Method of transmitting control signal in wireless communication system
A method of transmitting control signals in a wireless communication system includes transmitting a first control signal via a control channel region comprising a plurality of tiles composed of a plurality of subcarriers contiguous in a frequency domain on a plurality of OFDM symbols in a time domain, and transmitting a second control signal via the control channel region, wherein the plurality of tiles included in the control channel region are distributedly or contiguously disposed within a basic range of the control channel region, a range within which the plurality of tiles are distributed in the time domain. Control channel regions can be configured in various manners, so control signals can be adaptively transmitted in various channel environments.
1. A method of transmitting control signals in a wireless communication system, the method comprising:
spreading a first control signal with a first orthogonal code to generate a first spread control signal;
spreading a second control signal with a second orthogonal code, different from the first orthogonal code, to generate a second spread control signal; and
transmitting the first spread control signal and the second spread control signal in a control channel region;
wherein the control channel region comprises a plurality of tiles includes 4 subcarriers by 3 orthogonal frequency division multiplexing (OFDM) symbols;
wherein the plurality of tiles are divided into a first set of tiles and a second set of tiles, and the first set of tiles is disposed in preceding 3 OFDM symbols and the second set of tiles is disposed in 3 OFDM symbols next to the preceding 3 OFDM symbols; and
wherein tiles in the first set are not contiguous with each other in frequency domain and tiles in the second set are not contiguous with each other in frequency domain.
2. The method of claim 1 , wherein the control channel region is disposed in an uplink frame.
3. The method of claim 1 , wherein the control channel region is disposed in a downlink frame.
4. The method of claim 1 , wherein the control channel region is transmitted via a MAP, an FCH, or a broadcast channel.
5. A wireless device configured to transmit control signals in a wireless communication system, the wireless device comprising a processor configured to:
spread a first control signal with a first orthogonal code to generate a first spread control signal;
spread a second control signal with a second orthogonal code, different from the first orthogonal code, to generate a second spread control signal; and
transmit the first spread control signal and the second spread control signal in a control channel region;
wherein the control channel region comprises a plurality of tiles includes 4 subcarriers by 3 orthogonal frequency division multiplexing (OFDM) symbols;
wherein the plurality of tiles are divided into a first set of tiles and a second set of tiles, and the first set of tiles is disposed in preceding 3 OFDM symbols and the second set of tiles is disposed in 3 OFDM symbols next to the preceding 3 OFDM symbols; and
wherein tiles in the first set are not contiguous with each other in frequency domain and tiles in the second set are not contiguous with each other in frequency domain.