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TGn Overview: Next Generation High-Speed Wireless LAN Standard

This document provides an overview of TGn, the task group responsible for defining the next generation standard for high-speed wireless LANs. It discusses the motivation behind the need for higher throughput, the goals of the group, and the timeline for the development of the new standard.

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TGn Overview: Next Generation High-Speed Wireless LAN Standard

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  1. TGn Overview Portland, Oregon, US July 2004 Bruce Kraemer, Chair bkraemer@conexant.com July 15, 2004 Kraemer, Conexant; Hillman, AMD

  2. TGn Motivation • Demand for WLANs is expected to grow at a 50% Compounded Annual Growth Rate (CAGR) over the next five years. Over 50% of all home-networking connections and over 40% of all mobile PC network connections will be over WLAN by 2005. • New usages such as simultaneous transmission of multiple HDTV signals, audio, and on-line gaming, will drive the need for higher throughput in the home. • As usage increases in the corporate and other high-density environments, bandwidth restrictions of a shared media will begin to be realized. This is very similar to what happened in the wired Ethernet market where the need for higher throughput drove the development and adoption of Fast Ethernet. • The need for higher throughput drove switching and 100Base-TX adoption. While a switching technology would ultimately be desired for WLAN, this is not technically feasible. The next logical step in wireless LAN technology is to increase the data throughput of each WLAN Connection. Kraemer, Conexant; Hillman, AMD

  3. IEEE P802.11 - TGn Backgrounder • TGn will define the next generation standard for high speed wireless LANs. • The group's basic goal is to develop a standard capable of providing at least 100Mbps throughput at the MAC service access point. • Existing 802.11 standards are typically designated by their peak physical data rates. For example, 802.11a has a peak data rate of 54Mbps. This amendment has chosen to use a performance metric of throughput measured at the MAC data SAP. This amendment seeks to improve the peak throughput to at least 100Mbps, measured at the MAC data SAP. Depending on the scenario, this represents an improvement of at least 4 times the throughput obtainable using existing 802.11 systems. • Technical mechanisms for accomplishing this have not yet been determined by the task group but may include techniques such as spatial multiplexing, channel expansion, low density coding and a variety of other MAC efficiency improvement techniques • TGn has defined comprehensive Functional Requirements, Comparison Criteria, Usage Scenarios, and Simulation Environments which must be addressed by the proposals in order to be considered for the final standard. Kraemer, Conexant; Hillman, AMD

  4. Additional Project Goals • The MAC SAP interface will remain the same as for the existing 802.11 standard. • The MAC SAP definition shall not be altered ensuring that all LLC and MAC interfaces are compatible to and in conformance with the IEEE 802.1 Architecture, Management and Internetworking standards. • The proposed amendment shall introduce no 802.1 architectural changes. • The scope of the MAC and PHY enhancements assume a baseline specification defined by 802.11 and its amendments and anticipated amendments a, b, d, e, g, h, i and j. The enhancements shall be to support higher throughput. The amendment shall not redefine mechanisms in the baseline that do not pertain to higher throughput. • Some of the modes of operation defined in the HT amendment shall be backwards compatible and interoperable with 802.11a and/or 802.11g. Kraemer, Conexant; Hillman, AMD

  5. Time line You are here IEEE 802 Sessions Open Monday Sep 13 Monday May 17, 2004 No later than midnight GMT -5 Friday Aug 13 No later than midnight GMT -5 Friday June 18 80 days 50 days 30 days 30 days • Event #3 • Documents posted on IEEE server • Technical Proposal • CC Compliance Report • FR Compliance Report Event #1 Issue call for proposals Event #2 Intent to present Full or Partial proposal notification submitted Event #4 All Proposals Presented in TGn Session Kraemer, Conexant; Hillman, AMD

  6. Overall timeline 2003 2004 2005 2006 2007 HT SG Formed Publication PAR Approved TGn Formed ExCom NESCOM Approval First Sponsor Letter Ballot Selection Process & Criteria Call for Proposals First WG Letter Ballot First Proposal Presentations Down Select Kraemer, Conexant; Hillman, AMD

  7. 4. Time line - Proposed • Schedule Highlights • Issue First Letter Ballot on Draft 1.0 July 2005 • 3 sessions to review edit (Sep, Nov, Jan, Mar) • Issue First Sponsor Ballot Mar 2006 • 3 sessions to review & edit ( May, July, Sept) • Complete Sponsor ballot – accepted by ExCom Nov 2006 • Publish Mar 2007 Kraemer, Conexant; Hillman, AMD

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