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  • Hang Qin, Jun Su
  • 2009
—Cognitive Radio network (CRN) is a network composed of elements that, through learning and reasoning, dynamically adapt to varying network conditions in order to improve spectrum efficiency for wireless networking. To investigate opportunistic scheduling, this paper develops a methodology based on the jointly consideration of the power control and flow(More)
Opportunistic spectrum access (OSA) allows unlicensed users to share licensed spectrum in space and time with no or little interference to primary users, which bring new research challenges in MAC design. In this paper, we firstly introduce the differences between the conventional multi-channel MAC protocols and the MAC protocols for OSA as well as the(More)
Multi-channel MAC protocols have recently been proposed to improve the throughput of wireless networks. In this paper, many multi-channel MAC protocols for wireless networks are studied. The classification standards for multi-channel MAC protocols are firstly described, and then the key mechanisms of the existing representative MAC protocols are analyzed.(More)
To meet the dynamic spectrum access of cognitive radio (CR), the selfish game-theoretic model is identified for multi-hop networking with CR nodes, which matches well with the physical administrative structure in real-life situations. This paper investigates user communication session via a cross-layer optimization approach, with joint consideration of(More)
The UDDI registry model of Web service suffers from users find services voluntarily, and deploy it in time. This paper presents a recommended discovery model of Web services using publish/subscribe technologies. The services resource way to message is published to the distributing model system; the users' personalized requests are stored in local as(More)
This paper sheds light on the artificial mapping schemes for adaptive network collaboration of cognitive radio networks. The analysis shows that the superiority of the DHTbased overlay is due to its link state aggregation property, which establishes global convergence for link state aggregation among a scalable number of nodes. Recognizing that fuzzy logic(More)
This paper proposes a novel reconfiguration management scheme to dramatically improve spectral efficiency and performance in cognitive radio networks. It is very suitable for efficient wireless services in dense spectrum environment. A specific distributed spectrum etiquette protocol called ASCP (Adaptive Spectrum Coordination Protocol) is designed and(More)
Wireless sensor networks are characterized by multihop wireless links and resource constrained nodes. In terms of data collection and forwarding scheduling, this paper investigates the load balancing in sensor nodes and wireless link based on the performance of wireless sensor networks. Leveraging the property of dissimi-larity distribution, a method to(More)
This paper is mainly devoted to identify an evolutionary approach based on search strategy, namely multiobjective evolutionary algorithm for indoor positioning (MEIP). Each subproblem is optimized by information from its several neighboring subproblems, which makes MEIP lower computational complexity at each generation and be capable of determining the user(More)
Rumor routing is a routing protocol based on query for wireless sensor networks, which selects next hop randomly during establishing path and the path may not be optimal and may be loop. So this paper puts forward a novel rumor routing (NRR), which bases on ant colony optimization and can resolve the loop route that established by rumor routing, and has(More)