Patent ID: 7855994
Filing Date: 2010-12-21
Classification: H04W

Abstract:
1. A transceiver used in a mobile communication system, which system allows a plurality of transceivers to communicate in a same frequency band, comprising: a first sync timing detection part configured to detect sync timing for a desired signal transmitted from a counterpart transceiver; a target sync timing detection part configured to detect sync timings for one or more undesired signals from non-counterpart transceiver(s) and determine a target sync timing; an error information determination part configured to determine error information indicating a time period obtained by calculating a timing difference between the sync timing for the desired signal and the target sync timing and multiplying the timing difference by a coefficient such that the time period becomes shorter than the timing difference; a feedback signal generating part configured to generate a feedback signal containing the error information; a transmission timing determination part configured to update transmission timing for a transmission signal including the feedback signal according to a control signal received from the counterpart transceiver; and a transmission part configured to transmit the transmission signal to the counterpart transceiver according to the updated transmission timing; wherein the transmission timing determination part is configured to determine the transmission timing based on the target sync timing determined by the target sync timing detection part prior to starting radio communication with the counterpart transceiver based on the target sync timing and a time period indicated by the control signal during radio communication with the counterpart transceiver, such that the transmission timing synchronizes with a transmission timing of the non-counterpart transceiver to improve accuracy in distinguishing counterpart transceiver transmissions from overlapping non-counterpart transceiver transmissions, and the error information determination part determines the time period shorter than the timing difference by multiplying the timing difference by (N−1)/N, where N denotes the number of transceivers simultaneously communicating in the frequency band.