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In this paper, the performance of a multi-hop relay cellular system is evaluated. Simulation results show that with proper relay station (RS) placement, system capacity can be greatly improved. Recognizing that radio resource management mechanism also has important impact on the system performance of multi-hop relay cellular network, we then propose a novel dynamic frequency allocation and reuse mechanism...
Cognitive radio (CR) has the potential to substantially improve the system capacity and adaptability of wireless mesh network (WMN). In this paper we investigate the achievable performance gain of cognitive wireless mesh network (CWMN), in which all nodes are equipped with CRs, by jointly optimizing spectrum allocation, routing and time scheduling. The formulated optimization problem aims to minimize...
The optimization problem of maximizing the throughput of a regular multi-radio, multi-channel wireless mesh network is addressed in this paper. Given certain network topology and traffic demands, by jointly considering power control, channel assignment and scheduling, we study how to maximize the network throughput under fairness constraint. Based on graph theory, the problem is divided into several...
This paper proposes a cooperation strategy among rational nodes in a wireless cooperative relaying network as an effort to solve two basic problems, i.e., when to cooperate and how to cooperate. First, a symmetric system model comprising two users and an access point (AP) is presented. In this model, each user plays an equal role and acts as a source as well as a potential relay and has the right...
In this paper, adaptive radio resource allocation for heterogeneous traffics with different quality of service (QoS) requirements is studied. The optimization problem is formulated as to maximize the overall system throughput while satisfying the transmit rate requirements of realtime users under the constraints of total transmit power and available bandwidth. Investigation into the problem shows...
In this paper, a cross-layer analytical framework is proposed to analyze the throughput and packet delay of a two-hop wireless link. The adaptive modulation and coding (AMC) is employed at the physical layer and finite-length buffers is considered at the network layer. Firstly, we model the wireless channel as a finite state Markov chain (FSMC). Then, a method is proposed to calculate the steady-state...
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