SERVING GATEWAY EXTENSIONS FOR INTER-SYSTEM MOBILITY

SERVING GATEWAY EXTENSIONS FOR INTER-SYSTEM MOBILITY

Methods, devices, and systems related to serving gateway extensions for inter-system mobility in integrated small Cell and WiFi networks. An SGW may be extended into a common intermediate gateway for both LTE and WiFi access. A GTP-based "S1a" interface between a TWAN and an SGW is introdu...

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Hauptverfasser: LI, Qing, STARSINIC, Michael, F, TOMICI, John, L
Format: Patent
Sprache:eng ; fre ; ger
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ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
WIRELESS COMMUNICATIONS NETWORKS
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creator LI, Qing
STARSINIC, Michael, F
TOMICI, John, L
description Methods, devices, and systems related to serving gateway extensions for inter-system mobility in integrated small Cell and WiFi networks. An SGW may be extended into a common intermediate gateway for both LTE and WiFi access. A GTP-based "S1a" interface between a TWAN and an SGW is introduced. The STa interface between TWAN and 3GPP AAA server/proxy is extended to enable selection of an SGW for establishment of the disclosed S la interface. The extended SGW and protocols may be used to optimize inter-system mobility between LTE small cells and trusted WiFi. SGW and PDN Gateway (PGW) functionality is disclosed to support GTP-based IP flow mobility via multi-access (LTE and WiFi) connectivity to the same packet data network (PDN). Non-access stratum (NAS), EAP, and GTP-C protocols may also be extended to include a "multi-connection" indication in addition to existing "handover" indication.
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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
WIRELESS COMMUNICATIONS NETWORKS
title SERVING GATEWAY EXTENSIONS FOR INTER-SYSTEM MOBILITY
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