WO2011106969A1 - Procédé et dispositif permettant d'allouer une identification de cellule physique - Google Patents

Procédé et dispositif permettant d'allouer une identification de cellule physique Download PDF

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Publication number
WO2011106969A1
WO2011106969A1 PCT/CN2010/076884 CN2010076884W WO2011106969A1 WO 2011106969 A1 WO2011106969 A1 WO 2011106969A1 CN 2010076884 W CN2010076884 W CN 2010076884W WO 2011106969 A1 WO2011106969 A1 WO 2011106969A1
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WIPO (PCT)
Prior art keywords
cell
pci
new
enb
newly
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PCT/CN2010/076884
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English (en)
Chinese (zh)
Inventor
马松
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中兴通讯股份有限公司
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Publication of WO2011106969A1 publication Critical patent/WO2011106969A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a physical cell identification (Physical Cell Identification, PCI) allocation technology.
  • PCI Physical Cell Identification
  • the cell reference signal is mainly used for channel estimation and correlation demodulation.
  • the frequency domain location of the reference signal of the same-frequency neighboring cell is the same, which causes The reference signals between adjacent cells generate relatively serious mutual interference, resulting in inaccurate channel estimation results, thus affecting the stability of the entire system.
  • the frequency domain location of the cell reference signal is related to the physical cell ID, and the time domain relationship and the frequency domain relationship are:
  • the location of the cell reference signal is different according to the PCI.
  • the reference signals of the two cells may generate strong interference, which causes errors when the UEs at the edge of the two cells perform channel estimation. Summary of the invention
  • the technical problem to be solved by the present invention is to overcome the problem of mutual interference between adjacent intra-frequency cell reference signals caused by improper allocation of adjacent PCI values in the PCI allocation process.
  • an aspect of the present invention provides a method for allocating a PCI, including: when a new cell is established, it is determined whether the PCI value allocated by the newly-created cell is equal to or equal to the following congruence relationship with the PCI value w of the same-frequency neighboring cell. :
  • the method is specifically:
  • the method is specifically:
  • the source end eNB of the newly built cell notifies the peer eNB of the PCI of the newly built cell;
  • the PCI of the newly-created cell may cause interference with the peer-to-peer neighboring-area reference signal; otherwise, the signaling of the source-side eNB indicates that the PCI of the newly-created cell does not cause the same as the opposite end.
  • the source eNB learns that the PCI of the newly-created cell causes interference between neighboring intra-frequency cell reference signals of other eNBs, it provides a recommended PCI value for the newly-created cell.
  • the method for giving the suggested PCI value to the newly created cell is specifically:
  • step A2 traversing the PCI of the same-frequency neighboring cell in the eNB of the newly-created cell, and checking whether the relationship with the newly obtained PCI value 'satisfies the congruence relationship. If yes, step A1 is performed. Otherwise, the newly obtained PCI value is used as a suggestion for the new cell. PCI value.
  • the method further includes the step of notifying the OMC that the PCI of the newly-created cell causes a reference signal interference of the same-frequency neighboring cell.
  • the source end eNB and the opposite end eNB perform signaling interaction on the PCI of the new cell through the X2 interface.
  • a redistribution module configured to re-allocate a new PCI to the newly created cell when the PCI value of the newly created cell satisfies the congruence relationship.
  • the device when the new cell is not in the same eNB as the same-frequency neighboring cell, the device further includes:
  • a notification module configured to notify a PCI of the new cell to an eNB of the opposite end
  • the second judging module is configured to determine whether the PCI of the newly-created cell and the PCI of the same-frequency neighboring cell of the opposite eNB satisfy the congruence relationship ⁇ w mod 6 ;
  • a response module configured to send, to the redistribution module, a determination result of the second determining module, if When the congruence relationship is satisfied, the redistribution module indicates the new cell by using a signaling message.
  • the PCI may cause interference with the reference signal of the peer-to-peer neighboring cell; otherwise, the signaling of the new cell of the redistribution module is not caused by the signaling message to cause interference with the reference signal of the same-frequency neighboring cell in the peer end. ;
  • the redistribution module is further configured to re-allocate the new cell to the new cell when it learns that the PCI of the new cell causes interference between neighboring intra-frequency cell reference signals of other eNBs.
  • the redistribution module includes:
  • a decision module configured to: when the evaluation module outputs a new PCI value, traverse the PCI of the same-frequency neighboring cell in the eNB of the new cell, and check whether the congruence relationship is satisfied with the new PCI value, if satisfied, Then, the evaluation module is notified to perform, otherwise the new PCI value is output as the recommended PCI value of the newly created cell.
  • the device further includes:
  • the prompting module is used to prompt the OMC to create a new cell PCI to cause interference in the neighboring reference information.
  • Figure 1 is a possible distribution diagram of the cell reference signal 6
  • FIG. 2 is a flowchart of processing of an intra-frequency neighboring cell in an eNB according to the present invention
  • 3 is a flowchart of processing in which the same frequency neighboring cell is not in the same eNB;
  • FIG. 4 is a schematic structural view of a PCI distribution device according to the present invention.
  • FIG. 5 is a schematic structural view of another PCI distribution device according to the present invention. detailed description
  • the basic idea of the present invention is to determine whether the PCI of the newly built cell and the PCI of the same-frequency neighboring cell satisfy the congruence relationship ⁇ ⁇ ⁇ ⁇ 0 (1 6 , if satisfied, it is proved that the frequency domain positions of the downlink cell reference signals of the two cells are the same, If the interference of the reference signals between the two cells is caused, the new PCI value is re-allocated to the cell, so that mutual interference of the cell reference signals due to improper allocation of the PCI can be prevented.
  • FIG. 2 shows the processing of two co-frequency cells in the same eNB. As shown in Figure 2, the following steps are included:
  • Step 201 Establish a new cell in an eNB, and allocate a PCI to it, which may be automatically allocated or manually allocated.
  • Step 202 Determine whether there is a co-frequency neighboring cell in the same eNB. If yes, perform step 203; otherwise, end the process;
  • Step 203 Check the PCI of the same-frequency temporary area one by one through the neighbor relationship, and determine whether the PCI of the new cell and the PCI of the neighboring cell satisfy the congruence relationship. Mod 6 , if it is satisfied, it is proved that the allocated PCI causes interference of the intra-frequency neighbor cell reference signal, and then step 204 is performed; otherwise, the process ends.
  • Step butterfly 204 The eNB prompts the Operation Maintainance Centre (OMC), and the allocation of the PCI causes interference of the reference signal of the same-frequency neighboring cell, and gives a suggested PCI value to the OMC.
  • OMC Operation Maintainance Centre
  • Figure 3 shows the processing of two co-frequency cells not in the same eNB. As shown in Figure 3, the following steps are included:
  • Step 301 Establish an X2 interface between two eNBs.
  • Step 302 Create a new cell in an eNB (ie, the source eNB) and allocate a PCI to it.
  • Step 303 The source eNB informs the peer eNB of the PCI of the newly established cell through the X2 port.
  • Step 304 The peer eNB checks whether the PCI of the new cell in the source eNB causes the same frequency.
  • Mutual interference of cell reference signals ie, the source eNB
  • step 307 it is determined whether the PCI of the new cell of the source eNB and the PCI of the neighboring cell of the opposite eNB satisfy the congruence relationship w ⁇ L m . d 6 to determine whether it will cause mutual interference of the same-frequency cell reference signals. If it is satisfied, it will prove that the mutual-frequency cell reference signals interfere with each other, and then proceed to step 305; otherwise, step 307 is performed.
  • Step 305 The peer eNB informs the source eNB through the X2 interface signaling that the PCI may cause mutual interference of the same-frequency cell reference signals.
  • Step 306 The source eNB learns that the PCI may cause interference between adjacent reference signals of the same frequency cell, prompting the OMC: the allocation of the PCI may cause the reference signal of the same frequency neighboring area to be interfered, and the recommended PCI value is given. To the OMC, the process ends.
  • Step 307 The peer eNB informs the source eNB that the PCI does not cause mutual interference of the same-frequency cell reference signals through the X2 interface signaling, and the source eNB notifies the OMC that the allocation is successful.
  • Step E101 Create a new cell in an eNB and assign PCI to the new cell: Set to W, either manually or automatically.
  • Step E102 traversing the neighboring cell relationship of the newly-created cell, if there is an intra-frequency neighboring cell in the local eNB of the cell, performing step E103; if only cells in other eNBs are in the same-frequency neighboring cell, step E106 is performed;
  • the eNB refers to an eNB where a new cell is located.
  • Step E 103 traverse the PCI of all the same-frequency neighboring cells, and set the PCI of the same-frequency neighboring area to calculate whether the PCI value of the newly-created cell and the PCI value of the same-frequency neighboring area satisfy the congruence relationship, that is, m. d 6 , if yes, step E104 is performed; if not, step E106 is performed; step E104: adding a new PCI value ⁇ ' on the basis of the original PCI value, specifically: calculating mod 6 ;
  • Step E105 traversing the PCI of the intra-frequency neighboring cell in the eNB to which the new cell belongs, and checking whether the relationship with the newly obtained 'satisfying congruence relationship is satisfied. If yes, step E104 is performed again; if not, the newly obtained W is newly created.
  • Step E106 Determine whether the newly created cell has an intra-frequency neighboring cell in another eNB, and there is an X2 port between the two eNBs;
  • step E107 it may be determined by the information about the X2 port saved by the eNB; if yes, step E107 is performed; otherwise, the process ends.
  • Step E107 If ⁇ ' is not empty, the PCI of the newly added cell is set to be, and the source e NB brings the message of the cell addition to the opposite eNB through the X2 port configuration update (X2 CONFIGURATION UPDATE) signaling. Reading neighbor eNB W X2 CONFIGURATION UPDATE signaling is carried in cells, are calculated for all cells in the PCI e NB: N ⁇ ;
  • Step E108 The peer eNB determines whether the PCI brought by the PCI and the source end of all cells in the eNB satisfies the congruence relationship ⁇ i ⁇ N ⁇ mod 6 ;
  • Step E109 After the source eNB receives the X2 CONFIGURATION ACK signaling, if there is a cached W li', the protocol between the OMC and the base station prompts the OMC, and the previously allocated PCI value W causes the adjacent co-frequency cell reference signal. Interference between and give the suggested PCI value
  • Application example 2
  • the embodiment of the present invention further provides a device for assigning a physical cell ID. Since the principle of solving the problem is similar to the method for assigning a physical cell ID, the implementation of the device can be implemented by referring to the method. It will not be repeated here.
  • FIG. 4 is a schematic structural diagram of a PCI distribution device according to the present invention, the device includes:
  • the judging module is configured to determine whether the PCI value w of the newly built cell and the PCI value of the co-frequency neighboring area satisfy the congruence relationship W ⁇ W mod6 .
  • a redistribution module configured to re-allocate a new PCI to the newly created cell when the PCI value of the newly created cell satisfies the congruence relationship.
  • the device further includes: a prompting module, configured to prompt the OMC to create a cell of the cell to cause interference of the reference information of the area.
  • a prompting module configured to prompt the OMC to create a cell of the cell to cause interference of the reference information of the area.
  • FIG. 5 is a schematic structural diagram of a PCI allocating apparatus according to another embodiment of the present invention, where the new cell is not in the same eNB as the same-frequency neighboring cell, and the difference from FIG. 4 is that the device further includes:
  • the notification module is configured to notify the eNB of the new cell to the peer eNB, where the PCI may be a PCI value that is determined by the determining module to not satisfy the congruence relationship, or may be a recommended PCI given by the redistribution module. Value
  • the second determining module is located at the peer eNB, and is configured to determine whether the PCI of the new cell and the PCI of the same-frequency neighboring cell of the opposite eNB satisfy the congruence relationship W ⁇ W mod 6 .
  • a response module configured to send, by the peer eNB, a determination result of the second determining module to the redistribution module, and if the congruence relationship is satisfied, indicate, by using a signaling message, the PCI of the newly added cell by the redistribution module It will cause interference with the reference signal of the same-frequency neighboring cell in the opposite end; otherwise
  • the signaling message indicates that the PCI of the newly established cell of the redistribution module does not cause interference with the reference signal of the peer-to-peer neighboring cell;
  • the redistribution module is further configured to re-allocate the new cell to the new cell when it learns that the PCI of the new cell causes interference between neighboring intra-frequency cell reference signals of other eNBs.
  • the evaluation module outputs a new PCI value ⁇ ', it traverses the PCI of the intra-frequency neighboring cell in the eNB of the newly-created cell, and checks whether the congruence relationship is satisfied with the new PCI value. If yes, the evaluation module is notified, and the process is notified. Go to the evaluation module to perform the accumulation operation again; otherwise, the new PCI value is output as the recommended PCI value of the new ⁇ area.
  • the device further includes: a prompting module, configured to prompt the OMC to create a cell of the cell to cause interference of the reference information of the area.
  • a prompting module configured to prompt the OMC to create a cell of the cell to cause interference of the reference information of the area.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un dispositif permettant d'allouer une Identification de Cellule Physique (PCI, Physical Cell Identification), le procédé consistant à faire en sorte que lorsque des relations de congruence suivantes sont respectées, une nouvelle PCI est réallouée à un nouvel appel, laquelle valeur PCI est celle de la nouvelle cellule, et est une valeur PCI d'une cellule adjacente ayant la même fréquence que la nouvelle cellule. Le procédé et le dispositif de la présente invention permettent de faire en sorte que lorsqu'il se produit un brouillage mutuel entre des signaux de référence de cellules adjacentes ayant les mêmes fréquences, ce brouillage peut être compensé efficacement, le brouillage mutuel étant provoqué par une allocation erronée de l'identification PCI de cellule.
PCT/CN2010/076884 2010-03-02 2010-09-14 Procédé et dispositif permettant d'allouer une identification de cellule physique WO2011106969A1 (fr)

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CN201010117374.3 2010-03-02
CN2010101173743A CN102196442A (zh) 2010-03-02 2010-03-02 一种物理小区id分配的方法及装置

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CN102740300B (zh) * 2012-06-29 2019-02-26 中兴通讯股份有限公司 物理层小区标识的自动分配方法及装置
CN103716821B (zh) * 2012-09-29 2019-03-15 中兴通讯股份有限公司 X2连接故障处理方法、信息发送接收方法、装置、系统
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