WO2011150719A1 - 小区间干扰协调信息的处理方法及装置 - Google Patents

小区间干扰协调信息的处理方法及装置 Download PDF

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Publication number
WO2011150719A1
WO2011150719A1 PCT/CN2011/072549 CN2011072549W WO2011150719A1 WO 2011150719 A1 WO2011150719 A1 WO 2011150719A1 CN 2011072549 W CN2011072549 W CN 2011072549W WO 2011150719 A1 WO2011150719 A1 WO 2011150719A1
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Prior art keywords
cell
interference coordination
coordination information
resource
information
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PCT/CN2011/072549
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English (en)
French (fr)
Inventor
段刚刚
赵刚
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中兴通讯股份有限公司
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Priority to EP11789098.8A priority Critical patent/EP2579658B1/en
Priority to JP2013512734A priority patent/JP5667696B2/ja
Publication of WO2011150719A1 publication Critical patent/WO2011150719A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J11/00Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023Interference mitigation or co-ordination
    • H04J11/005Interference mitigation or co-ordination of intercell interference
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/50Allocation or scheduling criteria for wireless resources
    • H04W72/54Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/27Control channels or signalling for resource management between access points

Definitions

  • the present invention relates to the field of communications, and in particular to a method and apparatus for processing inter-cell interference coordination information.
  • LTE Long Term Evolution
  • the downlink physical layer uses Orthogonal Frequency Division Multiplexing (OFDM) technology to divide resources from two-dimensional frequency and time.
  • OFDM Orthogonal Frequency Division Multiplexing
  • each cell uses all available bandwidth, thereby greatly improving the throughput of the cell.
  • OFDM can ensure that the signals between users in the cell are orthogonal, so that the interference of users inside the cell can be effectively avoided.
  • the interference cancellation is performed by using the processing gain at the user end to perform the interference suppression;
  • the interference randomization is to perform the interference suppression by randomizing the interference signal;
  • Inter-Cell Interference Coordination (ICIC) The core of the problem is that the resources of the edge users of the neighboring cells are orthogonal as much as possible, so that the interference of the users at the edge of the neighboring cells is reduced. Due to the flexible use of the interference coordination, the implementation is simple and the effect is ideal, and it becomes the mainstream of the inter-cell technology.
  • ICIC is divided into static ICIC, dynamic ICIC and semi-static ICIC.
  • static ICIC has too many restrictions on resources, and has a great influence on frequency selection and other performance.
  • the dynamic overhead coordination coordination has a large signaling overhead, and the inter-base station signaling interaction delay is long; semi-static thousand 4 especially coordination can overcome the disadvantages of static ICIC and dynamic ICIC to some extent.
  • the key to the semi-static interference coordination is that the inter-cell load information (Load Information) is transmitted between the base stations through the X2 interface, which is used to obtain the resource occupation information of the neighboring cell, and is used as the basis for resource allocation of the cell.
  • the load information mainly includes the following information: Cell information: Cell ID of the source cell; High Interference Indication (referred to as ⁇ ) information; Downstream relatively narrowband transmit power (Native Narrowband Tx) Power, referred to as RNTP) information; Overload Indication (OI) information.
  • the RNTP information is generated by measuring the power of the resource element (Resource Element, RE for short).
  • the physical layer needs to report according to the measured power of the corresponding RE, and the base station then The reported value performs calculation of RNTP information bits and generation of RNTP information.
  • This method of production relies on the accuracy of the physical layer measurement of the unit RE transmit power (Energy Per RE, referred to as EPRE).
  • a primary object of the present invention is to provide a processing scheme for inter-cell interference coordination information to solve at least the above problems.
  • a method for processing inter-cell interference coordination information including: determining a number of resource blocks occupied by a cell edge user in a cell within a predetermined time interval; and coordinating the interference of the cell
  • the value of the same number of bits in the information is set to 1; according to the range of the cell edge user-specific resources of the cell, the bits with the bit value of 1 are arranged in a bandwidth according to a predetermined spreading order;
  • the cell sends the interference coordination information to the neighboring cell.
  • determining the number of resource blocks occupied by the cell edge user in the cell in the predetermined time interval comprises: counting a total number of resource blocks occupied by the cell edge user within a certain time duration; using the total number calculation The number of resource blocks that the cell edge user occupies on average over a predetermined time interval.
  • the predetermined time interval is a transmission time interval.
  • the sending, by the cell, the interference coordination information to the neighboring cell includes: comparing the interference coordination information with corresponding bit bits in the previously obtained interference coordination information; If the number of bits having different values in the bitmap exceeds a threshold, the interference coordination information is transmitted to the neighboring cell.
  • the method further includes: the cell performing resource allocation according to the interference coordination information of the current cell and the interference coordination information from the neighboring cell.
  • the cell statistics the interference coordination information sent by the neighboring cell received within a predetermined time period, and obtains the interference coordination information from the neighboring cell.
  • the cell statistics, the interference coordination information sent by the neighboring cell received in the predetermined time period includes: the interference coordination information of the neighboring cell received by the cell in the predetermined time period Perform summation or weighted summation by bit.
  • the bit bits with the bit value of 1 are arranged in the bandwidth according to a predetermined spreading order, including: the cell and the other two phases in the same base station.
  • the cell-edge user-specific resources of the neighboring cell occupy different frequency ranges; the cell-edge user-specific resource occupies the bandwidth of the leftmost segment of the cell, and the bit corresponding to the first predetermined resource block is 1 in the interference coordination information of the cell.
  • the bit is 0, where the first predetermined resource block is the first resource block after the cell edge user-specific resources of the cell are arranged in a descending order, and the cell edge user of the cell is within a predetermined time interval.
  • the number of resource blocks occupied; the interference coordination information of the cell in the frequency range of the intermediate segment of the cell-end user-specific resource occupying bandwidth is 1 and the remaining bits are 0, wherein the remaining bits are 0, wherein
  • the second predetermined resource block is a cell edge user-specific resource of the cell, which is arranged in order from the middle to the two sides. a resource block of the cell that is in the frequency range of the third segment of the user-specific resource-occupied bandwidth; the bit corresponding to the third predetermined resource block is 1 and the remaining bits are 0, where
  • the third predetermined resource block is a resource block in the middle of the cell edge user-specific resources of the cell in the order from largest to smallest.
  • the medium access control layer of the base station includes: a resource data statistics module, configured to determine a cell edge user in the cell at a predetermined time. a quantity of resource blocks occupied in the interval; a interference coordination information generating module; configured to set a value of the number of bits equal to the number in the interference coordination information of the cell to 1; and according to the cell and the cell
  • the range of the cell edge user-specific resources of the neighboring cell, the bits with the value of 1 in the interference coordination information of the cell are arranged in a predetermined spreading order; the interference coordination information sending module is set to Transmitting the interference coordination information to the neighboring cell.
  • the method further includes: a interference coordination information receiving module, configured to receive interference coordination information from the neighboring cell.
  • the number of resource blocks occupied by the cell edge users in the cell in the predetermined time interval is determined, and the value of the bits equal to the above-mentioned number in the interference coordination information of the cell is set. 1; according to the range of the cell edge user-specific resources of the cell, the bits with the bit value of 1 are arranged in a bandwidth according to a predetermined spreading order; the cell sends the interference coordination information to the neighboring cell.
  • FIG. 1 is a flowchart of a method for processing inter-cell interference coordination information according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a RNTP bitmap extension direction of different cells in a RNTP generation process according to an embodiment of the present invention
  • 3 is a structural block diagram of an apparatus for processing inter-cell interference coordination information according to an embodiment of the present invention
  • FIG. 4 is a structural block diagram of an apparatus for processing inter-cell interference coordination information according to an embodiment of the present invention
  • FIG. 6 is a flowchart of a RNTP receiving process according to Embodiment 2 of the present invention
  • FIG. 7 is a structural block diagram of a second embodiment of the present invention
  • FIG. 8 is a block diagram of a RNTP generating process according to Embodiment 2 of the present invention
  • FIG. 1 is a flowchart of a method for processing inter-cell interference coordination information according to an embodiment of the present invention. The process includes the following steps: Step S102 Determining, by the cell edge user in the cell, the number of resource blocks (abbreviated as RBs) occupied by the cell edge user in a predetermined time interval; and in step S104, setting the value of the number of equal bits in the interference coordination information of the cell to
  • Step S106 According to the range of the cell edge user-specific resources of the cell, the bits with the value of 1 in the interference coordination information of the cell are arranged on the bandwidth according to a predetermined spreading order; Step S108, The cell sends interference coordination information to the neighboring cell.
  • the cell generates the coordination information (for example, RNTP information and ⁇ information) according to the number of resource blocks of the Media Access Control (MAC) layer, thereby solving the measurement reporting according to the physical layer.
  • the total number of resource blocks occupied by the cell edge user may be counted in a step length in step S102; the total number of resource blocks occupied by the cell edge user in a predetermined time interval is calculated using the total number.
  • the "certain duration" in step S102 can be determined according to the actual situation.
  • the purpose of using the duration is to calculate the number of resource blocks occupied by the cell edge users at intervals. For example, the total number of RBs occupied by cell edge users is counted in a statistical time (integral multiples of the transmission time interval, such as 50 or 100 TTI), and then, how many transmission time intervals are included in the statistical time (Transmission Time Interval) , abbreviated as TTI), to obtain an average of the number of RBs occupied by the cell edge users in each cell.
  • TTI Transmission Time Interval
  • a determination may be first made, and then it is determined whether to transmit the coordination information.
  • the interference coordination information obtained this time may be sequentially compared with the corresponding bit in the previously obtained interference coordination information; if the number of bits having different values in the two bitmaps exceeds the threshold, then The neighboring cell transmits the current interference coordination information.
  • the cell may further receive interference coordination information from the neighboring cell, and then perform resource allocation according to the interference coordination information of the current cell and the interference coordination information of the neighboring cell.
  • the cell may count the interference coordination information sent by the neighboring cell received within the predetermined time period (for example, the interference coordination information sent by the neighboring cell received within the predetermined time period is performed by bit. Summing or weighted summation;), obtaining the interference coordination information from the neighboring cell.
  • the "predetermined time period" in this paragraph can be selected according to the actual situation. For example, 10 TTIs or 20 TTIs can be selected.
  • the following describes the three cells of the same base station as an example. For the same base station, the cell edge user-specific resources of the cell and the two neighboring cells occupy different frequency ranges. The cell edge user-specific resource bandwidth is the leftmost segment. The bit corresponding to the first predetermined resource block in the interference coordination information of the frequency range is 1 and the remaining bits are 0, wherein the first predetermined resource block is the cell edge user-specific resource of the cell is from small to large.
  • the first resource blocks after the sequential arrangement, ⁇ the number of resource blocks occupied by the cell edge users of the cell in a predetermined time interval; and the interference coordination information of the cells in the frequency range of the middle segment of the cell edge user-specific resource bandwidth
  • the second predetermined resource block corresponds to a bit of 1 and the remaining bits are 0, wherein the second predetermined resource block is a cell edge user-specific resource of the cell, and the subsequent resource blocks are arranged in order from the middle to the two sides;
  • the cell-edge user-specific resource bandwidth of the third-stage frequency range of the cell's interference coordination information and the third predetermined resource block The corresponding bit is 1 and the remaining bits are 0.
  • the third predetermined resource block is the middle resource block of the cell edge user-specific resources of the cell in the order from largest to smallest.
  • FIG. 2 is a schematic diagram showing the direction of RNTP bitmap expansion of different cells in the RNTP generation process according to the embodiment of the present invention.
  • the figure is for the case where the frequency is divided into three segments and there is no center dedicated frequency band IC, as shown in FIG. 2,
  • the part of the background is the dedicated frequency band OC of the edge user of the cell, and the part without the background is divided into the resources BC occupied by the central user of the cell.
  • ⁇ _ Three cells are defined as three sectors of the base station: sector 1, sector 2, and sector 3. Then the information bits of the first RNTP are generated as follows:
  • FIG. 3 is a structural block diagram of an apparatus for processing inter-cell interference coordination information according to an embodiment of the present invention.
  • the apparatus is located at a medium access control layer of a base station. As shown in FIG.
  • the apparatus includes: a resource data statistics module 32, and a jamming
  • the coordination information generation module 34 and the interference coordination information transmission module 36 will be described below.
  • the resource data statistics module 32 is configured to determine the number of resource blocks occupied by the cell edge users in the cell within a predetermined time interval;
  • the interference coordination information generating module 34 is connected to the resource data statistics module 32, and the module is set to be in the cell Setting, in the interference coordination information, a bit with a value equal to 1 in the above-mentioned quantity; and according to the range of the cell edge user-specific resources of the cell and the neighboring cell, the bit having the value of 1 in the interference coordination information of the cell Arranged in bandwidth according to a predetermined spreading order are arranged in a mutually staggered manner in frequency;
  • the interference coordination information transmitting module 36 is connected to the interference coordination information generating module 34, and the module is arranged to transmit interference coordination information to the neighboring cells.
  • FIG. 4 is a structural block diagram of an apparatus for processing inter-cell interference coordination information according to an embodiment of the present invention.
  • the apparatus further includes: a interference coordination information receiving module 42 configured to receive from a neighboring cell.
  • the interference coordination information Embodiment 2
  • a method and apparatus for independently generating RNTP information and processing by the MAC layer without relying on the EPRE reported by the physical layer are provided.
  • This embodiment combines the first embodiment with its preferred embodiment.
  • the uplink information can also be generated by using the same process.
  • the following describes the generation of the RNTP information as an example. The generation of the ⁇ is not mentioned in this embodiment.
  • Step S501 Each TTI of each cell counts the number of RBs occupied by users in the cell, until the preset is reached. Statistical period. If the statistical period has not been reached, the step is continued, and the number of RBs continues to be accumulated, otherwise, the process proceeds to step S502.
  • Step S502 Calculate the average number of RBs occupied by the edge users per TTI per cell in the statistical period.
  • Step S 503 Generate RNTP Per PRB (Physical RB) information of the local cell according to the preset edge user cell exclusive resource (OC) range and the average number of RBs occupied by each edge user in each cell (hereinafter referred to as RNTP). information;).
  • Step S504 comparing the RNTP Per PRB information generated by the 4th station with the RNTP Per PRB information of the previous statistical period;;; the number of different RNTP Per PRB information is greater than a preset threshold.
  • RNTPDiffThp step S505 is performed, and the information is sent to the neighboring cell; otherwise, it is not sent, and the RNTP Per PRB information in this cycle is cleared in bits, and is ready to enter the statistics of the next cycle.
  • the RNTPDiffThp can be 0 by default, which means that the RNTP information is sent to the neighboring area regardless of whether the RNTP information is updated or not.
  • the adjustment range can be adjusted to the maximum number of RBs corresponding to the actual bandwidth.
  • FIG. 6 is a flowchart of a RNTP receiving process according to Embodiment 2 of the present invention. The process includes the following steps: Step S601: Define a RNTP statistical receiving period, and define a timer.
  • Step S602 Each TTI of each cell detects whether There is RNTP information sent by the neighboring cell; if yes, receiving RNTP information of the neighboring cell, and recording the neighbor cell ID; Step S603, processing the received RNTP information and the previously received RNTP information, for example, bitwise summation , weighted summation, etc.; determine whether the RNTP reception statistics period is reached, if not, continue the step ⁇ If it is reached, proceed to the next step ⁇ step S604, according to the received RNTP according to the above method
  • the RNTP interference indication and the RNTP Per PRB information of the local cell complete the resource bitmap update and output to the resource allocation module.
  • FIG. 7 is a structural block diagram of a device according to Embodiment 2 of the present invention. As shown in FIG. 7, the device includes: a resource number statistics module, an RNTP information generating module, an RNTP information sending module, and an RNTP information receiving module. The device is located at the MAC layer of the eNB.
  • the resource number statistics module mainly performs periodic statistics on resource occupancy of edge users of each cell, and is used for subsequent generation of RNTP Per PRB information;
  • the RNTP information generation module mainly performs RNTP Per PRB bitmap information according to the resource occupancy count calculated by the resource number statistics module and the predefined edge user exclusive resource (OC) range.
  • the OC resource is located in different frequency ranges of the cell bandwidth according to different cells; the RNTP Per PRB bitmap information indicates which locations the user of the cell will occupy, the PRB is the location information, the RNTP is the occupation flag, and the 1 indicates the occupation. 0 means no occupation.
  • the RNTP information sending module mainly compares the newly generated RNTP information with the RNTP information of the last statistical period by bit. If the different number of bits is greater than the preset RNTP sending threshold, it indicates that the results of the two statistics are compared. The big difference is that the resource occupancy of the edge UE has changed a lot. Then, the new RNTP message is sent. Otherwise, the difference between the two comparison results is small, and the resource allocation is not affected. , you can retrieve the policy that is not sent.
  • the RNTP information receiving module mainly receives the RNTP information of the neighboring area cyclically during the statistical acceptance period, so as to prevent the RNTP information of multiple neighboring areas from reaching the local area at the same time; after the statistical period ends, the RNTP after the bitwise summation
  • the information is output to the resource allocation module for reference.
  • the generation of the RNTP can be separated from the impact of the EPRE on the physical layer, and the limitation of the physical layer power measurement is eliminated.
  • the strategy of generating the RNTP based on the CEU is obtained.
  • each cell k sysSFN -DlRntpRptlnterval -1
  • the number of RBs occupied by the edge UEs is accumulated in the statistical period, and then the average RB it N R r TTT required for each TTI to satisfy the GBR of the edge UE is calculated.
  • GBR N GBR
  • RNTP ' 1 DlTtilnDlRntpRptlnterval where, Reports the number of downlink subframes in the period for the RNTP.
  • the information bits of RNTP are generated under 3 ⁇ 4 ports: The description of this formula only matches the sector-specific resources pre-allocated in sector 1 of the [o, oc] region; for edge-specific resources pre-allocation in sector 2 located in [OC, 2OC], the RNTP bitmap is the OC resource of the cell From the middle to the two sides; and for the edge-specific resources pre-allocated in the sector 2 of [2OC, 3OC], the RNTP information is expanded from large to small. The purpose of setting the extension direction is to minimize fragmentation in resource allocation. TP n RNTP.
  • the RNTP receiving process is as follows: Define an RNTP processing cycle because different neighboring cells are not necessarily sent at the same time.
  • RNTP Network Address Translation
  • RNTP RNTP cdM , where RNTP ceUM is the RNTP sent by the neighboring cell (cellld) to the cell. And cdlld ⁇ is a collection of celllds of neighboring cells; the method of summation here is only an example of how to operate the received RNTP information in the neighboring cell, and is not the only processing method. Complete the statistical processing of the RNTP information and update the resource bitmap. Due to the difference in frequency band division in the interference coordination, the direction of RNTP generation will be different. In order to explain the embodiment as much as possible, the fourth embodiment and the fifth embodiment will be further described below.
  • the fourth embodiment considers that the pre-allocated frequency range is divided into three segments, and the downlink RNTP information is generated and processed.
  • the figure is for the frequency divided into three segments, and there is no central dedicated band IC, as shown in the figure.
  • the part with the background is the dedicated frequency band OC of the edge user of the cell, and the part without the background is divided into the resources BC occupied by the central user of the cell.
  • the pre-allocated frequency band a small number of edge users is considered, the cell load is light, the GBR requirement is not high, and the edge user occupies less resources, and does not exceed the simple scenario of the edge user-specific resource range OC.
  • the RNTP generation and the whole process are as follows: Each cell records the number of RBs required by the intra-cell edge user to satisfy the GBR in each downlink subframe; if the statistical period is not met, the statistics are continued and the number of RBs is continued. If the statistics period has been reached, the number of RBs allocated to the edge UEs of each TTI per cell is obtained, and the number of RBs is adjusted according to the average GBR of the cell edge UE. The number of RBs is Nrb, and each sector maintains its own Nrb value.
  • the RNTP bitmap information is generated on different frequency bands for three sectors of one base station: the first sector, from left to right within the [0, OC] bandwidth Set Nrb to 1; if there are still OC-Nrb bits left, set it to 0.
  • Nrb/2 bits are extended from the middle (OC*3/2) to both sides in the [OC, 2OC] bandwidth, and the extended position is set to 1; if there are remaining bits, it is set to 0.
  • the Nrb bit is extended from right to left within the [2OC, 3OC] bandwidth, extended to position 1, otherwise set to 0.
  • FIG. 8 is a schematic diagram showing the direction of RNTP bitmap expansion of different cells in the RNTP generation process according to Embodiment 5 of the present invention. The figure is for the case where the frequency is divided into four segments and there is a central dedicated band IC.
  • the portion with the twill background is the dedicated user band OC of the cell edge, and the portion with the horizontal background is occupied and occupied by the central user of the cell.
  • the edge users In the case of the above-mentioned pre-allocated frequency band, a large number of edge users are considered, the cell load is large, the GBR requirement is relatively high, and the edge users occupy more resources, and may even exceed the complex scene of the pre-assigned edge user-specific resource range OC.
  • the process of generating and processing is as follows: Each cell records the number of RBs required by the intra-cell edge user to satisfy the GBR in each downlink subframe; if the statistical period is not met, the statistics are continued and the RB number is summed; if the statistics period has been reached, the next step is performed; The number of RBs allocated to the edge UEs of each TTI is obtained, and the number of RBs is adjusted according to the average GBR of the cell edge UE. The number of the RBs obtained last is Nrb, and each sector Maintaining its own Nrb value and proceeding to the next step.
  • Nrb positions are set from left to right.
  • Nrb may extend to the right to break through the range of OC, enter the exclusive resource range of the second sector, and in extreme cases may Will enter the exclusive resource range of the third sector.
  • the Nrb/2 bits are extended from the middle (OC*3/2) to the two sides in the [OC, 2OC] bandwidth, and the extended position is set to 1. The two sides may each break through [OC , 2OC] restrictions, enter the exclusive resource range of the edge user of the first sector and the third sector respectively.
  • the Nrb bit is extended from right to left within the [2OC, 3OC] bandwidth, extending to position 1, otherwise set to 0; likewise, the number of bits set to 1 may also be extended to the second And the edge user-specific resource range of the first sector.
  • the scheduling policy is slightly more complicated; each cell needs to refer to two pieces of information when allocating resources to the edge users:
  • the HII bitmap information indication of the cell indicates that the number of bits indicated by 1 is The location of the resource to be occupied by the cell, the neighboring area should avoid assigning the location to the edge user when receiving the bitmap information of the area;
  • processing the neighboring area information received by the cell for example Said bitwise addition, the information indicates that the ⁇ information sent by the neighboring area is superimposed on the corresponding resource location in the area, and the superimposed sum is larger, indicating that the influence of the neighboring area edge on the position is greater, and the resource allocation in the area is performed. The more you have to avoid assigning these locations to edge users.
  • each cell cannot meet the requirements of the edge users in the OC of its own edge user-specific resources. There is a partial overlap between the dedicated resources of each cell, and the interference must exist. At this time, resource allocation It is necessary to find the resource allocation according to the principle of the interference indication from small to large, and try to stagger the gap between the edges of the cell in the frequency, so as to achieve the purpose of the interference control.
  • the RNTP and the ⁇ information generated in the foregoing embodiment of the present invention affect the resource allocation strategy of the cell according to the inter-cell interference, so that the coordination between the inter-cell interference and the rational allocation of resources can be achieved.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

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Description

小区间干状胁调信息的处理方法^置 技术领域 本发明涉及通信领域, 具体而言, 涉及一种小区间千扰协调信息的处理 方法及装置。 背景技术 长期演进 ( Long Term Evolution, 简称为 LTE ) 下行物理层釆用正交频 分复用 ( Orthogonal Frequency Division Multiplexing, 简称为 OFDM )技术, 对资源从频率和时间进行二维的划分。 在 LTE系统中, 各小区使用全部可用 的带宽, 从而大大提高了小区的吞吐率。 从组网方面考虑, OFDM可以保证小区内部用户之间的信号是正交的, 从而可以有效避免小区内部用户的千扰。 但是, 由于相邻小区的频率范围一 样, 小区间的千扰仍然会存在, 特别对于小区边缘用户 ( Cell Edge User, 简 称为 CEU )来说, 本身其信号就比较弱, 如果邻区边缘用户也分配到了和其 一样的频带, 就会对其造成严重的小区间千扰。 目前, 有三种常用的小区间千 4尤处理方法: 千 4尤消除、 千 4尤随机化和千 扰协调。 其中, 千扰消除是通过在用户端利用处理增益来进行千扰压制; 千 扰随机化是通过随机化千扰信号来进行千扰压制; 千扰协调 (Inter-Cell Interference Coordination, 简称为 ICIC ) 的核心是通过多个小区间资源的合 理分配, 使得相邻小区的边缘用户的资源尽量正交, 从而减小相邻小区边缘 用户的千扰。 由于千扰协调使用灵活, 实现简单且效果理想, 成为小区间千 4尤处理技术的主流。
ICIC分为静态( Static )ICIC、动态( Dynamic )ICIC和半静态( Semi Static ) ICIC, 其中, 静态千 4尤协调 (Static ICIC ) 对于资源的限制太多, 对频选等 性能的影响比较大; 动态千扰协调的信令开销较大, 基站间信令交互延时较 长; 半静态千 4尤协调可以在一定程度上克 艮静态 ICIC和动态 ICIC的缺点。 半静态千扰协调的关键就是基站间通过 X2 接口来传递小区间负载信息 ( Load Information ), 以用于获取邻区的资源占用信息, 并以此作为本小区 资源分配的依据。 才艮据现有的协议, 负载信息主要包括以下信息: 小区信息: 源小区的小 区 ID; 上行高千 4尤指示(High Interference Indication, 简称为 ΗΠ )信息; 下 行相对窄带发射功率 ( Relative Narrowband Tx Power, 简称为 RNTP )信息; 上行过载指示 (Overload Indication, 简称为 OI )信息。 其中, RNTP信息的 产生是通过对指定资源单元 ( Resource Element, 简称为 RE ) 上功率的测量 来产生的,这种情况下需要物理层根据测量的对应 RE的功率大小进行上报, 基站然后根据该上报值进行 RNTP信息位的计算和 RNTP信息的产生。 这种 产生方法依赖于物理层测量上 4艮给 MAC层的单位 RE发射功率 ( Energy Per RE, 简称为 EPRE ) 的准确性。 而目前物理层测量和上艮的发射功率艮难故 到准确, 从而会对资源的分配的准确度带来影响。 发明内容 本发明的主要目的在于提供一种小区间千扰协调信息的处理方案, 以至 少解决上述问题。 根据本发明的一个方面, 提供了一种小区间千扰协调信息的处理方法, 包括: 确定小区中的小区边缘用户在预定时间间隔内占据的资源块的数量; 将所述小区的千扰协调信息中与所述数量相等的比特的值设置为 1; 根据所 述小区的小区边缘用户专属资源的范围, 将所述比特值为 1的比特位按照预 定的扩展顺序在带宽上进行排列; 所述小区向所述相邻小区发送所述千扰协 调信息。 优选地, 确定所述小区中的小区边缘用户在所述预定时间间隔内占据的 资源块的数量包括: 在一定时长内统计所述小区边缘用户在占据的资源块的 总数; 使用所述总数计算所述小区边缘用户在预定时间间隔内平均占据的资 源块的数量。 优选地, 所述预定时间间隔为传输时间间隔。 优选地, 所述小区向所述相邻小区发送所述千扰协调信息包括: 将所述 千扰协调信息与上一次得到的千扰协调信息中的对应的比特位依次进行比 较; 如果两个比特图中的值不相同的比特的数量超过阈值, 则向所述相邻小 区发送所述千扰协调信息。 优选地, 还包括: 所述小区才艮据本小区的千扰协调信息和来自所述相邻 小区的千扰协调信息进行资源的分配。 优选地, 所述小区统计在预定时间段内接收到的所述相邻小区发送的千 扰协调信息, 得到所述来自所述相邻小区的千扰协调信息。 优选地, 所述小区统计在预定时间段内接收到的所述相邻小区发送的千 扰协调信息包括: 所述小区对所述预定时间段内接收的所述相邻小区的千扰 协调信息进行按比特位进行求和或加权求和。 优选地, 根据所述小区的小区边缘用户专属资源的范围, 将所述比特值 为 1的比特位按照预定的扩展顺序在带宽上进行排列包括: 所述小区和处于 同一基站的其他两个相邻小区的小区边缘用户专属资源占用不同的频率范 围; 小区边缘用户专属资源占用带宽最左段的频率范围的小区的千扰协调信 息中与第一预定资源块对应的比特位为 1 , 其余的比特位为 0, 其中, 所述 第一预定资源块为本小区的小区边缘用户专属资源按从小到大顺序排列之后 的前 Ν个资源块, Ν为本小区的小区边缘用户在预定时间间隔内占据的资源 块的数量; 小区边缘用户专属资源占用带宽中间段的频率范围的小区的千扰 协调信息中与所述第二预定资源块对应的比特位为 1 , 其余的比特位为 0, 其中, 所述第二预定资源块为本小区的小区边缘用户专属资源按从中间往两 边顺序排列之后的后 Ν个资源块; 小区边缘用户专属资源占用带宽第三段的 频率范围的小区的千扰协调信息中与所述第三预定资源块对应的比特位为 1 , 其余的比特位为 0, 其中, 所述第三预定资源块为本小区的小区边缘用户 专属资源按从大到小顺序排列之后的中间的 Ν个资源块。 根据本发明的另一个方面, 还提供了一种小区间千扰协调信息的处理装 置, 位于基站的媒体访问控制层, 包括: 资源数据统计模块, 设置为确定小 区中的小区边缘用户在预定时间间隔内占据的资源块的数量; 千扰协调信息 产生模块; 设置为将所述小区的千扰协调信息中与所述数量相等的比特的值 设置为 1; 并根据所述小区和所述小区的相邻小区的小区边缘用户专属资源 的范围, 将所述小区的千扰协调信息中的值为 1的比特位按照预定的扩展顺 序在带宽上进行排列; 千扰协调信息发送模块, 设置为向所述相邻小区发送 所述千扰协调信息。 优选地, 还包括: 千扰协调信息接收模块, 设置为接收来自所述相邻小 区的千扰协调信息。 通过本发明, 釆用确定小区中的小区边缘用户在预定时间间隔内占据的 资源块的数量; 将该小区的千扰协调信息中与上述数量相等的比特的值设置 为 1 ; 根据该小区的小区边缘用户专属资源的范围, 将比特值为 1的比特位 按照预定的扩展顺序在带宽上进行排列; 该小区向相邻小区发送千扰协调信 息。 解决了相关技术中基站根据物理层测量上报的信息来产生 RNTP信息而 导致有可能对资源分配的准确度带来影响的问题, 提高了基站资源分配的准 确度从而降低了小区间的千扰。 附图说明 此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部 分, 本发明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的 不当限定。 在附图中: 图 1是根据本发明实施例的小区间千扰协调信息的处理方法的流程图; 图 2是根据本发明实施例的 RNTP产生过程中不同小区的 RNTP位图扩 展方向的示意图; 图 3 是根据本发明实施例的小区间千扰协调信息的处理装置的结构框 图; 图 4 是根据本发明实施例的小区间千扰协调信息的处理装置的结构框 图; 图 5是才艮据本发明实施例二的 RNTP产生过程的流程图; 图 6是才艮据本发明实施例二的 RNTP接收过程的流程图; 图 7是 居本发明实施例二装置的结构框图; 图 8是才艮据本发明实施例五的 RNTP产生过程中不同小区的 RNTP位图 扩展方向的示意图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是, 在 不冲突的情况下, 本申请中的实施例及实施例中的特征可以相互组合。 实施例一 在本实施例中提供了一种小区间千扰协调信息的处理方法, 图 1是根据 本发明实施例的小区间千扰协调信息的处理方法的流程图, 该流程包括如下 步骤: 步骤 S 102,确定小区中的小区边缘用户在预定时间间隔内占据的资源块 ( Resource Block , 简称为 RB ) 的数量; 步骤 S 104,将该小区的千扰协调信息中与上述数量相等比特的值设置为
1; 步骤 S 106, 根据该小区的小区边缘用户专属资源的范围, 将该小区的千 扰协调信息中的值为 1的比特位按照预定的扩展顺序在带宽上进行排列; 步骤 S 108, 该小区向相邻小区发送千扰协调信息。 通过上述步骤, 小区根据媒体接入控制 (Media Access Control, 简称为 MAC )层的资源块的数量生成千 4尤协调信息(例如, RNTP信息、 ΗΠ信息), 从而解决了根据物理层进行测量上报来生成信息所带来的问题。 优选地, 在步骤 S 102 中可以在一定时长内统计该小区边缘用户占据的 资源块的总数; 使用所述总数计算该小区边缘用户在预定时间间隔内平均占 据的资源块的数量。 需要说明的是, 步骤 S 102中的"一定时长"可以根据实际 的情况来确定, 釆用该时长的目的是为了计算一段时间间隔的小区边缘用户 平均占用的资源块的数量。 例如, 在一段统计时间 (可以使用传输时间间隔 的整数倍, 如 50或 100TTI ) 内统计的被小区边缘用户占据的 RB的总数, 然后,计算该统计时间包括多少个传输时间间隔( Transmission Time Interval, 简称为 TTI ), 从而得到每个 ΤΤΙ中小区边缘用户占据的 RB数量的平均值。 优选地, 在步骤 S 108, 可以首先进行判断, 然后再确定是否发送该千 4尤 协调信息。 例如, 可以将这次得到的千扰协调信息与上一次得到的千扰协调 信息中的对应的比特位依次进行比较; 如果两个比特图中的值不相同的比特 的数量超过阈值, 则向相邻小区发送此次的千扰协调信息。 优选地, 该小区还可以接收来自相邻小区的千扰协调信息, 然后, 根据 本小区的千扰协调信息和相邻小区的千扰协调信息进行资源的分配。 例如, 该小区可以统计在预定时间段内接收到的相邻小区发送的千扰协调信息 (例 如, 对在该预定时间内接收到的相邻小区发送的千扰协调信息按比特位进行 求和或加权求和;),得到所述来自所述相邻小区的千扰协调信息。 需要说明书 的是, 本段中的 "预定时间段"可以根据实际的情况进行选择, 例如, 可以选 择 10个 TTI或 20个 TTI。 下面以同一基站的三个小区为例进行说明, 对于同一基站而言, 小区和 两个相邻小区的小区边缘用户专属资源占用不同的频率范围; 其中, 小区边 缘用户专属资源带宽最左段的频率范围的小区的千扰协调信息中与第一预定 资源块对应的比特位为 1 , 其余的比特位为 0 , 其中, 第一预定资源块为本 小区的小区边缘用户专属资源按从小到大顺序排列之后的前 Ν个资源块, Ν 为本小区的小区边缘用户在预定时间间隔内占据的资源块的数量; 小区边缘 用户专属资源带宽中间段的频率范围的小区的千扰协调信息中与第二预定资 源块对应的比特位为 1 , 其余的比特位为 0, 其中, 第二预定资源块为本小 区的小区边缘用户专属资源按从中间往两边顺序排列之后的后 Ν个资源块; 小区边缘用户专属资源带宽第三段的频率范围的小区的千扰协调信息中与第 三预定资源块对应的比特位为 1 , 其余的比特位为 0 , 其中, 第三预定资源 块为本小区的小区边缘用户专属资源按从大到小顺序排列之后的中间的 Ν个 资源块。 下面结合图 2以 RNTP的产生为例进行说明。 图 2是才艮据本发明实施例中 RNTP产生过程中不同小区的 RNTP位图扩 展方向的示意图, 该图是针对频率分三段, 没有中心专用频带 IC 的情况, 如图 2所示, 带背景的部分为本小区边缘用户专用频带 OC, 不带背景的部 分二分为本小区中心用户可占用资源 BC。 ^_定三个小区为基站的三个扇区: 扇区 1、 扇区 2和扇区 3。 则第一个 RNTP的信息位产生如下:
= |l, e本小区 OC资源按从小到大顺序的 N个 R5
需要说明的是上述公式只符合边缘专属资源预分配在 [0,OC]区域的扇区 1; 对于边缘专属资源预分配在位于 [OC,2OC]的扇区 2 , RNTP位图是本小区 OC 资源从中间往两边扩展, 公式与上述公式类似, 在此不再赞述; 而对于 边缘专属资源预分配在 [2OC,3OC]的扇区 3 , RNTP 信息是从大到小进行扩 展。 通过设置扩展方向可以尽可能的减少资源分配中的碎片。 图 3 是根据本发明实施例的小区间千扰协调信息的处理装置的结构框 图, 该装置位于基站的媒体访问控制层, 如图 3所示, 该装置包括: 资源数 据统计模块 32、 千扰协调信息产生模块 34和千扰协调信息发送模块 36 , 下 面对此进行说明。 资源数据统计模块 32 ,设置为确定小区中的小区边缘用户在预定时间间 隔内占据的资源块的数量; 千扰协调信息产生模块 34 连接至资源数据统计 模块 32 ,该模块设置为在该小区的千扰协调信息中设置与上述数量相等的值 为 1的比特; 并根据该小区和相邻小区的小区边缘用户专属资源的范围, 将 该小区的千扰协调信息中的值为 1的比特位按照预定的扩展顺序在带宽上进 行排列在频率上相互错开排列; 千扰协调信息发送模块 36 连接至千扰协调 信息产生模块 34 , 该模块设置为向相邻小区发送千扰协调信息。 图 4 是根据本发明实施例的小区间千扰协调信息的处理装置的结构框 图, 如图 4所示, 该装置还包括: 千扰协调信息接收模块 42 , 该模块设置为 接收来自相邻小区的千扰协调信息。 实施例二 在本实施例中提供了一种可以不依赖于物理层上报的 EPRE, 由 MAC 层独立产生 RNTP信息并进行处理的一种方法及装置。 本实施例综合了实施 例一及其优选实施例。 需要说明的是, 上行的 ΗΠ信息同样可以釆用相同的 过程来产生, 下面以 RNTP信息产生为例进行说明, 对于 ΗΠ的产生在本实 施例中不再赞述。 图 5是才艮据本发明实施例二的 RNTP产生过程的流程图, 该流程包括如 下步骤: 步骤 S501 , 每个小区每个 TTI都统计小区内边缘用户占用的 RB数, 直 到达到预先设定的统计周期。 如果没有到达统计周期, 则继续该步骤, 该 RB 数目持续累加, 否则, 则进入步骤 S502。 步骤 S502,计算该段统计时间内每个小区平均每个 TTI被边缘用户占据 的 RB数目。 步骤 S 503 , 根据预先设定的边缘用户小区专属资源 (OC)范围, 和各小区 平均每个 ΤΤΙ 边缘用户占据的 RB 数目, 产生本小区的 RNTP Per PRB ( Physical RB )信息 (以下简称为 RNTP信息;)。 步骤 S504, 4巴此次产生的 RNTP Per PRB信息和上个统计周期本区的 RNTP Per PRB信息进行比较; ;;口果两次 RNTP Per PRB信息不同的位数大于 预先设定的门限值 RNTPDiffThp, 则执行步骤 S505 , 将该信息发送给邻区; 否则, 则不发送, 且把本周期内的 RNTP Per PRB信息按位清空, 准备进入 下一个周期的统计。 优选地, RNTPDiffThp默认可以为 0, 表示无论本周期 RNTP信息更新与否都发送给邻区, 可以根据实际需要进行调整, 调整范围 最大不超过实际带宽对应的 RB数。 图 6是才艮据本发明实施例二的 RNTP接收过程的流程图, 该流程包括如 下步骤: 步骤 S601 , 定义 RNTP统计接收周期, 定义定时器; 步骤 S602 ,每个小区每个 TTI都检测是否有邻区发送过来的 RNTP信息; 如果有, 接收邻小区的 RNTP信息, 并记录邻小区 ID; 步骤 S603 ,将接收到的 RNTP信息与之前接收到的 RNTP信息进行处理, 例如, 按位求和、 加权求和等; 判断是否达到了 RNTP的接收统计周期, 如 果没有达到则继续该步^^ 如果达到了则进入下一个步^^ 步骤 S604,根据接收到的 RNTP的按照上述方法处理得到的 RNTP千扰 指示和本小区的 RNTP Per PRB信息, 完成资源位图更新, 输出给资源分配 模块; 本小区资源位置分配模块根据本区 RNTP Per PRB信息及邻区 RNTP 千扰指示进行资源分配。 图 7是 居本发明实施例二装置的结构框图,如图 7所示,该装置包括: 资源数目统计模块, RNTP信息产生模块, RNTP信息发送模块和 RNTP信 息接收模块。 该装置位于 eNB的 MAC层。 资源数目统计模块, 主要是周期性对各小区边缘用户的资源占用情况进 行统计, 用以后续 RNTP Per PRB信息的产生;
RNTP信息产生模块, 主要是根据资源数目统计模块统计的资源占用数 目和预定义的边缘用户专属资源(OC)的范围进行 RNTP Per PRB位图信息的 产生, 其中 OC资源才艮据小区的不同而位于小区带宽的不同频率范围; RNTP Per PRB位图信息表示本小区边缘用户将要占用哪些位置, PRB是位置信息, RNTP是占用标志, 1表示占用, 0表示不占用。
RNTP信息发送模块, 主要是 居新产生的 RNTP信息和上个统计周期 的 RNTP信息进行按位比较,如果不同的位数大于预设定的 RNTP发送门限, 则表示两次统计的结果有了较大的区别, 边缘 UE的资源占用情况已经发生 了比较大的变化, 则进行此次新 RNTP消息的发送; 否则, 说明两次比较结 果差异不大, 对资源分配影响不大, 为了节省信令, 可以釆取不发送的策略。
RNTP信息接收模块, 主要是在统计接受周期内循环接收邻区的 RNTP 信息, 以避免多个邻区的 RNTP信息不是同一时刻到达本区的现象; 统计周 期结束后, 按位求和之后的 RNTP信息输出给资源分配模块作参考。 通过本实施例, 一方面, RNTP的产生可以脱离物理层上 4艮的 EPRE的 影响, 摆脱物理层功率测量上 4艮不准的限制; 另一方面, 基于 CEU 分配到 得 RB产生 RNTP的策略通过边缘用户占用资源的多少和比例, 不仅直接反 映了当前小区不同资源位置上本小区的边缘用户资源情况, 能更加准确和直 接的反映出邻小区边缘对于本小区部分资源位置上是否有千扰以及千扰强度 的大小, 对于资源位置分配的调整和影响都艮准确。 实施例三 本实施例提供的 RNTP产生处理的流程如下: 每个下行子帧记录 CEU满足保证比特速率 ( Guaranteed Bit Rate, 简称 为 GBR ) 所需的 RB数量 C, 其中, k = sysSFN, sysSFN - 1, ... , sysSFN - DlRntpRptlnterval - 1
DlRntpRptlnterval为 RNTP上 4艮周期, 缺省为 UlOIRptlnterval (上行 OI 的上 4艮周期) 或者其整数倍。 这样可以减少 Load Indication的交互。 如果在 k子帧没有 CEU被调度, 则 t = 0。 统计一个周期内为满足边缘 UE ( CEU )的 GBR所分配的 RB 为 sysSFN
该周期默认取 100个 ττι:
Figure imgf000012_0001
, 即把各小区 k = sysSFN -DlRntpRptlnterval -1
在统计周期内边缘 UE占用的 RB数目累加起来,然后计算每个 TTI满足边缘 UE的 GBR所需的平均 RB it N R r TTT ,
GBR N: GBR
N CEU
CEU, TTI ―
' 1 DlTtilnDlRntpRptlnterval 其中,
Figure imgf000012_0002
为 RNTP上报周期内的下行子帧个数。 RNTP的信息位产生 ¾口下:
Figure imgf000012_0003
其中此公式的说明只符合边缘专属资源预分配在 [o,oc]区域的扇区 1; 对于边缘专属资源预分配在位于 [OC,2OC]的扇区 2 , RNTP位图是本小区 OC 资源从中间往两边扩展; 而对于边缘专属资源预分配在 [2OC,3OC]的扇区 3 , RNTP信息是从大到小进行扩展。 设置扩展方向的目的是尽可能的减少资源 分配中的碎片。 冊 TPn RNTP。ld ^较, 如果 numO/Bits(RNTPnew xor RNTPold) > RNTPDiffThreshold , 则 RN P„ew为最终发送给邻区的 RNTP。 RNTPDiffThreshold为预设值的 一个门限值, 设置此参数的目的是, 如果 RNTP在两次报告期间没有很大改 变则可以减少 RNTP的发送; 该参数默认值为 0, 表示两次比较结果无论如 何都发送本次产生的 RNTP信息给邻区。 该参数可以根据需要进行调整, 最 大不超过下行带宽的 RB数目。 -RNTPold = RNTP , 用于下次比较。 RNTP 的接收处理算法用来分析本 小区接收到的相邻小区的 RNTP信息。
RNTP接收处理的流程如下: 定义一个 RNTP处理周期 , 因为不同的相邻小区不一定同时发送
RNTP„ 默认为 10个 TTI, 可以才艮据需要调整; 最大不超过 20个 TTI; 使用 周期定时器触发 RNTP的下述处理流程。 每个 TTI都读取和记录邻区发送的 RNTP信息。 如果没有到 RNTP处理 周期7 ^P , 则持续读取邻区的 RNTP信息。 将接收到的 RNTP进行按位"求和"操作得到的 RNTP指示用 R T^"1表 示, 即:
RNTP = RNTPcdM , 其中, RNTPceUM为相邻小区 ( cellld ) 发到本小区的 RNTP。 、cdlld }为 相邻小区 cellld的集合;这里求和的方法只是举例说明对接收到的邻区 RNTP 信息如何操作, 并不是唯一的处理方法。 完成本次 RNTP信息的统计处理, 进行资源位图的更新。 由于千扰协调中频段划分的不同, RNTP 的产生极其扩展方向会有所区 别。 为了尽可能详尽的阐述本实施例, 下面通过实施例四和实施例五来做进 一步说明。 实施例四 考虑预先分配的频率范围分三段, 且针对下行 RNTP信息进行产生和处 理的情况, 如图 2所示, 该图是针对频率分三段, 没有中心专用频带 IC的 情况, 如图 2所示, 带背景的部分为本小区边缘用户专用频带 OC, 不带背 景的部分二分为本小区中心用户可占用资源 BC。 在上述预分配频带的情况下, 考虑一个边缘用户数目不多, 小区负载较 轻, GBR要求不高, 边缘用户占用资源较少, 不会超过边缘用户专属资源范 围 OC的简单场景。 在这种场景下, RNTP产生及整个处理的流程如下: 每个小区在每个下行子帧记录小区内边缘用户满足 GBR所需的 RB数 量; 如果不满足统计周期, 则继续统计并对 RB数目求和; 如果已经达到统 计周期, 则求出每个小区平均到每个 TTI的边缘 UE分配到的 RB数, 并根 据该小区边缘 UE的平均 GBR满足情况对该 RB数作调整,设最后得到的该 RB数目为 Nrb, 各个扇区维护自己的 Nrb值。 在边缘用户 RB需求不大的情况下, 针对一个基站的三个扇区, 在不同 频带上进行 RNTP位图信息的生成: 第一个扇区, 在 [0,OC]带宽内从左到右 把 Nrb个位置 1; 如果还剩下 OC-Nrb个位, 则将其置 0。 同样, 对于第二个 扇区, 在 [OC,2OC]带宽内从中间 ( OC*3/2 )往两边各扩展 Nrb/2位, 把扩展 到的位置 1; 如果有剩余位则置为 0。 同样, 对于第三个扇区, 在 [2OC,3OC] 带宽内从右向左扩展 Nrb位, 扩展到的位置 1 , 否则置 0。 在当前场景下, 每个小区基本在自己的边缘用户专属资源范围 OC内就 能满足边缘用户的需求, 所以资源分配的时候考虑把这些位置分配给边缘, 其余位置分配给中心, 小区边缘之间在频率上互相错开, 从而达到了千扰协 调的目的。 实施例五 图 8是才艮据本发明实施例五的 RNTP产生过程中不同小区的 RNTP位图 扩展方向的示意图, 该图针对频率分四段, 有中心专用频带 IC 的情况。 其 中, 考虑预先分配的频率范围分四段, 且发送信息为上行 ΗΠ的情况, 带斜 紋背景的部分为本小区边缘用户专用频带 OC, 带横线背景的部分为本小区 中心用户可占用和本小区边缘用户可借用的资源; 如果 OC专用频带可以满 足边缘用户的需求, 则 BC部分资源全部分配给本小区中心用户使用; IC为 小区中心用户专用。 在上述预分配频带的情况下, 考虑一个边缘用户数目较多, 小区负载较 大, GBR要求比较高, 边缘用户占用资源比较多, 甚至会超过预分配的边缘 用户专属资源范围 OC 的复杂场景。 在这种场景下, ΗΠ产生及整个处理的 流程如下: 每个小区在每个下行子帧记录小区内边缘用户满足 GBR所需的 RB数 量; 如果不满足统计周期, 则继续统计并对 RB数目求和; 如果已经达到统 计周期, 则进入下一步骤; 求出每个小区平均到每个 TTI的边缘 UE分配到的 RB数, 并根据该小 区边缘 UE的平均 GBR满足情况对该 RB数作调整, 设最后得到的该 RB数 目为 Nrb, 各个扇区维护自己的 Nrb值, 进入下一步 4聚; 在边缘用户 RB需求比较的情况下, 针对一个基站的三个扇区, 在不同 频带上进行 ΗΠ位图信息的生成: 第一个扇区, 在 [0,OC]带宽内从左到右把 Nrb个位置 1 , 在此种场景下, Nrb可能会向右扩展突破 OC的范围, 进入第 二个扇区的专属资源范围内, 极端情况下可能会进入第三个扇区的专属资源 范围。 同样, 对于第二个扇区, 在 [OC,2OC]带宽内从中间 (OC*3/2 )往两边 各扩展 Nrb/2位, 把扩展到的位置 1; 其向两边各自可能突破 [OC,2OC]的限 制, 分别进入第一个扇区和第三个扇区的边缘用户专属资源范围。 同样, 对 于第三个扇区, 在 [2OC,3OC]带宽内从右向左扩展 Nrb位, 扩展到的位置 1 , 否则置 0; 同样, 置 1 的位数同样可能会扩展到第二个和第一个扇区的边缘 用户专属资源范围。 在这种情况下, 调度策略就要稍微复杂些; 每个小区在分配资源给边缘 用户时, 需要参考两个信息: 第一, 本小区的 HII位图信息指示, 指示为 1 的位数表示本小区将要占用的资源位置, 邻区在收到本区的该 ΗΠ位图信息 的时候应该避免把此位置分配给边缘用户; 第二, 对本小区收到的邻区 ΗΠ 信息的进行处理, 比如说按位加和, 该信息表示邻区发送的 ΗΠ信息在本区 对应资源位置上的叠加, 叠加的和越大, 表明邻区边缘对于该位置上的影响 越大, 本区进行资源分配的时候就越要避免把这些位置分配给边缘用户。 在当前场景下, 每个小区在自己的边缘用户专属资源范围 OC内已经不 能满足边缘用户的需求, 各个小区的专属资源之间会有部分的重叠区域, 千 扰必然存在; 此时, 资源分配需要按照千扰指示从小到大的原则来寻找资源 分配, 尽量把小区边缘之间在频率上互相千扰比较大的地方错开, 从而达到 了千扰控制的目的。 综上所述, 由于本发明的上述实施例中产生的 RNTP和 ΗΠ信息会对小 区根据小区间千扰进行资源分配的策略产生影响, 从而可以达到小区间千扰 的协调和资源合理的分配。 显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可 以用通用的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布 在多个计算装置所组成的网络上, 可选地, 它们可以用计算装置可执行的程 序代码来实现, 从而, 可以将它们存储在存储装置中由计算装置来执行, 并 且在某些情况下, 可以以不同于此处的顺序执行所示出或描述的步骤, 或者 将它们分别制作成各个集成电路模块, 或者将它们中的多个模块或步骤制作 成单个集成电路模块来实现。 这样, 本发明不限制于任何特定的硬件和软件 结合。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本 领域的技术人员来说, 本发明可以有各种更改和变化。 凡在本发明的 ^"神和 原则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的保护 范围之内。

Claims

权 利 要 求 书 一种小区间千扰协调信息的处理方法, 包括:
确定小区中的小区边缘用户在预定时间间隔内占据的资源块的数 量;
将所述小区的千扰协调信息中与所述数量相等的比特的值设置为
1;
根据所述小区的小区边缘用户专属资源的范围, 将所述比特值为
1的比特位按照预定的扩展顺序在带宽上进行排列;
所述小区向所述相邻小区发送所述千扰协调信息。 根据权利要求 1所述的方法, 其中, 确定所述小区中的小区边缘用户 在所述预定时间间隔内占据的资源块的数量包括:
在一定时长内统计所述小区边缘用户在占据的资源块的总数; 使用所述总数计算所述小区边缘用户在预定时间间隔内平均占据 的资源块的数量。 根据权利要求 1或 2所述的方法, 其中, 所述预定时间间隔为传输时 间间隔。 根据权利要求 1所述的方法, 其中, 所述小区向所述相邻小区发送所 述千扰协调信息包括:
将所述千扰协调信息与上一次得到的千扰协调信息中的对应的比 特位依次进行比较;
如果两个比特图中的值不相同的比特的数量超过阈值, 则向所述 相邻小区发送所述千扰协调信息。 根据权利要求 1或 4所述的方法, 其中, 还包括:
所述小区根据本小区的千扰协调信息和来自所述相邻小区的千扰 协调信息进行资源的分配。
6. 根据权利要求 5所述的方法, 其中, 所述小区统计在预定时间段内接 收到的所述相邻小区发送的千 4尤协调信息, 得到所述来自所述相邻小 区的千扰协调信息。
7. 根据权利要求 6所述的方法, 其中, 所述小区统计在预定时间段内接 收到的所述相邻小区发送的千扰协调信息包括:
所述小区对所述预定时间段内接收的所述相邻小区的千扰协调信 息进行按比特位进行求和或加权求和。
8. 根据权利要求 1所述的方法, 其中, 根据所述小区的小区边缘用户专 属资源的范围, 将所述比特值为 1 的比特位按照预定的扩展顺序在带 宽上进行排列包括:
所述小区和处于同一基站的其他两个相邻小区的小区边缘用户专 属资源占用不同的频率范围;
小区边缘用户专属资源占用带宽最左段的频率范围的小区的千扰 协调信息中与第一预定资源块对应的比特位为 1 , 其余的比特位为 0, 其中, 所述第一预定资源块为本小区的小区边缘用户专属资源按从 ,J、 到大顺序排列之后的前 N个资源块, N为本小区的小区边缘用户在预 定时间间隔内占据的资源块的数量;
小区边缘用户专属资源占用带宽中间段的频率范围的小区的千扰 协调信息中与所述第二预定资源块对应的比特位为 1 , 其余的比特位 为 0, 其中, 所述第二预定资源块为本小区的小区边缘用户专属资源 按从中间往两边顺序排列之后的后 N个资源块;
小区边缘用户专属资源占用带宽第三段的频率范围的小区的千扰 协调信息中与所述第三预定资源块对应的比特位为 1 , 其余的比特位 为 0, 其中, 所述第三预定资源块为本小区的小区边缘用户专属资源 按从大到小顺序排列之后的中间的 N个资源块。
9. 一种小区间千扰协调信息的处理装置, 位于基站的媒体访问控制层, 包括:
资源数据统计模块, 设置为确定小区中的小区边缘用户在预定时 间间隔内占据的资源块的数量; 千扰协调信息产生模块; 设置为将所述小区的千扰协调信息中与 所述数量相等的比特的值设置为 1 ; 并根据所述小区和所述小区的相 邻小区的小区边缘用户专属资源的范围, 将所述小区的千扰协调信息 中的值为 1的比特位按照预定的扩展顺序在带宽上进行排列;
千扰协调信息发送模块, 设置为向所述相邻小区发送所述千扰协 调信息。 根据权利要求 9所述的装置, 其中, 还包括:
千扰协调信息接收模块, 设置为接收来自所述相邻小区的千扰协 调信息。
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