Patent ID: 9084157
Filing Date: 2015-07-14
Classification: H04W

Abstract:
1. A method, comprising: sending to a source Node-B from a target Node-B a target Node-B cell-specific unique identifier for a user equipment to be handed over to the target Node-B; sending to the source Node-B from the target Node-B a predetermined access preamble sequence known to the target Node-B to be associated with the user equipment to be handed over to the target Node-B; and in response to receiving, by the target Node-B, the predetermined access preamble sequence transmitted during an access burst from the user equipment, sending from the target Node-B to the user equipment a preamble response comprising an index of the predetermined access preamble sequence, wherein the target Node-B provides to the source Node-B the predetermined access preamble sequence that is assigned by the target Node-B to the user equipment, and the target Node-B knows the timing and the predetermined access preamble sequence of the access burst before the timing and the preamble sequence of the access burst is sent to the user equipment and prior to the user equipment being handed over to the target Node-B so that during the handover procedure the user equipment does not assume a Temporary Cell-Specific Radio Network Temporary Identifier, wherein an access preamble group is maintained by the target Node-B and allocation from the access preamble group is based on load and made upon receiving a handover request.