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Ad Hoc Networking  

GSC9/GRSC_017. Ad Hoc Networking  . GSC-9, Seoul. 1. Initial Architectures. - Low power sensors networks “surveillance” web - small, relatively static, embedded ad hoc networks `“bluetooth-type” networks - Small-to-medium sized, mobile ad hoc networks “802.11-style”. Terminlology .

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Ad Hoc Networking  

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  1. GSC9/GRSC_017 Ad Hoc Networking   GSC-9, Seoul 1

  2. Initial Architectures - Low power sensors networks “surveillance” web - small, relatively static, embedded ad hoc networks `“bluetooth-type” networks - Small-to-medium sized, mobile ad hoc networks “802.11-style” GSC-9, Seoul

  3. Terminlology Mobile Ad Hoc Networking = = Mobile, Multi hop, Wireless Networking = Mobile Mesh Networking = Mobile Packet Networking GSC-9, Seoul

  4. Ad hoc network applicability Scale Small scale Large scale Network type (few nodes) (many nodes) Commercial home/office personal mobile cellular like industrial local networks Government specific Public Safety Large-scale military network Community/urban “covert” networks local communications networks GSC-9, Seoul

  5. Hybrid Communication Networks Satellite overlay High speed backbone network MANET No fixed infrastructure Fixed/static infrastructure GSC-9, Seoul

  6. IETF MANET standardization • MANET - established in 1997 chartered working group within Internet Engineering Task Force (IETF) • Focussed on studying routing specification with the goal of supporting network scaling up to hundreds of routers * Unicast routing protocol * Multicast routing protocol • Work on routing for large and small scale networks • Work relies on the existing IETF standards such as mobile-IP and IP addressing • For large-scale MANET the lack of interest have put this work in question • Flooding: work on requirements had started GSC-9, Seoul

  7. Mobile Ad Hoc Networking (MANET) • Dynamic topologies • Bandwidth-constrained • Asymmetric links with variable capacity • Energy constrained • Multiple technologies can be used simultaneously GSC-9, Seoul

  8. Open issues • A optimisation network layer and radio layers for different systems (incl. 802.11, HiperLAN) • B QoS support • C secuirity • D mobility • B, C, D issues could be orthogonal, joint optimization is very difficult (system design choice) • tradeoff between centralized and distributed algorithms for B,C,D GSC-9, Seoul

  9. Relevant ETSI activities • MESA Project - ad hoc network on future Public Safety communications • BRAN - HiperLAN-2, other • 3GPP - UTRA TDD Standardization challenges => There is need for standard-based approach at the network layer. GSC-9, Seoul

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