Peng Sun

Bio: Peng Sun is an academic researcher from University of Science and Technology of China. The author has contributed to research in topics: Wireless sensor network & Key distribution in wireless sensor networks. The author has an hindex of 5, co-authored 6 publications receiving 202 citations.

A RSSI-Based DV-Hop Algorithm for Wireless Sensor Networks

Abstract: Wireless sensor network (WSN) are widely used in many different scenarios. The localization information is crucial for the operation of WSN. There are mainly two types of localization algorithms. The Range-based localization algorithm has strict requirements on hardware, thus is expensive to be implemented in practice. The Range-free localization algorithm reduces the hardware cost. However, it can only achieve high accuracy in ideal scenarios. In this paper, we locate unknown nodes by incorporating the advantages of these two types of methods and propose a new algorithm named the RSSI-based DV-hop algorithm (RDV-hop). Our algorithm improves the localization accuracy compared with previous algorithms, which has been demonstrated by the simulating results.

A Selective Anchor Node Localization Algorithm for Wireless Sensor Networks

Abstract: Wireless sensor network (WSN) are more and more widely used in many different scenarios. The localization information is an important criterion for the capability of WSN. Nowadays, there are many localization algorithms. DV-hop is a classical Range-free localization algorithm, by which unknown nodes can obtain anchors' information within designated hops, and estimate the distances from themselves to anchors. Unknown nodes then use the information to localize themselves. But the estimative distances may incur large error, and will jeopardize the localization precision. In order to solve the problem, we propose a selective anchor node localization algorithm (SANLA) for wireless sensor networks in this paper, and it can make unknown nodes choose three anchors which are the most accurate to execute trilateration. The experiment results illustrate that our algorithm is valid and effective.

A Novel Virtual Anchor Node-Based Localization Algorithm for Wireless Sensor Networks

Abstract: The accuracy of localization is a significant criterion to evaluate the practical utility of localization algorithm in wireless sensor networks. In mostly localization algorithms, one of the main methods to improve localization accuracy is to increase the number of anchor nodes. But the number of anchor nodes is always limited because of the hardware restrict, such as cost, energy consumption and so on. In this paper, we propose a novel algorithm with small extra logical overhead, which uses the shortest-hop path scheme to upgrade virtual anchor nodes, while the real number of physical anchors is the same as before. This algorithm firstly chooses out some special nodes from all the unknown ones to figure out more accurate positions of them, and then makes these ones as new virtual anchor nodes assist other unknowns in localizing together with the real anchors. The simulation results illustrate our algorithm has improved the accuracy of localization greatly.

A Transmission Power Control MAC Protocol for Wireless Sensor Networks

Abstract: Wireless sensor networks have been widely used in many important fields. Medium Access Control (MAC) protocols have a significant effect on the function and performance of sensor networks. At present, most MAC protocols use the same transmission power when sensor nodes send packets. However, the deployment of the sensor nodes is asymmetrical in wireless sensor networks, which will bring more energy consumption and unnecessary collisions. By jointing the MAC layer and physical layer of the senor nodes, and based on Sensor MAC (SMAC) [1] protocol, we propose a transmission power control MAC protocol in wireless sensor networks (transmission Power control in SMAC, PSMAQ. The simulation results show that, compared with the SMAC protocol, our protocol has improved a lot in the delay of packets, reception rate, energy consumption and throughput of the networks.

A Novel Energy Efficient Wireless Sensor MAC Protocol

Abstract: Wireless sensor networks (WSN) have been widely used in many important areas. Medium access control (MAC) protocols have a significant influence on the function and performance of WSN. In existing protocols such as sensor MAC (SMAC), the sensor nodes reduce energy consumption by introducing an active/sleep duty cycle, which always leads to more control packets. These control packets waste a lot of energy. Other contention-based MAC protocols either cannot solve the idle listening or fail to consider the complexity of the protocol. Based on SMAC, we propose a novel contention-based MAC protocol, which decreases the control packets by modifying the control packets message and canceling time synchronization. The simulation result indicates that the performance of our protocol is much better than that of SMAC protocol in energy consumption.

Method for determination of wireless terminals positions and associated system and apparatus thereof

Abstract: Conventional position estimation methods require the deployment of more fixed anchors in order to increase the accuracy in a crowded indoor environment, or they suffer from inaccuracies due to multipath fading. The present invention overcomes the problems associated with the prior arts by selecting one or more mobile nodes as virtual anchors when estimating the position of a target mobile node. This takes advantage of the fact that mobile nodes are closer to the target mobile node than the access points in most typical deployments, thus eliminating the need to deploy more access points or fixed anchors for the purpose of position determination. After obtaining an initial estimate of the position of the target mobile node, the target mobile node can serve as virtual anchors to estimate the positions of other mobile nodes, which can then be used to further refine the position estimate of the target mobile node.

DuRT: Dual RSSI Trend Based Localization for Wireless Sensor Networks

Abstract: Localization is a key issue in wireless sensor networks. The geographical location of sensors is important information that is required in sensor network operations such as target detection, monitoring, and rescue. These methods are classified into two categories, namely range-based and range-free. Range-based localizations achieve high location accuracy by using specific hardware or using absolute received signal strength indicator (RSSI) values, whereas range-free approaches obtain location estimates with lower accuracy. Because of the hardware and energy constraints in sensor networks, RSSI offers a convenient method to find the position of sensor nodes. However, in the presence of channel noise, fading, and attenuation, it is not possible to estimate the actual location. In this paper, we propose an RSSI-based localization scheme that considers the trend of RSSI values obtained from beacons to estimate the position of sensor nodes. Through applying polynomial modeling on the relationship between received RSSI and distance, we are able to locate the maximum RSSI point on the anchor trajectory. Using two such trajectories, the sensor position can be determined by calculating the intersection point of perpendiculars passing through the maximum RSSI point on each trajectory. In addition, we devised schemes to improve the localization method to perform under a variety of cases such as single trajectory, unavailability of RSSI trends, and so. The advantage of our scheme is that it does not rely on absolute RSSI values and hence, can be applied in dynamic environments. In simulations, we demonstrate that the proposed localization scheme achieves higher location accuracy compared with existing localization approaches.

Wireless sensor networks localization algorithms: a comprehensive survey

Abstract: Wireless sensor networks (WSNs) have recently gained a lot of attention by scientific community. Small and inexpensive devices with low energy consumption and limited computing resources are increasingly being adopted in different application scenarios including environmental monitoring, target tracking and biomedical health monitoring. In many such applications, node localization is inherently one of the system parameters. Localization process is necessary to report the origin of events, routing and to answer questions on the network coverage ,assist group querying of sensors. In general, localization schemes are classified into two broad categories: range-based and range-free. However, it is difficult to classify hybrid solutions as range-based or range-free. In this paper we make this classification easy, where range-based schemes and range-free schemes are divided into two types: fully schemes and hybrid schemes. Moreover, we compare the most relevant localization algorithms and discuss the future research directions for wireless sensor networks localization schemes.

Proceedings of the 5th International Conference on Networking

Abstract: Networking became the key economical factor in bridging countries and cultures, speeding the economy, and synchronizing the research topics across multi-national groups and universities. The International Conference on Networking (ICN) held in Mauritius, April 23-28, 2006 became now a reference in the networking community and provided an international forum for discussions between researchers, practitioners and students interested in new developments targeting all areas of networking. ICN 2006 was the 5th conference of this successful series and was organized and technically co-sponsored by the IEEE, IEE and IARIA organizations with proceedings published by the IEEE Computer Society Press. As with the previous editions, this event continued to be very competitive in its selection process and very well perceived by the international networking community. As such, it is attracting excellent contributions and active participation from all over the world. This year more than 390 submissions were reviewed by the members of the technical program committee and about 40% were finally accepted for presentation at the conference. We were very pleased to receive a large amount of top quality contributions. The accepted papers cover a wide range of networking related topics spanning from VoIP, NAT and SIP to OLSR, DDoS, H.264, QoS, policy traffic management and routing. We believe that the ICN-2006 papers offered a large panel of solutions to key problems in all areas of networking and set challenging directions for industrial research and development.