METHOD AND APPARATUS FOR CONTROLLING INTER-CELL INTERFERENCE OF CONTROL CHANNELS IN OFDM-BASED HIERARCHICAL CELLULAR SYSTEM

• US 20110261769A1
• Filed: 04/25/2011
• Published: 10/27/2011
• Est. Priority Date: 04/26/2010
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: LEE, Ju Ho, JI, Hyoung Ju, CHO, Joon Young
• Application Number:
  US13/093,158
• Publication Number:
  US 20110261769A1
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 16/32 Hierarchical cell structures
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

A method and apparatus for controlling inter-cell interference of control channels of hierarchical cells in a hierarchical cellular system based on Orthogonal Frequency Division Multiplexing (OFDM) are provided. The inter-cell interference control method of a base station in a hierarchical cellular system based on Orthogonal Frequency Division Multiplexing (OFDM) includes transmitting a broadcast channel, including information on an available bandwidth that is a part of an entire bandwidth, to a terminal, transmitting a control channel including data channel allocation information for the entire bandwidth to the terminal, and transmitting a data channel, as informed by the data channel allocation information, to the terminal. The inter-cell interference control method and apparatus support cooperative transmission of hierarchical cells while maintaining both backward compatibility and forward compatibility.

Claims

1. An inter-cell interference control method of a base station in a hierarchical cellular system based on Orthogonal Frequency Division Multiplexing (OFDM), the method comprising:

transmitting a broadcast channel, including information on an available bandwidth that is a part of an entire bandwidth, to a terminal;

transmitting a control channel including data channel allocation information for the entire bandwidth to the terminal; and

transmitting a data channel, as informed by the data channel allocation information, to the terminal.

2. The method of claim 1, wherein the transmitting of the broadcast channel comprises transmitting information on the entire bandwidth in the broadcast channel.

3. The method of claim 1, further comprising transmitting information on the entire bandwidth to the terminal by higher layer signaling.

4. The method of claim 1, wherein the control channel and the data channel of a cell are transmitted in a subframe of which start and end points differ from those of a subframe transmitted by another cell in the hierarchical cellular system.

5. The method of claim 1, wherein the data channel is mapped to a region remaining after allocation of a control channel region in a subframe for a macro cell in the hierarchical cellular system.

6. A method for receiving control and data channels of a terminal in a hierarchical cellular system based on Orthogonal Frequency Division Multiplexing (OFDM), the method comprising:

receiving a broadcast channel including information on an available bandwidth that is a part of an entire bandwidth;

receiving a control channel including data channel allocation information for the entire bandwidth; and

receiving a data channel according to the data channel allocation information.

7. The method of claim 6, wherein the receiving of the broadcast channel comprises receiving information on the entire bandwidth from a base station via the broadcast channel.

8. The method of claim 6, further comprising receiving information on the entire bandwidth from a base station by higher layer signaling.

9. The method of claim 6, wherein the control channel and the data channel of a cell are received in a subframe of which start and end points differ from those of a subframe transmitted by another cell in the hierarchical cellular system.

10. The method of claim 6, where the data channel is mapped to a region remaining after allocation of a control channel region in a subframe for a macro cell in the hierarchical cellular system.

11. A base station for controlling inter-cell interference in a hierarchical cellular system based on Orthogonal Frequency Division Multiplexing (OFDM), the base station comprising:

a controller for generating a broadcast channel including information on an available bandwidth that is a part of an entire bandwidth, a control channel including data channel allocation information for the entire bandwidth, and a data channel based on the data channel allocation information; and

a transceiver for transmitting the broadcast channel, the control channel, and the data channel to a User Equipment (UE).

12. The base station of claim 11, wherein the controller controls the transceiver to transmit information on the entire bandwidth in the broadcast channel.

13. The base station of claim 11, wherein the controller controls the transceiver to transmit information on the entire bandwidth by higher layer signaling.

14. The base station of claim 11, wherein the control channel and the data channel of a cell are transmitted in a subframe of which start and end points differ from those of a subframe transmitted by another cell in the hierarchical cellular system.

15. The base station of claim 11, wherein the data channel is mapped to a region remaining after allocation of a control channel region in a subframe for a macro cell in the hierarchical cellular system.

16. A terminal for receiving control and data channels in a hierarchical cellular system based on Orthogonal Frequency Division Multiplexing (OFDM), the terminal comprising:

a transceiver for receiving the control and data channels transmitted by a base station; and

a controller for receiving and processing a broadcast channel including information on an available bandwidth that is a part of an entire bandwidth, a control channel including data channel allocation information for the entire bandwidth, and a data channel according to the data channel allocation information.

17. The terminal of claim 16, wherein the controller controls the transceiver to receive information on the entire bandwidth from a base station via the broadcast channel.

18. The terminal of claim 16, wherein the controller controls the transceiver to receive information on the entire bandwidth from a base station by higher layer signaling.

19. The terminal of claim 16, wherein the control and data channels of a cell are received in a subframe of which start and end points differ from those of a subframe transmitted by another cell in the hierarchical cellular system.

20. The terminal of claim 16, wherein the data channel is mapped to a region remaining after allocation of a control channel region in a subframe for a macro cell in the hierarchical cellular system.