degree of outer ring sub-channel resources is effectively improved, and the waste of frequency band resources is reduced.

For the case of N=2, that is, all the inner-ring users are judged as middle-ring users or all the middle-ring users are judged as inner-ring users. When there are only outer-ring and middle-ring users, the resources of the outer and middle rings are divided in the time domain. In this case, the same-frequency interference suffered by the bandwidth resources of the outer ring can be minimized. When the middle-ring users are judged as inner-ring users, that is, when there are only outer-ring and inner-ring users, that is, only the inner and outer ring users are divided into frequency domains. In this case, higher spectrum efficiency can be obtained but co-channel interference is more serious.

When there are middle-ring users, the number of middle-ring symbols in all sectors can be fixed to the same value. Further reduce the interference between the resources in the middle ring and the resources in the inner and outer rings.

When the base station allocates downlink resources in a downlink frame, it first divides the downlink frame into N Regions according to frequency division and time division; then the base station allocates the bandwidth of Region _N to the terminal of UserType _N until the bandwidth is allocated or the level The terminal has no demand; then allocate the bandwidth of Region _N- 1 and the unused bandwidth of Region _N to the user of UserType _N- 1, until the bandwidth is allocated or the terminal has no demand; then continue to allocate Region _N to the user of UserType _{N-2 -2} bandwidth and the unused bandwidth of Region _N-1 and Region _N , until the bandwidth is allocated or the terminal has no demand; similarly, bandwidth is allocated for the terminals of UserType _N-3 ... UserType ₂ until the bandwidth is allocated or the terminal is not required The terminal has no demand; finally, resources are allocated to the terminal of UserType _1. According to the above process, the user of UserType ₁ can use the unallocated resources of the entire frame until the bandwidth is allocated or the terminal has no demand, and the resource allocation ends.

Preferably, when configuring the resource area corresponding to the frequency interference level, the base station will also configure the corresponding transmission power for each frequency interference level, wherein the smaller the frequency interference level is, the smaller the transmission power corresponding to the frequency interference level is; for example , for the above case of N=3, the relationship between the transmit power of the outer ring, middle ring, and inner ring resources is _Pouter > _Pin > _Pinner . Then, when the base station sends a signal to the terminal, it uses the transmission power corresponding to the frequency interference level of the terminal to send the signal, that is, reduces the transmission power to the inner ring terminal, reduces the coverage, and further avoids interference.

According to the above method provided by Embodiment 2 of the present invention, the frequency reuse can be determined according to the actual interference situation of the terminal. When the interference is small, the reuse factor can be 1, and when the interference is large, the multiplexing resources can be reduced. In this way, the transmission quality of the terminal can be guaranteed, and the spectrum utilization rate and system throughput can also be improved.

Embodiment Three

Embodiment 3 of the present invention takes the commonly used 3-sector (S=3) networking mode and the frequency interference level of N=3 as an example to describe the allocation of downlink resources in the embodiment of the present invention.

FIG. 5 is a schematic diagram of a 3-sector network with N=3. According to the frequency interference level, in Embodiment 3 of the present invention, terminals under one sector are divided into: inner-ring users, middle-ring users and outer-ring users. Inner-ring users are generally located at the main lobe of the antenna, relatively close to the station, have small path loss, and are less interfered by neighboring cells. Therefore, even if such users send downlink signals with a small It will have better quality; users in the middle ring are relatively farther away from the station than users in the inner ring, and the path loss and interference are relatively larger. Therefore, in order to ensure a certain signal quality, the base station transmits power for users in the middle ring. It is larger than the inner ring users; and the outer ring users are divided into two types: one is very close to the station but at the side lobe of the antenna. Although the signal strength is strong, the distance from the antennas of the two segments is similar The interference intensity is also very large. The other is located at the edge of the cell, the farthest from the station, the largest path loss, and the most serious interference from neighboring cells.

According to the characteristics of the terminals of the above three frequency interference levels and the terminal distribution and networking conditions, the downlink frames of the three segments under a base station are divided into the inner ring region (Inner Region), the outer ring region (Outer Region) and the middle ring region ( Median Region 3) parts, as shown in Figure 6.

Among them, the inner-ring users mainly use the inner-ring resources, and can also use the middle-ring and outer-ring resources when the resources of the middle ring and the outer ring are idle. Inner ring users use low-power transmission to reduce interference to neighboring outer rings.

Central ring users mainly use the central ring resources, and can also use the outer ring resources when the outer ring resources are free. Users in the middle ring use lower power transmission to reduce interference while ensuring a certain signal quality.

Outer-ring users are subject to greater interference from neighboring cells, and at the same time have greater interference to neighboring cells, so they can only use outer-ring resources and transmit with higher power to ensure coverage.

It can be seen from Figure 6 that the middle rings of the three segments under the same base station are staggered from the outer ring and the inner ring in the time domain, and use the same frequency resources; the outer rings of the three segments are frequency division, and there is no interference between the outer rings; and The inner ring uses all the frequency resources except the frequency resources of the middle ring and the outer ring. There is frequency overlap between the inner ring and the inner ring of the three segments, and between the inner ring and the outer ring.

Between the three sectors, there is interference between the middle ring and the middle ring. Therefore, the users of the middle ring need to control the transmit power of the carrier in the downlink middle ring area to reduce the interference to neighboring cells and ensure a certain signal quality. There is also interference between the inner rings of the three segments, but the carrier of the inner rings should maintain a lower transmit power, and it can be seen from Figure 5 that the distance between the inner rings is relatively long. Therefore, the inner rings between sectors The interference with the inner ring is very small and can be ignored. At the same time, there is interference between the inner and outer rings of the three segments, but because the outer ring generally has higher power in the embodiment of the present invention, while the inner ring has low power and a small coverage area, therefore, the inner ring users in the current sector do not Will interfere with the outer ring of another sector. In addition, since users with excellent channel conditions can generally enter the inner ring, if there are no conditions for users to reach the inner ring, there may be no inner ring users. However, there is no interference between the middle ring and the outer ring of the three segments due to time division.

Embodiment four

Embodiment 4 of the present invention takes the commonly used 3-sector (S=3) networking mode and the frequency interference level of N=2 as an example to describe the allocation of downlink resources in the embodiment of the present invention.

When S=3, N=2, that is, users are only divided into outer-ring and inner-ring users, as shown in Figure 7, the scene is similar to the scene when N=3, the frame structure has some changes, and bandwidth resources are only divided into 2 Part, the frame structure is shown in Figure 8.

The base station makes a judgment according to the downlink signal condition. After the terminal is connected to the network, according to the downlink CINR and RSSI information of the terminal at the base station and the strength of the signal received by the terminal from neighboring stations, it is judged which frequency interference level the terminal is in, which is low, medium or high, and then according to the frequency interference level of the terminal Perform transmit power control and allocate downlink bandwidth resources according to the above strategy.

Embodiment five

Embodiment 5 of the present invention is described by taking S=3, N=3 under Wimax, that is, the networking mode of 3-sector networking and 3 types of frequency interference levels as an example. FIG. 9 is a schematic diagram of a networking mode in this embodiment. Since there are three types of users with frequency interference levels, downlink resources are also divided into three types. The downlink frame structure is shown in FIG. 10 .

FIG. 11 is a flow chart of the base station processing terminals with different frequency interference levels in this embodiment, which mainly includes the following steps:

Step 1101, the terminal accesses the network;

Step 1102, the base station judges whether the user is an inner-ring, middle-ring or outer-ring user according to the downlink signal condition of the terminal and the signal condition of the neighboring station received by the terminal;

Step 1103: the base station implements different power control strategies and different downlink bandwidth allocation mechanisms for the terminal according to the user type of the terminal;

Step 1104: Whether the signal of the terminal changes or the re-judgment period of the terminal is up, if yes, go to step 1102, otherwise go to step 1105;

Step 1105: Whether the terminal logs out of the network, if yes, the process ends, otherwise go to step 1104;

Fig. 12 is a flow chart of frame-by-frame scheduling bandwidth resource allocation for terminals of different frequency interference levels in S=3 under Wimax, N=3, mainly including the following steps:

Step 1201, allocating bandwidth resources of the outer ring for outer ring users;

Step 1202, whether there is no need for outer ring users or the outer ring resources have been allocated, if yes, go to step 1203, otherwise go to step 1201;

Step 1203, allocating the bandwidth resources of the central ring and the bandwidth resources not allocated by the outer ring to the users of the central ring;

Step 1204, whether there is no need for users in the middle ring or whether the resources of the middle ring and the outer ring have been allocated, if yes, go to step 1205, otherwise go to step 1203;

Step 1205, allocating bandwidth resources of the inner ring and unallocated bandwidth resources of the outer and middle rings to users of the inner ring;

In step 1206, whether there is no need for inner-ring users or all available resources have been allocated, if yes, the process ends; otherwise, go to step 1205.

From the above description, it can be seen that in the embodiment of the present invention, the same-frequency networking mode C×N×S is 1×1×S (S is the number of sectors of each base station), by planning the downlink The frame structure of the frame and the frequency band used by the S segments under the same station, and by controlling the transmit power of the base station, the multiplexing frequency can be adjusted according to the interference situation. The optimal frequency multiplexing factor can reach 1, which improves spectrum utilization. While improving the efficiency and expanding the system capacity, it also reduces interference, improves the performance of the cell edge, and improves the total throughput of the entire cell, helping operators solve the problem of limited frequency resources, and the coverage and throughput performance of the cellular network can be effectively improved. improve.

Obviously, those skilled in the art should understand that each module or each step of the above-mentioned present invention can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network formed by multiple computing devices Alternatively, they may be implemented in program code executable by a computing device so that they may be stored in a storage device to be executed by a computing device, and in some cases in an order different from that shown here The steps shown or described are carried out, or they are separately fabricated into individual integrated circuit modules, or multiple modules or steps among them are fabricated into a single integrated circuit module for implementation. As such, the present invention is not limited to any specific combination of hardware and software.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (12)

1. a descending resource allocation method is characterized in that, comprising:

The frequency interferences grade at said terminal is judged according to the parameter information of terminal to report in the base station, and wherein, said parameter information comprises: carrier-in-interference noise ratio CINR, receive the signal strength signal intensity that signal strength signal intensity indication RSSI and said terminal receive the adjacent area;

Said base station is said terminal distribution downlink resource according to the frequency interferences grade at said terminal according to preset strategy; Wherein, said preset strategy comprises: for the downlink resource of the terminal distribution of the peak frequency level of interference under the different sectors of said base station does not carry out multiplexing.

2. method according to claim 1 is characterized in that, before the frequency interferences grade at the said terminal of said base station judges, said method also comprises:

Said base station is provided with N frequency interferences grade according to the signal strength signal intensity of CINR, RSSI and adjacent area; Wherein, the frequency interferences grade is big more, and the corresponding terminal of this frequency interferences grade receives the interference of adjacent area big more; Wherein, N is smaller or equal to the total number of users under arbitrary said sector more than or equal to 2;

Said base station is divided into N resource area with the downlink resource of each sector under it from frequency domain and time domain; Dispose the corresponding resource area of each frequency interferences grade; And the frequency of the resource area that the peak frequency level of interference of each sector is corresponding is different.

3. method according to claim 2; It is characterized in that said base station is that said terminal distribution downlink resource comprises according to the frequency interferences grade at said terminal according to preset strategy: said base station is the said terminal distribution resource area corresponding with the frequency interferences grade at said terminal.

4. method according to claim 3; It is characterized in that; If it is idle that the frequency interferences grade corresponding resource area higher than the frequency interferences grade at said terminal exists, the downlink resource that then said base station is said terminal distribution also comprises the said high corresponding resource area of frequency interferences grade.

5. according to each described method in the claim 2 to 4, it is characterized in that, said N=3, said N frequency interferences grade is: senior frequency interferences, intermediate frequency interferences and rudimentary frequency interferences; Said base station with its down the downlink resource of each sector be divided into N resource area from frequency domain and time domain and comprise:

Said base station with the symbol of the descending sub frame of each sector according to the time domain separated into two parts; Wherein, A back part all symbols on whole frequency resource are second resource area, and said second resource area is corresponding with intermediate frequency interferences, and all symbols on the whole frequency resource of a preceding part are divided into first resource area and information resources zone on frequency domain; Said first resource area is corresponding with rudimentary frequency interferences, and the information resources zone is corresponding with senior frequency interferences grade.

6. method according to claim 5 is characterized in that, said first resource area accounts for 2/3 of frequency resource on frequency domain, and said information resources zone accounts for 1/3 of frequency resource on frequency domain.

7. according to each described method in the claim 2 to 4, it is characterized in that, said N=2, said N frequency interferences grade is: senior frequency interferences and intermediate frequency interferences; Said base station with its down the downlink resource of each sector be divided into N resource area from frequency domain and time domain and comprise:

Said base station with the symbol of the descending sub frame of each sector according to the time domain separated into two parts; Wherein, A back part all symbols on whole frequency resource are second resource area; Said second resource is corresponding with senior frequency interferences, and a preceding part all symbols on whole frequency resource are first resource area, and said first area is corresponding with said intermediate frequency interferences.

8. according to each described method in the claim 2 to 4, it is characterized in that, said N=2, said N frequency interferences grade is: senior frequency interferences and rudimentary frequency interferences; Said base station with its down the downlink resource of each sector be divided into N resource area from frequency domain and time domain and comprise:

Said base station is divided into two zones with the symbol of the descending sub frame of each sector according to frequency domain, and is corresponding with senior frequency interferences and rudimentary frequency interferences respectively.

9. according to each described method in the claim 2 to 4, it is characterized in that said base station is when disposing the resource area corresponding with the frequency interferences grade, said method also comprises:

Said base station is the corresponding transmitting power of each frequency interferences grade configuration, and wherein, the frequency interferences grade is more little, and the transmitting power of this frequency interferences grade correspondence is more little;

When said base station was said terminal distribution downlink resource according to the frequency interferences grade at said terminal according to preset strategy, said method also comprised:

Said base station obtains the transmitting power corresponding with the frequency interferences grade at said terminal, with this transmitting power as sending the power that signal uses to said terminal.

10. a base station is characterized in that, comprising:

Judging module is used for judging according to the parameter information of terminal to report the frequency interferences grade at said terminal, and wherein, said parameter information comprises: carrier-in-interference noise ratio CINR, receive the signal strength signal intensity that signal strength signal intensity indication RSSI and said terminal receive the adjacent area;

Distribution module; The frequency interferences grade that is used for according to said terminal is said terminal distribution downlink resource according to preset strategy; Wherein, said preset strategy comprises: for the downlink resource of the terminal distribution of the peak frequency level of interference under the different sectors of said base station does not carry out multiplexing.

11. base station according to claim 10 is characterized in that, said base station also comprises: configuration module; Be used for N frequency interferences grade being set, and the downlink resource of each sector of said base station is divided into N resource area from frequency domain and time domain, dispose the corresponding resource area of each frequency interferences grade according to the signal strength signal intensity of CINR, RSSI and adjacent area; And the frequency of the resource area that the peak frequency level of interference of each sector is corresponding is different; Wherein, the frequency interferences grade is big more, and the corresponding terminal of this frequency interferences grade receives the interference of adjacent area big more; Wherein, N is smaller or equal to the total number of users under arbitrary said sector more than or equal to 2.

12. base station according to claim 11 is characterized in that, said configuration module also is used to the corresponding transmitting power of each frequency interferences grade configuration, and wherein, the frequency interferences grade is more little, and the transmitting power of this frequency interferences grade correspondence is more little.

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