Handover enabler
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsLi Jun Zhang, Laurent Marchand
Life of this patent
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Abstract
A system, a method and a Mobile Node (MN) for enabling a handover of the MN from a current serving access router (PAR) to a next serving access router (NAR) in a data communications network. At least one tunnel is present between the PAR and the NAR to enable data exchange therebetween. The MN has a first address valid under the PAR and is capable of forming a second address valid under the NAR prior to completion of the handover. The MN sends a handover request to the PAR and proceeds with a connection to the NAR without discarding its first address. The MN then completes the handover towards the NAR and receives traffic sent on the first address from the NAR.
Claims19
A system for enabling a handover in a data communications network of a mobile node (MN), the MN having a home address HoA, the system comprising:
- a current serving access router (PAR) with which the MN has a first address, the first address being different from the HoA;
- a next serving access router (NAR) with which the MN is capable of forming a second address, wherein at least one tunnel is present between the PAR and the NAR to enable data exchange therebetween;
- the MN:
- sends a handover request towards the PAR;
- and
- completes the handover with the NAR without discarding its first address;
- the PAR:
- forwards traffic received for the MN on its first address on the tunnel;
- and
- the NAR:
- following completion of the handover of the MN with the NAR, forwards traffic received for the MN on the tunnel to the first address of the MN.
A method for enabling a handover of a mobile node (MN) from a current serving access router (PAR) to a next serving access router (NAR) in a data communications network, at least one tunnel being present between the PAR and the NAR to enable data exchange therebetween, the MN having a Home address (HoA), a first address valid under the PAR and being capable of forming a second address valid under the NAR prior to completion of the handover, the method comprising steps of:
- at the MN, sending a handover request to the PAR;
- at the MN, proceeding with a connection to the NAR without discarding the first address, the first address being different from the HoA;
- completing the handover between the MN and the NAR;
- and
- at the MN, receiving traffic sent on the first address from the NAR.
A mobile node (MN) for enabling handover from a current serving access router (PAR) to a next serving access router (NAR) in a data communications network, at least one tunnel being present between the PAR and the NAR to enable data exchange therebetween, the MN having a Home Address (HoA) comprises:
- an address management module that:
- has a first address valid under the PAR, the first address being different from the HoA;
- and
- is capable of forming a second address valid under the NAR prior to completion of the handover;
- a handover management module that:
- sends a handover request to the PAR;
- proceeds with a connection to the NAR without discarding the first address;
- completes the handover between the MN and the NAR;
- and
- receives traffic sent on the first address from the NAR.
Dependencies are inferred from the claim text.