Traditional mesh is a popular interconnection architecture for Networks-on-Chip (NoCs). However, with the trend towards larger number of cores in chip multiprocessors, it is unable to stand the fast-growing diameter and average distance in meshes. Recently, concentration and express channels are two countermeasures for that. In this paper, a new scheme called multi-mapping is proposed, which allows one processing element (PE) to be connected to multiple routers, and vice versa. By properly establishing the mapping relationships between PE and router, both diameter and average distance of the network are lowered while the interconnections between routers are not altered. To provide efficient and in-order communication in NoCs, we develop the X¡Y routing scheme with wormhole-switching technique used in multi-mapping meshes. The simulation results are presented to show the effectiveness of our method by comparing with traditional meshes and mesh-based express cubes under different traffic patterns.
{"title":"Multi-mapping Meshes: A New Communicating Fabric for Networks-on-Chip","authors":"Xinyu Wang, D. Xiang","doi":"10.1109/ICPADS.2010.23","DOIUrl":"https://doi.org/10.1109/ICPADS.2010.23","url":null,"abstract":"Traditional mesh is a popular interconnection architecture for Networks-on-Chip (NoCs). However, with the trend towards larger number of cores in chip multiprocessors, it is unable to stand the fast-growing diameter and average distance in meshes. Recently, concentration and express channels are two countermeasures for that. In this paper, a new scheme called multi-mapping is proposed, which allows one processing element (PE) to be connected to multiple routers, and vice versa. By properly establishing the mapping relationships between PE and router, both diameter and average distance of the network are lowered while the interconnections between routers are not altered. To provide efficient and in-order communication in NoCs, we develop the X¡Y routing scheme with wormhole-switching technique used in multi-mapping meshes. The simulation results are presented to show the effectiveness of our method by comparing with traditional meshes and mesh-based express cubes under different traffic patterns.","PeriodicalId":365914,"journal":{"name":"2010 IEEE 16th International Conference on Parallel and Distributed Systems","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124634600","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}
In this paper, we propose a taxonomy that characterizes and classifies different components of autonomic application management in Grids. We also survey several representative Grid systems developed by various projects world-wide to demonstrate the comprehensiveness of the taxonomy. The taxonomy not only highlights the similarities and differences of state-of-the-art technologies utilized in autonomic application management from the perspective of Grid computing, but also identifies the areas that require further research initiatives.
{"title":"A Taxonomy of Autonomic Application Management in Grids","authors":"Mustafizur Rahman, R. Ranjan, R. Buyya","doi":"10.1109/ICPADS.2010.89","DOIUrl":"https://doi.org/10.1109/ICPADS.2010.89","url":null,"abstract":"In this paper, we propose a taxonomy that characterizes and classifies different components of autonomic application management in Grids. We also survey several representative Grid systems developed by various projects world-wide to demonstrate the comprehensiveness of the taxonomy. The taxonomy not only highlights the similarities and differences of state-of-the-art technologies utilized in autonomic application management from the perspective of Grid computing, but also identifies the areas that require further research initiatives.","PeriodicalId":365914,"journal":{"name":"2010 IEEE 16th International Conference on Parallel and Distributed Systems","volume":"211 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116154943","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}
The efficiency of communication is a key factor to the performance of networking applications, and concurrent communication is an important approach to the efficiency of communication. However, many concurrency opportunities are very difficult to exploit because they depend on some undeterministic conditions. If these conditions are highly predictable, speculative execution can be a very effective approach to cope with the uncertainties. Existing researches on speculation seldom target at networking systems, and none of them can handle the event-driven model that is very popular in such systems. In this paper, we propose Nexus, a novel speculation scheme that supports event-driven networking applications. Nexus analyzes the dependence relationship of events, and performs speculation according to the duality of events and threads. Evaluation on a prototype implementation of nexus shows that this approach can significantly reduces the time needed to complete an event-driven program.
{"title":"Nexus: Speculative Execution for Event-Driven Networking Programs","authors":"Huiba Li, Xicheng Lu, Yuxing Peng","doi":"10.1109/ICPADS.2010.113","DOIUrl":"https://doi.org/10.1109/ICPADS.2010.113","url":null,"abstract":"The efficiency of communication is a key factor to the performance of networking applications, and concurrent communication is an important approach to the efficiency of communication. However, many concurrency opportunities are very difficult to exploit because they depend on some undeterministic conditions. If these conditions are highly predictable, speculative execution can be a very effective approach to cope with the uncertainties. Existing researches on speculation seldom target at networking systems, and none of them can handle the event-driven model that is very popular in such systems. In this paper, we propose Nexus, a novel speculation scheme that supports event-driven networking applications. Nexus analyzes the dependence relationship of events, and performs speculation according to the duality of events and threads. Evaluation on a prototype implementation of nexus shows that this approach can significantly reduces the time needed to complete an event-driven program.","PeriodicalId":365914,"journal":{"name":"2010 IEEE 16th International Conference on Parallel and Distributed Systems","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133002887","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}
Tieying Zhang, Zhenhua Li, Xueqi Cheng, Xianghui Sun
For current P2P-VoD systems, three fundamental problems exit in user experience: exceedingly large startup delay, long jump latency, and poor playback continuity. These problems primarily stem from lack of media data. In this paper, we propose Multi-Task Downloading with Bandwidth Control (MTD(BC)), an efficient and practical mechanism to prefetch media data. In MTD, a user can download multiple videos in parallel with its current viewing, which significantly decreases video switching delays. However, MTD brings a serious problem: downloading "other" tasks could impede the playback performance of the current viewing, especially in low-bandwidth network. This problem is solved through our design of bandwidth control. To our knowledge, we are the first to propose MTD with bandwidth control for P2P-VoD and conduct empirical evaluations in the real-world system. The running results show that MTD(BC) achieves better streaming quality than the traditional method. In particular, our mechanism reduces 75% of startup delay and 36% of jump latency in low-bandwidth network with high system scalability.
{"title":"Multi-task Downloading for P2P-VoD: An Empirical Perspective","authors":"Tieying Zhang, Zhenhua Li, Xueqi Cheng, Xianghui Sun","doi":"10.1109/ICPADS.2010.11","DOIUrl":"https://doi.org/10.1109/ICPADS.2010.11","url":null,"abstract":"For current P2P-VoD systems, three fundamental problems exit in user experience: exceedingly large startup delay, long jump latency, and poor playback continuity. These problems primarily stem from lack of media data. In this paper, we propose Multi-Task Downloading with Bandwidth Control (MTD(BC)), an efficient and practical mechanism to prefetch media data. In MTD, a user can download multiple videos in parallel with its current viewing, which significantly decreases video switching delays. However, MTD brings a serious problem: downloading \"other\" tasks could impede the playback performance of the current viewing, especially in low-bandwidth network. This problem is solved through our design of bandwidth control. To our knowledge, we are the first to propose MTD with bandwidth control for P2P-VoD and conduct empirical evaluations in the real-world system. The running results show that MTD(BC) achieves better streaming quality than the traditional method. In particular, our mechanism reduces 75% of startup delay and 36% of jump latency in low-bandwidth network with high system scalability.","PeriodicalId":365914,"journal":{"name":"2010 IEEE 16th International Conference on Parallel and Distributed Systems","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133879325","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}
In wireless sensor networks, how to efficiently use the energy of the nodes while assigning global unique ID to each node is a challenging problem. By analyzing the communication cost of the clustering and topological features of a sensor network, we present a distributed scheme of Energy Efficient Clustering with Self-organized ID Assignment (EECSIA). In the context of EECSIA, a network first selects the nodes in the high-density areas as cluster heads, and then assigns an unique ID to each node based on local information. In addition, EECSIA periodically updates cluster heads according to the nodes' residual energy and density. The method is independent of time synchronization, and it does not rely on the nodes' geographic locations either. Simulation results show that the scheme performs well in terms of cluster scale, and number of nodes alive over rounds.
{"title":"An Energy Efficient Clustering Scheme with Self-Organized ID Assignment for Wireless Sensor Networks","authors":"Qingchao Zheng, Zhixin Liu, Liang Xue, Yusong Tan, Dan Chen, X. Guan","doi":"10.1109/ICPADS.2010.83","DOIUrl":"https://doi.org/10.1109/ICPADS.2010.83","url":null,"abstract":"In wireless sensor networks, how to efficiently use the energy of the nodes while assigning global unique ID to each node is a challenging problem. By analyzing the communication cost of the clustering and topological features of a sensor network, we present a distributed scheme of Energy Efficient Clustering with Self-organized ID Assignment (EECSIA). In the context of EECSIA, a network first selects the nodes in the high-density areas as cluster heads, and then assigns an unique ID to each node based on local information. In addition, EECSIA periodically updates cluster heads according to the nodes' residual energy and density. The method is independent of time synchronization, and it does not rely on the nodes' geographic locations either. Simulation results show that the scheme performs well in terms of cluster scale, and number of nodes alive over rounds.","PeriodicalId":365914,"journal":{"name":"2010 IEEE 16th International Conference on Parallel and Distributed Systems","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132421149","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}
Control decisions of intelligent devices in critical infrastructure can have a significant impact on human life and the environment. Ensuring that the appropriate data is available is crucial for making informed decisions. Such considerations are becoming increasingly important in today's cyber-physical systems that combine computational decision making on the cyber side with physical control on the device side. The job of ensuring the timely arrival of data falls onto the network that connects these intelligent devices. This network needs to be fault tolerant. When nodes, devices or communication links fail along a default route of a message from A to B, the underlying hardware and software layers should ensure that this message will actually be delivered as long as alternative routes exist. Existence and discovery of multi-route pathways is essential in ensuring delivery of critical data. In this work, we present methods of developing network topologies of smart devices that will enable multi-route discovery in an intelligent power grid. This will be accomplished through the utilization of software overlays that (1) maintain a digital structure for the physical network and (2) identify new routes in the case of faults.
{"title":"Fault Tolerant Network Routing through Software Overlays for Intelligent Power Grids","authors":"Christopher Zimmer, F. Mueller","doi":"10.1109/ICPADS.2010.47","DOIUrl":"https://doi.org/10.1109/ICPADS.2010.47","url":null,"abstract":"Control decisions of intelligent devices in critical infrastructure can have a significant impact on human life and the environment. Ensuring that the appropriate data is available is crucial for making informed decisions. Such considerations are becoming increasingly important in today's cyber-physical systems that combine computational decision making on the cyber side with physical control on the device side. The job of ensuring the timely arrival of data falls onto the network that connects these intelligent devices. This network needs to be fault tolerant. When nodes, devices or communication links fail along a default route of a message from A to B, the underlying hardware and software layers should ensure that this message will actually be delivered as long as alternative routes exist. Existence and discovery of multi-route pathways is essential in ensuring delivery of critical data. In this work, we present methods of developing network topologies of smart devices that will enable multi-route discovery in an intelligent power grid. This will be accomplished through the utilization of software overlays that (1) maintain a digital structure for the physical network and (2) identify new routes in the case of faults.","PeriodicalId":365914,"journal":{"name":"2010 IEEE 16th International Conference on Parallel and Distributed Systems","volume":"41 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121010049","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}
Many large-scale scientific applications feature distributed computing workflows of complex structures that must be executed and transferred in shared wide-area networks consisting of unreliable nodes and links. Mapping these computing workflows in such faulty network environments for optimal latency while ensuring certain fault tolerance is crucial to the success of eScience that requires both performance and reliability. We construct analytical cost models and formulate workflow mapping as an optimization problem under failure rate constraint. We propose a distributed heuristic mapping solution based on recursive critical path to achieve minimum end-to-end delay and satisfy a pre-specified overall failure rate for a guaranteed level of fault tolerance. The performance superiority of the proposed mapping solution is illustrated by extensive simulation-based comparisons with existing mapping algorithms.
{"title":"A Distributed Workflow Mapping Algorithm for Minimum End-to-End Delay under Fault-Tolerance Constraint","authors":"C. Wu, Yi Gu","doi":"10.1109/ICPADS.2010.38","DOIUrl":"https://doi.org/10.1109/ICPADS.2010.38","url":null,"abstract":"Many large-scale scientific applications feature distributed computing workflows of complex structures that must be executed and transferred in shared wide-area networks consisting of unreliable nodes and links. Mapping these computing workflows in such faulty network environments for optimal latency while ensuring certain fault tolerance is crucial to the success of eScience that requires both performance and reliability. We construct analytical cost models and formulate workflow mapping as an optimization problem under failure rate constraint. We propose a distributed heuristic mapping solution based on recursive critical path to achieve minimum end-to-end delay and satisfy a pre-specified overall failure rate for a guaranteed level of fault tolerance. The performance superiority of the proposed mapping solution is illustrated by extensive simulation-based comparisons with existing mapping algorithms.","PeriodicalId":365914,"journal":{"name":"2010 IEEE 16th International Conference on Parallel and Distributed Systems","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126826252","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}
Conventional privilege separation can effectively reduce the TCB size by granting privilege to only the privileged compartments. However, since they this approach relies on process isolation to ensure security assurance, malware exploiting against kernel components can easily compromise. Meanwhile, the frequent inter-process communications between separated processes inevitably incur notable overhead. To ameliorate these problems, we propose to perform privilege separation without partitioning application into two processes. Instead, we leverage virtualization to enforce the isolation of sensitive portions from other untrusted code. The virtual machine monitor intercepts all the code context switches transparently without requiring the application to explicitly use IPC as privilege context transition. We have implemented a prototype of our system, named Coir, based on commodity hyper visor Xen. Evaluation of our prototype includes a real-world remote control application, which is partitioned and protected in oir-enabled hyper visor on unmodified Windows XP. We discuss the isolation strength as well as the performance penalty of our system based on the practical case.
{"title":"Enhanced Privilege Separation for Commodity Software on Virtualized Platform","authors":"Mingyuan Xia, Miao Yu, Qian Lin, Zhengwei Qi, Haibing Guan","doi":"10.1109/ICPADS.2010.96","DOIUrl":"https://doi.org/10.1109/ICPADS.2010.96","url":null,"abstract":"Conventional privilege separation can effectively reduce the TCB size by granting privilege to only the privileged compartments. However, since they this approach relies on process isolation to ensure security assurance, malware exploiting against kernel components can easily compromise. Meanwhile, the frequent inter-process communications between separated processes inevitably incur notable overhead. To ameliorate these problems, we propose to perform privilege separation without partitioning application into two processes. Instead, we leverage virtualization to enforce the isolation of sensitive portions from other untrusted code. The virtual machine monitor intercepts all the code context switches transparently without requiring the application to explicitly use IPC as privilege context transition. We have implemented a prototype of our system, named Coir, based on commodity hyper visor Xen. Evaluation of our prototype includes a real-world remote control application, which is partitioned and protected in oir-enabled hyper visor on unmodified Windows XP. We discuss the isolation strength as well as the performance penalty of our system based on the practical case.","PeriodicalId":365914,"journal":{"name":"2010 IEEE 16th International Conference on Parallel and Distributed Systems","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132858644","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}
Chao Jin, D. Feng, Hong Jiang, Lei Tian, Jingning Liu, Xiongzi Ge
Parity redundancy is widely employed in RAID-structured storage systems to protect against disk failures. However, the small-write problem has been a persistent root cause of the performance bottleneck of such parity-based RAID systems, due to the additional parity update overhead upon each write operation. In this paper, we propose a novel RAID architecture, TRIP, based on the conventional parity-based RAID systems. TRIP alleviates the small-write problem by integrating and exploiting the temporal redundancy (i.e., snapshots and logs) that commonly exists in storage systems to protect data from soft errors while boosting write performance. During the write-intensive periods, TRIP can reduce the penalty of each small-write request to as few as one device IO operation, at a minimal cost of maintaining the temporal redundant information. Reliability analysis, in terms of Mean Time to Data Loss (MTTDL), shows that the reliability of TRIP is only marginally affected. On the other hand, our prototype implementation and performance evaluation demonstrate that TRIP significantly outperforms the conventional parity-based RAID systems in data transfer rate and user response time, especially in write-intensive environments.
奇偶校验冗余被广泛应用于raid结构的存储系统中，以防止磁盘故障。然而，小写入问题一直是这种基于奇偶校验的RAID系统性能瓶颈的持久根源，因为每次写入操作都会产生额外的奇偶校验更新开销。本文在传统的基于奇偶校验的RAID系统的基础上，提出了一种新的RAID体系结构——TRIP。TRIP通过集成和利用存储系统中通常存在的时间冗余(即快照和日志)来保护数据免受软错误的影响，同时提高写性能，从而减轻了小写问题。在写密集型期间，TRIP可以将每个小写请求的代价减少到一个设备IO操作，而维护临时冗余信息的代价最小。从平均数据丢失时间(Mean Time to Data Loss, MTTDL)角度进行的可靠性分析表明，TRIP的可靠性仅受到轻微影响。另一方面，我们的原型实现和性能评估表明，TRIP在数据传输速率和用户响应时间方面明显优于传统的基于奇偶校验的RAID系统，特别是在写密集型环境中。
{"title":"TRIP: Temporal Redundancy Integrated Performance Booster for Parity-Based RAID Storage Systems","authors":"Chao Jin, D. Feng, Hong Jiang, Lei Tian, Jingning Liu, Xiongzi Ge","doi":"10.1109/ICPADS.2010.49","DOIUrl":"https://doi.org/10.1109/ICPADS.2010.49","url":null,"abstract":"Parity redundancy is widely employed in RAID-structured storage systems to protect against disk failures. However, the small-write problem has been a persistent root cause of the performance bottleneck of such parity-based RAID systems, due to the additional parity update overhead upon each write operation. In this paper, we propose a novel RAID architecture, TRIP, based on the conventional parity-based RAID systems. TRIP alleviates the small-write problem by integrating and exploiting the temporal redundancy (i.e., snapshots and logs) that commonly exists in storage systems to protect data from soft errors while boosting write performance. During the write-intensive periods, TRIP can reduce the penalty of each small-write request to as few as one device IO operation, at a minimal cost of maintaining the temporal redundant information. Reliability analysis, in terms of Mean Time to Data Loss (MTTDL), shows that the reliability of TRIP is only marginally affected. On the other hand, our prototype implementation and performance evaluation demonstrate that TRIP significantly outperforms the conventional parity-based RAID systems in data transfer rate and user response time, especially in write-intensive environments.","PeriodicalId":365914,"journal":{"name":"2010 IEEE 16th International Conference on Parallel and Distributed Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130600803","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}
Reputation systems provide a promising way to build trust relationships between users in distributed cooperation systems, such as file sharing, streaming, distributed computing and social network, through which a user can distinguish good services or users from malicious ones and cooperate with them. However, most reputation models mainly focus on evaluating the quality of services in one dimension, but care less about the preferences of different users. This paper proposes a personalized reputation model which provides each user a personalized trust view on others according to his preferences. In our approach, we aggregate the users’ preferences with collaborative filtering method and qualify it with user similarity which is integrated into the computing of reputation value. The experimental results suggest that our model can resist possible kinds of malicious behaviors efficiently.
{"title":"Personalized Reputation Model in Cooperative Distributed Systems","authors":"W. Liu, Yang-Bin Tang, Huaimin Wang","doi":"10.1109/ICPADS.2010.122","DOIUrl":"https://doi.org/10.1109/ICPADS.2010.122","url":null,"abstract":"Reputation systems provide a promising way to build trust relationships between users in distributed cooperation systems, such as file sharing, streaming, distributed computing and social network, through which a user can distinguish good services or users from malicious ones and cooperate with them. However, most reputation models mainly focus on evaluating the quality of services in one dimension, but care less about the preferences of different users. This paper proposes a personalized reputation model which provides each user a personalized trust view on others according to his preferences. In our approach, we aggregate the users’ preferences with collaborative filtering method and qualify it with user similarity which is integrated into the computing of reputation value. The experimental results suggest that our model can resist possible kinds of malicious behaviors efficiently.","PeriodicalId":365914,"journal":{"name":"2010 IEEE 16th International Conference on Parallel and Distributed Systems","volume":"250 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133203630","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}
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