November 06 doc IEEE 802 15 06 0492
November 06 doc. : IEEE 802. 15 -06 -0492 -00 -0000 Project: IEEE P 802. 15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: WNG Liaison Report, November 2006 Date Submitted: 11/17/2006 Source: Michael Mc. Innis, The Boeing Company Address P. O. Box 3707 M/S 7 M-CA, Seattle, Washington 98124 Voice: 206 -290 -7758, E-Mail: michael. d. mcinnis@boeing. com Abstract: This document highlights the actions taken by the IEEE 802. 11 WNG SC during the November 2006 Plenary meeting in Dallas, Texas Purpose: Liaison report Notice: This document has been prepared to assist the IEEE P 802. 15. 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 acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P 802. 15. Submission 1 M. Mc. Innis, The Boeing Company
November 06 doc. : IEEE 802. 15 -06 -0492 -00 -0000 IEEE 802. 11 WNG Liaison Report for November 2006 Mike Mc. Innis Submission 2 M. Mc. Innis, The Boeing Company
November 06 doc. : IEEE 802. 15 -06 -0492 -00 -0000 Contribution Highlights • 802. 11 WNG November 2006 Opening Report – 11 -06 -1743 -00 -0 wng-wnc-sc-report. ppt • Four presentations were given – – Two regarding multicast Two regarding co-operative cross layer communications Document numbers in the order they were presented are; – 11 -06 -1687 -00 -0 wng-802 -11 -multicast-issues-multimedia-applications. ppt – 11 -06 -1747 -00 -0 wng-power-saving-issues-multicast-applications. ppt – 11 -06 -1767 -00 -0 wng-cooperative-cross-layer-communication. ppt – 11 -06 -1642 -00 -0 wng-coopmac-a-cooperative-mac-compliant-with-ieee-80211. ppt Submission 3 M. Mc. Innis, The Boeing Company
November 06 doc. : IEEE 802. 15 -06 -0492 -00 -0000 Contribution Highlights Multicast Issues for Multimedia Application – 11 -06 -1687 -00 -0 wng-802 -11 -multicast-issues-multimedia-applications. ppt Issue 1 – Reliability – Unreliable Multicast – No ACK mechanism and retransmission mechanism – No mechanism like RTS/CTS to solve the hidden node problem Issue 2 – Fairness – No Backoff procedure – Always fixed contention window size – On each collision • Unicast packet: binary exponential back-off • Multicast packet: no back-off Issue 3 – Rate Adaptation – The lowest PHY data rate – Channel access probability of all hosts is equal – Strong influence of a slow host on overall WLAN performance Issue 4 – Multicast Group Management – No mechanism for multicast group management – No discrimination between Multicast packet and Broadcast packet Submission 4 M. Mc. Innis, The Boeing Company
November 06 doc. : IEEE 802. 15 -06 -0492 -00 -0000 Contribution Highlights Power Saving Limitation for Multicast Applications – 11 -06 -1747 -00 -0 wng-power-saving-issues-multicast-applications. ppt Power management scheme in 802. 11 standards The limitation of the scheme for multicast cases The needs for power saving Conclusions – The power management design in current 802. 11 standards has very limited capability to tackle power saving for multicast cases. – The background multicast traffic may have distinguishable impacts on the power consumption especially when the data rate to the mobile station is less than or comparable with the background traffic. Therefore, there is still big room for us to decrease the power consumption for video broadcasting / multicasting cases. – It is possible to design a new power conservation scheme to help power conservation for the mobile station, while keeping the compatibility with the existing standards. Submission 5 M. Mc. Innis, The Boeing Company
November 06 doc. : IEEE 802. 15 -06 -0492 -00 -0000 Contribution Highlights Cooperative Cross-Layer Communication – 11 -06 -1767 -00 -0 wng-cooperative-cross-layer-communication. ppt This presentation introduces various PHY layer cooperative communication concepts to the 802. 11 community. Significant performance (throughput, range, reliability, etc. ) enhancements are possible by the “cooperative” use of STAs in a 802. 11 network, as opposed to “combative” use. Some Cooperative Methods – – – Submission Amplify and Forward Cooperative Coding Cooperative Symbol Rotation Cooperative HARQ Network Coding 6 M. Mc. Innis, The Boeing Company
November 06 doc. : IEEE 802. 15 -06 -0492 -00 -0000 Contribution Highlights Coop. MAC: A cooperative MAC compliant with IEEE 802. 11 – 11 -06 -1642 -00 -0 wng-coopmac-a-cooperative-mac-compliant-with-ieee 802 -11. ppt This document presents a new Cooperative MAC protocol called Coop. MAC: – Coop. MAC takes advantage of the multi-rate capability of the current 802. 11 standard and assists “slow” stations, improving the performance of the whole network. – A slow station, instead of sending its packets using a “slow” one hop transmission, uses a “helper”, i. e. a station that is located between the transmitter and the receiver, and sends its packets by using a two “fast” hop transmission. – Wireless link is unreliable (broadcast channel + diversity) – Solution: Use another mobile to relay information – Optional function: The destination can process signals from both mobiles – Spatial diversity through relay’s antenna – Results in • Higher reliability, higher data rates, increased battery life, extended coverage • Leverage both the cooperation and multirate capabilities of 802. 11 MAC Submission 7 M. Mc. Innis, The Boeing Company
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