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    • 22. 发明专利
    • Switching method between heterogeneous communication interfaces, mobile terminal and management device
    • 异构通信接口,移动终端和管理设备之间的切换方法
    • JP2008160665A
    • 2008-07-10
    • JP2006349404
    • 2006-12-26
    • Matsushita Electric Ind Co Ltd松下電器産業株式会社
    • KOBAYASHI MASASHIIKEDA SHINKICHITAKEI ICHIRO
    • H04L12/727H04W36/14H04W36/30H04W48/16H04W80/04H04W88/06
    • PROBLEM TO BE SOLVED: To obtain a mobile terminal, etc. by which switching between networks with different transmission delay is surely attained at high speed. SOLUTION: The mobile terminal 10 includes an interface determination part 106 which acquires, when switching of heterogenous communication interfaces 101 and 102 is performed, transmission delay via various access networks to be connected with communication interfaces at a switching source and a switching destination and compares the acquired transmission delay, a switching processing part 105 which transmits a position registration message via an access network 1 when the transmission delay via the access network to be connected with the communication interface 101 at the switching source is smaller than the transmission delay via the access network to be connected with the communication interface 102 at the switching destination and the communication interfaces 101, 102 which receive the position registration completion message via one of the access network. COPYRIGHT: (C)2008,JPO&INPIT
    • 解决的问题:为了获得可以高速获得具有不同传输延迟的网络之间的切换的移动终端等。 解决方案:移动终端10包括接口确定部分106,其在执行异构通信接口101和102的切换时获取经由各种接入网络的传输延迟,以在切换源和切换目的地与通信接口连接 并且比较所获取的传输延迟,当经由接入网络的传输延迟经由接入网络1发送位置登记消息的切换处理部分105时,与切换源处的通信接口101连接的传输延迟小于传输延迟经由 与切换目的地的通信接口102连接的接入网络和通过接入网络之一接收位置登记完成消息的通信接口101,102。 版权所有(C)2008,JPO&INPIT
    • 24. 发明专利
    • Packet transferring method and transferring device
    • 分组传输方法和传输设备
    • JP2006060633A
    • 2006-03-02
    • JP2004241846
    • 2004-08-23
    • Matsushita Electric Ind Co Ltd松下電器産業株式会社
    • IKEDA SHINKICHIFUNABIKI MAKOTO
    • H04L12/70H04W36/02H04W36/08H04W80/04
    • PROBLEM TO BE SOLVED: To reduce packet loss that occurs at the time of hand-over without explicit signaling of a mobile terminal. SOLUTION: A transferring device has: a packet transferring part 13 for transferring packets addressed to a mobile station; a packet storing part 14 and 18 for storing packets; a receiving part 11 and 12 for representatively receiving the packets addressed to the mobile terminal and receiving a packet transfer request; and a transfer control part 13 for storing received packets in the packet storage part 14 and 18 at the time of receiving notification of representative reception, and for instructing the packet transferring part to transfer the packets stored in the packet storage part 14 and 18 to the mobile terminal when packet transfer request notification is received. Thereby, the packets addressed to the mobile terminal is stored, and the stored packets are transferred when the mobile terminal is connected again. Hence, an application of a communication terminal to be a transmission source at the time of hand-over that is completed in a short period of time, continues communication so that application processing load is reduced. COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:为了减少在切换时发生的分组丢失,而没有移动终端的显式信令。 解决方案:传送设备具有:分组传送部分13,用于传送寻址到移动台的分组; 用于存储分组的分组存储部分14和18; 接收部分11和12,用于代表性地接收寻址到移动终端的分组并接收分组传送请求; 以及传送控制部分13,用于在接收到代表接收通知时将接收到的分组存储在分组存储部分14和18中,并且用于指示分组传送部分将存储在分组存储部分14和18中的分组传送到 收到分组传输请求通知时的移动终端。 因此,存储了寻址到移动终端的分组,并且当移动终端再次连接时,存储的分组被传送。 因此,在短时间内完成的切换时的通信终端作为发送源的应用继续进行通信,从而减少应用处理负担。 版权所有(C)2006,JPO&NCIPI
    • 28. 发明专利
    • Router selecting method and router apparatus
    • 路由器选择方法和路由器设备
    • JP2005130476A
    • 2005-05-19
    • JP2004279083
    • 2004-09-27
    • Matsushita Electric Ind Co Ltd松下電器産業株式会社
    • KUMAZAWA MASAYUKIMATSUMOTO TAISUKEIKEDA SHINKICHIKOBAYASHI HIROKAZUFUNABIKI MAKOTOKAWAHARA TOYOKI
    • H04L12/46H04L12/66H04L12/70H04L12/701H04L12/721H04L12/751H04L12/761H04L12/56
    • H04L45/60H04L45/00H04L45/125H04L45/16H04L45/306H04L45/58H04L45/586
    • PROBLEM TO BE SOLVED: To provide a router selecting method and a router apparatus for realizing efficient communication all over a network according to a request of an application or the like. SOLUTION: A multicast packet transmitting part 201 for periodically multicasing an identifier of a local apparatus, a relay deciding part 205 for deciding whether a received data packet should be relayed to the router of another segment, a sequence deciding part 207 for deciding, based on information included in multicast packets from other routers, a router to which the data packet should be transferred, and a packet relaying part 206 for informing through a router as a relay destination selected by the sequence deciding part 207, the source of transmitting the data packet and transferring the data packet to the selected router, when it is decided that the received data packet should not be relayed, are included, whereby a router suitable for relaying the packet is eventually selected and, since the switching of relay routers is performed only by redirecting the routers, there is no need of providing any additional functions to the terminals. COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:提供一种路由器选择方法和路由器装置,用于根据应用的请求等来实现网络上的有效通信。 解决方案:一种用于周期性地将本地装置的标识符多重化的组播分组发送部分201,用于判定接收的数据分组是否应该被中继到另一分段的路由器的中继判定部分205,用于决定的序列确定部分207 基于来自其他路由器的组播分组中包含的信息,应该传送数据分组的路由器,以及分组中继部206,用于通过路由器通知由序列决定部207选择的中继目的地,发送源 数据包并将数据包传送到所选择的路由器,当确定接收到的数据包不应被中继时,最终选择适合中继包的路由器,并且由于中继路由器的切换是 仅通过重定向路由器来执行,不需要向终端提供任何附加功能。 版权所有(C)2005,JPO&NCIPI
    • 30. 发明专利
    • Base station communication equipment, mobile station communication equipment and communication equipment between vehicles on road
    • 基站通信设备,道路交通工具车辆通讯设备及通讯设备
    • JP2003304188A
    • 2003-10-24
    • JP2002108709
    • 2002-04-11
    • Matsushita Electric Ind Co Ltd松下電器産業株式会社
    • KIMURA KYOYAABE KATSUAKIUENO SHINICHIROIKEDA SHINKICHI
    • H04J3/00H04B7/26
    • PROBLEM TO BE SOLVED: To provide communication equipment between vehicles on a road which has high transmission efficiency by selecting an optimum transmitting speed and an optimum modulation method while following the large temporal change of the communication environment of a mobile station in a dedicated short range communication (DSRC) system. SOLUTION: This communication equipment between vehicles on a road (base station communication equipment 11, mobile station communication equipment) measures a radio wave propagation situation and changes modulation and demodulation systems and signal transmitting speeds on the basis of measurement results even during communication. This enables the communication equipment between vehicles on the road with high transmission efficiency to select an optimum transmitting speed and an optimum modulation method while following the large temporal of change the communication environment of the mobile station. COPYRIGHT: (C)2004,JPO
    • 要解决的问题:通过选择最佳发送速度和最佳调制方法,在跟随移动台的通信环境的大的时间变化的同时,在专用的传输效率的道路上的车辆之间提供通信设备 短距离通信(DSRC)系统。 解决方案:道路上的车辆之间的通信设备(基站通信设备11,移动台通信设备)测量无线电波传播情况,甚至在通信期间基于测量结果改变调制和解调系统和信号传输速度 。 这使得能够以高传输效率的道路上的车辆之间的通信设备选择最佳的发送速度和最佳调制方式,同时跟随移动台的通信环境的大的改变时间。 版权所有(C)2004,JPO