Motorola Corporation

Motorola Mobility LLC

Purdue Research Foundation

Motorola Solutions, Inc.

Arris Enterprises LLC

Jeffrey D. Bonta

Bharat Bhargava

Hong-Yon Lach

Xiaoxin Wu

Christophe Janneteau

Alexandru Petrescu

Alexis Olivereau

Jeffrey D Bonta

Thierry Ernst

A method for communicating regional broadcast datagrams over a network in which the regional broadcast datagrams are routed using destination identifications wherein a sender terminal sends regional broadcast datagrams to a sub-network grouping server that selects a plurality of sub-network servers according to criteria defined by the sender terminal and chosen as a function of information derived from the sender terminal without the individual destination identifications of the destination terminals being specified by the sender terminal, and wherein the sub-network grouping server provides regional broadcast datagrams to the selected sub-network servers, which subsequently provide the regional broadcast datagrams to a plurality of destination terminals.

Communication over selected part of a network

The invention provides a method and apparatus for building a linked binding cache. The method includes storing mobile router entries in a binding cache. The mobile router entries include a first mobile router entry having a prefix and an indication of the prefix's length along with an associated intermediate address. The method also includes linking a second mobile router entry to the first mobile router entry for delivering at least one data packet via the first mobile router. The method further includes adding a pointer in the binding cache from the entry of the second mobile router to the first mobile router entry when the intermediate address of the second mobile router matches the first mobile router's prefix in order to create a linked binding cache.

Method and apparatus for route optimisation in nested mobile-networks

A method for providing secure communications among a plurality of ad hoc devices includes authenticating one or more first devices within a first network; authenticating one or more second devices within a second network; transmitting a group key to the authenticated first devices and to the authenticated second devices; establishing an ad hoc network by at least one of the authenticated first devices and at least one of the authenticated second devices using the group key; and communicating within the ad hoc network among the at least one of the authenticated first devices and the at least one of the authenticated second devices.

Method and system for providing cellular assisted secure communications of a plurality of ad hoc devices

A method of supporting mobility in an Internet Protocol (IP)-based data network. The method comprises the steps of generating a first stateful IP autoconfiguration message at a mobile node, whereby the message includes an address capable of use for routing maintenance. The mobile node transmits the generated message to a first access node, which incorporates its address and forwards the message to a dynamic host configuration protocol (DHCP) Server. The DHCP Server and access node analyze the message to determine a route to deliver data to and/or from the mobile node. One or more route update message are triggered from said access node and said DHCP server to a number of network elements between said access node and said DHCP server in the IP based data network to support mobility in an IP domain with minimum bandwidth use and minimum tunneling required.

Routing in a data communication network

A method of transmitting a data packet on a communication path from a first communication node (CN, CN) to a second communication node (LFN, LFN) in a mobile network (). The method includes receiving a route message () from the second communication node, wherein the route message includes a list of intermediary addresses ({MR-COA}, {MR-COA, MR-COA}) between the first communication node and the second communication node. A preferred communication path is generated in response to the list of intermediary addresses; and at least one data packet is transmitted from the first communication node to the second communication node via this preferred communication path. In this matter, an optimized data path is determined in order to send at least one data packet to an intended recipient (LFN, LFN), for example in a nested mobile network scenario.

Data flow between a communication node and a mobile node in a mobile network

Known protocols for supporting mobility in relation to Internet Protocol (IP) networks are not able to efficiently support distribution of Binding Update messages to Correspondent Nodes () in a set of fixed IP networks (). Consequently, the present invention makes use of a multi-cast service provided by the IPv6 protocol in order to deliver Binding Update messages to the Correspondent Nodes (). The use of the multi-cast service to deliver Binding Update messages avoids a proliferation of such messages which would occur under know protocols requiring a mobile node () to send the Binding Update message to each Correspondent Node (). Consequently, use of bandwith in the set of fixed IP networks () is more efficient.

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Gif-sur-Yvette, France

Hong-Yon Lach