摘要:
An apparatus and method for automatically searching for a low-power Base Station (BS) supporting access of a registered user in a mobile communication system includes a method of performing automatic search on a Closed Subscriber Group (CSG) cell by a User Equipment (UE). The method includes determining by the UE whether automatic search needs to be performed on the CSG cell. The method also includes, if it is determined that automatic search does not need to be performed on the CSG cell, turning off by the UE a CSG cell automatic search function of the UE by emptying a first white list including CSG Identifiers of accessible CSG cells.
摘要:
An apparatus and method for transmitting an UpLink (UL) pilot using a scanning interval in a mobile communication system are provided. The method includes receiving a scanning response message including information on a UL pilot channel allocation mode from a serving Base Station (BS), measuring each DownLink (DL) channel state using DL signals of one or more neighboring BSs and transmitting a UL pilot to each of the one or more neighboring BSs in the UL pilot channel allocation mode, during a scanning duration. Accordingly, both UL and DL Quality of Service (QoS) may be considered during a handover operation.
摘要:
A method is provided for providing a multicast service by a base station (BS) in a wireless communication system. The method includes transmitting an Nth data traffic corresponding to a multicast service to a plurality of mobile stations (MSs) through a multicast channel in an Fth frame; determining whether a Negative Acknowledgement (NACK) message indicating a failure to receive the Nth data traffic is received from at least one MS in an (F+1)th frame; and when the NACK message is received, retransmitting the Nth data traffic to an MS, which transmitted the NACK message, through an other channel different from the multicast channel in an (F+2)th frame.
摘要:
A method for synchronizing connection identifiers (CIDs) in a communication system includes sending a first message for requesting addition of a service flow identified by a CID; sending a second message and, at the same time, setting a number of a frame where the second message is transmitted as a first start frame number; sending a third message and, at the same time, setting a number of a frame where the third message is transmitted as a second start frame number; performing a modulo operation on a frame having the first or second start frame number and its succeeding frames using a positive integer for each frame, and detecting a number of a frame where a result value of the modulo operation becomes zero; and simultaneously updating CID lists at a frame having the detected frame number with regard to a CID of the added service flow.
摘要:
Disclosed is a method of requesting bandwidth allocation by an MS having at least two CIDs in a communication system, the method including the steps of detecting at least one CID needing the bandwidth allocation; when a plurality of CIDs are detected, generating a grant management subheader including a region for recording the total number of the CIDs needing bandwidth allocation and a region for recording bandwidth information of a generic MAC header CID, and a grant management subheader including, for each of the CIDs needing bandwidth allocation, other than the generic MAC header CID, a region for recording the order of a corresponding CID given in a MS CID list and a region for recording bandwidth information of the corresponding CID; and transmitting the generic MAC header with the grant management subheaders concatenated thereto to a BS.
摘要:
A method for requesting bandwidth allocation by a mobile station in a communication system is provided. The mobile station detects at least one Connection IDentifier (CID), bandwidth allocation for which is to be requested, generates a bandwidth request header when the number of the at least one detected CID equals one, and transmits the bandwidth request header to a base station, wherein the bandwidth request header includes a region for indicating a first CID representing basic information for identification of the mobile station, a region for indicating a ranking of the detected CID, and a region for indicating information about bandwidth requested for the detected CID.
摘要:
A system and method for performing handover in a wireless mobile communication system are provided. In a Mobile Station (MS)-initiated scanning method of an (MS) in a wireless mobile communication system having at least two frequency bands with different central frequencies, the MS receives from a serving Base Station (BS) a mobile neighbor advertisement message including information about available radio resources of the neighbor BSs, transmits a new scanning request message to the serving BS, if the MS determines to measure Carrier-to-Interference and Noise Ratios (CINRs) of pilot signals from the serving BS and the neighbor BS, receives from the serving BS a response message for the scanning request message, including information about a BS which has reserved radio resources for a predetermined one of the at least two frequency bands, and measures the CINRs of the pilot signals in the predetermined frequency band.
摘要:
A method is provided for synchronizing Connection IDentifiers (CIDs) of a first station and a second station in a communication system. The CID synchronization method includes sending, by the first station, a first message for requesting addition of a service flow identified by a CID to the second station; sending, by the second station, a second message which is a response message to the first message, and at the same time, setting a number of a frame where the second message is transmitted as a first start frame number; sending, by the first station, a third message for acknowledging receipt of the second message to the second station, and at the same time, setting a number of a frame where the third message is transmitted as a second start frame number; performing, by each of the first station and the second station, a modulo operation on a frame having the first or second start frame number and its succeeding frames using a positive integer for each frame, and detecting a number of a frame where a result value of the modulo operation becomes zero (0); and simultaneously updating CID lists of the first station and the second station at a frame having the detected frame number with regard to a CID of the added service flow.
摘要:
A system and method for performing handover in a wireless mobile communication system are provided. In a Mobile Station (MS)-initiated scanning method of an (MS) in a wireless mobile communication system having at least two frequency bands with different central frequencies, the MS receives from a serving Base Station (BS) a mobile neighbor advertisement message including information about available radio resources of the neighbor BSs, transmits a new scanning request message to the serving BS, if the MS determines to measure Carrier-to-Interference and Noise Ratios (CINRs) of pilot signals from the serving BS and the neighbor BS, receives from the serving BS a response message for the scanning request message, including information about a BS which has reserved radio resources for a predetermined one of the at least two frequency bands, and measures the CINRs of the pilot signals in the predetermined frequency band.
摘要:
A method for determining a handoff of a mobile station (MS) in a mobile communication system. In the method, a serving base station (BS) measures a level of a first uplink signal by monitoring an uplink to the MS. The serving BS receives a level of a second uplink signal, measured and reported by at least one neighbor BS. The serving BS determines a handoff for the MS considering the level of the first uplink signal and the level of the second uplink signal.