US 7,512,104 B2
Resolving hanging contexts when roaming in a GPRS network
Frode Bjelland, Arendal (Norway); and Ezzat Kaafarani, Grimstad (Norway)
Assigned to Telefonaktiebolaget L M Ericsson (PUBL), Stockholm (Sweden)
Filed on Feb. 11, 2003, as Appl. No. 10/364,189.
Claims priority of application No. 20020667 (NO), filed on Feb. 11, 2002.
Prior Publication US 2003/0153309 A1, Aug. 14, 2003
Int. Cl. H04Q 7/24 (2006.01)
U.S. Cl. 370—338  [370/331; 370/351; 370/401; 370/352; 455/432.1; 455/435; 455/436; 455/458] 12 Claims
OG exemplary drawing
 
1. A method for preventing the occurrence of a hanging resource in connection with a Serving Radio Network Subsystem (SRNS) Relocation Procedure when a mobile terminal roams from a first Serving General Packet Radio Service (GPRS) Support Node (SGSN) with an associated source Radio Network Controller (RNC) to a second SGSN with an associated target RNC, said method comprising the steps of:
if, during said SRNS Relocation Procedure, said first SGSN detects that the connection to the mobile terminal is broken subsequent to transmission of a Relocation Command to said source SGSN, initiating a release of a resource established during the SRNS Relocation Procedure in the second SGSN, the target RNC or any involved Gateway GPRS Support Node (GGSN).