IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN: 21-07-0315-Dynamic Information Element Support Title: Dynamic Information Element Support Date Submitted: September 2007 Presented at IEEE 802.21 session #22 in Hawaii Authors or Source(s): Ronny kim, Jin Lee Abstract: This document is to discuss adding dynamic information elements to MIIS in order to facilitate appropriate network selection 21-07-xxxx-00-0000

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 IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s 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 stated in Section 6 of the IEEE-SA Standards Board bylaws <http://standards.ieee.org/guides/bylaws/sect6-7.html#6> and in Understanding Patent Issues During IEEE Standards Development http://standards.ieee.org/board/pat/faq.pdf>  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 IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s 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 <http://standards.ieee.org/guides/opman/sect6.html#6.3> and in Understanding Patent Issues During IEEE Standards Development http://standards.ieee.org/board/pat/guide.html>  21-07-xxxx-00-0000

Media Independent Information Service The current status 802.21 provides only static link layer information parameters Network type Operator Identifier Cost Roaming_partners, etc. Dynamic link layer parameters have to be obtained with direct interaction with the access networks QoS List (Throughput, packet error rate..) Signal strength of links, etc. Direct interaction may occur more delay than using MIIS Supporting dynamic information to MIIS Pros More helpful to select appropriate access networks i.e. signal strength, radio resource Cons How to manage and update dynamic IEs Increasing implementation complexities 21-07-xxxx-00-0000

How to update and manage dynamic IEs? An example Distributed IS server environment Fast update and retrieval Proactive mode Periodic update by IS server Reactive mode Indication to notify IS server of changes of values MIIS server MIIS server Static IEs Dynamic IEs 2) New message for update request 2) MIH_Get_Link_ Parameters.confirm 3) New message for update confirm 1) MIH_Get_Link_ Parameters.request MIIS server 1)MIH_Link_parameters_report.indicaiton 21-07-xxxx-00-0000

Conclusion and Next step Adding dynamic Information Elements to MIIS is really useful to make suitable handover decision 802.21 can provide a way to achieve dynamic information as MIIS for network selection if it is technically feasible then we need to progress more on this 21-07-xxxx-00-0000