# Presentation: 073757

## High-Speed Wireless Access to the Internet

- Dr. Mike Ritter
- MWRitter@metricom.com
- Chief Technology Officer
- Metricom, Inc.; Los Gatos CA

- Metricom’s RicochetTM Service

- www.ricochet.net

## Why Wireless Internet?

- Freedom from the Office
- Leave Your Desk Behind
- Freedom to Work
- Any Time You Want
- Any Where You Want
- Access to Information While Mobile

**Wireless Internet **
**Sets You Free**

## Wireless Internet

- Cellular3G?

**Wireless Internet**

- CDPD

- CDMA

**End User Speed, kb/s**

**Range**

**Stationary &**
**Desktop**

**National**
**Urban**

**Campus**

**Indoor**
**Only**

**National**
**Everywhere**

**Limited Metro **
**Areas**

- Wireless-LANs

- RAM, ARDIS

- Fixed Point
- Microwave
-  or Fiber

**Ricochet**

- LEO Satellite

- 2 Way Paging

- What’s available now

- xDSL

- Cable
- Internet

- 2.5G?

**Ricochet4G**

**Ricochet**

- , next year

- , and the future.

- Modems

- ISDN

## How Big is Wireless Internet?

**All Arrows Pointing Up**

- The Strategis Group

**20 million**
**Mobile **
**Data**
**Subs**
**by**** **
**2004**

**20 million**
**Mobile **
**Data**
**Users**
**by**
**2004**

- TheYankee Group

**$20-25 Billion**
**Mobile Data **
**Service business**
**by**
**2007**

- SalomonSmithBarney

**36 million**
**Wireless **
**Data**
**Subs**
**by**** **
**2003**

- Dataquest

**Notes:**
No matter how you look at it, it’s getting bigger.  It’s HUGE!

## About Metricom and itsRicochet Wireless Service

- The Internet Experience
- Any where, Any time

## Metricom’s Business

***Metricom designs, provisions, and ***
***operates wireless digital networks ******and services for mobile users***

**Using Unlicensed Spectrum ****to Deliver High-Speed,**
**Wireless, Mobile Access**

## Ricochet Wireless Internet

-   Always On
-  High-Speed
-   Low, Fixed Cost
-   Secure and Reliable

***Replicate Your Desktop Anywhere***

## Ricochet Services

- Current Service
- Up to 28.8+ kb/s
- 30,000+ Subscribers in 3 Major Markets
**Silicon Valley and the SF Bay Area; Seattle; Washington,DC**
**12 Major Airports, parts of Manhattan & Los Angeles**
**Coverage maps available at our website: ****	****www.ricochet.net**
- Next Generation
- 128 kb/s and more coverage areas

## 128 kb/s Availability

**San Francisco**

**Los Angeles**

**Seattle**

**Houston**

**Chicago**

**Philadelphia**

**Atlanta**

**San Diego**

**Phoenix**

**New York**

**Dallas**

- 12 Markets Summer 2000

**Washington**

- Over 40 Markets by mid-2001

- Over 100 million People

## Ricochet “MicroCells” Install on Streetlights

## RicochetThe High-Speed Architecture

- Network Interface
- Facility (NIF)

- Public Spectrum
- “Part 15”  WAP

**900 MHz**

- Licensed Spectrum
**“**WCS**”** WAP

**2.4 GHz**

**2.3 GHz**
**(or 2.4 GHz)**

**128 kb/s**
**Speeds**

- MCDNTM Mesh
- of Dual-Band
- “Part 15”
- MicroCells

- Internet

- High-Speed
- Backbone

- Wireless
- Modem

## Part 15 Unlicensed Spectrum

- Allows for innovation
- Last place to develop RF device in a garage
- Part 15 is an extremely efficient use of spectrum
- Part 15 devices operate in shared spectrum
- Must not cause interference to...
- Must accept interference from...
- ALL OTHER SERVICES
- Unlicensed operation expects interference
- Equipment must be designed to operate despite interference

## Sharing Public (Part 15) Spectrum

- Part 15.247 requires low power, spread spectrum techniques
- Originally used by the military to hide transmissions and overcome interference
- Transmissions look like random noise to other radios
- Allows multiple, overlapping users
- Efficient spectrum usage through sharing
- compared to older technologies which are not built to tolerate interference

## How does Frequency Hopping Spread Spectrum Work?

- Heddy Lamar invented the idea of frequency hopping using a piano and filed the first patents during WWII
- Each transmitter sends small bursts of data on many different frequencies (frequency hopping)
- A receiver listens in synchronization with the transmitter’s frequency hopping pattern to isolate the data from that one transmitter
- Many conversations can be going on at the same time

## MicroCellular ConceptFrequency Reuse

- Low power with spread spectrum allows many small, overlapping cells
- Low power provides huge amounts of capacity as distant cells can reuse the spectrum
- Spread spectrum allows the cells to overlap each other, further increasing the capacity

## Regulatory Framework

- Can Ricochet service be available in my area?

## It Will Be, If the FCC Continues to Assure

- Adequate unlicensed spectrum
- More spectrum allows capacity and speed
- Simple rules
- Intelligent networks and radios, not massive etiquettes
- Reasonable occupants
- Need simple rules to ensure good neighbors
- Regulatory stability
- Commitment to support and protect unlicensed, shared spectrum allocations

## Ricochet Also Requires Access to Rights-of-Way

- We need to place antennas and radios along public rights-of-way
- We need uniform regulations for guaranteed access to public rights-of-way
- Uniform regulations would benefit the public by
- Speeding up deployment
- Lowering the cost of service

## Ricochet Facts

- Fast
- Affordable
- Compatible
- Transportable
- Secure
- 1-800-GO-WIRELESS

** **_[www.ricochet.net](http://www.ricochet.net/)_