Patent ID: 9668182
Date: 2017-05-30
CPC Classifications: H04L,H04W

Claim:
1. A method for security capability negotiation during handover of a user equipment (UE) from a first network to a second network, wherein the first network is a 2 nd generation (2G) or 3 rd generation (3G) network, the second network is a long term evolution (LTE) access network, the method comprising: receiving, by an evolved node B (eNodeB) of the second network, a handover preparation request message from a mobility management entity (MME) of the second network, wherein the handover preparation request message includes a list of radio resource control (RRC) algorithms and a list of user plane (UP) encryption algorithms supported by the UE; selecting, by the eNodeB, a RRC algorithm and a UP encryption algorithm supported by both the UE and the eNodeB, according to the list of the RRC algorithms and the list of the UP encryption algorithms supported by the UE and a list of RRC algorithms and a list of UP encryption algorithms supported by the eNodeB; and sending, by the eNodeB, the selected RRC algorithm and the selected UP encryption algorithm to the MME of the second network.