Inter-system mobility and service management in GSM/PDC roaming

IEEE Trans. Wireless Commun.

2002

219

100

Abstract-Global wireless networks enable mobile users to communicate regardless of their locations. One of the most important issues is location management in a highly dynamic environment because mobile users may roam between different wireless systems, network operators, and geographical regions. In this paper, a location-tracking mechanism is introduced that consists of intersystem location updates and intersystem paging. Intersystem update is implemented by using the concept of boundary location area, which is determined by a dynamic location update policy in which the velocity and the quality of service are taken into account on a per-user basis. Also, intersystem paging is based on the concept of boundary location register, which is used to maintain the records of mobile users crossing the boundary of systems. This mechanism not only reduces location-tracking costs, but also significantly decreases call-loss rates and average-paging delays. The performance evaluation of the proposed schemes is provided to demonstrate their effectiveness in multitier personal communication systems.

Section: B Boundary Location Area and Boundary Location Register Conmentioning

confidence: 99%

Section: A Intersystem Location Update Costsmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

A dynamic location management scheme for next-generation multitier PCS systems

IEEE Trans. Wireless Commun.

2002

219

100

“…For the non-dedicated architecture, the VLR contains two sets of information pointing to the GSM and DECT location areas. In [18], a logical interworking function (IWF) entity is presented to support the roaming between GSM and personal digital cellular (PDC) systems. The configuration of IWF consists of an IWF-Location register an IWF-switch to handle intersystem roaming service.…”

Section: Introductionmentioning

confidence: 99%

A cost-efficient signaling protocol for mobility application part (MAP) in IMT-2000 systems

Proceedings of the 7th Annual International Conference on Mobile Computing and Networking

2001

An efficient signaling protocol for mobility application part (MAP) is essential to mobility support when mobile terminals roam between different networks in next generation wireless systems such as IMT-2000. In this paper, a new signaling protocol is proposed to reduce the overhead caused by mobility management, alleviating network load and consumption of network resources. Moreover, the new protocol effectively reduces the latency of call delivery and call loss rate due to crossing wireless systems with different standards and signaling protocols. Instead of performing location registration after a mobile user arrives at the new system, the mobile user is required to update its location information prior to its reaching the boundary of two systems. Results in this study demonstrate that the new protocol yields significant benefits in terms of reducing signaling costs, delays, and call loss rates.

“…The signaling traffic of intersystem location registration and paging was analyzed based on different network architectures. In [27], the intersystem location registration was studied on GSM/PDC roaming and additional interworking units were proposed to carry out signaling format transformation and authentication. However, in each of the above papers, the signaling costs were not computed based on any specific location update and paging algorithm and the quality of service (QoS) requirements such as call loss and paging delay were not considered.…”

Section: Introductionmentioning

confidence: 99%

Intersystem location update and paging schemes for multitier wireless networks

Proceedings of the 6th Annual International Conference on Mobile Computing and Networking

2000

B r o a d b a n d & Wireless Networking L a b o r a t o r y School of Electrical a n d C o m p u t e r E n g i n e e r i n g Georgia I n s t i t u t e of Technology A t l a n t a , GA 30332 ABSTRACT G l o b a l wireless n e t w o r k s e n a b l e m o b i l e users to comm u n i c a t e r e g a r d l e s s of t h e i r locations, O n e of t h e m o s t i m p o r t a n t issues is l o c a t i o n m a n a g e m e n t in a h i g h l y d y n a m i c e n v i r o n m e n t b e c a u s e m o b i l e users m a y r o a m b e t w e e n d i f f e r e n t wireless networks~ n e tw o r k operators~ a n d g e o g r a p h i c a l regions, I n this paper~ a l o c a t i o n t r a c k i n g m e c h a n i s m is introduced~ w h i c h consists of i n t e r s y s t e m l o c a t i o n u p d a t e s u s i n g t h e c o n c e p t of b o u n d a r y l o c a t i o n a r e a ( B L A ) a n d p a g i n g u s i n g t h e c o n c e p t of b o u n d a r y l o c a t i o n regi s t e r ( B L R ) . T h e B L A is d e t e r m i n e d b y a d y n a m i c l o c a t i o n u p d a t e p o l i c y in w h i c h t h e v e l o c i t y a n d t h e q u a l i t y of s e r v i c e (QoS) a r e t a k e n i n t o a c c o u n t o n a p e r -u s e r basis, T h e B L R is u s e d to m a i n t a i n t h e r e c o r d s of m o b i l e u s e r s crossing t h e b o u n d a r y of n e t w o r k s . T h i s m e c h a n i s m n o t o n l y r e d u c e s locat i o n t r a c k i n g costs b u t also s i g n i f i c a n t l y d e c r e a s e s call loss r a t e s a n d a v e r a g e p a g i n g delays. T h e perf o r m a n c e e v a l u a t i o n of t h e p r o p o s e d s c h e m e s is prov i d e d to d e m o n s t r a t e t h e i r effectiveness in m u l t i t i e r wireless n e t w o r k s .