Method of performing actions related to handover by a mobile station that is in power saving mode in a wireless mobile communication system

• US 8,208,974 B2
• Filed: 01/13/2010
• Issued: 06/26/2012
• Est. Priority Date: 06/09/2005
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Beom Joon, Ryu, Ki Seon
• Primary Examiner(s): Sobutka, Philip
• Application Number:
  US12/686,712
• Publication Number:
  US 20100150044A1
• Time in Patent Office: 895 Days
• Field of Search: None
• US Class Current: 455/574
• CPC Class Codes: H04W 36/24 Reselection being triggered by specific parameters
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method of performing actions related to handover by a mobile station (MS) in a wireless mobile communication system is disclosed. More specifically, the MS receives information from a base station (BS), wherein the information includes at least one action for performing handover and at least one condition corresponding to the at least one action. Furthermore, the MS transmits a request message to perform the at least one action based on the received information from the BS and receives a response message in response to the request message. Lastly, the MS performs the at least one action according to the received response message.

Claims

1. A method for supporting a sleep mode action of a mobile station (MS) in a wireless mobile communication system, the method comprising:

receiving, in the MS, a first message comprising trigger information, wherein the trigger information includes at least one trigger condition and at least one event action comprising a handover action which is performed upon reaching the at least one trigger condition;

transmitting, from the MS, a sleep request message comprising a first enabled triggered parameter, wherein the first enabled triggered parameter includes a first bitmap comprising a first bit which is set to indicate the handover action is enabled;

receiving, in the MS, a sleep response message comprising a second enabled triggered parameter, wherein the second enabled triggered parameter includes a second bitmap comprising a second bit which is set to indicate the handover action is enabled;

entering, by the MS, a sleep mode after receiving the sleep response message;

transmitting, from the MS, a handover request message when the at least one trigger condition corresponding to the handover action is reached in the sleep mode; and

receiving, in the MS, a handover response message in response to the handover request message.

2. The method of claim 1, wherein the trigger information further includes a trigger type field defined as at least a Carrier-to-Interference and Noise Ratio (CINR), a Received Signal Strength Indicator (RSSI), or a Round Trip Delay (RTD).

3. The method of claim 1, wherein the trigger information defines a trigger function which is a computation method for triggering the at least one event action.

4. The method of claim 1, wherein the first bit of the first bitmap is configured to a third bit of the first bitmap and the second bit of the second bitmap is configured to a fourth bit of the second bitmap.

5. The method of claim 1, further comprising:

transmitting, from the MS, a handover indication message indicating that the MS is about to perform the handover action to a target base station.

6. The method of claim 1, wherein the first message is a Downlink Channel Descriptor (DCD) message or a Neighbor Advertisement message.

7. A method for supporting a sleep mode action at a base station (BS) in a wireless mobile communication system, the method comprising:

transmitting, from the BS, a first message comprising trigger information, wherein the trigger information includes at least one trigger condition and at least one event action comprising a handover action which is performed upon reaching the at least one trigger condition;

receiving, in the BS, a sleep request message comprising a first enabled triggered parameter, wherein the first enabled triggered parameter includes a first bitmap comprising a first bit which is set to indicate the handover action is enabled;

transmitting, from the BS, a sleep response message comprising a second enabled triggered parameter, wherein the second enabled triggered parameter includes a second bitmap comprising a second bit which is set to indicate the handover action is enabled;

receiving, in the BS, a handover request message when a trigger condition corresponding to the handover action is reached in a sleep mode; and

transmitting, from the BS, a handover respond message in response to the handover request message.

8. The method of claim 7, wherein the trigger information further includes a trigger type field defined as at least a Carrier-to-Interference and Noise Ratio (CINR), a Received Signal Strength Indicator (RSSI), or a Round Trip Delay.

9. The method of claim 7, wherein the trigger information defines a trigger function which is a computation method for triggering the at least one event action.

10. The method of claim 7, wherein the first bit of the first bitmap is configured to a third bit of the first bitmap and the second bit of the second bitmap is configured to a fourth bit of the second bitmap.

11. The method of claim 7, further comprising:

receiving, in the BS, a handover indication message indicating that a mobile station is about to perform the handover action to a target base station.

12. The method of claim 7, wherein the first information is a Downlink Channel Descriptor (DCD) message or a Neighbor Advertisement message.

14. The mobile station of claim 12, wherein the trigger information further includes a trigger type field defined as at least one of Carrier-to-Interference and Noise Ratio (CINR), a Received Signal Strength Indicator (RSSI), and a Round Trip Delay (RTD).

13. A mobile station performing a sleep mode action in a wireless mobile communication system, wherein the mobile station is configured for:

receiving a first message comprising trigger information, wherein the trigger information includes at least one trigger condition and at least one event action comprising a handover action which is performed upon reaching the at least one trigger condition;

transmitting a sleep request message comprising a first enabled triggered parameter, wherein the first enabled triggered parameter includes a first bitmap comprising a first bit which is set to indicate the handover action is enabled;

receiving a sleep response message comprising a second enabled triggered parameter, wherein the second enabled triggered parameter includes a second bitmap comprising a second bit which is set to indicate the handover action is enabled;

entering a sleep mode after receiving the sleep response message;

transmitting a handover request message when the at least one trigger condition corresponding to the handover action is reached in the sleep mode; and

receiving a handover response message in response to the handover request message.

15. The mobile station of claim 13, wherein the first bit of the first bitmap is configured to a third bit of the first bitmap and the second bit of the second bitmap is configured to a fourth bit of the second bitmap.

16. The mobile station of claim 13, further configured for:

transmitting a handover indication message indicating that the MS is about to perform the handover action to a target base station.

17. The mobile station of claim 13, wherein the first message is a Downlink Channel Descriptor (DCD) message or a Neighbor Advertisement message.

18. A base station (BS) supporting a sleep mode action in a wireless mobile communication system, wherein the base station is configured for:

transmitting a first message comprising trigger information, wherein the trigger information includes at least one trigger condition and at least one event action comprising a handover action which is performed upon reaching the at least one trigger condition;

receiving a sleep request message comprising a first enabled triggered parameter, wherein the first enabled triggered parameter indicates a handover action;

transmitting a sleep response message comprising a second enabled triggered parameter, wherein the second enabled triggered parameter indicates the handover action;

receiving a handover request message when a trigger condition corresponding to the handover action is reached in a sleep mode; and

transmitting a handover response message in response to the handover request message.

19. The base station of claim 18, wherein the trigger information further includes a trigger type field defined as at least a Carrier-to-Interference and Noise Ratio (CINR), a Received Signal Strength Indicator (RSSI), or a Round Trip Delay (RTD).

20. The base station of claim 18, wherein:

the first enabled trigger parameter includes a first bitmap comprising a first bit and the second enabled trigger parameter includes a second bitmap comprising a second bit, and

the first and second bits are set to indicate that the handover action is enabled, and wherein the first bit is configured to a third bit of the first bitmap and the second bit is configured to a fourth bit of the second bitmap.

21. The base station of claim 18, further configured for:

receiving a handover indication message indicating that a mobile station is about to perform the handover action to a target base station.

22. The base station of claim 18, wherein the first message is a Downlink Channel Descriptor (DCD) message or a Neighbor Advertisement message.