Abstract: A method for efficient channel access by using partial error detection code is utilized in a centralized wireless communication system. The partial error detection code is derived from the error detection codes of the transport layer to act as the reference of the error detection of a protocol data unit. This method performs a data validation test in a data-link layer. If an error is found, the proceeding data transmission will be stopped immediately to avoid unnecessary waste of the bandwidth resource of a web channel.

Abstract: A wireless communication system, method for transmitting a frame, and computer program product thereof are provided. The system comprises a base station and a subscriber station. The frame comprises a MAP area and a user area. The MAP area comprises a broadcast test area. The method and the computer program product thereof operate: the base station initially transmitting a first burst in the user area by a first transmission module; determining whether the first burst that is transmitted by the first transmission module fits a special situation; and if yes, the base station transmitting test information in the broadcast test area by a second transmission module or asking the subscriber station to transmit data by a second transmission module.

Abstract: A method for direct link in wireless communication system is provided, which is applied in a base station with functions for broadcast and time division duplex (TDD), the method comprising the following steps: receiving connection request signalings including position information from a plurality of subscriber stations (SSs) with global positioning systems (GPSs); determining the SSs which can carry out the direct link, according to the connection request signalings; allocating time slots to each SS which can carry out direct link in the scheduling; calculating a relative distance between the two SSs according to the position information; determining an initial transmit power for the transmitting SS, and adjusting it many times; finally, adding the adjusted transmit power value and the time slot information allocated to the SSs in the scheduling into the broadcast message.

Abstract: A wireless communication system using channel access based on a contention approach and method thereof is disclosed, which allocates plural sets of time slots in a predetermined contention interval, wherein each set of time slots further includes plural adjacent overlapped time slots. A channel requester transmits a contention message to a channel allocator at a time slot based on an interleaved method after the channel requester completes count down of a predetermined time, so that the positions of the headers of the contention messages in the adjacent time slots of each set of time slot are different. Thus, if the contention message transmitted by the channel requester collides with the contention message of the adjacent time slot, the channel allocator can parse the headers of the collided contention messages and respectively allocate plural special channel times for communicating with the channel requesters.