Proximity communication


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Proximity communication

  1. 1. 標準現況:Proximity Communication 財團法人資訊工業策進會 羅耿介 研究員 1
  2. 2. Outline • Introduction • U C Use Cases – Commercial – Public Safety • Architecture – LTE Direct – LTE + WLAN • Standardization – – – – 3GPP IEEE Wi-Fi Alli Wi Fi Alliance WiGig • Conclusions 2
  3. 3. Beyond 4G無線網路技術演進新方向 3
  4. 4. Why D2D? 3G AMC+HARQ 4G & Beyond OFDM+MIMO CDMA Source: Intel 4 4 OFDM+MIMO Heterogeneous CoMP/eICIC Networks Spectral Efficiency 2G Network Efficiency Wireless Technology is at a turning point
  5. 5. D2D design approaches WAN top-down approach: Expanding heterogeneous cellular network to include D2D capability (E.g. 3GPP LTE D2D) WLAN bottom-up approach: Expanding and integrating existing standalone D2D solutions (E.g. WiFi Direct, Bluetooth, NFC) 5
  6. 6. Types of D2D Stand-alone and Self-organizing Network Assisted or Network Controlled Network Integrated and Heterogeneous Network WLAN D2D WAN + WLAN D2D WAN D2D (E.g. WiFi Direct, Bluetooth, NFC) , ) (E.g. LTE + WiFi Direct) (E.g. 3GPP LTE D2D) Source: Intel 6
  7. 7. D2D technology components Applications Innovations Device/User/Service Discovery & Communications Challenges Ch ll D2D Connectivity Co-existence Source: Intel 7
  8. 8. D2D Applications What do we have now? • • Share texts, photos, video Sh t t h t id clips • Ex. Color, Tooth Tag, Alljoyn Find shops • Ex. Fouresquare Radar, Twitter Discover Tab Tab, NearVerse LoKast, Google MAP Data 照片與檔案分 享、遊戲 Text Voice V i 網誌、即時訊 息 VoIP語音通訊 What will we have in the future? • • • • Enhanced social networking Enhanced mobile advertisement Home automation Public Safety Video 影片分享、線 上觀看 Source: IEK 8
  9. 9. D2D Applications Attributes • Evolution of LBS –P Proximity-based S i it b d Service (ProSe) i (P S ) – APP discovery and communication without GPS or centralized servers. servers • Timely Direct Enhanced User Experience Timely, Direct, 9
  10. 10. Use Cases - Restricted Discovery • Restricted discovery describes a basic scenario for ProSe discovery. Mary and John are friends Proximity P i it John’s ProSe-enabled UE Mary’s ProSe-enabled UE M ’ P S bl d Mary and Susan are not friends Susan’s ProSe-enabled UE 10
  11. 11. Use Case - Open Discovery • Open discovery describes a case in which an p y UE discover another UE without permission by the discoverable UE UE. Advertisement Interactive discovery Digital Signage 11
  12. 12. Use Case – Service Continuity • This use case depicts service continuity p y between the network infrastructure and the direct communication path path. Core Network Control + Data Core Network Control + Data Control Control Data 12
  13. 13. Use Case - Offloading • Offload much traffic load to the locally shared communication, such as wifi, femto, y even proximity based direct communication. • Interworking with unlicensed band provides operators a costless service. 13
  14. 14. Use Case – Public Safety • In the United States, LTE has been selected by the FCC as the technology for the Public Safety Network Network. • In Europe there is an ongoing discussion on spectrum to be chosen for broadband Public Safety held by CEPT ECC WG FM PT 49. • Mission Critical Voice is the priority p y – Device-to-Device calling • 3GPP RAN Rel-12 will study options for device-to-device communication and device discovery – Talk Group / Push-To-Talk Calling • 3GPP SA GCSEL will study options for group and PTT communication in Rel 1 Rel-1 14
  15. 15. Disaster Scenarios Ron Agam Getty Images 15
  16. 16. Fire and Rescue services • Firefighters communicate with each other g even under no network coverage, for example, network is unavailable after tsunami or wild tsunami, fire case. 16
  17. 17. Ambulance and EMS • At Life EMS Ambulance highly-trained medical g y teams use state-of-the-art communications with back-up systems, the latest life-saving back up systems latest, life saving pre-hospital care equipment, and fully-staffed ambulances that are mobile emergency rooms rooms. 17
  18. 18. Architecture (LTE Direct) ProSe Discovery over 3GPP ProSe Communication over 3GPP Access 1. NW Assisted Proximity  Discovery Information  UE1 3GPP Access ANDSF AAA EPC Non3GPP Access ccess 2. ProSe  2 ProSe Discovery 3. ProSe Communication (LTE) UE2 18 Control Plane Data Plane
  19. 19. Architecture (LTE + WLAN) ProSe Discovery over 3GPP ProSe Communication over Non 3GPP Access Non-3GPP 1. NW Assisted Proximity Discovery   1 NW Assisted Proximity Discovery UE1 3GPP Access ANDSF AAA EPC 2. ProSe  2 ProSe Discovery Non3GPP Access Control Plane UE2 3. ProSe Communication (I‐WLAN, trusted/un‐ trusted WLAN) 19 Data Plane
  20. 20. Standardization (3GPP SA1) • 3GPP – SA1 Proximity-based Service (ProSe) WID • First meeting in Nov. 2011 • Estimated completion in March 2013 • Objective : Study use cases and identify potential requirements for an operator network controlled discovery and communications between devices that are in proximity. The scope includes the following topics – – – – Commercial/social use Network offloading Public Safety Integration of current infrastructure services, to assure the consistency of the user experience including reachability and mobility aspects 20
  21. 21. Standardization (3GPP RAN) • Qualcomm solution 1. 1 LTE device to device discovery • Network-assisted discovery • Resource semi-statically allocated by the RAN & time synced time-synced • UEs transmit discovery signals within the discovery resources • Discovery signals encode information y g • UEs decode everyone else’s signals 2. LTE device to device direct communication • Separate feature from device to device discovery • Devices allowed to communicate directly if/when make sense • “Shortest path” for certain types of local data exchanges • Specific use case: public safety 21
  22. 22. Standardization (3GPP SA) • Intel solution – LTE WLAN interworking enhancements LTE-WLAN • Leverage unlicensed spectrum for traffic offloading – Opportunistic use of unlicensed spect u for D2D Oppo tu st c o u ce sed spectrum o communication • Leverage unlicensed spectrum to support new use cases – F th enhancements for diverse data applications Further h t f di d t li ti • Improve network efficiency and UE power efficiency – RAN improvements to handle different QoE requirements • Improvement on end-user experience, especially during network congestion • Targeted for mobile video which is projected to be the dominant mobile data traffic in the next few years 22
  23. 23. Standardization (3GPP SA) • Intel solution – Opportunistic Use of Unlicensed Spectrum for D2D Local Traffic D2D on LTE licensed spectrum (p (possible use cases: p public safety, y, offloading, social networking) D2D on unlicensed spectrum (possible use cases: offloading, social networking) 23
  24. 24. Standardization (IEEE 802) • IEEE 802.11 Infrastructure Service Discovery (ISD) Study Group – First meeting in Jan 2012 – Participants: RIM, Motorola Mobility, Huawei, Nokia, Renesas, InterDigital, ETRI, etc InterDigital ETRI etc. – Objective : Address the problem of how a station discovers the availability of services within the network from another station. • IEEE 802 15 8 Peer Aware Communication (PAC) Task 802.15.8 Group – First meeting in May 2012 – P ti i Participants: LGE, NICT I t Di it l ETRI Samsung, CUNY, etc. t LGE NICT, InterDigital, ETRI, S CUNY t – Objective : Defines the PHY and MAC specifications for PAC optimized for peer to peer and infrastructureless communications with fully distributed coordination coordination. 24
  25. 25. Standardization (Wi-Fi Alliance) • Wi-Fi Direct (Wi-Fi P2P) – – – – • Provides Peer-to-Peer connectivity technology y gy Includes Device Discovery, Service Discovery, Group Owner Power Saving, etc Enables use case: wireless display, wireless audio, sync and go, content sharing ... Program launched in Q g Q3-2010. Now, there are 1000+ product certified. According to ABI, , p g , every device will have Wi-Fi Direct in 2014. Neighbor Awareness Networking – A new task group was formed in 2012 – Provide low power discovery for mobile device social networking and D2D discovery – Enables use cases: for example, Saturday marketing advertisement, social gaming, social dating, social meeting in conference, etc... g, g , – Technology focuses include: Low Power Discovery (mobile device), Long range (up to 500meters), and large scale (up to 1000 mobile devices). • Wi-Fi Direct Service – A new task group was formed in June 2012 – Ensure selected services interoperability: File Transfer, DLNA based Media Stream, and g Printing – Enable 3rd party application development 25
  26. 26. Standardization (WiGig) Source : WiGig 26
  27. 27. Conclusions (1/2) • Challenges for beyond 4G ProSe evolutions – – – – WLAN and LTE radio integrations integrations, low-power-always-on ProSe discovery, New Carrier Type (NCT) of LTE for direct communication, and non orthogonal non-orthogonal radio design for high performance ProSe • Public Safety would be the primary driving force for LTE D2D in Rel-12 • LTE + WiFi Direct suppo ts ProSe discovery a d co ect supports oSe d sco e y and communication t at o y u cat o that only requires adaptations at EPC (no RAN impact) to quickly enable ProSe via standardized 3GPP/WLAN interworking solution – Possible to be completed in Rel 12 Rel-12 • LTE D2D ProSe discovery and communications require fundamental adaptation of the LTE physical layer (PHY) and radio. It will take several years to complete the major change in PHY and radio in standard procedures, and another several years for products to be available in the market 27
  28. 28. Conclusions (2/2) • III and ITRI have been actively participating in D2D standard (ProSe) creation in 3GPP SA1 since 2012, and will follow up in RAN & SA for Rel-12 and Rel-13 (2013 – 2016) • III and ITRI are working on a joint project on LTE + WiFi Direct prototypes in 2013 covering network network, services and applications • We are soliciting participating from Taiwan user equipments and chipsets industry (LTE & WiFi) • W need to coordinate our efforts b We d di ff between government and industry to develop a leading position i D2D market i i in k
  29. 29. Thank You a ou 29