1. doc.: IEEE 802.11-06/0126r0 Submission January 2006 Yeong M. Jang, Kookmin University, KoreaSlide 1 Parameters for Network Selection Algorithm under Heterogeneous Network Environments Notice: This document has been prepared to assist IEEE 802.11. 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. Release: 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 802.11. Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures, including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the Working Group of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE 802.11 Working Group. If you have questions, contact the IEEE Patent Committee Administrator at.http:// ieee802.org/guides/bylaws/sb-bylaws.pdfstuart.kerry@philips.compatcom@ieee.org Date: 2006-01-19 Authors:

2. doc.: IEEE 802.11-06/0126r0 Submission January 2006 Yeong M. Jang, Kookmin University, KoreaSlide 2 Contents Interworking Architecture in Heterogeneous Networks Handoff Procedure in Networks Network Selection Algorithm Summary

3. doc.: IEEE 802.11-06/0126r0 Submission January 2006 Yeong M. Jang, Kookmin University, KoreaSlide 3 Interworking Architecture in Heterogeneous Networks

4. doc.: IEEE 802.11-06/0126r0 Submission January 2006 Yeong M. Jang, Kookmin University, KoreaSlide 4 Interworking Architecture in Heterogeneous Networks Characteristics: Characteristics 3G Cellular Network (1X EV-DO) WLAN (802.11a/b/g) WMAN (802.16/e) Data Rate 2.4Mbps/ 153.6Kbps ~54Mbps24Mbps/6Mbps RangeSeveral km50~100mSeveral km Mobility Over several tens km/h Below 30~40km/hAbout 60 km/h

5. doc.: IEEE 802.11-06/0126r0 Submission January 2006 Yeong M. Jang, Kookmin University, KoreaSlide 5 Handoff Procedure in Networks

6. doc.: IEEE 802.11-06/0126r0 Submission January 2006 Yeong M. Jang, Kookmin University, KoreaSlide 6 Network Selection Algorithm

7. doc.: IEEE 802.11-06/0126r0 Submission January 2006 Yeong M. Jang, Kookmin University, KoreaSlide 7 Network Selection Algorithm Use average RSS with window size –Window size depends on speed of mobile station Choose available network –Chose network which exceed current RSS by Hys RSS Execute network selection algorithm –Considering service class, QoS parameters, speed of mobile station, and etc.

8. doc.: IEEE 802.11-06/0126r0 Submission January 2006 Yeong M. Jang, Kookmin University, KoreaSlide 8 Hysteresis value depends on speed of mobile station –Enable to prevent entry to the sensitive network –Prevent ping-pong situation Network Selection Algorithm

9. doc.: IEEE 802.11-06/0126r0 Submission January 2006 Yeong M. Jang, Kookmin University, KoreaSlide 9 Window size depends on speed of mobile station –Prevent Mobile station to skip available network –Prompt entry to the suitable network Speed of mobile station [km/h] 0 ~ 3030 ~ 8080 ~ Traditional network selection algorithm Constant Proposed network selection algorithm HighMiddleLow Network Selection Algorithm

10. doc.: IEEE 802.11-06/0126r0 Submission January 2006 Yeong M. Jang, Kookmin University, KoreaSlide 10 ClassThroughputDelayBERSecurityCostRSS Conversational 5 614 3 2 Streaming 6543 21 Interactive 2354 61 Background4163 52 Service class and QoS Parameters –RSS, Throughput, Delay, BER, Security, Cost, etc. Weighting according to service class Network Selection Algorithm

11. doc.: IEEE 802.11-06/0126r0 Submission January 2006 Yeong M. Jang, Kookmin University, KoreaSlide 11 Traditional Network Selection Algorithm –RSS priority –Static window size –Static hysteresis value Proposed Network Selection Algorithm –Considering QoS parameters –Weighting QoS parameters respectively according to service class –Dynamic window size depending on speed of mobile station –Dynamic hysteresis value Network Selection Algorithm

12. doc.: IEEE 802.11-06/0126r0 Submission January 2006 Yeong M. Jang, Kookmin University, KoreaSlide 12 Selecting the most suitable network –QoS parameter weight of Service class QoS parameter value of available networks –Selected network is the network having the best value × Network Selection Algorithm

13. doc.: IEEE 802.11-06/0126r0 Submission January 2006 Yeong M. Jang, Kookmin University, KoreaSlide 13 Summary There are many QoS parameters for network selection –RSS, Throughput, Delay, BER, Security, Cost, etc. Discriminative weighting according to service class –Enable to customize user preference Window size depend on speed of mobile station Hysteresis value depends on speed of mobile station Method to satisfy user’s QoS Mobile station should support multi-Protocol