Future tech trend for public safety proximity-based service


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Future tech trend for public safety proximity-based service

  1. 1. ProSe Public Safety 國際發展趨勢 (Future Tech Trend for Public Safety - Proximity-based Service) Institute for Information Industry Speaker: Yi-Hsueh Tsai 2013/10/08
  2. 2. Outlines 1. Introduction a) Use cases for Proximity-based Service b) Technical Challenges c) Tentative 3GPP roadmap and progress for ProSe 2. Standards for critical communications a) Critical communications for wide range of users b) Using commercial cellular for Public Safety c) 700 MHz Band for US Public Safety 3. Public Safety Requirements and Standards a) 3GPP public safety work items b) 3GPP public safety standards availability 4. Legacy coexistence and migration strategies BB system introduction and coexistence 5. Conclusion
  3. 3. Introduction WLAN D2D WAN + WLAN D2D D2D multicast (groupcast) D2D link Pico cell D2D link Pico cell WAN D2D Source: 3GPP & Intel
  4. 4. Use cases for Proximity-based Service Restricted discovery describes a basic scenario for ProSe discovery. Mary’s UE John’s UE Peter’s UE Proximity Open discovery describes a case in which an UE discover another UE without permission by the discoverable UE. Advertisement Interactive discovery
  5. 5. Public SafetyNon Public Safety Use cases for Proximity-based Service 星巴克咖啡[今日特價] 四人同行,一人免費! 今日星巴克咖啡四人同行, 一人免費,有誰要一起購 買? 我要1杯! 我要1杯! 我要2杯! Yes Sir! Group Report 請注意!2樓有多名受困及受傷 民眾,請加派人力支援! 個人災害 回報表單
  6. 6. Use cases for Proximity-based Service 3GPP D2D Initial Focus Within network coverage Outside network coverage Discovery Non public safety & public safety requirements Public safety only Direct Communication At least public safety requirements Public safety only eNBs LTE R12 GRRAN/UTRAN pre-R12 LTE In network coverage Out of network coverage Partial network coverage Communication type: – Unicast – Groupcast – Broadcast – UE relay Source: 3GPP & Qualcomm
  7. 7. Technical Challenges UE eNB Discovery of UEs Identification of a certain UE in its proximity in a battery efficient way Synchronization and measurement of channels from UEs Receive over UL resource (or transmit over DL resource) D2D Tx timing relative to UL/DL cellular channel Tx/Rx timing Maintenance of dual connectivity One link with eNB, the other with UE(s) Mitigation of in-band emission Group communication, relaying, security, privacy, etc. Control of D2D links Scheduling of individual D2D transmission and high-level control Coordination of interference Maximization of spatial reuse without causing serious interference Single or multiple-operator scenarios Charging, accounting, security, privacy, etc. WLAN incorporation Source: 3GPP & LG
  8. 8. Tentative 3GPP roadmap for ProSe Source: 3GPP & NEC 2013 2014 20152012 2016+ SA1 Feasibility Stage1 SA2/3 Feasib Stage2 SA/CT Stage3 RAN Feasibility RAN Stage3 Stage1 Stage2 RAN Stage3 SA/CT Stage3 ProSe work in RAN1 is too big to fit in current Rel12 timescales. RAN2 work partly depending on RAN1 progress CT work not well identified yet, need stable stage 2 first Release 12 Release 14 Release 13 Some requirements and features will most likely be delayed to Release 13. It is very unlikely that Release 12 will be extended.
  9. 9. 3GPP progress for ProSe • The work follows the usual 3GPP path: – First, a « Study Item » delivers « Technical Report », delivering a feasibility assessment and collecting proposed solutions – Second, a « Work Item » delivers « Technical Specs » Work Item Completion Status SA1 part (Use cases & Requirements) – TR phase 100% Completed SA1 part (Use cases & Requirements) – TS phase 100% Completed SA2 part (System Design) – TR phase 35% Ongoing SA2 part (System Design) – TS phase 0% Ongoing SA3 part (Security) – TR phase 10% Ongoing Overall RAN 25% Ongoing RAN1 part (Air Interface Physical Layer) 30% Ongoing RAN2 part (Air Interface protocols) 10% Ongoing RAN4 part (Radio Performance) 0% Ongoing
  10. 10. Standards for critical communications • Standards used for commercial cellular and critical communications have historically been separate • New interest today in adapting LTE for critical communication and public safety applications • 3GPP is working in collaboration with the critical communication industry to deliver standards Public Warning System (EMTEL & 3GPP) Digital Mobile Radio (ERM TG DMR) Non-voice Communication (3GPP & EMTEL) Maritime Distress and Safety System (ERM TG26) TETRA (TETRA)Priority use of public network (3GPP) Satellite emergency communication (SES SatEC) eCall (ESG & 3GPP) Mobile broadband system (MESA & RRS WG4) Enhanced caller location (E2NA, EMTEL, MSG, BRAN & CABLE) Public Safety Source: ETSI
  11. 11. Critical communications for wide range of users An open standard where the focus is on meeting the critical communications needs of public safety and security agencies and an increasingly wide range of other market sectors. Government Oil & Gas Transport & logistics Utilities Commercial & Industrial Manufacturing
  12. 12. Commitment and 3GPP Cooperation National Public Safety Telecommunications Council Spectrum and US$7bn funding for LTE-based national US public safety network at 700MHz Started standards process in 3GPP Tetra + Critical Communications Association Committed to LTE for broadband critical communication systems Requirements & Technical Input LTE Enhancements • Preserve strengths of LTE while also adding features needed for public safety • Maximize the technical commonality between commercial and public safety aspects Cellular Industry Source: 3GPP SA Chair
  13. 13. Using commercial cellular for Public Safety LTE provides numerous benefits that make it attractive for partnerships between jurisdictions, and between public and private organizations. Experts predict there will be more partnerships as more public safety agencies begin moving forward with deployments. Financial benefits as shown in right figure, it is dramatically more cost-effective to build a network as part of a public- private partnership rather than on a standalone basis. Source: Bell Labs -10%
  14. 14. Using commercial cellular for Public Safety In the US, it is expected that FirstNet will select an Internet Packet Exchange (IPX) provider to handle the connectivity between the NPSBN and the various commercial networks with whom NPBSN creates roaming agreements. When roaming onto commercial networks, it may be desirable to route certain traffic locally in the commercial LTE network. Source: NPSTC NPBSN Commercial LTE
  15. 15. 700 MHz Band for US Public Safety • 700 MHz D Block to be reallocated to public safety • FCC will facilitate transition of public safety broadband spectrum to FirstNet A Multiple Licensees B AT&T (most of US) C AT&T (most of US) D AT&T (acquired from Qualcomm) E Multiple Licensees A Multiple Licensees B AT&T (most of US) C AT&T (most of US) 698 704 710 716 722 728 734 740 746 Ch 52 Ch 53 Ch 54 Ch 55 Ch 56 Ch 57 Ch 58 Ch 59 Ch 60 Ch 61 Ch 62 Ch 63 Ch 64 Ch 65 Ch 66 Ch 67 Ch 68 Ch 69 DTV A Block Guard Band (Access Spectrum, Pegasus, etc.) B Block Guard Band (Vacant) C Verizon 746 768 798 806769 775757 776758 799787 PSBB PSNB C Verizon PSBB PSNB 805788 800 MHz FirstNet License Lower 700 MHz Band Upper 700 MHz Band Source: FCC
  16. 16. First Responder Network Authority • The ‘Middle Class Tax Relief and Job Creation Act of 2012’ directs First Responder Network Authority (FirstNet), a new entity within NTIA, to establish a single nationwide, interoperable public safety broadband network. • First Responder Interoperability Board will develop recommended technical requirements to ensure nationwide interoperability, based on the LTE standard. http://www.ntia.doc.gov/category/firstnet Source: FirstNet
  17. 17. Public Safety Requirements and Standards Public safety imposes unique requirements that cannot all be satisfied with LTE standards that are available today. An example of such a requirement is Mission Critical Voice, which includes Push to Talk (PTT), off-network operation, and a variety of related functions. • As LTE standards continue to evolve, and organizations such as FirstNet participate in the 3GPP standards processes to drive desired capabilities, more of the public safety requirements can be satisfied with products based on these standards. e.g. certain priority & QoS feature e.g. eMBMS e.g. mission critical voice Source: NPSTC
  18. 18. 3GPP public safety work items Work Item 3GPP Release Work Item Document Study on Resilient E-UTRAN Operation for Public Safety (FS_REOPS) 13 SP-130240 Proximity-based Services Specification (ProSe) 12 SP-130030 RP-122009 Group Communication System Enablers for LTE (GCSE_LTE) 12 SP-130326 Public Safety Broadband High Power User Equipment for Band 14 for Region 2 11 RP-120362 Source: 3GPP
  19. 19. Proximity-based Services Allow devices in close proximity to communicate directly 1. Reduce network load 2. Increase capacity in given bandwidth 3. Allow communication in areas without network coverage Network Cell Site Current LTE Communication Path Network Cell Site Direct Discovery & Communication Locally Routed UE Relay Cell Site Network Assisted Discovery
  20. 20. Key Components for Public Safety (B) Direct 1:many E-UTRA Communication out of coverage (D) Direct 1:many E-UTRA Communication in E-UTRAN coverage – NPSBN Users may be outside of the range of the fixed network, such as first responders in a rural area assisting in a response to a plane crash or police officers inside a residence responding to a domestic issue. – Off-network voice communications must be immediately accessible to users in the absence of the NPSBN. (H) UE to NW Relay (I) Service Continuity (F) ProSe-assisted WLAN Direct (ext1) RAN support (ext2) SA3 specification (D) Direct 1:many E-UTRA Comm., in coverage (C) Direct 1:1 E-UTRA Comm., in coverage (E) ProSe Comm Path via eNB (A) Direct 1:1 E-UTRA Comm., out of coverage (B) Direct 1:many E-UTRA Comm., out of coverage (G) UE to UE Relay (H) UE to NW Relay – We use this often to extend vehicle- based coverage footprint to handheld devices, e.g., to guarantee availability when responding to life-critical incidents within a building. – Also key to public safety, we would like this to be included in R12 if a solution can be found that does not add too much complexity to the rest of the work. Source: 3GPP & UK Home Office & US DoC
  21. 21. Group Communication System Enablers • Enable efficient group communication 1. Dynamic groups with mobile users and dispatchers 2. Support for floor control (e.g. push to talk) 3. Large groups (perhaps up to 5000) 4. Low latency to add users, obtain channels • Group call application is separate from the 3GPP system enablers 1. Application layer: group management, floor control decisions, legacy interoperability 2. LTE layer: mobility, service continuity, radio efficiency 3. Joint: performance, service interaction Group Call application sever Cell Site Dispatcher Group Call Enabled LTE Network Group Members UE Relay G.C. Network Application 3GPP LTE Network Layers Network API G.C. Network Application 3GPP LTE Network Layers Network API
  22. 22. Essential core components for Release 12 (A) Group Management – Any aspects of this required to make core functionality work. (B) Group Communications (F) Service Continuity – Service will not be usable without this. (H) Resource Efficiency – Planned or unplanned major incidents may require group communications within a very large group in a small geographic area - requires good radio resource efficiency. (E) User Interaction – Some aspects only; related to performance, immediate updating of group membership, all members receiving transmissions at the same time. (A) Group Management (B) Group Comm (TX,RX) (H) Resource Efficiency (I) Roaming Scenarios (J) High Availability (C) Geographic Scope (ext2) RAN support (ext3) SA3 specification (ext1) SA2/ ProSe support (F) Service Continuity (G) UE to NW Relay (D) Floor Control (E) User Interaction ? (K) Inter- working (L) UE-AS Open Interface Source: 3GPP & UK Home Office & US DoC
  23. 23. Resilient E-UTRAN Operation Isolated E-UTRAN can be formed following: 1. An Outage event within the infrastructure network 2. Deployment of Mobile Command Posts (MCPs) • 1 or more eNB(s) • Transport connection between eNBs • Backhaul • Local EPC functions at eNB • Restoration of coverage for the group of eNBs • Security between UE and eNB • Security between eNBs • Offer similar services seen prior to • Outage event Isolated E-UTRAN Outage in the Infrastructure Network Mobile Command Post
  24. 24. Release 12 draft standards and schedule WG Document Title Date SA1 TR 22.803 Study on Proximity-based Services 2011/09~2013/01 SA1 TS 22.115 TS 22.278 Service aspects; Charging and billing Service requirements for the Evolved Packet System (EPS) 2012/12~2013/06 SA2 TR 23.703 Study on architecture enhancements to support Proximity Services 2012/12~2013/09 SA3 TR 33.8xy Study on security issues to support Proximity Services 2013/03~2014/03 RAN1 RAN2 TR 36.843 Feasibility Study on LTE Device to Device Proximity Services - Radio Aspects 2012/12~2014/03 SA1 TS 22.468 Group Communication System Enablers for LTE 2012/06~2013/12 SA2 TR 23.768 Study on architecture enhancements to support Group Communication System Enablers for LTE 2013/02~2013/09 WG Document Title Date SA1 TR 22.897 Study on Resilient E-UTRAN Operation for Public Safety 2013/07~2014/06 Release 13 draft standards and schedule 3GPP standards availability Source: 3GPP
  25. 25. Legacy coexistence and migration strategies • The legacy coexistence is for the LTE network to interwork with P25/TETRA voice and low data-rate services. This Source: Alcatel-Lucent & TCCA interworking enables interoperability and also provides the necessary migration path from P25/TETRA with an LTE overlay to a mission-critical LTE network running all mission critical services. TETRA, TETRAPOL, etc. PMR/LMR networks Non Mission Critical data (commercial LTE) Mission Critical Data (Private LTE) Mission Critical Voice (Private LTE) Single sign-on services (security) Communications services - including PMR/LMR applications Subscriber & group management, group calls, etc. Cloud - based Applications including Control Room Applications 1 2 3 4 TIME / STAGE Mission Critical voice services Until LTE readiness & maturity Upgrade Learn Build Migrate Strategic: requires spectrum for private LTE Using commercial 3G/4G carriers
  26. 26. BB system introduction and coexistence Source: Cassidian More advanced configurations are also considered such as the presence of Narrowband (NB) signals in the bandwidth of Broadband (BB) signal. In this case, it is necessary to excise the BB spectrum, on the channels where NB signals are present in order to limit the interferences from BB to NB systems. In practice, this would mean to shut down the LTE Resource blocks (RBs) on which NB signals are present. Such configuration could increase importantly the spectrum efficiency of PMR systems mixing NB and BB.
  27. 27. Conclusions • Use cases for Proximity-based Service – Public Safety vs Non Public Safety – Communication type: Unicast, Groupcast, Broadcast, UE relay • 3GPP has started work on public safety standards – The Public Safety eco-system has pushed for standardization of their requirements to start in 3GPP – Meet market needs in an interoperable manner – Technical participation in Release 12 is needed • LTE based public safety networks – Use common off the shelf technology – Improve on existing capabilities with broadband and multimedia • Legacy coexistence and migration strategies – BB system introduction and coexistence
  28. 28. Reference 1. D2D standardization status in 3GPP (http://www.ict-ras.eu/index.php/meetings) 2. Evolution of 3GPP LTE-Advanced Standard toward 5G (http://www.netmanias.com/bbs/view.php?id=cshareforum_mobile&no=364) 3. http://www.3gpp.org/Public-Safety 4. http://www.3gpp.org/Public-Safety-LTE-gains-momentum 5. Public safety LTE: A How-to Guide (http://criticalcommunicationsworld.com/wp-content/uploads/tetra11/14691- Alcatel-Lucent_How-to-guide_LTE-for-Public-Safety_Global_edition_EN.pdf) 6. http://gcn.com/Articles/2013/04/08/Why-LTE-is-the-next-generation-in- wireless.aspx?Page=2 7. http://www.radioresourcemag.com/onlyonline.cfm?OnlyOnlineID=400 8. http://www.3gpp.org/TCCA-Joins-3GPP-for-critical-work
  29. 29. Q&A