METHOD FOR JOINING A WIRELESS COMMUNICATION DEVICE TO A WIRELESS TRANSMISSION NETWORK

• US 20100142405A1
• Filed: 12/28/2007
• Published: 06/10/2010
• Est. Priority Date: 04/13/2007
• Status: Abandoned Application

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Xu, Ling, Cai, Sean
• Application Number:
  US12/595,667
• Publication Number:
  US 20100142405A1
• Time in Patent Office: Days
• US Class Current: 370/254
• CPC Class Codes: H04W 36/0079 in case of hand-off failure or rejection
• CPC Class Codes: H04W 36/30 by measured or perceived connection quality data
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service
• CPC Class Codes: H04W 76/22 Manipulation of transport tunnels

Abstract

A method for a device to join a wireless communication network, after the device accesses to the wireless communication network group through a source node, the method comprising the following steps of: (a) if the device needs a handover, completes the handover successfully by accessing to a target node and establishes a service connection, proceeding to step (b), otherwise proceeding to step (c); (b) a management node of the wireless communication network group to which the target node accessed to by the device belongs updating a stored wireless network topology information of the wireless network group, to complete the joining of said wireless communication device, and the method ending; (c) a management node of the wireless communication network group to which the source node accessed to by the device belongs updating a stored wireless network topology information of the wireless communication network group, to complete the joining of said device.

Claims

1. A method for a wireless communication device to join a wireless communication network, the wireless communication network being a wireless communication network group consisting of a base station and wireless relay stations subordinated to the base station;

after said wireless communication device accesses to the wireless communication network group through a source node, the method comprising the following steps of;

(a) if said wireless communication device needs a handover, completes the handover successfully by accessing to a target node and establishes a service connection, proceeding to step (b), otherwise proceeding to step (c);

(b) a management node of the wireless communication network group to which the target node accessed to by said wireless communication device belongs updating stored wireless network topology information of the wireless network group, to complete the joining of said wireless communication device, and the method ending;

(c) a management node of the wireless communication network group to which the source node accessed to by said wireless communication device belongs updating stored wireless network topology information of the wireless communication network group, to complete the joining of said wireless communication device;

wherein said source node is a source base station or source wireless relay station; and

said target node is a target base station or target wireless relay station.

2. A method of claim 1, wherein said wireless communication device is a wireless relay station or a mobile station.

3. A method of claim 1, further comprising:

in step (a), judging whether said wireless communication device needs said handover based on handover judgment basic information; and

said handover judgment basic information comprising;

the wireless network topology information of the wireless communication network group to which said source node belongs.

4. A method of claim 3, wherein, step (a) further divides into the following sub-steps of:

(a11) said wireless communication device judging whether a handover is needed based on said handover judgment basic information and a predetermined handover judgment strategy, and if the handover is needed, said wireless communication device sending a link update request to said source base station; and

judging whether the handover is allowed based on a link update response fed back by said source base station, and if the handover is allowed, proceeding to step (a12), otherwise proceeding to step (c);

(a12) said wireless communication device accessing to a target node designated in the link update response; and

if the access is successful, proceeding to step (b);

otherwise proceeding to step (c).

5. A method of claim 4, further comprising:

in step (a11), after receiving said link update request, said source base station judging whether said wireless communication device is allowed to handover based on the handover judgment basic information and the predetermined handover judgment strategy, and if the handover is allowed, said source base station including identifier information of a target node selected in said link update response.

6. A method of claim 5, further comprising:

in step (a11), said link update request comprising identifier information of a target node to which the handover is requested; and

said source base station judging whether the handover is allowed further based on the identifier information.

7. A method of claim 3, wherein step (a) further divides into the following sub-steps of:

(a21) the management node of the wireless communication network group to which said source node belongs judging whether said wireless communication device needs a handover based on said handover judgment basic information and a predetermined handover judgment strategy, if the handover is needed, the management node determining a target node, notifying said wireless communication device of the target node determined, and proceeding to step (a22);

otherwise proceeding to step (c);

(a22) said wireless communication device accessing to said target node; and

if the access is successful, proceeding to step (b);

otherwise proceeding to step (c).

8. A method of claim 3, wherein said wireless communication device accesses to the wireless communication network group through a source wireless relay station;

and step (a) further divides into the following sub-steps of;

(a21) said source wireless relay station judging whether said wireless communication device needs a handover based on said handover judgment basic information and a predetermined handover judgment strategy, and if the handover is needed, said source wireless relay station determining a target node, notifying said wireless communication device of the target node determined, and proceeding to step (a22);

otherwise proceeding to step (c);

(a22) said wireless communication device accessing to said target node; and

if the access is successful, proceeding to step (b);

otherwise proceeding to step (c).

9. A method of claim 8, wherein the wireless network topology information of the wireless communication network group to which said source wireless relay station belongs comprised in said handover judgment basic information is the wireless network topology information of a sub-network of the source wireless relay station.

10. A method of claim 7, wherein said handover judgment basic information further comprises wireless link status information;

and after said wireless communication device accesses to the wireless communication network group through the source node, before step (a1), the method further comprises the following steps of;

(a31) said management node designating said wireless communication device to perform a detection of the wireless link status and designating relative nodes to cooperate for the detection;

(a32) said wireless communication device sending a test signal; and

said relative nodes which receive said test signal feeding back test responses to said wireless communication device;

(a33) said wireless communication device generating a detection result based on said test responses and sending the detection result to said management node;

(a34) said management node acquiring the wireless link status information based on the detection result and updating the wireless link status information stored.

11. A method of claim 4, wherein, said handover judgment basic information further comprises:

wireless link status information, and/or information of adjacent cells; and

said information of adjacent cells is;

the wireless network topology information, or the wireless network topology information together with the wireless link status information of adjacent wireless communication network groups.

12. A method of claim 4, wherein said handover judgment strategy is:

if a number of hops between a node and said wireless communication device is smaller than the number of hops between said source node and said wireless communication device, and/or a wireless link quality of the node is better than that of said source node, a handover is performed and the node is determined as the target node.

13. A method of claim 1, further comprising:

in step (b) and step (c),

if said target node or source node is a wireless relay station, and the wireless relay station is an agent node which stores the wireless network topology information of a transmission sub-network subordinated to the wireless relay station, the agent node updating the wireless network topology information, and reporting update information of the access of said wireless communication device to said management node; and

said management node updating said stored wireless network topology information according to the update information;

if said target node or source node is a wireless relay station, and the wireless relay station is not an agent node, the wireless relay station reporting the update information of the access of said wireless communication device to said management node; and

said management node updating said stored wireless network topology information according to the update information;

if said target node or source node is a base station, and the base station is the management node, the base station updating said stored wireless network topology information according to the update information of the access of said wireless communication device;

if said target node or source node is a base station, and the base station is not the management node, the base station reporting the update information of the access of said wireless communication device to said management node; and

said management node updating said stored wireless network topology information according to the update information.

14. A method of claim 1, further comprising:

after updating said wireless network topology information, said management node further updating corresponding wireless link status information.

15. A method of claim 1, further comprising:

before said wireless communication device accesses to the wireless communication network group through the source node, said wireless communication device receiving a broadcasting message from the wireless communication network group; and

storing the wireless network topology information and wireless link status information of the wireless communication network group comprised in the message.

16. A method of claim 15, wherein said broadcasting message is a downlink channel description message.

17. A method of claim 1, wherein said wireless network topology information comprises information of a connection relationship and a number of connection hops between any two nodes in the wireless communication network group;

and said management node is a node in the wireless communication network group in charge of constructing, updating and transmitting the wireless network topology information of the wireless communication network group within the wireless communication network group.

18. A method of claim 7, wherein, said handover judgment basic information further comprises:

wireless link status information, and/or information of adjacent cells; and

said information of adjacent cells is;

the wireless network topology information, or the wireless network topology information together with the wireless link status information of adjacent wireless communication network groups.

19. A method of claim 8, wherein, said handover judgment basic information further comprises:

wireless link status information, and/or information of adjacent cells; and

said information of adjacent cells is;

the wireless network topology information, or the wireless network topology information together with the wireless link status information of adjacent wireless communication network groups.

20. A method of claim 7, wherein said handover judgment strategy is:

if a number of hops between a node and said wireless communication device is smaller than the number of hops between said source node and said wireless communication device, and/or a wireless link quality of the node is better than that of said source node, a handover is performed and the node is determined as the target node.

21. A method of claim 8, wherein said handover judgment strategy is:

if a number of hops between a node and said wireless communication device is smaller than the number of hops between said source node and said wireless communication device, and/or a wireless link quality of the node is better than that of said source node, a handover is performed and the node is determined as the target node.