US 12,323,901 B2
Cellular telecommunications network
Richard MacKenzie, London (GB); and Douglas Fripp, London (GB)
Assigned to British Telecommunications Public Limited Company, London (GB)
Appl. No. 18/570,170
Filed by BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY, London (GB)
PCT Filed Jun. 10, 2022, PCT No. PCT/EP2022/065836
§ 371(c)(1), (2) Date Dec. 14, 2023,
PCT Pub. No. WO2022/263318, PCT Pub. Date Dec. 22, 2022.
Claims priority of application No. 2108635 (GB), filed on Jun. 17, 2021.
Prior Publication US 2024/0276351 A1, Aug. 15, 2024
Int. Cl. H04W 48/08 (2009.01)
CPC H04W 48/08 (2013.01) 5 Claims
OG exemplary drawing
 
1. A method of operating a management node in a cellular telecommunications network, the cellular telecommunications network including a first base station and a User Equipment (UE), the management node storing a first set of tracking area codes, wherein the first base station is configured to transmit a first tracking area code and the UE is configured to send a tracking area update request message to the first base station identifying the first tracking area code, the method comprising:
receiving a request message from the first base station, the request message including the first tracking area code identified in the tracking area update request message;
comparing the received first tracking area code to the first set of tracking area codes; and
sending a response message to the first base station, the response message accepting or rejecting a tracking area request based on the comparison,
wherein:
when each of the first set of tracking area codes is associated with a base station that supports a circuit switched voice service, the accepting or the rejecting of the tracking area request includes accepting the tracking area request if the received first tracking area code is one of the first set of tracking area codes, and
when each of the first set of tracking area codes is associated with a base station that does not support the circuit switched voice service, the accepting or the rejecting of the tracking area request includes rejecting the tracking area request if the received first tracking area code is one of the first set of tracking area codes.