Method and device for resource configuration in handover

• US 10,200,921 B2
• Filed: 02/23/2017
• Issued: 02/05/2019
• Est. Priority Date: 04/01/2016
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Li, Yunxi, Lu, Qianxi
• Primary Examiner(s): Sarwar, Babar
• Application Number:
  US15/511,180
• Publication Number:
  US 20170289874A1
• Time in Patent Office: 712 Days
• CPC Class Codes: H04W 24/04 Arrangements for maintaining operational condition
• CPC Class Codes: H04W 36/0072 of resource information of target access point
• CPC Class Codes: H04W 36/037 by reducing handover delay, e.g. latency
• CPC Class Codes: H04W 36/04 Reselecting a cell layer in multi-layered cells
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 76/38 triggered by timers

Abstract

A technique relating to resource configuration in a wireless communication network. A terminal device in the wireless communication network receives information about supplemental resource from a source cell. Then the terminal device determines a time interval, in which the supplemental resource is available to the terminal device, in a transition period of a handover from the source cell to a target cell based on a timer associated with a random access procedure in the handover. In this way, the terminal device may use the supplemental resource during the handover.

Claims

1. A method at least partially implemented at a terminal device in a wireless communication network, comprising:

receiving information about supplemental resource from a source cell; and

determining, based on a timer associated with a random access procedure in a handover of the terminal device from the source cell to a target cell, a time interval in a portion of a transition period of the handover, the supplemental resource being available to the terminal device in the determined time interval, wherein the transition period is a period of time from receiving a connection reconfiguration message from the source cell to receiving a connection reconfiguration message from the target cell, wherein the timer and the time interval commence at the receiving of the connection reconfiguration message from the source cell, and wherein the interval ends when a MAC layer has successfully completed random access procedure with the target cell.

2. The method according to claim 1, wherein at least one of the connection reconfiguration message from the source cell and the connection reconfiguration message from the target cell is a Radio Resource Control (RRC) connection reconfiguration.

3. The method according to claim 1, further comprising:

in response to the timer expiring, starting a further timer associated with a cell selection procedure to extend the time interval.

4. The method according to claim 1, further comprising:

adjusting the timer according to at least one of;

Global Navigation Satellite System (GNSS) timing, and

common timing of the wireless communication network.

5. The method according to claim 1, wherein the timer is T304.

6. A method at least partially implemented at a network device in a wireless communication network, comprising:

transmitting information about supplemental resource to a terminal device, to enable the terminal device to determine, based on a timer associated with a random access procedure in a handover of the terminal device from a source cell to a target cell, a time interval in a portion of a transition period of the handover, the supplemental resource being available to the terminal device in the determined time interval, wherein the transition period is a period of time from receiving a connection reconfiguration message from the source cell to receiving a connection reconfiguration message from the target cell at the terminal device, wherein the timer and the time interval commence at the receiving of the connection reconfiguration message from the source cell at the terminal device, and wherein the time interval ends when a MAC layer of the terminal device has successfully completed random access procedure with the target cell.

7. An apparatus at least partially implemented at a terminal device in a wireless communication network, comprising:

a receiver configured to receive information about supplemental resource from a source cell; and

a controller configured to determine, based on a timer associated with a random access procedure in a handover of the terminal device from the source cell to a target cell, a time interval in a portion of a transition period of the handover, the supplemental resource being available to the terminal device in the determined time interval, wherein the transition period is a period of time from receiving a connection reconfiguration message from the source cell to receiving a connection reconfiguration message from the target cell, wherein the timer and the time interval commence at the receiving of the connection reconfiguration message from the source cell, and wherein the time interval ends when a MAC layer has successfully completed random access procedure with the target cell.

8. The apparatus according to claim 7, wherein

at least one of the connection reconfiguration message from the source cell and the connection reconfiguration message from the target cell is a Radio Resource Control (RRC) connection reconfiguration.

9. The apparatus according to claim 7, wherein the controller is further configured to:

in response to the timer expiring, start a further timer associated with a cell selection procedure to extend the time interval.

10. The apparatus according to claim 7, wherein the controller is further configured to:

adjust the timer according to at least one of;

Global Navigation Satellite System (GNSS) timing, and

common timing of the wireless communication network.

11. The apparatus according to claim 7, wherein the timer is T304.

12. An apparatus at least partially implemented at a network device in a wireless communication network, comprising:

a transmitter configured to transmit information about supplemental resource to a terminal device, to enable the terminal device to determine, based on a timer associated with a random access procedure in a handover of the terminal device from a source cell to a target cell, a time interval in a portion of a transition period of the handover, the supplemental resource being available to the terminal device in the determined time interval, wherein the transition period is a period of time from receiving a connection reconfiguration message from the source cell to receiving a connection reconfiguration message from the target cell at the terminal device, wherein the timer and the time interval commence at the receiving of the connection reconfiguration message from the source cell at the terminal device, and wherein the time interval ends when a MAC layer of the terminal device has successfully completed random access procedure with the target cell.

13. A non-transitory computer readable storage medium including instructions stored therein which, when executed on a processor of a device, cause the device to perform operations comprising:

receiving information about supplemental resource from a source cell; and

determining, based on a timer associated with a random access procedure in a handover of the device from the source cell to a target cell, a time interval in a portion of a transition period of the handover, the supplemental resource being available to the device in the determined time interval, wherein the transition period is a period of time from receiving a connection reconfiguration message from the source cell to receiving a connection reconfiguration message from the target cell, wherein the timer and the time interval commence at the receiving of the connection reconfiguration message from the source cell, and wherein the time interval ends when a MAC layer has successfully completed random access procedure with the target cell.

14. The non-transitory computer readable storage medium according to claim 13, wherein at least one of the connection reconfiguration message from the source cell and the connection reconfiguration message from the target cell is a Radio Resource Control (RRC) connection reconfiguration.

15. The non-transitory computer readable storage medium according to claim 13, wherein the instructions, when executed on the processor, further cause the device to perform operations comprising:

in response to the timer expiring, starting a further timer associated with a cell selection procedure to extend the time interval.

16. The non-transitory computer readable storage medium according to claim 13, wherein the instructions, when executed on the processor, further cause the device to perform operations comprising:

adjusting the timer according to at least one of;

Global Navigation Satellite System (GNSS) timing, and

common timing of a wireless communication network of the device.

17. The non-transitory computer readable storage medium according to claim 13, wherein the instructions, when executed on the processor, further cause the device to perform operations, in which the timer is T304.

18. A non-transitory computer readable storage medium including instructions stored therein which, when executed on a processor of a device, cause the device to perform operations comprising:

transmitting information about supplemental resource to a terminal device, to enable the terminal device to determine, based on a timer associated with a random access procedure in a handover of the terminal device from a source cell to a target cell, a time interval in a portion of a transition period of the handover, the supplemental resource being available to the terminal device in the determined time interval, wherein the transition period is a period of time from receiving a connection reconfiguration message from the source cell to receiving a connection reconfiguration message from the target cell at the terminal device, wherein the timer and the time interval commence at the receiving of the connection reconfiguration message from the source cell at the terminal device, and wherein the time interval ends when a MAC layer of the terminal device has successfully completed random access procedure with the target cell.