WO2012089052A1 - 物理层小区id分组方法、扰码分配方法及系统 - Google Patents

物理层小区id分组方法、扰码分配方法及系统 Download PDF

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Publication number
WO2012089052A1
WO2012089052A1 PCT/CN2011/084326 CN2011084326W WO2012089052A1 WO 2012089052 A1 WO2012089052 A1 WO 2012089052A1 CN 2011084326 W CN2011084326 W CN 2011084326W WO 2012089052 A1 WO2012089052 A1 WO 2012089052A1
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Prior art keywords
physical layer
layer cell
cell
allocated
channel
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PCT/CN2011/084326
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English (en)
French (fr)
Inventor
孙浩
陈燕雷
董江波
李楠
赵培
高鹏
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中国移动通信集团设计院有限公司
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Publication of WO2012089052A1 publication Critical patent/WO2012089052A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0466Wireless resource allocation based on the type of the allocated resource the resource being a scrambling code
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J13/00Code division multiplex systems
    • H04J13/16Code allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J2211/00Orthogonal indexing scheme relating to orthogonal multiplex systems
    • H04J2211/003Orthogonal indexing scheme relating to orthogonal multiplex systems within particular systems or standards
    • H04J2211/005Long term evolution [LTE]
    • 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
    • H04W16/10Dynamic resource partitioning

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a physical layer cell ID grouping method, a scrambling code allocation method, and a system in an LTE (Long Term Evolution) system.
  • LTE Long Term Evolution
  • Scrambling code allocation is an important part of network planning and network construction of wireless communication systems.
  • Reasonable allocation and use of scrambling codes in wireless communication systems can reduce interference, improve system resource utilization, and improve overall network quality.
  • scrambling code allocation is also critical, but the industry has not yet proposed a uniform standard or method for scrambling code allocation for LTE systems, especially for scrambling code allocation in large-scale LTE networks.
  • the embodiments of the present invention provide a physical layer cell identification number ID grouping method, a scrambling code allocation method, and a system, which are used to solve the problem of unreasonable scrambling code allocation for the LTE system in the prior art.
  • An embodiment of the present invention provides a physical layer cell ID grouping method, including:
  • the embodiment of the invention further provides a scrambling code allocation method, including:
  • the scrambling code used by each channel of each cell is determined by using the physical layer cell ID assigned to each cell.
  • the embodiment of the invention further provides a physical layer cell ID grouping system, including:
  • a first scrambling code determining module configured to determine, according to each of the specified multiple channels, the physical layer cell ID number that can be allocated, and corresponding to the physical layer cell IDs used by the channel Scrambling code
  • the indicator value determining module is configured to determine a correlation index value of each of the scrambling codes used in each channel, and a dividing module, configured to divide the determined correlation index value into each preset index value interval Medium
  • a grouping module configured to allocate the physical layer cell IDs to the respective physical layer cell IDs corresponding to the two scrambling codes corresponding to each of the correlation indicator value intervals
  • the physical layer cell ID group corresponding to each preset indicator value interval is included; the lower the preset index value interval is, the higher the priority of the corresponding physical layer cell ID group is.
  • An embodiment of the present invention further provides a scrambling code distribution system, including:
  • a interference determination module configured to determine an interference condition of a cell that is not assigned a physical layer cell identification number ID
  • an allocation module configured to use a priority of a priority of a packet according to each physical layer cell, from the highest to the lowest, from each of the physical entities
  • the physical layer cell ID is selected in the layer cell ID packet, and is preferentially allocated to the cell with large interference among the cells of the unassigned physical layer cell ID;
  • the second scrambling code determining module is configured to determine a scrambling code used by each channel of each cell by using a physical layer cell ID allocated by each cell.
  • the physical layer cell ID grouping method provided by the embodiment of the present invention, first, for each channel of the specified multiple channels, the physical layer cell IDs that can be allocated are used, and the physical layer cells used by the channel are determined. IDs respectively corresponding to the scrambling codes, and determining correlation index values of each of the scrambling codes used in each channel; and then dividing the determined correlation index values into the preset index value intervals, and And assigning, according to the physical layer cell ID corresponding to the two scrambling codes corresponding to each of the correlation indicator values in each of the preset index value intervals, each physical layer cell ID to each physical medium corresponding to each preset index value interval In the layer cell ID packet, the lower the preset indicator value interval is, the higher the priority of the corresponding physical layer cell ID packet is.
  • the clustering of the physical layer cell IDs is based on all the scrambling codes that can be used by the plurality of channels that need to use the scrambling code, considering the correlation between the scrambling codes, the obtained grouping result of the physical layer cell ID, Comprehensively reflects the performance of all the scrambling codes that can be used by the multiple channels. Therefore, based on the grouping result of the physical layer cell ID, the priority of each physical layer cell ID group is from high to low.
  • the physical layer cell ID is selected in each physical layer cell ID packet, allocated to each cell, and the assigned physical layer cell ID is used to determine each The scrambling code used by each channel of the cell realizes more reasonable scrambling code allocation for the LTE system, thereby improving the communication quality when using the scrambling code for communication.
  • FIG. 1 is a flowchart of a physical layer cell ID grouping method according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a scrambling code allocation method according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a physical layer cell ID grouping method according to Embodiment 1 of the present invention.
  • FIG. 5 is a schematic structural diagram of a physical layer cell ID grouping system according to Embodiment 3 of the present invention.
  • FIG. 6 is a schematic structural diagram of a scrambling code distribution system according to Embodiment 4 of the present invention.
  • the embodiment of the present invention provides a physical layer cell ID grouping method and a scrambling code, in order to improve the rationality of the scrambling code allocation for the LTE system, and further improve the communication quality when the communication is performed using the scrambling code.
  • the preferred embodiments of the present invention are described with reference to the accompanying drawings, and the preferred embodiments of the present invention are intended to illustrate and explain the invention. And in the case of no conflict, the features in the embodiments and the embodiments of the present application can be combined with each other.
  • An embodiment of the present invention provides a physical layer cell ID grouping method, as shown in FIG. 1 , including:
  • Step S101 Determine, for each channel of the specified multiple channels, a scrambling code corresponding to each physical layer cell ID used by the channel by using each of the assignable physical layer cell IDs.
  • Step S102 Determine a correlation indicator value of each of the two scrambling codes in each scrambling code used by each channel.
  • Step S103 Divide the determined correlation index value into each preset index value interval.
  • Step S104 All physical layer cell IDs are assigned to corresponding to each preset index value interval, based on physical layer cell IDs corresponding to the two scrambling codes respectively corresponding to each correlation indicator value in each preset index value interval.
  • the physical layer cell ID group of each physical layer wherein the lower the preset index value interval, the higher the priority of the corresponding physical layer cell ID group.
  • An embodiment of the present invention further provides a scrambling code allocation method, as shown in FIG. 2, including:
  • Step S201 Determine an interference situation of a cell that does not allocate a physical layer cell identification number ID.
  • Step S202 Packets from each physical layer cell ID according to the order of priority of each physical layer cell ID group from high to low The physical layer cell ID is selected and preferentially allocated to the cell with large interference among the cells of the unassigned physical layer cell ID.
  • Step S203 Determine a scrambling code used by each channel of each cell by using a physical layer cell ID allocated by each cell.
  • FIG. 3 is a flowchart of a physical layer cell ID grouping method according to Embodiment 1 of the present invention, which specifically includes: Step S301: Specify multiple channels from multiple channels that need to use a scrambling code, and perform physical layer cell ID
  • the channel referenced by the packet may be specified according to actual needs.
  • the designated channel includes: a PBCH, a physical downlink control channel (PDCCH), and a physical format indicator channel (PCFICH).
  • the physical layer cell IDs that can be allocated are determined. According to the prior art, for the current LTE system, the total number of all physical layer cell IDs that can be allocated is 504. In the embodiment of the present invention, the 504 physical layer cells can be used. The IDs are all available as physical layer cell IDs, and some of them can be selected as the assignable physical layer cell IDs according to actual needs.
  • Step S302 After determining the multiple channels that need to use the scrambling code and the assignable physical layer cell IDs, use the physical layer cell IDs for each channel to determine the physical layer cell IDs used by the channel and the physical layer.
  • Corresponding scrambling code that is, for each channel, a corresponding scrambling code is determined for each physical layer cell ID, as follows:
  • the scrambling code is a 31-bit pseudo-random sequence generated by two mesh (m-sequence) sequences.
  • the formula is as follows:
  • c(n) (3 ⁇ 4j (n + N c ) + x 2 (n + N c )) mod 2;
  • x 2 (n + 3 Y) (x 2 (n + 3) + x 2 (n + 2) + x 2 (n + Y) + x 2 (n)) mod 2;
  • N e 1600 ;
  • ⁇ 2 («) is the value of the n-1th bit of the second m sequence, and the initial value of the 0-30 bits of the second m sequence is related to each channel. For different channels, the following may be adopted. Make a decision:
  • the scrambling code corresponding to the physical layer cell ID is determined according to the initialization parameter.
  • each bit of the binary parameter of the initialization parameter C ⁇ i is the initial value of 0-30 bits of the second m sequence.
  • the high bit is complemented by 0.
  • Step S303 after determining the scrambling codes respectively corresponding to the physical layer cell IDs used by each channel, determining each scrambling code that can be used for each channel, and then determining, for each channel, the channel usage. Correlation indicator values for each of the two scrambling codes in each scrambling code.
  • the correlation index values of the two scrambling codes are specifically determined by the following formula:
  • 3 ⁇ 4 ⁇ ; where, is the correlation index value of the scrambling code ⁇ and the scrambling code 6, N is the number of bits of the scrambling code, ⁇ is the value of the i-th bit of the scrambling code ⁇ , which is the i-th of the scrambling code 6. The value of the bit.
  • the correlation index values of the two scrambling codes can also be determined by the following formula.
  • the correlation index value determined by the formula can also be called the cyclic displacement cross-correlation index value:
  • step S304 in the embodiment of the present invention, a plurality of index value intervals are set in advance.
  • the range of the correlation index value is between [0, 1], so 0,1] is divided into multiple indicator value intervals.
  • the number of each preset indicator value interval may be determined according to actual needs. The larger the number, the more the number of subsequent physical layer cell ID packets, and the finer the packet to the physical layer cell ID, and the resulting interference. The code assignment result is more reasonable, but the amount of calculation is also larger.
  • each preset indicator value interval may be the same or different, and may be set according to actual needs. For example, for a section with a lower preset value range, the length may be determined to be small, so as to ensure the subsequent determined high. The finer the physical layer cell ID in the priority physical layer cell ID packet, the more reasonable the resulting scrambling code allocation result.
  • the determined correlation index values are divided into the preset index value intervals based on the preset index value intervals.
  • the following two specific division modes are proposed in the embodiment of the present invention:
  • the first method is: dividing each channel separately, that is, for each channel, separately dividing the correlation index value of each two scrambling codes used in the channel into each preset index value interval, and obtaining The correlation index value corresponding to the channel is divided; that is, each channel corresponds to a correlation index value division result.
  • Step S305 Grouping physical layer cell IDs.
  • each physical layer cell ID assigns, according to the physical layer cell ID corresponding to the two scrambling codes corresponding to each correlation indicator value in each preset index value interval, each physical layer cell ID to each physical medium corresponding to each preset index value interval In the layer cell ID packet, the lower the preset indicator value interval is, the higher the priority of the corresponding physical layer cell ID packet is.
  • the manner of dividing the correlation index values is different, and correspondingly, the following specific physical layer cell ID grouping manner is proposed:
  • the first mode corresponding to the manner in which the correlation index values are respectively divided for each channel, first, for each channel, based on the result of the correlation index value corresponding to the channel, each physical layer cell ID is assigned to each pre-preparation In each physical layer cell ID packet corresponding to the indicator value interval, a physical layer cell ID grouping result corresponding to the channel is obtained.
  • the physical layer cell ID finally allocated in each physical layer cell ID packet is determined, which may be as follows:
  • the "IDs present" column in the above Table 1 indicates the physical layer cell IDs present in each physical layer cell ID packet, and the priorities of the physical layer cell ID packets 1-3 are sequentially decreased;
  • the physical layer cell ID existing in only one physical layer cell ID packet is allocated to the physical layer cell ID packet; for example, ID1 and ID2 in the above Table 1 exist only in the physical layer cell ID packet 1, and ID1 is And ID2 is finally allocated to the physical layer cell ID packet 1;
  • Table 2 Channel 2 ID1, ID2, ID4 ID3, ID8 ID5, ID6, ID7 Channel 3 ID1, ID2, ID3 ID4, ID5, IDS ID6, ID7 ID ID1, ID2, ID3, ID4 ID3, ID4, ID5, ID8 ID5, ID6 , ID7, ID8 final assignment result ID1, ID2, ID3, ID4 ID5, ID6, ID7, ID8
  • the same physical layer cell ID that exists in different physical layer cell ID packets may be allocated to the physical layer cell ID group with the highest priority among the different physical layer cell ID packets, and the final allocation result is obtained. As shown in Table 3:
  • the grouping method shown in Table 2 above can better ensure the performance of the scrambling code corresponding to the physical layer cell ID in the high-priority physical layer cell ID packet.
  • the second mode is: corresponding to the foregoing manner for allocating the correlation index values for all channels, and assigning, according to the overall partitioning result of all the correlation index values, the physical layer cell IDs to the respective corresponding to each preset index value interval.
  • the final physical layer cell ID packet result is directly obtained.
  • the correlation index based on the single channel in the first mode is not used.
  • the result of the value division, or the overall division result based on all the correlation indicator values in the second method described above, can be grouped by the following schemes:
  • the ID is only determined from a preset indicator value interval; as shown in Table 4:
  • Table 4 The "ID determined” column in Table 1 above is the physical layer cell ID determined for each preset index value interval, and the interval 1-3 is sequentially increased;
  • the physical layer cell ID determined only from one preset index value interval is allocated to the physical layer cell ID packet corresponding to the preset index value interval; for example, ID1 and ID2 in the above Table 1 are only from the interval 1 If it is determined, ID1 and ID2 are finally allocated to the physical layer cell ID group 1 corresponding to the interval 1;
  • the physical layer cell IDs that are determined from the different preset indicator value intervals are allocated to the physical layer cell ID packets with the lowest priority among the different physical layer cell ID packets corresponding to the different preset index value intervals, and finally allocated.
  • Table 5 The results are shown in Table 5:
  • the physical layer cell ID that is determined from the different preset indicator value intervals may be allocated to the physical medium with the highest priority among the different physical layer cell ID groups corresponding to the different preset index value intervals.
  • the final allocation result is shown in Table 6:
  • the grouping of the assignable physical layer cell IDs is completed, and the priority of each physical layer cell ID packet is determined, and then the scrambling code allocation can be performed based on the grouping result.
  • Embodiment 2 a scheme of scrambling code allocation based on a packet of each physical layer cell ID of which priority is set will be described in detail.
  • FIG. 4 is a flowchart of a method for allocating a scrambling code according to Embodiment 2 of the present invention, which specifically includes:
  • Step S401 Selecting a device from all cells that need to perform physical layer cell ID allocation (that is, scrambling code allocation)
  • a fixed number of cells are allocated for the first physical layer cell ID.
  • the selection of the set number of cells may be randomly selected, or may be specified according to actual needs.
  • the set number of cells with large interference may be selected according to the interference condition of each cell, where The interference situation of the cell may be determined by network simulation, for example, considering the signal-to-noise ratio of the PBCH channel, the PDCCH channel, and the PCFICH channel of the cell, and is not described in detail herein.
  • intra-frequency multiplexing distance between cells that is, for every two cells in the set number of cells, if the distance between the two cells is smaller than the same between the two cells If the frequency is multiplexed, the physical layer cell IDs allocated by the two cells are different.
  • the intra-frequency multiplexing distance between the cells is related to the same-frequency/inter-frequency relationship between the two cells, and can be determined by using the prior art, and is not described in detail herein.
  • the physical layer cell IDs in the same physical layer cell group may be randomly selected, and when the physical layer cell IDs in the higher priority physical layer cell ID packets are allocated , the physical layer cell ID in the physical layer cell ID packet of the next priority is selected for allocation.
  • Step S402 Perform, according to the cell to which the physical layer cell ID is allocated, the physical layer cell ID allocation to the cell to which the physical layer cell ID is not allocated, as follows:
  • a cell in which a physical layer cell ID is not allocated is determined from all cells that need to perform physical layer cell ID allocation within a specified distance of the cell, and is determined for the unallocated
  • the cell of the physical layer cell ID selects the physical layer cell ID from each physical layer cell ID packet in the order of the priority of each physical layer cell ID packet, and allocates the cell to the determined unallocated physical layer cell ID.
  • the specified distance can be flexibly set according to actual needs and experience values.
  • the interference of the cell in which the physical layer cell ID is not allocated is determined before the allocation, and the physical layer cell ID in the physical layer cell ID packet with the highest priority is preferentially allocated to the cell with large interference.
  • the same frequency reuse distance between the cells can also be referred to. For example, based on a cell to be allocated of a cell to which the physical layer cell ID is not allocated, before the physical layer cell ID is allocated to the cell to be allocated, first determine the The intra-frequency reuse distance between each allocated cell of the physical layer cell ID is allocated, and it is determined whether the intra-frequency multiplexing distance with each allocated cell is greater than the distance from the allocated cell, If it is greater, the same physical layer cell ID as the allocated cell may be allocated. If not greater, the physical layer cell ID different from the physical layer cell ID of the allocated cell needs to be allocated.
  • Step S403 Determine whether all cells that need to perform physical layer cell ID allocation are allocated with the physical layer cell ID. If yes, go to step S404, otherwise, go to step S402.
  • Step S404 Determine, by using the physical layer cell ID allocated by each cell, respectively, using each channel of each cell.
  • the scrambling code may be specifically determined for each channel in step S302 in Embodiment 1 above, and will not be described in detail herein.
  • the scrambling codes in the LTE system are quite different from the existing wireless communication systems in terms of number, length, and usage.
  • the scrambling code of each cell in the LTE system is not unique, but is different according to the used channel.
  • the scrambling code of the PBCH channel is only related to the physical layer cell ID of the cell
  • the PDCCH is related to the physical layer cell ID of the cell and the slot number of the radio frame in which the cell is located.
  • the scrambling code allocation scheme for the non-LTE network system is uniquely allocated for the scrambling code allocated for each cell. Therefore, applying the existing scheme to the LTE system of the cartridge may cause The result of the scrambling code allocation is greatly different from the actual situation, which affects the quality of network planning and increases the difficulty for the optimization of the later network.
  • the physical layer cell ID grouping method and the scrambling code allocation method provided by the embodiment 1 of the present invention, based on the difference between the LTE system and the existing wireless communication system, first determining a plurality of channels in which the scrambling code needs to be used The scrambling code that can be used for each channel, and according to the correlation between the scrambling codes, grouping the physical layer cell IDs required for determining the scrambling code, and dividing the priority of each physical layer cell ID group, so that the priority
  • the scrambling code performance determined by the physical layer cell ID in the high physical layer cell ID packet is better, so that the priority of the packet priority of each physical layer cell ID can be based on the packet result of the physical layer cell ID.
  • the physical layer cell ID is selected, and the scrambling code is allocated to each cell, thereby realizing more reasonable scrambling code allocation for the LTE system, and improving communication quality when using the scrambling code for communication.
  • the interference size of each cell is referenced, and the actual network situation can be better and accurately reflected, so that the physical layer cell ID is allocated. More reasonable, and thus the distribution of scrambling codes is more in line with the actual network.
  • the third embodiment of the present invention further provides a physical layer cell ID grouping system, and the structure of the system is as shown in FIG. 5, which specifically includes:
  • the first scrambling code determining module 501 is configured to determine, according to each of the specified multiple channels, the each physical layer cell identification number ID that is assignable, and the interference corresponding to each physical layer cell ID used by the channel. code;
  • the indicator value determining module 502 is configured to determine a correlation indicator value of each of the scrambling codes in each scrambling code used by each channel;
  • a dividing module 503, configured to divide the determined correlation index value into each preset index value interval; the grouping module 504 is configured to use two corresponding to each of the correlation indicator values in each preset index value interval
  • the physical layer cell ID corresponding to the scrambling code is respectively assigned to each physical layer cell ID group corresponding to each preset index value interval; the lower the preset index value interval, the corresponding physical layer cell The higher the priority of the ID packet.
  • the dividing module 503 is specifically configured to divide, for each channel, a correlation index value of each of the scramble codes used by the determined channel into each preset index value interval, Obtaining a correlation index value division result corresponding to the channel;
  • the grouping module 504 is configured to allocate, according to the result of the correlation index value corresponding to the channel, each physical layer cell ID to each physical layer cell ID group corresponding to each preset index value interval. And obtaining a physical layer cell ID packet result corresponding to the channel; and determining, according to the physical layer cell ID grouping result corresponding to each channel, a physical layer cell ID finally allocated in each physical layer cell ID packet .
  • the grouping module 504 is specifically configured to determine, according to the physical layer cell ID grouping result corresponding to each channel, a physical layer cell ID existing in each physical layer cell ID group; and only one physical layer cell ID
  • the physical layer cell ID existing in the packet is allocated to the physical layer cell ID packet; and the same physical layer cell ID existing in different physical layer cell ID packets is assigned to the priority of the different physical layer cell ID packet The lowest physical layer cell ID packet, or allocated to the physical layer cell ID packet with the highest priority among the different physical layer cell ID packets.
  • the grouping module 504 is specifically configured to determine a physical layer cell ID corresponding to each of the two scrambling codes corresponding to each correlation indicator value in each preset index value interval; and only from one preset The physical layer cell ID determined in the indicator value interval is allocated to the physical layer cell ID packet corresponding to the preset indicator value interval; and the physical layer cell ID determined from the different preset index value intervals is allocated. And the physical layer cell ID group with the lowest priority in the different physical layer cell ID packets corresponding to the different preset index value intervals, or the different physical layer cell ID groups corresponding to the different preset index value intervals respectively. The highest physical layer cell ID group.
  • the fourth embodiment of the present invention further provides a scrambling code distribution system, and a schematic structural diagram thereof is shown in FIG.
  • a interference determination module 601 configured to determine an interference situation of a cell that does not allocate a physical layer cell ID
  • the allocation module 602 selects a physical layer cell ID from each physical layer cell ID packet according to the priority of each physical layer cell ID group, and preferentially allocates the interference to the cell in the unallocated physical layer cell ID.
  • the second scrambling code determining module 603 is configured to determine, by using the physical layer cell ⁇ ) allocated by each cell, a scrambling code used by each channel of each cell.
  • the allocating module 602 is specifically configured to determine, according to the determined interference situation, a cell with a large interference among cells in which the physical layer cell is not allocated; and determine the interference from the cell to which the physical layer cell ID has been allocated.
  • a cell with a smaller distance between cells is smaller than the same frequency reuse distance; and a physical layer cell ID is selected from each physical layer cell ID packet according to the order of priority of each physical layer cell ID packet from highest to lowest, and is assigned to A cell with a large interference, wherein the selected physical layer cell ID is different from the physical layer cell ID of the cell smaller than the same frequency multiplexing distance.
  • the interference determination module 601 is specifically configured to determine, in a specified distance from a cell to which the physical layer cell ID is allocated, a cell to which the physical layer cell ID is not allocated; and determine an interference condition of the cell to which the physical layer cell ID is not allocated.
  • the solution provided by the embodiment of the present invention includes: determining, for each channel of the specified multiple channels, the physical layer cell ID that can be allocated, and the physical layer cells used by the channel. ID corresponding to the interference And determining a correlation index value of each two scrambling codes in each scrambling code used by each channel; and dividing the determined correlation index value into each preset index value interval; and based on each preset index a physical layer cell ID corresponding to each of the two scrambling codes corresponding to each correlation indicator value in the value interval, and each physical layer cell ID is allocated to each physical layer cell ID group corresponding to each preset index value interval.

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Description

物理层小区 ID分组方法、 扰码分配方法及系统 本申请要求在 2010年 12月 31日提交中国专利局. 申请号为 201010618559.2、 发明名称为
"物理层小区 ID分组方法、 扰码分配方法及系统"的中国专利申请的优先权, 其全部内容通过引 用结合在本申请中。 技术领域 本发明涉及无线通信技术领域, 尤其涉及一种 LTE ( Long Term Evolution , 长期演进) 系统中的物理层小区 ID分组方法、 扰码分配方法及系统。 背景技术 扰码分配是无线通信系统的网络规划和网络建设中十分重要的环节。 在无线通信系统 中合理地分配和使用扰码, 可以减少干扰、 提高系统的资源利用率、 提高网络整体质量。 对于 LTE系统, 扰码分配同样至关重要, 但是, 目前业界对于 LTE系统的扰码分配, 特别 是在大规模 LTE网络中的扰码分配尚未提出统一的标准或方法。
现有技术中, 对于非 LTE的网络系统, 针对每个小区仅需要为其分配一个扰码, 并且 可分配给各小区的扰码的分组、 性能和优先级都是固定的。 然而在 LTE系统中, 每个小区 使用的扰码不是固定的, 并不只一个, 扰码会随着使用的信道不同而不同。 所以, 将现有 技术中针对非 LTE的网络系统的扰码分配方法, 简单应用于 LTE系统, 则可能出现由于扰 码分配的不合理, 无法获得较佳的扰码分配效果, 即使用分配后的扰码进行网络通信时, 无法得到预期的通信质量。 发明内容 本发明实施例提供一种物理层小区识别号 ID分组方法、 扰码分配方法及系统, 用以解 决现有技术中存在的无法合理的针对 LTE系统进行扰码分配的问题。
本发明实施例提供一种物理层小区 ID分组方法, 包括:
针对指定的多个信道中的每个信道, 使用可分配的各物理层小区 ID, 确定出该信道使 用的与所述各物理层小区 ID分别对应的扰码;
确定出每个信道使用的各扰码中每两个扰码的相关性指标值;
将确定出的相关性指标值划分到各预设指标值区间中;
基于所述各预设指标值区间中的每个相关性指标值所对应的两个扰码分别对应的物 理层小区 ID, 将所述各物理层小区 ID分配到分别与所述各预设指标值区间对应的各物理层 小区 ID分组中; 所述预设指标值区间越低则其对应的物理层小区 ID分组的优先级越高。 本发明实施例还提供一种扰码分配方法, 包括:
确定未分配物理层小区标识号 ID的小区的干扰情况;
按照各物理层小区 ID分组的优先级从高到低的顺序, 从各所述物理层小区 ID分组中选 择物理层小区 ID, 优先分配给所述未分配物理层小区 ID的小区中千扰较大的小区;
使用各小区分配到的物理层小区 ID, 分别确定出各小区的每个信道使用的扰码。 本发明实施例还提供一种物理层小区 ID分组系统, 包括:
第一扰码确定模块, 用于针对指定的多个信道中的每个信道, 使用可分配的各物理层 小区标识号 ID, 确定出该信道使用的与所述各物理层小区 ID分别对应的各扰码;
指标值确定模块, 用于确定出每个信道使用的各扰码中每两个扰码的相关性指标值; 划分模块, 用于将确定出的相关性指标值划分到各预设指标值区间中;
分组模块, 用于基于所述各预设指标值区间中的每个相关性指标值所对应的两个扰码 分别对应的物理层小区 ID, 将所述各物理层小区 ID分配到分别与所述各预设指标值区间对 应的各物理层小区 ID分组中; 所述预设指标值区间越低则其对应的物理层小区 ID分组的优 先级越高。
本发明实施例还提供一种扰码分配系统, 包括:
千扰确定模块, 用于确定未分配物理层小区标识号 ID的小区的干扰情况; 分配模块, 用于按照各物理层小区 Π)分组的优先级从高到低的顺序, 从各所述物理层 小区 ID分组中选择物理层小区 ID, 优先分配给所述未分配物理层小区 ID的小区中干扰较大 的小区;
第二扰码确定模块, 用于使用各小区分配到的物理层小区 ID, 分别确定出各小区的每 个信道使用的扰码。
本发明实施例提供的物理层小区 ID分组方法中, 首先针对指定的多个信道中的每个信 道, 使用可分配的各物理层小区 ID, 确定出该信道使用的与所述各物理层小区 ID分别对应 的扰码, 并确定出每个信道使用的各扰码中每两个扰码的相关性指标值; 然后将确定出的 相关性指标值划分到各预设指标值区间中, 并基于各预设指标值区间中的每个相关性指标 值所对应的两个扰码分别对应的物理层小区 ID, 将各物理层小区 ID分配到分别与各预设指 标值区间对应的各物理层小区 ID分组中, 且确定预设指标值区间越低则其对应的物理层小 区 ID分组的优先级越高。 由于在对各物理层小区 ID进行分组时, 是基于需要使用扰码的多 个信道能够使用的全部扰码, 考虑了扰码之间的相关性, 所以得到的物理层小区 ID的分组 结果, 全面的反应了这多个信道能够使用的全部扰码的性能的优劣情况, 所以, 基于该物 理层小区 ID的分组结果, 按照各物理层小区 ID分组优先级从高到低的顺序, 从各物理层小 区 ID分组中选择物理层小区 ID, 分配给各小区, 并使用分配到的物理层小区 ID, 确定出各 小区的每个信道使用的扰码, 实现了针对 LTE系统更合理的进行扰码分配, 进而提高了使 用扰码进行通信时的通信质量。
并且, 本发明实施例提供的扰码分配方法中, 将优先级高的物理层小区 ID分组中的物 理层小区 ID, 分配给未分配物理层小区 ID的小区中干 4尤较大的小区, 即在进行物理层小区 ID的分配时, 参考了各小区的千扰大小情况, 可以更佳准确的反映出实际网络的情况, 使 得物理层小区 ID的分配更合理, 进而使得扰码的分配更符合实际网络的情况。 附图说明 图 1为本发明实施例提供的物理层小区 ID分组方法的流程图;
图 2为本发明实施例提供的扰码分配方法的流程图;
图 3为本发明实施例 1提供的物理层小区 ID分组方法的流程图;
图 4为本发明实施例 2提供的扰码分配方法的流程图;
图 5为本发明实施例 3提供的物理层小区 ID分组系统的结构示意图;
图 6为本发明实施例 4提供的扰码分配系统的结构示意图。 具体实施方式 为了给出提高针对 LTE系统进行扰码分配的合理性, 进而提高使用扰码进行通信时的 通信质量的实现方案, 本发明实施例提供了一种物理层小区 ID分组方法、 扰码分配方法及 系统, 以下结合说明书附图对本发明的优选实施例进行说明, 应当理解, 此处所描述的优 选实施例仅用于说明和解释本发明, 并不用于限定本发明。 并且在不冲突的情况下, 本申 请中的实施例及实施例中的特征可以相互组合。
本发明实施例提供一种物理层小区 ID分组方法, 如图 1所示, 包括:
步骤 S101、 针对指定的多个信道中的每个信道, 使用可分配的各物理层小区 ID, 确定 出该信道使用的与各物理层小区 ID分别对应的扰码。
步骤 S102、 确定出每个信道使用的各扰码中每两个扰码的相关性指标值。
步骤 S103、 将确定出的相关性指标值划分到各预设指标值区间中。
步驟 S104、 基于各预设指标值区间中的每个相关性指标值所对应的两个扰码分别对应 的物理层小区 ID, 将各物理层小区 ID分配到分别与各预设指标值区间对应的各物理层小区 ID分组中; 其中, 预设指标值区间越低则其对应的物理层小区 ID分组的优先級越高。
本发明实施例还提供一种扰码分配方法, 如图 2所示, 包括:
步骤 S201、 确定未分配物理层小区标识号 ID的小区的干扰情况。
步驟 S202、 按照各物理层小区 ID分组优先级从高到低的顺序, 从各物理层小区 ID分组 中选择物理层小区 ID , 优先分配给所述未分配物理层小区 ID的小区中干扰较大的小区。 步骤 S203、 使用各小区分配到的物理层小区 ID, 分别确定出各小区的每个信道使用的 扰码。
下面结合附图, 用具体实施例对本发明提供的物理层小区 ID分组方法及系统进行详细 描述。
实施例 1 :
图 3所示为本发明实施例 1提出的物理层小区 ID分组方法的流程图, 具体包括: 步骤 S301、 从需要使用扰码的多个信道中指定多个信道, 用于进行物理层小区 ID分组 所参考的信道, 具体可根据实际需要进行指定, 本发明实施例中, 以指定的信道包括: PBCH、 物理下行控制信道 PDCCH ( physical downlink control channel )和物理格式指示信 道 PCFICH为例。
确定出可分配的各物理层小区 ID, 依据现有技术可知, 对于目前的 LTE系统而言, 可 分配的全部物理层小区 ID共计 504个, 本发明实施例中可以将这 504个物理层小区 ID均作为 可分配的各物理层小区 ID , 也可以根据实际需要选择其中的一部分作为可分配的各物理层 小区 ID。
步驟 S302、 在确定出需要使用扰码的多个信道和可分配的各物理层小区 ID后, 针对每 个信道, 使用各物理层小区 ID , 确定出该信道使用的与各物理层小区 ID分别对应的扰码, 即对于每个信道而言, 针对每个物理层小区 ID确定出一个对应的扰码, 具体如下:
扰码为一个 31位的伪随机序列, 是由 2条 mesh ( m-sequence )序列通过运算生成的, 公 式如下:
c(n) = (¾j (n + Nc) + x2(n + Nc))mod 2;
Xj + 31) = (Xj (n + 3) + j (n)) mod 2;
x2(n + 3 Y) = (x2 (n + 3) + x2 (n + 2) + x2(n + Y) + x2 (n))mod 2;
其中, 为扰码的第 n-1位的值; Ne = 1600 ;
为第一条 m序列的第 n-1位的值, 且第一条 m序列的初始值为 χ, (0) = 1; 当 η取 1-30 之间的整数时, 0) = 0;
χ2(«)为第二条 m序列的第 n-1位的值, 且第二条 m序列的 0-30位的初始值与每个信道相 关, 针对不同的信道, 具体可以采用如下方式进行确定:
针对 PBCH信道: 首先采用如下公式确定出扰码生成时使用的初始化参数:
CImt = Ν^"; 其中, N "为物理层小区 ID;
然后根据该初始化参数确定出该物理层小区 ID对应的扰码。
针对 PDCCH信道: 首先采用如下公式确定出扰码生成时使用的初始化参数:
CImt = lns
Figure imgf000006_0001
29 + N ; 其中, N^"为物理层小区 ID, 为无线帧的时隙号; 然后根据该初始化参数确定出该物理层小区 ID对应的扰码。
针对 PCFICH信道: 首先采用如下公式确定出扰码生成时使用的初始化参数:
CImt = / 2 J + 1) * (2 * N + 1) * 29 + N ; 其中, N^"为物理层小区 ID, 为无线帧 的时隙号;
本发明实施例中, 对于 可以在其变化范围内随机选取。
初始化参数 C∞i的二进制数的每位的值即为第二条 m序列的 0-30位的初始值, 当 Clmt的 二进制数不足 30位时, 从高位补 0。
步骤 S303、 在确定出每个信道使用的与各物理层小区 ID分别对应的扰码后, 即确定出 了每个信道可以使用的各扰码, 然后, 针对每个信道, 确定出该信道使用的各扰码中每两 个扰码的相关性指标值。
对于两个扰码的相关性指标值具体采用如下公式确定:
¾ =丄^^ ; 其中, 为扰码 α和扰码 6的相关性指标值, N为扰码的位数, α,为 扰码 α的第 i位的值, 为扰码 6的第 i位的值。
考虑到系统中的延迟, 还可以采用如下公式确定两个扰码的相关性指标值, 采用该公 式确 出的相关性指标值也可以称为循环位移互相关性指标值:
Figure imgf000007_0001
步骤 S304、 本发明实施例中, 预先设定了多个指标值区间, 从上述相关性指标值的确 定公式可知, 相关性指标值的范围在 [0,1]之间, 所以, 可以将 [0,1]划分为多个指标值区间。
各预设指标值区间的数量, 具体可以根据实际需要进行确定, 数量越大, 则后续对应 的物理层小区 ID分组的数量越多, 进而对物理层小区 ID的分组越精细, 最终得到的扰码分 配结果更合理, 但计算量也越大。
各预设指标值区间的长度可以相同, 也可以不同, 具体可以根据实际需要进行设置, 例如, 对于预设指标值区间较低的区间, 可以确定其长度较小, 以便保证后续确定出的高 优先级的物理层小区 ID分组中的物理层小区 ID越精细, 最终得到的扰码分配结果更合理。
基于各预设指标值区间, 将确定出的相关性指标值划分到各预设指标值区间中, 本发 明实施例中提出如下两种具体的划分方式:
第一种方式: 针对各信道分别划分, 即针对每个信道, 分别将该信道使用的各扰码中 的每两个扰码的相关性指标值划分到各预设指标值区间中, 得到与该信道对应的相关性指 标值划分结果; 即每个信道对应一个相关性指标值划分结果。
第二种方式: 针对全部信道总体划分, 即将针对每个信道确定出的全部相关性指标值 划分到各预设指标值区间中; 即只得到一个总体划分结果。
步骤 S305、 对各物理层小区 ID进行分组。
基于各预设指标值区间中的每个相关性指标值所对应的两个扰码分别对应的物理层 小区 ID , 将各物理层小区 ID分配到分别与各预设指标值区间对应的各物理层小区 ID分组 中, 且确定预设指标值区间越低则其对应的物理层小区 ID分组的优先级越高。 针对上述步 驟 S304中相关性指标值的划分方式不同, 相应的提出如下具体的物理层小区 ID的分组方 式:
第一种方式: 与上述针对各信道分别划分相关性指标值的方式对应, 首先针对每个信 道, 基于该信道对应的相关性指标值划分结果, 将各物理层小区 ID分配到分别与各预设指 标值区间对应的各物理层小区 ID分组中, 得到与该信道对应的物理层小区 ID分组结果。
然后基于各信道分别对应的物理层小区 ID分组结果, 确定出各物理层小区 ID分组中最 终分配到的物理层小区 ID, 具体可以如下:
基于各信道分别对应的物理层小区 ID分组结果, 确定出每个物理层小区 ID分组中存在 的物理层小区 ID; 即针对每个信道,确定出每个物理层小区 ID分组中存在的物理层小区 ID, 如表 1所示:
表 1
Figure imgf000008_0001
上述表 1中 "存在的 ID" —栏所示即为确定出的每个物理层小区 ID分组中存在的物理 层小区 ID, 且物理层小区 ID分组 1-3的优先级依次降低;
将仅在一个物理层小区 ID分组中存在的物理层小区 ID, 分配到该物理层小区 ID分组 中; 例如, 上述表 1中 ID1和 ID2仅在物理层小区 ID分组 1中存在, 则将 ID1和 ID2最终分配到 物理层小区 ID分组 1中;
将在不同物理层小区 ID分组中存在的同一个物理层小区 ID, 分配到该不同物理层小区 ID分组中优先级最低的物理层小区 ID分组中, 最终分配结果如表 2所示:
表 2
Figure imgf000008_0002
信道 2 ID1、 ID2、 ID4 ID3、 ID8 ID5、 ID6、 ID7 信道 3 ID1、 ID2、 ID3 ID4、 ID5、 IDS ID6、 ID7 存在的 ID ID1、 ID2、 ID3、 ID4 ID3、 ID4、 ID5、 ID8 ID5、 ID6、 ID7、 ID8 最终分配结果 ID1、 ID2、 ID3、 ID4 ID5、 ID6、 ID7、 ID8
本发明实施例中, 也可以将在不同物理层小区 ID分组中存在的同一个物理层小区 ID, 分配到该不同物理层小区 ID分组中优先级最高的物理层小区 ID分组中, 最终分配结果如表 3所示:
表 3
Figure imgf000009_0002
相比上述表 3所示的分组方式, 上述表 2所示的分组方式更能保证高优先级的物理层小 区 ID分组中的物理层小区 ID所对应的扰码的性能。
第二种方式: 与上述针对全部信道总体划分相关性指标值的方式对应, 基于全部相关 性指标值的总体划分结果, 将各物理层小区 ID分配到分别与各预设指标值区间对应的各物 理层小区 ID分组中, 直接得到最终的物理层小区 ID分组结果。
本发明实施例中, 在将各物理层小区 ID分配到分别与各预设指标值区间对应的各物理 层小区 ID分组中时, 无论是上述第一种方式中基于单个信道对应的相关性指标值划分结 果, 还是上述第二种方式中基于全部相关性指标值的总体划分结果, 均可以采用如下方案 进行分组:
基于将相关性指标值划分到各预设指标值区间的结果, 确定出每个预设指标值区间中 的每个相关性指标值所对应的两个扰码分别对应的物理屋小区 ID; 即针对每个预设指标值 区间, 确定出一组物理层小区 ID , 确定结果可能会出现 针对不同的预设指标值区间, 确 定出相同的物理层小区 ID的情况, 也可能出现一个物理层小区 ID仅从一个预设指标值区间 中确定出的情况; 如表 4所示:
表 4
Figure imgf000009_0001
Figure imgf000010_0001
上述表 1中 "确定出的 ID" —栏所示即为针对每个预设指标值区间确定出的物理层小 区 ID, 且区间 1-3依次升高;
将仅从一个预设指标值区间中确定出的物理层小区 ID, 分配到与该预设指标值区间对 应的物理层小区 ID分组中; 例如, 上述表 1中 ID1和 ID2是仅从区间 1中确定出的, 则将 ID1 和 ID2最终分配到与区间 1对应的物理层小区 ID分组 1中;
将从不同预设指标值区间中均确定出的物理层小区 ID, 分配到该不同预设指标值区间 分别对应的不同物理层小区 ID分组中优先级最低的物理层小区 ID分组中 , 最终分配结果如 表 5所示:
表 5
Figure imgf000010_0002
本发明实施例中, 还可以将从不同预设指标值区间中均确定出的物理层小区 ID, 分配 到该不同预设指标值区间分别对应的不同物理层小区 ID分组中优先级最高的物理层小区 ID分组中, 最终的分配结果如表 6所示:
表 6
Figure imgf000010_0003
通过上述步骤 S301-305 , 完成了对可分配的各物理层小区 ID的分组, 且确定了每个物 理层小区 ID分组的优先级, 则后续即可以基于该分组结果进行扰码的分配。
下面在实施例 2中对基于设置优先级的各物理层小区 ID的分组, 进行扰码分配的方案, 进行详细描述。
实施例 2:
图 4所示为本发明实施例 2提出的扰码分配方法的流程图, 具体包括:
步骤 S401、 从需要进行物理层小区 ID分配(也即扰码分配) 的全部小区中, 选择出设 定数量的小区, 进行首次物理层小区 ID的分配。 其中, 对于这设定数量的小区的选择, 可 以随机选择, 也可以根据实际需要进行指定, 较佳的也可以根据各小区的千扰情况, 选择 出干扰较大的设定数量的小区, 其中, 小区的干扰情况可通过网络仿真进行确定, 例如, 综合考虑小区的 PBCH信道、 PDCCH信道和 PCFICH信道的信噪比进行确定,在此不再进行 详细描述。
按照各物理层小区 ID分组的优先级从高到低的顺序, 从各物理层小区 ID分组中选择出 设定数量的物理层小区 ID, 依次分配给选择出的这设定数量的小区, 并且优先分配给其中 千扰较大的小区。
在分配时还可以参考小区之间的同频复用距离, 即对于该设定数量的小区中的每两个 小区, 满足如果这两个小区之间的距离小于这两个小区之间的同频复用距离, 则这两个小 区所分配的物理层小区 ID不同。 其中, 小区之间的同频复用距离与这两个小区的同频 /异频 关系相关, 具体可采用现有技术进行确定, 在此不再进行详细描述。
在选择物理层小区 ID时, 对于同一个物理层小区 Π)分组中的各物理层小区 ID, 可以随 机选择, 在优先级较高的物理层小区 ID分组中的物理层小区 ID均已分配时, 选择下一优先 级的物理层小区 ID分组中的物理层小区 ID进行分配。
步驟 S402、 基于已分配物理层小区 ID的小区, 对未分配物理层小区 ID的小区, 进行物 理层小区 ID的分配, 具体如下:
针对一个已分配物理层小区 ID的小区, 在该小区的指定距离内, 从需要进行物理层小 区 ID分配的全部小区中, 确定出未分配物理层小区 ID的小区, 并针对确定出的未分配物理 层小区 ID的小区, 按照各物理层小区 ID分组优先级从高到低的顺序, 从各物理层小区 ID分 组中选择物理层小区 ID, 分配给确定出的未分配物理层小区 ID的小区。 其中, 指定距离可 根据实际需要和经验值进行灵活设置。
较佳的, 也可以在分配前确定出未分配物理层小区 ID的小区的干扰情况, 并优先将优 先级高的物理层小区 ID分组中的物理层小区 ID, 分配给干扰大的小区。
在分配时同样还可以参考小区之间的同频复用距离, 例如, 基于未分配物理层小区 ID 的小区的一个待分配小区, 对该待分配小区分配物理层小区 ID之前, 首先确定其与已分配 物理层小区 ID的每个已分配小区之间的同频复用距离, 并且判断与每个已分配小区之间的 同频复用距离, 是否大于与该已分配小区之间的距离, 如果大于, 则可以分配与该已分配 小区相同的物理层小区 ID, 如果不大于, 则需要分配与该已分配小区的物理层小区 ID不同 的物理层小区 ID。
步骤 S403、 判断需要进行物理层小区 ID分配的全部小区, 是否全部分配了物理层小区 ID, 如果, 进入步骤 S404, 否则, 进入步骤 S402。
步骤 S404、 使用各小区分配到的物理层小区 ID, 分别确定出各小区的每个信道使用的 扰码, 具体可以采用上述实施例 1中的步驟 S302中的针对每种信道进行确定, 在此不再进 行详细描述。
LTE系统中的扰码在数量、 长度和使用等诸多方面与现存的无线通信系统存在着较大 的差异, 例如, LTE系统中每个小区的扰码不是唯一的, 而是根据使用的信道不同而不同, 如 PBCH信道的扰码只与该小区的物理层小区 ID有关, 而 PDCCH则与该小区的物理层小区 ID和所在无线帧的时隙号有关。 然而, 现有技术针对非 LTE的网络系统进行扰码分配的方 案中,均是针对每个小区分配的扰码唯一进行分配的,所以, 筒单的将现有方案应用于 LTE 系统, 会使扰码分配的结果与实际情况造成很大出入, 影响网络规划质量, 同时为后期网 络的优化增加难度。
本发明实施例 1提供的物理层小区 ID分组方法及扰码分配方法中,基于 LTE系统与现存 的无线通信系统之间存在的该差异的考虑, 首先确定出需要使用扰码的多个信道中每个信 道所能够使用的扰码, 并根据扰码之间的相关性, 对确定扰码所需要的各物理层小区 ID进 行分组, 并划分各物理层小区 ID分组的优先级, 使得优先级高的物理层小区 ID分组中的物 理层小区 ID所确定出的扰码性能更佳, 从而能够基于该物理层小区 ID的分组结果, 按照各 物理层小区 ID分组优先级从高到低的顺序, 选择物理层小区 ID, 为各小区分配扰码, 进而 实现了针对 LTE系统更合理的进行扰码分配, 提高了使用扰码进行通信时的通信质量。
并且, 本发明实施例 2提供的方案中在进行物理层小区 ID的分配时, 参考了各小区的 千扰大小情况,可以更佳准确的反映出实际网络的情况,使得物理层小区 ID的分配更合理, 进而使得扰码的分配更符合实际网络的情况。
实施例 3 :
基于同一发明构思, 根据本发明上述实施例提供的方法, 相应地, 本发明实施例 3还 提供了一种物理层小区 ID分组系统, 其结构示意图如图 5所示, 具体包括:
第一扰码确定模块 501 , 用于针对指定的多个信道中的每个信道, 使用可分配的各物 理层小区标识号 ID, 确定出该信道使用的与各物理层小区 ID分别对应的扰码;
指标值确定模块 502 , 用于确定出每个信道使用的各扰码中每两个扰码的相关性指标 值;
划分模块 503 , 用于将确定出的相关性指标值划分到各预设指标值区间中; 分组模块 504 , 用于基于各预设指标值区间中的每个相关性指标值所对应的两个扰码 分别对应的物理层小区 ID, 将各物理层小区 ID分配到分别与各预设指标值区间对应的各物 理层小区 ID分组中; 预设指标值区间越低则其对应的物理层小区 ID分组的优先级越高。
较佳的, 划分模块 503, 具体用于针对每个信道, 分别将确定出的该信道使用的各扰 码中的每两个扰码的相关性指标值划分到各预设指标值区间中, 得到与该信道对应的相关 性指标值划分结果; 分组模块 504, 具体用于针对每个信道, 基于该信道对应的所述相关性指标值划分结 果, 将各物理层小区 ID分配到分别与各预设指标值区间对应的各物理层小区 ID分组中, 得 到与该信道对应的物理层小区 ID分组结果; 并基于各信道分别对应的所述物理层小区 ID分 组结果, 确定出所述各物理层小区 ID分组中最终分配到的物理层小区 ID。
较佳的, 分组模块 504, 具体用于基于各信道分别对应的物理层小区 ID分组结果, 确 定出每个物理层小区 ID分组中存在的物理层小区 ID; 并将仅在一个物理层小区 ID分组中存 在的物理层小区 ID, 分配到该物理层小区 ID分组中; 以及将在不同物理层小区 ID分组中存 在的同一个物理层小区 ID, 分配到该不同物理层小区 ID分组中优先级最低的物理层小区 ID 分组中, 或者分配到该不同物理层小区 ID分组中优先级最高的物理层小区 ID分组中。
较佳的, 分组模块 504, 具体用于确定出每个预设指标值区间中的每个相关性指标值 所对应的两个扰码分别对应的物理层小区 ID; 并将仅从一个预设指标值区间中确定出的物 理层小区 ID, 分配到与该预设指标值区间对应的物理层小区 ID分组中; 以及将从不同预设 指标值区间中均确定出的物理层小区 ID, 分配到该不同预设指标值区间分别对应的不同物 理层小区 ID分组中优先级最低的物理层小区 ID分组中, 或者分配到该不同预设指标值区间 分别对应的不同物理层小区 ID分组中优先级最高的物理层小区 ID分组中。
实施例 4:
基于同一发明构思, 根据本发明上述实施例提供的方法, 相应地, 本发明实施例 4还 提供了一种扰码分配系统, 其结构示意图如图 6所示, 具体包括:
千扰确定模块 601 , 用于确定未分配物理层小区 ID的小区的干扰情况;
分配模块 602, 具体按照各物理层小区 ID分组的优先级从高到低的顺序, 从各物理层 小区 ID分组中选择物理层小区 ID, 优先分配给未分配物理层小区 ID的小区中干扰较大的小 区;
第二扰码确定模块 603 , 用于使用各小区分配到的物理层小区 Π) , 分别确定出各小区 的每个信道使用的扰码。
较佳的, 分配模块 602, 具体用于基于确定的干扰情况, 确定未分配物理层小区 Π)的 小区中干扰较大的小区; 并从已分配物理层小区 ID的小区中, 确定与千扰较大的小区之间 的距离小于同频复用距离的小区; 以及按照各物理层小区 ID分组优先级从高到低的顺序, 从各物理层小区 ID分组中选择物理层小区 ID, 分配给干扰较大的小区, 其中, 选择的物理 层小区 ID与小于同频复用距离的小区的物理层小区 ID不同。
千扰确定模块 601 , 具体用于在离已分配物理层小区 ID的一个小区的指定距离内, 确 定未分配物理层小区 ID的小区; 并确定未分配物理层小区 ID的小区的干扰情况。
综上所述, 本发明实施例提供的方案, 包括: 针对指定的多个信道中的每个信道, 使 用可分配的各物理层小区 ID , 确定出该信道使用的与所述各物理层小区 ID分别对应的扰 码; 并确定出每个信道使用的各扰码中每两个扰码的相关性指标值; 并将确定出的相关性 指标值划分到各预设指标值区间中; 并基于各预设指标值区间中的每个相关性指标值所对 应的两个扰码分别对应的物理层小区 ID, 将各物理层小区 ID分配到分别与各预设指标值区 间对应的各物理层小区 ID分组中; 其中, 预设指标值区间越低则其对应的物理层小区 ID分 组的优先级越高。 采用本发明实施例提供的方案, 解决现有技术中存在的无法合理的针对 LTE系统进行扰码分配的问题。
显然, 本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和 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
1、 一种物理层小区识别号 ID分组方法, 其特征在于, 包括:
针对指定的多个信道中的每个信道, 使用可分配的各物理层小区 ID, 确定出该信道使 用的与所述各物理层小区 ID分别对应的扰码;
确定出每个信道使用的各扰码中每两个扰码的相关性指标值;
将确定出的相关性指标值划分到各预设指标值区间中;
基于所述各预设指标值区间中的每个相关性指标值所对应的两个扰码分别对应的物 理层小区 ID, 将所述各物理层小区 ID分配到分别与所述各预设指标值区间对应的各物理层 小区 ID分组中; 所述预设指标值区间越低则其对应的物理层小区 ID分组的优先级越高。
2、 如权利要求 1所述的方法, 其特征在于, 将确定出的相关性指标值划分到各预设指 标值区间中, 具体为:
针对每个信道, 分别将确定出的该信道使用的各扰码中的每两个扰码的相关性指标值 划分到各预设指标值区间中, 得到与该信道对应的相关性指标值划分结果;
基于所述各预设指标值区间中的每个相关性指标值所对应的两个扰码分别对应的物 理层小区 ID, 将所述各物理层小区 ID分配到分别与所述各预设指标值区间对应的各物理层 小区 ID分组中, 具体包括:
针对每个信道, 基于该信道对应的所述相关性指标值划分结果, 将所述各物理层小区 ID分配到分别与所述各预设指标值区间对应的各物理层小区 ID分组中, 得到与该信道对应 的物理层 ID分组结果;
基于各信道分别对应的所述物理层 ID分组结果, 确定出所述各物理层小区 ID分组中最 终分配到的物理层小区 ID。
3、 如权利要求 2所述的方法, 其特征在于, 基于各信道分别对应的所述物理层小区 ID 分组结果, 确定出所述各物理层小区 ID分组中最终分配到的物理层小区 ID, 具体包括: 基于各信道分别对应的所述物理层小区 ID分组结果, 确定出每个物理层小区 ID分组中 存在的物理层小区 ID;
将仅在一个物理层小区 ID分组中存在的物理层小区 ID, 分配到该物理屋小区 ID分组 中;
将在不同物理层小区 ID分组中存在的同一个物理层小区 ID, 分配到该不同物理层小区 ID分组中优先级最低的物理层小区 ID分组中, 或者分配到该不同物理层小区 ID分组中优先 级最高的物理层小区 ID分组中。
4、 如权利要求 1或 2所述的方法, 其特征在于, 将所述各物理层小区 ID分配到分别与 所述各预设指标值区间对应的各物理层小区 ID分组中, 具体包括: 确定出每个预设指标值区间中的每个相关性指标值所对应的两个扰码分别对应的物 理层小区 ID;
将仅从一个预设指标值区间中确定出的物理层小区 ID, 分配到与该预设指标值区间对 应的物理层小区 ID分组中;
将从不同预设指标值区间中均确定出的物理层小区 ID, 分配到该不同预设指标值区间 分别对应的不同物理层小区 ID分组中优先级最低的物理层小区 ID分组中, 或者分配到该不 同预设指标值区间分别对应的不同物理层小区 ID分组中优先级最高的物理层小区 ID分组 中。
5、 一种扰码分配方法, 其特征在于, 包括:
确定未分配物理层小区标识号 ID的小区的千扰情况;
按照各物理层小区 ID分组的优先级从高到低的顺序, 从各所述物理层小区 ID分组中选 择物理层小区 ID, 优先分配给所述未分配物理层小区 ID的小区中干扰较大的小区;
使用各小区分配到的物理层小区 ID, 分别确定出各小区的每个信道使用的扰码。
6、 如权利要求 5所述的方法, 其特征在于, 按照各物理层小区 ID分组的优先级从高到 低的顺序, 从各所述物理层小区 ID分组中选择物理层小区 ID, 优先分配给所述未分配物理 层小区 ID的小区中干扰较大的小区, 具体包括:
基于确定的所述干扰情况, 确定所述未分配物理层小区 ID的小区中干扰较大的小区; 从已分配物理层小区 ID的小区中, 确定与所述干扰较大的小区之间的距离小于同频复 用 巨离的小区;
按照各所述物理层小区 ID分组优先级从高到低的顺序, 从各所述物理层小区 ID分组中 选择物理层小区 ID, 分配给所述千扰较大的小区, 其中, 所述选择的物理层小区 ID与所述 小于同频复用距离的小区的物理层小区 ID不同。
7、 如权利要求 5或 6所述的方法, 其特征在于, 确定出未分配物理层小区 ID的小区的 千扰情况, 具体包括:
在离已分配物理层小区 ID的一个小区的指定距离内, 确定未分配物理层小区 ID的小 区;
确定所述未分配物理层小区 ID的小区的干扰情况。
8、一种物理层小区识别号 ID分组系统, 其特征在于, 包括:
第一扰码确定模块, 用于针对指定的多个信道中的每个信道, 使用可分配的各物理层 小区标识号 ID, 确定出该信道使用的与所述各物理层小区 ID分别对应的扰码;
指标值确定模块, 用于确定出每个信道使用的各扰码中每两个扰码的相关性指标值; 划分模块, 用于将确定出的相关性指标值划分到各预设指标值区间中;
分组模块, 用于基于所述各预设指标值区间中的每个相关性指标值所对应的两个扰码 分别对应的物理层小区 ID, 将所述各物理层小区 ID分配到分别与所述各预设指标值区间对 应的各物理层小区 ID分组中; 所述预设指标值区间越低则其对应的物理层小区 ID分组的优 先级越高。
9、 如权利要求 8所述的系统, 其特征在于, 所述划分模块, 具体用于针对每个信道, 分别将确定出的该信道使用的各扰码中的每两个扰码的相关性指标值划分到各预设指标 值区间中, 得到与该信道对应的相关性指标值划分结果;
所述分组模块, 具体用于针对每个信道, 基于该信道对应的所述相关性指标值划分结 果, 将所述各物理层小区 ID分配到分别与所述各预设指标值区间对应的各物理层小区 ID分 组中, 得到与该信道对应的物理层小区 ID分组结果; 并基于各信道分别对应的所述物理层 小区 ID分组结果, 确定出所述各物理层小区 ID分组中最终分配到的物理层小区 ID。
10、 如权利要求 9所述的系统, 其特征在于, 所述分组模块, 具体用于基于各信道分 别对应的所述物理层小区 ID分组结果, 确定出每个物理层小区 ID分组中存在的物理层小区 ID; 并将仅在一个物理层小区 ID分组中存在的物理层小区 ID, 分配到该物理层小区 ID分组 中; 以及将在不同物理层小区 ID分组中存在的同一个物理层小区 ID, 分配到该不同物理层 小区 ID分组中优先级最低的物理层小区 ID分组中 , 或者分配到该不同物理层小区 ID分组中 优先级最高的物理层小区 ID分组中。
11、 如权利要求 8或 9所述的系统, 其特征在于, 所述分组模块, 具体用于确定出每个 预设指标值区间中的每个相关性指标值所对应的两个扰码分别对应的物理层小区 ID; 并将 仅从一个预设指标值区间中确定出的物理层小区 ID, 分配到与该预设指标值区间对应的物 理层小区 ID分组中; 以及将从不同预设指标值区间中均确定出的物理层小区 ID, 分配到该 不同预设指标值区间分别对应的不同物理层小区 ID分组中优先级最低的物理层小区 ID分 组中, 或者分配到该不同预设指标值区间分别对应的不同物理层小区 ID分组中优先级最高 的物理层小区 ID分组中。
12、 一种扰码分配系统, 其特征在于, 包括:
干扰确定模块, 用于确定未分配物理层小区标识号 ID的小区的干扰情况; 分配模块, 用于按照各物理层小区 ID分组的优先级从高到低的顺序, 从各所述物理层 小区 ID分组中选择物理层小区 ID, 优先分配给所述未分配物理层小区 ID的小区中干扰较大 的小区;
第二扰码确定模块, 用于使用各小区分配到的物理层小区 ID, 分别确定出各小区的每 个信道使用的扰码。
13、 如权利要求 12所述的系统, 其特征在于, 所述分配模块, 具体用于基于确定的所 述干扰情况, 确定所述未分配物理层小区 ID的小区中干扰较大的小区; 并从已分配物理层 小区 ID的小区中, 确定与所述干扰较大的小区之间的距离小于同频复用距离的小区; 以及 按照各所述物理层小区 ID分组优先级从高到低的顺序, 从各所述物理层小区 ID分组中选择 物理层小区 ID, 分配给所述千扰较大的小区, 其中, 所述选择的物理层小区 ID与所述小于 同频复用距离的小区的物理层小区 ID不同。
14、 如权利要求 12或 13所述的系统, 其特征在于, 所述千扰确定模块, 具体用于在离 已分配物理层小区 ID的一个小区的指定距离内, 确定未分配物理层小区 ID的小区; 并确定 所述未分配物理层小区 ID的小区的干扰情况。
PCT/CN2011/084326 2010-12-31 2011-12-21 物理层小区id分组方法、扰码分配方法及系统 WO2012089052A1 (zh)

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