To support rate allocation schemes for wireless ad hoc networks at the MAC layer, a cross-layer MAC protocol is proposed in this paper to coordinate transmissions among flows and guarantee their allocated rates. Two different algorithms are implemented in this protocol: the first one is able to support an arbitrary bandwidth allocation scheme but has a longer convergence time, while the second ...

Studies have found that the decline of the fertility rate, which reduces the number of siblings, is an important factor in narrowing the gender gap in education. However, given the number of children, sex composition of siblings also affects individual educational attainment. Few relevant studies on this issue are available in China. This study investigates the effects of sibling sex compositio...

In this paper, we consider an optimal power allocation scheme for Rayleigh fading channels in cognitive relay networks considering both total transmit power and average interference power constraints. We derive the optimal power allocation scheme between the cognitive source and relay aiming at minimizing the bit error rate of cognitive system by applying convex optimization method. Simulation ...

A heuristic optimal discrete bit allocation algorithm is proposed for solving the margin maximization problem in discrete multitone (DMT) systems. Starting from an initial equal power assignment bit distribution, the proposed algorithm employs a multistaged bit rate allocation scheme to meet the target rate. If the total bit rate is far from the target rate, a multiple-bits loading procedure is...

The problem of power allocation is studied for a multiple-input multiple-output (MIMO) decode-and-forward (DF) two-way relaying system consisting of two source nodes and one relay. It is shown that achieving maximum sum-rate in such a system does not necessarily demand the consumption of all available power at the relay. Instead, the maximum sum-rate can be achieved through efficient power allo...

This paper studies the distortion and the model-based bit allocation scheme of wavelet lifting-based multiview image coding. Redundancies among image views are removed by disparity-compensated wavelet lifting (DCWL). The distortion prediction of the low-pass and high-pass subbands of each image view from the DCWL process is analyzed. The derived distortion is used with different rate distortion...

Network multimedia applications require certain performance guarantees that can be provided through proper resource allocation. Allocation techniques are needed to provide these guarantees as efficiently as possible since resources are limited. This paper presents an allocation method called Dynamic Search Algorithm (DSA+). DSA+ is an on-line algorithm that dynamically adjusts the resource allo...

With a few exceptions, most of the research dealing with power allocation, and more recently power/rate allocation in DS-CDMA based networks has concentrated on centralized resource allocation algorithms for cellular systems where the base station keeps track of the service requirements and is thus responsible for the management of network resources. Adhoc WLANS, howeveq are configured as peer-...

In this paper, we study rate allocation for a set of end-to-end communication sessions in multi-radio wireless mesh networks. We propose cross-layer schemes to solve the joint rate allocation, routing, scheduling, power control and channel assignment problems with the goals of maximizing network throughput and achieving certain fairness. Fairness is addressed using both a simplified max-min fai...