QoS support for an all IP system beyond 3G

Abstract

The mobile radio systems beyond third generation (3G) will evolve in all-IP systems, integrating Internet and mobile systems advantages. BRAIN project is developing a system architecture which combines local coverage broadband radio access systems based in HIPERLAN/2 with several wider coverage mobile radio systems, enabling full coverage of seamless IP-based services for users in hot spot areas and on the move. End to end quality of service (QoS) provision is one of the mayor challenges in the design of such a system and must be supported by the application, network and wireless access layers. This paper proposes a QoS system architecture, including the terminal architecture, the IP based access network and the main characteristics of the enhancements to the air interface based in HIPERLAN/2 focusing on its wireless QoS support.

A Service-Differentiated Access Algorithm for Future Cooperative Networks

“…The mean random access delay resembles the access delay of Indicators as 2 1 3 * 2 1 c AccessDelay p ω ω…”

“…Besides, the retransmission policy adopted here is uniform backoff (UB) without considering the maximum retransmission times, which can be used to tradeoff the discarding probability and delay performance. The details of retransmission policy is to create a i W which is distributed uniformly in [ ] 1,ω , when collision occurs, the collided user will back off as i W .…”

“…The target of the next generation wireless systems is to set up a free communication environment to enhance the users' experiences as well as the resources utilizations [1][2]. And the random access strategy, which is significant for the initialization of transmissions or registration of users, should be an effective way to achieve the targets when a communication is launched.…”

Location management framework for next generation wireless systems

“…Integrating multiple subsystems brings many challenges ranging from interworking among inherently different wireless 1 This work was supported by NSF under grant number ANI-0117840. subsystems to QoS provisioning [5], [8]. In the literature, many location registration and paging schemes are proposed for homogeneous wireless systems [8], [9], [10].…”

“…In the literature, many location registration and paging schemes are proposed for homogeneous wireless systems [8], [9], [10]. If each subsystem retains its own schemes, location information is updated in all subsystems independently causing high power consumption in the mobile terminals and high signaling overhead in the access network.…”