1. 3GPP, TS 23.002 – v9.1.0, Network Architecture, 3G Release 9, 2009. Available from: .
2. 3GPP, TS 23.401 – v8.6.0, General Packet Radio Services (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access, 3G Release 8, 2009. Available from: .
3. 3GPP, TR 23.880 – v0.1.0, Stage2 for registration in densely-populated area (RED), 3G Release 8, 2007. Available from: .
4. Movement-based location update and selective paging for PCS networks;Akyildiz;ACM/IEEE Transactions on Networking,1996
5. Mobility management in next generation wireless systems;Akyildiz;Proceeding of IEEE,1999