Patent · US Active

Short message transmission and handover procedures

US9894579B2 · kind B2 · utility

6Cited by

4References

6Claims

0Family size

Assignee

Sun Patent Trust · US

Inventors

Genadi Velev · Darmstadt, DE
Jens Bachmann · Langen, DE
Shinkichi Ikeda · Saitama, JP

Key dates

Filing date	Jan 14, 2016
Grant date	Feb 13, 2018
Priority date	—
Expiry date	Jan 14, 2036

Classification

Technology area (CPC H)Electricity
CPC primaryH04W76/30
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

The present invention relates to an improved method for handover of a mobile node from E-UTRAN to UTRAN in a scenario where SMS is the only service of the mobile node. The improved handover method allows saving radio resources by establishing the signalling connection for SMS exchange in the target network, and avoiding the data connection in the target network, since it is not used. The MME takes the decision to establish or not the data connection in the target UTRAN, and accordingly instructs the SGSN and UE to set the corresponding PDP contexts for the data connection to a “preserved” state, so as to avoid the establishment of same. Embodiments further relate to improved SMS delivery for IDLE mode UEs that activate ISR so as to avoid the involvement of the MSC server. Instead, packet-switched domain nodes are to be involved only.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.