1. doc.: IEEE 802.11-05/1057r0 Submission November 2005 Bin Wang, ZTE CorporationSlide 1 Using AP’s Location Information in Load Balancing 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:2005-11-01 Authors:

2. doc.: IEEE 802.11-05/1057r0 Submission November 2005 Bin Wang, ZTE CorporationSlide 2 Abstract This document suggests the usage of AP’s location or neighbor information in AP based or AP participated load balancing for Wireless Network Managements.

3. doc.: IEEE 802.11-05/1057r0 Submission November 2005 Bin Wang, ZTE CorporationSlide 3 Agenda Introduction 802.11 current The support of 802.11k Proposed text

4. doc.: IEEE 802.11-05/1057r0 Submission November 2005 Bin Wang, ZTE CorporationSlide 4 Introduction Load balancing has been listed in the file “11-05-0827- 00-000v-tgv-objectives.doc” as an item of Service and Function Objectives: –Req 2030: AP Load Balancing –This protocol shall facilitate AP load balancing to improve wireless network throughput and QoS effectiveness.

5. doc.: IEEE 802.11-05/1057r0 Submission November 2005 Bin Wang, ZTE CorporationSlide 5 The condition of load balancing Load balancing in one BSS is actually a kind of load restriction : –The only operation to performance is reject newer STA entrance when load overflow. Load balancing in ESS is more adequate: –Besides network enter check, the network can make such decision that force or suggest a STA belongs to heavy BSS to hand over to a lighter BSS to even the load. –An AP has more confederates to accomplish one task. –Solve the same problem with more sufficient resources. –Efficiency and control.

6. doc.: IEEE 802.11-05/1057r0 Submission November 2005 Bin Wang, ZTE CorporationSlide 6 802.11 Current STA based hand over. –Advantages: STA knows exactly the occasion of hand over. STA knows exactly the strength of signals in around. –Disadvantages: No communication and correspond among BSSs. The information STA can acquire is insufficient to make correct decision. Huge differences between STAs from different venders. Uncontrolled handover. Arbitrary, none guaranteed consequence, resource exhausting.

7. doc.: IEEE 802.11-05/1057r0 Submission November 2005 Bin Wang, ZTE CorporationSlide 7 AP based or AP participated load balancing is reasonable AP based or AP participated load balancing can reduce the arbitrariness of STA hand over cause by load balancing. –APs exchange load information in ESS; –APs implement the judge algorithm; –The loads of network is undertook by AP, not by STA. Sometimes, take load information as the exclusive factor in AP’s judge algorithm is not enough, maybe cause results just the opposite to what we wish. Maybe AP’s location or neighbor information can do a favor.

8. doc.: IEEE 802.11-05/1057r0 Submission November 2005 Bin Wang, ZTE CorporationSlide 8 The support of 802.11k The 802.11k has definitely provided the neighbor graph and location information in radio measurement service. –In 5.4.5: The following are the wireless LAN radio measurement support offered by the radio measurement service: –…… –Providing information about neighbor APs. –In 11.8.3: Receiving a Neighbor Report An AP receiving a Neighbor Report Request shall respond with a Neighbor Report Response frame containing zero or more Neighbor Report elements.

9. doc.: IEEE 802.11-05/1057r0 Submission November 2005 Bin Wang, ZTE CorporationSlide 9 Proposed text Taking the location or neighbor information into account when TGv dealing with load balancing.

10. doc.: IEEE 802.11-05/1057r0 Submission November 2005 Bin Wang, ZTE CorporationSlide 10 Feedback?