Method and Apparatus for Handling Physical Downlink Control Channel Orders in Wireless Communication System

• US 20110019619A1
• Filed: 07/23/2010
• Published: 01/27/2011
• Est. Priority Date: 07/23/2009
• Status: Active Grant

• Current Assignee: Innovative Sonic Limited
• Original Assignee: Innovative Sonic Limited
• Inventors: Tseng, Li-Chih
• Granted Patent: US 8,665,822 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method for handling physical downlink control channel (PDCCH) orders in a user equipment (UE) of a wireless communication system is disclosed. The wireless communication system supports Carrier Aggregation, which enables the UE to perform transmission and/or reception through multiple carriers. The method includes steps of configuring a plurality of carriers, receiving a PDCCH order, and using a specific carrier within the plurality of carriers to trigger a random access procedure according to the PDCCH order.

Claims

1. A method for handling physical downlink control channel (PDCCH) orders in a user equipment (UE) of a wireless communication system, the wireless communication system supports Carrier Aggregation (CA), which enables the UE to perform transmission and/or reception through multiple carriers, the method comprising:

configuring a plurality of carriers;

receiving a PDCCH order; and

using a specific carrier within the plurality of carriers to trigger a random access (RA) procedure according to the PDCCH order.

2. The method of claim 1, wherein receiving the PDCCH order is receiving the PDCCH order through a downlink carrier within the plurality of carriers.

3. The method of claim 2, wherein the specific carrier is an uplink carrier within the plurality of carriers corresponding to the downlink carrier.

4. The method of claim 1, wherein the PDCCH order comprises a carrier information, and the carrier information indicates the UE to use the specific carrier to trigger the RA procedure.

5. The method of claim 1, wherein the RA procedure is utilized for uplink synchronization.

6. A communication device for handling PDCCH orders in a user equipment (UE) of a wireless communication system, the wireless communication system supports Carrier Aggregation (CA), which enables the UE to perform transmission and/or reception through multiple carriers, the communication device comprising:

a processor for executing a program; and

a memory coupled to the processor for storing the program;

wherein the program comprises;

configuring a plurality of carriers;

receiving a PDCCH order; and

using a specific carrier within the plurality of carriers to trigger a random access (RA) procedure according to the PDCCH order.

7. The communication device of claim 6, wherein receiving the PDCCH order in the program is receiving the PDCCH order through a downlink carrier within the plurality of carriers.

8. The communication device of claim 7, wherein the specific carrier is an uplink carrier within the plurality of carriers corresponding to the downlink carrier.

9. The communication device of claim 6, wherein the PDCCH order comprises a carrier information, and the carrier information indicates the UE to use the specific carrier to trigger the RA procedure.

10. The communication device of claim 6, wherein the RA procedure is utilized for uplink synchronization.

11. A method for handling physical downlink control channel (PDCCH) orders in a network terminal of a wireless communication system, the wireless communication system supports Carrier Aggregation (CA), which enables a user equipment (UE) to perform transmission and/or reception through multiple carriers, the method comprising:

configuring a plurality of carriers for the UE;

generating a carrier information; and

including the carrier information in a PDCCH order, and transmitting the PDCCH order to the UE;

wherein the PDCCH order is utilized for indicating the UE to trigger a random access (RA) procedure, and the carrier information is utilized for indicating the UE to use a specific carrier within the plurality of carriers to trigger the RA procedure.

12. The method of claim 11, wherein the specific carrier is utilized for uplink transmission.

13. The method of claim 11, wherein the RA procedure is utilized for uplink synchronization.

14. A communication device for handling PDCCH orders in network terminal of a wireless communication system, the wireless communication system supports Carrier Aggregation (CA), which enables a user equipment (UE) to perform transmission and/or reception through multiple carriers, the communication device comprising:

a processor for executing a program; and

a memory coupled to the processor for storing the program;

wherein the program comprises;

configuring a plurality of carriers for the UE;

generating a carrier information; and

including the carrier information in a PDCCH order, and transmitting the PDCCH order to the UE;

wherein the PDCCH order is utilized for indicating the UE to trigger a random access (RA) procedure, and the carrier information is utilized for indicating the UE to use at least one specific carrier within the plurality of carriers to trigger the RA procedure.

15. The communication device of claim 14, wherein the specific carrier is utilized for uplink transmission.

16. The communication device of claim 14, wherein the RA procedure is utilized for uplink synchronization.