Apparatus and method for transmitting/receiving signal in a communication system

A method for receiving a signal by a first mobile station (MS) in a communication system, the method comprising:

• receiving a quasi-dedicated control channel (QDCCH) allocation from a base station (BS);
• if there is data to transmit to the BS, determining whether the QDCCH is allocated as a temporary uplink channel (TULCH), to another MS different from the first MS;
• and
• if it is determined that the QDCCH is allocated to the first MS itself, transmitting the data to the base station using the QDCCH,
• wherein the QDCCH is temporarily allocated to the another MS for a preset time when the first MS does not need to use the QDCCH,
• wherein the preset time is set within a bound satisfying at least one of a maximum allowable delay time of the first MS and a quality-of-service (QoS) of a service received by the first MS,
• wherein the QDCCH is used for one of Channel Quality Information Channel (CQICH) allocation and uplink resource allocation for at least one service to require data transmission over an uplink,
• wherein the preset time excludes a Channel Quality Information (CQI) feedback period for which the MS feeds back CQI, if the QDCCH is used to the CQICH allocation, and the preset excludes an interval in which the MS transmits a request for the uplink resources allocation to the BS, if QDCCH is used to the uplink resources allocation,
• wherein the step of determining whether the ODCCH is allocated to another MS comprises determining that the QDCCH is allocated to the another MS, when information indicating that the ODCCH is allocated to the another MS is received from the BS, and
• wherein a maximum number of QDDCHs allocable as the TULCH is determined based on a total number of ODCCHs allocated by the BS and a session access delay value of each MS, which receiving service from the BS.

A base station (BS) for a communication system, the base station comprising:

• a controller for allocating a quasi-dedicated control channel (QDCCH) to a first mobile station (MS), and temporarily allocating the QDCCH as a temporary uplink channel (TULCH), to a second MS for a preset time when the first MS does not need to use the QDUCH;
• a sub-channel allocator for temporarily allocating the QDCCH to one of the first MS and the second MS according to a control signal from the controller;
• and
• a transmitter for transmitting information indicating the allocation of the QDCCH to the second MS, to the first MS and the second MS, after temporarily allocating the QDCCH to the second MS,
• wherein the preset time is set within a bound satisfying at least one of a maximum allowable delay time of the first MS and a quality-of-service (QoS) of a service received by the first MS,
• wherein the QDCCH is used for one of Channel Quality Information Channel (CQICH) allocation and uplink resource allocation for at least one service to require data transmission over an uplink,
• wherein the preset time excludes a Channel Quality Information (CQI) feedback period for which the first MS feeds back CQI, if the QDCCH is used to the CQICH allocation, and the preset time excludes an interval in which the first MS transmits a request for the uplink resources allocation to the BS, if the QDCCH is used to the uplink resources allocation, and
• wherein a maximum number of QDDCHs allocable as the TULCH is determined based on a total number of ODCCHs allocated by the BS and a session access delay value of each MS, which receiving service from the BS.

A mobile station (MS) for a communication system, the MS comprising:

• a controller for detecting information about a quasi-dedicated control channel (QDCCH) allocated from a base station (BS), if there is data to transmit to the BS, determining whether the QDCCH is allocated as a temporary uplink channel (TULCH), to another MS different from the MS, and if it is determined that the QDCCH is allocated to the MS itself, transmitting the data to the BS using the QDCCH;
• and
• a signal generator for generating a QDCCH signal for transmitting the data according to a control signal from the controller,
• wherein the QDCCH is temporarily allocated to the another MS for a preset time when the MS does not need to use the QDCCH,
• wherein the preset time is set within a bound satisfying at least one of a maximum allowable delay time of the MS and a quality-of-service (QoS) of a service received by the MS, and
• wherein the QDCCH is used for one of Channel Quality Information Channel (CQICH) allocation and uplink resource allocation for at least one service to require data transmission over an uplink, and
• wherein the preset time excludes a Channel Quality Information (CQI) feedback period for which the MS feeds back CQI, when the QDCCH is used to the CQICH allocation, and the preset time excludes an interval in which the MS transmits a request for the uplink resources allocation to the BS, when QDCCH is used for the uplink resources allocation,
• wherein the controller determines that the QDCCH is allocated to the another MS, when information indicating that the QDCCH is allocated to the another MS is received from the BS, and
• wherein a maximum number of QDDCHs allocable as the TULCH is determined based on a total number of QDCCHs allocated by the BS and a session access delay value of each MS, which receiving service from the BS.