US Patent No. 11,071,102

MOBILE COMMUNICATION SYSTEM, SGW, TERMINAL, RECEPTION METHOD OF MOBILE COMMUNICATION SYSTEM, RECEPTION METHOD OF SGW, AND RECEPTION METHOD OF TERMINAL


Patent No. 11,071,102
Issue Date July 20, 2021
Title Mobile Communication System, Sgw, Terminal, Reception Method Of Mobile Communication System, Reception Method Of Sgw, And Reception Method Of Terminal
Inventorship Toshiyuki Tamura, Tokyo (JP)
Assignee NEC CORPORATION, Tokyo (JP)

Claim of US Patent No. 11,071,102


1. A mobile communication system in which an Idle-mode Signaling Reduction (ISR) is active, the mobile communication system comprising:an User Equipment (UE);
an evolved Node B (eNB);
a Radio Network Controller (RNC);
a Mobility Management Entity (MME);
a Serving General Packet Radio Service Support Node (SGSN); and
a Serving Gateway (S-GW),
wherein when the S-GW receives a downlink data packet for the UE during a tracking area update procedure or a routing area update procedure with a change of the MME or the SGSN, while the ISR is still active, the UE is paged by the eNB or the RNC based on a paging message of only one of a new MME and a new SGSN.