doc.: ieee 802.11-06/0yyyr0 submission july 2006 eldad perahia (intel), et alslide 1 proposal for...

July 2006

Eldad Perahia (Intel), et al

Slide 1

doc.: IEEE 802.11-06/0YYYr0

Submission

Proposal for TGy

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.

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Date: 2006-07-17Authors:

Name Company Address Phone email

Eldad Perahia Intel JF3-3362111 NE 25th AveHillsboro, OR 97124

503-712-8081 [email protected]

Jim Petranovich

Conexant [email protected]

Jason Trachewsky

Broadcom [email protected]

July 2006


Slide 2


Submission

Abstract

• The FCC created the 3650-3700 MHz to enable cheap rural wireless internet access

• The FCC regulations include contention based protocol, power limits, and emission limits

• The TGy PAR specifies that TGy only applies to 3650-3700 MHz band in the USA

• The scope and purpose includes extensions to 11a, 11j, and 11h– Specification of new regulatory class

– Sensing of other transmitters

• We present a proposal for TGy which meets the requirements of the PAR and FCC regulations

July 2006


Slide 3


Submission

Background on 3650-3700 MHz Band

• The intent of the FCC was to create a band that was useful for cheap rural wireless internet access:– FCC Report & Order 05-56: “2. We affirm our belief that the 3650 MHz

band is well-suited to respond to the needs expressed by the growing number of entrepreneurial wireless internet service providers (WISPs), that currently bring broadband services to consumers particularly those living in rural areas of the United States. Today, rural consumers often have fewer choices for broadband services than consumers in more populated areas…”

• Domestic use includes protection zones for FSS and government radar, in addition, off-shore navy radar

• FCC mandates contention based protocol

• Operation of a system will require licensing and registration

July 2006


Slide 4


Submission

Enabling a Market in 3650 MHz• Potential Market for this Band (See next slide for regional restrictions)

– US only• §90, not §15• Requires licensing and registration

– Rural– Backhaul– Low density deployments– Long range

• This type of specialized use and market does not have the volume to support custom technology

• Simple modifications to current standard is the best solution– Reuse of existing 11a PHY will allow for re-use of available baseband silicon, enabling the

market– Reuse TGj work

• A great deal of time and effort was spent on dealing with the same channelization and MAC timing issues– No modifications are necessary for range extension

• The high EIRP afforded to us by the FCC (25 Watts for fixed, 1 Watt for mobile) enables long range• Section 17 already contains 5 & 10 MHz channelization which provides longer guard intervals • Potential use of directional antennas also reduces the delay spread of the channel• Section 17 already contains MAC timing modifications for 5 & 10 MHz channelization (slot time, SIFS,

CCA time)

July 2006


Slide 5


Submission

Metropolitan Areas Requiring Coordination with FSS and Government Sites

Many large metropolitan areas are restricted!

FSS protection zones in blue

Government protection zone in green

Top 50 counties by population (2000 census) in red

July 2006


Slide 6


Submission

TGy PAR

• The scope of the proposed project is the application of 802.11 based systems to the 3650-3700 MHz band in the USA.

• The purpose of this project is to standardize the mechanisms required to allow shared 802.11 operation with other users in the 3650-3700 MHz band in the USA. Likely required mechanisms include: • Specification of new regulatory classes (extending 802.11j) • Sensing of other transmitters (extending 802.11a) • Transmit Power Control (extending 802.11h) • Dynamic Frequency Selection (extending 802.11h)

July 2006


Slide 7


Submission

General Approach

• Extend 11j to new regulatory class

• No changes required for 5 & 10 MHz channelization, already exists in Section 17 (11a) in P802.11-REVma-D6.0

• Modify CCA for detection at lower levels

• Minimal change to support beaconing for mobile devices (if we want to support them)

July 2006


Slide 8


Submission

FCC Regulations and Minimum Required Changes in dot11

July 2006


Slide 9


Submission

§ 90.7 Definitions• Contention based protocol: A protocol

that allows multiple users to share the same spectrum by defining the events that must occur when two or more transmitters attempt to simultaneously access the same channel and establishing rules by which a transmitter provides reasonable opportunities for other transmitters to operate. Such a protocol may consist of procedures for initiating new transmissions, procedures for determining the state of the channel (available or unavailable), and procedures for managing retransmissions in the event of a busy channel.

• Dot11 modifications– CCA

• Need lower levels than 11a (-62dBm in 20MHz) for better sharing with non-802.11 systems: -82 dBm for example

– 11a CCA is based on OFDM preamble detection, other available measurements

• DFS in 11h already provides RPI measure

• 11k already provides RCPI, ANPI, and RSNI

• We could specify CCA based on these measures

– Define maximum transmission time before channel sensing?

• Could reuse Japanese 4ms CS rule

July 2006


Slide 10


Submission

§ 90.1307 Licensing

• The 3650-3700 MHz band is licensed on the basis of non-exclusive nationwide licenses. Non-exclusive nationwide licenses will serve as a prerequisite for registering individual fixed and base stations. A licensee cannot operate a fixed or base station before registering it under its license and licensees must delete registrations for unused fixed and base stations.

• Dot11 modifications– Modify Annex I & J to include

this band

July 2006


Slide 11


Submission

§ 90.1321 Power and antenna limits• (a) Base and fixed stations are limited to 25

watts/25 MHz equivalent isotropically radiated power (EIRP). In any event, the peak EIRP power density shall not exceed 1 Watt in any one-megahertz slice of spectrum.

• (b) In addition to the provisions in paragraph (a) of this section, transmitters operating in the 3650-3700 MHz band that emit multiple directional beams, simultaneously or sequentially, for the purpose of directing signals to individual receivers or to groups of receivers provided the emissions comply with the following:...

• (c) Mobile and portable stations are limited to 1 watt/25 MHz EIRP. In any event, the peak EIRP density shall not exceed 40 milliwatts in any one-megahertz slice of spectrum.

• Dot11 modifications – Add power levels to Annex I

& J

July 2006


Slide 12


Submission

§ 90.1323 Emission limits• (a) The power of any emission outside a

licensee's frequency band(s) of operation shall be attenuated below the transmitter power (P) within the licensed band(s) of operation, measured in watts, by at least 43 + 10 log (P) dB. Compliance with this provision is based on the use of measurement instrumentation employing a resolution bandwidth of 1 MHz or less, but at least one percent of the emission bandwidth of the fundamental emission of the transmitter, provided the measured energy is integrated over a 1 MHz bandwidth.

• (b) When an emission outside of the authorized bandwidth causes harmful interference, the Commission may, at its discretion, require greater attenuation than specified in this section.

• Dot11 modifications– Add spectral mask to Annex I

– Add channelization to Annex J

• We just need to select the channels (center frequencies given below, as an example)

– 20MHz: 3665+i*20, i = 0,1

– 10MHz: 3660+i*10, i = 0,1,2,3

– 5MHz: 3657.5+i*5, i = 0,1…,7

– This channel assignment leaves 5MHz guard band at high and low ends for protection again high power radar and FSS in neighboring bands

July 2006


Slide 13


Submission

Why Guard Band is Necessary?

• FCC Report & Order 05-56: – 72. Furthermore, we reiterate to potential users of the 3650-3700

MHz band that the adjacent 3600-3650 MHz band is used by high power federal government radar systems and they are not limited to the three protected sites. Consequently, terrestrial transmitter/receiver manufacturers will likely find the need to incorporate design measures to protect their equipment from possible overload by these adjacent band radar signals. The Commission strongly recommends that parties installing equipment in this band should determine if there are any nearby Federal Government radar systems that could affect their operations. Information regarding the locations and operational characteristics of the radar systems operating adjacent to this band are provided in NTIA TR-99-361.

July 2006


Slide 14


Submission

§ 90.1331 Restrictions on the operation of base and fixed stations

• (a) (1) Except as provided in paragraph (a)(2) of this section, base and fixed stations may not be located within 150 km of any grandfathered satellite earth station operating in the 3650-3700 MHz band. The coordinates of these stations are available at [website].

• (2) Base and fixed stations may be located within 150 km of a grandfathered satellite earth station provided that the licensee of the satellite earth station and the 3650-3700 MHz licensee mutually agree on such operation.

• (3) Any negotiations to enable base or fixed station operations closer than 150 km to grandfathered satellite earth stations must be conducted in good faith by all parties.

• (b) (1) Except as specified in paragraph (b)(2) of this section, base and fixed stations may not be located within 80 km of the following Federal Government radiolocation facilities:

• St. Inigoes, MD - 38° 10’ N., 76°, 23’ W.• Pascagoula, MS - 30° 22’ N., 88°, 29’ W.• Pensacola, FL 30° 21’ 28” N., 87°, 16’ 26” W.• Note: Licensees installing equipment in the 3650-3700 MHz band

should determine if there are any nearby Federal Government radar systems that could affect their operations. Information regarding the location and operational characteristics of the radar systems operating adjacent to this band are provided in NTIA TR-99-361.

• (2) Requests for base or fixed station locations closer than 80 km to the Federal Government radiolocation facilities listed in paragraph (b)(1) of this section will only be approved upon successful coordination by the Commission with NTIA through the Frequency Assignment Subcommittee of the Interdepartmental Radio Advisory Committee.

• Dot11 modifications– Devices will need to

coordinate with FSS and government radiolocation sites prior to registration.

– This is beyond the scope of the standard, so no modifications required

July 2006


Slide 15


Submission

§ 90.1333 Restrictions on the operation of mobile and portable stations

• (a) Mobile and portable stations may operate only if they can positively receive and decode an enabling signal transmitted by a base station.

• (b) Any mobile/portable stations may communicate with any other mobile/portable stations so long as each mobile/portable can positively receive and decode an enabling signal transmitted by a base station.

• (c) Airborne operations by mobile/portable stations is prohibited.

• Dot11 modifications– Do we care to enable mobile device?

– If so,• Mandate infrastructure mode, no IBSS

with mobile clients

• Mobile client must receive and decode beacon from AP before transmitting

• Specify the maximum amount of time that can lapse between mobile STA receiving and decoding a beacon and transmitting a packet (500ms?)

• Will need to differentiate between fixed and mobile client

July 2006


Slide 16


Submission

§90.1337 Operation near Canadian and Mexican borders

• (a) Fixed devices generally must be located at least 8 kilometers from the U.S./Canada or U.S./Mexico border if the antenna of that device looks within the 160° sector away from the border. Fixed devices must be located at least 56 kilometers from each border if the antenna looks within the 200° sector towards the border.

• (b) Fixed devices may be located nearer to the U.S./Canada or U.S./Mexico border than specified in paragraph (a) of this section only if the Commission is able to coordinate such use with Canada or Mexico, as appropriate.

• (c) Licensees must comply with the requirements of current and future agreements with Canada and Mexico regarding operation in U.S./Canada and U.S./Mexico border areas.

• Dot11 modifications– The location and pointing

direction and possible coordination will need to be determined before registration


July 2006


Slide 17


Submission

§ 90.1319 Policies governing the use of the 3650-3700 MHz band.

• (a) Channels in this band are available on a shared basis only and will not be assigned for the exclusive use of any licensee

• (b) Any base, fixed, or mobile station operating in the band must employ a contention-based protocol.

• (c) All applicants and licensees shall cooperate in the selection and use of frequencies in the 3650-3700 MHz band in order to minimize the potential for interference and make the most effective use of the authorized facilities. A database identifying the locations of registered stations will be available at <http://wireless.fcc.gov/uls>. Licensees should examine this database before seeking station authorization, and make every effort to ensure that their fixed and base stations operate at a location, and with technical parameters, that will minimize the potential to cause and receive interference. Licensees of stations suffering or causing harmful interference are expected to cooperate and resolve this problem by mutually satisfactory arrangements.

• Dot11 modifications– Licensees should examine

the FCC database for neighboring systems prior to registration


July 2006


Slide 18


Submission

§ 90.203 Certification required

• (1) Applications for all transmitters must describe the methodology used to meet the requirement that each transmitter employ a contention based protocol (see §§ 90.7, 90.1305 and 90.1321 of this part);

• (2) Applications for mobile transmitters must identify the base stations with which they are designed to communicate and describe how the requirement to positively receive and decode an enabling signal is incorporated (see § 90.1333 of this part); and

• (3) Applications for systems using advanced antenna technology must provide the algorithm used to reduce the equivalent isotropically radiated power (EIRP) to the maximum allowed in the event of overlapping beams (see § 90.1321 of this part).

• (4) Applications for fixed transmitters must include a description of the installation instructions and guidelines for RF safety exposure requirements that will be included with the transmitter. (See § 90.1335).

• Dot11 modifications – Covered by

other slides

July 2006


Slide 19


Submission

Conclusion

• An amendment must meet the TGy PAR and FCC regulations

• TGy PAR– TGy only applies to 3650-3700 MHz band in the USA– Extensions to 11a, 11j, and 11h

• Specification of new regulatory class• Sensing of other transmitters

• FCC– Contention based protocol allowing multiple users to share the

same spectrum– Power limits– Emission limits

July 2006


Slide 20


Submission

Backup

July 2006


Slide 21


Submission

Protection Zones around Grandfathered FSS and Government Sites

Reference:FCC-05-56

“…Furthermore, we reiterate to potential users of the 3650-3700 MHz band that the adjacent 3600-3650 MHz band is used by high power federal government radar systems and they are not limited to the three protected sites… The Commission strongly recommends that parties installing equipment in this band should determine if there are any nearby Federal Government radar systems that could affect their operations…”

July 2006


Slide 22


Submission

Shipboard Radars Operating/Testing Areas (3.1-3.7GHz)

FCC Part 2.106, Note US349:“The band 3650-3700 MHz is also allocated to the Federal radiolocation service on a non-interference basis for use by ship stations located at least 44 nautical miles in off-shore ocean areas on the condition that harmful interference is not caused to non-Federal operations”

Reference: NTIA TR-99-361.

July 2006


Slide 23


Submission

Airborne Radars Operating/Testing Areas (3.1-3.7GHz)


military operating areas (MOAs)restricted areas (RAs)military training routes (MTRs)

July 2006


Slide 24


Submission

Land Based Radar Sites (3.1-3.7GHz)


Fort Lewis Yakima Firing Center

Fort Carson Fort Riley

Hunter AAF Fort Gillem

Fort Benning Fort Rucker

Yuma Proving Grounds

Fort Hood

Fort Knox

Fort Bragg Fort Campbell

Fort Polk

Fort Leonard Wood

Fort Irwin

Fort Sill

Fort Bliss

Fort Leavenworth

Fort Drum

Fort Gordon

Fort McCoy

Fort Dix

Parks Reserve Forces Training Area

Aberdeen Proving Ground

Fort Huachuca

Fort Monmouth

Picatinny Arsenal

Redstone Arsenal

White Sands Missile Range

Army Research Laboratory

Fort Hunter Ligget

Kelly Support Facility

July 2006


Slide 25


Submission

References

• NTIA TR-99-361

• FCC Part 2.106

• FCC-05-56

doc.: ieee 802.11-06/0yyyr0 submission july 2006 eldad perahia (intel), et alslide 1 proposal for...

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