Abstract
A joint power control and maximally disjoint routing algorithm is proposed for multihop CDMA wireless ad hoc networks. A framework of power control with QoS constraints in CDMA wireless ad hoc networks is introduced and the feasibility condition of the power control problem is identified. Both centralized solution and distributed implementations are derived to calculate the transmission power given the required throughput and the set of transmitting nodes. Then, a joint power control and maximally disjoint routing scheme is proposed for routing data traffic with minimum rate constraint while maintaining high energy efficiency and prolonged network lifetime. Furthermore, in order to provide reliable end-to-end data delivery, the proposed joint power control and maximally disjoint routing scheme is augmented by a dynamic traffic switching mechanism to mitigate the effect of node mobility or node failure. Simulation results demonstrate the effectiveness of the proposed scheme.
Highlights
Wireless ad hoc networks have come under extensive scrutiny in terms of research focus, due to their ability to provide wireless networking capability in scenarios where either no fixed wired infrastructure is available or rapid implementation is possible
We study joint power control and routing for QoS support in CDMA wireless ad hoc networks
In a wireless ad hoc network architecture, medium access control (MAC) protocol plays a critical role in optimizing bandwidth efficiency and resolving collisions due to the broadcast nature of wireless channels
Summary
Wireless ad hoc networks have come under extensive scrutiny in terms of research focus, due to their ability to provide wireless networking capability in scenarios where either no fixed wired infrastructure is available or rapid implementation is possible (e.g., disaster relief efforts, battlefields, etc.). The lack of fixed infrastructure introduces great design challenges, including protocols design for routing, medium access control (MAC), and mobility management These protocols may function at different layers, it is agreed that jointly designed protocols across layers will improve the network performances. We study joint power control and routing for QoS support in CDMA wireless ad hoc networks. Even for static TCP-based applications such as web browsing, if the data rate is too low, we typically get a large queue buildup which can lead to TCP timeouts and poor performance. Such effects were discussed by Chakravorty et al in [6]. By setting minimum data rate differently for different users we can ensure service differentiation
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