A Fast Handoff Scheme for Streaming Service in Wireless Sensor Networks

Abstract

The IEEE 802.15.4 standard is a rapidly growing technology for short-range communications and low rate Wireless personal area networking. The standard has been widely accepted as the de facto standard for wireless sensor network (WSN) because of its low cost deployment and remarkable applications. The mobility management in the existing WSN has highly suffered from different issues like high packet loss and delay because the current mobility management in IEEE 802.15.4 lacks the support of handover management for real-time streaming applications. In this paper, we propose a new fast handoff mechanism which eradicates the scanning delay. The proposed scheme uses the information of link quality (LQ) of the neighboring coordinators (COs), and on the basis of this information it selects an appropriate CO for handoff. The proposed scheme is evaluated through extensive simulations which show its strength and accuracy in the context of switching of high streaming data from one CO to another.

A New Association Scheme for Handling Node Mobility in Cluster-Tree Wireless Sensor Networks

“…Yun et al [ 15 ] reported that one of the main problems of association mechanisms is the delay caused by the full channel scanning process, that can reach 90% of the total handover interval and contributes to high packet loses and to the random loss of connection. Basically, they propose a new mechanism that eliminates the channel scanning delay, where the MN creates, and continually updates, a table to store the MAC address, the available channel number and the LQI of the neighbor coordinators.…”

“…Regarding the strategy adopted for handover, most of the above studies anticipate the selection of a more appropriate coordinator when degradation of the connection between the MN and the coordinator is detected [ 8 , 11 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ]. Another relevant characteristic is that one of the main modifications to the association mechanism is to reduce the number of scanned channels in the case of loss of connectivity [ 9 , 11 , 15 , 16 , 17 ], while some other schemes try to reduce the association time.…”

Analytical solution for priority based Handover voice and data packets in mobile multimedia WSN

“…There have been a lot of work done in diverse directions to improve QoS of WSN networks, by improving routing protocols, by removing un necessary time for hand over packets/calls, by introducing low power sensor"s, other techniques are but not limited to are RI-MAC(Receiverinitiated MAC): the protocol is used for broadcasting and during data transmission it degrade the link quality by searching a new relay node without interrupting previous nodes communication, by Beacon Enabled IEEE 802.11.4 mac: the protocol uses two methods to transmit data which are beacon enabled and non beacon enabled mode, Handover based on 6LoWPAN AND Soft handover based on 6LoWPAN, by GT-MOTS(game theory inspired mobile object trapping system) the protocol exploit the WSN in the form objects it is a part of a game theory [3]. In [1] the author has presented statistical routing protocol which is a solution to overcome the shot comings in traditional hand over process, also the author has suggested ways on how the statistical routing be considered as an alternative to traditional routing protocol in WSN where capabilities of the nodes are limited, in [2] challenges in mobility management are identified and the author has presented with possible solution for handle mobility management such as LoWPAN6 (Low Power Sensor).…”

“…In [1] the author has presented statistical routing protocol which is a solution to overcome the shot comings in traditional hand over process, also the author has suggested ways on how the statistical routing be considered as an alternative to traditional routing protocol in WSN where capabilities of the nodes are limited, in [2] challenges in mobility management are identified and the author has presented with possible solution for handle mobility management such as LoWPAN6 (Low Power Sensor). In [3] a single buffer solution to handle hand over voice and hand over data call is presented, calls do enter the system when channels are available to process calls but in case all channels remainbusy processing calls HO voice calls start entering buffer and hand over data calls are blocked, when the buffer is full the hand over voice calls are blocked as well, in case channel is available the hand over calls succeed. In [7] a protocol RI-MAC is proposed for theprovisioning of seamless handover.…”

“…Wireless senor networks have been developed rapidly in recent years due to its capabilities of independent computing, data communication and sensing, and long battery life and low cost deployment [3]. The sensor networks do not require expansive equipment to manufacture them.…”