Method for managing mobility of a mobile device within a network using a proxy MIPv6 protocol

摘要

Method for managing mobility of a mobile device (MS) within a network using a proxy MIPv6 protocol comprising MAG and LMA logical functions, wherein MAG issues a PBU to bind the mobile device (MS) with the LMA, a LMA-time being initialized and maintained within the LMA and the method comprising a relative time synchronization procedure between LMA and all of the MAG connected to it, said procedure providing that each MAG sends a PBU with specific semantics to request the LMA-time, the PBU acknowledgement (PBU-Ack) sent by the LMA including such LMA-time, said LMA-time being further maintained within each MAG, the method further comprising a binding procedure in which all of the MAG insert in each PBU sent a timestamp including the current maintained LMA-time. Upon receipt of a LMA-timestamped PBU from a MAG, the LMA sends a successful PBU-Ack if no other MAG currently binds the mobile device (MS) with the LMA or if the timestamp is newer than the one received from the MAG currently binding the mobile device (MS); an out of date PBU-Ack if the timestamp is not newer than the one received from the MAG currently binding the mobile device (MS).

主权项

1. Method for managing mobility of a mobile device within a network, comprising:
at a Local Mobility Anchor (LMA) of an internet protocol (IP) network, initializing and maintaining an LMA-time within the LMA; performing a relative time synchronization procedure between the LMA and a plurality of Media Access Gateways (MAGs) connected to the LMA using MIPv6 signaling, said relative time synchronization procedure comprising:
receiving a first Proxy Binding Update (PBU) request with specific semantics from each MAG in conjunction with the corresponding MAG connecting to the LMA, each first PBU request requesting the LMA-time, wherein the specific semantics correspond to predefined values for a Care-Of Address (CoA) and a Home-Of Address (HoA), the predefined values being either null or another value that does not conflict in domain space; andproviding a first PBU acknowledgement with the LMA-time to MAGs from which first PBU requests were received, wherein MAGs receiving the first PBU acknowledgement maintain the LMA-time; and performing a binding procedure to bind the mobile device to the LMA using MIPv6 signaling, the binding procedure comprising:
receiving a second PBU request from one or more MAG connected to the LMA in conjunction with the mobile device performing entry to an access network associated with the corresponding MAG, each second PBU request including a timestamp based on the LMA-time maintained by the corresponding MAG; andsending a second PBU acknowledgement to the corresponding MAG in response to each second PBU request received, wherein the second PBU acknowledgement includes a successful acknowledgement if no other MAG currently binds the mobile device with the LMA or if the timestamp in the corresponding second PBU request is newer than timestamps received in prior second PBU requests for binding the mobile device, wherein the second PBU acknowledgement includes an out of date acknowledgement if the timestamp in the corresponding second PBU request is not newer than timestamps received in prior second PBU requests for binding the mobile device.