Apparatus and method for supporting relay service in a multi-hop relay broadband wireless access communication system

• US 8,040,826 B2
• Filed: 03/05/2007
• Issued: 10/18/2011
• Est. Priority Date: 03/03/2006
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lim, Eun-Taek, Cho, Jae-Weon, Lee, Mi-Hyun, Chang, Young-Bin, Lee, Sung-Jin, Oh, Chang-Yoon, Choi, Joon-Young, Kang, Hyun-Jeong, Joo, Pan-Yuh
• Primary Examiner(s): Chang; Kent
• Assistant Examiner(s): Eisner; Ronald
• Application Number:
  US11/714,085
• Publication Number:
  US 20070217367A1
• Time in Patent Office: 1,688 Days
• Field of Search: 455/427, 455/431, 455 7- 25, 370/316, 370/492, 370/279, 370/315, 370/501, 370/293, 370/502, 370/276
• US Class Current: 370/293
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04W 36/04 Reselecting a cell layer in multi-layered cells
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 84/047 using dedicated repeater stations
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

An apparatus and method for configuring a subframe to support a relay service in a multi-hop relay BWA communication system are provided, in which a first zone of a subframe is configured for at least one of communication between a BS and a first MS within the coverage area of the BS and communication between at least one RS and a second MS within the coverage area of the at least one RS, and a second zone of the subframe is configured for at least one of communication between the BS and the at least one RS and communication between the at least one RS and another RS.

Claims

1. A method for configuring a subframe to support a relay service in a multi-hop relay wireless communication system including at least one Mobile Station (MS), at least one Base Station (BS), and at least one Relay Station (RS), the method comprising:

configuring a BS-MS link subframe for at least one of communication between a BS and a first MS within the coverage area of the BS and an RS-MS link subframe for communication between at least one RS and a second MS within the coverage area of the at least one RS in a first zone of a downlink subframe;

if the wireless communication system includes two hops, configuring a BS-RS link subframe for communication between the BS and the at least one RS in a second zone of the downlink subframe;

if the wireless communication system includes three or more hops, configuring a BS-RS link subframe for communication between the BS and the at least one RS and an RS-RS link subframe for communication between the at least one RS and another RS in the second zone of the downlink subframe;

configuring a BS-MS link subframe for at least one of communication between the BS and the first MS within the coverage area of the BS and an RS-MS link subframe for communication between the at least one RS and the second MS within the coverage area of the at least one RS in a first zone of an uplink subframe;

if the wireless communication system includes two hops, configuring a BS-RS link subframe for communication between the BS and the at least one RS in a second zone of the uplink subframe; and

if the wireless communication system includes three or more hops, configuring a BS-RS link subframe for communication between the BS and the at least one RS and an RS-RS link subframe for communication between the at least one RS and another RS in the second zone of the uplink subframe,

wherein the first zone and the second zone are distinguished in the downlink subframe and uplink subframe by time resource,

wherein the first zone and the second zone are located consecutively in the downlink subframe and uplink subframe,

wherein a guard region is inserted between the first zone and the second zone of the downlink subframe and uplink subframe,

wherein the downlink subframe and the uplink subframe are distinguished by time resources, and

wherein a preamble and a MAP are positioned at a start of the first zone of the downlink subframe.

2. The method of claim 1, wherein the BS-MS link subframe is distinguished from the RS-MS link subframe by one of Frequency Division Multiple Access (FDMA), Spatial Division Multiple Access (SDMA), and Orthogonal Frequency Division Multiple Access (OFDMA).

3. The method of claim 1, wherein the BS-MS subframe and the RS-MS link subframe have the same configuration.

4. The method of claim 1, wherein the at least one RS is one of a primary RS that provides a preamble and a secondary RS that does not provide the preamble.

5. The method of claim 4, wherein if the at least one RS is the secondary RS, the RS-MS link subframe has null in areas for the preamble and MAP.

6. The method of claim 1, wherein the BS-RS link subframe and the RS-RS link subframe are multiplexed by at least one of time division and frequency division.

7. The method of claim 1, wherein the first zone and the second zone of the downlink subframe and uplink subframe have one of fixed lengths and variable lengths according to a service environment.

8. A method for configuring a subframe to support a relay service in a multi-hop relay wireless communication system including at least one Mobile Station (MS), at least one Base Station (BS), and at least one Relay Station (RS), the method comprising:

configuring a BS-MS link subframe for BS-MS communication and an RS-MS link subframe for the RS-MS communication in a first zone of a downlink subframe;

if the wireless communication system includes two hops, configuring a BS-RS link subframe for BS-RS communication in a second zone of the downlink subframe;

if the wireless communication system includes three or more hops, configuring at least one of a BS-RS link subframe for BS-RS communication, an RS-RS link subframe for RS-RS communication, and an RS-MS link subframe for RS-MS communication in the second zone of the downlink subframe;

if the wireless communication system includes two hops, configuring a BS-MS link subframe for BS-MS communication in a third zone of the downlink subframe;

if the wireless communication system includes three or more hops, configuring a BS-MS link subframe for at least one of BS-MS communication and an RS-RS link subframe for RS-RS communication in the third zone of the downlink subframe;

configuring a BS-MS link subframe for BS-MS communication and an RS-MS link subframe for the RS-MS communication in a first zone of an uplink subframe;

if the wireless communication system includes two hops, configuring a BS-RS link subframe for BS-RS communication in a second zone of the uplink subframe;

if the wireless communication system includes three or more hops, configuring at least one of a BS-RS link subframe for BS-RS communication, an RS-RS link subframe for RS-RS communication, and an RS-MS link subframe for RS-MS communication in the second zone of the uplink subframe;

if the wireless communication system includes two hops, configuring a BS-MS link subframe for BS-MS communication in a third zone of the uplink subframe;

if the wireless communication system includes three or more hops, configuring a BS-MS link subframe for at least one of BS-MS communication and an RS-RS link subframe for RS-RS communication in the third zone of the uplink subframe,

wherein the first zone and the second zone and third zone are distinguished in the downlink subframe and uplink subframe by time resource,

wherein the first zone and the second zone and third zone are located consecutively in the downlink subframe and uplink subframe,

wherein the downlink subframe and the uplink subframe are distinguished by time resources, and

wherein a preamble and a MAP are positioned at a start of the first zone of the downlink subframe.

9. The method of claim 8, wherein the BS-MS link subframe is distinguished from the RS-MS link subframe by one of Frequency Division Multiple Access (FDMA), Spatial Division Multiple Access (SDMA), and Orthogonal Frequency Division Multiple Access (OFDMA).

10. The method of claim 8, wherein the BS-MS subframe and the RS-MS link subframe have the same configuration.

11. The method of claim 8, wherein the BS-RS link subframe, the RS-RS link subframe, and the RS-MS link subframe are distinguished by at least one of time division and frequency division.

12. The method of claim 8, wherein the BS-MS link subframe is distinguished from the RS-RS link subframe by at least one of time division and frequency division.

13. The method of claim 8, wherein the first zone, the second zone, and the third zone of the downlink subframe and uplink subframe have one of fixed lengths and variable lengths according to service environment.

14. The method of claim 8, wherein a preamble channel is positioned at one of the start and end of each of the first zone and the second zone of the downlink subframe.

15. A method of a Relay Station (RS) for supporting a relay service in a multi-hop relay wireless communication system including at least one Mobile Station (MS), at least one Base Station (BS), and at least one RS, the method comprising:

performing network entry based on control information received from a higher node and acquiring subframe configuration information for supporting the relay service;

receiving a synchronization channel, control information, and a traffic burst from the higher node in a second zone of a downlink subframe in an n^th frame;

sending a synchronization channel and the received control information and traffic burst to an MS in a first zone of a downlink subframe in an (n+1)^th frame;

receiving a synchronization channel, control information, and a traffic burst from the higher node in a second zone of the downlink subframe in the (n+1)^th frame; and

if the wireless communication system includes three or more hops, communicating with another RS in a second zone of the downlink subframe and an uplink subframe in the (n+1)^th frame,

wherein the subframe configuration information includes information of a downlink subframe and an uplink subframe divided into a first zone and a second zone,

wherein the first zone of the downlink subframe and the uplink subframe includes a BS-MS link subframe and an RS-MS link subframe,

wherein, if the wireless communication system includes two hops, the second zone of downlink subframe and an uplink subframe includes a BS-RS link subframe,

wherein, if the wireless communication system includes three or more hops, the second zone of downlink subframe and an uplink subframe includes a BS-RS link subframe and an RS-RS link subframe,

wherein the first zone and the second zone of the downlink subframe and uplink subframe are distinguished in the downlink subframe and uplink subframe by time resources,

wherein the first zone and the second zone of the downlink subframe and uplink subframe are located consecutively in the downlink subframe and uplink subframe,

wherein the downlink subframe and the uplink subframe are distinguished by time resources,

wherein a preamble and a MAP are positioned at a start of the first zone of the downlink subframe, and

wherein a guard region is inserted between the first zone and the second zone of the downlink subframe and uplink subframe.

16. The method of claim 15, wherein the RS is one of a primary RS that provides the synchronization channel and a secondary RS that does not provide the synchronization channel.

17. The method of claim 16, wherein if the RS is the secondary RS, the RS fills null in areas for the synchronization channel and a control channel.

18. The method of claim 15, wherein the higher node is one of a BS and a higher RS.

19. The method of claim 15, wherein the network entry comprises:

receiving the control information from the higher node in a zone set for the higher node to communicate with an MS according to a predetermined subframe configuration; and

performing the network entry to the higher node based on the received control information.

20. The method of claim 15, wherein the network entry comprises:

receiving the control information from the higher node in a zone set for the higher node to communicate with an RS according to a predetermined subframe configuration; and

performing the network entry to the higher node based on the received control information.