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IPv6 for 802.11ah

IPv6 for 802.11ah. Date: July 19 , 20 11. Author: . Abstract. This presentation provides Necessity of IPv6 in IEEE 802.11ah Considerations for applying IPv6 to IEEE 802.11ah. Characteristics of IEEE 802.11ah. Use cases Sensors and meters Backhaul Sensor/Meter data Extended range Wi-Fi

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IPv6 for 802.11ah

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  1. IPv6 for 802.11ah Date:July19, 2011 Author:

  2. Abstract • This presentation provides • Necessity of IPv6 in IEEE 802.11ah • Considerations for applying IPv6 to IEEE 802.11ah

  3. Characteristics of IEEE 802.11ah • Use cases • Sensors and meters • Backhaul Sensor/Meter data • Extended range Wi-Fi • 802.11ah should support for • A lot of STAs (< 6000) • Low computing ability • Low power consumption • Short and Bursty traffics

  4. Advantages of IPv6 in IEEE 802.11ah • IPv6 enables to assign IP addresses to all STAs • IPv4: 32-bit short addresses • IPv6: 128-bit long addresses • Enough address space is suit to Sensors and Meters. • IPv6 provides multicast addresses • The ratio of multicasting messages will be increased in M2M. • IPv4: IP addresses for multicasting is insufficient. (224.0.0.0 – 239.255.255.255) • IPv6: Efficient transmission of multicasting messages using multicast addresses

  5. Advantages of IPv6 in IEEE 802.11ah • Stateless address autoconfiguration • IPv6 provides both of stateful and stateless autoconfiguration. • In stateless address autoconfiguration: • Each STAs generates its IP address, and makes sure that it is not a duplicate of others. • IP address management for a lot of STAs is efficient. • It is easy to change an IP address for a mobile STA.

  6. Related works with IPv6 • SEP 2.0 • Smart Energy Profile • Standard for interoperable products that monitor, control, inform and automate the delivery and use of energy and water. • ZigBee + Wifi + Home plug + Power Line tech. • It offers IPv6-based control for advanced metering infrastructure and home area networks. • Wi-Fi Alliance Smart Grid Task Group • Marketing Requirements Document for Interoperability Testing of Smart Energy Profile 2.0 specifiesthat Wi-Fi Smart Energy 2.0 devices shall support an IPv6 network solution to the Smart Meter.

  7. Issues in 802.11ah with IPv6 • Overhead incurred by IP autoconfiguration • In IEEE 802.11ah, • A lot of STAs are connected to an AP. • Traffics are short and bursty. • A high proportion of overhead occurs a lot of collisions and waiting time, and it increases the energy consumption of devices. • Duplicate address detection (DAD): • In stateless autoconfiguration, each STAs generates its IP address and makes sure that it is not a duplicate of others. • After a Neighbor Solicitation with the target address is multicasted to the subnet, a STA using the target address sends a Neighbor Advertisement message. • DAD procedure requires a lot of times to confirm a STA using the target address does not exist.

  8. Issues in 802.11ah with IPv6 • Broadcasting in Duplicate Address Detection (DAD) • To check whether the target address is already present on the link, a Neighbor Solicitation message is multicasted to the link. • In IEEE 802.11ah, • STAs repeat sleep and wake. • Since the traffics have short length and occur rarely, it is expected STAs have long sleep period. • Broad/multi-casting is inefficient. • Broad/multi-casting can cause problems when the DAD procedure is operated.

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