Patent ID: 9603064
Date: 2017-03-21
CPC Classifications: H04W

Claim:
1. A handover method of a mobile terminal, the method comprising: a) determining, by the mobile terminal, at least one target node to which the mobile terminal intends to handover; b) selecting, by the mobile terminal, at least one channel of the at least one target node for a reserved access to the at least one target node; c) providing, by the mobile terminal, information on the at least one target node and information on the selected at least one channel of the at least one target node for the reserved access to the at least one target node, to at least one source node; d) providing, by at least one of the at least one source node, the information on the selected at least one channel for the reserved access to the at least one target node; e) requesting, by the mobile terminal, handover acceptance to the at least one target node; and f) performing, by the mobile terminal, random access to the at least one target node, wherein the mobile terminal performs contention-free random access by previously reserving a resource of the at least one target node, or performs contention-based random access using the resource of the at least one target node, wherein, when the at least one target node cannot allocate a previously reserved resource to the mobile terminal, the at least one target node classifies the previously reserved resource as an unreserved resource, wherein, when the previously reserved resource is not allocated to the mobile terminal, the mobile terminal performs contention-based random access using the unreserved resource of the at least one target node, wherein the mobile terminal transmits at least one random access signal using at least one resource of the at least one target node, and wherein, when the mobile terminal transmits the at least one random access signal using at least two resources, the mobile terminal transmits a same random access signal or different random access signals using the at least two resources.