1. 21-06-0502-00-0000 IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN: 21-06-0502-00-0000 Title: Comments Date Submitted: Jan, 06, 2006 Presented at IEEE 802.21 session #12 in Hawaii Authors or Source(s): Jiang Bingqiang, Zhuang hongcheng Abstract: This document proposes an amendment for event register. MIH users can take more appropriate actions according to the failure reasons when event register fails.

2. 21-06-0502-00-0000 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 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. 21-06-0502-00-0000 1.21-05-0352-00-0000-Event_Register_ Amend.ppt During the register process, it is possible that some events couldn’t be registered correctly, but there are no primitives or methods to notify MIH user about the failure reasons in the current draft standard. For example, link event register maybe fail because of disappearance of the event source or other reasons. 2.21-05-0353-00-0000-Network_select.doc In the current draft standard, terminals and networks all can initiate a handover. In IEEE802.16, Terminal can decide to select own suitable network which may be different from one that the current network suggests. So should supply a way by which terminals and networks all can select a suitable network for the handover.

4. 21-06-0502-00-0000 3.21-05-xxxx-00-0000-Resource_Reserve.ppt In the current draft, upper layers may utilize services provided by the MIH Function across different entities to reserve resources required for a handover operation between heterogeneous networks, but none of the MIH services can offer indication to upper layer to immediately withdraw the reserved resources in target APs not selected by the terminal, thus it leads to wasting resources. 4.21-05-0352-00-0000-Event_Report.ppt Devices such as hot-plugged interfaces or an external module may cause the list of supported link layer events to change in any time. Sometimes, it is very important to send the changed message to high layer automatically in time for deciding to initiate handover in real-time scenario.