Method of handling component carrier activation and deactivation and communication device thereof

Patent metadata

Field	Value
Publication number	US-9363059-B2
Application number	US-201113071519-A
Country	US
Kind code	B2
Filing date	Mar 25, 2011
Priority date	Apr 2, 2010
Publication date	Jun 7, 2016
Grant date	Jun 7, 2016

Abstract

A method of handling component carrier activation and deactivation for a mobile device capable of receiving and transmitting on a plurality of component carriers in a wireless communication system is disclosed. The method includes starting a deactivation timer for a component carrier of the plurality of component carriers when the component carrier is activated, wherein the deactivation timer provides a period of time for component carrier activation, performing a Hybrid Automatic Repeat Request (HARQ) process on the component carrier, and extending activation time of the component carrier when a retransmission of the HARQ process is not finished before deactivation of the component carrier.

First claim

What is claimed is:

1. A method of handling component carrier activation and deactivation for a mobile device capable of receiving and transmitting on a plurality of component carriers in a wireless communication system, the method comprising:
starting a deactivation timer for a component carrier of the plurality of component carriers when the component carrier is activated, wherein the deactivation timer provides a period of time for component carrier activation;
starting a prohibit timer for the component carrier when the deactivation timer is started or restarted, wherein the prohibit timer provides a period of time during which the mobile device does not restart the deactivation timer for the component carrier;
performing a Hybrid Automatic Repeat Request (HARQ) process on the component carrier; and
extending activation time of the component carrier when a retransmission of the HARQ process is not finished before deactivation of the component carrier and the prohibit timer expires.

2. The method of claim 1 , wherein performing the HARQ process on the component carrier comprises:
receiving a HARQ feedback corresponding to an uplink transmission on the component carrier;
wherein extending activation time of the component carrier when the retransmission of the HARQ process is not finished before deactivation of the component carrier comprises:
restarting or starting an extension timer for the component carrier when the HARQ process retransmission is not finished before deactivation of the component carrier and the HARQ feedback is received, wherein the extension timer is the deactivation timer or is a specific timer used for providing a period time for component carrier activation.

3. The method of claim 2 , wherein restarting or starting the extension timer for the component carrier when the HARQ process retransmission is not finished before deactivation of the component carrier and the HARQ feedback is received comprises:
restarting or starting the extension timer for the component carrier when the HARQ process retransmission is not finished before deactivation of the component carrier, the HARQ feedback is received and the prohibit timer expires.

4. The method of claim 2 , further comprising:
deactivating the component carrier when at least one of the deactivation timer expires, the extension timer expires, and a signaling for component carrier deactivation is received from a network of the wireless communication system; and
performing at least one of the following steps:
stopping the deactivation timer or the extension timer;
flushing a HARQ buffer corresponding to the HARQ process;
stopping or releasing Physical Uplink Control Channel (PUCCH) or Sounding Reference Signal (SRS) on the component carrier;
clearing any configured downlink assignment and uplink grant on the component carrier;
stopping CQI/PMI/RI reporting for the component carrier; and
stopping PDCCH monitoring for the component carrier.

5. The method of claim 1 , wherein performing the HARQ process on the component carrier comprises:
starting a HARQ round trip time (RTT) timer for the component carrier when a downlink transmission is received on the component carrier, wherein the HARQ process retransmission is not received during duration of the HARQ RTT timer;
wherein extending activation time of the component carrier when the retransmission of the HARQ process is not finished before deactivation of the component carrier comprises:
restarting or starting an extension timer for the component carrier when the HARQ process retransmission is not finished before deactivation of the component carrier and the HARQ RTT timer expires, wherein the extension timer is the deactivation timer or is a specific timer used for providing a period time for component carrier activation; or
restarting or starting the extension timer for the component carrier when the HARQ process retransmission is not finished before expiry of the deactivation timer and the HARQ RTT timer is started, wherein the extension timer is the deactivation timer or is a specific timer used for providing a period time for component carrier activation.

6. The method of claim 5 , further comprising:
deactivating the component carrier when at least one of the deactivation timer expires, the extension timer expires, and a signaling for component carrier deactivation is received from a network of the wireless communication system; and
performing at least one of the following steps:
stopping the deactivation timer or the extension timer;
flushing a HARQ buffer corresponding to the HARQ process;
stopping or releasing Physical Uplink Control Channel (PUCCH) or Sounding Reference Signal (SRS) on the component carrier;
clearing any configured downlink assignment and uplink grant on the component carrier;
stopping CQI/PMI/RI reporting for the component carrier; and
stopping PDCCH monitoring for the component carrier.

7. The method of claim 5 ,
wherein restarting or starting the extension timer for the component carrier when the HARQ process retransmission is not finished before deactivation of the component carrier and the HARQ RTT timer expires comprises:
restarting or starting the extension timer for the component carrier when the HARQ process retransmission is not finished before deactivation of the component carrier, the HARQ RTT timer expires and the prohibit timer expires; or

wherein restarting or starting the extension timer for the component carrier when the HARQ process retransmission is not finished before deactivation of the component carrier and the HARQ RTT timer is started comprises:
restarting or starting the extension timer for the component carrier when the HARQ process retransmission is not finished before deactivation of the component carrier, the HARQ RTT timer is started, and the prohibit timer expires.

8. A method of handling component carrier activation and deactivation for a mobile device capable of receiving and transmitting on a plurality of component carriers in a wireless communication system, the method comprising:
starting a deactivation timer for a component carrier of the plurality of component carriers when the component carrier is activated, wherein the deactivation timer provides a period of time for component carrier activation;
starting a prohibit timer for the component carrier when the deactivation timer is started or restarted, wherein the prohibit timer provides a period of time during which the mobile device does not restart the deactivation timer for the component carrier;
initiating a scheduling request (SR) procedure; and
extending activation time of the component carrier when an uplink resource corresponding to the SR procedure is not received before deactivation of the component carrier and the prohibit timer expires.

9. The method of claim 8 , wherein extending activation time of the component carrier when the uplink resource corresponding to the SR procedure is not received before deactivation of the component carrier comprises:
restarting or starting an extension timer for the component carrier when the uplink resource corresponding to the SR procedure is not received before deactivation of the component carrier, wherein the extension timer is the deactivation timer or is a specific timer used for providing a period time for component carrier activation.

10. The method of claim 9 , further comprising:
deactivating the component carrier when at least one of the deactivation timer expires, the extension timer expires, and a signaling for component carrier deactivation is received from a network of the wireless communication system; and
performing at least one of the following steps:
stopping the deact

Assignees

• Wang Chun-Yen
• Lin Tzu-Ming
• Acer Inc

Inventors

• Wang Chun-Yen
• Lin Tzu-Ming

Classifications

• H04L5/0055

  Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861) · CPC title

• H04L1/1874

  Buffer management · CPC title

• H04L1/1887

  Scheduling and prioritising arrangements · CPC title

• H04L5/0051 Primary

  of dedicated pilots, i.e. pilots destined for a single user or terminal · CPC title

• H04W76/068

  Electricity · mapped topic