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  • Hang Qin, Jun Su
  • 2009 International Symposium on Computer Network…
  • 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)
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)
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)
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 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)
Oil and gas pipelines are the infrastructure of national economic development. Deployment problem of wireless underground sensor networks (WUSN) for oil and gas pipeline systems is a fundamental problem. This paper firstly analyzed the wireless channel characteristics and energy consumption model in near-surface underground soil, and then studied the(More)
With the improvement and maturity of 3G network, the wireless communication rate for the users has become more and more high. Every research institution will focus gradually shift to long term evolution Version (LTE) of 3G network. In this paper, 3GPP LTE security mechanisms are introduced in detailed; the security architecture of LTE/SAE is present; the(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)