Method and apparatus for transmitting and receiving data in a communication system according to a location of a mobile station

• US 8,259,644 B2
• Filed: 04/04/2008
• Issued: 09/04/2012
• Est. Priority Date: 04/05/2007
• Status: Active Grant

• Current Assignee: Industry Academic Cooperation Foundation, Samsung Electronics Co. Ltd.
• Original Assignee: Industry Academic Cooperation Foundation, Samsung Electronics Co. Ltd.
• Inventors: Choi, Jin-Ghoo, Jung, Sung-Yoon, Yun, Sang-Boh, Kim, Kwang-Soon, Sang, Young-Jin, Kim, Seong-Lyun, Park, Jin-Bae
• Primary Examiner(s): Juntima, Nittaya
• Assistant Examiner(s): HUYNH, KHOA B
• Application Number:
  US12/098,168
• Publication Number:
  US 20080247340A1
• Time in Patent Office: 1,614 Days
• Field of Search: None
• US Class Current: 370/321
• CPC Class Codes: H04W 72/51 based on terminal or device properties

Abstract

A method and apparatus for transmitting and receiving data in a Base Station (BS) of a communication system are provided. A controller determines a location of a Mobile Station (MS), and determines a transmission/reception scheme for data transmission and reception to/from the MS according to the location of the MS. A transceiver transmits and receives data to/from the MS using the determined transmission/reception scheme. Preferably, the MS is located in any one of a cell'"'"'s inner region and a cell'"'"'s outer region, the cell'"'"'s inner region has a radius which varies according to interference between adjacent cells, and the cell'"'"'s outer region is a region defined by excepting the cell'"'"'s inner region from the entire cell region.

Claims

1. A method for transmitting and receiving data by a Base Station (BS) in a communication system, the method comprising:

determining a location of a Mobile Station (MS);

determining a transmission/reception scheme for data transmission and reception to/from the MS according to the location of the MS; and

transmitting and receiving data to/from the MS using the determined transmission/reception scheme;

wherein the MS is located in at least one of a cell'"'"'s inner region and a cell'"'"'s outer region, and further wherein the cell'"'"'s inner region has a radius that is adjusted according to an interference level between adjacent cells and the cell'"'"'s outer region is defined by excepting the cell'"'"'s inner region from the entire cell region,

wherein the determining of the transmission/reception scheme comprises;

when the MS is located in the cell'"'"'s outer region, determining whether the MS transmits and receives a signal using a Relay Station (RS) located in the cell'"'"'s inner region; and

determining the transmission/reception scheme as a time division duplex scheme when the MS transmits and receives a signal using the RS,

wherein a frequency applied to the time division duplex scheme between the MS and the RS is a second frequency, and a frequency applied to the time division duplex scheme between the BS and the RS is a first frequency which is different from the second frequency.

2. The method of claim 1, wherein a frequency reuse factor used in the cell'"'"'s inner region is 1 and a frequency reuse factor used in the cell'"'"'s outer region is less than 1.

3. The method of claim 1, wherein the determining of the transmission/reception scheme comprises:

when the MS is located in the cell'"'"'s inner region, determining the transmission/reception scheme as the time division duplex scheme, and determining a frequency applied to the time division duplex scheme as the first frequency;

wherein the MS located in the cell'"'"'s inner region uses physically consecutive subcarriers.

4. The method of claim 1, further comprising:

when the MS does not transmit and receive a signal using the RS, determining the transmission/reception scheme as a frequency division duplex scheme; and

determining a frequency applied to the frequency division duplex scheme as the first frequency and the second frequency;

wherein the first frequency is used for data transmission to the MS, and the second frequency is used for data reception from the MS.

5. The method of claim 4, wherein the MS, which does not transmit and receive a signal using the RS, uses physically inconsecutive subcarriers.

6. The method of claim 4, wherein a frequency reuse factor of the MS which does not transmit and receive a signal using the RS comprises a value obtained by adaptively controlling a frequency reuse factor of the cell'"'"'s outer region taking into account a ratio of interference between adjacent cells to signal strength of a frequency band currently unused in the cell.

7. The method of claim 1, wherein the transmitting and receiving of data to/from the MS using the determined transmission/reception scheme further comprises:

allocating downlink resources and uplink resources for data transmission and reception to/from the MS by at least one of symmetrically and asymmetrically according to a required amount of resources of the system.

8. An apparatus for transmitting and receiving data in a Base Station (BS) of a communication system, the apparatus comprising:

a controller for determining a location of a Mobile Station (MS), and for determining a transmission/reception scheme for data transmission and reception to/from the MS according to the location of the MS; and

a transceiver for transmitting and receiving data to/from the MS using the determined transmission/reception scheme;

wherein the MS is located in at least one of a cell'"'"'s inner region and a cell'"'"'s outer region, and further wherein the cell'"'"'s inner region has a radius that is adjusted according to an interference level between adjacent cells, and the cell'"'"'s outer region is defined by excepting the cell'"'"'s inner region from the entire cell region,

wherein, when the MS is located in the cell'"'"'s outer region, the controller determines whether the MS transmits and receives a signal using a Relay Station (RS) located in the cell'"'"'s inner region, and determines the transmission/reception scheme as a time division duplex scheme when the MS transmits and receives a signal using the RS, and

wherein a frequency applied to the time division duplex scheme between the MS and the RS is a second frequency, and a frequency applied to the time division duplex scheme between the BS and the RS is a first frequency which is different from the second frequency.

9. The apparatus of claim 8, wherein a frequency reuse factor used in the cell'"'"'s inner region is 1 and a frequency reuse factor used in the cell'"'"'s outer region is less than 1.

10. The apparatus of claim 8, wherein, when the MS is located in the cell'"'"'s inner region, the controller determines the transmission/reception scheme as the time division duplex scheme and determines a frequency applied to the time division duplex scheme as the first frequency;

wherein the MS located in the cell'"'"'s inner region uses physically consecutive subcarriers.

11. The apparatus of claim 8, wherein, when the MS does not transmit and receive a signal using the RS, the controller determines the transmission/reception scheme as a frequency division duplex scheme, and determines a frequency applied to the frequency division duplex scheme as the first frequency and the second frequency;

wherein the first frequency is used for data transmission to the MS, and the second frequency is used for data reception from the MS.

12. The apparatus of claim 11, wherein the MS, which does not transmit and receive a signal using the RS, uses physically inconsecutive subcarriers.

13. The apparatus of claim 11, wherein a frequency reuse factor of the MS which does not transmit and receive a signal using the RS comprises a value obtained by adaptively controlling a frequency reuse factor of the cell'"'"'s outer region taking into account a ratio of interference between adjacent cells to signal strength of a frequency band currently unused in the cell.

14. The apparatus of claim 8, wherein the controller allocates downlink resources and uplink resources for data transmission and reception to/from the MS by at least one of symmetrically and asymmetrically according to a required amount of resources of the system.