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It is a trend to integrate different wireless access networks into heterogeneous networks in next generation wireless networks. Network selection and QoS support for multiservices are two of the most significant issues in heterogeneous wireless networks (HWN). In this paper, we propose a utility-based network selection scheme for HWN, where the price(More)
The IEEE Standard 802.16 supports for creating wireless mesh networks. The primary advantage of mesh networks is an improvement of capacity by concurrent transmission in the wireless environment. Therefore, the degree of spatial reuse is very crucial to realize the full potential of such wireless mesh networks. In this paper, we investigate the spatial(More)
—This paper investigates the simultaneous wireless information and energy transfer for the non-regenerative multiple-input multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) relaying system. By considering two practical receiver architectures, we present two protocols, time switching-based relaying (TSR) and power splitting-based(More)
In this paper, the challenging problems of severe Doppler effects in High-Speed Railway are considered. We build a cooperative antenna system and propose an algorithm of joint channel estimation and Doppler frequency offset (DFO) estimation based on Ricean channel model. Specifically, we first design a maximum likelihood estimation (MLE) algorithm for DFO,(More)
This paper investigates minimizing mutual interferences in wireless ad hoc networks by means of topology control. Prior work defines interference as a relationship between link and node. This paper attempts to capture the physical situation more realistically by defining interference as a relationship between link and link. We formulate the pair-wise(More)
– IP over WDM networks have been receiving much attention as a promising approach to building the next generation Internet since it can reduce complexities and overheads associated with the ATM and SONET layers. Provision of quality of service (QoS) is one important topic in next generation Internet. Recently , An optical burst switching scheme to support(More)
In this correspondence, we investigate the link failure problem based on the recent results of network coding. We propose a concept, named capacity factor of a network, which is the minimum link set that can influence the network capacity, as our basic tool. We define the capacity rank to each link of the network to characterize its criticality and present(More)