Pornavalai, Chotipat
Loading...
Preferred name
Pornavalai, Chotipat
Alternative Name
Pomavalai, Chotipat
Main Affiliation
Email
chotipat.po@kmitl.ac.th
4 results
Now showing 1 - 4 of 4
- Some of the metrics are blocked by yourconsent settings
Item type:Publication, A light-weight fault-tolerant time synchronization for wireless sensor networks(2008-12-01); Varakulsiripunth, RuttikornWireless sensor networks (WSN) have received a lot of attention recently due to their enormous potential in different applications. Many applications in WSN require time synchronization among all the sensor nodes. However, in practice, network do normally have some abnormal nodes (we called Fault Clock Node or FCN), which could cause high synchronization error. In this paper, we present a light-weight fault-tolerant time synchronization protocol (LiFTiS) which works in a way similar to NTP. The protocol is aware of FCN and is able to detect its children in hierarchical tree. We also propose a light-weight algorithm for selecting the best parent. Our simulation results show that the average synchronization error using the proposed protocol is 5-31% less than the existing algorithms e.g. TPSN etc. © 2008 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A policy based negotiation protocol for services agreement in mobile(2005-12-01); Varakulsiripunth, RuttikornIn this paper, we have proposed an approach of negotiation protocol for services agreement between two wireless nodes in ad hoc networks. Protocol principles are based on peculiarities of mobile nodes and mobile users on MANET, i.e., user autonomy, node functionality and resource management. Mobile users can use this negotiation protocol for defining its network functions in MANET based on their policy. Service level agreements between two wireless nodes can be renegotiated depending on current user's application requirements and available resources. Protocol is designed to be able to negotiate on many parameters such as route, link bandwidth or QoS. We also present a scenario in MANET to show the effectiveness of our proposed protocol. © 2005 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, An efficient dynamic multicast routing algorithm with advance resource reservation awareness(2004-06-28); ; Varakulsiripunth, RuttikornReserving the resources for the requested applications is one of the most effective schemes that were proposed to offer the time-critical multimedia applications recently. Because the resource is limited, an ability to provide resource reservation in advance is essential in multi-party applications with dynamic accessing and leaving of user such as modern integrated (voice, video and data) collaboration system. Modified Greedy (MG) algorithm was proposed for multicast routing in advance reservation environment (time of joining in and leaving from multicast group need to be informed to source node). However, MG algorithm has an assumption that member of multicast group join in and leave from multicast session punctually. In this work, we propose the late version of MG algorithm that yields a good performance in the situation that the inaccuracy of information given by user might be happened, as shown in our simulation results. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Designing of policy-based negotiation protocol on MANET(2006-12-01);