July 2011 doc IEEE 802 11 111002 r

July 2011 doc. : IEEE 802. 11 -11/1002 r 0 IPv 6 for 802. 11 ah Date: July 19, 2011 Author: Name Company Hyangsun You LG Electronics Yongho Seok LG Electronics Submission Address LG R&D Complex 533, Hogye 1 dong, Dongan-gu, Anyang-shi, Kyungki-do, Korea Slide 1 Phone email +82 -31 -4507897 sssun. you@lge. com +82 -31 -4501947 yongho. seok@lge. com Hyangsun You, LG Electronics Inc.

July 2011 doc. : IEEE 802. 11 -11/1002 r 0 Abstract • This presentation provides – Necessity of IPv 6 in IEEE 802. 11 ah – Considerations for applying IPv 6 to IEEE 802. 11 ah Submission Slide 2 Hyangsun You, LG Electronics Inc.

July 2011 doc. : IEEE 802. 11 -11/1002 r 0 Characteristics of IEEE 802. 11 ah • Use cases – Sensors and meters – Backhaul Sensor/Meter data – Extended range Wi-Fi • 802. 11 ah should support for – – Submission A lot of STAs (< 6000) Low computing ability Low power consumption Short and Bursty traffics Slide 3 Hyangsun You, LG Electronics Inc.

July 2011 doc. : IEEE 802. 11 -11/1002 r 0 Advantages of IPv 6 in IEEE 802. 11 ah • IPv 6 enables to assign IP addresses to all STAs – IPv 4: 32 -bit short addresses – IPv 6: 128 -bit long addresses – Enough address space is suit to Sensors and Meters. • IPv 6 provides multicast addresses – The ratio of multicasting messages will be increased in M 2 M. – IPv 4: IP addresses for multicasting is insufficient. (224. 0. 0. 0 – 239. 255) – IPv 6: Efficient transmission of multicasting messages using multicast addresses Submission Slide 4 Hyangsun You, LG Electronics Inc.

July 2011 doc. : IEEE 802. 11 -11/1002 r 0 Advantages of IPv 6 in IEEE 802. 11 ah • Stateless address autoconfiguration – IPv 6 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. Submission Slide 5 Hyangsun You, LG Electronics Inc.

July 2011 doc. : IEEE 802. 11 -11/1002 r 0 Related works with IPv 6 • SEP 2. 0 – Smart Energy Profile • Standard for interoperable products that monitor, control, inform and automate the delivery and use of energy and water. – Zig. Bee + Wifi + Home plug + Power Line tech. – It offers IPv 6 -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 specifies that Wi-Fi Smart Energy 2. 0 devices shall support an IPv 6 network solution to the Smart Meter. Submission Slide 6 Hyangsun You, LG Electronics Inc.

July 2011 doc. : IEEE 802. 11 -11/1002 r 0 Issues in 802. 11 ah with IPv 6 • Overhead incurred by IP autoconfiguration – In IEEE 802. 11 ah, • 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. Submission Slide 7 Hyangsun You, LG Electronics Inc.

July 2011 doc. : IEEE 802. 11 -11/1002 r 0 Issues in 802. 11 ah with IPv 6 • 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. 11 ah, • 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. Submission Slide 8 Hyangsun You, LG Electronics Inc.