Method, apparatus, and system for detecting a radio network problem

Patent metadata

Field	Value
Publication number	US-9838920-B2
Application number	US-201414202953-A
Country	US
Kind code	B2
Filing date	Mar 10, 2014
Priority date	Feb 20, 2009
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

A system, base station and method are disclosed for detecting a radio network problem. For a handover failure occurs on a user equipment (UE), a first base station receives, problem information about the occurred handover failure from the UE, after a radio resource control (RRC) connection is reestablished or established between the UE and a cell controlled by the first base station. The first base station then transmits the received problem information to a second base station controlling a cell where the handover failure occurs. In this way, the network side can automatically identify and detect the handover failure. As such, the network can perform self-adjustment and optimization, therefore improving the network performance and satisfying use requirements of users.

First claim

What is claimed is:

1. A radio network system for detecting a radio network problem, the system comprising:
a first base station controlling a new cell; and
a second base station controlling a previous cell,
wherein the first base station is configured to:
receive, from a user equipment (UE), problem information indicating a handover failure occurred on the UE in the previous cell controlled by the second base station, after a radio resource control (RRC) connection is reestablished or established between the UE and the new cell; and
transmit, upon receiving the problem information, the received problem information to the second base station controlling the previous cell, wherein the problem information is used by the second base station to perform a problem analysis to the handover failure according to the problem information, and to perform parameter optimization to solve the handover failure.

2. The system of claim 1 , wherein the previous cell is a source cell (S-Cell) and the new cell is a target cell (T-Cell), and wherein the problem information includes signal quality of at least one of the S-Cell and the T-Cell.

3. The system of claim 2 , wherein the signal quality includes at least one of reference signal received power (RSRP) and reference signal received quality (RSRQ).

4. The system of claim 1 , wherein the previous cell is a source cell (S-Cell), and wherein the problem information includes identify information of the S-Cell when the handover failure occurs, and the identify information of the S-Cell includes at least one of a frequency, a physical cell identity (PCI), a cell global identity (CGI), an IP, and a PLMN ID of the S-Cell.

5. The system of claim 1 , wherein the new cell is a target cell (T-Cell), and wherein the problem information includes identify information of the T-Cell when the handover failure occurs, and the identify information of the T-Cell includes at least one of a frequency, a physical cell identity (PCI), a cell global identity (CGI), an IP, and a PLMN ID of the T-Cell.

6. The system of claim 1 , wherein the previous cell is a source cell (S-Cell), and the problem information includes identity information of a tracking area (TA) of the S-Cell when the handover failure occurs.

7. The system of claim 1 , wherein the problem information includes identity information of the UE, and the identify information of the UE includes a cell-radio network temporary identity (C-RNTI) of the UE, a temporary mobile subscriber identity (TMSI) of the UE, or an international mobile subscriber identity (IMSI) of the UE.

8. The system of claim 1 , wherein in transmitting the problem information operation, the transmitter is configured to transmit the problem information to the second base station through an interface between the first and second base stations; or through transference of a mobility management entity (MME) in a core network, an element management system (EMS), or a network management system (NMS).

9. The radio network system according to claim 1 , wherein the second base station is configured to receive the problem information in a message transmitted by the UE to the first base station.

10. A base station comprising:
a receiver configured to receive, from a user equipment (UE), problem information indicating a handover failure occurred on the UE in a previous cell controlled by another base station, after a radio resource control (RRC) connection is reestablished or established between the UE and a new cell controlled by the base station; and
a transmitter configured to transmit the received problem information to the another base station controlling the previous cell, wherein the problem information is used by the another base station to perform a problem analysis to the handover failure according to the problem information, and to perform parameter optimization to solve the handover failure.

11. The base station of claim 10 , wherein the previous cell is a source cell (S-Cell) and the new cell is a target cell (T-Cell), and wherein the problem information includes signal quality of at least one of the S-Cell and the T-Cell.

12. The base station of claim 11 , wherein the signal quality includes at least one of reference signal received power (RSRP) and reference signal received quality (RSRQ).

13. The base station of claim 10 , wherein the previous cell is a source cell (S-Cell), and wherein the problem information includes identify information of the S-Cell when the handover failure occurs, and the identify information of the S-Cell includes at least one of frequency, a physical cell identity (PCI), a cell global identity (CGI), an IP, and a PLMN ID of the S-Cell.

14. The base station of claim 10 , wherein the new cell is a target cell (T-Cell), and wherein the problem information includes identify information of the T-Cell when the handover failure occurs, and the identify information of the T-Cell includes at least one of a frequency, a physical cell identity (PCI), a cell global identity (CGI), an IP, and a PLMN ID of the T-Cell.

15. The base station of claim 10 , wherein the previous cell is a source cell (S-Cell), and wherein the problem information includes identity information of a tracking area (TA) of the S-Cell when the handover failure occurs.

16. The base station of claim 10 , wherein the problem information includes identity information of the UE, and the identify information of the UE includes a cell-radio network temporary identity (C-RNTI) of the UE, a temporary mobile subscriber identity (TMSI) of the UE, or an international mobile subscriber identity (IMSI) of the UE.

17. The base station of claim 10 , wherein the transmitter is configured to transmit the problem information to the another base station controlling the cell where the handover failure occurs through an interface between the base station and the another base station; or through transference of a mobility management entity (MME) in a core network, an element management system (EMS), or a network management system (NMS).

18. A method for detecting a radio network problem, the method comprising:
receiving, by a first base station controlling a new cell that a radio resource control (RRC) connection is reestablished or established with a user equipment (UE), problem information indicating a handover failure occurred on the UE in a previous cell controlled by a second base station, after the RRC connection is established; and
transmitting, by the first base station, the problem information to the second base station controlling the previous cell where the handover failure occurs, upon receiving the problem information from the UE, wherein the problem information is used by the second base station to perform a problem analysis to the handover failure according to the problem information, and to perform parameter optimization to solve the handover failure.

19. The method of claim 18 , wherein the previous cell is a source cell (S-Cell) and the new cell is a target cell (T-Cell), and wherein the problem information includes signal quality of at least one of the S-Cell and the T-Cell.

20. The method of claim 19 , wherein the signal quality includes at least one of reference signal received power (RSRP) and reference signal received quality (RSRQ).

21. The method of claim 18 , wherein the previous cell is a source cell (S-Cell), and wherein the problem information includes identify information of the S-Cell when the handover failure occurs, and the identify information of the S-Cell includes at leas

Assignees

• Huawei Tech Co Ltd

Inventors

• Wang Xuelong
• Wang Jun
• Huang Ying
• Legg Peter
• Johansson Johan

Classifications

• H04W76/18

  Management of setup rejection or failure · CPC title

• H04W24/08 Primary

  Testing, {supervising or monitoring} using real traffic · CPC title

• H04W24/04

  Arrangements for maintaining operational condition · CPC title

• H04W76/027

  Electricity · mapped topic

• H04W36/0055 Primary

  Transmission or use of information for re-establishing the radio link · CPC title