Method for allocating control channel

• US 8,848,627 B2
• Filed: 02/27/2009
• Issued: 09/30/2014
• Est. Priority Date: 02/27/2008
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yuk, Young Soo, Kim, Jeong Ki, Lee, Young Seob, Ryu, Ki Seon
• Primary Examiner(s): Vu, Huy D
• Assistant Examiner(s): Nguyen, Bao G
• Application Number:
  US12/919,388
• Publication Number:
  US 20110002293A1
• Time in Patent Office: 2,041 Days
• Field of Search: None
• US Class Current: 370/329
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

A method for allocating a submap is disclosed. The method includes configuring a subframe including one or more resource areas according to a size of the submap, allocating the submap and a control header including subframe configuration information and submap information to the one or more resource areas, and transmitting the control header.

Claims

1. A method for allocating submaps in a wireless access system, the method performed by a base station and comprising:

configuring resource areas according to a size of the submap;

allocating a control header to the resource areas, the control header including subframe information, downlink submap allocation information, and uplink submap allocation information,

wherein the subframe information includes resource unit (RU) distribution information which is selected from a first to a third scheme, the first scheme indicating a distribution ratio between distributed RUs and localized RUs, the second scheme indicating a bitmap of positions of distributed RUs, and the third scheme indicating an index of a predefined RU distribution;

allocating a downlink submap and an uplink submap to the resource areas based on the control header; and

transmitting the control header of the downlink submap and the uplink submap,

wherein the downlink submap and the uplink submap are sequentially allocated to a first symbol column in the resource area configured by symbol columns and subchannel rows, and a remainder of the uplink submap is allocated to a first subchannel row when the whole of the uplink submap is not allocated to the first symbol column.

2. The method according to claim 1, wherein each of the resource areas is configured by control allocation units comprising predetermined resource units.

3. The method according to claim 2, wherein the predetermined resource units are distributed across a total frequency area of the subframe in a predetermined order.

4. The method according to claim 2, wherein the step of allocating further comprises:

rearranging one or more control allocation units included in the one or more resource areas in a predetermined order in a predetermined symbol; and

permuting a predetermined control allocation unit among the one or more control allocation units.

5. The method according to claim 4, wherein the step of rearranging comprises:

changing an allocation sequence of the one or more control allocation units using a predetermined rotation value.

6. The method according to claim 2, wherein the predetermined resource units included in the control allocation unit are located from one another by the number of the resource units in a total frequency area of the subframe.

7. The method according to claim 2, further comprising calculating a total amount of required resources for the downlink submap and the uplink submap in terms of the number of symbols each configured to predetermined subchannels,

wherein if the total amount of required resources for the downlink submap and the uplink submap is less than one symbol, the step of allocating is performed by allocating the control header and the downlink submap to a first control allocation unit in time division multiplexing.

8. The method according to claim 7, wherein the step of allocating further comprises:

allocating the control header and the downlink submap to the first control allocation unit and allocating the uplink submap to a remaining subchannel area of the first control allocation unit.

9. The method according to claim 8, wherein if the whole of the uplink submap is not allocated to the first control allocation unit, the uplink submap is allocated using a second control allocation unit additionally.

10. The method according to claim 1, wherein the uplink submap is allocated to a remaining area after the downlink submap is allocated.

11. The method according to claim 2, wherein the submap information includes information about a number of the control allocation units to which the downlink submap and the uplink submap are allocated.

12. The method according to claim 1, wherein the downlink submap and the uplink submap are sequentially allocated to the first symbol column in a time division multiplexing scheme, and the remainder of the uplink submap is allocated to the first subchannel row in a frequency division multiplexing scheme when the whole of the uplink submap is not allocated to the first symbol column.

13. The method according to claim 1, wherein the submap information includes a first MCS (Modulation and Coding Scheme) information indicating a first MCS of the downlink submap and a second MCS information indicating a second MCS of the uplink submap.

15. The method according to claim 1,

wherein the uplink submap information indicates a number of control allocation units (CAUs) in case of a scalable time division multiplexing scheme;

and

wherein the uplink submap information indicates a position or number of RUs in case of a hybrid time and frequency multiplexing scheme.

14. A method for receiving control channel information in a wireless access system, the method performed by a mobile station and comprising:

receiving a control header allocated to resource areas of a subframe, the control header including subframe information, downlink submap allocation information, and uplink submap allocation information,

wherein the subframe information includes resource unit (RU) distribution information which is selected from a first to a third scheme, the first scheme indicating distribution ratio between distributed RUs and localized RUs, the second scheme indicating a bitmap of positions of distributed RUs, and the third scheme indicating an index of a predefined RU distribution;

receiving a downlink submap and an uplink submap according to the control header; and

transceiving data through the downlink channel and the uplink channel,

wherein the downlink submap and the uplink submap are sequentially allocated to a first symbol column in the resource area configured by symbol columns and subchannel rows, and a remainder of the uplink submap is allocated to a first subchannel row when the whole of the uplink submap is not allocated to the first symbol column.