Hitachi, Ltd.

China Mobile Communications Corporation

Hitachi Communication Technologies, Ltd.

China Mobile Group Beijing Co., Ltd.

Hui Deng

Yi Zhang

Wei Chen

Tao Sun

Peng Yang

Yuanchen Ma

Koji Watanabe

Hiroki Ikeda

Yukiko Takeda

Shiro Tanabe

Min Hui

Gang Chen

Masashi Yano

Hideya Yoshiuchi

Lu Lu

Zhen Cao

Lan Jun Wang

Zhisheng Niu

Bing Wei

Dapeng Liu

Xiaoyun Wang

Bill Huang

The present invention provides a method, a device, a network element and a system for-switching a network. The method may include: obtaining, through a first network that a terminal accesses, a message required by a preparation process before the terminal switches to a second network; alternating with the second network according to the message, after the preparation process before the switching is completed, releasing a first connection so as to make the terminal directly establish a connection to the second network after releasing the first connection channel. According to the solution of the present invention, the problem of interference generated when two networks switch is avoided.

Method, device, network element and system for switching a network

A data transferring method, a system and a related network device based on proxy mobile (PM) IPv6, which are used for solving the problem that the existing data transferring scheme based on proxy mobile (PM) IPv6 can't distinguishes and controls the mobile node (MN) data packages according to service flow. The data transferring method includes: after the mobile node (MN) initiates the service flow, a mobile access gateway (MAG) and local mobility anchor (LMA) establishes a bidirectional tunnel by information interaction based on service flow binding; in which, in the process of the bidirectional tunnel establishing, the service is distributed the downlink GRE Key and uplink GRE Key, and the local mobility anchor (LMA) adds service flow identifier of the service flow and the binding relationship of the address information of the mobile node (MN); the mobile access gateway (MAG) and local mobility anchor (LMA) transfers the data packages of the service flow initiated by the mobile node (MN) on the bidirectional tunnel between the mobile access gateway (MAG) and local mobility anchor (LMA) according to the service flow identifier and the binding relationship and the uplink, downlink GRE Key.

Data transmission method, system and related network device based on proxy mobile (PM) IPV6

The invention discloses a method of transferring multicast data, a method for updating a multicast tree, a system and a device thereof, the main technical solution comprise: a first Mobile Access Gateway (MAG) receives pre-handover message transmitted from a Multicast Source before it handovers from the current accessed first MAG to the second MAG; the first MAG according to the second MAG ID carried in the pre-handover message, establishes a bidirectional tunnel with the second MAG; and the first MAG multicasts multicast data from a Multicast Source, based on the established bidirectional tunnel and the definitive post-handover multicast mode which is the multicast mode adopted by the Multicast Source after handovers to the second MAG. Adopting the technical solution, by previously establishing bidirectional tunnel, the first MAG transfers multicast data by the established directional tunnel when performing binding, updating and authenticating between the Multicast Source and the second MAG, which reduces the interruption delay of multicast service due to the switching among MAGs by Multicast Source.

Method of transferring multicast data, updating method of multicast tree, system and device thereof

Provided are a method and a device of a host with IPv4 application for performing communication. The method of the host with IPv4 application for performing data communication includes the following steps: the IPv4 application generates an IPv4 packet sent to a communication end; when confirming the type of the network the host is located in is an IPv6 network, the host transforms the IPv4 packet head of the IPv4 packet to an IPv6 packet header, and sends it to the communication end via the IPv6 network. With this invention, it can be accomplished that according to the type of the network the host is located in, the host with IPv4 application communicates with a communication end; the processing load of the system is lightened; the probability that invalidation occurs at a single node is reduced; the smooth migration and transition from original IPv4 application to IPv6 system are facilitated.

Method and device for communication for host device with IPv4 application

A communications controller according to the present invention includes a network interface, and a control unit for, when the network interface receives a request information for requesting establishment of a new multicast communications flow, judging whether or not the new multicast communications flow can be established with respect to a base station, based on communications quality parameters of the other multicast communications flows already established with a plurality of base stations, and a communications quality parameter of the new multicast communications flow, the new multicast communications flow being to be transferred by way of the base station, and establishing the new multicast communications flow if result of the judgment on the base station is YES, the new multicast communications flow being to be transferred by way of the base station.

Equipment and method for providing broadcast/multicast service in mobile communications

A server including: a communication unit for wirelessly communicating with a mobile terminal through one of wireless network gateways; and a processing unit for receiving registration request information from the mobile terminal through the communication unit, executing handoff from one wireless interface to another wireless interface and sending a signal instructing the termination of wireless connection generated by the processing unit to the wireless network gateway through the communication unit to release wireless connection before handoff between the server and the access point when the registration request information indicates the termination of the current wireless connection.

Method and apparatus for performing handoff in mobile network communication by immediately terminating a connection before changing the point of attachment to save network resources

The objective of the invention is to provide a mobile communication control method and mobile communication system in which mobile IPv6 and SIP are integrated by a core network of 3GPP2. In the mobile communication system, the mobile node MN executes a registration procedure for a Care-of-Address acquired in a visited network by the communication between the mobile node and a home agent server HA, executes a registration procedure for the Care-of-Address by the communication between the mobile node and an SIP server, and executes a communication procedure for session establishment by the communication between the mobile node MN and a correspondent node not through the home agent server but through the SIP server.

Mobile communication control method and mobile communication system

This invention provides a method of implementing a multi-party conference service (MPCS) using broadcast/multicast service of a wireless communications system used for a conference focus, the context of a corresponding broadcast/multicast service session is generated based on the media flow information, multicast service session information and MPCS information. The generated context of the broadcast/multicast service session is then sent respectively to at least one content provider server, at least one mobile terminal and the broadcast/multicast service controller so that the one or more mobile terminals acquires the content media flow through the broadcast/multicast service session.

Method of implementing multi-party conference service by using broadcast/multicast service of a wireless communications system

A handoff method of wireless LAN comprises the steps of: 1) immediately starting by a mobile terminal to count time from a time point of entering the wireless LAN or building the new association, that is, when building association with a certain access point; 2) always tracking a signal-to-noise ratio (SNR) of the old access point by the mobile terminal, and once the mobile terminal starts getting weak, starting to search for a near access point and making a preparation for handoff, and issuing a probe request signal to a new access point, and always responding to a probe response message by the new access point after receiving the probe request signal; and 3) judging by the mobile terminal whether or not to associate the new access point according to a signal strength and an association time of each of the access points, and if a judging result is yes, issuing the reassociation request signal to the new access point. Accordingly, the new access point issues a reassociation response message to build the new association.

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Beijing, China

Hui Deng