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In co-channel deployment of macro cell and pico cells, cell range extension (RE), a simple and typical cell association scheme, is introduced to achieve better load balancing and improve cell edge performance. In this article, a novel dynamic and distributed bias setting scheme is proposed for RE technique in macro-pico heterogeneous networks. In this strategy, the worst user throughput of each cell...
Heterogeneous networks are employed in the next generation communication systems to enhance the area spectral efficiency (ASE), where cell range extension (CRE) is a promising technique to improve the cell edge performance and utilize the low power node (LPN) resources more effectively. In this paper we propose a dynamic spectrum allocation scheme for Macro-Pico scenario to mitigate both the co-tier...
Cooperative access among user devices by sharing wireless access bandwidth opens a new paradigm in heterogeneous networks. However, how to stimulate cooperative relay nodes forwarding service data for others and allocating corresponding bandwidth to support it are two key issues in the cooperative access. This paper proposes a Stackelberg game based framework which is benefit participants including...
Dynamic spectrum access (DSA), consisting of spectrum sharing and spectrum trading stage, becomes a promising approach to increase the efficiency of spectrum usage and system performance. In this paper, from the perspective of individual interest optimization, we focus on strategy adaptation of network users and their interaction in spectrum trading process. Considering adverse effects on decision-making...
In this paper, a novel scheduling scheme is proposed for multiple traffic classes to exploit multiuser diversity of the non-real-time (NRT) traffic. The proposed scheduling algorithm consists of two stages, i.e. at the first scheduling stage, the inter-traffic scheduler dynamically allocates the bandwidth resources to each traffic class by a periodic and triggered way with the objective of maximizing...
Pervasive computing, which requires applications composed of independent and distributed components, is an important domain for dynamic ubiquitous heterogeneous environment. However, one of the critical challenges it faces is resource allocation. To overcome the difficulty, enhanced universal service terminal (UST+) is designed as a reflective middleware combined distributed components with particular...
A novel cross layer scheduling algorithm is proposed for real-time (RT) traffic in multiuser downlink multiple-input multiple-output orthogonal frequency division multiple access (MIMO-OFDMA) wireless systems. The algorithm dynamically allocates resources in space, time and frequency domain based on channel state information (CSI), users' quality of service (QoS) requirements and queue state information...
Efficient radio resource allocation is essential to provide quality of service (QoS) for wireless networks. In this article, a cross-layer resource allocation scheme is presented with the objective of maximizing system throughput, while providing guaranteed QoS for users. With the assumption of a finite queue for arrival packets, the proposed scheme dynamically allocates radio resources based on user's...
Clustering is an important method in the mobile Ad-hoc network(MANET). As a result of their mobility, the cluster selection is inevitable for the mobile nodes during their roaming between the different clusters. In this study, based on the analysis of the cluster-selecting problem in the environment containing multiple clusters, which are overlaying and intercrossing, a novel dynamic selecting mechanism...
Wireless sensor networks are being widely researched and are expected to be used in several scenarios. On the leading edge of treads, on-demand, high-reliability, and low-latency routing protocol is desirable for indoor environment applications. This article proposes a routing scheme called robust multi-path routing that establishes and uses multiple node-disjoint routes. Providing multiple routes...
One of the major challenges for beyond third generation mobile systems is efficient mobility management. This paper proposes a distributed dynamic management scheme of handoff based on B3G networks. This scheme can reduce the cost of update signalling and transmitting packets, and improve the system capability. In this scheme, the dynamic building network approach is adopted to deduce the-update signalling...
Based on a discussion of the requirements for the multiple acess control protocol of beyond third-generation mobile systems, we in this paper articulate the needs of the new multiple acess control protocol with support of high-speed transmission and guaranteed quality of service, for voice, video and audio. In light of these, we present the design of a new multiple acess control protocol, called intelligent...
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