Ad Hoc Networks : Technologies and Protocols - University of ...

Conclusions and Future Directions 119
for any solutions proposed for MANETs, overhead is of key concern due to the
stringent nodal budgets (e.g. limited battery, slow processors, etc.) in many
applications. Strong security mechanisms are needed, yet, the solutions need
to be light-weighted no matter in terms of message overhead or computational
cost. All these factors contribute to the difficulty in implementing security in
group communication models of MANETs.
4.7 Conclusions and Future Directions
Several potential applications of mobile ad hoc networks have the need for
point-to-multipoint communication. It is thus essential to provide multicasting
support in ad hoc networks. In this chapter, we have presented a classification
of multicasting protocols on the basis of their reliance on various types of nodes
or networking layers. Description of the protocols including their salient characteristics
and performance have been detailed in this chapter. Protocols for
broadcasting techniques have been also presented. Several interesting overarching
issues that are common to all protocol have been also analyzed.
With the advances in wireless technology and the applications of ad hoc
networks, efficient multicasting support will become very critical. Future effort
in this context should be targeted to energy efficient multicasting, QoS-aware
multicasting, and cross-layer support for multicasting.
Acknowledgment
This work was supported in part by the National Science Foundation under
the grants CCR-0296070 and ANI-0296034, and a generous gift from Hewlett
Packard Corporation.
References
[1]
[2]
[3]
[4]
[5]
S.E. Deering. Multicast routing in a datagram internetwork. Ph.D. thesis,
Stanford University, Dec. 1991.
P. Sinha, R. Sivakumar, and V. Bharghavan. MCEDAR: multicast core
extraction distributed ad hoc routing. IEEE Wireless Commun. and Net.
Conf. (WCNC), Sept. 1999, pp. 1313–17.
J. J. Garcia-Luna-Aceves, E. L. Mada-uga. The core assisted mesh protocol.
IEEE JSAC, Vol 17, No. 8, August 1999, pp.1380-1394.
S.-J. Lee, M. Gerla, and C.-C. Chiang. On-demand multicast routing protocol(ODMRP).
Proc. of IEEE WCNC’99, Sep. 1999.
S. Lee, and C. Kim. Neighbor support ad hoc multicast routing protocol.
In Proc. the First Annual Workshop on Mobile and Ad hoc Networking
and Computing, 2000, pp. 37-44.