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Unformatted text preview: om sources to the the sink when streams are level-2 U-message contains the following fields: TID FI CNH NINS NINS: New INS 7. Task Termination A task at the sources are terminated in two ways: Sources have finished the task associated with the instruction given by sink U-message with the task completed instruction indicator is broadcast by sources U-message with the task termination instruction indicator is set by the sink Sink decides to terminate the instruction The streams are torn down by removing C-tree braches at the intermediate nodes and Ttree at the sources SER
Advantages: QoS requirements of the instruction is considered Average energy of the routes are taken into consideration in routing Robustness is achieved through selection of level-1 and level-2 streams After the route is established, sink can give new instructions to the sources without setting up another route Four types of communication is supported: one-to-one, one-to-many, many-to-one, and many-to-many Disadvantages: Storage and computation cost at the nodes Loops can form in level-2 streams How to set the value of References
[Braginsky+ 2002] D. Braginsky and D. Estrin, Rumor Routing Algorithm for Sensor Networks, First Workshop on Sensor Networks and Applications (WSNA), September 28, 2002, Atlanta, Georgia, pp. 22-31. [Karlof+ 2002] C. Karlof, Y. Li and J. Polastre, ARRIVE: Algorithm for Robust Routing in Volatile Environments, UC Berkley, Tech Report, May 2002. [Intanagonwiwat + 2000] C. Intanagonwiwat, R. Govindan and D. Estrin, Directed Diffusion: A Scalable and Robust Communication Paradigm for Sensor Networks, In Proceedings of the Sixth Annual International Conference on Mobile Computing and Networks (MobiCOM 2000), August 2000, Boston, Massachusetts [Weilian+ 2002] W. Su and I. Akyildiz, A Stream Enabled Routing (SER) Protocol for Sensor Networks, Med-hoc-Net 2002, Sardegna, Italy, September 2002....
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- Spring '08