Patent · US Active

Access stratum manager

US8107437B2 · kind B2 · utility

2Cited by

5References

14Claims

0Family size

Assignee

RESEARCH IN MOTION LIMITED · CA

Inventors

Gjalt Gerrit De Jong · Leuven, BE
Gerald D. Kelliher · London, GB
Robert J. Harrison · Sheffield, GB

Key dates

Filing date	Jul 5, 2011
Grant date	Jan 31, 2012
Priority date	—
Expiry date	Jul 5, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04W88/06
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A multi-mode mobile communication device may include a processing device, a memory sub-system, a communication sub-system operable to communicate with the plurality of wireless access networks, and a protocol stack stored in the memory sub-system and executed by the processing device. The protocol stack may include a first access stratum, a second access stratum, a non-access stratum and an access stratum manager. The first access stratum may communicate with a first wireless access network via the communication sub-system. The second access stratum may communicate with a second wireless access network via the communication sub-system. The non-access stratum may communicate with a core network. The access stratum manager may interface the non-access stratum with the first and second access strata, and may be operable to activate the first access stratum to establish a communication link with the core network over the first wireless access network. The access stratum manager may be further operable to maintain the communication link between the non-access stratum and the core network while transferring the communication link from the first access stratum to the second access stratum…

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