1. doc.:IEEE 802 11-10-1307-00-000v Submission Nov 2010 RuiJun Feng, China Mobile Proposal for Ping Pang Handoff Count with External Networks Date: 2010-11-05 Authors: 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.ok-brit.compatcom@ieee.org

2. doc.:IEEE 802 11-10-1307-00-000v Submission Nov 2010 RuiJun Feng, China Mobile Topics Background Problem Proposal

3. doc.:IEEE 802 11-10-1307-00-000v Submission Nov 2010 RuiJun Feng, China Mobile Background As WIFI is pretty popular, if a traditional operator wants to provide a continuous and satisfied service to its users holding wifi-inside phones, the support for the handoff between WIFI and mobile networks is becoming necessary more and more –Because of the complexity of the multi-access networks coverage, ping-pang handoff will be a normal thing such as in the buildings of a campus.

4. doc.:IEEE 802 11-10-1307-00-000v Submission Nov 2010 RuiJun Feng, China Mobile Problem The ping-pang handoff is bothersome, bring meaningless overload to the both-sides networks. The frequency of the ping-pang handoff is a very important factor to optimize the radio boundary and adjust the handoff policy. Traditionally, if a staff wants to optimize the both-side networks to decrease the possibility of the ping-pang handoff, he has to do DT with real muli-modes devices in the areas with higher user complaints. –To make sure of whether the ping-pang handoff is just the reason –It always takes a long time with much cost

5. doc.:IEEE 802 11-10-1307-00-000v Submission Nov 2010 RuiJun Feng, China Mobile Proposal A judgment can be made remotely, depending on the number of ping-pang handoffs: –Which can save much time to optimize the networks boundaries or expand the network. –Which can help adjust the handoff policy. The way of decreasing the ping-pang handoffs is different from that of decreasing or stabling other kind of handoffs

6. doc.:IEEE 802 11-10-1307-00-000v Submission Nov 2010 RuiJun Feng, China Mobile Proposal A new counter with two additional objects is proposed to add into MIB, called dot11PingPangHandoffCount dot11PingPangHandoffCount OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESPRITION " This counter, only available at a WNM AP, shall increment only when a terminal MAC Address joining or leaving again in a dot11HandOffTimer cycle, only if the MAC Address was in the dot11HandoffTable." ::= { xxxx ? }

7. doc.:IEEE 802 11-10-1307-00-000v Submission Nov 2010 RuiJun Feng, China Mobile Proposal The first Additional Object along with dot11PingPangHandoffCount is called dot11HandOffTimer –Default value is 300 seconds? dot11HandOffTimer OBJECT-TYPE SYNTAX Timer MAX-ACCESS read-write STATUS current DESPRITION " This timer, serving for dot11PingPangHandoffCount. As it is 0, dot11PingPangHandoffCount doesn’t work; otherwise, in each timer cycle, dot11PingPangHandoffCount adds one if a ping-pang handoff happens, which depends on the dot11HandoffTable." ::= { xxxx ? }

8. doc.:IEEE 802 11-10-1307-00-000v Submission Nov 2010 RuiJun Feng, China Mobile Proposal The second additional object along with dot11PingPangHandoffCount is called dot11HandoffTable dot11HandoffTable OBJECT-TYPE SYNTAX dot11HandoffEntry MAX-ACCESS not accessible STATUS current DESPRITION “ Each entry represents a row in the dot11HandoffTable and provides information about whether a mac address incomes and outcomes in continuous dot11HandOffTime cycles.“ Index {dot11HandoffMacAddress } ::= { xxxx ? }

9. doc.:IEEE 802 11-10-1307-00-000v Submission Nov 2010 RuiJun Feng, China Mobile Proposal dot11HandoffEntry ::= SQUENCE { dot11HandoffMacAddress MacAddress dot11IsPingPang Integer{0,1} } dot11HandoffMacAddress OBJECT-TYPE SYNTAX MacAddress MAX-ACCESS read-only STATUS current DESPRITION “ Once a incoming or outgoing handoff happens and the dot11HandOffTimer is not 0, the dot11PingPangHandoffCount adds one if the corresponded mac address already was in the table. Otherwise add a new entry into the table.“ ::= {dot11HandoffEntry 1 }

10. doc.:IEEE 802 11-10-1307-00-000v Submission Nov 2010 RuiJun Feng, China Mobile Proposal dot11IsPingPang OBJECT-TYPE SYNTAX Integer{0,1} MAX-ACCESS read-only STATUS current DESPRITION “ As a new mac address is added into the table, the default value is 0. And then if the handoff of the mac address happens again in the bi-direction and in a dot11HandOffTimer cycle, the value is 1 no matter how many times happens more. And in the next adot11HandOffTimer cylce, all the values of 1 will reset to 0 and the left entries will be deleted. “ ::= {dot11HandoffEntry 2 }

11. doc.:IEEE 802 11-10-1307-00-000v Submission Nov 2010 RuiJun Feng, China Mobile Motion Do you think it meaningful to put the dot11PingPangHandoffCount counter with two additional objects into the MIB to facilitate some service and network quality statistics? - Yes - No - Don ’ t know