1. doc.: IEEE 802.11-07/xxxxr0 Submission March 2007 Srinivas Sreemanthula Slide 1 IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN:21-07-0087-00-SSID-info-MIH-IS.ppt Title: SSID Information in MIH IS Date Submitted: March, 2007 Presented at IEEE 802.21 session #NN in Orlando, FL Authors or Source(s): Srinivas Sreemanthula Abstract:

2. doc.: IEEE 802.11-07/xxxxr0 Submission March 2007 Srinivas Sreemanthula Slide 2 IEEE 802.21 presentation release statements This document has been prepared to assist the IEEE 802.21 Working Group. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEEs name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEEs sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.21. The contributor is familiar with IEEE patent policy, as outlined in Section 6.3 of the IEEE-SA Standards Board Operations Manual and in Understanding Patent Issues During IEEE Standards Development http://standards.ieee.org/board/pat/guide.html> Section 6.3 of the IEEE-SA Standards Board Operations Manualhttp://standards.ieee.org/guides/opman/sect6.html#6.3 http://standards.ieee.org/board/pat/guide.html

3. doc.: IEEE 802.11-07/xxxxr0 Submission March 2007 Srinivas Sreemanthula Slide 3 Abstract IEEE 802.21 provides Information Services (IS) for WLAN network selection TGu defines MAC amendments to obtain IS via GAS mechanisms and framework in state-1 Proposal to include SSID information in the IS data model –STA can obtain this info in state-1 and use for association

4. doc.: IEEE 802.11-07/xxxxr0 Submission March 2007 Srinivas Sreemanthula Slide 4 Problem AP can be configured with many SSID e.g. specific to service providers or specific to certain local use STA need to know the exact SSID to use for association Currently, 802.21 IS model –Supports access network ID which is the HESSID/WIID - can be used to identify the Wireless network but cannot be used for association –does not include SSID information required for association in the IS data Problem specific to WLAN, –Other links have one universal network id that can also be used in registration/association

5. doc.: IEEE 802.11-07/xxxxr0 Submission March 2007 Srinivas Sreemanthula Slide 5 Use Case MN AP IS/GAS Beacon((H)ESSID, IW cap, GAS) Gas-Intital-Req(802.21-IS-Req) 802.21 IS Req((H)ESSID) IS Req: 1. Is this ESSID good for roaming? 2. If so, what is the SSID to use here? 802.21 IS Resp(SSID) Gas-Callback-Resp(802.21-IS-Resp) Knows SSID to use Associate (SSID) MAC Call back mechanism not shown

6. doc.: IEEE 802.11-07/xxxxr0 Submission March 2007 Srinivas Sreemanthula Slide 6 Proposal Add an optional IE, TYPE_IE_WLAN_SSID, within access network specific information elements Note that this IE may not be relevant for other links (hence the use of WLAN term) Normative text in attached doc

7. doc.: IEEE 802.11-07/xxxxr0 Submission March 2007 Srinivas Sreemanthula Slide 7 Conclusions Bridges the gaps in assumptions between the two technical groups regarding network selection in WLAN SSID will be available to the user as part of GAS query supported for MIH IS in state-1