Abstract
A cellular CDMA network with voice and data communications is considered. Focusing on the downlink direction, we seek for the overall performance improvement which can be achieved by cross-layer analysis and design, taking physical layer, link layer, network layer, and transport layer into account. We are concerned with the role of each single layer as well as the interaction among layers, and propose algorithms/schemes accordingly to improve the system performance. These proposals include adaptive scheduling for link layer, priority-based handoff strategy for network admission control, and an algorithm for the avoidance of TCP spurious timeouts at the transport layer. Numerical results show the performance gain of each proposed scheme over independent performance of an individual layer in the wireless mobile network. We conclude that the system performance in terms of capacity, throughput, dropping probability, outage, power efficiency, delay, and fairness can be enhanced by jointly considering the interactions across layers.
Highlights
With the growing demand and popularity of high-speed data applications in wireless networks, the system capacity and bandwidth resource become increasingly stringent
To guarantee that mobile stations (MSs) receive packets correctly, the transmission power allotted by BSs has to overcome channel impairments, which consist of path loss−α, shadowing e−(βXb), and Rayleigh fading using Jakes’ fading model [12], where dib is the distance between the MS and the BS, d0 is the reference distance, α is the path loss exponent, β = ln 10/10 is a constant, and Xb is a Gaussian distributed shadowing random variable with zero mean and variance σX2
We proposed a link-layer scheduling scheme modified adaptive priority queuing (MAPQ) as a crosslayer resource management issue for efficient resource allocation of underlying layer
Summary
With the growing demand and popularity of high-speed data applications in wireless networks, the system capacity and bandwidth resource become increasingly stringent. The hierarchical structure of the wireless networks, as the wired ones, facilitates us to design and study protocols for the single layer that is of particular interest since these layers (physical layer, link layer, network layer, transport layer, and application layer) are transparent to one another. This isolation may cause suboptimal system performance. For UF, we address the consistency of the framework as well as the distinctions of voice and data scheduling processes by discussing the common policy and individual requirements of both classes With this design, the proposed algorithm accomplishes system performance enhancement while retaining separate performance features without degradation.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
