Method and apparatus for transmitting HARQ acknowledgement in OFDM radio communication system
A Physical Hybrid Automatic Repeat reQuest (ARQ) Indicator CHannel (PHICH) transmission method performed by a base station is provided. The method includes determining whether any PHICH resources are allocated to a current subframe; allocating, upon a determination that the current subframe does not have any PHICH resources allocated, a new PHICH resource; and transmitting a PHICH through the allocated new PHICH resource.
1. A Physical Hybrid Automatic Repeat reQuest (HARQ) Indicator CHannel (PHICH) transmission method performed by a base station, comprising:
receiving two or more physical Uplink Shared Channels (PUSCHs) from a User Equipment (UE) using two or more carriers, the two or more PUSCHs corresponding to different Time Division Duplexing (TDD) configurations;
generating two or more HARQ response information corresponding to the two or more PUSCHs;
determining whether a PHICH resource is allocated to each current subframe, based on the TDD configurations;
allocating a new PHICH resource at a current subframe to which the PHICH resource is not allocated; and
transmitting the PHICHs through the allocated PHICH resources for the two or more HARQ response information.
2. The PHICH transmission method of claim 1 , wherein allocating the new PHICH resource includes configuring, as the allocated new PHICH resource, a resource that is allocated for a Physical Downlink Control Channel (PDCCH) but that is not used for PDCCH transmission.
3. The PHICH transmission method of claim 1 , wherein allocating the new PHICH resource includes configuring, as the allocated new PHICH resource, a region immediately following a common control channel transmission region.
4. The PHICH transmission method of claim 1 , wherein allocating the new PHICH resource includes configuring a part of a terminal-specific control channel as the allocated new PHICH resource.
5. A Physical Hybrid Automatic Repeat reQuest (HARQ) Indicator CHannel (PHICH) reception method performed by a terminal, comprising:
transmitting two or more physical Uplink Shared Channels (PUSCHs) using two or more carriers, the two or more PUSCHs corresponding to different Time Division Duplexing (TDD) configurations;
determining whether a PHICH resource is allocated to each current subframe, based on the TDD configurations;
identifying a new PHICH resource at a current subframe to which the PHICH resource is not allocated; and
receiving the PHICHs through the allocated and identified PHICH resources for the two or more HARQ response information.
6. The PHICH reception method of claim 5 , wherein the new PHICH resource includes a resource that is allocated for a Physical Downlink Control CHannel (PDCCH) but that is not used for PDCCH transmission.
7. The PHICH reception method of claim 5 , wherein the new PHICH resource includes a region immediately following a common control channel transmission region.
8. The PHICH reception method of claim 5 , wherein the new PHICH resource includes a part of a terminal-specific control channel.
9. A base station for transmitting a Physical Hybrid Automatic Repeat reQuest (HARQ) Indicator CHannel (PHICH), the base station comprising:
a controller configured to:
receive two or more physical Uplink Shared Channels (PUSCHs) from a User Equipment (UE) using two or more carriers, the two or more PUSCHs corresponding to different Time Division Duplexing (TDD) configurations;
generate two or more HARQ response information corresponding to the two or more PUSCHs; and
determine whether a PHICH resource is allocated to each current subframe, based on the TDD configurations;
a selector configured to allocate a new PHICH resource at a current subframe to which the PHICH resource is not allocated; and
a transmitter configured to transmit the PHICHs through the allocated PHICH resources for the two or more HARQ response information.
10. The base station of claim 9 , wherein the selector configures, as the PHICH resource, a resource that is allocated for a Physical Downlink Control CHannel (PDCCH) but not used for PDCCH transmission, or a resource that has a lowest probability of PDCCH transmission.
11. The base station of claim 9 , wherein the selector configures, as the PHICH resource, a region that immediately follows a common control channel transmission region.
12. The base station of claim 9 , wherein the selector configures a part of a terminal-specific control channel as the PHICH resource.