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- Hu, Honglin, et al.
(författare)
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Self-Configuration and Self-Optimization for LTE Networks
- 2010
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Ingår i: IEEE Communications Magazine. - 0163-6804 .- 1558-1896. ; 48:2, s. 94-100
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Tidskriftsartikel (refereegranskat)abstract
- With the rapid growth of mobile communications, deployment and maintenance of cellular mobile networks are becoming more and more complex, time consuming, and expensive. In order to meet the requirements of network operators and service providers, the telecommunication industry and international standardization bodies have recently paid intensive attention to the research and development of self-organizing networks. In this article we first introduce both the market and technological perspectives for SONs. Then we focus on the self-configuration procedure and illustrate a self-booting mechanism for a newly added evolved NodeB without a dedicated backhaul interface. Finally, mobility load balancing as one of the most important self-optimization issues for Long Term Evolution networks is discussed, and a distributed MLB algorithm with low handover cost is proposed and evaluated.
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- Vinel, Alexey, 1983-, et al.
(författare)
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Live Video Streaming in Vehicular Networks
- 2014
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Ingår i: Communication Technologies for Vehicles, Nets4Cars/Nets4Trains/Nets4Aircraft 2014. - Heidelberg, Germany : Springer Berlin/Heidelberg. - 9783319066448 - 9783319066431 ; , s. 156-162
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Konferensbidrag (refereegranskat)abstract
- The coming years will see the adoption of IEEE 802.11p equipment, which enables broadband vehicle-to-vehicle and vehicle-to-roadside connectivity. The design and validation of prospective safety and infotainment applications in VANETs (Vehicular Ad-hoc NETworks) are currently areas of dynamic research. In this paper we introduce novel vehicular applications that are based on video transmission and targeted at improving road safety, efficiency and public security. We argue the case for the practical feasibility of the proposed applications in terms of the number of vehicles that can be supported with acceptable visual quality in VANETs environment. © 2014 Springer International Publishing.
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- You, Lei, et al.
(författare)
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Cross-layer optimization of wireless multihop networks with one-hop two-way network coding
- 2011
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Ingår i: Computer Networks. - : Elsevier BV. - 1389-1286 .- 1872-7069. ; 55:8, s. 1747-1769
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, we investigate optimal cross-layer design of congestion control, routing, one-hop two-way inter-commodity (OTIC) network coding and scheduling in wireless multihop networks utilizing the broadcast advantage of wireless medium. We first present an achievable rate region with OTIC network coding by introducing virtual flow rates in a node. Then we formulate the network utility maximization problem subject to constraints on this achievable rate region, and analyze the complexities of both node- and path-based formulation with no network coding, OTIC network coding, and overhearing network coding. After that, we solve it using dual decomposition and subgradient method. Based on the solution, we present a new queue model, which is able to facilitate the coding operation between two-way commodities, and then propose a backpressure-based cross-layer optimization algorithm with low coding complexity and overhead. Afterwards, we analyze the stability and asymptotical optimality of the proposed cross-layer algorithm by Lyapunov drift technique, and evaluate its performance through extensive simulation. By comparing with the pure routing scheme under both primary and two-hop interference models in an illustrative topology, it is shown that with the proposed joint optimization algorithms, the OTIC network coding can interact adaptively and optimally with other components in different layers and achieve high throughput gain. Simulation of the proposed algorithm in a mesh network with base station and a random ad hoc network justifies that OTIC network coding can obtain considerable throughput gain with low complexity in various kinds of networks.
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