User Technical Committee Radio Technology Discussion FOXCOMM User Technical Committee Radio Technology Discussion

Agenda Radio Terms/Definitions Multicast vs. Simulcast Analog vs. Digital Conventional vs. Trunking Frequency Considerations Interop / Mutual Aid / Migration Data Comments/Questions?

Multicast vs. Simulcast

Multicast f f f f f f Different frequencies at each site Good fit when excess channels available Mobile coverage Low number of talkpaths required at a site C A L P H O N R G M E f f f f f f 1 2 3 4 5 6

Simulcast Most frequency efficient architecture More Coverage with overlap Enhanced In-Building Coverage Site Expansion Without Additional Frequencies Expansion Without Reprogramming Radios C A L P H O N R G M E Much like the stereo speakers on the previous slide, a simulcast trunked radio system broadcasts the same audio information on the same frequency. To function properly a well designed simulcast radio system assures that the signal arrives at the receiving unit (portable or mobile radio) at the same time and under the same conditions. f 1 2 3 4 5 6 f 1 2 3 4 5 6

Simulcast Configurations Improves “Shadowing”

Analog vs. Digital

Analog vs. Digital Radios Modulator/ Amplifier Analog Radio Digital Radio Modulator/ Amplifier Analog/ Digital Converter Conventional and Trunked VHF, 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 Digitized Audio Embedded Signaling

Benefits of Digital Technologies Improved Audio Quality Good Audio Quality Analog Poor Strong Signal Strength Weak

Conventional vs. Trunking

Conventional Radio Chan 1 Chan 2 Channel 2 Channel 1 EMS Police Fire Channel 1 In Use Channel 2 Not In Use Call Blocked Currently Transportation is using Channel 1. Fire needs to communicate, but they can not until Transportation is finished. In the meantime, Risk Management’s Channel 2 is sitting idle. This is a waste of a needed resource. The Risk Management channel sits idle while the demand piles up on the shared channel between transportation and SIU. Not only is this wasteful, Fire must listen to another departments conversation, and wait for an opportunity to grab the channel. EMS Police Fire

Trunked System - Talkgrouping EMS Fire Voice Communication Idle Idle Idle 1 2 3 4 5 Police The radios in the SIU talkgroup internally switch to Channel 4 and everyone in the SIU talkgroup can begin talking. All of this usually occurs in less than 500 ms (1/2 second). All other users on other talkgroups will receive the outbound assignment information and ignore it as the information is not for their talkgroup. There is a voltage controlled oscillator within the radio which allows it to transmit at any selected frequency. However, the radio can only communicate on one frequency. Once it switches from the control channel to the voice channel, it is no longer communicating with the central controller on the control channel. Also, the communication is only half-duplex. The radio can either be transmitting or receiving, but not both simultaneously. Controller Talkgroups “rest” on the control channel Talkgroup receives voice channel grant upon request When conversation complete all units return to control channel

Trunking Features Talkgrouping Push To Talk ID Emergency Private Call Call Alert Scan Priority Busy Queing Police

Frequency Band Considerations

Frequency Band Considerations – Organized vs. Unorganized Base TX Base RX VHF 136MHz 172MHz 700/800 MHz 764MHz 776MHz 794MHz 824MHz 851MHz 869MHz

Frequency Band Considerations – Physical Space 700/800 MHz VHF 19 RU

Frequency Band Considerations – Site Selection VHF Restricted Water Towers are not usable 700/800 MHz Not as Restricted Water Towers are usable 20ft (min) 40ft (min)

Frequency Considerations – In Building Penetration Losses Bldg Type Building Loss (dB) Example VHF 700/800 MHz Light 8 4 Residential, Small Commercial Medium 20 14 Apartments, Office Buildings Heavy 30 18 Shopping Mall, Large Commercial

Coverage (Specifically - In Building) Operational Issues Coverage (Specifically - In Building) Potential Solutions: Simulcast 700/800MHz Congestion/Capacity Potential Solutions: Trunking Interference Potential Solutions: 700/800MHz

Interoperability / Mutual Aid / Migration

Interoperability/Mutual Aid/Migration Issue: How do users operating on a 700/800MHz system talk to neighbors who operate on VHF? Scenario #1 – Incident occurs within 700/800MHz coverage area. 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.

Interop - Scenario #1 IP Network VHF 700MHz IP

Interop – Scenario #1 VHF 700MHz IP 4W IP Network

Interoperability/Mutual Aid Continued Scenario #2 – Incident occurs outside of the 700/800MHz coverage area. NOTE Mobile and portable on the street coverage will extend well beyond county borders Possible Solution(s) Portable Cross-Band DVRS 700/800MHz Mutual Aid Repeater to extend coverage into neighboring counties Portable Swap Carry Two Subscribers (VHF and 700/800MHz)

700MHz RADIO COVERAGE RANGE VHF RADIO COVERAGE RANGE Interop - Scenario #2 - Portable DVRS Solution 700MHz RADIO COVERAGE RANGE VHF RADIO COVERAGE RANGE

DVRS Extends Portable Radio Communications in RF Shielded Areas. Why use DVRS? DVRS Extends Portable Radio Communications in RF Shielded Areas. PORTABLE RADIO COVERAGE RANGE DVRS Extends Portable Radio Communications in Areas where only Mobile Radio Coverage is available. MOBILE RADIO COVERAGE RANGE

MOBILE and Portable On the Street RADIO COVERAGE RANGE Why use DVRS? DVRS Provides a Migration Path for users operating with VHF subscribers MOBILE and Portable On the Street RADIO COVERAGE RANGE

How does it work? Outbound Calls DVRS SYSTEM MODE (DVR + XTL) XTL Ant DVR Ant Local Portable

How does it work? Inbound Calls DVRS SYSTEM MODE (DVR + XTL) XTL Ant DVR Ant XTL Ant DVR Ant System Portable In Car Monitor Local Portable Local Portable

How does it work? Mobile Microphone PTT DVRS SYSTEM MODE (DVR + XTL) XTL Ant DVR Ant XTL Ant DVR Ant System Portable Local Portable

Data

Mission Critical Data Solutions Tier 1 – 9.6/19.2 kbps Tier 2 - 100 kbps Video Tier 3 – 200k-1M Tier 4 - Megabits Multimedia Includes Tier 1&2 Intranet Access Internet Access Images (Tx/Rx) Video (buffered) Remote Camera Includes Tier 1-3 Office Apps Video (full motion) Remote camera viewing / control OTAP (reflash mobile radios) Video archiving Includes Tier 1 Fingerprints (Tx) Mug Shots (Tx/Rx) Reports (Tx) Intranet (constrained) Internet (constrained) AVL Messaging Dispatch Text messaging Query Databases Driver’s License License Plates Warrants Text Based Browser

Optimal Performance Enables New Applications DONE….. Loading… Push Enter to Begin… Tier 2 Tier 1 (19.2kbs) Details of the Applications Performance Slide The slide simulates the download of a file 37.5 kB JPEG file The simulated networks are: HPD -> 96 kbs raw data rate HSD50 -> 230 kbs raw data rate DataTac -> 19.2 kbs raw data rate IV&D -> 9.6 kbs raw data rate No middleware compression was factored into the simulation. Tier 3 Tier 1 (9.6kbs)

( County, Region, State or Nationwide) Motorola’s Mission Critical Data Platform Primary Voice System ( County, Region, State or Nationwide) 9.6 kbps 96 kbps 230 kbps 80 Primary Data System (City Wide) MCLB (at Hot Spots) Hotspots up to 54 Mbps Vision: IVD and HPD are ASTRO 25 IP Data solutions…..we can offer TODAY. Excellent coverage to meet the needs of users and applications. If higher data rates are needed, then Wideband Data and Broadband can be offered. Wideband Data is planned in the 700 MHz band with 50 KHz channel allocations. KEY MESSAGE: We are planning a range of DATA SOLUTIONS to cover the VARIED NEEDS of customers. High Speed (City Wide)

Questions? Comments?