US 12,426,120 B2
Method and system for optimizing IMS PDN connection in communication system
Mustque Ahmed, Bangalore (IN); Murali Reddiboyana, Bangalore (IN); and Gururaj B Malannavar, Bangalore (IN)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on May 10, 2024, as Appl. No. 18/661,338.
Application 18/661,338 is a continuation of application No. PCT/KR2024/004674, filed on Apr. 8, 2024.
Claims priority of application No. 202341054958 (IN), filed on Aug. 16, 2023.
Prior Publication US 2025/0063070 A1, Feb. 20, 2025
Int. Cl. H04W 76/19 (2018.01); H04L 65/1016 (2022.01); H04L 65/1069 (2022.01); H04L 65/1073 (2022.01); H04L 65/1104 (2022.01); H04W 76/38 (2018.01)
CPC H04W 76/19 (2018.02) [H04L 65/1016 (2013.01); H04L 65/1069 (2013.01); H04L 65/1073 (2013.01); H04L 65/1104 (2022.05); H04W 76/38 (2018.02)] 20 Claims
OG exemplary drawing
 
1. A method for optimizing an internet protocol (IP) multimedia subsystem (IMS) packet data network (PDN) connection, the method comprising:
establishing, by a user equipment (UE), an IMS PDN connection and an internet PDN connection with at least one data network element of a communication network, wherein a primary IP address corresponding to the IMS PDN connection and a secondary IP address corresponding to the internet PDN connection are allocated to the UE by the at least one data network element;
transmitting, by the UE to an IMS, information on the secondary IP address over the internet PDN connection, before disconnecting the IMS PDN connection by the communication network;
receiving, by the UE from the IMS, a mobile terminated (MT) call notification using the secondary IP address over the internet PDN connection while the IMS PDN connection is disconnected; and
based on the received MT call notification, establishing, by the UE, the IMS PDN connection.