METHOD AND APPARATUS FOR TRANSMITTING DATA ON RELAY COMMUNICATION SYSTEM

• US 20120002598A1
• Filed: 03/11/2010
• Published: 01/05/2012
• Est. Priority Date: 03/17/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Han-Byul, Kim, Byoung-Hoon
• Granted Patent: US 8,982,765 B2
• Time in Patent Office: Days
• US Class Current: 370/315
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels

Abstract

A data transmission method and apparatus using a multi-point cooperative transmission for a backhaul link transmission of a relay communication system. A data transmission method of a base station in a radio relay communication system include: obtaining, by a first BS, first radio resource information scheduled by a neighbor BS with respect to a first relay node (RN) located within the coverage of the first BS; when the first BS has data to be transmitted to the first RN, scheduling the data of the first BS on first radio resource allocated by the neighbor BS; and transmitting, by the first BS, the data of the first BS on the first BS, wherein the first RN is located within an overlapping cell coverage between the first BS and the neighbor BS. Thus, backhaul link transmission efficiency between the BS and the RN in the relay communication system can be improved and an inter-cell interference with respect to a backhaul link can be reduced.

Claims

1. A data transmission method of a BS in a radio relay communication system, the method comprising:

obtaining, by a first BS, first radio resource information scheduled by a neighbor BS with respect to a first relay node (RN) located within the coverage of the first BS;

when the first BS has data to be transmitted to the first RN, scheduling the data of the first BS on first radio resource allocated by the neighbor BS; and

transmitting, by the first BS, the data of the first BS on the first BS,

wherein the first RN is located within an overlapping cell coverage between the first BS and the neighbor BS.

2. The method of claim 1, wherein the radio resource is resource blocks, and the resource blocks are divided into a subframe and a frequency band.

3. The method of claim 2, wherein when data of the neighbor BS is transmitted on a first subframe and a first frequency band, data of the first BS is transmitted on the first subframe and a second frequency band.

4. The method of claim 2, wherein when the data of the neighbor BS is transmitted on the first subframe and the first frequency band, data of the first BS is transmitted on a second first subframe and the first frequency band.

5. The method of claim 2, further comprising:

when the first BS has data to be transmitted to a second RN or macro UE, scheduling, by the first BS, the data of the first BS on second radio resource which has not been allocated by the neighbor BS; and

transmitting, by the first BS, the data, on the second radio resource.

6. The method of claim 2, further comprising:

when the first BS has data to be transmitted to a second RN or macro UE, scheduling, by the first BS, the data of the first BS on first radio resource which has been allocated by the neighbor BS; and

transmitting, by the first BS, the data, on the first radio resource.

7. The method of claim 6, further comprising:

receiving, by the first BS, information regarding inter-cell interference (ICI) generated as the first BS transmits data to the second RN or the macro UE, from is the first RN; and

adjusting a setting of data transmission to the second RN or the macro UE such that ICI with respect to the first RN is minimized based on the received information regarding the ICI.

8. The method of claim 2, wherein the data transmitted by the first BS to the first RN and the data transmitted by the neighbor BS to the first RN do not have a common part.

9. The method of claim 2, wherein the data transmitted by the first BS to the first RN and the data transmitted by the neighbor BS to the first RN are data toward different UEs, respectively.

10. A data transmission method of a relay node (RN) in a radio relay communication system, the method comprising:

obtaining, by the RN, information regarding radio resource scheduled by a first base station (BS) with respect to the RN;

receiving, by the RN, data of the first BS on the radio resource; and

receiving, by the RN, data of a second BS on the radio resource,

wherein the RN may be located within an overlapping cell coverage between the first and second BSs.

11. The method of claim 10, further comprising:

obtaining, by the RN, information regarding radio resource scheduled by the second BS with respect to the RN.

12. The method of claim 10, wherein when the data of the second BS is transmitted on a first subframe and a first frequency band, the data of the first BS is transmitted on the first subframe and a second frequency band.

13. The method of claim 10, wherein when the data of the second BS is transmitted on the first subframe and the first frequency band, the data of the first BS is transmitted on the second subframe and the first frequency band.

14. The method of claim 10, wherein the data transmitted by the first BS to the RN and the data transmitted by the second BS to the RN are data toward different UEs, respectively.

15. A data transmission apparatus in a radio relay communication system, the apparatus comprising:

a controller configured to schedule data, to be transmitted to a relay node (RN), on radio resource allocated by a neighbor data transmission apparatus when the data is to be transmitted to the RN; and

a transceiver configured to obtain information regarding radio resource scheduled by the neighbor data transmission apparatus with respect to the RN, and transmit the data on the radio resource,

wherein the RN is located within an overlapping cell coverage between the data transmission apparatus and the neighbor data transmission apparatus.