In-Building Wireless Program - ouc.dc.gov · Inbuilding Systems: What are they? ... IP connectivity solution description Pdf/Word. GOVERNMENT OF THE DISTRICT OF COLUMBIA. PUBLIC SAFETY

GOVERNMENT OF THE DISTRICT OF COLUMBIA PUBLIC SAFETYOffice of Unified Communications PUBLIC SERVICE

In-Building Wireless Program

OverviewGuy Jouannelle


Outline

Background Process

Project Implementation Yearly Testing

Technical Requirements

DC-OUC In-Building Wireless Program 2


Background


Background New building construction material significantly reduce indoor radio

coverage District of Columbia Legislation / IFC Adoption (2015) to provide for

public safety (emergency responder) coverage in buildings Language is general Mandatory for newly constructed facilities Specifies that building owners must comply with OUC requirements,

specifications, and criteria. Requirements apply to existing buildings

The FCC requires that BDAs owners obtain from the frequencies licensee an authorization to transmit

Experience demonstrates that poor selection of BDA technology and/or poor engineering practices can dramatically hurt the host network (the P25 public safety network)



Examples of Negative Impact of BDAs On DC Radio Network

September 2013: A BDA improperly set up did shut down several frequencies system wide for 1

week January 2015:

A poorly maintained BDA/DAS system disrupted firefighters communications during an event at LEnfant Plaza metro station

December 2016: A BDA improperly set up created interference to the St Elizabeth site

impacting quality of service March 2017:

A BDA improperly set up impacted quality of service around the Freedom Plaza

June 2017: A BDA improperly set up created interference into 3 sites, significantly

degrading the coverage and intermittently shutting down channels



Inbuilding Systems: What are they? In-building systems are known as DAS in the

industry, a bit misleading as they are made of 2 components:

Bi-Directional Amplifier (BDA) picks up signal off-the air from the Host site from a donor antenna and repeats it down to a

Distributed Antenna System (DAS) that through a set of small antennas and coax or fiber cables brings the signal into the depths of the building

Reversely the DAS antennas pick up the signal from radio devices, transport the signal through the coax/fiber cables to the BDA. The BDA repeats the signal towards the Host site through the donor antenna



Frequent BDA/DAS Technical Issues Mild uplink interference: Incrementally reduces the uplink coverage

across the whole site coverage including users outside of the building Severe uplink interference: Can shut down frequencies across the

whole system Near-far effect: Users close to the antenna can blind the system to

the detriment of users further out External Interference: Can shut down frequencies or blind the DAS Spill: Coverage from the DAS outside the building can interfere with

existing coverage Oscillation: Feedback effect created by lack of isolation between the

donor antenna and the DAS antennas



Other Issues Encountered

Poorly designed systems Default settings or max power

Lack of remote monitoring capabilities: Need to connect and upgrade equipment if

necessary Poor or non-existent maintenance of the

equipment: Need preventative testing



Process


Preliminary Comments Documentation available at:

https://ouc.dc.gov/page/oucs-public-safety-building-radio-systems-requirements

All email communications with OUC to: [email protected]

All communications with OUC shall include a site code reference To obtain the code, execute step 1 of the process

described in following slides Communications that do not include site code will be

ignored.


https://ouc.dc.gov/page/oucs-public-safety-building-radio-systems-requirementsmailto:[email protected]


Step 1 Project Initiation Building owner submits an authorization request OUC adds to database and assigns unique ID / Site Code Number

Step 2 Design Validation Building owner submits design documentation / equipment specifications / personnel certifications OUC reviews and approves design documentation / submittals Vendor installs equipment

Step 3 System Acceptance OUC approved vendor inspects system upon installation complete OUC approved vendor coordinates test schedule with OUC OUC approved vendor conducts testing per OUC requirements / submits results Building owner submits As-Built diagrams and cable sweep results OUC coordinates Fire Marshall test OUC provides transmission authorization letter

Step 4 Continuous Operation / Annual Inspection System monitoring via OCTO-NOC OUC maintains remote access and credentials for emergency shut down of system OUC maintains emergency contact info Building owner provides scheduled maintenance Annual test / inspection by OUC authorized vendor

12

Building Owner Costs

Testing by OUC approved vendor

Equipment maintenance contracts

Remote monitoring licenses

Remote monitoring connectivity

Annual testing by OUC approved vendor

Mandatory Sequence of Tasks


OUC Transmission Authorization Process



Step 1-Project Initiation


Vendor submits an authorization request OUC issues a Site Code number to the vendor This Site Code:

Serves as a reference for all further communications

Needs to be included in the email for any further communications


Vendor Fills In The Form


SITE CODE (For the OUC to complete)

Site Name: PSCC Existing Building NoAddress: 310 McMillan Drive NW If Yes, was coverage test performed?City: Washington Building permit B2415278State: DC Date targeted for completion of building construction Aug-18ZipCode: 20001

OUC rep. technical info: Guy JouannelleCompany: OUCTel: 240-447-0679Email: [email protected]

Building rep.technical contact info: Jane DoeCompany: Consultant Inc.Tel: 1-800-277-4653Email: [email protected]

Building Manager contact info: John DoeCompany: Building IncTel: 1-800-725-6737Email: [email protected]

Comments

Person who will interactwith the OUC during theimplementation of theproject

Person whowill receive thetransmissionauthorization

Site Info

Header

SITE CODE Yes

(For the OUC to complete)No

Site Name:PSCCExisting BuildingNo

Address:310 McMillan Drive NWIf Yes, was coverage test performed?

City:WashingtonBuilding permitB2415278

State:DCDate targeted for completion of building constructionAug-18

ZipCode:20001

Comments

OUC rep. technical info:Guy Jouannelle

Company:OUC

Tel:240-447-0679

Email:[email protected]

Building rep.technical contact info:Jane Doe

Company:Consultant Inc.

Tel:1-800-277-4653


Building Manager contact info:John Doe

Company:Building Inc

Tel:1-800-725-6737


&"-,Bold"&16&F

&"-,Bold"Site Information&D&P/&N

mailto:[email protected]:[email protected]:[email protected]


OUC Provides Site Code


SITE CODE (For the OUC to complete)

Site Name: PSCC Existing Building NoAddress: 310 McMillan Drive NW If Yes, was coverage test performed?City: Washington Building permit B2415278State: DC Date targeted for completion of building construction Aug-18ZipCode: 20001

OUC rep. technical info: Guy JouannelleCompany: OUCTel: 240-447-0679Email: [email protected]

Building rep.technical contact info: Jane DoeCompany: Consultant Inc.Tel: 1-800-277-4653Email: [email protected]

Building Manager contact info: John DoeCompany: Building IncTel: 1-800-725-6737Email: [email protected]

PR-77

Comments

Header

SITE CODE PR-77Yes

(For the OUC to complete)No

Site Name:PSCCExisting BuildingNo

Address:310 McMillan Drive NWIf Yes, was coverage test performed?

City:WashingtonBuilding permitB2415278

State:DCDate targeted for completion of building constructionAug-18

ZipCode:20001

Comments

OUC rep. technical info:Guy Jouannelle

Company:OUC

Tel:240-447-0679


Building rep.technical contact info:Jane Doe

Company:Consultant Inc.

Tel:1-800-277-4653


Building Manager contact info:John Doe

Company:Building Inc

Tel:1-800-725-6737


&"-,Bold"&16&F

&"-,Bold"Site Information&D&P/&N

mailto:[email protected]:[email protected]:[email protected]


Step 2: Design ValidationVendor submits design that: Meets the OUC

performance requirements Includes the equipment

specifications Includes the mandatory

technical information Includes the personnel

certification(s)

OUC reviews design for: Completeness of

submission (see Design Check List)

Compliance of the equipment

Compliance of performance


The vendor needs to submit the design checklist form filled in


Design Checklist-Header


Site CodeSite NameAddressCityStateZip CodeEstimated time of completion

Project Contact NameCompany:Tel:Email

Number of Floors in the buildingLocation of Equipment (Room Number/Floor)Donor SiteBDA Equipment Brand & ModelDAS Equipment Brand & ModelNumber of Remote UnitsOther Radio System? (VHF, commercial)


Design Checklist Team credentials Site Info Equipment

Specifications Power Calculations RF Calculations Labeling


Site CodeSite Name 0Address 0

Item Check Document CommentSite address Header tabProject PM contact info Header tabLead Designer IBWave certificate pdfLead Installer/Integrator BDA vendor certificate pdfLead Installer/Integrator DAS vendor certificate pdfConstruction permit pdfFloor Plans pdfNumber of Floors Header tabLocation of equipment (room number) Header tabBDA Equipment Brand & Model Header tabDAS Equipment Brand & Model Header tabNumber of Remote Units Header tabBattery Back up calculations Word/ExcelAffidavit Battery Emergency generator-when installedPre-existing coverage test (if applicable) pdfDonor site(s) identified Header TabOUC Uplink Evaluation Spreadsheet (attached to tech rqts) ExcelLink budgets downlink ExcelLink budgets uplink ExcelNetwork Layout with labeling: pdf

Active componentsSplitters/couplersremotesantennascables

BOM Excel/Word/pdfEquipment Specifications Documentation

Donor antenna pdf Surge protector pdf Splitters/couplers pdfRF cables pdfBDA pdfFiber Head end (if applicable) pdfFiber remote (if applicable) pdfDAS antenna pdfBatteries pdf

Existence of other radio system HeaderIntermod calculations (if other radio system) pdfCoverage maps (1 for each floor) pdfIP connectivity solution description Pdf/Word


Step 3: System AcceptanceOnce system installed vendor: Checks the system meets OUC

requirements Submits personnel

certifications Submits as-built drawings to

OUC & cables sweeps results Submits maintenance

contracts & remote access info Selects OUC approved vendor

for testing and shares documentation

Meets the Testing Pre-requisites

OUC approved vendor:

Coordinates the test with the OUC (test configuration)

Performs the acceptance testing according to OUC process

Fills in the test chart When successful notifies the

OUC and submits test report


The OUC schedules then the Fire Marshal for his validation test Upon success, OUC issues transmission authorization letter


Acceptance Testing Pre-Requisites 1/3

Documentation Technical PM contact info Lead personnel certificate(s) from system(s) manufacturer(s) As built drawings including antenna layout, identification of remote units (if applicable)

locations and coverage areas, coverage maps, link budgets, labels, equipment specifications

Antenna and cable sweep testing results PIM Testing results Maintenance contract with BDA vendor Maintenance contract with DAS vendor Monitoring system licenses Emergency contact information Building Manager contact information

That documentation shall be sent to [email protected]. DC-OUC In-Building Wireless Program 21

mailto:[email protected]


Acceptance Testing Pre-requisites 2/3

Site completion Statement regarding the building completion including which floors have interior walls,

ceilings etc. Statement regarding the Das installation completion: is it installed at its permanent

location, is the current installation matching the approved design, will additional antennas be installed etc.

The vendor shall provide the following information regarding access to the site:

Potential locations where the OUC representative can park when coming to the site Indication if the elevators in the building are working and if an escort is required to

move throughout the building Verification of access to space, hotel rooms, apartments, etc.: ALL ROOMS SHALL BE

TESTED

Existence of loading docks/etc. if they will be accessible with a vehicle.



Acceptance Testing Pre-requisites 3/3

Technician Verification that the technician present has all necessary equipment to access BDA/DAS

management system. Verification that the technician is capable of changing antenna azimuth for donor

antenna if alternate donor site is selected by OUC/OUC representative. Ensure that the technician has assorted spare attenuation pads (or variable pads) if

adjustments are determined necessary. Ensure the technician brings a spectrum analyzer and a signal generator.

Configuration. Vendor has verified that BDA is configured and bench tested with 1 filter per OUC

Channel. (Deviations to be approved by OUC in advance) Verification that the BDA has been configured with adequate padding to protect it from

OUC Macro sites, and uplink has been padded/configured per OUC noise rise criteria. Verification that the Hot signal test site has been completed and adequate protection

provided. This test is described



Pre-Requisites-Header


Test Date:Site Code & Name:

Building Manager contact info: Integrator contact info:Company: Company:Tel: Tel:Email: Email:

Emergency Contact info OUC rep. technical NameCompany: Company:Tel: Tel:Email: Email:

BDA Fiber DASBDA located in room: Fiber DAS located in roomDonor Site Name Number of remotesBDA Brand/Model Number Fiber DAS Brand/Model NumberIP addressLogging NamePassword


Pre-requisites Checklist


Date 01/00/00Site 0

PRE-TESTING Required PASS FAIL Value Comment (include what failed/passed)Emergency contact informationBuilding Manager contact informationAs built drawings

System & antennas layoutIdentification of remote unitsCoverage mapsDL Link budgetUL Link Budget

IP addressUsernamePasswordDownlink signal received at BDA inputExact lat-long of donor antennaAntenna and cable sweep testing resultsPIM Testing results (if applicable)BDA uplink input noise measurement (over a 15 mn period)

Site completionExplain here what part of the building is completed

DAS installation completionExplain here what part of the building the DAS is installed in

Description of testing areaExplain here what part of the building is occupied and what will be approved

GuyJouannelle:Fill in highlighted cells


Acceptance Testing CheckList-Header


Test Date: 02/20/18 Result PASS Site Code & Name: PR-72 Wharf 1

Building Manager contact info: Building rep.technical contact info:Company: Company:Tel: Tel:Email: Email:

Emergency Contact info OUC rep. technical NameCompany: Company:Tel: Tel:Email: Email:

BDA located in room: Fiber DAS HeadEnd located in roomBDA Brand/Model Number Number of remotesIP address Fiber DAS Brand/Model NumberUserName FiberDAS HeadEnd UL Received signalPassword FiberDAS HeadEnd DL Received signal

BDA Uplink Gain 0 Donor Site Name 4DBDA Downlink Gain 0 Host Site Noise Reference Level 0BDA Uplink Squelch Threshold Path Loss (dB) 0Isolation BDA UL Output noise 0

Noise Contribution to host site 0Description of building readiness & other comments as necessary Max signal received at donor site 0

Min signal received at donor site 0


Acceptance Check List


Date 02/20/18Site PR-72 Wharf 1

TESTING Reference in ATP requirements doc Required PASS FAIL Value Comment (include what failed/passed)Head End Room

Grounding Section 4.4NEMA4-Type Enclosure BDA Section 4.4NEMA4-Type Enclosure Fiber DAS Headend Section 4.4NEMA4-Type Enclosure Batteries Section 4.4Labeling (cables, antennas, Remotes) Section 4.4

Enclosure signage Section 4.4Rooftop

Antenna Section 4.4Grounding Section 4.4Surge Arrestor Section 4.4Donor Site Section 4.4 4D

Battery Back up Test Section 4.4Alarms Section 4.4Remote access to monitoring Section 4.3BDA Check

29 Frequencies programmed (UL & DL) Section 4.5Channels 12.5 kHz wide Section 4.5Spectrum scan check Section 4.5 Attach screen captureLevel check across band Section 4.5

Uplink gain adjustmentHost noise measurement Section 4.6-1Near Signalmeasurement @ host after adjustment Section 4.6-3Lowest signal measurement @ host after adjustment Section 4.6-3UL Gain Section 4.6-3DL Gain Section 4.6-3Near-Far Test Section 4.6-4Noise measurement out of BDA Section 4.7-B Path Loss Section 4.7-AUplink Noise contribution evaluation Section 4.7-B 0

Squelch adjustmentUplink DAS noise measurement Section 4.8Squelch Threshold Section 4.8

Update of link Budget UL completedUpdate link Budget DL completedIsolation Test Section 4.9Frequencies availability verification Section 4.10Commercial DAS interference check (if applicable) Section 4.11Audio Test results (DAQ 3.4) Section 4.12Coverage Test plot and statistics (-95 dBm) Section 4.13DAS Antennas RSSI measurements baseline (Spreadsheet) Section 4.13

GuyJouannelle:Fill in highlighted cells


Acceptance Testing-Remotes Check


Date:Site: PR-72 Wharf 1Number of Remotes: 1

Remotes Room

Loca

tion

Labe

ling

Batt

ery

Chec

k

Chan

nel 1

Chan

nel 2

Chan

nel 3

Chan

nel 4

Chan

nel 5

Chan

nel 6

Chan

nel 7

Chan

nel 8

Chan

nel 9

Chan

nel 1

0

Chan

nel 1

1

Chan

nel 1

2

Chan

nel 1

3

Chan

nel 1

4

Chan

nel 1

5

Chan

nel 1

6

Chan

nel 1

7

Chan

nel 1

8

Chan

nel 1

9

Chan

nel 2

0

Chan

nel 2

1

Chan

nel 2

2

Chan

nel 2

3

Chan

nel 2

4

Chan

nel 2

5

Chan

nel 2

6

Chan

nel 2

7

Chan

nel 2

8

Chan

nel 2

9

Remote 01 Room 1 OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK

Frequencies

02/20/18


Acceptance Testing Coverage Baseline


Date: 02/20/18Site: PR-72 Wharf 1

Fringe areas: Those are elevators lobbies, exist stairs, exit path ways, emergency and standby power rooms, and any location the testing sowed th Area ID Name Location description

1 Rm 510 residential room minimal coverage2 Garage 1 mechanical rooms.

ANTENNA BASELINE REFERENCE LEVELS

Active. # Ant. Label RSSI Ant. # nt. Labe RSSI Ant. # nt. Labe RSSI Ant. # nt. Labe RSSIBDA ant 41 -52 BDA ant 38 -52BDA ant 42 -58 BDA ant 39 -58BDA ant 43 -58 BDA ant 40 -58

Ant. # Ant. Label RSSI Ant. # nt. Labe RSSI Ant. # nt. Labe RSSI Ant. # nt. Labe RSSIBDA ant 1 -55 BDA ant 33 -58 BDA ant 4 -48BDA ant 2 -58 BDA ant 5 -52BDA ant 3 -62 BDA ant 3 -52

BDA ant 34 -65

Floor 13 Floor 12 Floor 11 Floor 10

Floor 9 Floor 8 Floor 7 Floor 6


Fire Marshall Validation



Transmission Authorization



Contact Info OUC

[email protected] Program Manager, Guy Jouannelle, 240-447-0679,

[email protected] RF Engineer, Mathew Theisz, 202-480-5854, [email protected]

OUC certified vendors Wireless Communications, Sharon Deteresi, 202-345-6404

[email protected] Motorola, Austin Miles, 240-429-8976

[email protected]



Continuous Operations System monitoring connected to OCTO-NOC

Licenses and connectivity costs supported by the building owner

Remote access and credentials to shut down system Emergency contact number Maintenance contracts Yearly test

Performed by approved OUC vendor Submits affidavit of compliance OUC issues continuation of operations authorization



Continuous Operations Authorization



Continuous Operations Testing Process

On a yearly basis: Building owner notifies OUC approved vendor Vendor performs testing

If the test is successful then Vendor sends affidavit to OUC OUC issues transmission authorization

Else Vendor issues a report detailing issues Building owner provide a fix plan within a couple of days OUC suspends transmission authorization while owner repairs



Technical Requirements


Frequencies

DC-OUC In-Building Wireless Program 37Transmitted by 10 sites

Transmitted by 4D only

27 806.0125 851.012528 807.0125 852.012529 806.5125 851.5125

27 806.0125 851.0125

28 807.0125 852.0125

29 806.5125 851.5125


OUC P25 SitesOUC sites Latitude Longitude ERP(dBm)

Azim. ()

Uplink Gain Antenna

4D 38.96297 -77.02666 49 225 4.1Sinclair SE419SF3P4LDFFletcher Johnson 38.88419 -76.93334 53 200 13Sinclair SE419SF3P4LDFGeorge Washington Univ. 38.90164 -77.04850 49 0 3.5Sinclair SC412HF2LDFGeorgetown Univ. Hosp. 38.91140 -77.07590 55 0 13.3Sinclair SC412HF2LDFOne Judiciary Sq. 38.89537 -77.01565 54 0 13.3Sinclair SC412HF2LDFReeves Ctr. 38.91722 -77.03242 54 0 11.7Sinclair SC412HF2LDFRhode Island 38.92750 -76.98028 54 0 11.5Sinclair SC412HF2LDFSibley Hospital 38.93685 -77.10830 53 110 12.3Sinclair DSSE419SF3PALDFSt. Elizabeth's Hospital 38.84889 -76.98639 53 310 11.5Sinclair SE419SF3P4LDFUDC Bldg. 41 38.94389 -77.06639 52 125 11.5Sinclair SE419SF3P4LDF



Equipment

Channelized BDAs: 1 filter per frequency (Class A)

Support 29 frequencies UL Squelch



Performance Requirements-Coverage

Signal Levels Includes stairways and elevator machine rooms DAQ = 3.4 Downlink: -95 dBm @ 95% Uplink : -95 dBm or 18 dB above noise floor and less than -45

dBm Signal received at input of BDA :

5dB below max operating power specified by vendor 10 dB below damaging power BDA protection need to be ensured for mobiles where it makes sense

(garage) Use Link budget tool to demonstrate last point



Interference

Worst case locations need to meet coverage criteria

Noise generated at host receiver need to be 15 dB below noise floor Cannot be read on a spectrum analyzer Needs to be estimated

Uplink squelch threshold set 5 dB above noise measured at BDA



Link Budget - HeaderSite Name:Site Code:Address:City WashingtonState DCZip Code

Donor Site One Judiciary Sq.

Prepared by:On:Company:Tel:Email

UL calculator v2.5.5 2017-07-20



OUC P25 Sites


AssumptionsIn Building Noise Floor -115dBmMax power from OUC unitmobile radio 45dBmportable 36dBm

OUC safety factor added manufacturer's specsLevel above which BDA may be damaged 10dBLevel above which BDA will clip 6dB

OUC factor for per channel max power on a composite powerOUC downlink active channels 20 13dBOUC uplink simultaneous channels used directly under a single DAS antenna 2 3.01dBOUC uplink simultaneous channels (on DAS) 6 7.78dB

OUC sitesNoise floors Latitude Longitude

ERP (dBm)

Azimuth () Uplink Gain Antenna

4D -115dBm 38.96297 -77.02666 49 225 4.1Sinclair SE419SF3P4LDFFletcher Johnson -115dBm 38.88419 -76.93334 53 200 13Sinclair SE419SF3P4LDFGeorge Washington Univ. Hosp -115dBm 38.90164 -77.04850 49 0 3.5Sinclair SC412HF2LDFGeorgetown Univ. Hosp. -115dBm 38.91140 -77.07590 55 0 13.3Sinclair SC412HF2LDFOne Judiciary Sq. -112dBm 38.89537 -77.01565 54 0 13.3Sinclair SC412HF2LDFReeves Ctr. -115dBm 38.91722 -77.03242 54 0 11.7Sinclair SC412HF2LDFRhode Island -115dBm 38.92750 -76.98028 54 0 11.5Sinclair SC412HF2LDFSibley Hospital -115dBm 38.93685 -77.10830 53 110 12.3Sinclair DSSE419SF3PALDFSt. Elizabeth's Hospital -115dBm 38.84889 -76.98639 53 310 11.5Sinclair SE419SF3P4LDFUDC Bldg. 41 -115dBm 38.94389 -77.06639 52 125 11.5Sinclair SE419SF3P4LDF


Designer SettingsDesigner Inputs

RF Conditions EstimatesTargeted OUC donor site transmitted power (EiRP) 54dBmMAX Estimated downlink RSSI from Host site at BDA input [Host Site EiRP] - [FreeSpace Path Loss] + [donor antenna gain] + [Targeted

Site Uplink Gain*] =* See "OUC Assumptions" tab

-23dBm

BDA and DAS Equipment manufacturer's specifications

Max BDA uplink input powerDesigner Inputs

Level above which the BDA may sustain damage 10dBm BDA Configuration

Level above BDA normal operations level(Clip, shutdown or wideband AGC) vendor specific. If not published use [Max UL Tx Power] - [Gain] + [per ch dynamic gain/Level control] -8dBm Configured BDA uplink gain 95dB

MAX (Composite uplink) Transmitted Power Output the BDA is capable of (clip level) 27dBm BDA uplink max AGC 60dB

DAS Configuration BDA max Squelch (attenuation not threshold) 60dBDAS Antenna gain 2dBi Additional Recommended Attenuation

Minimum cable and combiner loss from BDA to DAS antennas 14dBExternal padding required at UL input to prevent BDA damage (passive only) 0dB

Closest distance a subscriber can approach a DAS antennaAdditional padding required at UL input to ensure BDA operational power (passive or wideband digital) 15dB

Mobile 10ft. Total input attenuation needed 15dB

Portable 6ft.Additional attenuation to protect ouc site (output) 0dB

Expected PerformanceMax allowed noise tranmission level -50dBm

Expected uplink noise level transmitted by BDA as configured -35dBm

Expected uplink noise level as configured/w sqlch -95dBmDC-OUC In-Building Wireless Program 44


Objectives vs. MeasurementsOUC Performance RequirementsC/I objective at host receiver 18dBMax accepted power at OUC host sites' receivers -45dBmTarget for received noise at host site is 15dB below the noise floor

Donor - Host RF Conditions MeasuredHost site receiver noise floor (measured) -115dBmUplink signal transmitted through donor antenna and measured at host site receiver -40dBmTransmitted power through the donor antenna for path loss measurement(account for any duplexors or coax that is bypassed in measurement)

35dBmPropagation Loss Donor Antenna -> Host receive

75dB

Digital input attenuation configured -23dB

These values will be affected by gain setting and should be evaluated after that is set

Design Objectives vs. Measurements Objective vs. Measured

Max Permitted Transmitted Power Output from BDA per channel 30dBm

Max noise transmit power from BDA: applies to quiescent amplifer as well as non keyed channels when single channel is keyed

-55dBm output padding may be necessary to meet output power or noise requirements

-51

Max BDA input uplink power (BDA input) -22

dBm Max signal received from Mobile at Active UL input (After attenuation) -18dBmMax signal received from Portable at Active UL input (After attenuation) -18dBm



Design & Testing TabsMax uplink signal to OUCMax accepted power at OUC sites -45 dBm ='Objectives vs. Measurements'!B3Host site receiver noise floor (estimated) -112 dBm =VLOOKUP(Header!B9,'OUC Assumptions'!B19:D28,3,FALSE)Target for received signal at host site 15 dB ='Objectives vs. Measurements'!B4OUC max noise contribution -127 dBm =B11-B12OUC site power(EiRP) 54 dBm ='Designer''s Settings'!B3Uplink RSSI from donor site at BDA input (account for: free space loss, donor antenna gain, uplink gain specified for the targetedd site in the "OUC Assumptions" tab -23 dBm ='Designer''s Settings'!B4BDA uplink path loss (calculated) 77 dB =B14-B15Max Permitted TPO from BDA per channel 32 dBm =B10+B16

Max noise transmit power from BDAapplies to quiescent amplifer as well as non keyed channels when single channel is keyed -50 dBm =B13+B16

BDA Equipment limitsMax input power of BDA (vendor) 10 -8 dBm ='Designer''s Settings'!B7OUC uplink simultaneous channels rating (single DAS antenna/DAS) 3 7.78 ='OUC Assumptions'!D13OUC safety factor to manufacturer's specs 10 6 dB ='OUC Assumptions'!D9Max BDA input power (per channel) -3 -21.78 dBm =B21-B22-B23

BDA input limits mobile radio portableMax power from OUC Portable/mobile unit 45 36 dBm ='OUC Assumptions'!D6Minimum cable and combiner loss from BDA to DAS antennas 14 14 dB ='Designer''s Settings'!B12Closest distance a subscriber can approach a DAS antenna 10 6 ft. ='Designer''s Settings'!B14

Calculated Free Space Loss between the subscriber and the DAS antenna 40 35.8 dB=ROUNDUP(20*LOG10(B29/3.28084)+20*LOG10(800)-27.55,1)

DAS Antenna gain 2 2 dBm ='Designer''s Settings'!B11Pathloss from subscriber to BDA uplink input (calculated) 52 47.8 dB =B28-B31+B30Max calculated BDA input uplink power (before attenuation) -7 -11.8 dBm =B27-B32External padding req at UL input to prevent BDA damage 0 0 dB =MAX(B33-$B24,0)Additional padding (above damage padding) required at UL input to ensure BDA operational (may be digital padding) 15 9.98 dB =MAX(B33-$C24-B34,0)

BDA uplink output limitsMAX composit TPO BDA is capable of (clip level) 27 dBm ='Designer''s Settings'!B9Single DAS antenna multi channel rating 3 dB ='OUC Assumptions'!D13OUC safety factor 6 dB ='OUC Assumptions'!D10Max uplink derated for multi channel and ouc safety 18 dBm =B38-B39-B40Max power BDA can produce as configured (ignoring AGC) 73 dBm =MAX(B33,C33)-B52-B53+B43Configured BDA uplink gain 95 dB ='Designer''s Settings'!F8BDA uplink max AGC 60 dB ='Designer''s Settings'!F9Max uplink transmitted power permitted to input and transmit 18 dBm =MIN(B17,B41)Max power BDA should produce as configured 27 dBm =(MIN(B38,B42))Max BDA input to stay below amplifier clip limit -17 dBm =B41-B43+B44Gain reduction needed to stay below OUC host site receiver limit 0 dB =MAX((B46-B17),0)Max input for protection and output clip -22 dBm =MIN(B24:C24,B47)


Design & Testing tabs show how calculations are performed At the design

stage with estimates

At the testing stages with actual measurements


Isolation



Monitoring

Building responsible for IP connectivity & licensing Capability to remotely access and shut down BDA

through an OpenVPN secured connection



System Monitoring-Alarms

Normal AC Power Loss of Normal AC Power Battery Charger Failure Low Battery capacity (to 70 percent depletion) Active RF emitting device malfunction System component malfunction Donor antenna malfunction (VSWR)



Installation

Compliant to NFPA 72 BDA and DAS Headend in NEMA-4 enclosures Red enclosures with following signage (yellow

letters)


District of Columbia Fire Department Radio

Contact OUC Radio Engineering

(202) 373-3700

In-Building Wireless ProgramOutlineBackgroundBackgroundExamples of Negative Impact of BDAs On DC Radio Network Inbuilding Systems: What are they?Slide Number 7Frequent BDA/DAS Technical IssuesOther Issues EncounteredProcessPreliminary CommentsSlide Number 12OUC Transmission Authorization ProcessStep 1-Project InitiationVendor Fills In The FormOUC Provides Site Code Step 2: Design ValidationDesign Checklist-HeaderDesign ChecklistStep 3: System AcceptanceAcceptance Testing Pre-Requisites 1/3Acceptance Testing Pre-requisites 2/3Acceptance Testing Pre-requisites 3/3Pre-Requisites-HeaderPre-requisites ChecklistAcceptance Testing CheckList-HeaderAcceptance Check ListAcceptance Testing-Remotes CheckAcceptance Testing Coverage BaselineFire Marshall ValidationTransmission AuthorizationContact InfoContinuous OperationsContinuous Operations AuthorizationContinuous Operations Testing ProcessTechnical RequirementsFrequenciesOUC P25 SitesEquipmentPerformance Requirements-CoverageInterferenceLink Budget - HeaderOUC P25 SitesDesigner SettingsObjectives vs. MeasurementsDesign & Testing TabsIsolationMonitoringSystem Monitoring-AlarmsInstallation

Documents

In-Building Wireless Program - ouc.dc.gov · Inbuilding Systems: What are they? ... IP connectivity solution description Pdf/Word. GOVERNMENT OF THE DISTRICT OF COLUMBIA. PUBLIC SAFETY