Patent ID: 9730131
Date: 2017-08-08
CPC Classifications: H04W

Claim:
1. A method for managing handover (HO) from a first radio access network to a second radio access network, the method performed at a first network entity of the first radio access network, the method comprising: receiving a measurement report from a user equipment (UE); determining to trigger the HO for the UE from the first radio access network to the second radio access network, based on the measurement report; transmitting a handover required message including first information indicating whether the HO is for only a circuit switched (CS) network or both a CS network and a packet switched (PS) network, based on the determining; and initiating a PS to CS HO for a voice bearer, wherein the first information is used, by a first core network entity, to separate the voice bearer from a non-voice bearer, wherein a HO for the non-voice bearer is suspended, if the second radio access network does not support a dual transfer mode (DTM), wherein the suspended non-voice bearer is resumed, if a call corresponding to the voice bearer is terminated and if the UE is in the second radio access network, and wherein second information associated with the resuming of the suspended non-voice bearer is transmitted to a second core network entity, and wherein the voice bearer and the non-voice bearer are associated with the PS network in the first radio access network and the voice bearer is associated with the CS network in the second radio access network and the non-voice bearer is associated with the PS network in the second radio access network.