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Problems No method exists to make IP run over IEEE 802.15.4 networks Worst case .15.4 PDU 81 octets, IPv6 MTU requirements 1280 octets Stacking IP and above layers “as is” may not fit within one 802.15.4 frame IPv6 40 octets, TCP 20 octets, UDP 8 octets + other layers (security, routing, etc) leaving few bytes for data Not all adhoc routing protocols may be immediately suitable for LoWPAN DSR may not fit within a packet, AODV needs more memory, etc Current service discovery methods “bulky” for LoWPAN Primarily XML based that needs computing, more memory, etc Limited configuration and management necessary Security for multi hop needs to be considered |