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Doc.: IEEE 802.11-07/2605r0 SubmissionSlide 1 September 2007 Jason A. Trachewsky, et. al. (Broadcom Corporation)Slide 1 Per-User Data Rate, Band and Bandwidth.

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Presentation on theme: "Doc.: IEEE 802.11-07/2605r0 SubmissionSlide 1 September 2007 Jason A. Trachewsky, et. al. (Broadcom Corporation)Slide 1 Per-User Data Rate, Band and Bandwidth."— Presentation transcript:

1 doc.: IEEE /2605r0 SubmissionSlide 1 September 2007 Jason A. Trachewsky, et. al. (Broadcom Corporation)Slide 1 Per-User Data Rate, Band and Bandwidth Options for VHT Date: Authors: Notice: This document has been prepared to assist IEEE 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 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 Working Group. If you have questions, contact the IEEE Patent Committee Administrator at.http:// ieee802.org/guides/bylaws/sb-bylaws.pdf

2 doc.: IEEE /2605r0 SubmissionSlide 2 What Per-User Data Rates Do We Want to Support? Per-User Data Rates –3-5+ Gbps New applications like wireless docking, thin clients, etc. Supporting small numbers of users, probably non-simultaneous – Mbps Traditional WLAN applications Supporting large numbers of possibly-simultaneous users –Must we choose? Jason A. Trachewsky, et. al. (Broadcom Corporation)

3 doc.: IEEE /2605r0 SubmissionSlide 3 Unlicensed/License-Free Band and Bandwidth Options f c < 6 GHzf c > 57 GHz BW < 100 MHzBW > 100 MHzBW < 500 MHzBW > 500 MHz Data rates > 1 Gbps, fc > 5 GHz Data rate limit around 1 Gbps Data rates up to several Gbps Jason A. Trachewsky, et. al. (Broadcom Corporation)

4 doc.: IEEE /2605r0 SubmissionSlide 4 Band Challenges < 6 GHz –Existing a and n users –20/40/x (x = 80, 120, 160, ??) coex!! –Only about 100 MHz of spectrum available in some regulatory domains > 57 GHz –No existing standardized communication systems – TG3c is hard at work, defining WPAN in the GHz band Plan to use ~2 GHz at one time –Far greater path and materials absorption losses Jason A. Trachewsky, et. al. (Broadcom Corporation)

5 doc.: IEEE /2605r0 SubmissionSlide MHz MHz MHz MHz The 5-6 GHz Regulatory Situation lower* middle* upper band 40mW 200mW 800mW P max indoor indoor outdoor * +23 dBm EIRP for ETSI MHz MHz U-NII Low/Middle Bands and ETSI Low Band ETSI High Band U-NII High Band upper band +30 dBm* EIRP max * except for ch dBm EIRP Additional channels from 4920 to 5080 MHz are defined only in Japan. Jason A. Trachewsky, et. al. (Broadcom Corporation)

6 doc.: IEEE /2605r0 SubmissionSlide 6 The 60 GHz Opportunity Up to 9 GHz of unlicensed/licensed-free spectrum available in some regulatory domains (57-66 GHz). This huge amount of spectrum available at reasonably- high to very high power spectral density and EIRP.  the possibility of actually achieving > 1 Gbps on the air at > 1 m range! Jason A. Trachewsky, et. al. (Broadcom Corporation)

7 doc.: IEEE /2605r0 SubmissionSlide 7 Note: China currently has no 60 GHz regulations and there is no effort under way in China to put 60 GHz regulations in place. The Worldwide 60 GHz Regulatory Situation Jason A. Trachewsky, et. al. (Broadcom Corporation)

8 doc.: IEEE /2605r0 SubmissionSlide 8 Frequency bandMaximum transmit powerDuty cycleChannel spacingNotes A minimum spectrum requirement of 500 MHz is requested. +57 dBm e.i.r.p. (+20 dBm nominal with up to +37dBi antenna gain or +10 dBm nominal with up to +47dBi antenna gain) No restriction The transmit power is necessary to offset oxygen and material attenuation at this band, and is typical for gigabit commercial product in this band NOTE:A license-exempt scheme is proposed to the National Regulatory Authorities for applications other than aeronautical mobile and inter-satellite communications. Users may not claim protection from interference from other users within the same spectrum for this kind of application. 60 GHz Regulatory Issues Focus: EU Jason A. Trachewsky, et. al. (Broadcom Corporation)

9 doc.: IEEE /2605r0 SubmissionSlide 9 60 GHz Propagation and Link Budget Summary Relative to 5 GHz band –60 GHz has 6-10 times the available bandwidth –21 dB additional path loss (excluding shadowing effects) – dB less transmitter power* –greater antenna gain (and more elements) possible in small volumes –significantly greater loss through building materials –Near-term significantly greater cost LOS channels at limited range can achieve data rates > 2 Gbps with simple transceivers NLOS channels can also achieve > 2 Gbps rates, but will require higher-complexity transceivers * This is not a fundamental limit and certainly may be debated. Jason A. Trachewsky, et. al. (Broadcom Corporation)

10 doc.: IEEE /2605r0 SubmissionSlide 10 Simple 60 GHz Link Budget Example Ptx = +10 dBm Gtx = +10 dBi Grx = +10 dBi Ntx = Nrx = 1 NF = 8 dB Gap from capacity = 7 dB Even with severe shadowing, 1 Gbps at 2 m is feasible with one antenna. Jason A. Trachewsky, et. al. (Broadcom Corporation) Channel parameters from private home model, /191

11 doc.: IEEE /2605r0 SubmissionSlide 11 Going Forward VHT SG needs to limit the scope of possible bands, bandwidths and per-user data rates to consider. Practical unlicensed/license-free band choices include 5-6 GHz and GHz.


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