METHOD FOR ALLOCATING RESOURCES FOR DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM AND DEVICE FOR SAME

• US 20150036616A1
• Filed: 03/28/2013
• Published: 02/05/2015
• Est. Priority Date: 03/28/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Seungmin, Kim, Hakseong, Seo, Hanbyul, Kim, Myoungseob, Seo, Inkwon
• Granted Patent: US 9,374,813 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A method for allocating resources for a downlink control channel by a base station in a wireless communication system is disclosed. Specifically, the method comprises the steps of: mapping resource elements to resource element groups for each of resource blocks; forming control channel elements by using a predetermined number of resource element groups from among the resource element groups; and allocating control channel elements of a number corresponding to an aggregation level of the downlink control channel as resources for the downlink control channel, wherein the number of available resource elements included in each of the resource element groups or the number of available resource elements included in each of the control channel elements of a number corresponding to the aggregation level is uniform.

Claims

1. A method for allocating a resource for a downlink control channel by a base station (BS) in a wireless communication system, the method comprising:

performing mapping resource elements and resource element groups to each of resource blocks;

configuring control channel elements using a predetermined number of resource element groups among the resource element groups; and

allocating control channel elements, the number of which corresponds to an aggregation level of the downlink control channel, as a resource for the downlink control channel,

wherein the number of available resource elements included in each of the resource element groups or the number of available resource elements included in each of the control channel elements, the number of which corresponds to the aggregation level, is equivalent.

2. The method according to claim 1, wherein the number of resource elements for a reference signal included in each of the resource element groups is changed according to a type of a subframe in which the downlink control channel is transmitted.

3. The method according to claim 1, wherein the number of resource elements for a reference signal included in each of the resource element groups is changed based on configuration of one or more reference signals configured for each of the resource blocks.

4. The method according to claim 1, wherein the control channel elements, the number of which corresponds to the aggregation level, are included in different resource blocks.

5. The method according to claim 1, wherein the predetermined number is determined according to a type of a subframe in which the downlink control channel is transmitted.

6. The method according to claim 1, wherein the performing comprises:

performing specific resource element group indexing on resource elements of a symbol in which a reference signal is configured; and

performing the specific resource element group indexing using a predetermined offset on resource elements of a symbol in which a reference signal is not configured.

7. The method according to claim 6, wherein the predetermined offset is increased or reduced in a unit of a specific value as a symbol index is increased.

8. The method according to claim 6, wherein the specific resource element group indexing is changed based on a resource block index.

9. The method according to claim 1, further comprising puncturing a resource element for a reference signal for the downlink control channel.

10. The method according to claim 1, further comprising rate-matching the downlink control channel so as to correspond to resources for the downlink control channel, obtained by excluding a resource element for a reference signal.