WO2012068862A1 - 一种时频资源处理方法和装置 - Google Patents

一种时频资源处理方法和装置 Download PDF

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Publication number
WO2012068862A1
WO2012068862A1 PCT/CN2011/075327 CN2011075327W WO2012068862A1 WO 2012068862 A1 WO2012068862 A1 WO 2012068862A1 CN 2011075327 W CN2011075327 W CN 2011075327W WO 2012068862 A1 WO2012068862 A1 WO 2012068862A1
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Prior art keywords
time
frequency resource
resource block
terminal
frequency
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PCT/CN2011/075327
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English (en)
French (fr)
Inventor
罗薇
刘锟
鲁照华
李卫敏
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中兴通讯股份有限公司
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Publication of WO2012068862A1 publication Critical patent/WO2012068862A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/12Fixed resource partitioning
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0037Inter-user or inter-terminal allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a time-frequency resource processing method and apparatus. Background technique
  • the scheduling allocation of all resources of the system is usually performed by the base station, for example, the resource allocation situation when the base station performs downlink transmission and the resources that can be used when the terminal performs uplink transmission, etc. All are scheduled and allocated by the base station.
  • Orthogonal Frequency Division Multiplexing when downlink data transmission is performed between a base station and a different terminal in the same cell, since these downlinks are orthogonal to each other, intra-cell interference can be avoided.
  • the downlink between different cells may not be orthogonal, so each terminal may be subject to downlink interference from base stations of other neighboring cells, i.e., inter-cell interference.
  • FFR Fractional Frequency Reuse
  • Reusel/3 also known as Reuse3
  • one time-frequency resource block in FP " FP3 , FP4 is assigned to three One of the neighboring cells, and the other two cells cannot use the time-frequency resource, or need to use the method of limiting the transmit power of the sub-carrier of the time-frequency resource to use the time-frequency resource;
  • ⁇ Time-frequency reuse factor The value is 1 (ie, Reuse 1), and the three adjacent cells described above can use the time-frequency resource.
  • the terminal users are divided into two types, that is, an inner ring terminal (a terminal that is closer to the base station or a higher signal to noise ratio) and an outer ring terminal (a terminal that is farther from the base station or has a lower signal to noise ratio), which is an inner ring.
  • the terminal allocates the time-frequency resource block FP1 of Reuse 1 or all time-frequency resource blocks, and the outer ring terminal can only allocate one of F , 3, and FPA.
  • the FP is divided into two parts, the time-frequency reuse factor is 1 and the time-frequency reuse factor is N-1, and the values of N are generally 4 and 8.
  • the blocks are orthogonal. That is to say, the larger the value of N is, the smaller the interference of the small interval is. On the contrary, the smaller the value of N is, the larger the interference of the small interval is.
  • the time-frequency resources that can be utilized are also less.
  • the time-frequency resource utilization rate is determined by the value of N.
  • N the number of cells that suppress interference between cells.
  • it is at the expense of time-frequency resource utilization, which will significantly reduce the performance of the terminal located at the edge of the cell, thereby reducing customer satisfaction.
  • a main object of the present invention is to provide a time-frequency resource processing method and apparatus, which can further suppress inter-cell interference when the time-frequency resource utilization ratio is the same, and in particular, can improve the performance of a terminal located at a cell edge.
  • a time-frequency resource processing method comprising:
  • the dividing the entire time-frequency resource into a plurality of time-frequency resource blocks according to a weighted time-frequency reuse factor value including:
  • the dividing the second time-frequency resource block into the N 2 third time-frequency resource blocks includes: dividing each second time-frequency resource block into N 2 third time-frequency resource blocks in the frequency domain; Or, each second time-frequency resource block is divided into N 2 third time-frequency resource blocks in the time domain; or, each second time-frequency resource block is jointly divided into N in the time domain and the frequency domain. 2 third time-frequency resource blocks.
  • the terminal type is determined according to the following steps:
  • the channel information decision value is compared with a preset first judgment threshold and a second judgment threshold, respectively, and the terminal type is determined according to the comparison result.
  • the second judgment threshold is smaller than the first judgment threshold
  • the allocating the time-divided time-frequency resource blocks for the terminal includes:
  • the first time-frequency resource block is allocated to the inner ring terminal.
  • the method also includes:
  • the method further includes:
  • the process of determining a third time-frequency resource block includes:
  • the method also includes:
  • the inner ring terminal allocates the idle time-frequency resource in the determined third time-frequency resource block.
  • the method also includes:
  • the fourth time-frequency resource block is allocated to the inner ring terminal according to the location of the inner ring terminal.
  • the method also includes: According to the N-time time-frequency multiplexing factor, each time-frequency resource block that has been re-divided by N-1 is performed.
  • N is heavily divided, where N is an integer greater than 2;
  • the terminal is divided into an inner ring terminal and a N-type outer ring terminal; and an N-division time-frequency resource block is allocated for the inner ring terminal and the N-type outer ring terminal.
  • a time-frequency resource processing device comprising:
  • a weight division module configured to divide the entire time-frequency resource into multiple time-frequency resource blocks according to a weighted time-frequency reuse factor value
  • An allocating module is configured to allocate a time-division resource block after the double partitioning to the terminal according to the terminal type.
  • the one-bit division module is configured to: when the entire time-frequency resource is divided into multiple time-frequency resource blocks according to a weighted time-frequency reuse factor value,
  • the dual partitioning module is configured to: when the multiple time-frequency resource blocks are double-divided according to the dual time-frequency multiplexing factor value,
  • Each second time-frequency resource block is divided into N 2 third time-frequency resource blocks; the N 2 is equal to the double-time time-frequency reuse factor value.
  • the dual partitioning module is configured to: when each second time-frequency resource block is divided into N 2 third time-frequency resource blocks,
  • each second time-frequency resource block is divided into N 2 third time-frequency resource blocks in the frequency domain; or dividing each second time-frequency resource block into N 2 third time-frequency resources in the time domain Or; each second time-frequency resource block is jointly divided into N 2 third time-frequency resource blocks in the time domain and the frequency domain.
  • the device also includes:
  • a determining module configured to: after the double partitioning module performs the double partitioning, before the allocating the split time-frequency resource block to the terminal, the determining module determines the third time-frequency resource block used by the cell where the terminal is located;
  • the determining module is specifically configured to:
  • the device also includes:
  • the terminal classification module is configured to obtain a channel information decision value of the terminal, compare the channel information determination value with a preset first judgment threshold and a second judgment threshold, and determine a terminal type according to the comparison result.
  • the present invention divides the time-frequency resources in the traditional FFR into two, and allocates the time-frequency resource blocks after the double-division according to the terminal type; further suppresses the interference between the cells on the basis of ensuring the same time-frequency resource utilization. . DRAWINGS
  • 1A is a schematic diagram of a method for allocating time-frequency resources according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a method for dividing a terminal type according to an embodiment of the present invention
  • FIG. 4 is an SINR (Signal to Interference plus) for information decision value according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of an apparatus for allocating time-frequency resources according to an embodiment of the present invention.
  • the embodiment of the present invention further divides the time-frequency resource block on the basis of the traditional FFR, and reclassifies the user terminal, and cooperates with a reasonable resource allocation manner to further reduce the d, while ensuring the same time-frequency resource utilization rate. Interval interference, improving the total capacity of the system and the performance of the terminal located at the edge of the cell.
  • the present invention is applicable to an uplink communication system and a downlink communication system.
  • a method for allocating time-frequency resources includes:
  • Step 101 Divide the entire time-frequency resource into multiple time-frequency resource blocks according to a weighted time-frequency reuse factor value ( ⁇ is an integer greater than zero).
  • Step 102 Perform double partitioning on multiple time-frequency resource blocks according to the dual time-frequency reuse factor value N 2 (N 2 is an integer greater than zero).
  • Step 103 Allocate a time-divided time-frequency resource block to the terminal according to the terminal type.
  • a first time-frequency resource block with a time-frequency reuse factor of 1 is divided from the entire time-frequency resource, and the remaining time-frequency resources are divided into second time-frequency resource blocks; where is equal to one-time time-frequency complex With the factor value, the time-frequency reuse factor value of the second time-frequency resource block is Ni. That is to say, this step divides the entire time-frequency resource into Ni+1 FPs.
  • the first time-frequency resource block whose time-frequency reuse factor is 1 is represented by FP N1+1
  • the i-th second time-frequency resource block is represented; i is the first position parameter, and the value range of i is 1 to Ni.
  • the first time-frequency resource block size is 0, that is, the first time-frequency resource block with the time-frequency reuse factor of 1 is not divided.
  • each second time-frequency resource block is divided into N 2 third time-frequency resource blocks.
  • N 2 is equal to the double time-frequency reuse factor value
  • the time-frequency reuse factor value of the third time-frequency resource block is N 2 .
  • the ith second time-frequency resource block FPi is divided into N 2 third time-frequency resource blocks.
  • the FPij represents the jth third time-frequency resource block in the i-th second time-frequency resource block, where j is the second location parameter.
  • the value range of i is 1 to N l j and the value ranges from 1 to N 2 .
  • Each second time-frequency resource block is divided into N 2 third time-frequency resource blocks in the time domain and the frequency domain.
  • step 102 further includes:
  • the third time-frequency resource block used by the cell corresponding to the cell number is determined according to the cell number (Cell_ID). Specifically include:
  • Methods for determining i and j include, but are not limited to, the following methods:
  • step 103 the terminal types are classified into three types: an inner ring terminal, a first outer ring terminal, and a second outer ring terminal.
  • the method of specifically dividing the terminal type is introduced in FIG. 2.
  • the allocation of the double-divided time-frequency resource blocks to the terminal includes: Allocating a determined third time-frequency resource block FPij for the second outer ring terminal in the cell;
  • the first time-frequency resource block FP N1+1 is allocated to the inner ring terminal in the cell.
  • the inner ring terminal in the cell may also allocate an idle time-frequency resource block in the entire time-frequency resource;
  • the time-frequency resource block of the first outer ring terminal cannot meet the requirement of the first outer ring terminal in the cell, allocate the idle time-frequency resource in the determined third time-frequency resource block to the first outer ring terminal in the cell.
  • the inter-cell interference can be further reduced under the premise of ensuring the same time-frequency resource utilization, and the second outer-loop terminal can be allocated a specific time-frequency resource block, thereby improving the second outer cell.
  • the performance of the ring terminal increases the total system capacity.
  • the embodiment of the present invention further includes:
  • the inner ring terminal is divided into a first type of inner ring terminal and a second type of inner ring terminal according to the location of the inner ring terminal. Specifically, according to the positive and negative angles between the inner loop terminal and the main antenna direction of the cell antenna, the inner loop terminal having a negative angle with the main lobe direction of the cell is divided into the second inner loop terminal.
  • the first time-frequency resource block with the time-frequency reuse factor value of 1 is divided into a plurality of fourth time-frequency resource blocks.
  • the fourth time-frequency resource block is allocated to the inner ring terminal according to the location of the inner ring terminal.
  • a priority may be set for the first type of inner ring terminal and the second type of inner ring terminal, and the fourth time-frequency resource block is allocated to the first type of inner ring terminal and the second type of inner ring terminal according to the priority order. Or assigning a fourth time-frequency resource block to the first type of inner ring terminal in a sequential order, and allocating a fourth time-frequency resource block to the second type of inner ring terminal in reverse order, which can further suppress interference under non-full load conditions.
  • a method for dividing a terminal type includes: Step 201: Acquire a channel information decision value CI of the terminal.
  • the CI may be a distance parameter D that indicates that the user arrives at the base station, and the size of the D is inversely proportional to the distance.
  • the CI may also be a parameter S that characterizes the quality of the signal transmitted and received by the terminal user. S, S may be at least one of the following:
  • RSSI Receiveived Signal Strength Indication
  • Step 202 Compare the decision value CI with the first judgment threshold A1 and the second judgment threshold A2, respectively, and determine the terminal type in the cell according to the comparison result.
  • the first judgment threshold A1 and the second judgment threshold A2 may be determined in advance, and the type of CI acquired in step 201 must correspond to A1 and A2.
  • the values of A1 and A2 corresponding to D are different from the values of A1 and A2 corresponding to S.
  • Determining the terminal types in the cell according to the comparison result includes:
  • the terminal is the first outer ring terminal
  • the terminal is an inner ring terminal.
  • one or more of the parameters N 2 , A1, A1, and FP N1+1 may be specified by the protocol and configured into the base station; or may be determined by the base station; or may be determined by the upper layer network element of the base station. After the base station is notified.
  • the upper layer network element may be: a relay device, a base station controller, an access service network, a connection service network, a core network gateway, etc.; and after determining A1 and A2, the designated CI is D or S.
  • the access terminal since the location of the access terminal is random and moves with time, the channel conditions of the terminal are also constantly changing; therefore, the inner ring terminal and the first outer ring in the small area change with time.
  • the number of terminals and the second outer ring terminal is constantly changing.
  • the time-frequency resources are allocated reasonably, and the values of A1 and A2 can also be adjusted.
  • the base station adjusts the values of A1 and A2 according to the cell load.
  • Trigger conditions for adjusting the threshold include, but are not limited to, the following:
  • Method 1 Timed by the timer, reaching a certain time period T.
  • the adjustment threshold may be specified by the protocol or may be configured by the base station.
  • Manner 2 The upper layer unit notifies the base station to perform adjustment.
  • the adjustment criteria of A1 and ⁇ 2 can satisfy any one or more of the following:
  • the base station counts the ratio of the number of first outer ring terminals to the number of terminal users. If the ratio increases significantly, Then the size of A1 can be reduced.
  • the cell IOT Interference over Thermal
  • a resource mapping diagram with Ni 3 as an example, wherein a time-frequency resource block with a left oblique line indicates a second time-frequency resource block FPi corresponding to a different value of i, and a time-frequency with a left oblique line.
  • the resource block represents the first time-frequency resource block FP N1+1 .
  • the second time-frequency resource block used by the cell is FP 2 .
  • a method for determining a time-frequency resource by using an SINR for an information decision value includes:
  • Step 401 The base station determines a first time-frequency resource block, a second time-frequency resource block, and a third time-frequency resource block that the cell can use.
  • the base station determines, according to the configured time-frequency reuse factor value N 2 and the size of the first time-frequency resource FP N1+1 with the multiplexing factor value of 1, the location of the first time-frequency resource block FP N1+1 ; Determining, according to the cell number Cell_ID, the first location parameter i and the second location parameter j, further determining a size and location of the second time-frequency resource available to the cell, and determining a size of the third time-frequency resource block FPij And location.
  • the base station determines the first time frequency according to the configured size of the FP N1+1 , the set parameter table [FP l FP 2 , FP N1 , FP N1+1 ], and the set parameter table [FP U , FP i2 , FP iN2 ]. a location of the resource block FP N1+1 ; and determining a first location parameter i and a second location parameter j according to the cell number Cell_ID, further determining a size and location of the second time-frequency resource available to the cell, and The size and position of the third time-frequency resource block FPij is determined.
  • Step 402 The terminal measures its SINR value and reports it to the base station.
  • step 402 is performed; if it is in the uplink communication system, step 402 is not performed, but the SINR value of the terminal can be directly measured by the base station.
  • Step 403 The base station determines the type of the terminal according to the first terminal width A1 and the second judgment threshold A2.
  • the base station compares the SINR value with the values of Al and A2, and determines the type of the terminal according to the comparison result. Specifically, when the SINR value is less than A2, determining that the terminal is the second outer ring terminal;
  • the terminal is the first outer ring terminal; when the SINR value is not less than A1, it is determined that the terminal is an inner ring terminal.
  • Step 404 The base station allocates a time-frequency resource block to the terminal according to the terminal type.
  • the base station preferentially allocates the determined third time-frequency resource block to the second outer ring terminal.
  • the base station preferentially allocates, to the first outer ring terminal, the time-frequency resource of the second time-frequency resource block to which the determined third time-frequency resource block belongs, and removes the determined third time-frequency resource block.
  • Block if the time-frequency resource block allocated to the first outer ring terminal cannot satisfy the requirement of the first outer ring terminal in the cell, allocate the determined idle time in the third time-frequency resource block to the first outer ring terminal in the cell Time-frequency resources.
  • the base station preferentially allocates the first time-frequency resource block to the inner ring terminal, and if the first time-frequency resource block cannot meet the requirement of the inner ring terminal in the cell, allocates the entire inner ring terminal in the cell. Other idle time-frequency resources in the time-frequency resource.
  • the time-frequency resource of the time-frequency resource is double-divided.
  • the present invention can also perform triple-folding on the time-frequency resource that is double-divided. Dividing, and according to this idea, performing N+1 re-division on time-frequency resource blocks that are re-divided by N (N is an integer greater than 2).
  • the traditional FFR is not classified into the outer ring terminal.
  • the outer ring terminal is divided into two categories after each time-frequency resource block that is divided into two types: the first type of outer ring terminal and the second type. Outer loop terminal. Based on the similarity principle, after N-folding the time-frequency resource blocks, the outer ring terminals are classified into N categories: the first type of outer ring terminals and the second type of outer ring terminals of the Nth class. Ring terminal.
  • the N+1 class terminal is shared, and N judgment thresholds are required: the first judgment threshold value Al, the second judgment width Value A2
  • the Nth judges the threshold AN, and each judgment threshold can be pre-configured.
  • the first judgment threshold to the Nth judgment threshold refer to the method of dividing the terminal into the inner loop terminal and the first category according to the first judgment threshold and the second judgment threshold. The method of the ring terminal and the second type of outer ring terminal will not be described here.
  • the principle of assigning the divided time-frequency resource blocks to the N-type outer ring terminals is:
  • the inner loop terminal is still allocated a resource block with a time-frequency reuse factor of 1.
  • the time-frequency resource block is FP 222 .
  • the way to divide the terminal includes:
  • the terminal is divided into an inner loop terminal, a first type outer loop terminal, a second type outer loop terminal and a third type outer loop terminal.
  • the terminal is a third outer ring terminal
  • the terminal is not less than A3 and less than A2, determining that the terminal is the second outer ring terminal; When the CI is not less than A2 and smaller than A1, it is determined that the terminal is the first outer ring terminal; when the CI is not less than A1, it is determined that the terminal is an inner ring terminal.
  • Allocating time-frequency resource blocks for terminals of a cell whose Cell_ID is 1 includes:
  • the first time-frequency resource block FP N1+1 is allocated to the inner ring terminal.
  • an apparatus for allocating time-frequency resources includes: a splitting module 501, a splitting module 502, and an allocating module 503.
  • a weight division module 501 is configured to divide the entire time-frequency resource into multiple time-frequency resource blocks according to a weighted time-frequency reuse factor value.
  • the one-way partitioning module 501 divides the first time-frequency resource block whose time-frequency reuse factor is 1 from the entire time-frequency resource, and divides the remaining time-frequency resources into two second time-frequency resource blocks, where one equals one weight Time-frequency reuse factor value.
  • the dual partitioning module 502 is configured to perform dual partitioning on multiple time-frequency resource blocks according to the dual time-frequency multiplexing factor value N 2 .
  • the dual partitioning module 502 divides each second time-frequency resource block into N 2 third time-frequency resource blocks, where N 2 is equal to the double-time time-frequency multiplexing factor value.
  • Dividing each second time-frequency resource block into N 2 third time-frequency resource blocks includes:
  • the allocating module 503 is configured to allocate, by the terminal, a redistribution module 501 according to the terminal type. And the time-frequency resource block divided by the double partitioning module 502.
  • the device further includes: a terminal classification module 504.
  • the terminal classification module 504 is configured to obtain the channel information decision value CI of the terminal, compare the decision value CI with the first judgment threshold A1 and the second judgment threshold A2, and determine the terminal type in the small area according to the comparison result.
  • the decision value CI is not less than the second judgment threshold A2 and less than the first judgment threshold A1, it is determined that the terminal is the first outer loop terminal;
  • the apparatus can also include: a determination module 505.
  • the determining module 505 is configured to determine, after the time division of the time-frequency resource, the third time-frequency resource block used by the cell corresponding to the cell number, according to the cell number, before the time-frequency resource block is allocated to the terminal.
  • the determining module 505 determines the first location parameter and the second location parameter according to the cell number, determines a second time-frequency resource block according to the first location parameter, and determines, according to the second location parameter, the second time-frequency resource block. Three time-frequency resource blocks.
  • the allocating module 503 is further configured to: allocate the determined third time-frequency resource block to the second outer ring terminal in the cell;
  • the first time-frequency resource block is allocated to the inner ring terminal in the cell.
  • the allocating module 503 allocates the idle time-frequency resource in the entire time-frequency resource for the inner-loop terminal in the cell;
  • the time-frequency resource block of the ring terminal cannot meet the requirements of the inner ring terminal in the cell.
  • the allocation module 503 allocates the idle time-frequency resources in the determined third time-frequency resource block to the inner ring terminal in the cell.
  • the device further includes: a threshold adjustment module 506.
  • the threshold adjustment module 506 is configured to adjust the first judgment threshold A1 and the second judgment threshold A2 according to the cell load.
  • the terminal classification module 504 is further configured to divide the inner ring terminal into the first type inner ring terminal and the second type inner ring terminal according to the location of the inner ring terminal. Specifically, according to the positive and negative angles between the inner loop terminal and the main antenna direction of the cell antenna, the inner loop terminal having a negative angle with the main lobe direction of the cell line is divided into the second type inner loop terminal.
  • the double division module 502 is further configured to divide the first time-frequency resource block with the time-frequency reuse factor of 1 into a plurality of fourth time-frequency resource blocks.
  • the allocating module 503 is further configured to allocate a fourth time-frequency resource block to the inner ring terminal according to the location of the inner ring terminal.
  • the allocating module 503 may set a priority for the first type of inner ring terminal and the second type of inner ring terminal, and allocate the fourth time frequency resource to the first type of inner ring terminal and the second type of inner ring terminal according to the priority order. Piece.
  • the allocating module 503 configures the first type of inner ring terminal to allocate the fourth time-frequency resource block in the order of the order, and configures the second type of inner ring terminal to allocate the fourth time-frequency resource block in reverse order. This method can further suppress interference under non-full load conditions.
  • the device further includes:
  • the N-repartition module 507 is configured to perform N-folding on each time-frequency resource block that is re-divided by N-1 according to the N-time time-frequency reuse factor value N n .
  • the allocating module 503 is configured to allocate, according to the terminal type, the time-frequency resource block after the N re-division.
  • the cell in the foregoing content generally refers to a cell where the terminal is located.
  • the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware.
  • the invention can be embodied in the form of one or more computer program products embodied on a computer-usable storage medium (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本发明实施例公开了一种时频资源处理方法和装置,均可根据一重时频复用因子值将整个时频资源划分成多个时频资源块;根据二重时频复用因子值对所述多个时频资源块进行二重划分;根据终端类型,为终端分配二重划分后的时频资源块。本发明方法和装置,能够对传统的FFR进行改进,在保证时频资源利用率相同的情况下,能够进一步抑止小区间的干扰;特别是能够提高位于小区边缘的终端的性能。

Description

一种时频资源处理方法和装置 技术领域
本发明涉及无线通信技术领域, 特别涉及一种时频资源处理方法和装 置。 背景技术
在釆用基站进行调度控制的数据传输系统中, 系统所有资源的调度分 配通常由基站进行, 例如, 基站进行下行传输时的资源分配情况以及终端 进行上行传输时所能使用的资源情况等, 这些都由基站调度分配。
在正交频分复用 ( Orthogonal Frequency Division Multiplexing, OFDM ) 系统中, 同一小区内, 基站与不同终端进行下行数据传输时, 由于这些下 行链路是彼此正交的, 因此可以避免小区内干扰。 然而, 不同小区之间的 下行链路可能不是正交的, 因此每一个终端都可能受到来自其它相邻小区 的基站的下行干扰, 即小区间干扰。
如果小区间干扰严重, 则会降低系统容量, 特别是小区边缘终端的传 输能力, 进而影响系统的覆盖能力以及终端的性能。 为了克服小区间干扰 并保证一定的带宽利用率, 可以釆用 FFR ( Fractional Frequency Reuse , 部 分频率复用)技术, 将不同的子带资源分配给边缘终端, 以降低小区间干 扰强度。
传统 FFR的主要原理为: 首先, 将可用时频资源划分为 Ν ( Ν为大于 零的整数)个 FP ( Frequency Partition, 频率分区), 假设 N=4, 即: 将可用 时频资源划分为 [FFP2,^3,^4 ]。 其中, FP2,FP3,FP4的时频复用因子值为 3
(即 Reusel/3 , 也称作 Reuse3 ), FP"FP3FP4中的一个时频资源块分配给三 个相邻小区中的一个小区, 而其它两个小区不能使用该时频资源, 或者需 要釆用限制该时频资源的子载波发射功率的方法来使用该时频资源; ^时 频复用因子值为 1 (即 Reuse 1 ) , 上述的该三个相邻小区都可以使用该时频 资源。 然后, 将终端用户分为两类, 即内环终端 (距离基站较近或者信噪 比较高的终端)和外环终端(距离基站较远或者信噪比较低的终端), 为内 环终端分配 Reuse 1的时频资源块 FP1或者所有的时频资源块,而外环终端 则只可以分配 F , 3, FPA中的一个。
目前存在的算法中, FP分为时频复用因子为 1和时频复用因子为 N-1 的两部分, N的取值一般为 4和 8。 当 N=4时, 可以保证相邻的三个小区 边缘用户分配的时频资源块正交; 当 N=8时, 可以保证相邻的七个小区的 处于小区边缘的终端分配的时频资源块正交。 也就是说, N 的取值越大, 小区间的干扰就越小, 反之, N 的取值越小, 小区间的干扰就越大。 然而 随着 N值的增加, 由于外环终端只使用 1/N的时频资源, 则可以利用的时 频资源也越少。
综上所述, 时频资源利用率是由 N值决定的, 为了抑制小区间的干扰, 是以牺牲时频资源利用率为代价的, 这将显著降低位于小区边缘的终端的 性能, 进而降低用户满意度。 发明内容
本发明的主要目的在于提供一种时频资源处理方法和装置, 在保证时 频资源利用率相同的情况下, 能够进一步抑止小区间的干扰, 特别是能够 提高位于小区边缘的终端的性能。
为了达到上述目的, 本发明的技术方案是这样实现的:
一种时频资源处理方法, 该方法包括:
才艮据一重时频复用因子值将整个时频资源划分成多个时频资源块; 根据二重时频复用因子值对所述多个时频资源块进行二重划分; 才艮据终端类型, 为终端分配二重划分后的时频资源块。
所述根据一重时频复用因子值将整个时频资源划分成多个时频资源 块, 包括:
从整个时频资源中划分出时频复用因子是 1 的第一时频资源块, 将剩 下的时频资源划分成 Ni个第二时频资源块; 所述 Ni等于一重时频复用因 子值;
所述根据二重时频复用因子将多个时频资源块进行二重划分, 包括: 将每个第二时频资源块划分成 N2个第三时频资源块; 所述 N2等于二 重时频复用因子值。
所述将每个第二时频资源块划分成 N2个第三时频资源块, 包括: 将每个第二时频资源块在频域上划分成 N2个第三时频资源块; 或, 将每个第二时频资源块在时域上划分成 N2个第三时频资源块; 或, 将每个第二时频资源块在时域上和频域上共同划分成 N2个第三时频资 源块。
所述终端类型是才艮据下列步骤确定的:
获取终端的信道信息判决值;
将所述信道信息判决值分别与预设的第一判断阔值和第二判断阔值进 行比较, 根据比较结果确定终端类型。
所述第二判断阔值小于第一判断阔值;
所述根据比较结果确定终端类型包括:
当所述信道信息判决值小于第二判断阔值时, 确定终端为第二外环终 端;
当所述信道信息判决值不小于第二判断阔值、 且小于第一判断阔值时, 确定终端为第一外环终端; 当所述信道信息判决值不小于第一判断阔值时, 确定终端为内环终端。 所述为终端分配二重划分后的时频资源块包括:
为第二外环终端分配确定的第三时频资源块;
为第一外环终端分配确定的第三时频资源块所属的第二时频资源块中 除第三时频资源块之外的时频资源块;
为内环终端分配第一时频资源块。
该方法还包括:
根据终端所处小区的负载调整所述第一判断阔值和所述第二判断阔 值。
进行所述二重划分之后, 为终端分配二重划分后的时频资源块之前, 该方法还包括:
确定终端所处小区所使用的第三时频资源块;
所述确定第三时频资源块的过程包括:
根据小区编号, 确定第一位置参数和第二位置参数;
根据所述第一位置参数确定第二时频资源块;
根据所述第二位置参数, 确定第二时频资源块中的第三时频资源块。 该方法还包括:
在所述第一时频资源块不能满足内环终端的需求时, 为内环终端分配 整个时频资源中空闲的时频资源;
在分配给第一外环终端的时频资源块不能满足内环终端的需求时, 为 内环终端分配确定的第三时频资源块中空闲的时频资源。
该方法还包括:
将所述第一时频资源块分成多个第四时频资源块;
才艮据内环终端的位置, 为内环终端分配第四时频资源块。
该方法还包括: 根据 N重时频复用因子, 将经过 N-1重划分后的每个时频资源块进行
N重划分, 其中 N为大于 2的整数;
才艮据所有判断阔值, 将终端划分成内环终端和 N类外环终端; 为内环终端和 N类外环终端分配经过 N重划分的时频资源块。
一种时频资源处理装置, 该装置包括:
一重划分模块, 用于根据一重时频复用因子值将整个时频资源划分成 多个时频资源块;
二重划分模块, 用于根据二重时频复用因子值对所述多个时频资源块 进行二重划分;
分配模块, 用于 4艮据终端类型, 为终端分配二重划分后的时频资源块。 所述一重划分模块在根据一重时频复用因子值将整个时频资源划分成 多个时频资源块时, 用于:
从整个时频资源中划分出时频复用因子是 1 的第一时频资源块, 将剩 下的时频资源划分成 个第二时频资源块; 所述 等于一重时频复用因 子值;
所述二重划分模块在根据二重时频复用因子值对所述多个时频资源块 进行二重划分时, 用于:
将每个第二时频资源块划分成 N2个第三时频资源块; 所述 N2等于二 重时频复用因子值。
所述二重划分模块在将每个第二时频资源块划分成 N2个第三时频资源 块时, 用于:
将每个第二时频资源块在频域上划分成 N2个第三时频资源块; 或, 将每个第二时频资源块在时域上划分成 N2个第三时频资源块; 或, 将每个第二时频资源块在时域上和频域上共同划分成 N2个第三时频资 源块。 该装置还包括:
确定模块, 用于在二重划分模块进行二重划分之后, 分配模块为终端 分配二重划分后的时频资源块之前, 确定终端所处小区所使用的第三时频 资源块;
所述确定模块具体用于:
根据小区编号, 确定第一位置参数和第二位置参数; 根据第一位置参 数确定第二时频资源块; 根据第二位置参数, 确定第二时频资源块中的第 三时频资源块。
该装置还包括:
终端分类模块, 用于获取终端的信道信息判决值, 将所述信道信息判 决值分别与预设的第一判断阔值和第二判断阔值进行比较, 根据比较结果 确定终端类型。
可见, 本发明对传统 FFR中的时频资源进行二重划分, 根据终端类型 分配经过二重划分后的时频资源块; 在保证时频资源利用率相同的基础上, 进一步抑制小区间的干扰。 附图说明
图 1A为本发明实施例分配时频资源的方法示意图;
图 1B为本发明实施例 Ni=3 , N2=7时, 在频域上二重划分时频资源的 示意图;
图 1C为本发明实施例 Ni=3 , N2=7时, 在时域上二重划分时频资源的 示意图;
图 2为本发明实施例划分终端类型的方法示意图;
图 3A为本发明实施例N1=3时的资源映射示意图;
图 3B为本发明实施例 N2=7时, FP2划分后的资源映射示意图; 图 4为本发明实施例信息判决值釆用 SINR ( Signal to Interference plus Noise Ratio, 信号与干 ·ί尤噪声比)分配时频资源的方法示意图; 图 5为本发明实施例分配时频资源的装置示意图。 具体实施方式
本发明实施例在传统 FFR基础上, 对时频资源块进行进一步划分, 并 对用户终端重新分类, 配合合理的资源分配方式, 在保证相同的时频资源 利用率的前提下能够进一步降低 d、区间干扰, 提高系统的总容量以及位于 小区边缘的终端的性能。
本发明适用于上行通信系统和下行通信系统。
下面结合说明书附图对本发明实施例的方案作详细介绍。
参见图 1A, 本发明实施例分配时频资源的方法, 包括:
步骤 101、 根据一重时频复用因子值 ( Ν为大于零的整数)将整个 时频资源划分成多个时频资源块。
步骤 102、 根据二重时频复用因子值 N2 ( N2为大于零的整数)对多个 时频资源块进行二重划分。
步骤 103、 根据终端类型, 为终端分配二重划分后的时频资源块。
步骤 101 中, 从整个时频资源中划分出时频复用因子是 1的第一时频 资源块, 将剩下的时频资源划分成 个第二时频资源块; 其中 等于一 重时频复用因子值, 第二时频资源块的时频复用因子值是 Ni。 也就是说, 本步骤将整个时频资源划分为 Ni+1个 FP。 其中, 用 FPN1+1表示时频复用 因子是 1的第一时频资源块, 用 表示第 i个第二时频资源块; i为第一 位置参数, i的取值范围是 1到 Ni。
在极限情况下, 第一时频资源块大小是 0, 即不划分出时频复用因子是 1的第一时频资源块。
步骤 102中, 将每个第二时频资源块划分成 N2个第三时频资源块。 其 中, N2等于二重时频复用因子值,第三时频资源块的时频复用因子值是 N2。 具体的, 将第 i个第二时频资源块 FPi划分成 N2个第三时频资源块。 其中, 用 FPij表示第 i个第二时频资源块中第 j个第三时频资源块, j为第 二位置参数。 i的取值范围是 1到 Nl j的取值范围是 1到 N2
当 N2=l时, 即为传统的 FFR划分方法。
其中, 将每个第二时频资源块划分成 N2个第三时频资源块包括: 将每个第二时频资源块在频域上划分成 N2个第三时频资源块 (具体参 见图 1B , 图中以 Ni=3 , N2=7为例); 或,
将每个第二时频资源块在时域上划分成 N2个第三时频资源块 (具体参 见图 1C , 图中以 Ni=3 , N2=7为例); 或,
将每个第二时频资源块在时域以及频域上划分成 N2个第三时频资源 块。
步骤 102和步骤 103之间还包括:
根据小区编号(Cell— ID ), 确定小区编号对应的小区所使用的第三时频 资源块。 具体包括:
根据小区编号, 确定第一位置参数 i和第二位置参数 j;
根据第一位置参数 i, 确定小区所使用的第二时频资源块
根据第二位置参数 j , 确定第二时频资源块 中的第三时频资源块 由于 i和 j的值是确定的, 因此 和 FPij都是确定的值, 而不是不确 定的范围值。
确定 i和 j的方法包括但不限于下述方法:
i=mod ( Cell— ID , Ni ) +1 ; j=mod ( Cell— ID , N2 ) +1。
步骤 103 中, 终端类型分为三类: 内环终端、 第一外环终端和第二外 环终端。 具体划分终端类型的方法在图 2中介绍。
为终端分配二重划分后的时频资源块包括: 为小区中的第二外环终端分配已确定的第三时频资源块 FPij;
为小区中的第一外环终端分配已确定的第三时频资源块 FPij所属的第 二时频资源 块中除第三时频资源块 FPij之外的时频资源块;
为小区中的内环终端分配第一时频资源块 FPN1+1
为了使资源合理利用, 在第一时频资源块不能满足小区中的内环终端 的需求时, 还可以为小区中的内环终端分配整个时频资源中空闲的时频资 源块; 在分配给第一外环终端的时频资源块不能满足小区中的第一外环终 端的需求时, 为小区中的第一外环终端分配已确定的第三时频资源块中空 闲的时频资源。
通过釆用上述分配资源的方法, 在保证相同的时频资源利用率的前提 下能够进一步降低小区间干扰, 由于给第二外环终端分配特定的时频资源 块, 因此能够提高小区第二外环终端的性能, 提高系统总容量。
进一步地, 本发明实施例还包括:
根据内环终端的位置将内环终端划分为第一类内环终端和第二类内环 终端。 具体的, 根据内环终端与小区天线主瓣方向的夹角正负, 将与小区 主瓣方向的夹角为负的内环终端划分成第二类内环终端。
将时频复用因子值是 1的第一时频资源块划分为若干第四时频资源块。 才艮据内环终端的位置, 为内环终端分配第四时频资源块。
具体的, 可以为第一类内环终端和第二类内环终端设定优先级, 按照 优先级顺序为第一类内环终端和第二类内环终端分配第四时频资源块。 或 者按照顺序次序为第一类内环终端分配第四时频资源块, 按照逆序次序为 第二类内环终端分配第四时频资源块, 此方式在非满载的情况下能进一步 抑制干扰。
参见图 2, 本发明实施例划分终端类型的方法, 包括: 步骤 201、 获取终端的信道信息判决值 CI。
其中, CI可以是表征用户到达基站的距离参数 D, D的大小与距离成 反比; CI也可以是表征终端用户收发信号质量的参数 S, S可以是以下几种 中的至少一种:
RSSI ( Received Signal Strength Indication, 接收信号强度指示信息);
SINR;
SIR ( Signal to Interference Ratio, 信号与干扰比 );
可以预先指定釆用 D或 S作为 CI。
步骤 202、将判决值 CI分别与第一判断阔值 A1和第二判断阔值 A2进 行比较, 根据比较结果确定小区内的终端类型。
其中, 第一判断阔值 A1和第二判断阔值 A2可以预先确定, 步骤 201 中获取的 CI的类型必须与 A1和 A2相对应。 一般来说, D对应的 A1和 A2的值与 S对应的 A1和 A2的值是不相同的。
根据比较结果确定小区内的终端类型包括:
当 CI小于 A2时, 确定终端为第二外环终端;
当 CI不小于 A2且小于 A1时, 确定终端为第一外环终端;
当 CI不小于 A1时, 确定终端为内环终端。
本发明实施例中, 参数 N2、 Al、 A1和 FPN1+1中的一项或多项可 以由协议规定并配置到基站中; 也可以由基站确定; 还可以由基站的上层 网元确定后通知基站。 所述上层网元可以是: 中继设备、 基站控制器、 接 入服务网、 连接服务网和核心网网关等; 并且在确定 A1和 A2后, 指定 CI 是 D或 S。
进一步的, 由于接入终端的位置存在随机性, 并且还会随着时间进行 移动, 因此终端的信道条件也在不断变化; 因此随着时间的变化, 小区内 的内环终端、 第一外环终端以及第二外环终端的个数是在不断改变的。 为 了合理分配时频资源, A1和 A2的值还可以进行调整, 比如基站根据小区 负载调整 A1和 A2的值。
调整阔值的触发条件包括但不限于以下方式:
方式一、 由计时器计时, 到达一定的时间周期 T。 所述调整阔值可以 由协议规定也可以由基站配置。
方式二、 由上层单元通知基站进行调整。
A1和 Α2的调整准则可以满足以下任意一种或多种:
一、 与上一个时间周期相比, 若系统吞吐量明显下降, 并且降低到某 个阔值时, 则基站统计第一外环终端个数相对终端用户个数的比值, 若该 比值明显增加, 则可降低 A1的大小。
二、 当上层单元监控到相邻的 ( Mj的值等于一重时频复用因子 的值)个小区 IOT ( Interference over Thermal, 干扰噪声比) 明显增加时, 则增加 A1值的大小; 反之减小 A1的值。
三、 当上层单位监控到相邻的 M ( Mi<M<M2, 其中, M2的值等于二 重时频复用因子 N2的值)个小区的 IOT明显增加时, 则增加 A2值; 反之 减小 A2值。
在 A1和 A2调整后,按照最新的 A1和 A2判定接入小区的终端的类型。 参见图 3A, 以 Ni=3为例的资源映射示意图, 其中, 带左斜线的时频 资源块表示不同的 i值所对应的第二时频资源块 FPi, 带左斜线的的时频资 源块表示第一时频资源块 FPN1+1
若以 i=mod ( Cell— ID , Ni ) +1为例, 计算 Cell— ID是 1的小区所使用 的第二时频资源块 FPi,则可得到 i=2, 即 Cell— ID是 1的小区所使用的第二 时频资源块是 FP2
应用上述所得到的 FP2、 N2=7为例, 得到的时频资源映射图如图 3B所 示; 其中, 带横线的资源块表示不同的 j值所对应的第三时频资源块 FP¾。 若以 j=mod ( Cell— ID , N2 ) +1为例, 计算 Cell— ID是 1的小区所使用 的第三时频资源块 FPij, 则可得到 j=2 , 因此 Cell— ID是 1的小区所使用的 第三时频资源块是 FP22
下面以具体的实施例, 说明本发明实施例为终端分配时频资源的方法。 参见图 4, 本发明实施例信息判决值釆用 SINR分配时频资源的方法, 包括:
步骤 401、基站确定小区可以使用的第一时频资源块、 第二时频资源块 和第三时频资源块。
具体的, 基站根据配置的时频复用因子值 N2和复用因子值为 1的 第一时频资源 FPN1+1的大小, 确定第一时频资源块 FPN1+1的位置; 以及根 据小区编号 Cell— ID, 确定第一位置参数 i和第二位置参数 j , 进一步确定可 供所述小区使用的第二时频资源 的大小和位置,以及确定第三时频资源 块 FPij的大小和位置。
或者,基站根据配置的 FPN1+1的大小、集合参数表 [FPl FP2, FPN1 , FPN1+1]以及集合参数表 [FPU , FPi2, FPiN2] , 确定第一时频资源块 FPN1+1 的位置; 以及根据小区编号 Cell— ID , 确定第一位置参数 i和第二位置参数 j , 进一步确定可供所述小区使用的第二时频资源 的大小和位置, 以及 确定第三时频资源块 FPij的大小和位置。
步骤 402、 终端测量自身的 SINR值, 上报给基站。
需要说明的是, 如果是在下行通信系统中, 则执行步骤 402; 如果是在 上行通信系统中 ,则不执行步骤 402 ,而是可以由基站直接测量终端的 SINR 值。
步骤 403、 基站根据第一判端阔值 A1和第二判断阔值 A2判断终端的 类型。
基站将 SINR值与 Al、 A2值进行比较,根据比较结果确定终端的类型。 具体的, 在 SINR值小于 A2时, 确定终端为第二外环终端;
在 SINR值不小于 A2且小于 A1时, 确定终端为第一外环终端; 在 SINR值不小于 A1时, 确定终端为内环终端。
步骤 404、 基站根据终端类型, 为终端分配时频资源块。
该步骤中, 如果终端是第二外环终端, 基站优先为第二外环终端分配 已确定的第三时频资源块。
如果终端是第一外环终端, 基站优先为第一外环终端分配已确定的第 三时频资源块所属的第二时频资源块中除去已确定的第三时频资源块的时 频资源块, 如果分配给第一外环终端的时频资源块不能满足小区中的第一 外环终端的需求时, 为小区中的第一外环终端分配已确定的第三时频资源 块中空闲的时频资源。
如果终端是内环终端, 基站优先为内环终端分配第一时频资源块, 如 果第一时频资源块不能满足小区中的内环终端的需求时, 则为小区中的内 环终端分配整个时频资源中其它的空闲时频资源。
传统 FFR对时频资源进行一重划分, 本发明实施例对经过一重划分的 每个时频资源块进行二重划分, 基于相似的原理, 本发明还可以对经过二 重划分的时频资源进行三重划分, 以及按照此思路, 对 N ( N为大于 2的 整数)重划分后的时频资源块进行 N+1重划分。 其中, 第 N重划分的时频 复用因子是 Nn( n为大于 0的整数 ) , Nn的值可以预先配置。比如配置 N3=7, 表示进行第三重划分时将每个经过二重划分的时频资源 FPij分成 7个时频 资源块。
相应地, 传统 FFR对外环终端不分类, 本发明实施例对经过一重划分 的每个时频资源块进行二重划分后, 将外环终端分为两类: 第一类外环终 端和第二类外环终端。基于相似的原理, 在对时频资源块进行 N重划分后, 将外环终端分为 N类: 第一类外环终端、 第二类外环终端 第 N类外 环终端。
具体地, 如果需要将外环终端划分成 N类、 且将内环终端作为一类, 则共有 N+1类终端, 需配置 N个判断阔值: 第一判断阔值 Al、 第二判断 阔值 A2 第 N判断阔值 AN, 每个判断阔值可以预先配置。 根据所有 判断阔值(第一判断阔值至第 N判断阔值) 划分终端类型的方法具体可参 见根据第一判断阔值和第二判断阔值将终端划分成内环终端、 第一类外环 终端和第二类外环终端的方法, 在此不再赘述。
当时频资源经过 N重划分, 外环终端划分成 N类后, 将划分后的时频 资源块分配给 N类外环终端的原则是:
给第 N类外环终端分配第 N重划分的时频资源块;
给第 N-1类外环终端分配属于第 N-1重划分的时频资源块、 但不属于 第 N重划分的时频资源块;
给内环终端仍然分配时频复用因子为 1的资源块。
下面以一个具体的例子详细说明:
比如: 需要将经过二重划分后的时频资源块 FPij再进行三重划分,得到 划分后的第五时频资源块 FP ,三重时频复用因子 N3=7, 小区编号 Cell— ID 疋 1;
前面实施例求得 i=2, j=2, 以 k=mod ( Cell— ID, N2 ) +l为例, 计算得 k=2, 因此, Cell— ID是 1 , 可以使用的第三重时频资源块是 FP222
划分终端的方式包括:
根据第一判断阔值 Al、 第二判断阔值 A2和第三判断阔值 A3将终端 分成内环终端、 第一类外环终端、 第二类外环终端和第三类外环终端。
具体的:
当 CI小于 A3时, 确定终端为第三外环终端;
当 CI不小于 A3且小于 A2时, 确定终端为第二外环终端; 当 CI不小于 A2且小于 A1时, 确定终端为第一外环终端; 当 CI不小于 A1时, 确定终端为内环终端。
为 Cell— ID是 1的小区的终端分配时频资源块包括:
将 FP222分配给第三外环终端;
将 FP22中除去 FP222的时频资源块分配给第二外环终端;
将 FP2中除去 FP22的时频资源块分配给第一外环终端;
将第一时频资源块 FPN1+1分配给内环终端。 供一种分配时频资源的装置, 由于装置的实施与方法的实施相似, 重复之 处, 不再赘述。
参见图 5 , 本发明实施例分配时频资源的装置, 包括: 一重划分模块 501、 二重划分模块 502和分配模块 503。
一重划分模块 501 , 用于根据一重时频复用因子值 ^将整个时频资源 划分成多个时频资源块。
具体的,一重划分模块 501从整个时频资源中划分出时频复用因子是 1 的第一时频资源块, 将剩下的时频资源划分成 个第二时频资源块, 其中 等于一重时频复用因子值。
二重划分模块 502 , 用于根据二重时频复用因子值 N2对多个时频资源 块进行二重划分。
具体的, 二重划分模块 502将每个第二时频资源块划分成 N2个第三时 频资源块, 其中 N2等于二重时频复用因子值。
将每个第二时频资源块划分成 N2个第三时频资源块包括:
将每个第二时频资源块在频域上划分成 N2个第三时频资源块; 或 将每个第二时频资源块在时域上划分成 N2个第三时频资源块。
分配模块 503 , 用于根据终端类型, 为终端分配经过一重划分模块 501 和二重划分模块 502划分后的时频资源块。
进一步地, 所述装置还包括: 终端分类模块 504。
终端分类模块 504, 用于获取终端的信道信息判决值 CI; 将判决值 CI 分别与第一判断阔值 A1和第二判断阔值 A2进行比较, 根据比较结果确定 小区内的终端类型。
具体的, 当判决值 CI小于第二判断阔值 A2时, 确定终端为第二外环 终端;
当判决值 CI不小于第二判断阔值 A2、 且小于第一判断阔值 A1时, 确 定终端为第一外环终端;
当判决值 CI不小于第一判断阔值 A1时, 确定终端为内环终端。
所述装置还可以包括: 确定模块 505。
确定模块 505, 用于在对时频资源进行二重划分之后, 为终端分配时频 资源块之前, 根据小区编号, 确定小区编号对应的小区使用的第三时频资 源块。
具体的, 确定模块 505根据小区编号, 确定第一位置参数和第二位置 参数; 根据第一位置参数确定第二时频资源块; 根据第二位置参数, 确定 第二时频资源块中的第三时频资源块。
分配模块 503还具体用于: 为小区中的第二外环终端分配已确定的第 三时频资源块;
为小区中的第一外环终端分配已确定的第三时频资源块所属的第二时 频资源块中除第三时频资源块之外的时频资源块;
为小区中的内环终端分配第一时频资源块。
进一步地, 在第一时频资源块不能满足小区中的内环终端的需求时, 分配模块 503 为小区中的内环终端分配整个时频资源中空闲的时频资源; 在分配给第一外环终端的时频资源块不能满足小区中的内环终端的需求 时, 分配模块 503 为小区中的内环终端分配已确定的第三时频资源块中空 闲的时频资源。
为了合理分配资源, 所述装置还包括: 阔值调整模块 506。
阔值调整模块 506, 用于根据小区负载调整第一判断阔值 A1和第二判 断阔值 A2。
较佳的, 为了进一步抑制内环终端的小区干扰, 终端分类模块 504还 用于根据内环终端的位置将内环终端划分成第一类内环终端和第二类内环 终端。 具体的, 根据内环终端与小区天线主瓣方向的夹角正负, 将与小区 线主瓣方向的夹角为负的内环终端划分成第二类内环终端。
相应的, 二重划分模块 502还用于将时频复用因子是 1的第一时频资 源块划分成多个第四时频资源块。
相应的, 分配模块 503还用于根据内环终端的位置, 为内环终端分配 第四时频资源块。
具体的, 分配模块 503 可以为第一类内环终端和第二类内环终端设定 优先级, 按照优先级顺序为第一类内环终端和第二类内环终端分配第四时 频资源块。 或者, 分配模块 503 配置第一类内环终端按照顺序次序分配第 四时频资源块, 配置第二类内环终端按照逆序次序分配第四时频资源块。 此方式在非满载的情况下能进一步抑制干扰。
进一步地, 该装置还包括:
N重划分模块 507, 用于才艮据 N重时频复用因子值 Nn将经过 N-1重划 分的每个时频资源块进行 N重划分。
相应地, 分配模块 503用于根据终端类型, 为终端分配经过 N重划分 后的时频资源块。
需要说明的是, 前述内容中的小区, 通常指终端所处的小区。 本领域内的技术人员应明白, 本发明的实施例可提供为方法、 系统、 或计算机程序产品。 因此, 本发明可釆用完全硬件实施例、 完全软件实施 例、 或结合软件和硬件方面的实施例的形式。 而且, 本发明可釆用在一个 或多个其中包含有计算机可用程序代码的计算机可用存储介质 (包括但不 限于磁盘存储器、 CD-ROM、 光学存储器等)上实施的计算机程序产品的 形式。
本发明是参照根据本发明实施例的方法、 设备(系统)、 和计算机程序 产品的流程图和 /或方框图来描述的。 应理解可由计算机程序指令实现流 程图和 /或方框图中的每一流程和 /或方框、 以及流程图和 /或方框图中 的流程和 /或方框的结合。 可提供这些计算机程序指令到通用计算机、 专 用计算机、 嵌入式处理机或其它可编程数据处理设备的处理器以产生一个 机器, 使得通过计算机或其它可编程数据处理设备的处理器执行的指令产 生用于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方 框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其它可编程数据处理 设备以特定方式工作的计算机可读存储器中, 使得存储在该计算机可读存 储器中的指令产生包括指令装置的制造品, 该指令装置实现在流程图一个 流程或多个流程和 /或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其它可编程数据处理设备 上, 使得在计算机或其它可编程设备上执行一系列操作步骤以产生计算机 实现的处理, 从而在计算机或其它可编程设备上执行的指令提供用于实现 在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的 功能的步骤。
尽管已描述了本发明的优选实施例, 但本领域内的技术人员一旦得知 了基本创造性概念, 则可对这些实施例作出另外的变更和修改。 所以, 所 附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和 修改。 本发明的精神和范围。 这样, 倘若本发明的这些修改和变型属于本发明权 利要求及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在 内。

Claims

权利要求书
1、 一种时频资源处理方法, 其特征在于, 该方法包括:
才艮据一重时频复用因子值将整个时频资源划分成多个时频资源块; 根据二重时频复用因子值对所述多个时频资源块进行二重划分; 才艮据终端类型, 为终端分配二重划分后的时频资源块。
2、 如权利要求 1所述的方法, 其特征在于,
所述根据一重时频复用因子值将整个时频资源划分成多个时频资源 块, 包括:
从整个时频资源中划分出时频复用因子是 1 的第一时频资源块, 将剩 下的时频资源划分成 个第二时频资源块; 所述 等于一重时频复用因 子值;
所述根据二重时频复用因子将多个时频资源块进行二重划分, 包括: 将每个第二时频资源块划分成 N2个第三时频资源块; 所述 N2等于二 重时频复用因子值。
3、 如权利要求 2所述的方法, 其特征在于, 所述将每个第二时频资源 块划分成 N2个第三时频资源块, 包括:
将每个第二时频资源块在频域上划分成 N2个第三时频资源块; 或, 将每个第二时频资源块在时域上划分成 N2个第三时频资源块; 或, 将每个第二时频资源块在时域上和频域上共同划分成 N2个第三时频资 源块。
4、 如权利要求 1所述的方法, 其特征在于, 所述终端类型是根据下列 步骤确定的:
获取终端的信道信息判决值;
将所述信道信息判决值分别与预设的第一判断阔值和第二判断阔值进 行比较, 根据比较结果确定终端类型。
5、 如权利要求 4所述的方法, 其特征在于, 所述第二判断阔值小于第 一判断阔值;
所述根据比较结果确定终端类型包括:
当所述信道信息判决值小于第二判断阔值时, 确定终端为第二外环终 端;
当所述信道信息判决值不小于第二判断阔值、 且小于第一判断阔值时, 确定终端为第一外环终端;
当所述信道信息判决值不小于第一判断阔值时, 确定终端为内环终端。
6、 如权利要求 5所述的方法, 其特征在于, 所述为终端分配二重划分 后的时频资源块包括:
为第二外环终端分配确定的第三时频资源块;
为第一外环终端分配确定的第三时频资源块所属的第二时频资源块中 除第三时频资源块之外的时频资源块;
为内环终端分配第一时频资源块。
7、 如权利要求 4至 6任一项述的方法, 其特征在于, 该方法还包括: 根据终端所处小区的负载调整所述第一判断阔值和所述第二判断阔 值。
8、 如权利要求 1至 6任一项所述的方法, 其特征在于, 进行所述二重 划分之后, 为终端分配二重划分后的时频资源块之前, 该方法还包括: 确定终端所处小区所使用的第三时频资源块;
所述确定第三时频资源块的过程包括:
根据小区编号, 确定第一位置参数和第二位置参数;
根据所述第一位置参数确定第二时频资源块;
根据所述第二位置参数, 确定第二时频资源块中的第三时频资源块。
9、如权利要求 2至 6任一项所述的方法,其特征在于,该方法还包括: 在所述第一时频资源块不能满足内环终端的需求时, 为内环终端分配 整个时频资源中空闲的时频资源;
在分配给第一外环终端的时频资源块不能满足内环终端的需求时, 为 内环终端分配确定的第三时频资源块中空闲的时频资源。
10、 如权利要求 2至 6任一项所述的方法, 其特征在于, 该方法还包 括:
将所述第一时频资源块分成多个第四时频资源块;
才艮据内环终端的位置, 为内环终端分配第四时频资源块。
11、 如权利要求 1至 6任一项所述的方法, 其特征在于, 该方法还包 括:
根据 N重时频复用因子, 将经过 N-1重划分后的每个时频资源块进行 N重划分, 其中 N为大于 2的整数;
才艮据所有判断阔值, 将终端划分成内环终端和 N类外环终端; 为内环终端和 N类外环终端分配经过 N重划分的时频资源块。
12、 一种时频资源处理装置, 其特征在于, 该装置包括:
一重划分模块, 用于根据一重时频复用因子值将整个时频资源划分成 多个时频资源块;
二重划分模块, 用于根据二重时频复用因子值对所述多个时频资源块 进行二重划分;
分配模块, 用于 4艮据终端类型, 为终端分配二重划分后的时频资源块。
13、 如权利要求 12所述的装置, 其特征在于,
所述一重划分模块在根据一重时频复用因子值将整个时频资源划分成 多个时频资源块时, 用于:
从整个时频资源中划分出时频复用因子是 1 的第一时频资源块, 将剩 下的时频资源划分成 Ni个第二时频资源块; 所述 Ni等于一重时频复用因 子值;
所述二重划分模块在根据二重时频复用因子值对所述多个时频资源块 进行二重划分时, 用于:
将每个第二时频资源块划分成 N2个第三时频资源块; 所述 N2等于二 重时频复用因子值。
14、 如权利要求 13所述的装置, 其特征在于, 所述二重划分模块在将 每个第二时频资源块划分成 N2个第三时频资源块时, 用于:
将每个第二时频资源块在频域上划分成 N2个第三时频资源块; 或, 将每个第二时频资源块在时域上划分成 N2个第三时频资源块; 或, 将每个第二时频资源块在时域上和频域上共同划分成 N2个第三时频资 源块。
15、 如权利要求 12至 14任一项所述的装置, 其特征在于, 该装置还 包括:
确定模块, 用于在二重划分模块进行二重划分之后, 分配模块为终端 分配二重划分后的时频资源块之前, 确定终端所处小区所使用的第三时频 资源块;
所述确定模块具体用于:
根据小区编号, 确定第一位置参数和第二位置参数; 根据第一位置参 数确定第二时频资源块; 根据第二位置参数, 确定第二时频资源块中的第 三时频资源块。
16、 如权利要求 12至 14任一项所述的装置, 其特征在于, 该装置还 包括:
终端分类模块, 用于获取终端的信道信息判决值, 将所述信道信息判 决值分别与预设的第一判断阔值和第二判断阔值进行比较, 根据比较结果 确定终端类型
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