Method and device for allocating radio resources in wireless portable network system

• US 7,551,937 B2
• Filed: 07/16/2004
• Issued: 06/23/2009
• Est. Priority Date: 07/18/2003
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute, KT Corporation, Samsung Electronics Co. Ltd., Hanaro Telecom., Inc. (SK Telecom Co., Ltd.), SK Telecom Co., Ltd.
• Original Assignee: Electronics and Telecommunications Research Institute, KT Corporation, KT Freetel Co., Ltd. (KT Corporation), Samsung Electronics Co. Ltd., Hanaro Telecom., Inc. (SK Telecom Co., Ltd.), SK Telecom Co., Ltd.
• Inventors: Eom, Kwang-Seop, Cho, Jae-hee, Kim, Jae-Heung, Hwang, Seung-Ku, Yoon, Chul-Sik, Shin, Seok-Joo, Cho, Min-hee, Lim, Soon-Yong, Song, Boong-Gee, Yeo, Kun-Min, Ryu, Byung-Han
• Primary Examiner(s): Kincaid, Lester
• Assistant Examiner(s): DOAN, PHUOC HUU
• Application Number:
  US10/565,010
• Publication Number:
  US 20070010268A1
• Time in Patent Office: 1,803 Days
• Field of Search: None
• US Class Current: 455/509
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• 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 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/0219 where the power saving management affects multiple terminals
• CPC Class Codes: H04W 72/00 Local resource management
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Information for different subscribers of a service with the same modulation and channel encoding method is transmitted by allocating radio resources in a wireless portable Internet system. Also, identifier information on the subscriber of a concurrently allocated radio resource is transmitted through common control information. Therefore, information for a plurality of subscribers coexists in a single radio resource block, and it can be easily transmitted. Since a subscriber station which has received downlink information can know to which radio resource block the information for the corresponding station is allocated through the subscriber identifier information transmitted as common control information, the subscriber station can access desired information by accessing a specific radio resource block to which information for the subscriber is allocated in the received frame.

Claims

1. A method for a base station to transmit allocation information of downlink radio resource to a subscriber terminal in an OFDMA (Orthogonal Frequency Division Multiple Access) communication system, the method comprising:

mapping, to a first region of a common control information of the downlink radio resource, allocation information for at least one subscriber terminal corresponding to a second region of the radio resource in a downlink frame composed of a predetermined number of symbols and a predetermined number of subchannels; and

transmitting the common control information to the at least one subscriber terminal in a time duration of the downlink frame;

wherein the allocation information includes;

at least one identifier for the at least one subscriber terminal and a number of the at least one subscriber terminal; and

symbol offset information and subchannel offset information indicating a two-dimensional position of the second region in the downlink frame.

2. The method of claim 1, further comprising mapping the symbol offset information and the subchannel offset information of the second region of the radio resource to the common control information of the downlink radio resource.

3. The method of claim 1, further comprising mapping the modulation and channel encoding information of the radio resource to the common control information of the downlink radio resource.

4. The method of claim 1, wherein when the downlink frame includes a plurality of the second regions, allocation information for at least one subscriber terminal corresponding to one of the second regions is mapped to the first region and allocation information for at least one subscriber terminal corresponding to the rest of the second regions is not mapped to the first region.

5. A method for a subscriber terminal to access a downlink radio resource in an OFDMA (Orthogonal Frequency Division Multiple Access) communication system, the method comprising:

receiving a common control information including a plurality of allocation information for a plurality of radio resource blocks in a downlink frame composed of a predetermined number of symbols and a predetermined number of subchannels, wherein each of the plurality of allocation information includes at least one identifier for at least one subscriber terminal and a number of the at least one subscriber terminal, and symbol offset information and subchannel offset information indicating a two-dimensional position of a radio resource block in the downlink frame;

searching allocation information corresponding to an identifier of the subscriber terminal among the plurality of allocation information; and

accessing a radio resource block by using symbol offset information and subchannel offset information corresponding to the searched allocation information among the plurality of radio resource blocks.

6. The method of claim 5, wherein one of the plurality of radio resource blocks corresponding to the at least one allocation information is allocated to the at least one subscriber terminal.

7. The method of claim 6, wherein the at least one allocation information further comprises modulation and channel encoding information of the corresponding radio block.

8. The method of claim 5, wherein the common control information includes a plurality of allocation information for a part of the plurality of radio resource blocks and does not include allocation information for the rest of the plurality of radio resource blocks.

9. The method of claim 8, further comprising accessing the rest of the plurality of radio resource blocks and determining whether the identifier corresponding to the subscriber terminal is included therein,

wherein the searching allocation information including the identifier corresponding to the subscriber terminal among the plurality of allocation information for the part of the plurality of radio resource blocks.

10. An apparatus for transmitting allocation information of downlink radio resource to a subscriber terminal in an OFDMA (Orthogonal Frequency Division Multiple Access) communication system, the apparatus comprising:

means for mapping, to a first region of a common control information block of the downlink radio resource, an allocation information for at least one subscriber terminal corresponding to a second region of the radio resource in a downlink frame composed of a predetermined number of symbols and a predetermined number of subchannels; and

means for transmitting the common control information block to the at least one subscriber terminal in a time duration of the downlink frame;

wherein the allocation information includes;

at least one identifier for the at least one subscriber terminal and the number of the at least one subscriber terminal; and

symbol offset information and subchannel offset information indicating a two-dimensional position of the second region in the downlink frame.

11. The apparatus of claim 10, further comprising means for mapping the symbol offset information and the subchannel offset information of the second region to the first region in the downlink frame.

12. The apparatus of claim 10, further comprising means for mapping modulation and channel encoding information of the radio resource to the first region in the downlink frame.

13. The method of claim 10, wherein when the downlink frame includes a plurality of the second regions, allocation information for at least one subscriber terminal corresponding to a part of the second regions is mapped to the first region and allocation information for at least one subscriber terminal corresponding to the rest of the second regions is not mapped to the first region.

14. A method for a base station to generate downlink frame in an OFDMA (Orthogonal Frequency Division Multiple Access) communication system, the method comprising:

allocating a radio resource block to the frame;

allocating a common control information block to the frame;

determining whether to map, to the common control information block, allocation information for at least one subscriber terminal corresponding to the radio resource block in a downlink frame composed of the predetermined number of symbols and the predetermined number of subchannels; and

mapping, to the common control information block, at least one identifier for the at least one subscriber terminal and a number of the at least one subscriber terminal, and symbol offset information and subchannel offset information indicating a two-dimensional position of the radio resource block in the downlink frame when the allocation information for the at least one subscriber terminal is mapped to the common control information block.

15. The method of claim 14, further comprising mapping modulation and channel encoding information of the radio resource to the common control information block in the downlink frame.

16. The method of claim 14, wherein when the downlink frame includes a plurality of radio resource blocks, allocation information for at least one subscriber terminal corresponding to a part of the radio resource blocks is mapped to the common control information block and allocation information for at least one subscriber terminal corresponding to the rest of the radio resource blocks is not mapped to the common control blocks.

17. A method for a base station to generate downlink frame in an OFDMA (Orthogonal Frequency Division Multiple Access) communication system, the method comprising:

allocating a plurality of radio resource blocks including a first radio resource block for at least one first subscriber terminal and a second radio resource block for at least one second subscriber terminal in a downlink frame composed of the predetermined number of symbols and the predetermined number of subchannels;

allocating a common control information block including a plurality of common control information to the frame, the plurality of common information including a first common control information for the first radio resource block and a second common control information for the second radio resource block; and

mapping, to a common control information of the common control information block, an allocation information for the at least one first subscriber terminal corresponding to the first radio resource block in the downlink frame;

wherein the allocation information includes;

at least one identifier for the at least one first subscriber terminal and the number of the at least one first subscriber terminal; and

symbol offset information and subchannel offset information indicating a two-dimensional position of the first radio resource block in the downlink frame.

18. The method of claim 17, wherein an identifier for the at least one second subscriber terminal and the number of the at least one second subscriber terminal are not mapped to the second common control information.

19. The method of claim 17, further comprising mapping modulation and channel encoding information of the first radio resource to the first common control information.