Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2005-06-21
2005-06-21
Vuong, Quochien B. (Department: 2682)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S436000, C370S389000, C370S392000, C370S400000
Reexamination Certificate
active
06909895
ABSTRACT:
The present invention proposes a method for performing a relocation procedure for a user equipment (UE) communicating in a communication network and being movable therein, said communication network comprising at least two serving nodes (SGSN1, SGSN2) of a core network of said communication network, each of which serving nodes being connected to at least one access network controller (RNC1, RNC2) of a access network of said communication network, each of which access network controllers being adapted to perform a communication with said user equipment (UE) within its coverage area, and each serving node being assigned to a respective routing area (RA1, RA2), said method comprising the steps of monitoring (S100) the occurrence of a relocation condition, deciding (S200), whether said relocation condition is an inter serving node relocation condition, switching (S400) the communication from a first access network controller (RNC1) of a first serving node (SGSN1) to a second access network controller (RNC2) of a second serving node (SGSN2), when the decision in said decision step (S200) is positive; maintaining (S600) the control of communication in the core network anchored in the first serving node (SGSN1) while the communication connection is in a first state (S500); and changing (S700) the control of communication in the core network to the second serving node (SGSN2), when a changing condition is detected (S500). The present invention also proposes a corresponding system and network element.
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patent: 6603763 (2003-08-01), Koshino
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Einola Heikki
Haumont Serge
Rajaniemi Jaakko
Sitch Paul
Lee John J.
Squire Sanders & Dempsey L.L.P.
Vuong Quochien B.
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