{"title":"Sleep-Wakeup Algorithms for Virtual Barriers of Wireless Sensor Networks in 3D Space","authors":"Junzhao Du, Chang Liu, Hui Liu, Kewei Sha","doi":"10.1109/MSN.2010.13","DOIUrl":"https://doi.org/10.1109/MSN.2010.13","url":null,"abstract":"In order to maximize the lifetime of wireless sensor networks, while ensuring the monitoring quality for specific applications, we develop the sleep-wakeup algorithms for the sensor networks. Firstly, for the three-dimensional wireless sensor networks, we formulate the virtual barrier coverage problems. Secondly, the design and implementation of the nodes sleep-wakeup scheduling algorithm, FWP, to maximize the covering time of a single virtual barrier and the k-virtual barriers sleep-wakeup scheduling algorithm, OBP, to maximize the network coverage time of k virtual barriers are presented. Finally, through the comprehensive simulation, the effectiveness of the algorithms is validated. The relationships among the density of the virtual barriers, virtual lattice point, the number of sensors and the sensing radius are also investigated and simulated.","PeriodicalId":424337,"journal":{"name":"2010 Sixth International Conference on Mobile Ad-hoc and Sensor Networks","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127284044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Movement Assisted Sensor Deployment in Directional Sensor Networks","authors":"Chiu-Kuo Liang, Meng-Chia He, Chih-Hung Tsai","doi":"10.1109/MSN.2010.42","DOIUrl":"https://doi.org/10.1109/MSN.2010.42","url":null,"abstract":"A directional sensor network is composed of many directional sensor nodes. Unlike conventional omni-directional sensors that always have an omni-angle of sensing range, directional sensors may have a limited angle of sensing range due to technical constraints or cost considerations. Area coverage is still an essential issue in a directional sensor network. In this paper, we study the area coverage problem in directional sensor networks with mobile sensors, which can move to the correct places to get high coverage. We present distributed self-deployment schemes of mobile sensors. After sensors are randomly deployed, each sensor calculates its next new location to move in order to obtain a better coverage than previous one. The locations of sensors are adjusted round by round so that the coverage is gradually improved. Based on circumcenter and incenter of sensing direction of the directional sensors, we design two schemes, namely Circumcenter-based and Incenter-based schemes respectively, to guide the moving direction. Simulation results show the effectiveness of our schemes in term of the coverage improvement.","PeriodicalId":424337,"journal":{"name":"2010 Sixth International Conference on Mobile Ad-hoc and Sensor Networks","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126822418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Statistical QoS Provisioning in Mobile Ad Hoc Networks","authors":"X. Dong, D. Wu, Yu Liu, Chi Zhou","doi":"10.1109/MSN.2010.26","DOIUrl":"https://doi.org/10.1109/MSN.2010.26","url":null,"abstract":"In this work, we establish a general framework for investigating statistical QoS provisioning in mobile ad hoc networks. Though the throughput and average delay in wireless ad hoc works have been has been intensively studied in the literature, statistical delay guarantee provisioning in large scale ad hoc networks has not received enough attention. A real time application, e.g., interactive game and real time video, requires stringent delay (delay bound) but may allow a small probability of outage (deadline violation probability). This motivates us to study the relationship among throughput, delay bound and deadline violation probability. We propose to use a triplet $(T, B, R)$, where $T,B,R$ denote throughput, delay bound and deadline violation probability (or, equivalently, the reliability index) respectively, to describe the delay constrained performance of a mobile ad hoc network. Both i.i.d. mobility model and random walk model are adopted to illustrate the tradeoffs among these performance metrics. Since the relation between delay bound and deadline violation probability can be interpreted as a description of the reliability of delay-sensitive communications, our results provide insights into understanding the delay constrained performance of large scale wireless ad hoc networks.","PeriodicalId":424337,"journal":{"name":"2010 Sixth International Conference on Mobile Ad-hoc and Sensor Networks","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121896386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Dynamic Dual-Rate Beacon Scheduling Method of ZigBee/IEEE 802.15.4 for Target Tracking","authors":"Shantao Chen, Luís Almeida, Zhi Wang","doi":"10.1109/MSN.2010.22","DOIUrl":"https://doi.org/10.1109/MSN.2010.22","url":null,"abstract":"ZigBee/IEEE 802.15.4 beacon-enabled mode allows low duty-cycle operation with high energy saving in the wireless sensor network. However, low duty cycles introduce higher end-to-end delay in event propagation and generally lower reactivity of the network with respect to the actual sensing. In target tracking systems, both qualities should be satisfied, namely, low energy consumption while no target is being tracked and low end-to-end delay in target tracking mode. Hence, we need to define a trade-off between the energy consumption and the end-to-end delay. In this paper, we propose a dynamic dual-rate beacon scheduling method with two rate switching schemes modifying ZigBee/IEEE 802.15.4 to enhance its real-time property but still maintain the advantage of low energy consumption. We evaluate our scheme through a simulation using the OPNET simulator. The results show that our scheme exhibits low energy consumption while presenting reduced end-to-end delay, outperforming usual single rate working modes.","PeriodicalId":424337,"journal":{"name":"2010 Sixth International Conference on Mobile Ad-hoc and Sensor Networks","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129290580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"User-Level Packet Filter for the IP Address Abuse/Counterfeit Problem in Wireless/Wired Networks","authors":"Youseck Yang, Huai-Jen Liu","doi":"10.1109/MSN.2010.45","DOIUrl":"https://doi.org/10.1109/MSN.2010.45","url":null,"abstract":"It is used to identify users¡¦ connections by using the source IP addresses in the traffic log inside a firewall. In the case with pre-assigned IP addresses, the mapping relationship between IP addresses and users is fixed. However, an IP address can be counterfeited or abused. Therefore, an evil user can do any wicked network behavior with others¡¦ IP addresses when they get off work or take off. Users who originally own the source IP addresses become victims. In case with dynamically assigned IP addresses, it is more difficult for network managers to identify the user of a connection. In a wireless environment, although some authentication mechanisms may be applied, they are, however, used just to control the wireless access right, instead of to authorize the network behavior of a user. It is much more difficult for network managers to identify the user of a connection. In this paper, a user-level packet filter for wireless/wired networks is proposed. Any user must be authorized and register with the user¡¦s current IP address such that the user can use the Internet service. The proposed user-level packet filter solves IP address counterfeit problem. Little overhead is added but without degrading the performance too much.","PeriodicalId":424337,"journal":{"name":"2010 Sixth International Conference on Mobile Ad-hoc and Sensor Networks","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129313986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yuanfang Chen, Shaojie Tang, Xiangyang Li, Min Gyung Kwak, Cheng Wang, Lei Wang
{"title":"SFL: Energy-Aware Spline Function Localization Scheme for Wireless Sensor Networks","authors":"Yuanfang Chen, Shaojie Tang, Xiangyang Li, Min Gyung Kwak, Cheng Wang, Lei Wang","doi":"10.1109/MSN.2010.24","DOIUrl":"https://doi.org/10.1109/MSN.2010.24","url":null,"abstract":"Localization problem in wireless sensor networks (WSNs) has been widely studied recently. However, most previous work simply assume that all the nodes stay awake during the localization phase. This assumption clearly overlooks the common scenario that sensor nodes are usually duty-cycled in order to save energy. In this paper we propose a kind of novel DV (distance vector)-based localization algorithm which performs pretty good in duty-cycled network. In order to get a good localization accuracy, the DV-based positioning algorithms need to keep a critical minimum average neighborhood size (CMANS) for every sensor node. However, in the time-varying connectivity (TVC) (this phenomenon results from duty-cycling) network, it is difficult to keep CMANS for every node all the time. We can use CKN sleep scheduling algorithm to tackle this problem. CKN sleep scheduling algorithm can save energy while keeping certain CMANS. We further propose a novel localization algorithm: Spline Function Localization (SFL) algorithm which guarantees high accuracy even under small neighborhood size. Finally, we estimate the performance of our algorithm and compare with several classical DV-based localization algorithms (DVHOP and HCRL (Hop-Count-Ratio based Localization)) in simulation. Experimental results confirm that our algorithm has much higher accuracy under duty-cycled network.","PeriodicalId":424337,"journal":{"name":"2010 Sixth International Conference on Mobile Ad-hoc and Sensor Networks","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128874121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"An Adaptive Cross-Layer Design for Prioritized Traffic in Wireless Communications","authors":"G. Pradeep, E. Ngai","doi":"10.1109/MSN.2010.37","DOIUrl":"https://doi.org/10.1109/MSN.2010.37","url":null,"abstract":"Duty cycles have been widely studied recently to reduce the energy consumption for wireless communications. Although duty cycles can effectively reduce energy consumption, they may also increase the packet delay as the packets can only be forwarded when the next hop is awake. The mechanism is hence not suitable for delivering urgent messages. In this paper, we propose an adaptive cross-layer design for delivering prioritized traffic in wireless communications. Our cross-layer design integrates a modified X-MAC protocol with our generalized Random Re-Routing protocol coherently. Duty cycles will be applied if there is only ordinary traffic in the network. When high priority data are present, duty cycles will be disabled and priority routing will be employed. We generalize the QoS-aware Random Re-Routing protocol to support data with multiple priority levels. Different routing policies and transmission power will be selected according to the priority levels of the data packets. Extensive simulations have been conducted in OMNET++ to evaluate the performance of our system. The results demonstrate that our design can achieve both satisfactory packet delay and energy consumption.","PeriodicalId":424337,"journal":{"name":"2010 Sixth International Conference on Mobile Ad-hoc and Sensor Networks","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116462062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alexandru Popescu, D. Erman, M. Fiedler, D. Kouvatsos
{"title":"A Multi-reality Approach to CRN Data Representation","authors":"Alexandru Popescu, D. Erman, M. Fiedler, D. Kouvatsos","doi":"10.1109/MSN.2010.36","DOIUrl":"https://doi.org/10.1109/MSN.2010.36","url":null,"abstract":"Cognitive Radio Networks (CRNs) are emerging as a viable solution for exploiting the available spectrum and solving overcrowding in the operating bands. Several dimensions in the process of identification, management and routing need to be handled to overcome the challenges associated with the management of CRNs. A very important topic in achieving an effective and flexible management solution is related to the data representation of the different CRN dimensions. Scalability, high tolerance to churn and low latencies in accessing the stored data are fundamental characteristics in order to keep up with the dynamic nature of a mobile environment. Accordingly, to achieve a robust data representation that can handle all these requirements in an efficient way we focus our attention on peer-to-peer (P2P) systems. These systems are well known for providing an efficient platform to develop scalable and robust applications. Hence, in this paper we investigate using geometric multi-dimensional data representation and addressing system based on basic CAN functionality. Results obtained in our experiments are reported, providing useful information to improve the resilience to churn of our system.","PeriodicalId":424337,"journal":{"name":"2010 Sixth International Conference on Mobile Ad-hoc and Sensor Networks","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132156360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Mitigate the Bottleneck of Underwater Acoustic Sensor Networks via Priority Scheduling","authors":"Junjie Xiong, Michael R. Lyu, K. Ng","doi":"10.1109/MSN.2010.14","DOIUrl":"https://doi.org/10.1109/MSN.2010.14","url":null,"abstract":"Underwater acoustic sensor networks (UWASNs) are composed of underwater sensors that use sound to transmit information collected in the ocean. Since the sound speed is lower than radio wave, UWASNs suffer from much lower throughput and higher delay compared with terrestrial wireless sensor networks (TWSNs). Current methods manage to alleviate the bottleneck by replacing mutual handshakes with reservation mechanisms that consume lower overhead. However, their throughput improvement and delay reduction are very limited (e.g., the throughput is only 30% of the theoretical maximum for TLohi in 8-node networks), and most of their analysis and simulations are based on single-hop communication. In this work, we tackle the above challenges by proposing a priority scheduling approach for multi-hop topologies. First, we find that the scheduling problem of UWASNs is very different from that of TWSNs, and analyze the shortest schedule for the whole UWASN. Then, we design an efficient priority scheduling protocol at the MAC layer. Our approach performs parallel transmissions and prioritizes the scheduling by allocating longer time to heavier-traffic nodes. We have conducted extensive evaluations which show that the proposed protocol not only improves the throughput and delay performance greatly, but also benefits the fairness.","PeriodicalId":424337,"journal":{"name":"2010 Sixth International Conference on Mobile Ad-hoc and Sensor Networks","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127849101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Maximizing Lifetime of Sensor Surveillance Systems with Directional Sensors","authors":"Xiang Cao, X. Jia, Guihai Chen","doi":"10.1109/MSN.2010.23","DOIUrl":"https://doi.org/10.1109/MSN.2010.23","url":null,"abstract":"In this paper, we address the maximal lifetime scheduling problem in sensor surveillance systems with directional sensors. The sensors are directional in sensing objects (or watching targets) and their sensing orientations can be adjusted dynamically. Given a set of sensors and a set of targets in a plane, each target needs to be watched all the time and a sensor can watch all the targets within its sensing range. The problem of our concern is to schedule the sensors to watch all the targets and transmit the sensed data to the base station, such that the lifetime of this surveillance system is maximized. The lifetime is the duration up to the time when there exists a target that cannot be watched by any sensor or the sensed data cannot be transmitted to the base station due to the depletion of energy of some sensors. This problem is NP-hard. We propose a heuristic method that divides the system lifetime into sessions and the sensors are scheduled to work in turn in these sessions. The heuristic method consists of two steps: 1) selecting sensors to work for each session, 2) scheduling the length of each session such that the total working time for all sessions is maximized. Extensive simulations have been conducted to demonstrate that our proposed method can significantly improve the lifetime of the system.","PeriodicalId":424337,"journal":{"name":"2010 Sixth International Conference on Mobile Ad-hoc and Sensor Networks","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122329548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}