1. doc.: IEEE 802.11-11/1002r0 July 2011 Hyangsun You, LG Electronics Inc. Submission IPv6 for 802.11ah Author: Date: July 19, 2011 NameCompanyAddressPhoneemail Hyangsun YouLG Electronics LG R&D Complex 533, Hogye- 1dong, Dongan-gu, Anyang-shi, Kyungki-do, Korea +82-31-450- 7897 sssun.you@lge.com Yongho SeokLG Electronics LG R&D Complex 533, Hogye- 1dong, Dongan-gu, Anyang-shi, Kyungki-do, Korea +82-31-450- 1947 yongho.seok@lge.com Slide 1

2. doc.: IEEE 802.11-11/1002r0 July 2011 Hyangsun You, LG Electronics Inc. Submission Abstract This presentation provides –Necessity of IPv6 in IEEE 802.11ah –Considerations for applying IPv6 to IEEE 802.11ah Slide 2

3. doc.: IEEE 802.11-11/1002r0 July 2011 Hyangsun You, LG Electronics Inc. Submission 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 Slide 3

4. doc.: IEEE 802.11-11/1002r0 July 2011 Hyangsun You, LG Electronics Inc. Submission 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 Slide 4

5. doc.: IEEE 802.11-11/1002r0 July 2011 Hyangsun You, LG Electronics Inc. Submission 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. Slide 5

6. doc.: IEEE 802.11-11/1002r0 July 2011 Hyangsun You, LG Electronics Inc. Submission 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 specifies that Wi-Fi Smart Energy 2.0 devices shall support an IPv6 network solution to the Smart Meter. Slide 6

7. doc.: IEEE 802.11-11/1002r0 July 2011 Hyangsun You, LG Electronics Inc. Submission 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. Slide 7

8. doc.: IEEE 802.11-11/1002r0 July 2011 Hyangsun You, LG Electronics Inc. Submission 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. Slide 8