FOXCOMM

User Technical Committee

Radio Technology Discussion

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FoxCommPublic Safety Communications

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Agenda

• Radio Terms/Definitions

Multicast vs. SimulcastAnalog vs. DigitalConventional vs. TrunkingFrequency Considerations

• Interop / Mutual Aid / Migration

• Data

• Comments/Questions?

Multicast vs. Simulcast

CALL PHON PROG

HO ME

f1 f2 f3 f4 f5 f6

Different frequencies at each siteGood fit when excess channels availableMobile coverageLow number of talkpaths required at a site

Multicast

Simulcast

CALL PHON PROG

HOME

f1 f2 f3 f4 f5 f6f1 f2 f3 f4 f5 f6

Most frequency efficient architectureMore Coverage with overlapEnhanced In-Building CoverageSite Expansion Without Additional FrequenciesExpansion Without Reprogramming Radios

Simulcast Configurations Improves “Shadowing”

Analog vs. Digital

Analog vs. Digital Radios

Modulator/Amplifier

Analog Radio

Digital Radio

Modulator/Amplifier

Analog/Digital

Converter

Conventional and TrunkedVHF, UHF, 700 and 800Mhz

Benefits of Digital Technologies

Improved Signaling Capabilities

Excess bandwidth used for signaling & control

Enhanced features such as Unit IDs Identification, Adaptive Power Control, etc. Forward Error Correction

DigitizedAudio

EmbeddedSignaling

Benefits of Digital Technologies Improved Audio Quality

Audio

Quality

Signal StrengthStrong Weak

Good

Poor

Digital

Analog

Conventional vs. Trunking

Conventional Radio

CallCallBlockedBlocked

Channel 1Channel 1In UseIn Use

Channel 2Channel 2Not In UseNot In Use

EMS

Fire Police

EMS Police

Chan 1 Chan 2

Fire

Idle Voice Communication

1 32 5

Controller

Idle

EMS Fire

Police

Trunked System - Talkgrouping

Talkgroups “rest” on the control channelTalkgroup receives voice channel grant upon requestWhen conversation complete all units return to control channel

Idle

4

Police

Trunking Features

• Talkgrouping

• Push To Talk ID

• Emergency

• Private Call

• Call Alert

• Scan

• Priority

• Busy Queing

Frequency Band Considerations

Frequency Band Considerations –Organized vs. Unorganized

136MHz 172MHz

824MHz 851MHz 869MHz764MHz 776MHz 794MHz

700/800 MHz

VHF

Base TXBase RX

Frequency Band Considerations – Physical Space

19 RU

VHF 700/800MHz

Frequency Band Considerations – Site Selection

20ft (min)

40ft (min)

VHF• Restricted

• Water Towers are not usable

700/800 MHz• Not as Restricted

• Water Towers are usable

Bldg Type

Building Loss (dB)

ExampleVHF

700/800 MHz

Light 8 4 Residential, Small Commercial

Medium 20 14 Apartments, Office Buildings

Heavy 30 18 Shopping Mall, Large Commercial

Frequency Considerations – In Building Penetration Losses

Operational Issues

Coverage (Specifically - In Building) Potential Solutions: Simulcast

700/800MHz

Congestion/Capacity Potential Solutions: Trunking

700/800MHz

Interference Potential Solutions: 700/800MHz

Interoperability / Mutual Aid / Migration

Interoperability/Mutual Aid/Migration

Scenario #1 – Incident occurs within 700/800MHz coverage area.

Issue: How do users operating on a 700/800MHz system talk to neighbors who operate on VHF?

Possible Solution – VHF mutual aid channel(s) are integrated into the 700/800MHz system and patched to mutual aid talkgroups for VHF mutual aid/interoperability. The patch can be set up “on the fly” or permanently through the console.

VHF700MHzIP

IP Network

Interop - Scenario #1

Interop – Scenario #1

IP Network

VHF700MHzIP4W

Interoperability/Mutual Aid Continued

Scenario #2 – Incident occurs outside of the 700/800MHz coverage area.

Possible Solution(s) 1. Portable Cross-Band DVRS 2. 700/800MHz Mutual Aid Repeater to extend

coverage into neighboring counties3. Portable Swap4. Carry Two Subscribers (VHF and 700/800MHz)

NOTEMobile and portable on the street coverage will extend

well beyond county borders

VHF RADIO COVERAGE RANGE

700MHz RADIO COVERAGE RANGE

Interop - Scenario #2 - Portable DVRS Solution

Why use DVRS?

PORTABLE RADIO COVERAGE RANGE

MOBILE RADIO COVERAGE RANGEDVRS Extends Portable

Radio Communications in Areas where only Mobile

Radio Coverage is available.

DVRS Extends Portable Radio Communications in

RF Shielded Areas.

Why use DVRS?

MOBILE and Portable On the Street RADIO COVERAGE RANGE

DVRS Provides a Migration Path for users operating

with VHF subscribers

How does it work?

Outbound Calls

Local Portable

DVRSSYSTEM MODE

(DVR + XTL)

XTL AntDVR Ant

How does it work?Inbound Calls

In Car MonitorLocal Portable

Local Portable

System Portable

XTL AntDVR Ant

DVRSSYSTEM MODE

(DVR + XTL)

XTL AntDVR Ant

How does it work?Mobile Microphone PTT

Local Portable

System Portable

XTL AntDVR Ant

DVRSSYSTEM MODE

(DVR + XTL)

XTL AntDVR Ant

Data

Tier 1 – 9.6/19.2 kbps

Tier 1 – 9.6/19.2 kbps

Tier 2 - 100 kbpsTier 2 - 100 kbps

Text BasedText Based BrowserBrowser

•Messaging–Dispatch–Text messaging

• Query Databases–Driver’s

License–License Plates–Warrants

•Messaging–Dispatch–Text messaging

• Query Databases–Driver’s

License–License Plates–Warrants

•Includes Tier 1•Fingerprints (Tx)•Mug Shots (Tx/Rx)•Reports (Tx)•Intranet (constrained)

•Internet (constrained)

•AVL

•Includes Tier 1•Fingerprints (Tx)•Mug Shots (Tx/Rx)•Reports (Tx)•Intranet (constrained)

•Internet (constrained)

•AVL

VideoVideo

Tier 3 – 200k-1MTier 3 – 200k-1M Tier 4 - MegabitsTier 4 - Megabits

MultimediaMultimedia

•Includes Tier 1&2•Intranet Access•Internet Access•Images (Tx/Rx)•Video (buffered)•Remote Camera

•Includes Tier 1&2•Intranet Access•Internet Access•Images (Tx/Rx)•Video (buffered)•Remote Camera

•Includes Tier 1-3•Office Apps•Video (full

motion)•Video (buffered)•Multimedia•Remote camera

viewing / control•OTAP (reflash

mobile radios)•Video archiving

•Includes Tier 1-3•Office Apps•Video (full

motion)•Video (buffered)•Multimedia•Remote camera

viewing / control•OTAP (reflash

mobile radios)•Video archiving

Mission Critical Data Solutions

Push Enter to Begin…

Optimal Performance Enables New ApplicationsLoading…

Tier 2

Tier 3

Tier 1 (19.2kbs)

Tier 1 (9.6kbs)

DONE…..

Primary Data System(City Wide)

Primary Data System(City Wide)

Primary Voice System( County, Region, State or Nationwide)

Primary Voice System( County, Region, State or Nationwide)

80

MCLB(at Hot Spots)

MCLB(at Hot Spots)

9.6 kbps9.6 kbps

96 kbps96 kbps

230 kbps230 kbps

HotspotsHotspotsup toup to

54 Mbps54 MbpsHigh Speed

(City Wide)

High Speed(City Wide)

Motorola’s Mission Critical Data Platform

Questions?

Comments?