British Telecommunications Public Limited Company

Uniloc Luxembourg S.a.

Uniloc Usa, Inc.

Andrej Mihailovic

Abdol Hamid Aghvami

Paul Anthony Pangalos

George Kamel

Philip L Eardley

Robert Hancock

Jochen Eisl

In a wireless network environment comprising a mobile router serving a moving network, said mobile router for attaching to a packet-switched access network that uses a micro-mobility protocol and a Quality of Service (QoS) protocol to route packet data to and from said mobile router, wherein said mobile router has a QoS aggregate requirement generated by nodes attached thereto, a method of handover of said mobile router to a mobility agent in said access network, which method comprises the steps of: (i) said mobile router sends a QoS request message to said mobility agent, which QoS request message comprises a QoS parameter representing said QoS aggregate; (ii) upon receipt by said mobility agent, said access network takes a QoS admission decision on the basis of said QoS parameter; and (iii) said mobility agent sends a QoS acknowledgement to said mobile router whereby said mobility agent informs said mobile router of the outcome of said QoS admission decision; characterized by the step of (iv) if said QoS admission decision is that said mobility agent cannot handle all of said QoS aggregate, said QoS acknowledgement comprises an identity of one or more alternative mobility agent that might meet at least a part of said QoS aggregate that will not be provided by said mobility agent.

Network mobility

A telecommunications system includes a mobile network having a plurality of portable communication devices, and a fixed network which includes a signaling agent, a plurality of directory agents, and a plurality of spaced apart attachment points to which the mobile network can attach. In use, each directory agent stores a routing table for routing data to a respective mobile communication device associated with that directory agent. When the point of attachment of the mobile network changes, the mobile network sends a change-of-address message to the signaling agent. In response, the signaling agent is configured to forward the change of address to each directory agent, so that each can update its routing table to take into account the changed point of attachment of the mobile network. Because a signaling agent is provided, each portable device need not itself notify its directory agent when the mobile network moves, and the amount of signaling between the mobile network and the fixed network when the mobile network moves is reduced.

Telecommunications system

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London, United Kingdom

Andrej Mihailovic