Patent ID: 9686678
Date: 2017-06-20
CPC Classifications: H04B,H04L,H04W

Claim:
1. A method performed during a handover from a source system to a target system, the method comprising: receiving, by a mobility management network device, key information from the source system, the key information being used for a derivation of an access security management entity key; sending, by the mobility management network device, to a base station in the target system, a parameter used in the derivation of the access security management entity key and a non-access stratum (NAS) algorithm; receiving, by the mobility management network device, a transparent container from the base station, the transparent container includes the parameter used in the derivation of the access security management entity key, a radio resource control (RRC) algorithm, a user plane (UP) algorithm, and the NAS algorithm; and sending, by the mobility management network device, the transparent container to the source system, wherein a first radio access technology supported by the source system and a second radio access technology supported by the target system are different.