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March 2000 doc.: IEEE 802.11-00/38 SubmissionSlide 1 Rajugopal Gubbi (Sharewave) Tutorial on Achieving End-to-end QoS Rajugopal Gubbi Sharewave, Inc.

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Presentation on theme: "March 2000 doc.: IEEE 802.11-00/38 SubmissionSlide 1 Rajugopal Gubbi (Sharewave) Tutorial on Achieving End-to-end QoS Rajugopal Gubbi Sharewave, Inc."— Presentation transcript:

1 March 2000 doc.: IEEE 802.11-00/38 SubmissionSlide 1 Rajugopal Gubbi (Sharewave) Tutorial on Achieving End-to-end QoS Rajugopal Gubbi Sharewave, Inc.

2 March 2000 doc.: IEEE 802.11-00/38 SubmissionSlide 2 Rajugopal Gubbi (Sharewave) End-to-end QoS What is it Ability to preserve QoS semantics explicitly carried by a stream from/to the outside connection to/from any device in the BSS Why is it needed In order to guarantee the QoS needs of a stream without having to guess at what those needs are In order to be able to analyze/pass the QoS request from wired connections between STAs

3 March 2000 doc.: IEEE 802.11-00/38 SubmissionSlide 3 Rajugopal Gubbi (Sharewave) What is the Scenario (Example-A, Home/Enterprise environment) End-to-end QoS Gateway A H.323 Video Conferencing Unit C Kitchen WEB browser panel D Personal computer B Outside connections like, DSL and Cable modem Negotiate QoS within 802.11WLAN

4 March 2000 doc.: IEEE 802.11-00/38 SubmissionSlide 4 Rajugopal Gubbi (Sharewave) End-to-end QoS What is the Scenario (Example-B, SoHo and Enterprise environment) Gateway A H.323 Video Conferencing Unit C Portal D Personal computer B Outside connections like, DSL and Cable modem Outside connections another set of wired devices Negotiate Qos within 802.11WLAN and pass the requirements further

5 March 2000 doc.: IEEE 802.11-00/38 SubmissionSlide 5 Rajugopal Gubbi (Sharewave) End-to-end QoS How it can be achieved Device analyzes and converts the semantics of an outside QoS connection into similar semantics on the 802.11-WLAN Device negotiates the 802.11- WLAN QoS based on requests from an outside connection using the already discussed mechanism within 802.11-WLAN Device reject an outside connection or renegotiate the Qos, if the requested QoS cannot be achieved on 802.11-WLAN Device passes on the QoS requests from an outside connection through the 802.11-WLAN to the rx device for further analysis

6 March 2000 doc.: IEEE 802.11-00/38 SubmissionSlide 6 Rajugopal Gubbi (Sharewave) End-to-end QoS RSVP type of Layer-3 messages for QoS Application to 802.11-MAC (at Layer-3) must handle the RSVP type of bandwidth requests and inform the MAC through an interface. 802.11-MAC must not handle/alter RSVP type of Layer-3 messages. The MAC must use the mechanism in our proposal to control the bandwidth usage and achieve QoS if the MAC can not achieve the required QoS, it should inform the application and also signal the achievable QoS.

7 March 2000 doc.: IEEE 802.11-00/38 SubmissionSlide 7 Rajugopal Gubbi (Sharewave) End-to-end QoS RSVP type of Layer-3 messages for QoS (cntd..) The application must either disconnect the stream or generate RSVP response type of Layer-3 messages to inform the peer application. This retains the advantages of layering as defined and mandated by 802 Ideally QoS Interfaces between the Layer-3 and MAC must be made generic so that similar QoS can be achieved on all QoS-aware MACs

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