US 9,872,214 B2Granted

Method and device for intra-cell handover

AssigneeChina Academy of Telecommunications Technology

InventorsWei Bao, Yi Yang, Haijing Hu, Bin Jiao

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Abstract

Disclosed in the present application are a method and a device for intra-cell handover, and a method and a device for path switching, used for avoiding network side and user equipment (UE) side next hop chaining counter (NCC) desychronization when a UE switches out of a relay node (RN), so as to avoid communication failure. The method for intra-cell handover provided in the present application comprises: an RN determining whether the value of the difference between the UE side NCC and the NCC most recently received by the RN and allocated for the UE by a mobility management entity (MME) serving the UE meets the preset triggering requirement for intra-cell handover; if the value of the difference meets the triggering requirement, then the RN initiates intra-cell handover.

Claims11

Dependent claims

An intra-cell handover method, comprising:

a Relay Node (RN) judging whether the difference between a Next Hop Chaining Counter (NCC) at the User Equipment (UE) side, and an NCC lastly received by the RN, which is allocated to the UE by a serving Mobility Management Entity (MME), satisfies a preset intra-cell handover trigger condition;
and
the RN initiating an intra-cell handover when the difference satisfies the trigger condition;
wherein the RN judging whether the difference between the NCC at the UE side, and the NCC lastly received by the RN, which is allocated to the UE by the serving MME, satisfies the preset intra-cell handover trigger condition comprises:
the RN judging whether the difference between the NCC at the UE side and the NCC lastly received by the RN, allocated to the UE by the serving MME, is below or equal to a preset intra-cell handover trigger value, and if so, then determining that the difference satisfies the trigger condition;
otherwise, determining that the difference does not satisfy the trigger condition.

3 more elements

A path switch method, comprising:

a serving Mobility Management Entity (MME) of a User Equipment (UE) receiving indication information transmitted by an evolved Node B (eNB), wherein the indication information is configured to instruct the serving MME of the UE not to allocate a new Next Hop (NH) key to the UE in a path switch procedure;
the serving MME of the UE judging from the indication information whether a new NH needs to be generated for the UE in the path switch procedure;
and
the serving MME of the UE transmitting the latest NH corresponding to the UE to a path switch target eNB;
wherein the indication information indicates:
whether the UE corresponding to a Path Switch Request message carrying the indication information is connected to the network through a Relay Node (RN);
or
whether a new NH needs to be generated for the current path switch procedure.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/395,812Filed 13 Mar 2013
Priority: CN 2012 1 011944820 Apr 2012
Published: US 2015/0111577 A123 Apr 2015
Granted: 16 Jan 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

H04W 36/24
Hand-off or reselection arrangements: reselection being triggered by specific parameters
H04W 36/08
Hand-off or reselection arrangements: reselecting an access point
H04W 84/047
Public Land Mobile systems, e.g. cellular systems: using dedicated repeater stations
H04W
Wireless communication networks