Traac sources that do not have intrinsic temporal characteristics are expected to be transported over ATM networks using the Available Bit Rate (ABR) service. These sources are amenable to reactive ow control and are expected to use bandwidth left over after servicing the guaranteed QoS services (CBR and VBR). Fair allocation of the available bandwidth to competing ABR connections is based on t...

Abstract— In a multiple input single output orthogonal frequency division multiplexing (MISO OFDM) system, per-subcarrier antenna selection is employed to improve the data rate over frequency selective fading channels. The antenna selection is based on the channel gain and the power balancing is achieved through allocating equal number of subcarriers to each antenna. This scheme of antenna sele...

This paper presents an optimal rate allocation scheme in joint sourcechannel coding (JSCC) for image transmission over CDMA networks. Our scheme first uses progressive joint source-channel codes [1] to generate operational transmission rate-distortion (TRD) functions of different multiple-access channels with different BERs. The Lagrange multiplier is then employed to set the optimal rate alloc...

A novel concept in available bit rate (ABR) service model as defined by the ATM Forum is the minimum cell rate (MCR) bandwidth guarantee for each connection. In this paper, we present a network bandwidth allocation policy to support each ABR connection’s MCR requirement, as well as its peak cell rate (PCR) constraint. Furthermore, we develop two explicit-rate (ER) based ABR algorithms consisten...

In this paper, we consider the use of an application-layer performance measure — the utility — in the context of bandwidth allocation for an available bit rate service. Our bandwidth allocation scheme can be viewed as a generalization of traditional available bit rate service; our scheme is equivalent to bandwidth max-min allocation when the utility of all applications are equal. The goal of ou...

Layered multicast is a promising technique for distributing video to a set of heterogeneous receivers. While several layered multicast approaches have been proposed, prior work usually perform adaptation on the receiver’s side and use static rate allocation techniques at the sender’s side. In this paper, we show an adaptation framework that improves stability and fairness of receivers by employ...

Rate and power allocation in OFDM systems is discussed extensively in literature. These approaches are either based on a finite set of realizable rates or make use of a continuous rate-power function. The motivation of this correspondence was to investigate how to transfer efficiently continuous rate allocations to realizable ones. To increase performance, we suggest to skip some realizable rat...

Rapid development of wireless services, leads to ubiquitous personal connectivity in the world. The demand for multimedia interactivity is higher in the world which leads to the requirement of high data transmission rate. Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) is a future wireless service which is used to overcome the existing service problems such...

Efficient radio resource allocation algorithm is proposed in this paper. Proportional fair algorithm gives favorable performance compared to two classical algorithms max-C/I and RR. But PF algorithm does not consider QoS parameters while allocating resources to the users. Moreover with less transmission power utilization Fairness disappears in PF algorithm. A PFQoS-Centric is proposed in this p...

An analytical framework for minimizing the outage probability of a coded spatial multiplexing system while keeping the rate close to the capacity is developed. Based on this framework, specific strategies of optimum power and rate allocation for the coded V-BLAST architecture are obtained and its performance is analyzed. A fractional waterfilling algorithm, which is shown to optimize both the c...