Method of handling random access procedure associated to cell deactivation

• US 8,824,408 B2
• Filed: 08/06/2012
• Issued: 09/02/2014
• Est. Priority Date: 08/11/2011
• Status: Active Grant

• Current Assignee: Acer, Inc.
• Original Assignee: Industrial Technology Research Institute
• Inventors: Wang, Chun-Yen
• Primary Examiner(s): LIN, KENNY S
• Application Number:
  US13/568,119
• Publication Number:
  US 20130039294A1
• Time in Patent Office: 757 Days
• Field of Search: 709/207, 370/329
• US Class Current: 370/329
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

A method of handling random access procedure associated to cell deactivation for a mobile device in a wireless communication system is disclosed. The method comprises activating a secondary cell configured by a network of the wireless communication system, performing a random access procedure for the activated secondary cell, and when the secondary cell is deactivated during the random access procedure, continuously performing the random access procedure.

Claims

1. A method of handling random access procedure on secondary cell for a network in a wireless communication system, the method comprising:

configuring a secondary cell for a mobile device of the wireless communication system; and

providing a signaling for indicating the priority between a random access procedure and a deactivation of the secondary cell, to the mobile device.

2. The method of claim 1, wherein the signaling is a RRC signaling.

3. The method of claim 1, wherein the signaling is a physical downlink control channel (PDCCH) order which initiates the random access procedure.

4. The method of claim 1, wherein the signaling is an Activation/Deactivation command.

5. A method of handling random access procedure associated to cell deactivation for a mobile device in a wireless communication system, the method comprising:

receiving a signaling for adding a secondary cell configured by a network of the wireless communication system; and

receiving a signaling for indicating the priority between a random access procedure and a deactivation of the secondary cell from the network.

6. The method of claim 5, wherein the signaling is a RRC signaling.

7. The method of claim 5, wherein the signaling is a physical downlink control channel (PDCCH) order which initiates the random access procedure.

8. The method of claim 5, wherein the signaling is an Activation/Deactivation command.

9. The method of claim 5, further comprising:

activating the secondary cell configured by the network of the wireless communication system;

performing the random access procedure for the activated secondary cell; and

determining whether to perform the random access procedure according to the signaling received from the network when the secondary cell is deactivated during the random access procedure.

10. The method of claim 9, wherein determining whether to perform the random access procedure according to the signaling received from the network when the secondary cell is deactivated during the random access procedure comprises:

when the secondary cell is deactivated during the random access procedure and the signaling indicates the random access procedure has higher priority than the deactivation of the secondary cell, continuously performing the random access procedure; and

when the secondary cell is deactivated during the random access procedure and the signaling indicates the deactivation of the secondary cell has higher priority than the random access procedure, aborting the random access procedure.

11. The method of claim 10, wherein when the secondary cell is deactivated during the random access procedure and the signaling indicates the random access procedure has higher priority than the deactivation of the secondary cell, continuously performing the random access procedure comprises:

when the secondary cell is deactivated during the random access procedure and the signaling indicates the random access procedure has higher priority than the deactivation of the secondary cell, continuously monitoring a physical downlink control channel (PDCCH) in associated subframes for the random access procedure.

12. The method of claim 11, wherein the associated subframes is a subframe that the network sends a random access response of the random access procedure and/or contention resolution of the random access procedure.

13. The method of claim 10, further comprising:

reactivating the secondary cell when the random access procedure is successfully completed.

14. The method of claim 10, wherein when the secondary cell is deactivated during the random access procedure and the signaling indicates the deactivation of the secondary cell has higher priority than the random access procedure, aborting the random access procedure comprises:

discarding explicitly signaled random access preamble index and/or random access physical random access channel mask index for indicating subframes which can be transmitted a random access preamble of the random access procedure.

15. The method of claim 10, wherein when the secondary cell is deactivated during the random access procedure and the signaling indicates the deactivation of the secondary cell has higher priority than the random access procedure, aborting the random access procedure comprises:

flushing a Hybrid Automatic Repeat Request (HARQ) buffer used for transmission of the MAC PDU in the message 3 buffer.

16. The method of claim 9, wherein the secondary cell is deactivated during the random access procedure due to a deactivation timer for the secondary cell expires during the random access procedure.

17. The method of claim 9, wherein the secondary cell is deactivated during the random access procedure due to a signaling for deactivating the secondary cell is received from the network during the random access procedure.