WO2013037214A1

WO2013037214A1 - Method and system for managing neighbor cell information

Info

Publication number: WO2013037214A1
Application number: PCT/CN2012/075403
Authority: WO
Inventors: 闫红超; 孙连翘; 贺美芳
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-09-14
Filing date: 2012-05-11
Publication date: 2013-03-21
Also published as: CN103002523A

Abstract

Disclosed in the present invention is a method for managing neighbor cell information. A User Equipment (UE) is resident into an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) cell according to the cell reselecting, and confirms that the former resident cell is not in a neighbor cell list of the current resident cell, then reports the current resident cell information to an Evolved Node B (ENB). The ENB adds the absent neighbor cell information into the neighbor cell list of the current resident cell. A system for managing neighbor cell information is also disclosed in the present invention, application of the method and system for managing can add the absent neighbor cell information in time, reduce the labor of UE detecting neighbor cell and reporting, improve the capability of network side acquiring neighbor cell high layer information, further improve the capability of the system anti-dropping a call and the capability of the system maintaining call continuity of the device.

Description

Neighborhood area information management method and system

The present invention relates to the field of cell information management for wireless communication, and in particular to a method and system for managing neighbor information. Background technique

A basic function of the cellular mobile communication system is to ensure the continuity of service of the mobile subscriber, and the handover of the user equipment (UE, User Equipment) is the main means to ensure service continuity. In order to ensure that the UE at the cell service boundary can switch to the neighbor with the best signal quality in time, the system needs to configure the adjacency relationship for each cell, so that the wireless network can notify the UE of the neighbor information of the serving cell. The UE reports the measurement result to the neighboring cell, and the wireless network side instructs the UE to switch to a neighboring cell, where the neighboring cell refers to the neighboring cell with the best signal quality in the measured result. Area.

A correct and complete neighbor relationship is very important. The mismatch of the neighbor relationship may cause the UE to fail to switch to other cells in time, so that the load of the cell is too high, the signal quality of the cell is deteriorated, the interference is serious, or the user is dropped. If the situation is too much, the accuracy of the UE measurement will be reduced. In addition, which cells are around a certain cell are related to the distance between cells, and are also closely related to the wireless environment in which the cell is located. Due to the intricacies of the wireless environment, especially in the dense urban environment of high-rise buildings, it is difficult to determine exactly which neighboring cells should be configured in a certain cell at the beginning of network planning, and some new cells, or cell property changes, such as in cellular mobile communication systems. The neighbor relationship of the cell is not updated in time; or, the change of the environment, the omission of the network planner, etc., will cause the information of the neighboring area to be updated in time.

In order to correctly and completely configure the adjacency relationship of the cell, an automatic neighbor relationship (ANR, Automatic Neighbor) is proposed in the Long Term Evolution (LTE) system. The Relation ) function maintains a list of neighbors. When the ANR function adds the neighbor relationship, the evolved Node B (ENB, Evolved Node B) detects the new neighboring cell by the measurement report message reported by the UE, and requests the UE to re-detect through the RRC connection reconfiguration message. The other information of the neighboring area is used to enable the UE to detect and report the information of the neighboring area, and the ENB adds the new neighboring area to the neighboring area list according to the information.

In the prior art, the ANR function uses the UE in the RRC (Radio Resource Control) connection state to perform the detection of the new neighboring cell and the reporting of the neighboring cell information, and the implementation of the ANR function is covered by the RRC connected state. The number of UEs at the edge of the range, the capabilities of the UE (such as the UE to support the long DRX period or the related ANR measurement), and other processes may affect the UE to detect or report the neighbor information of the new neighbor. As a result, existing technologies sometimes fail to discover and add new neighbor information in time. Summary of the invention

In view of this, the main purpose of the present invention is to provide a method and system for managing neighbor information, so that the UE can discover and report new neighbor information, and timely increase the missing neighbor relationship, thereby improving the network side neighboring area. The ability to learn information.

In order to solve the above problems, the present invention provides a method for managing neighbor information, and the method includes:

The UE camps on the evolved Evolved Universal Terrestrial Radio Access Network (E-UTRAN) cell, and determines that the previously camped cell is not in the neighbor list of the currently camped cell, and reports the previously camped cell. Information to the ENB;

The ENB adds the missing neighbor information to the neighbor list of the cell in which the UE currently camps.

In the method, the UE camping on the E-UTRAN cell includes: the UE reselects from one type of cell to the E-UTRAN cell by cell reselection, and camps on the E-UTRAN cell.

In the method, the one type of cell is: other E-UTRAN cell, terrestrial radio access network UTRAN cell, global mobile communication system GSM cell or code division multiple access CDMA small Area.

In the method, before the determining that the previously camped cell is not in the neighboring cell list of the current camping cell, the method further includes: the ENB notifying the UE of the neighboring cell information of the currently camped cell of the UE, and reporting the neighboring cell information The instructions inform the UE.

In the method, the determining that the previously camped cell is not in the neighbor cell list of the current camping cell includes: determining, by the UE, whether the neighbor cell information of the current camping cell from the ENB includes the information of the previously camped cell, If not, it is determined that the previously camped cell is not in the neighbor list of the currently camped cell.

The invention also provides a management system for cell neighborhood information, the system comprising:

The UE is configured to camp on the E-UTRAN cell, determine that the previously camped cell is not in the neighbor cell list of the current camping cell, and report the information of the previously camped cell to the ENB;

The ENB is used to add the missing neighbor information to the neighbor list of the cell in which the UE currently camps. In the system, the UE is used to camp on an E-UTRAN cell, and includes:

The UE is for reselecting from one type of cell to the E-UTRAN cell by cell reselection and camping on the E-UTRAN cell.

In the system, the one type of cell is: another type of cell such as an E-UTRAN cell, a UTRAN cell, a GSM cell, or a CDMA cell.

In the system, the ENB is further configured to: notify the UE of the neighboring cell information of the currently camped cell of the UE, and notify the UE of the indication of reporting the neighboring cell information.

In the system, the determining, by the UE, that the previously camped cell is not in the neighboring cell list of the current camping cell includes: determining, by the UE, whether the neighboring cell information of the currently camped cell from the ENB includes the previously camped The information of the cell, if not included, determines that the previously camped cell is not in the neighbor list of the currently camped cell.

Compared with the prior art, the present invention performs cell reselection by the UE to camp on the E-UTRAN cell, and determines that the previously camped cell is not in the neighbor cell list of the currently camped cell, so as to discover new in time. The neighboring area information, and then report the neighboring area information of the new neighboring area to the ENB, so that the ENB can increase the missing neighboring area information in time. DRAWINGS

FIG. 1 is a flowchart of a method for managing cell neighborhood information in an embodiment. detailed description

The basic idea of the present invention is: the UE camps on the E-UTRAN cell, determines that the previously camped cell is not in the neighbor cell list of the currently camped cell, reports the information of the previously camped cell to the ENB, and the ENB will be the missing neighbor cell. The information is added to the neighbor list of the cell in which the UE currently camps.

The specific implementation method of the present invention is as shown in FIG. 1 and includes the following steps:

Step 101: The UE reselects from a certain type of cell to an E-UTRAN cell by cell reselection, and camps on the E-UTRAN cell;

Among them, a certain type of cell includes: other E-UTRAN cell, UTRAN, UMTS Terrestrial Radio Access Network (UMTS, Universal Mobile Telecommunications System) cell, global mobile communication system (GSM) , Global System For Mobile Communications) cell, and code division multiple access (CDMA, Code Division Multiple Access) cell type cell;

Further, other E-UTRAN cells may be co-frequency or inter-frequency neighbors of the current E-UTRAN cell.

Step 102: The ENB sends a downlink air interface signaling message to notify the UE of the neighboring cell information of the currently camped cell of the UE.

The downlink air interface signaling message may be a system information message or other downlink air interface signaling message.

Step 103: The ENB sends a downlink air interface signaling message to notify the UE of the indication of the neighboring area information, to trigger the UE to determine whether the previously camped cell is in the neighboring cell list of the currently camped cell. The indication of the uplink information may be notified to the UE by adding an indication cell to the system information message or other downlink air interface signaling message.

The ENB may perform step 102 and step 103 at the same time, and send the neighboring cell information of the cell and the indication of reporting the neighboring cell information to the UE, or perform step 102 and step 103 respectively to set the neighboring cell information of the cell and the upper 4 neighboring cell. The indication of the information is sent separately, informing the UE that the execution of steps 102 and 103 has no apparent chronological order.

Step 104: The UE determines that the previously camped cell is not in the neighbor cell list of the current camping cell, and reports the high-layer cell information and the physical layer cell parameter of the previously camped cell to the ENB through the uplink air interface signaling message;

The method for the UE to determine that the previously camped cell is not in the neighbor cell list of the currently camped cell includes:

Determining whether the neighboring cell information of the currently camped cell from the ENB includes information of the previously camped cell, and if not, determining that the previously camped cell is not in the neighbor cell list of the currently camped cell;

The uplink air interface signaling message may be a radio resource control connection request message, or an uplink information transmission message, or other uplink message;

The high-layer cell information and the physical layer cell parameters of the previously camped cell are determined by the type of the previously camped cell, that is, the content of the high-layer cell information of the different types of cells and the parameters of the physical layer cell are different.

Step 105: The ENB receives and decodes the uplink air interface signaling message, obtains missing neighbor information, and adds the missing neighbor information to the neighbor list of the currently camped cell of the UE, and updates the neighbor of the current camped cell. information.

In order to achieve the method involved in the above, the present invention also provides a system. As shown in FIG. 1, the system includes:

UE, used to camp on the E-UTRAN cell, determining that the previously camped cell is not currently camping In the neighbor list of the cell, the information of the previously camped cell is reported by the uplink air interface signaling message.

ENB;

The ENB is used to add the missing neighbor information to the neighbor list of the cell in which the UE currently camps. The UE is configured to camp on the E-UTRAN cell, and includes: the UE is used to reselect from one type of cell to the E-UTRAN cell by cell reselection, and camps on the E-UTRAN cell.

The ENB is further configured to: notify the UE of the neighboring cell information of the currently camped cell of the UE, and notify the UE of the indication of reporting the neighboring cell information.

The determining, by the UE, that the previously camped cell is not in the neighboring cell list of the currently camped cell, includes: determining, by the UE, whether the neighboring cell information of the currently camped cell from the ENB includes the information of the previously camped cell, if If not, it is determined that the previously camped cell is not in the neighbor list of the currently camped cell.

The ENB is specifically configured to send the downlink air interface signaling message to notify the UE of the neighboring cell information of the currently camped cell of the UE and the indication for reporting the neighboring cell information. The uplink air interface signaling message sent by the UE is received and decoded, and the missing neighbor is obtained. The area information adds the missing neighbor information to the neighbor list of the currently camped cell of the UE.

The UE is specifically configured to perform cell reselection from a certain type of cell to the E-UTRAN cell, and receive a downlink air interface signaling message that is sent by the ENB and carries the neighboring cell information of the current camping cell and the indication of reporting the neighboring cell information. And analyzing, by using the content of the downlink air interface signaling message, the previous camping cell is not in the neighboring cell list of the current camping cell, and the high-layer cell information and the physical layer carrying the previously camped cell are sent by using the uplink air interface signaling message. The cell parameters are given to the ENB.

The method for determining, by the UE, that the previously camped cell is not in the neighbor cell list of the current camping cell, includes: determining, by the UE, whether the neighbor cell information of the current camping cell from the ENB includes information of the previously camped cell, if If not, it is determined that the previously camped cell is not in the neighbor list of the currently camped cell.

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Example 1

The present invention is described by taking the case where the UE reselects from other E-UTRAN cells to the current E-UTRAN cell, referring to the flow shown in FIG.

Step 101 A: The UE reselects from the other E-UTRAN cell to the current E-UTEAN cell; where the other E-UTRAN cell may be the same-frequency or inter-frequency neighboring cell of the current E-UTRAN cell; Step 102 A, ENB sends the downlink The air interface signaling information informs the UE of the neighboring cell information of the currently camped cell of the UE;

Step 103A, the ENB sends a downlink air interface signaling message to notify the indication of reporting the neighboring area information.

UE;

Step 104 A, the UE determines that the previously camped cell is not in the neighbor cell list of the current camping cell, and reports the high-layer cell information and the physical layer cell parameter of the cell to the ENB through the uplink air interface signaling message;

The high-level cell information of the previously camped cell includes a Cell Global Identity (CGI), a Tracking Area Code (TAC), and a Public Land Mobile Network Identity List (PLMN list). A physical layer cell parameters previously resident cell comprises a physical cell identity (PCI, Physical Cell Identity) ₀

Step 105A: The ENB receives and decodes the uplink air interface signaling message, adds the missing neighbor information to the neighbor cell list of the current camping cell, and updates the neighbor cell information of the current camping cell.

Example 2

The present invention is described by taking the case where the UE reselects from the UTRAN cell to the current E-UTRAN cell as an example. Referring to the flow shown in FIG.

Step 101B: The UE reselects from the UTRAN cell to the current E-UTRAN cell.

The UTRAN cell can be a frequency division duplex UTRAN (UTRAN-FDD, UTRAN)

The frequency division Duplexing cell may also be a time division duplex UTRAN (UTRAN-TDD, UTRAN Time Division Duplexing) cell. Step 102 B, the ENB sends a downlink air interface signaling message to notify the neighboring cell information of the current cell.

UE;

Step 103 B: The ENB sends a downlink air interface signaling message to notify the indication of reporting the neighboring area information.

UE;

Step 104 B, the UE determines that the previously camped cell is not in the neighbor cell list of the current camping cell, and reports the high-layer cell information and the physical layer cell parameter of the cell to the ENB through the uplink air interface signaling message;

The high-level cell information of the previously camped cell includes a CGI, a Location Area Code (LAC), a Routing Area Code (RAC), and a PLMN list. A physical layer cell parameters previously resident cell comprises primary scrambling code (PSC, Primary Scrambling Code) ₀ Step 105 B, ENB to receive and decode the uplink air interface signaling message, add the missing information to the neighboring cells of the current neighbor residing In the list, the neighbor information of the currently camped cell is updated.

Example 3

The present invention will be described by taking the case where the UE reselects from the Global System for Mobile Communications (GSM) cell to the current E-UTRAN cell as an example. Referring to the flow shown in FIG.

Step 101C: The UE reselects from the GSM cell to the current E-UTRAN cell.

Step 102C, the ENB sends a downlink air interface signaling message to notify the neighboring cell information of the current cell.

UE;

Step 103C, the ENB sends a downlink air interface signaling message to notify the indication of reporting the neighboring area information.

UE;

Step 104C, the UE determines that the previously camped cell is not in the neighbor cell list of the current camping cell, and reports the high-layer cell information and the physical layer cell parameter of the cell to the ENB through the uplink air interface signaling message;

The high-level cell information of the previously camped cell includes the high-layer cell information including CGI, RAC. First Parameters of the physical layer of the front cell of the resident cell comprising a network color code (NCC, Network Colour Code) and a base station color code (BCC, Base Station Colour Code) 0

Step 105C: The ENB receives and decodes the uplink air interface signaling message, adds the missing neighbor information to the neighbor cell list of the current camping cell, and updates the neighbor cell information of the current camping cell.

Example 4

The present invention is described by taking the case where the UE reselects from the CDMA (Code Division Multiple Access) cell to the current E-UTRAN cell as an example, referring to the flow shown in FIG.

Step 101D: The UE reselects from the CDMA cell to the current E-UTRAN cell;

Step 102D: The ENB sends a downlink air interface signaling message to notify the UE of the neighboring cell information of the current cell.

Step 103D: The ENB sends a downlink air interface signaling message to notify the indication of reporting the neighboring area information.

UE;

Step 104D, the UE determines that the previously camped cell is not in the neighbor cell list of the current camping cell, and reports the high-layer cell information and the physical layer cell parameter of the cell to the ENB through the uplink air interface signaling message;

The high-level cell information of the previously camped cell includes the high-layer cell information including the CGI. The physical layer cell parameters of the previously camped cell include a pseudo code bias index (PN offset, Pseudo-Noise offset).

Step 105D: The ENB receives and decodes the uplink air interface signaling message, adds the missing neighbor information to the neighbor cell list of the current camping cell, and updates the neighbor cell information of the current camping cell.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim

A method for managing neighbor information, characterized in that the method comprises:

The user equipment UE camps on the evolved universal terrestrial radio access network E-UTRAN cell, and determines that the previously camped cell is not in the neighbor cell list of the currently camped cell, and reports the information of the previously camped cell to the evolved Node B. ENB;

The method according to claim 1, wherein the UE camps on the E-UTRAN cell, including:

The UE reselects from one type of cell to the E-UTRAN cell by cell reselection and camps on the E-UTRAN cell.

The method according to claim 2, wherein the one type of cell is: another E-UTRAN cell, a terrestrial radio access network UTRAN cell, a global mobile communication system GSM cell, or a code division multiple access CDMA Community.

The method according to claim 1, 2 or 3, wherein before the determining that the previously camped cell is not in the neighbor cell list of the currently camped cell, the method further includes:

The ENB informs the UE of the neighboring cell information of the currently camped cell of the UE, and informs the UE of the indication of reporting the neighboring cell information.

The method according to claim 4, wherein the UE determines that the previously camped cell is not in the neighbor list of the currently camped cell, and includes:

The UE determines whether the neighbor cell information of the currently camped cell from the ENB includes the information of the previously camped cell, and if not, determines that the previously camped cell is not in the neighbor cell list of the currently camped cell.

6. A management system for cell neighborhood information, characterized in that the system comprises:

UE, used to camp on the E-UTRAN cell, determining that the previously camped cell is not currently camping When the cell is in the neighbor list, the information of the previously camped cell is reported to the ENB;

The ENB is used to add the missing neighbor information to the neighbor list of the cell in which the UE currently camps.

The system according to claim 6, wherein the UE is used to camp on an E-UTRAN cell, and includes:

The system according to claim 7, wherein the one type of cell is: another type of cell such as an E-UTRAN cell, a UTRAN cell, a GSM cell or a CDMA cell.

9. A system according to claim 6, 7 or 8, wherein said ENB is further used to:

The neighboring cell information of the currently camped cell of the UE is notified to the UE, and the indication of the information of the neighboring cell is notified to the UE.

The system according to claim 9, wherein the UE is configured to determine that the previously camped cell is not in the neighbor list of the currently camped cell, and includes:

The UE is configured to determine whether the neighboring cell information of the currently camped cell from the ENB includes information of the previously camped cell, and when not included, determine that the previously camped cell is not in the neighbor cell list of the currently camped cell.