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W IRELESS INTELLIGENT NETWORK I MPLEMENTATION OF P RIORITY ACCESS SERVICE ( WIP )

W IRELESS INTELLIGENT NETWORK I MPLEMENTATION OF P RIORITY ACCESS SERVICE ( WIP ). Overview for TR-45.2.5 WIN Work Group. Carol-Lyn Taylor Office of the Manager National Communications System Manager, Wireless Priority Services 703-607-6187 taylor3c@ncs.gov. PURPOSE.

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W IRELESS INTELLIGENT NETWORK I MPLEMENTATION OF P RIORITY ACCESS SERVICE ( WIP )

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  1. WIRELESS INTELLIGENT NETWORK IMPLEMENTATION OF PRIORITY ACCESS SERVICE (WIP) Overview for TR-45.2.5 WIN Work Group Carol-Lyn Taylor Office of the Manager National Communications System Manager, Wireless Priority Services 703-607-6187 taylor3c@ncs.gov

  2. PURPOSE Wireless Intelligent Network Implementation of PAS (WIP) • To Outline Prospective OMNCS Plans for Acquiring Industry Support for WIP • To Provide an Overview of the WIP Standard Requirements Document and Example Approaches to WIP • To Offer Potential Commercial Applications of WIP Generic Functionality OMNCS Office of the Manager, National Communications System PAS Priority Access Service 2

  3. PRESENTATION OUTLINE • Review of Recent Results in TR-45 Subcommittees • Prospective Plans for Acquiring Industry Support for WIP Standard Development • WIP SRD Table-of-Contents Overview/Review • Basic SRD - WIP Stage 1 • Appendix D - Example Approaches to Providing WIP • Potential Commercial Applications of Generic WIP Functionality • Next Steps 3

  4. REVIEW OF RECENT RESULTS • SRD Presentation to TR-45.2/45.2.1 15 November2000(Wireless Intersystem Technology/Stage 1 Work Group) • TR-45.2 Added WIP to Its 2001 Work Candidates List • TR-45.2 Forwarded SRD to TR-45.2.5 for Review/Project Consideration • SRD Contribution/Overview/Update to TR-45 Plenary 29 November2000 (Public Mobile and PCS Standards Committee) • TR-45 Remanded SRD to TR-45.2 for Standard Development • TR-45 Forwarded SRD to TR-45.4 (Radio Switching) and Ad Hoc Authentication Group (AHAG) for Review/Comment • SRD Presentation to TR-45.2.56 December 2000(WIN Work Group) • TR-45.2.5 Recommended Getting Carrier Support and Identifying Possible Commercial Features/Functionality 4

  5. INDUSTRY SUPPORT FOR WIP STANDARD DEVELOPMENT • Initiative Underway with Two Major Carriers for PAS Socialization/Support • SOW to Two Major Carriers for Estimates to Implement a PAS Solution • In-House PAS Cost Estimate Developed for Three Investment Scenarios: • OMNCS Makes Investment • Industry Makes Investment - Recoups via PAS Initiation/Usage Fees • Shared Investment with Industry Investment Recoup via PAS Initiation/Usage Fees • NS/EP Mobile Services Engineering Planning Effort Under Consideration that Includes: • Significant Business Case/Technical Exchanges with Top Carriers/Vendors • Potential R&D/Feasibility Assessment/Demos of NS/EP SCP Approach to Minimizing Carrier Service Administration Requirements • No Firm Commitments Yet, But… • In the Meantime, Pending Results: • Propose to Continue to Promote/Present Details of WIP SRD at Selected TR-45 Committee/Subcommittee/Work Group Meetings • Consider WIP Project Assignment, with OMNCS Team to do Majority of Work/Writing, Incorporating Industry Feedback 5

  6. WIP STANDARD REQUIREMENTS DOCUMENT AND EXAMPLE APPROACHES TO PROVIDING WIP Overview for TR-45.2.5 WIN Working Group Max Puckett DynCorp Information Systems Wireless Engineering Manager GETS Integration Contract 703-818-5913 max.puckett@dyncorp.com 6

  7. MOBILE SWITCH ACCESS MANAGER PSN GETS GETS SWITCH GETS IC • Foreword: Brief Background of OMNCS Wireless Priority Access Efforts • Section 1: PAS Service Description + SRD Purpose, Scope and Organization • Section 2: Goals, Assumptions, Evolutionary Objectives and Standards Compatibility/Compliance for PAS to Meet NS/EP Needs • Section 3: (Normative)PAS Requirements and WIP Stage 1 Description (TIA-664 Format) • Appendix A: (Informative)PAS Authorization Process • Appendix B: (Informative)PAS Priority Levels and Qualifying Criteria • Appendix C: (Informative)PAS Uniform Operating Protocols • Appendix D: (Informative)Approaches to WIN Implementation of PAS (WIP) WIP SRD: Overview BASIC SRD: TABLE OF CONTENTS OMNCS Contribution to TR-45 29 Nov Overview/Copy to TR-45.2.5 6 Dec Highlights of Section 3 Today Highlights Today 7

  8. MOBILE SWITCH ACCESS MANAGER PSN GETS GETS SWITCH GETS IC WIP SRD: Overview SECTION 3: OUTLINE 3.1 Priority Access Service: Overview 3.2 WIN Implementation of PAS (WIP): Stage 1 Description 3.3 Applicability to Telecommunications Services 3.4 Normal Procedures with Successful Outcome 3.5 Normal Operation with Successful Outcome 3.6 Exception Procedures or Unsuccessful Outcome 3.7 Interaction with Other Wireless Features 3.8 Authentication and Privacy 3.9 Fraud Basic TIA-664 Format 8

  9. MOBILE SWITCH ACCESS MANAGER PSN GETS GETS SWITCH GETS IC WIP SRD: Overview SECTION 3.1 PRIORITY ACCESS SERVICE: OVERVIEW • Provides Means for Qualified and Authorized NS/EP Users to Obtain Priority Access to Available Radio Channels at Air Interface Origination and/or Termination in a Call Path Involving Wireless When Necessary to Initiate Emergency Calls • To Be Available to Authorized NS/EP Users At All Times in Equipped Wireless Markets Where Wireless Provider Has Chosen to Offer Such Service • Authorized Users to Activate Feature on a Per Call Basis • To Be Used During Situations When Wireless Network Congestion is Blocking Call Attempts • Does Not Preempt Calls in Progress • Five Priority Levels Reserved for NS/EP Users, and These Users Provided Access to Wireless Channels Before Any Other Wireless Callers Qualified Users of PAS are those NS/EP personnel who meet the criteria of and have been assigned one of the five PAS levels as described in the FCC Order Authorized Users of PAS are those NS/EP personnel who have been validated for PAS through NCS Processes 9

  10. MOBILE SWITCH ACCESS MANAGER PSN GETS GETS SWITCH GETS IC WIP SRD: Overview SECTION 3.2 WIP: STAGE 1 OVERVIEW • PAS Calls Encountering a No Radio (Voice) Available Condition in a Cell, At Origination and/or Termination, Are Queued and Processed for the Next Available Channel in the Cell - Managed via a Service Logic Program (SLP) in a WIN SCP • Queued Call(s) are Processed by the Originating and/or Terminating MSC, as Appropriate, Based on Instructions from a WIN SCP and Supporting Message Flow between the MSC and SCP • PAS Calling Party Authorization and Priority Level Determination at Call Origination are Made by a Check in a PAS Field (or Fields) in a Database Maintained in, Preferably, a WIN SCP, or a Home Location Register (HLR) or Other Appropriate Platform *WIPWireless Intelligent NetworkImplementation of Priority Access Service 10

  11. MOBILE SWITCH ACCESS MANAGER PSN GETS GETS SWITCH GETS IC Radio (Voice) Channel at Origination Radio (Voice) Channel NS/EP Call Traffic NS/EP User Signaling Queue at WIN SCP Q WIP SRD: Overview WIP: STAGE 1 OVERVIEW • At Call Origination: • If No Radio (Voice) Channel Available, • If NS/EP User Authorized (Preferably via WIN SCP or via HLR or Similar Platform), • If PAS Dialing Pattern Recognized, • Then Call Queued in SCP for Cell Serving the NS/EP User, • Call Processed for the Next Available Radio Channel in that Cell in Accordance with the NS/EP User’s Priority Level and Call Initiation Time, and • NS/EP Call Indicator(s) Set in Call Setup Signaling to Mark as NS/EP Call. WIN SCP STP ORIGINATING MSC Q *XXX + PIN or *XXX + Dialed Number or 3/6/10 Digits or Other X Switch/Mobility Manager  Cell Site 11

  12. MOBILE SWITCH ACCESS MANAGER PSN GETS GETS SWITCH GETS IC NS/EP Call Radio (Voice) Channel at Termination Radio (Voice) Channel Traffic Called Party Signaling Queue at WIN SCP Q WIP SRD: Overview WIP: STAGE 1 OVERVIEW • At Call Termination: • If No Radio (Voice) Channel Available, • If NS/EP Call Indicator Recognized in Incoming Call,(Indicator in SS7 Calling Party Category / ANSI-41 Signaling, etc.) • Then Call Queued in SCP for Cell Serving the Called Party, and • Processed For Next Available Radio Channel in That Cell. (PAS or HPC Indicator) Q Switch/Mobility Manager X WIN SCP STP Cell Site TERMINATING MSC 12

  13. MOBILE SWITCH ACCESS MANAGER PSN GETS GETS SWITCH GETS IC WIP SRD: Overview SECTION 3.3 APPLICABILITY TO TELECOMMUNICATIONS SERVICES • PAS is Applicable to Authorized NS/EP Voice Telecommunications Services that Require a Radio (Voice) Channel Assignment • WIP is Applicable to Services that Employ WIN Technologies • PAS and Its Implementation via WIN May Be Applicable in the Future to Other NS/EP Telecommunications Services (e.g., Data) 13

  14. MOBILE SWITCH ACCESS MANAGER PSN GETS GETS SWITCH GETS IC WIP SRD: Overview SECTION 3.4 NORMAL PROCEDURES WITH SUCCESSFUL OUTCOME Authorization De-authorization Registration De-registration Activation De-activation Invocation All Addressed in SRD 14

  15. MOBILE SWITCH ACCESS MANAGER PSN GETS GETS SWITCH GETS IC WIP SRD: Overview SECTION 3.5 NORMAL OPERATION WITH SUCCESSFUL OUTCOME At Origination (Situations Addressed) User Invokes and is Authorized for PAS - Radio (Voice) Channel Available - Radio (Voice) Channel Not Available - Call Queued - Radio (Voice) Channel Not Available - Queue Full at Originating Cell User’s PAS Priority Higher than One or More PAS Calls in SCP Queue for Cell • - User Moves to New Cell While Still in SCP Queue for Originating Cell • Radio (Voice) Channel Available in New Cell • Radio (Voice) Channel Not Available in New Cell - Call Queued Successful Outcome: NS/EP User Gets Access to Next Available Radio (Voice) Channel in Cell 15

  16. MOBILE SWITCH ACCESS MANAGER PSN GETS GETS SWITCH GETS IC WIP SRD: Overview SECTION 3.5 NORMAL OPERATION WITH SUCCESSFUL OUTCOME At Termination (Situations Addressed) NS/EP Call is Setup to Termination MSC: - Egress Radio (Voice) Channel Available - Egress Radio (Voice) Channel Not Available - Call Queued - Egress Radio (Voice) Channel Not Available - Queue Full at Terminating Cell Call’s Priority Higher than One or More PAS Calls in SCP Queue for Cell • - Called Party Moves to New Terminating Cell • PAS Calling Party (User) Still in SCP Queue for Called Party at Old Terminating Cell • Called Party Responds to Page (via WIP Approach) from New Terminating Cell • Radio (Voice) Channel Available in New Terminating Cell • Radio (Voice) Channel Not Available in New Terminating Cell - Call Queued Successful Outcome: NS/EP Call Gets Access to Next Available Egress Radio (Voice) Channel in Cell 16

  17. MOBILE SWITCH ACCESS MANAGER PSN GETS GETS SWITCH GETS IC WIP SRD: Overview SECTION 3.5 NORMAL OPERATION WITH SUCCESSFUL OUTCOME • Call Detail Record • PAS Invocation Attempts, and Reason for Cessation of any Request • Duration of PAS Requests • Call Legs (Origination and/or Termination) on Which PAS Used to Gain Access to Radio (Voice) Channel • Recording of other Appropriate Billing Information Assigned at the PAS Service • Invocation of PAS Considered Complete When: • Radio (Voice) Channel Assigned to Call (at Origination or Termination), or • Loss of Radio Contact or Roaming to Another CMRS Provider’s System (at Origination), or • Expiration of Maximum Allowed Time to Hold for the Next Available Radio (Voice) Channel (at Origination or Termination), or • Deletion of Queued PAS Request (When Queue Full and Request at Bottom of Queue) Due to Arrival of Higher Priority Request (at Origination or Termination). 17

  18. MOBILE SWITCH ACCESS MANAGER PSN GETS GETS SWITCH GETS IC Origination Termination WIP SRD: Overview SECTION 3.6 EXCEPTION PROCEDURES OR UNSUCCESSFUL OUTCOME At Origination and/or Termination (Situations Addressed) User Not Authorized for PAS Call Dropped User Makes Second PAS Request While Queued (Same Cell/New Cell) Exception - May or May Not be Dropped Exception - May or May Not be Dropped User Makes POTS Call While Queued (Same Cell/New Cell) User’s Mobile Times Out Before Queue Processes Call Call Dropped No WIN SCP Queue Capacity and Call Priority Too Low Call Dropped Call Dropped User or Called Party Mobile Does Not Respond to WIP Processing after Radio Channel becomes Available Call Dropped Call Dropped Maximum Time in Queue Exceeded Call Dropped Call Dropped 18

  19. MOBILE SWITCH ACCESS MANAGER PSN GETS GETS SWITCH GETS IC 3.6 Exceptions while Roaming As Technically and Economically Feasible, Roaming NS/EP Service Users Provided the Same Grade of PAS Provided to Local NS/EP Service Users 3.6 Exceptions during Intersystem Handoff PAS May Not Be Successful for an NS/EP User Moving Into a New Service Area With an Active PAS Request in Queue in The Losing Service Area 3.7 Interaction with Other Wireless Features All To Be Determined WIP SRD: Overview 19

  20. MOBILE SWITCH ACCESS MANAGER PSN GETS GETS SWITCH GETS IC WIP SRD: Appendix D Overview APPENDIX D: (Informative) Approaches to WIP Table of Contents • Overview • Glossary of Terms • D.1 Approaches to WIP • D.2 Proposed Enhancements to WIN • D.3 NS/EP Call Path Scenarios and PAS Dialing Plan Alternatives • D.4 WIN SCP Service Logic Program Capabilities • D.5 WIP Call Performance 20

  21. MOBILE SWITCH ACCESS MANAGER PSN GETS GETS SWITCH GETS IC WIP SRD: Appendix D Overview D.1 APPROACHES TO WIP • Two Approaches Addressed: • WIP Approach 1: Periodic Repeated Attempts Channel(s) Reserved in MSC for Cell At Origination: Repeated SCP-Triggered 2-Party Initiate Call Attempts At Termination: Repeated SCP-Triggered Request Radio Channel Attempts “N” Channels Reserved in MSC for Cell MSC Notifies SCP When Channel Available in Cell At Origination: MSC Notification Causes SCP 2-Party Initiate Call Attempt At Termination: MSC Notification Causes SCP Request Radio Channel Attempt • WIP Approach 2: MSC Channel Available Notification Other Approaches May be Possible However, Must Give NS/EP User a High Probability of Access to Next Available Radio Channel at Origination and/or Termination 21

  22. CM Service Request Msg Origination NS/EP User NRAQUERY [PIN or DN, MIN/ESN, NS/EP Call Indicator, Cell ID, Cause Code, Trigger Type, Detection Point, ...] nraquery [exit exception] c. Retry Timer Tr Started Tr RSVCHS [Yes, Cell ID,…..] rsvchs [ack] CONTCHAN [Abrev Alert,…..] contchan [ack] INITCALL [NS/EP Call Indicator, MIN, DN,…..] initcall [failure] INITCALL [NS/EP Call Indicator, MIN, DN,…..] Radio Channel Available and Assigned initcall [success] RSVCHS [No, Cell ID,…..] Origination_Denied Detection Point with No_Radio_Available Trigger rsvchs [ack] Call Setup (Collect DN if needed) Called Party MS BS MSC SCP WIP APPROACH 1: ORIGINATION CALL FLOW SCENARIO Summary of Actions a. NS/EP User Makes PAS Call - No Radio Channel Available in Cell Cell Congestion - No Radio Channel Available - Trigger Fires at DP b. User’s Call Queued by SCP for Congested Cell d. MSC Reserves Next Available Radio Channel on Cell e. Reservation Acknowledged - MS Returns to Null State Abbreviated Alert f. User Alerted of Call being Queued Channel Reservation on Cell by MSC g. User Alert Acknowledged - ack Paging Msg h. Timer Expires - 1st Retry - User MS Paged and Responds Page Response - No Radio Available in Cell i. Retry Timer Tr Restarted Tr Paging Msg j. Timer Expires - Nth Retry - Page Response User MS Paged and Responds Radio Available in Cell - Given to Next User in Queue Alerting Msg User Responds User Alerted and Responds k. SCP Notified of Success l. No More Calls in Queue for Cell - MSC Channel Reservation Removed m. Reservation Removal ack NS/EP User Makes PAS Call n. 22

  23. MOBILE SWITCH ACCESS MANAGER PSN GETS GETS SWITCH GETS IC Used in Both WIP Approaches At Origination and Termination At Origination and Termination At Termination At Origination At Origination and Termination At Origination WIP SRD: Appendix D Overview D.2 PROPOSED ENHANCEMENTS TO WIN • In WIN Basic Call State Model • New Origination_Denied Detection Point (DP) at Call Origination • Modification of T_Busy DP at Call Termination • New WIN Generic Capabilities • No Radio Available Trigger • Reserve Radio Channel • Request Radio Channel • Request Call Initiation • Calling Party Indicator • WIN Control Channel Messaging 23

  24. Called Party A Local Local D NS/EP Caller Called Party Called Party PBX E B Called Party Long Distance MSC C F NS/EP GETS Caller WIRELINE PSTN MSC D.3 NS/EP CALL PATH SCENARIOS AND PAS DIALING PLAN ALTERNATIVES 1 3 2 Possible NS/EP Call Paths Possible NS/EP Dialing Plans Mobile-to-Mobile Call A to 1 to B: Intra-MSC A to 1 to 2 to C: Inter-MSC A to 1 to 3 to 2 to C: MSC-to-MSC via Wireline PSTN *XXX + PIN *XXX + Dialed Number 3/6/10 Digits Combos/Others? Mobile-to-Land Call (Local) A to 1 to 3 to D: MSC-to-EO To Address Possible Call Paths, Need to Be Able to Transparently Trigger PAS and/or GETS (for Wireline Priority Treatment Features), as Needed/Appropriate, for NS/EP Caller Mobile-to-Land Call (Long Distance) A to 1 to 3 to E: MSC-to-Wireline PSTN Land-to-Mobile Call (GETS) F to 3 to 2 to C: Wireline PSTN-to-MSC 24

  25. MOBILE SWITCH ACCESS MANAGER PSN GETS GETS SWITCH GETS IC WIP SRD: Appendix D Overview NS/EP DIALING PLAN ALTERNATIVES Alternative 2 • NS/EP User Dials *XXX (or Other Special Digits String) Plus Destination Number: • *XXX (or Other Special Digits String) is Set as a Criteria on New No_Radio_Available Trigger • Service Logic Program in WIN SCP Validates the MIN/ESN (or Similar MS Identity Code) of User’s Mobile Set and Queues Call • When Call given Radio Channel, It’s Routed to Completion via User-Dialed Destination Number Provides NS/EP User Simpler Dialing, but Authorization Based on Validation of MS MIN/ESN, Reducing User's Flexibility to Use Any Available MS 25

  26. MOBILE SWITCH ACCESS MANAGER PSN GETS GETS SWITCH GETS IC WIP SRD: Appendix D Overview D.4 WIP SERVICE LOGIC PROGRAM CAPABILITIES • Performing PAS PIN Validation; or MIN/ESN Validation; or MIN/ESN Authorization Database Registration with Extraction done using Calls to Specific Numbers with PIN Validation; or Default Priority Assignment based on Prefix or Destination Number; etc. • Serving PAS Call Queue by Repeatedly Attempting to Acquire a Radio Channel for the First Call in Queue at Regular Intervals until Served (WIP Approach 1), or Initiating Call Service Based on MSC Notification of a Radio Channel becoming Available (WIP Approach 2). • Managing the Queues on a Per Cell Basis by PAS Priority Level by Time of Arrival. • Managing the Queues to give Priority to Calls Terminating to the Served MS over Calls Originating from the Served MS, or vice versa, or either by Priority. • Enhancing the Queue Management to Permit Updating the Cell Queues to Reflect NS/EP User or NS/EP Called Party Movement between Cells while the Call is in Queue as Reported by the MSC in Page Responses to the Page Requests Generated by the Two WIP Approaches. • In WIP Approach 1, which uses Repeated Attempts to try to Acquire a Radio Channel, Recognizing Duplicate NRAQUERY Messages for the Same Call and Ignoring the Second Request. • Recognizing a Different DN Request from the Same MS and Deleting the First Request from the Queue. 26

  27. MOBILE SWITCH ACCESS MANAGER PSN GETS GETS SWITCH GETS IC 1.00 0.90 Call Holding Time 144 secs Percent NS/EP Calls 1% Engineered Grade of Service .02 Repeated Attempts Interval 2 secs Maximum No. of Re-Attempts 30 0.80 0.70 0.60 0.50 0.40 0.30 0.20 0.10 0.00 1 2 3 4 5 6 7 8 9 10 10 ch POTS 0.020 0.222 0.418 0.545 0.628 0.686 0.729 0.762 0.787 0.808 50 ch POTS 0.020 0.397 0.592 0.692 0.753 0.794 0.823 0.845 0.862 0.876 10 ch PAS w Rsv+Init 0.000 0.008 0.013 0.015 0.016 0.017 0.018 0.019 0.019 0.020 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 50 ch PAS w Rsv+Init WIP SRD: Appendix D Overview D.5 WIP CALL PERFORMANCE Probability of Radio Channel Access Blocking (Pb) versus Overload Probability Radio Channel Access Blocking (Pb) - Grade of Service - 27 Overload (X times Engineered Load)

  28. POTENTIAL COMMERCIAL APPLICATIONS OF WIP GENERIC FUNCTIONALITY Overview for TR-45.2.5 WIN Working Group Dr. Pat McGregor Nyquetek, Inc. GETS Technical Director GETS Integration Contract 410-729-0480 Pat_McGregor@msn.com 28

  29. MOBILE SWITCH ACCESS MANAGER PSN GETS GETS SWITCH GETS IC New WIN Generic Capabilities • No Radio Available Trigger • Reserve Radio Channel • Request Radio Channel • Request Call Initiation • Calling Party Indicator • WIN Control Channel Messaging SCP + SLP WIN Messages MSC WIP SRD: Commercial Applications WIN GENERIC FUNCTIONALITY DEVELOPED TO SUPPORT WIP Overview Service Logic Provides PAS (and GETS) Application Functionality, e.g., Queue Priorities, Authentication, Dialing Plan, etc. - Enables OMNCS to Evolve Application Specifics SCP Service Control Point SLP Service Logic Program MSC Mobile Switching Center 29

  30. MOBILE SWITCH ACCESS MANAGER PSN GETS GETS SWITCH GETS IC WIP SRD: Commercial Applications POTENTIAL COMMERCIAL APPLICATIONS OF WIP GENERIC FUNCTIONALITY • WIN Generic Capabilities for PAS Can Also be Used to Support Commercial Applications, such as: • Commercial Priority Service (e.g., Doctors, Non-NS/EP Emergency Personnel) • “Call Back” Feature as in Landline Service • Scheduled Calling (e.g.,“Latchkey Child” ) • Persistent Retry • Alternate Data Capability Prompt when All Voice Channels Busy • PACA (Priority Access and Channel Assignment) 30

  31. RECOMMENDATION AND NEXT STEPS Overview for TR-45.2.5 WIN Working Group Carol-Lyn Taylor Office of the Manager National Communications System Manager, Wireless Priority Services 703-607-6187 taylor3c@ncs.gov 31

  32. RECOMMENDATION AND NEXT STEPS OMNCS Desires to Keep Standard Development Moving Recommendation • TR-45.2.5: Consider Requesting Project Assignment from TR-45.2 (Cancel if No Industry Support Acquired within Agreed/Set Period of Time) Next Step • OMNCS: • Continue to Solicit Industry Assistance, Support and Feedback • Provide Needed Support/Periodic Updates to TR-45.2.5, and Others, in WIP Standard Development 32

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