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P25 Completion Metrics. The Industry Consensus 7-November-2005. The 4 Dimensions of Completeness. Interfaces What are the specified objects? Content What’s specified? Scope What kind of systems can be built? Functionality What can they do?. Content. Interfaces. Architectural Scope. - PowerPoint PPT Presentation
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P25 Completion Metrics
The Industry Consensus7-November-2005
2
The 4 Dimensions of Completeness Interfaces
– What are the specified objects?
Content– What’s specified?
Scope– What kind of systems
can be built? Functionality
– What can they do?
Interfaces
Arc
hite
ctur
alSc
ope
Content
Function
ality
3
4 Dimensions: Interfaces The Eight Open Interfaces
– Common Air Interface (U)– 2 Data Interfaces (A,Ed)– Inter(RF)-SS Interface (G)– Console Interface (Ec)– Fixed Station Interface (Ef)– PSTN Interface (Et)– Network Management Interface (En)
Plus Important Functional Interfaces– OTAR (KMF to End-Unit)– Key-Fill (KFD to End-Unit)
Plus Other Interfaces that we may discover
“Internally” we know these are here,
Externally, we may choose to hide them to maintain a
consistent message
4
4 Dimensions: Content Overview of Services/Classification Messages (Vocabulary) Procedures Conformance Tests
Performance Recommendations Performance Measurement Methods Interoperability Tests
Information that specifies the interface.“Fully Specified”
Information that allows independent testing.“Certifiable”
5
Radiosw/Ext.
Consoles
ConsolesNMSKMFs
4 Dimensions: Architectural Scope
RFSS
System
FixedStationsRadios PSTN
GWsNMS
WACN
Systems
KMFs
FixedStations
PSTNGWs
RFSSs
Vender SpecificImplementation(Limited Interoperability)
WACNs Network of Networks
Wide Area:Inter-System,Independent Mgmt
Local Area Operation:Mixed Manufacturer,Unified Management
6
Radiosw/Ext.
Consoles
ConsolesNMSKMFs
4 Dimensions: Architectural Scope
RFSS
System
FixedStationsRadios PSTN
GWsNMS
WACN
Systems
KMFs
FixedStations
PSTNGWs
RFSSs
WACNs Network of Networks
Wide Area:Inter-System,Independent Mgmt
Local Area Operation:Mixed Manufacturer,Unified Management
Vender SpecificImplementation: (LimitedInteroperability)
Interoperable core functions,Interoperable Equipment to the degree that venders publish interfaces and
implement each others proprietary features,Interoperable Agencies to the degree that Agencies co-operate
Fully Interoperable Equipment,Interoperable Agencies through coordinated management
Fully Interoperable Equipment with wide area roaming and independent management.
Interoperable Agencies through coordinated management
7
4 Dimensions: Architectural Scope Vender Specific Implementation –
– Exists Today, Many venders can build a system that works and is fully functional with proprietary features
Local Area– Exists Partially Today (Radio Interoperability),
with Venders implementing each others features Wide Area
– Specification Incomplete, Extended Identifiers, Wide-Area OTAR, etc
Network of Networks– Not considered
8
4 Dimensions: Functionality Refers to what the system can do Changes as user requirements evolve
(over time) and are incorporated into the standards
We need to discuss naming (Rev, Release, Version, Slice)
We need to discuss what the names mean– Is “Thing1” the current TSB102 functionality, for
example?
9
The 4 Dimensions of Completeness
Interfaces
Arc
hite
ctur
alSc
ope
Function
alityLocal Area
Net of Nets
Certifiable
Content
SpecifiedCAI
ISSI etc.P25 is truly complete when all of the interfaces are “certifiable” for Network-of-network operations and the requirements stop changing!
But it’s “usefully” complete when the standards are accepted by industry, industry is building interoperable products, and users accept those products.
10
Observations This model for completeness,
while accurate, is probably too complex for public display.
P25 will and should continually evolve, and so will never be “totally done”.
We as a community need a way to demonstrate continual progress and useful waypoints.
11
Example Summary of Status Select TSB102A Functionality, Show Progress on Content for
Interfaces vs. Scope
8 Interfaces + OTAR Vender SpecificOperation
Local Area Operation(Intra-System)
Wide Area Operation
(Inter-System)Common Air I/F (U) Fully Specified by
VendersFully Specified less 1 feature Some Work Required
2 Data Interfaces (Ed,A) Fully Specified (2) Fully Specified (2) Fully Specified (2)Inter(RF)-SS I/F (G) N/A Voice Only, Work OngoingConsole I/F (Ec) N/A Overview Only, OngoingFixed Station I/F (Ef) N/A Conventional Voice Only,
OngoingN/A
PSTN I/F (Et) Fully Specified Some Work RequiredNetwork Mgmt (En) N/A Not Started Not StartedOTAR Full Specified, Nearly
CertifiableFull Specified, Nearly
CertifiableWork Required
Status 5/5 4/9 2/9
12
Showing Progress, Defining Waypoints, Next Steps
Develop Status Charts for Multiple Views
Choose one that is truthful, and reflects our progress in a good light
Focus on work that meets the real needs of the user community, and shows discernable progress towards filling in the chart