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    • 2. 发明申请
    • Base Station Apparatus and Wireless Communication Method
    • 基站装置和无线通信方法
    • US20100128684A1
    • 2010-05-27
    • US12440432
    • 2007-08-29
    • Hironobu TanigawaYasuhiro NakamuraToru SaharaNobuaki Takamatsu
    • Hironobu TanigawaYasuhiro NakamuraToru SaharaNobuaki Takamatsu
    • H04W72/04
    • H04L1/1812H04L1/1893H04W72/0453H04W88/08
    • A base station apparatus which conducts a packet communication with a wireless communication terminal includes: a retransmission request detection unit which detects a retransmission request from the wireless communication terminal; a bandwidth assignment unit which assigns a communication bandwidth applied to the packet communication; a modulation class calculation portion, based on both bandwidth information regarding the bandwidth assigned by the bandwidth assignment unit and a data amount of packets corresponding to the retransmission request, calculates a modulation class applied to a retransmission in order to adjust a number of retransmitted packets to be the same as a number of previously transmitted packets; a modulation class determination unit which determines whether or not the modulation class is lower than a modulation class applied to a previous packet transmission; and a retransmission unit which retransmits packets corresponding to the retransmission request based on the determination result regarding the modulation class.
    • 与无线通信终端进行分组通信的基站装置包括:重发请求检测单元,其从无线通信终端检测重发请求; 带宽分配单元,其分配应用于分组通信的通信带宽; 调制类计算部分,基于与带宽分配单元分配的带宽的带宽信息和与重传请求对应的分组的数据量,计算应用于重传的调制类,以便将重传分组的数量调整为 与以前传输的数据数量相同; 调制类别确定单元,确定调制类别是否低于应用于先前分组传输的调制类别; 以及重传单元,其基于关于调制类别的判定结果,重发与所述重发请求对应的分组。
    • 3. 发明授权
    • Base station apparatus and wireless communication method
    • 基站装置和无线通信方法
    • US08170573B2
    • 2012-05-01
    • US12440432
    • 2007-08-29
    • Hironobu TanigawaYasuhiro NakamuraToru SaharaNobuaki Takamatsu
    • Hironobu TanigawaYasuhiro NakamuraToru SaharaNobuaki Takamatsu
    • H04B1/38H04J3/16
    • H04L1/1812H04L1/1893H04W72/0453H04W88/08
    • A base station apparatus which conducts a packet communication with a wireless communication terminal includes: a retransmission request detection unit which detects a retransmission request from the wireless communication terminal; a bandwidth assignment unit which assigns a communication bandwidth applied to the packet communication; a modulation class calculation portion, based on both bandwidth information regarding the bandwidth assigned by the bandwidth assignment unit and a data amount of packets corresponding to the retransmission request, calculates a modulation class applied to a retransmission in order to adjust a number of retransmitted packets to be the same as a number of previously transmitted packets; a modulation class determination unit which determines whether or not the modulation class is lower than a modulation class applied to a previous packet transmission; and a retransmission unit which retransmits packets corresponding to the retransmission request based on the determination result regarding the modulation class.
    • 与无线通信终端进行分组通信的基站装置包括:重发请求检测单元,其从无线通信终端检测重发请求; 带宽分配单元,其分配应用于分组通信的通信带宽; 调制类计算部分,基于与带宽分配单元分配的带宽的带宽信息和与重传请求对应的分组的数据量,计算应用于重传的调制类,以便将重传分组的数量调整为 与以前传输的数据数量相同; 调制类别确定单元,确定调制类别是否低于应用于先前分组传输的调制类别; 以及重传单元,其基于关于调制类别的判定结果,重发与所述重发请求对应的分组。
    • 6. 发明申请
    • OFDMA Communication System and Communication Method
    • OFDMA通信系统和通信方法
    • US20090303949A1
    • 2009-12-10
    • US12442340
    • 2007-09-19
    • Hironobu TanigawaYasuhiro NakamuraNobuaki Takamatsu
    • Hironobu TanigawaYasuhiro NakamuraNobuaki Takamatsu
    • H04W72/04H04L27/28
    • H04W72/042H04L5/0007H04L5/0094
    • There is provided an OFDMA communication system capable of suppressing the communication resource reduction and reducing the processing load on a base station. The system includes a downlink frame generation unit (14) that generates a downlink frame for a downlink period for performing communication to at least one terminal (20) of a plurality of terminals from the base station (10), an uplink frame generation unit (24) that generates an uplink frame for an uplink period for performing communication to the base station (10) from at least one terminal (20) of the plurality of terminals, and a channel allocation unit that allocates, for one terminal of the plurality of terminals, one or more subchannels available in the one terminal, wherein the channel allocation unit notifies information of the allocated one or more available subchannels to the one terminal only by the downlink frame.
    • 提供了能够抑制通信资源减少并降低基站处理负荷的OFDMA通信系统。 该系统包括下行链路帧生成单元(14),其生成用于从基站(10)向多个终端中的至少一个终端(20)进行通信的下行链路周期的下行链路帧,上行链路帧生成单元 24),其生成用于从所述多个终端中的至少一个终端(20)向所述基站(10)进行通信的上行链路周期的上行链路帧,以及信道分配单元,对于所述多个 终端,一个终端中可用的一个或多个子信道,其中,信道分配单元仅通过下行链路帧向一个终端通知所分配的一个或多个可用子信道的信息。
    • 7. 发明授权
    • Communication system, base station and mobile station used in the communication system, and base station switching method
    • 通信系统中使用的通信系统,基站和移动台以及基站交换方式
    • US08493930B2
    • 2013-07-23
    • US12447425
    • 2007-10-25
    • Hironobu TanigawaYasuhiro NakamuraNobuaki Takamatsu
    • Hironobu TanigawaYasuhiro NakamuraNobuaki Takamatsu
    • H04W36/00
    • H04L5/0053H04W36/0083
    • There are provided an OFDMA communication system capable of reducing a time necessary for a handover without releasing a wireless communication with a base station as a handover source to search base stations, a base station and a mobile station used in the communication system, and a base station switching method.In an OFDMA communication system in which data communication is performed between a plurality of base stations 10 and a plurality of mobile stations, each base station 10 includes subchannel assignment setting unit 15-1 which sets assignment of subchannels including a first subchannel and a second subchannel for each of the mobile stations, the first subchannel including information indicating usable or unusable subchannels of the respective mobile stations and being assigned to the respective mobile stations, the second subchannel including actually-used data. When a request for switching the first subchannel is received from one of the mobile stations 20, the second subchannel is collected and assigned to a same slot as the first subchannel assigned to the one of the mobile stations 20.
    • 提供了OFDMA通信系统,其能够减少切换所需的时间,而不会释放与作为切换源的基站的无线通信,以搜索在通信系统中使用的基站,基站和移动站,以及基站 站切换方式。 在多个基站10和多个移动台之间进行数据通信的OFDMA通信系统中,各基站10包括子信道分配设定部15-1,其设定包含第1子信道和第2子信道的子信道的分配 对于每个移动站,第一子信道包括指示各个移动站的可用或不可用的子信道并被分配给各个移动站的信息,第二子信道包括实际使用的数据。 当从移动站20之一接收到切换第一子信道的请求时,收集第二子信道并将其分配给与分配给移动站20之一的第一子信道相同的时隙。
    • 9. 发明申请
    • OFDMA Communication System and Communication Method
    • OFDMA通信系统和通信方法
    • US20100067458A1
    • 2010-03-18
    • US12442291
    • 2007-09-19
    • Hironobu TanigawaYasuhiro NakamuraNobuaki Takamatsu
    • Hironobu TanigawaYasuhiro NakamuraNobuaki Takamatsu
    • H04W72/00
    • H04L5/1484H04L5/0007H04L5/0048H04W72/04
    • There is provided an OFDMA communication system capable of suppressing the communication resource reduction and reducing the processing load on a base station. The system includes a downlink frame generation unit (14) that generates a downlink frame for a downlink period for performing communication to at least one terminal (20) of a plurality of terminals from the base station (10), an uplink frame generation unit (24) that generates an uplink frame for an uplink period for performing communication to the base station (10) from at least one terminal (20) of the plurality of terminals, and a channel allocation unit that allocates, for one terminal of the plurality of terminals, one or more subchannels available in the one terminal, wherein the channel allocation unit allocates, among the subchannels, subchannels having a same time slot and a same frequency band in the downlink frame and in the uplink frame for a single terminal of the plurality of terminals.
    • 提供了能够抑制通信资源减少并降低基站处理负荷的OFDMA通信系统。 该系统包括下行链路帧生成单元(14),其生成用于从基站(10)向多个终端中的至少一个终端(20)进行通信的下行链路周期的下行链路帧,上行链路帧生成单元 24),其生成用于从所述多个终端中的至少一个终端(20)向所述基站(10)进行通信的上行链路周期的上行链路帧,以及信道分配单元,对于所述多个 终端,一个终端中可用的一个或多个子信道,其中信道分配单元在子信道中分配在下行链路帧中具有相同时隙和相同频带的子信道,并且在多个子载波中的单个终端的上行链路帧中 的终端。
    • 10. 发明申请
    • MOBILE COMMUNICATIONS SYSTEM, MOBILE STATION DEVICE, BASE STATION DEVICE AND CHANNEL ALLOCATION METHOD
    • 移动通信系统,移动站设备,基站设备和信道分配方法
    • US20100046446A1
    • 2010-02-25
    • US12441374
    • 2007-08-28
    • Hironobu TanigawaYasuhiro NakamuraNobuaki Takamatsu
    • Hironobu TanigawaYasuhiro NakamuraNobuaki Takamatsu
    • H04W72/04
    • H04W72/085H04W72/02H04W72/0406
    • Each mobile station device (12) includes: a subchannel allocation refusal determining section (50), which determines a subchannel refused to be allocated from a base station device (10), based on a communication quality measured for each subchannel by a communication quality measuring section (44); an RMAP creating section (52), which creates refused channel information (RMAP information) indicating the subchannel determined to be refused to be allocated; and a transmitting section (54) which gives notice of the created RMAP information to the base station device (10). The base station device (10) includes: an RMAP acquiring section (26), which acquires the RMAP information noticed from the each mobile station device (12); and a subchannel allocating section (32), which determines whether to change a subchannel to be allocated to the each mobile station device (12), based on the acquired RMAP information and allocated channel information (MAP information) indicating the subchannel allocated to the each mobile station device (12).
    • 每个移动站装置(12)包括:子信道分配拒绝确定部(50),其基于通过通信质量测量对每个子信道测量的通信质量来确定拒绝从基站装置(10)分配的子信道 第(44)段; RMAP创建部分(52),其创建指示被拒绝被分配的子信道的拒绝信道信息(RMAP信息); 以及向基站装置(10)通知所创建的RMAP信息的发送部分(54)。 基站装置(10)包括:RMAP获取部(26),其从各移动台装置(12)获取注意到的RMAP信息; 以及子信道分配部(32),其基于所获取的RMAP信息和分配的指示分配给每个移动台装置(12)的子信道的子信道的分配信道信息(MAP信息),确定是否改变要分配给每个移动台装置(12)的子信道 移动站装置(12)。