c l a s s e s t ak e n f o r t h e s t u d y a r e C o n v e r s a t i o na l t r a f f i c , I n t e r a c t i ve t r a f f i c a n d b a c k g r o u nd t r a f f i c w h i c h a r e w i t h va r i e d Q o S p a r a m e t e r s. Th e p a pe r a l s o p r e s e n t s t h e a n a l yt i c a l m o d e l f o r t h e C A C. T h e pa p e r c o m p ar e s t h e c a l l b l o c k i n g pr ob a b i l i...

The Code Division Multiple Access system with Time Division Duplex mode (TDD-CDMA), adopting unbalanced slot allocation between uplink and downlink, can meet the asymmetric traffic requirement of multimedia services. Here a call admission control policy is proposed to support different multimedia applications. The scheme operates at the connection-level where the CDMA code of ongoing call can b...

Tanzilah Noor Shabnam, Md. Imdadul Islam, M. R. Amin 1, First Department of Electronics and Communications Engineering,East West University, 43 Mohakhali, Dhaka 1212, Bangladesh, [email protected] Department of Computer Science and Engineering, Jahangirnagar University, Savar, Dhaka 1342, Banglades, [email protected] *3,Corresponding Department of Electronics and Communications Engineerin...

Orthogonal frequencydivisionmultiplexing (OFDM) is becoming a fundamental technology in future generation wireless communications. Call admission control is an effective mechanism to guarantee resilient, efficient, and quality-of-service (QoS) services in wireless mobile networks. In this paper, we present several call admission control algorithms for OFDM-based wireless multiservice networks. ...

We design and implement global and local CAC algorithms for CDMA networks, and compare their network throughput for various mobility scenarios. The global CAC algorithm is inherently optimized and uses global information in making every call admission decision; it yields the best possible performance but has an intensive computational complexity. The design of the local CAC algorithm uses globa...

This paper proposes an admission control algorithm that enables the upcoming IEEE 802.11e contention based Enhanced Distributed Channel Access (EDCA) to provide quantitative bandwidth guarantees for Wireless Local Area Networks (WLANs), rather than a relative prioritized service. The algorithm estimates the throughput that flows would achieve if a new flow with certain parameters was admitted, ...

The implementation of efficient call admission control (CAC) algorithms is useful to prevent congestion and guarantee target quality of service (QoS). When TCP protocol is adopted, some inefficiencies can arise due to the peculiar evolution of the congestion window. The development of cross-layer techniques can greatly help to improve efficiency and flexibility for wireless networks. In this fr...

We examine the problem of accepting a new request for a pre-stored VBR video stream that has been smoothed using any of the smoothing algorithms found in the literature. The output of these algorithms is a piecewise constant-rate schedule for a Variable Bit-Rate (VBR) stream. The schedule guarantees that the decoder buffer does not overflow or underflow. The problem addressed in this paper is t...

This paper presents the signal-to-interference plus noise ratio (SINR)-based call admission control (CAC) as an effective technique that guarantees signal quality for admitted users. We propose a CAC model that admits users as long as the SINR exceeds a threshold ( th SINR ). To reduce blocking, we ensure that the threshold level is maintained at a lower bound ( th lb SINR − ), convenient to ke...

This paper presents a novel history-based policy for call admission control (CAC) in mobile cellular networks, which is based on statistics of the past system S behavior. This algorithm can be used as an extension of conventional guard channel (CGC) scheme or it can pe$onn independently of CGC. It shows improvements compared to CGC by reducing the new call blocking probability, increasing the c...