US Patent No. 10,440,609

HANDOVER METHOD WITH LINK FAILURE RECOVERY, WIRELESS DEVICE AND BASE STATION FOR IMPLEMENTING SUCH METHOD


Patent No. 10,440,609
Issue Date October 08, 2019
Title Handover Method With Link Failure Recovery, Wireless Device And Base Station For Implementing Such Method
Inventorship Patrick Fischer, Paris (FR)
Assignee Wild Guard Ltd., Central Hong Kong (HK)

Claim of US Patent No. 10,440,609

1. A method of communicating with a network in a wireless communication system, the method comprising:detecting, by a user equipment (UE) comprising a processor, a radio link failure of a first communication link between the UE and a source cell;
performing, by the UE, a cell selection procedure upon detection of the radio link failure to identify a target cell to establish a second communication link between the UE and the target cell; and
generating by the UE an authentication vector using a cryptographic algorithm that employs inputs parameters comprising:
a secret key shared between the UE and the source cell, wherein the secret key is derived from a high level secret key and is used for protection of RRC traffic, and the secret key is a KRRCint key and the high level secret key is a KeNB key which is available to both the UE and an enhanced Node B (eNodeB), and
an identifier assigned to the target cell; and
transmitting, by the UE, a message to request a connection reestablishment with the target cell to establish the second communication link between the UE and the target cell, wherein the message includes an identifier of the UE and the authentication vector, wherein the authentication vector is to be used for verifying the UE for the connection re-establishment with the target cell.