Method and apparatus for performing cross-carrier scheduling for SPS

• US 9,319,205 B2
• Filed: 03/10/2011
• Issued: 04/19/2016
• Est. Priority Date: 03/17/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Ahn, Joon Kui, Han, Seung Hee, Noh, Min Seok, Kim, Min Gyu, Chung, Jae Hoon, Moon, Sung Ho, Yang, Suck Chel, Seo, Dong Youn, Kim, So Yeon
• Primary Examiner(s): Yao, Kwang B
• Assistant Examiner(s): Chowdhury, Harun
• Application Number:
  US13/634,481
• Publication Number:
  US 20130058291A1
• Time in Patent Office: 1,867 Days
• Field of Search: 370/252, 370/328, 370/329, 370/336, 455/434, 714/751
• US Class Current: 1/1
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 84/047 using dedicated repeater stations

Abstract

The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus in which a base station transmits a signal to a relay in a wireless communication system. A method in which a terminal receives a downlink signal in a wireless communication system that supports carrier aggregation comprises: a step of receiving, on a first carrier, a physical downlink control channel (PDCCH) having no carrier indication information; and a step of receiving a physical downlink shared channel (PDSCH) using the scheduling information carried on the PDCCH, wherein the PDSCH is received on the first carrier in the event the PDCCH is a non-semi-persistent scheduling (SPS) PDCCH, and the PDSCH is received on a second carrier different from the first carrier in the event the PDCCH is an SPS PDCCH.

Claims

1. A method of receiving a downlink signal by a user equipment (UE) in a carrier aggregation supportive wireless communication system, the method comprising:

receiving a semi-persistent scheduling (SPS) physical downlink control channel (PDCCH) having no carrier indication (CI) information via a first carrier among a plurality of carriers,

determining whether or not a SPS retransmission is in progress, and

if the SPS retransmission is not in progress on all of the plurality of carriers, reactivating a SPS transmission on a second carrier on which the SPS transmission has been performed most recently among the plurality of carriers,

wherein the second carrier is different from the first carrier which carries the SPS PDCCH.

2. The method of claim 1, further comprising:

if the SPS retransmission is in progress on a third carrier different from the first carrier which carries the SPS PDCCH, reactivating the SPS transmission on the third carrier.

3. A user equipment configured to receive a downlink signal in a carrier aggregation supportive wireless communication system, the user equipment comprising:

means for receiving a semi-persistent scheduling (SPS) physical downlink control channel (PDCCH) having no carrier indication (CI) information via a first carrier among a plurality of carriers,

means for determining whether or not a SPS retransmission is in progress, and

means for reactivating a SPS transmission on a second carrier on which the SPS transmission has been performed most recently among the plurality of carriers, if the SPS retransmission is not in progress on all of the plurality of carriers,

wherein the second carrier is different from the first carrier which carries the SPS PDCCH.

4. The user equipment of claim 3, further comprising:

means for reactivating the SPS transmission on a third carrier if the SPS retransmission is in progress on the third carrier different from the first carrier which carries the SPS PDCCH.