WO2010075695A1

WO2010075695A1 - Method and device for performing to automatically configure physical cell identity

Info

Publication number: WO2010075695A1
Application number: PCT/CN2009/073480
Authority: WO
Inventors: 樊伟毅
Original assignee: 中兴通讯股份有限公司
Priority date: 2008-12-31
Filing date: 2009-08-25
Publication date: 2010-07-08
Also published as: CN101772036A; CN101772036B

Abstract

A method and device for performing to automatically configure Physical Cell Identity (PhyCellId) are disclosed in the present invention. In E-UTRAN system, PhyCellIds whose total number is N are orderly divided into a first group and a second group by a network management system; an eNodeB obtains the grouping information of PhyCellId from the network management system, and dispersedly selects one or more continuous PhyCellIds to be configured and used from the first group PhyCellIds according to the holistic number of the eNodeB; when detecting that there is possible collision between the PhyCellIds source used by local cell and the PhyCellIds source used by adjacent cells, the eNodeB selects one or continuous more PhyCellIds source to replace the PhyCellIds source which has collision with the PhyCellIds source of the adjacent cells from the second group PhyCellIds which are not used. It is possible to avoid that the source collision of the PhyCellIds occurs between the adjacent cells by means of the method and device disclosed in the present invention.

Description

Method and device for realizing automatic configuration of physical cell identification

Technical field

The present invention relates to a self-configuration and self-optimization technology of a mobile communication system, and particularly relates to a self-configuration method for developing an E-UTRAN (Evolved Universal Terrestrial Radio Access Network) system in a Long Term Evolution (LTE) project. .

Background technique

The E-UTRAN system, as shown in FIG. 1, includes a plurality of evolved Node Bs (abbreviated as eNBs or eNodeBs) connected to each other through an X2 interface; eNodeBs in the E-UTRAN system are all connected to the mobility management entity through the S1 interface. (MME, Mobility Management Entity) or Service Gateway S-GW (Serving Gateway) connection.

The E-UTRAN system supports self-configuration and self-optimization. The self-configuration function refers to the process of the network system automatically obtaining the necessary basic configuration resources before the power-on process or formal work. The self-optimization function means that the network system executes the corresponding algorithm according to the measurement result to achieve the network's own optimization.

The self-configuration function of the E-UTRAN system includes automatic configuration of a physical cell identity (PhyCellld, Physical Cell Identity). There are 504 physical cell identifiers in the E-UTRAN system (value range: 0-503). Therefore, multiple eNodeBs in the E-UTRAN system inevitably reuse a limited number of 504 physical cell identifiers, so it must be reasonable. The physical cell identifiers are configured for the eNodeBs to ensure that the physical cell identifiers of the neighboring cells are different from each other, so that the adjacent intra-frequency cells can effectively distinguish the cells when performing the scrambling operation. There is currently no description of the automatic configuration method for physical cell identity in the 3GPP protocol. Summary of the invention

The technical problem to be solved by the present invention is to provide a method and a device for realizing automatic configuration of physical cell identifiers. When a limited physical cell identifier is used in an E-UTRAN system, the physical cell identifiers of mutually adjacent cells are different.

In order to solve the above technical problem, the present invention provides an automatic configuration for realizing physical cell identity. The method is used in an E-UTRAN system, and the method includes: dividing, by the network management system, a total number N of PhyCelllds into a first group and a second group before performing physical configuration of the physical cell identifier PhyCellld; The evolved Node B (eNodeB) acquires the packet information of the PhyCellld from the network management system when performing the PhyCellld autoconfiguration, and then decentralized from the first group of PhyCellld according to the global number of the eNodeB Select one or more consecutive PhyCellld configurations to use.

Further, when the eNodeB detects that a PhyCellld used by one cell has a resource conflict with a PhyCellld used by the neighboring cell, the eNodeB selects one or more consecutive PhyCellld replacements from the second group of unused PhyCelllds. PhyCellId that conflicts with a neighboring cell.

Further, when the eNodeB finds that the PhyCellld resource used by the cell is insufficient, the eNodeB selects one or more consecutive PhyCellld from the second group of unused PhyCellld for resource supplementation.

Further, the step of dividing the PhyCellld whose total number is N into the first group and the second group by the network management system includes:

Allocating A PhyCelllds in the first group; allocating (N-A) the PhyCelllds in the second group;

The first group of PhyCelllds are sequentially divided into M groups, wherein each group assigns the number of PhyCellld to G=A/M, and each group is numbered 0, 1, 2, 3..... M-1; and, the second group of PhyCellld is sequentially divided into (0+P+Q+R+S+T+ .....) groups, wherein the number of PhyCellld assigned to each group is o, p, q, r, s, t ...... and satisfy the following constraints: o*0+p*P+q*Q+r*R+s*S+t*T ... .. =NA.

Further, in the step of performing the automatic configuration of the PhyCellld, the total number of eNodeBs is L, and each eNodeB is configured from the first group of 0 according to the grouping information of the acquired PhyCellld when the PhyCellld is automatically configured for power-on. 1 , 2 , 3... The M- 1 group selects a d, group PhyCellld configuration to use, wherein the selected group group number is obtained by modulo the global number of the eNodeB to the M.

Further, the eNodeB detects a resource conflict between the PhyCellld used by the cell and the PhyCellld used by the neighboring cell, that is, detects the PhyCellld group used by the cell. The same as the PhyCellld group used by the neighboring cell, a group of PhyCellld is selected from the second group to replace the same PhyCellld group as the adjacent eNodeB.

Further, the eNodeB selects a group of PhyCellld insufficient PhyCellld groups from the second group when it is found that the PhyCellld resources used by the cell are insufficient.

In order to solve the above technical problem, the present invention provides an apparatus for implementing automatic configuration of a physical cell identifier, including a resource grouping information acquiring module and a resource configuration module;

The resource grouping information acquiring module is configured to: obtain, after the physical cell identifier PhyCellld is automatically configured, the group information of the PhyCellld from the network management system, and output the group information of the PhyCellld to the resource configuration module; the group information of the PhyCellld At least including dividing the total number N of PhyCellld into the first group and the second group;

The resource configuration module is configured to select one or more consecutive PhyCellld configurations from the first group of PhyCellld according to the global number of the eNodeB when the eNodeB powers on the PhyCellld auto configuration.

Further, the group information of the PhyCellld further includes:

The number of the PhyCellld in the first group is A; the number of the PhyCellld in the second group is (N-A);

The number of groups in which the first group of PhyCelllds are sequentially assigned is M, and the number of PhyCellld in each group is G=A/M, and the number of the group is 0, 1, 2, 3..... M -1 ; and,

The number of groups in which the second group of PhyCelllds are sequentially assigned is (0+P+Q+R+S+T+ .....), and the number of PhyCellld in each group is o, p, q, respectively. r, s, t ...... , and satisfy the following constraints: o * 0 + p * P + q * Q + r * R + s * S + t * T ..... = NA.

Further, the resource configuration module is further configured to use one or more consecutive PhyCellld configurations from the first group of PhyCellld, that is, from the first group of 0, 1, 2, 3.... The M-1 group selects a group PhyCellld to use, and the selected group group number is obtained by modulo the M of the eNodeB's global number GlobaleNodeBID.

Further, the apparatus further includes a resource adjustment module, which is respectively connected to the resource grouping information acquiring module and the resource configuration module, and configured to detect the PhyCellld group used by one cell and the PhyCellld group used by the neighboring cell. Simultaneously, by the resource grouping The information obtaining module selects a group PhyCellld from the second group, and instructs the resource configuration module to replace the used PhyCellld group with the neighboring cell by using the selected group PhyCellld;

Or the resource adjustment module is configured to: when the PhyCellld resource that is used by the cell is insufficient, the resource group information acquiring module selects a group of PhyCellld from the second group, and indicates that the resource configuration module is insufficiently supplemented. PhyCellld team.

Further, the resource configuration module is further configured to perform replacement or supplementation of the PhyCellld resource on the cell according to the indication of the resource adjustment module.

BRIEF abstract

Figure 1 is a topographical diagram of the E-UTRAN network of the LTE project mobile communication system;

2 is an eNodeB connection diagram in an E-UTRAN network;

3 is a schematic diagram of an initial configuration of a physical cell identity group of an eNodeB of an E-UTRAN system according to the present invention;

4 is a diagram showing a supplementary configuration of a physical cell identity group when the resources of the E-UTRAN system eNodeB are insufficient;

5 is a schematic diagram of adjusting a physical cell identity group after detecting that the neighboring resource group of the E-UTRAN system is the same;

FIG. 6 is a structural block diagram of an embodiment of an apparatus for automatically configuring a physical cell identifier according to the present invention.

Preferred embodiment of the invention

The core point of the method for realizing the automatic configuration of the physical cell identifier provided by the present invention is that the PhyCellld is sequentially divided into two groups by the network management system before the automatic configuration of the physical cell identifier PhyCellld of the total number N, and the first group is PhyCellld. The number of PhyCellld in the second group is (NA); each eNodeB of the system randomly selects one or a plurality of PhyCellld configurations from the first group of PhyCelllds when performing PhyCellld autoconfiguration; The eNodeB detects that the PhyCellld resource used in this area and the PhyCellld resource used in the neighboring area may be rushed. When the eNodeB finds that the PhyCellld resource used by the cell is insufficient, the eNodeB does not use the PhyCellld resource that is in use in the second group. In the PhyCellld, one or more consecutive PhyCellld resources are selected to supplement the insufficient PhyCellld resources of the cell.

The above technical solutions of the present invention will be explained and explained in more detail below with reference to the accompanying drawings and specific embodiments.

The E-UTRA system eNodeB group connection is shown in Figure 2, where the eNode's global number GlobaleNodeBID is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, respectively. 15, 16.

The method for realizing physical cell identifier automatic configuration provided by the present invention, the total number of pairs of systems is N

(N=504) physical cell identifier Before PhyCellld performs automatic configuration, firstly, N PhyCelllds are grouped through the network management system:

The PhyCellld is divided into two groups in order. The number of PhyCellld in the first group is A, and the number of PhyCellld in the second group is 504-A.

The first large group is further divided into M groups. The number of PhyCellld in each group is G=A/M, and each group is numbered 0, 1, 2, 3..... M-1, the first A large group is used when the system performs PhyCellld initial self-configuration.

The second largest group is further divided into 0+P+Q+R+S+T+ ..... groups, and the number of PhyCellld resources in each group is o, p, q, r, s, t. ..... , and the following constraints are met: o*0+p*P+q*Q+r*R+s*S+t*T ..... =504-A, o<p<q <r<s<t ..... , 0>P>Q>R>

S > T ......, the second largest group is used when the system has a neighboring PhyCellld resource conflict or insufficient resources.

When the PhyCellld resource self-configuration is performed on the eNodeB, select a group of PhyCellld from the 0, 1, 2, 3... M-1 group, and select the group group number by using the GlobaleNodeBID pair.

M is obtained by modulo.

The PhyCellld resource group group number used by the eNodeB is the same as the PhyCellld resource group group number used by the adjacent eNodeB, that is, the used PhyCellld resources may collide, and a group of PhyCellld resource replacements are reselected from the second largest group. The same PhyCellld resource group as the adjacent eNodeB. Alternatively, if the eNodeB finds that the PhyCellld group resources used in the area are insufficient, then select a suitable number of PhyCellld resources for supplementation in the second largest group.

In order to further understand the above method of the present invention, an application example is exemplified below.

For example, PhyCellld is divided into two groups in sequence through the network management system. The first group of PhyCellld is 360, and the second largest group is PhyCellld = 504-360=144.

The first major component is 6 groups, each group has a PhyCellld number of 360/6=60, and each group is numbered 0, 1, 2, 3, 4, 5.

The second largest component is 4+2 groups, and the group numbers are 6, 7, 8, 9, 10, 11 respectively; among them, the number of PhyCellld resources of groups 6, 7, 8, and 9 is 6, 10, 11 The number of groups is 60, and the following constraints are met: 6*4+60*2=144.

Each eNodeB is powered on to obtain PhyCellld group information from the network management system, that is, the system's PhyCellld is divided into 0, 1, 2, 3, 4, and 5 groups; when performing PhyCellld initial self-configuration, from 0, 1, 2, 3, 4 In the 5 groups, a group of PhyCellld is selected, and the group number is obtained by GlobaleNodeBID, as shown in FIG.

In fact, the first group of PhyCellld resources are equally divided into M groups, so that the PhyCellld resources are evenly distributed to each eNodeB, but in fact, the PhyCellld resources of the M group may not be equal, for example, the eNodeB with the GlobaleNodeBID of 1 selects the first one~ 20 PhyCellld, GlobaleNodeBID 2 eNodeB selects 21~30 PhyCellld, .... In addition, the first large group of PhyCellld resources may not be sub-group, and the eNodeB directly selects any PhyCellld resource from the first large group as the initial allocation, and then proceeds from the second largest according to different allocation algorithms and conflict resolution methods. The group selects the PhyCellld resource for replacement; or continues to use the initially allocated PhyCellld resource without conflict, and finally does not need to select the PhyCellld resource for replacement from the second largest group.

When the PhyCellld self-configuration is performed, the eNodeB 7 finds that the used group 1 PhyCellld resources are insufficient. In the 6, 7, 8, 9, 10, and 11 groups, select the appropriate number of groups. 6 PhyCellld resources are used, as shown in Figure 4.

Alternatively, when the eNodeB 10 detects that the neighboring eNodeB 4 uses the PhyCellld group number 4, or the eNodeB 11 detects that the neighboring eNodeB 4 uses the PhyCellld group number 5, as shown in FIG. Then eNodeB 10 re-selects a group of PhyCellld with group number 10 from 6, 7, 8, 9, 10, 11 groups, or eNodeB 11 re-relies from groups 6, 7, 8, 9, 10, 11 Select a group of PhyCellld with group number 11 as shown in Figure 5.

Note: The method for the eNodeB to detect whether the neighboring eNodeB physical cell identity resource groups are the same is not related to the present invention, and therefore will not be described in detail herein.

The present invention is directed to the foregoing method, and is also applied to a corresponding physical entity identifier automatic configuration device in an evolved Node B (eNodeB). As shown in FIG. 6, an embodiment 600 of the device includes: a resource group information acquiring module 610, a resource configuration module 620 and a resource adjustment module 630; wherein:

The resource grouping information obtaining module 610 is configured to perform physical cell identification on the eNodeB.

Before the PhyCellld is automatically configured, the packet information of the PhyCellld is obtained by the network management system, and the packet information of the PhyCellld is output to the resource configuration module 620 and the resource adjustment module 630 respectively. The group information of the PhyCellld includes at least the total number N of PhyCellld. For the first group and the second group;

The group information of PhyCellld also includes:

The number of PhyCellld in the first group is A; the number of PhyCellld in the second group is (N-A);

The first group of PhyCelllds were sequentially divided into M groups. The number of PhyCellld in each group was G=A/M, and each group was numbered 0, 1 , 2, 3..... M-1;

The second group of PhyCellld is divided into ( 0+P+Q+R+S+T+ .....) groups, and the number of each group of PhyCellld resources is o, p, q, r, s. , t ...... , and satisfy the following constraints: o*0+p*P+q*Q+r*R+s*S+t*T ..... =NA.

The resource configuration module 620 is configured to decentralize one or more consecutive PhyCellld configurations from the first group of PhyCelllds when the eNodeB powers up the PhyCellld autoconfiguration.

The resource adjustment module 630 is set to detect the PhyCellld used in the area and the neighboring area.

When a resource conflict occurs, PhyCellld selects another group from the second group of unused PhyCelllds and instructs the resource configuration module 620 to replace the PhyCellld group that conflicts with the neighboring cell; or, when it is found that the PhyCellld resources used in the area are insufficient, Select another PhyCellld group from the second group. And instructing the resource configuration module 620 to perform resource supplementation.

In summary, the method and the device provided by the present invention ensure that physical resource identification resources of mutually adjacent cells do not conflict, and that the physical resource identification resources used by the local cell are insufficiently supplemented in time.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. That is, equivalent changes and modifications made by the content of the patent application scope of the present invention should be the technical scope of the present invention.

Industrial Applicability The present invention provides a method and an apparatus for automatically configuring physical cell identifiers, which ensure that physical cell identifiers of mutually adjacent cells are different, and it is possible to avoid resource conflicts between physical cell identifiers of neighboring cells. Timely supplementation of insufficient physical cell identification resources used in the district.

Claims

Claim

A method for implementing automatic configuration of a physical cell identity, in a system for a universal terrestrial radio access network E-UTRAN, the method comprising:

Perform physical cell identification Before PhyCellld is automatically configured, the total number N of PhyCelllds are sequentially divided into the first group and the second group by the network management system;

The evolved Node B (eNodeB) in the system acquires the packet information of the PhyCellld from the network management system when performing the PhyCellld autoconfiguration, and then decentralizes from the first according to the global number of the eNodeB. One or more consecutive PhyCellld configurations are selected for use in the group's PhyCellld.

2. The method according to claim 1, further comprising: the eNodeB reselecting from the second group of unused PhyCelllds when detecting that a PhyCellld used by one cell has a resource conflict with a PhyCellld used by a neighboring cell. A PhyCellId that is used by one or more consecutive PhyCellld replacements that will collide with neighboring cells.

3. The method according to claim 1, further comprising: when the PhyCellld resource used by the cell is found to be insufficient, the eNodeB selects one or more consecutive PhyCellld from the second group of unused PhyCellld. Resource supplement.

The method according to any one of claims 1 to 3, wherein the step of dividing the total number N of PhyCellld into the first group and the second group by the network management system comprises:

Allocating A of the PhyCelllds in the first group; allocating (N-A) the PhyCelllds in the second group;

The PhyCellld of the first group is sequentially divided into M groups, wherein each group assigns the number of the PhyCellld to G=A/M, and each group is numbered 0, 1, 2, 3 ..... M-1 ; and,

The PhyCellld of the second group is sequentially divided into (0+P+Q+R+S+T+ .....) groups, wherein the number of the PhyCellld assigned to each group is o, respectively. p,q,r,s,t ...... , and satisfy the following constraints: o*0+p*P+q*Q+r*R+s*S+t*T ..... =NA.

5. The method according to claim 4, wherein in the step of performing the PhyCellld automatic configuration, the total number of eNodeBs is L, and each eNodeB is powered on to perform the PhyCellld automatic During configuration, according to the obtained grouping information of the PhyCellld, a group of PhyCellld configurations are selected from the first group of 0, 1, 2, 3... M-1 groups, wherein the selected group is selected. The group number is obtained by modulo the M of the global number of the eNodeB.

The method according to claim 5, when the claim 4 refers to claim 1 or 3, the method further includes: the eNodeB detects that the PhyCellld used by the cell and the PhyCellld used by the neighboring cell generate resources. The conflict, that is, when the PhyCellld group used by the cell is detected to be the same as the PhyCellld group used by the neighboring cell, a group PhyCellld is selected from the second group to replace the same PhyCellld group as the neighboring eNodeB.

The method according to claim 5, when the claim 4 refers to claim 1 or 2, the method further includes: when the eNodeB discovers that the PhyCellld resource used by the cell is insufficient, from the second The group selected a group of PhyCellld supplemented with insufficient PhyCellld groups.

8. An apparatus for implementing automatic configuration of a physical cell identifier, the apparatus comprising a resource grouping information acquiring module and a resource configuration module; wherein:

9. The apparatus according to claim 8, wherein the group information of the PhyCellld further comprises:

The number of groups in which the PhyCellld of the first group is sequentially assigned is M, in each group

The number of PhyCellld is G=A/M, and the numbers of the group are 0, 1 , 2, 3..... M-1 ; and

The number of groups in which the PhyCellld of the second group is sequentially allocated is ( 0+P+Q+R+S+T+ ..... ) , the number of PhyCellld in each group is o, p, q, r, s, t ..., and meets the following Constraint: o*0+p*P+q*Q+r*R+s*S+t*T ..... =NA.

10. The apparatus according to claim 9, wherein the resource configuration module is further configured to discretely select one or more consecutive PhyCellld configurations from the PhyCellld of the first group, ie, from the A group of 0, 1, 2, 3... M-1 groups selected a group of PhyCellld M modulo.

11. Apparatus according to claim 10, said apparatus further comprising:

a resource adjustment module, which is respectively connected to the resource grouping information acquiring module and the resource configuration module, and configured to pass the resource grouping information when detecting that the PhyCellld group used by one cell is the same as the PhyCellld group used by the neighboring cell The obtaining module selects a group PhyCellld from the second group, and instructs the resource configuration module to replace the used PhyCellld group with the neighboring cell by using the selected group PhyCellld;

12. The apparatus according to claim 11, wherein the resource configuration module is further configured to perform replacement or supplementation of the PhyCellld resource to the cell according to the indication of the resource adjustment module.