Patent ID: 9155121
Filing Date: 2015-10-06
Classification: H04W

Abstract:
1. A method, implemented in a node of a Radio Access Network (RAN) for use with a mobile device, the method comprising: receiving at the RAN node a request from the mobile device for re-establishment of a radio resource control (RRC) connection that was deliberately suspended by another RAN node, wherein the another RAN node is configured to transmit a connection suspend command message to the mobile device to cause the mobile device to suspend the RRC connection and store RRC connection data for the RRC connection; attempting, by the RAN node after receiving the request from the mobile device, to retrieve RRC connection data relating to the suspended RRC connection; receiving an indication, based on the attempting, from the another RAN node whether any RRC connection parameters are valid or invalid; and in response to the RRC connection parameters being valid based on the indication, sending a connection re-establishment command message to the mobile device, wherein the mobile device is configured to use the stored RRC connection data to re-establish the suspended RRC connection; and in response to the RRC connection parameters are being invalid based on the indication, sending a connection re-establishment reject message to the mobile device rejecting the RRC connection parameters and then receiving a request from the mobile device after the rejecting to initiate a normal RRC connection process to establish a new RRC connection with the mobile device.