Circuit-switched services over SAE/LTE networks

US8958389B2 · kind B2 · utility

Assignee

• Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

• Jari Vikberg · Huaraz, PE
• Andreas Witzel · Herzogenrath, DE
• Magnus Hallenstål · Täby, SE
• Magnus Olsson · carrer de Sertori, SE
• Gunnar Mildh · Sollentuna, SE

Key dates

• Filing date: Oct 21, 2008
• Grant date: Feb 17, 2015
• Expiry date: Jun 11, 2032

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04W88/16
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

A method and apparatus for providing both Mobile Terminated, MT, and Mobile Originated, MO, circuit switched (CS) services such as Short Message Service, SMS, services in networks utilizing CS Fallback and CSoLTE-I architectures. An extended SGs interface referred to as SGs+ is implemented between a Mobility Management Entity, MME, in an SAE core network and a Mobile Switching Center Server, MSC-S. The SGs+ interface supports transmission of upper layer CS packet data units while utilizing either connectionless or connection-oriented Signaling Connection Control Part, SCCP, operation. The non access stratum, NAS, signaling support between the User Equipment, UE, and the MME is extended to provide support for both MT SMS and MO SMS service.