US Patent No. 10,462,837

METHOD, APPARATUS, AND SYSTEM FOR REESTABLISHING RADIO COMMUNICATION LINKS DUE TO RADIO LINK FAILURE


Patent No. 10,462,837
Issue Date October 29, 2019
Title Method, Apparatus, And System For Reestablishing Radio Communication Links Due To Radio Link Failure
Inventorship Adrian Edward Escott, Reading (GB)
Mungal Singh Dhanda, Slough (GB)
Anand Palanigounder, San Diego, CA (US)
Soo Bum Lee, San Diego, CA (US)
Assignee QUALCOMM Incorporated, San Diego, CA (US)

Claim of US Patent No. 10,462,837

1. A method operational at a wireless communication device for wireless communication with a network, the method comprising:establishing a radio communication connection with a first radio access node (RAN);
transmitting user plane data to the first RAN using control plane signaling;
determining that the wireless communication device is experiencing radio link failure (RLF) with the first RAN and that the radio communication connection should be reestablished with a second RAN;
obtaining a user equipment message authentication code (MACUE) based at least in part on one or more bits of a non-access stratum (NAS) COUNT value maintained at the wireless communication device;
sending a reestablishment message to the second RAN, wherein the reestablishment message comprises parameters used by a core network node communicatively coupled to the second RAN to authenticate the wireless communication device; and
reestablishing the radio communication connection with the second RAN, wherein the parameters comprise the MACUE.