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    • 16. 发明授权
    • Wireless communication method, access point, wireless communication station and wireless communication system
    • 无线通信方式,接入点,无线通信台和无线通信系统
    • US08363582B2
    • 2013-01-29
    • US12549927
    • 2009-08-28
    • Kei IgarashiAkira Yamada
    • Kei IgarashiAkira Yamada
    • G08C17/00H04L12/413
    • H04W72/005H04W72/1278H04W74/0816H04W76/28
    • When a wireless communication station, which is about to communicate while intermittently receiving a multicast service, transmits, to an access point, a request packet describing information on the multicast service and an intermittent reception request, the access point describes, in a packet, intermittent reception timing information corresponding to the multicast service information described in this request packet, and replies with this packet to the wireless communication station. The wireless communication station reads the intermittent reception timing information from the received packet, and performs transition to the Awake state or the Doze state according to this intermittent reception timing. The access point, on the other hand, transmits the multicast packet to the wireless communication station according to the intermittent reception timing.
    • 当间歇地接收多播服务时要通信的无线通信站向接入点发送描述关于多播服务的信息的请求分组和间歇接收请求时,接入点在分组中描述间歇性 与该请求分组中描述的多播服务信息相对应的接收定时信息,并且向该无线通信台回复该分组。 无线通信站从接收到的分组中读取间歇接收定时信息,根据该间歇接收定时,进行到唤醒状态或打盹状态的切换。 另一方面,接入点根据间歇接收定时将组播分组发送到无线通信台。
    • 18. 发明申请
    • WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION STATION, ACCESS POINT AND WIRELESS COMMUNICATION METHOD
    • 无线通信系统,无线通信站,接入点和无线通信方法
    • US20100080162A1
    • 2010-04-01
    • US12563606
    • 2009-09-21
    • Kei IgarashiAkira Yamada
    • Kei IgarashiAkira Yamada
    • H04W72/04H04L12/413H04H20/71
    • H04L12/1877H04L12/189
    • An object of the present invention is to suppress quality deterioration of a multicast packet due to transmission delay jitter. An access point comprises: a received packet analysis unit which extracts, from a packet transmitted from a wireless communication station, identification information for identifying a wireless communication station, MC reception information to indicate whether the wireless communication station receives a multicast packet or not, and communication operation information to indicate whether the communication operation of the wireless communication station is set to PS mode or not; an STA table management unit which generates an STA table associating the extracted identification information, MC reception information and communication operation information, and stores this STA table in a memory; and a packet transmission timing control unit which controls a transmission timing of the multicast packet based on the STA table stored in the memory.
    • 本发明的目的是抑制由于传输延迟抖动导致的多播分组的质量恶化。 接入点包括:接收分组分析单元,从从无线通信站发送的分组中提取用于识别无线通信站的识别信息,用于指示无线通信站是否接收到多播分组的MC接收信息;以及 用于指示无线通信站的通信操作是否被设置为PS模式的通信操作信息; STA表管理单元,其生成将提取的识别信息,MC接收信息和通信操作信息相关联的STA表,并将该STA表存储在存储器中; 以及分组发送定时控制单元,其基于存储在存储器中的STA表来控制多播分组的发送定时。
    • 19. 发明申请
    • WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD
    • 无线通信设备和无线通信方法
    • US20070183326A1
    • 2007-08-09
    • US11671280
    • 2007-02-05
    • Kei IgarashiAkira YamadaAtsushi FujiwaraTakatoshi Sugiyama
    • Kei IgarashiAkira YamadaAtsushi FujiwaraTakatoshi Sugiyama
    • H04L12/26H04J1/16
    • H04W72/1221H04L1/1887H04L65/80H04W28/18H04W74/085
    • A wireless communication device that performs packet transmission in accordance with a packet transmission system that performs wireless bandwidth allocation by virtual carrier sensing has a time-point management section that manages the time-point and outputs current time-point information, and a parameter management section that manages a parameter relating to packet transmission right acquisition priority. The parameter management section includes: a parameter holding section that holds, in association with a time-point, a parameter relating to packet transmission right acquisition priority that changes with a different distribution between wireless communication devices located in the same wireless LAN area, in a prescribed period; and a parameter alteration section that reads, from the parameter holding section, the parameter associated with current time-point information and dynamically alters a current parameter relating to packet transmission right acquisition priority in accordance with the parameter thus read.
    • 根据通过虚拟载波侦听执行无线带宽分配的分组传输系统执行分组传输的无线通信装置具有管理时间点并输出当前时间点信息的时间点管理部分,以及参数管理部分 管理与分组传输权获取优先级相关的参数。 参数管理部分包括:参数保持部分,其在时间点中保持与位于同一无线LAN区域中的无线通信设备之间以不同分布发生变化的分组发送权获取优先级相关的参数, 规定期限 以及参数修改部,其从参数保持部读取与当前时间点信息相关联的参数,并且根据所读取的参数动态地改变与分组发送权获取优先级有关的当前参数。