METHOD OF PERFORMING PROCEDURES FOR INITIAL NETWORK ENTRY AND HANDOVER IN A BROADBAND WIRELESS ACCESS SYSTEM

• US 20090323634A1
• Filed: 05/14/2007
• Published: 12/31/2009
• Est. Priority Date: 05/13/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Jeong Ki, Ryu, Ki Seon, Kim, Yong Ho
• Granted Patent: US 8,311,011 B2
• Time in Patent Office: Days
• US Class Current: 370/331
• CPC Class Codes: H04W 36/08 Reselecting an access point
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 48/20 Selecting an access point
• CPC Class Codes: H04W 52/287 when the channel is in stand-by
• CPC Class Codes: H04W 52/40 during macro-diversity or soft handoff
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02
• CPC Class Codes: H04W 74/0866 using a dedicated channel for access
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Disclosed is a method of performing procedures for network entry of a mobile station in a broadband wireless access system. The method includes being allocated with transmission parameters from a base station, at least one time performing a request of an uplink band for transmission of an uplink management message to the base station, and receiving a downlink message for next procedure from the base station if the uplink band is not allocated even after the lapse of a preset time period.

Claims

1. A method of performing procedures for network entry of a mobile station in a broadband wireless access system, the method comprising:

being allocated with transmission parameters from a base station;

at least one time performing a request of an uplink band for transmission of an uplink management message to the base station; and

receiving a downlink message for next procedure from the base station if the uplink band is not allocated even after the lapse of a preset time period.

2. The method of claim 1, wherein the transmission parameters include basic connection identifier and primary management connection identifier.

3. The method of claim 1, wherein the uplink management message is any one of a basic capability request message (SBC-REQ), a private key management request message (PKM-REQ), and a registration request message (REG-REQ).

4. The method of any one of claim 1 to claim 3, wherein the uplink management message is a reset command message (RES-CMD) which commands the mobile station to perform a new network entry procedure.

5. The method of claim 4, further comprising releasing the transmission parameters.

6. The method of any one of claim 1 to claim 3, wherein the uplink management message is a message for allocating a non-contention based uplink radio resource to the mobile station.

7. The method of claim 6, further comprising transmitting the uplink management message through the non-contention based uplink radio resource.

8. The method of any one of claim 1 to claim 3, wherein the uplink management message is a message which commands the mobile station to perform a network entry procedure to another base station.

9. The method of claim 8, further comprising releasing the transmission parameters.

10. A method of performing procedures for network entry of a mobile station in a broadband wireless access system, the method comprising:

allocating transmission parameters to the mobile station;

checking whether there is a request of an uplink band for transmission of an uplink management message from the mobile station for a preset time period; and

transmitting a downlink message for next procedure to the mobile station if there is no request of the uplink band even after the lapse of the preset time period.

11. A method of performing procedures for network entry of a mobile station in a broadband wireless access system, the method comprising:

transmitting a registration request message (REG-REQ) to a base station;

receiving a registration response message (REG-RSP) from the base station;

if a downlink message for setting a service flow is not received from the base station for a preset time period, notifying it to the base station; and

receiving the downlink message for setting a service flow from the base station.

12. A method of performing procedures for network entry of a mobile station in a broadband wireless access system, the method comprising:

receiving a registration request message (REG-REQ) from the mobile station;

transmitting a registration response message (REG-RSP) to the mobile station;

transmitting a downlink message for setting a service flow to the mobile station at least one time; and

if a response to the downlink message for setting a service flow is not received from the mobile station for a preset time period, transmitting a downlink message to the mobile station to command the mobile station to again perform initiation procedure.

13. A method of performing procedures for network entry of a mobile station in a broadband wireless access system, the method comprising:

transmitting a registration request message (REG-REQ) to a base station;

receiving a registration response message (REG-RSP) from the base station;

if a downlink message for setting a service flow is not received from the base station for a preset time period, transmitting a registration release request message to the base station; and

receiving a registration release response message from the base station.

14. The method of claim 13, further comprising releasing transmission parameters allocated from the base station.

15. A method of performing network entry in a wireless communication system, the method comprising:

receiving network re-entry control information of network entry time of at least one mobile station, which is set to a specific value for re-entry due to restart of a base station; and

performing network re-entry depending on the received network re-entry control information.

16. The method of claim 15, wherein the network re-entry control information is different from network entry control information set for spontaneous network entry of the mobile station.

17. The method of claim 15, wherein the network re-entry control information is control information of backoff window for initial ranging.

18. The method of claim 15, wherein the network entry time of the network re-entry control information is slower than that of network entry control information set for spontaneous network entry of the mobile station.

19. The method of claim 15, wherein the network re-entry control information is set to receive at least one mobile station registered in network before restart of the base station.

20. The method of claim 15, wherein the network entry time of the network re-entry control information depends on an operation mode of the mobile station.

21. The method of claim 20, wherein the operation mode includes any one of a normal mode, a sleep mode, and an idle mode.

22. The method of claim 21, wherein the sleep mode is divided into a plurality of classes.

23. The method of claim 20, wherein the network entry time of the network re-entry control information depends on service type provided to the mobile station.

24. A method of performing network entry in a wireless communication system, the method comprising:

if re-registration of a specific first mobile station is needed due to restart of a base station,

setting network re-entry control information of network entry time of at least one mobile station to a specific first value determined for re-registration due to restart of the base station and transmitting the set value to the mobile station; and

performing re-registration procedure of the first mobile station which tries network entry based on the network re-entry control information.

25. A method of performing handover of a mobile station in a power saving mode in controlling power saving class configuration information of a first base station during handover from the first base station to a second base station, the method comprising:

transmitting a ranging request message for network entry from a mobile station to the second base station;

receiving a ranging response message from the second base station, the ranging response message including control information of the power saving class configuration information of the first base station; and

processing the power saving class configuration information of the first base station depending on the control information.

26. The method of claim 25, wherein the control information is information which indicates release of the power saving class configuration information of the first base station, and the mobile station releases the corresponding class configuration information depending on the control information.

27. The method of claim 26, further comprising:

transmitting a request message for definition and activation of a new power saving class from the mobile station to the second base station; and

receiving a response message to the request message from the second base station, defining and activating the new power saving class depending on the corresponding response message, and performing conversion to the power saving mode.

28. The method of claim 25, wherein the control information includes information which indicates update of the power saving class configuration information of the first base station and power saving class configuration information to be updated, and the mobile station updates the existing class configuration information to class configuration information included in the control information.

29. The method of claim 28, wherein an item of the existing class configuration information, which is not updated, is maintained as it is.

30. The method of claim 28, wherein an item of the existing class configuration information, which is not updated, is released.

31. The method of any one of claim 28 to claim 30, further comprising:

transmitting a request message for activation of the updated power saving class from the mobile station to the second base station; and

receiving a response message to the request message from the second base station, activating the power saving class depending on the corresponding response message, and performing conversion to the power saving mode.

32. The method of claim 25, wherein the control information includes information which indicates maintenance of the power saving class configuration information of the first base station, and the mobile station maintains the corresponding class configuration information depending on the control information.

33. The method of claim 32, further comprising:

transmitting a request message for activation of the maintained power saving class from the mobile station to the second base station; and

receiving a response message to the request message from the second base station, activating the power saving class depending on the corresponding response message, and performing conversion to the power saving mode.

34. The method of claim 25, further comprising:

canceling handover to the second base station and performing re-entry to the first base station;

transmitting a ranging request message for network re-entry to the first base station;

receiving a ranging response message from the first base station, the ranging response message including control information of the power saving class configuration information; and

processing the power saving class configuration information depending on the control information.

35. A mobile station which controls power saving class configuration information of a first base station during handover from the first base station to a second base station, the mobile station comprising:

a radio communication module transmitting a ranging request message for network entry to the second base station and receiving a ranging response message from the second base station, the ranging response message including control information of the power saving class configuration information of the first base station; and

a control module processing the power saving class configuration information of the first base station depending on the control information.

36. The mobile station of claim 35, wherein the control information is information which indicates release of the power saving class configuration information of the first base station, and the control module releases the corresponding class configuration information depending on the control information.

37. The mobile station of claim 36, wherein the radio communication module further includes a function of transmitting a request message for definition and activation of a new power saving class to the second base station and receiving a response message to the request message from the second base station, and the control module further includes a function of defining and activating a new power saving class depending on the corresponding response message and performing conversion to a power saving mode.

38. The mobile station of claim 35, wherein the control information includes information which indicates update of the power saving class configuration information of the first base station and power saving class configuration information to be updated, and the control module updates the existing class configuration information to class configuration information included in the control information.

39. The mobile station of claim 38, wherein the radio communication module further includes a function of transmitting a request message for activation of the updated power saving class to the second base station and receiving a response message to the request message from the second base station, and the control module further includes a function of activating the power saving class depending on the corresponding response message and performing conversion to a power saving mode.

40. The mobile station of claim 35, wherein the control information is information which indicates maintenance of the power saving class configuration information of the first base station, and the control module maintains the corresponding class configuration information depending on the control information.

41. The mobile station of claim 40, wherein the radio communication module further includes a function of transmitting a request message for activation of the maintained power saving class to the second base station and receiving a response message to the request message from the second base station, and the control module further includes a function of activating the power saving class depending on the corresponding response message and performing conversion to a power saving mode.

42. The mobile station of claim 35, wherein if handover to the second base station is canceled and re-entry to the first base station is performed, the radio communication module further includes a function of transmitting a request message for network re-entry to the first base station and receiving a ranging response message from the first base station, the ranging response message including control information of the power saving class configuration information, and the control module further includes a function of processing the power saving class configuration information depending on the control information transmitted from the first base station.

43. A method of performing handover of a mobile station in a power saving mode in controlling power saving class configuration information of the mobile station in a second base station during handover from a first base station to the second base station, the method comprising:

receiving a ranging request message for network entry to a second base station from a mobile station; and

transmitting a ranging response message to the mobile station, the ranging response message including control information of the power saving class configuration information of the first base station.

44. The method of claim 43, wherein the control information is information which indicates release of the power saving class configuration information of the first base station.

45. The method of claim 43, wherein the control information includes information which indicates update of the power saving class configuration information of the first base station and power saving class configuration information to be updated.

46. The method of claim 43, wherein the control information is information which indicates maintenance of the power saving class configuration information of the first base station.

47. A method of performing handover of a mobile station in performing handover related operation depending on handover triggering information, the method comprising:

receiving the handover triggering information from a service base station;

performing scan of neighboring base stations in a sleep mode; and

triggering specific handover related operation designated in the triggering information if the scan result adapts to trigger condition set in the triggering information.

48. The method of claim 47, further comprising changing a specific item of the handover triggering information during entry to a power saving mode.

49. The method of claim 47, wherein the handover triggering information designates at least one type of power saving class which allows-trigger of handover related operation.

50. The method of any one of claim 47 to claim 49, wherein the handover triggering information designates at least one handover related operation triggered as the scan result adapts to the trigger condition.

51. The method of claim 50, wherein the at least one handover related operation is independently designated for each class of the power saving mode.

52. The method of claim 51, wherein the handover related operation designated in the handover triggering information includes at least one of scan report, scan request, and handover request.

53. A mobile station of performing handover related operation depending on handover triggering information, the mobile station comprising:

a radio communication module receiving the handover triggering information and a signal for measurement of channel quality; and

a control module performing scan of neighboring base stations in a sleep mode and triggering specific handover related operation designated in the triggering information if the scan result adapts to trigger condition set in the triggering information.

54. The mobile station of claim 53, wherein the control module further includes a function of changing a specific item of the handover triggering information during entry to a power saving mode.

55. The mobile station of claim 53, wherein the handover triggering information designates at least one type of power saving class which allows trigger of the handover related operation.

56. The mobile station of any one of claim 53 to claim 55, wherein the handover triggering information designates at least one handover related operation triggered as the scan result adapts to the trigger condition.

57. The mobile station of claim 56, wherein the at least one handover related operation is independently designated for each class of the power saving mode.

58. The mobile station of claim 57, wherein the handover related operation designated in the handover triggering information includes at least one of scan report, scan request, and handover request.