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    • 31. 发明授权
    • Communication control method, base station device, terminal device, and communication control system using TDD-OFDMA communication method
    • 通信控制方法,基站装置,终端装置和采用TDD-OFDMA通信方式的通信控制系统
    • US08179823B2
    • 2012-05-15
    • US12443423
    • 2007-09-18
    • Toru SaharaMasamitsu NishikidoHironobu Tanigawa
    • Toru SaharaMasamitsu NishikidoHironobu Tanigawa
    • H04J3/00
    • H04L5/0091H04L5/0007H04L5/0048H04L5/1484H04L25/03006H04L27/2655H04L27/2675H04L2025/03414H04W56/0005
    • In a communication system and a communication method using a TDD-OFDMA communication method, inter-carrier interference due to delay dispersion is prevented by suppressing the delay time within a guard interval.In a base station device 10, based on a pilot symbol included in uplink information transmitted from a terminal device 20 through an assigned channel assigned by a channel assignment response, it is estimated whether a received timing of receiving the uplink information is early or late, the received timing estimation result is recorded in a timing recording unit, and when transmitting downlink information from the base station device 10, a transmission timing request is added to the downlink information based on content recorded in the timing recording unit and the downlink information is transmitted to the terminal device 20 (Step S15), and in the terminal device 20, the received transmission timing request is recorded in a transmission timing recording unit, and uplink information is transmitted from the terminal device 20 to the base station device 10 at a timing instructed by a transmission timing request (Step S16).
    • 在使用TDD-OFDMA通信方法的通信系统和通信方法中,通过抑制保护间隔内的延迟时间来防止由延迟色散引起的载波间干扰。 在基站装置10中,基于通过由信道分配响应分配的分配信道从终端装置20发送的上行链路信息中包含的导频符号,估计接收到上行链路信息的接收定时是早还是晚, 接收到的定时估计结果被记录在定时记录单元中,并且当从基站装置10发送下行链路信息时,基于记录在定时记录单元中的内容将发送定时请求添加到下行链路信息,并且发送下行链路信息 到终端装置20(步骤S15),在终端装置20中,将接收到的发送定时请求记录在发送定时记录部中,在定时发送上行链路信息从终端装置20向基站装置10发送 由发送定时请求指示(步骤S16)。