Flooding for reliable multicast in multi-hop ad hoc networks
Christopher Ho, Katia Obraczka, Gene Tsudik, Kumar Viswanath · 1999
Ad HOC Networks are gaining popu1arit.yas a result of advances in smaller, more versatile and powerful mobile comput,ing devices.The dist,inguishing feat,ure of these networks is the universal mobility of all host.s.This requires re-engineering of basic nebwork services including reliable multicast, communication.This paper considers t,he special case of highly mobile fast,-moving ad hoc net.works and argues that, for such networks, t,raditional multicast approaches are not appropriat,e.Flooding is suggested as a possible alt,ernative for reliable multicast and simulation results are used t,o illust.rateit.seffects.The experimental results also demonstrate a rather interest,ing outcome that even flooding is insufficient.for reliable multicast in ad hoc networks when mobility is very high.Some alternative, more persistent variations of flooding are sketched out.1 Introduction Recent advances in portable computing devices and wireless communication technology have made it possible to stay connected anywhere; anytime.In the near future, users will be able to move freely and still have seamless, reliable and high-speed network connectivity.Portable computers and hand-held devices will do for dat,a communication what cellular phones are now doing for voice communication.Traditional net,work mobi1it.yfocused on roaming, which is characterized by hosts connecting to the fixedinfrastructure internet.at locations other than their well-known home net.work address.Hosts can connect direct,ly to the fixed infrastructure on a visited subnet