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    • 42. 发明授权
    • Packet communication system
    • 分组通信系统
    • US07881250B2
    • 2011-02-01
    • US10466518
    • 2002-01-18
    • Ichiro OkajimaTakehiro IkedaTakuya ShinozakiKoji Omae
    • Ichiro OkajimaTakehiro IkedaTakuya ShinozakiKoji Omae
    • H04W4/00
    • H04W36/02H04W36/0011H04W80/04
    • The present invention provides a packet communication system including a mobile host, a home agent, a correspondent host, and a mobility agent, where the mobility agent operates in such a way that when the mobile host is in an active mode and has no need for buffering packets, the mobility agent forwards packets received from the home agent or the correspondent host to the mobile host; and alternatively, in the case when the mobile host is in an active mode, but requires buffering of packets, the mobility agent buffers the packets, and further in the case when the mobile host is in an idle mode, the mobility agent buffers the packet and notifies the mobile host of arrival of the packet, in order to prevent the loss of a packet addressed to a mobile host thus decreasing the traffic and the transmission frequency of Binding Update packets.
    • 本发明提供了包括移动主机,归属代理,通信主机和移动代理的分组通信系统,其中移动代理以这样的方式操作,使得当移动主机处于活动模式并且不需要 缓冲分组,移动性代理将从归属代理或通信主机接收的分组转发到移动主机; 另外,在移动主机处于活动模式但需要缓存分组的情况下,移动代理缓存分组,并且在移动主机处于空闲模式的情况下,移动代理缓冲分组 并且向移动主机通知分组的到达,以便防止丢失寻址到移动主机的分组,从而减少绑定更新分组的业务量和传输频率。
    • 44. 发明授权
    • Routing method, node, packet communication system, program, and recording medium
    • 路由方法,节点,分组通信系统,程序和记录介质
    • US07301948B2
    • 2007-11-27
    • US10362366
    • 2002-06-28
    • Koji OmaeTakehiro IkedaIchiro OkajimaNarumi Umeda
    • Koji OmaeTakehiro IkedaIchiro OkajimaNarumi Umeda
    • H04L12/28H04L12/56H04J3/24
    • H04L45/00H04L29/06H04L49/90H04L69/04H04L69/22H04L2212/00
    • A configuration comprises a destination address extracting/rewriting device 4 for extracting a destination address of a packet; a common-route packet extracting device 8 for extracting two or more packets having a common route at least in part of routes to their respective terminals from a plurality of packets, based on their extracted destination addresses; an aggregate packet creating device 9 for aggregating the plurality of packets having the common route at least in part of the routes to create an aggregate packet including information of each of the packets; a destination address giving device 10 for giving the aggregate packet a destination address so that the destination address of the aggregate packet is an address of an adjacent node on the common route; and an aggregate packet routing device 11 for routing the aggregate packet, based on the destination address.
    • 配置包括用于提取分组的目的地地址的目的地地址提取/重写装置4; 公用路由分组提取装置8,用于根据它们提取的目的地地址从多个分组中提取具有至少部分路由的至少部分路由到其各自终端的公共路由的两个或更多个分组; 聚合分组创建装置9,用于至少部分路由聚合具有公共路由的多个分组,以创建包括每个分组的信息的聚合分组; 目的地地址给出装置10,用于向聚合分组提供目的地址,使得聚合分组的目的地地址是公共路由上相邻节点的地址; 以及用于基于目的地地址路由聚合分组的聚合分组路由设备11。
    • 45. 发明授权
    • Method and device for communicating via an ad-hoc wireless network
    • 通过自组织无线网络进行通信的方法和设备
    • US07224954B2
    • 2007-05-29
    • US09748243
    • 2000-12-27
    • Ichiro OkajimaYasushi Yamao
    • Ichiro OkajimaYasushi Yamao
    • H04Q7/20H04B15/00
    • H04B7/26H04B7/022H04W88/06
    • A communication method used when a mobile station receives a signal from a base station in a mobile communication system is provided. The method includes the steps of: deciding one or a plurality of mobile stations which can communicate with the mobile station via a predetermined wireless network and which can receive a signal from the base station; the one or a plurality of mobile stations sending a signal destined for the mobile station received from the base station to the mobile station via the predetermined wireless network; and the mobile station synthesizing a signal received from the base station and the signal destined for the mobile station received from the one or a plurality of mobile stations.
    • 提供了移动台在移动通信系统中从基站接收信号时使用的通信方法。 该方法包括以下步骤:决定可以经由预定无线网络与移动台进行通信并且可以从基站接收信号的一个或多个移动站; 所述一个或多个移动台经由所述预定无线网络向所述移动台发送去往所述基站的去往所述移动台的信号; 合成从基站接收的信号的移动站和从一个或多个移动站接收到的发往移动台的信号。
    • 46. 发明授权
    • Paging control method and paging control system in communication system
    • 通讯系统中的寻呼控制方法和寻呼控制系统
    • US06920322B2
    • 2005-07-19
    • US09993918
    • 2001-11-06
    • Takehiro IkedaIchiro OkajimaNarumi Umeda
    • Takehiro IkedaIchiro OkajimaNarumi Umeda
    • H04M3/42H04B5/04H04W68/00H04Q7/20
    • H04W68/00
    • Efficient paging control is achieved in a communication system that selectively provides one of communication services implemented by integrating a plurality of communication systems. Before transmitting a downlink signal to a terminal, a gateway requests each of the communication systems to transmit a paging signal to the terminal. Receiving the paging signals transmitted from the communication systems, the terminal selects a communication system A with the lowest communication cost in accordance with communication cost information contained in the paging signal. The terminal sends a request for connection to the selected communication system A. As a result, the communication system A transmits the downlink signal to the terminal.
    • 在选择性地提供通过集成多个通信系统实现的通信服务之一的通信系统中实现有效的寻呼控制。 在向终端发送下​​行链路信号之前,网关请求每个通信系统向终端发送寻呼信号。 接收从通信系统发送的寻呼信号,终端根据包含在寻呼信号中的通信成本信息来选择具有最低通信成本的通信系统A. 终端向所选择的通信系统A发送连接请求。结果,通信系统A向终端发送下​​行链路信号。
    • 47. 发明授权
    • Mobile communication system, network and mobile station
    • 移动通信系统,网络和移动台
    • US6157837A
    • 2000-12-05
    • US786480
    • 1997-01-21
    • Yasuhiro KatoAkihiro MaebaraIchiro OkajimaKazuo SugiyamaKoji Sasada
    • Yasuhiro KatoAkihiro MaebaraIchiro OkajimaKazuo SugiyamaKoji Sasada
    • H04W36/08H04Q7/20
    • H04W36/0061
    • An object of the present invention is to reduce the control time required when a channel handover is performed in a mobile communication system. The conventional system has such shortcomings that a long time is required for re-designating a channel when a channel handover procedure results in failure. Particularly, in the common access type system, there is such a problem that since a channel handover is required to be performed several times during a channel handover procedure, an extra time is required for performing the handover procedure. The present invention has a plurality of base stations for covering the service area, and a mobile station for performing a communication with the base stations through radio channels. Here, the present invention is characterized in that the base stations notify the mobile station of a plurality of candidates when the mobile station performs a handover procedure, thereby improving the problem inherent in the conventional system that a single candidate is notified when a channel handover procedure is performed. Therefore, the present invention makes it possible to change the channel to the next candidate channel at high speed when the previous channel handover procedure results in failure.
    • 本发明的目的是减少在移动通信系统中执行信道切换时所需的控制时间。 常规系统具有这样的缺点:当信道切换过程导致故障时,需要很长时间来重新指定信道。 特别地,在公共接入型系统中,存在这样的问题,即由于在信道切换过程中需要多次执行信道切换,所以需要额外的时间来执行切换过程。 本发明具有用于覆盖服务区域的多个基站和用于通过无线电信道与基站进行通信的移动站。 这里,本发明的特征在于,当移动台执行切换过程时,基站通知移动台多个候选,从而改善了常规系统固有的问题,当通道切换程序 被执行。 因此,当先前的信道切换过程导致故障时,本发明使得可以以高速将信道改变为下一个候选信道。