Yuhong Li

Beijing University of Posts and Telecommunications, Beijing, Beijing Shi, China

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Publications (7)0.92 Total impact

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    Feng Gao, Yuhong Li, Li Han, Jian Ma
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    ABSTRACT: This paper proposes a novel personalized news recommendation system named InfoSlim. The new system uses semantic technique to annotate news items and user preference in order to add rich metadata information into traditional keyword vector. By doing this, the similarity measure between item profile and user profile can be done by not only lexical-level cosine-based method but also by semantic-level ontology-based method. Such recommendation method can efficiently improve the accuracy of recommendation and therefore can better reflect user's interest and save mobile resources.
    Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on; 10/2009
  • Chaohui Wang, Yuhong Li, Li Han, Jian Ma
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    ABSTRACT: With the constant development of multimedia technologies and mobile devices, the demand of transmitting multimedia streams to mobile devices will be one of the major applications in wireless networks. But the categories of devices and user preference vary widely. How to provide appropriate multimedia streams to mobile terminals and how to process the received multimedia content in the user side will be a potential application for content providers and service operators. In this paper, we propose a context-aware multimedia multicast approach which is composed of two sides - server side and client side to deal with the above problems. This approach can not only decrease the frequencies between server side and client side in wireless environment but also decrease the initiative manual user intervention.
    Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on; 10/2009
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    ABSTRACT: With the increase of the networking functions of the mobile handheld devices, today there is a strong need for receiving multimedia through mobile handheld devices. However, the current streaming technologies cannot well satisfy the users' need due to the large network bandwidth requirement and high price. And the infrastructure of broadcasting oriented for a mobile handheld device, such as DVB-H, are not yet popular in the daily life.
    International Journal of Distributed Sensor Networks 01/2009; · 0.92 Impact Factor
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    Zhan Shi, Yuhong Li, Li Han, Jian Ma
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    ABSTRACT: Nowadays user behavior perception becomes more and more important in scientific experiments and people’s daily lives, especially in mobile services. This paper presents a model which can be used to perceive user’s behavior on intelligent mobile terminals based on Markov process. The model combines the syntax model and the probability transition model, and introduces also other parameters like weight. It can perceive users behavior through different kinds of contexts, such as users’ reading history. According to the perceived behavior, the model can better perceive the user’s behavior, and therefore allows better mobiles services experiences to users. A system architecture based on the presented model has been introduced and implemented, and a verification method of the model has also been given.
    Web Information Systems and Mining, International Conference, WISM 2009, Shanghai, China, November 7-8, 2009. Proceedings; 01/2009
  • Changxing Shen, Yuhong Li, Jian Ma
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    ABSTRACT: The packet forwarding algorithms in the existing geographical location based Ad Hoc routing protocols consider only one factor that influences the performance of the routing protocols. Therefore, the performance of these protocols is not good enough. In this paper, we present a new packet forwarding algorithm--Universal Weighted Greedy (UWG) algorithm, which takes two factors into account. The two factors are the distance of next hop and destination, and the angel that the next hop deviates the beeline between source and destination node. The algorithm has good universality and can improve the routing performance because the two considered factors are critical factors for routing. In the following paper, first the design principle of geographical location based Ad Hoc routing protocol is introduced and the packet forwarding algorithms in some typical routing protocols are reviewed. Then the principle of the UWG algorithm is elaborated. We simulate the UWG algorithm and determine the parameter scope when the performance of the routing protocol is optimal.
    Proceedings of the 5th WSEAS international conference on Applied computer science; 04/2006
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    JIUJUN CHENG, YUHONG LI, JIAN MA
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    ABSTRACT: With the increasing diversity and quantity of mobile terminals, the demand of new applications in the mobile networks has become increasingly high. However, due to the limitations of mobile devices, such as bandwidth, storage, and computation capability, and unpredictable connectivity, the development of new applications is restricted. In order to address this problem, we present a new scalable and reliable mobile P2P network architecture which is composed of cellular Ad Hoc network, wireless access network and 3G core network. Our objective is to emphasize both scalability and reliability issues of searching sharing resource index information in a cost effective way. In this system, an index server is connected with a GGSN in each PLMN to provide the sharing resource index information. We have evaluated the proposed system by comparing the index server searching mechanism with the general flooding searching mechanism. The results show that our design significantly improves the energy cost and the system scalability.
    01/2006;
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    ABSTRACT: In P2P network, there are a considerable proportion of free riders, which contribute nothing or little to the P2P system but obtain resources from the system. In order to address this problem, we present a utility-based auction cooperation incentive mechanism in the P2P network. Our approach is that before communicating with destination peer, the source peer first demands peers to auction their utilities, and then select the maximum utility as its destination peer, and gives some benefit to it, at the same time, gives some punishment to the liars. By using this mechanism, the more the peers contribute to the system, the more utility the peers can obtain, and therefore, the more benefits the peers can gain from the system. The experiment results show that the incentive mechanism assures the justice of gaining benefits for different kinds of peers in the system, and hence, controls the free riders effectively, and improves the whole performance of the P2P network.
    Emerging Directions in Embedded and Ubiquitous Computing, EUC 2006 Workshops: NCUS, SecUbiq, USN, TRUST, ESO, and MSA, Seoul, Korea, August 1-4, 2006, Proceedings; 01/2006