IEEE 802 21 MEDIA INDEPENDENT HANDOVER DCN 21

IEEE 802. 21 MEDIA INDEPENDENT HANDOVER DCN: 21 -06 -0630 -00 -0000 Title: The amendment for the MIH_Scan primitive Date Submitted: April, 2006 Presented at IEEE 802. 21 session #14 in Jacksonville Authors or Source(s): Liu Yuan, Dong Pei Ying Abstract: This contribution suggests some amendments to the primitive MIH_Scan. It extends the parameter Scan Request Sets for more request information. It also amends the parameter Scan Response Sets to provide more information for making handover decisions. 21 -06 -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 outlined in Section 6. 3 of the IEEE-SA Standards Board Operations Manual <http: //standards. ieee. org/guides/opman/sect 6. html#6. 3> and in Understanding Patent Issues During IEEE Standards Development http: //standards. ieee. org/board/pat/guide. html> 21 -06 -xxxx-00 -0000

Background • In the current draft, MIH_Scan is issued by upper layers to discover neighboring POAs. A MIH_Scan command may get information for more than one link type, and the parameter Scan Request Sets is defined as the link types that upper layers want to discover. Name Scan. Link. Type Network Identifier • It will be useful to extend the parameter Scan Request Sets for more information. The Scan Request can include two parts, the Scan Link Type and the Request Parameters. The Request Parameters may be given as a list of scan commands for helping the upper layers to find the specific Po. As. 21 -06 -xxxx-00 -0000

Background • In 802. 21, heterogenous network handovers can be initiated by terminal or network, and the initiator of handover should know the parameters of radio environment around the terminal, such as the addresses and signal strength of the Po. As that terminal can detect. Without these information, the initiator can’t select the proper candidates for handover. • For an example, in GSM system, handover between different cells is initiated and controlled by BSC and terminal provides information for assistance. The terminal measures the parameters of radio environment of its neighboring cells and reports the results to the serving BSC periodically. The BSC makes the handover decision according to these reports and initiates the handover to the terminal and MSC. 21 -06 -xxxx-00 -0000

Background • UMA system is also an example. During the handover from UMAN (Unlicensed Mobile Access Network), MN will send a URR HANDOVER REQUIRED message to the network including the list of target cell identifiers and the received signal strength of each cell. • Currently there is no right way for initiators of handover to get dynamic radio information of terminal. The Link_Parameters_Change, MIH_Get_Status or MIH_Link_Parameters_Report can only report the parameters of the current link or links that have been established. The MIH_Scan response is only used to get the potential Po. As’ address information and can not provide dynamic radio environment parameters such as signal strength. So it is necessary to extend MIH_Scan response to provide more information for making handover decision. 21 -06 -xxxx-00 -0000

Amendment to the current draft MIH_Scan. request (Source Identifier, Destination Identifier, Scan Request Sets ) Name Source Identifier Destination Identifier Type … … Scan Request Sets Valid Range … … N/A Description … … List of scan requests The scan request can be composed of the two parts as follows: Name Scan Link Type Integer Valid Range 0 x 01 – 802. 3 0 x 02 – 802. 11 0 x 03 – 802. 16 Description The network type that upper layers want MIH Function to scan. 0 x 04 – 3 GPP Request Parameters 21 -06 -xxxx-00 -0000 STRING 0 x 05 – 3 GPP 2 N/A Scan request parameters for each access network

Amendment to the current draft MIH_Scan. response (Source. Identifier, Destination. Identifier, Scan Response Sets) Name Source Identifier Type Identifier Valid Range Any valid individual or group identifier Destination Identifier MIH_LOCAL MIH_REMOTE Scan Response Sets 21 -06 -xxxx-00 -0000 N/A Description The identifier of entity where the request is initiated. This field may be optionally left empty if the command is local The destination identifier of request or response. This is the identifier of local or peer MIH Function List of detected Po. As and related information.

Amendment to the current draft The information of detected Po. As may include the static and dynamic parts as follows: Name NETWORK_TYPE Type Integer Valid Range 0 x 01 – 802. 3 Description The network type of Po. A 0 x 02 – 802. 11 0 x 03 – 802. 16 0 x 04 – 3 GPP NETWORK_ID ADDRESS SIGNAL_STRENGTH Media Dependent Information 21 -06 -xxxx-00 -0000 STRING Integer 0 x 05 – 3 GPP 2 N/A N/A The identifier of network The address of Po. A. The signal strength of Po. A The extended information that is media dependent and defined in related SDOs