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Problem Statement 6LoWPAN ? new requirements! Existing routing solutions do not operate in 6LoWPAN's adaptation layer (and do not support the addressing scheme defined by IEEE 802.15.4) Precise 6LoWPAN routing requirements must be defined. +-------------------------------+ | Application Layer | +-------------------------------+ | Transport Layer (TCP/UDP) | +-------------------------------+ | Network Layer (IPv6) | +-------------------------------+ | 6LoWPAN +---------+ | | Adaptation | Routing | | | Layer +---------+ | +-------------------------------+ | IEEE 802.15.4 (MAC) | +-------------------------------+ | IEEE 802.15.4 (PHY) | +-------------------------------+ |<---------------------- PHY Protocol Data Unit -------------------->| |<----------- MAC Protocol Data Unit -------------------->| |<-- Adaptation Layer --->| +----------+--------+----------+--------------+----+-----+-----+-----+ | PHY | MAC | 6LoWPAN | 6LoWPAN | | | | MAC | | Preamble | Header | Dispatch | Mechanism | IP | UDP | App | FCS | | & Header | | | (w/HC, etc.) | | | | | +----------+--------+----------+--------------+----+-----+-----+-----+ |<---6---->|<-------------------- 125 octets ----------------->|<-2->| |