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The next generation wireless network (NGWN) is envisioned as convergence of heterogeneous wireless networks. The vertical handoff plays an important role in supporting the service continuity and guaranteeing the quality of service (QoS). How to select the target network becomes the vital issue of designing the vertical handoff algorithm. In this paper, we propose a novel service-adaptive multi-criteria...
The problem of distributed coordination in multi-cell wireless network has been concerned in the research community recently due to its ability to enhance intended signal and mitigate interference in the system. In the previous research, the design of beamforming weights at transmitter has been addressed from the perspective of egoism and altruism concepts considering the tradeoff between egoistic...
In order to solve the problem that the existing resource allocation strategies cannot give integrative consideration to QoS, spectrum efficiency for mixed traffic, this paper proposes a utility-based resource allocation algorithm for mixed traffic in wireless networks. The unified utility function for users with different traffics is studied first. After that, the optimization model for the resource...
This letter considers the multiuser amplify-and-forward relay network, which includes the source-to-destination links. We derive an approximate expression in closed-form for the exact outage probability in Rayleigh fading channels. In the high signal-to-noise ratio regime, we derive a simple expression to approximate the asymptotic outage probability and analyze the diversity performance. The analysis...
The use of multicasting over multi-hop networks seems an attractive new way to provide support to real-time applications like video streaming. In this paper, we proposed a 2-hop Dual Amplify-and-Forward (DAF) relay scheme. In this scheme, only the intermediate nodes (relay nodes) can cooperate with each other and there is no cooperation between transmitting and receiving nodes. This scheme has achieved...
User cooperation is employed to explore the inherent distributed spatial diversity priority of wireless network. Nodes based rather than linked based protocol is employed and the broadcast nature of radio network is considered by user cooperation. However cooperative partner selection might be difficult especially for nomadic cooperative networks as it requires partner's additional power consumption...
This paper proposed a novel stochastic programming which formulates the minimum energy cost routing for ad hoc wireless network. We presented the stochastic programming formulation to find the minimum energy cooperative routing in slow fading channel and fast fading channel respectively. The analysis shows that the stochastic programming formulation can optimize the minimum energy cost cooperative...
In the wireless networks, utilization of terminals distributed in space can significantly improve the performance of wireless communication systems. In this paper, we investigate two-hop non-regenerative coded cooperation system and propose a novel design of employing linear dispersion codes (LDC) at the source node and a linear processing matrix at the relays. The relay stations make use of the knowledge...
In wireless networks, node cooperation has been proposed as a strategy to improve communication reliability and system capacity. This paper investigates employing linear dispersion codes (LDC) over non-regenerative MIMO relay system with gain matrix. Gain matrix at the relay is found that increases the capacity between the source and the destination. The relay stations exploit the knowledge of the...
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