WELCOME! Summary seminar on LTE-Assisted WiFi Direct 22 nd August Dr. Jiří Hošek, Brno University of Technology

Transcription

1 WELCOME! Summary seminar on LTE-Assisted WiFi Direct 22 nd August 2014 Dr. Jiří Hošek, Brno University of Technology

2 Introduction Brno, Czech Republic Brno University of Technology Faculty of Electrical Engineering and Communication Department of Telecommunications Unique R&D fellowship INTEL Labs, US Tampere University of Technology (TUT), Finland Brno University of Technology (BUT), Czech Republic Agile, time-critical and industrially-oriented research 5G technologies and services Internet of everything Improved user experience

3 Agenda 3 14:00 14:10 Welcome, introduction, and agenda of the seminar 14:10 14:20 Network-assisted D2D technology: project overview and our mission 14:20 14:30 An update on Proximity Services (ProSe) in 3GPP standardization 14:30 14:40 Technical capabilities of a unique 3GPP LTE-A deployment in Brno 14:40 15:00 On technical implementation of the LTE- Assisted WiFi Direct trial 15:00 15:15 Showcasing network-assisted D2D technology: demonstration & questions 15:15 15:30 Practical benefits of LTE-assisted WiFi Direct and associated challenges 15:30 15:45 Novel D2D-based service & application opportunities and market enablers 15:45 16:00 19:00 Summary of the seminar, conclusions, and feedback Social event: dinner at Havana restaurant

4 Network-assisted D2D technology Project overview and our mission Dr. Sergey Andreev: W.I.N.T.E.R. Group, TUT

5 Network Assistance at a Glance Unprecedented operator and end user benefits by enabling a new generation of proximity services Automated, continuous, and efficient assistance with secure discovery of devices & services Improved device-to-device (D2D) connection establishment, battery efficiency, and service continuity Applications of proximate connectivity Local voice service (offloading calls between proximate users) Context-aware applications Multimedia content sharing Group multicast Public safety Gaming

6 Our Integrated Approach to Studying D2D Network is accurately modeled with our advanced SLS tool 3GPP LTE may assist its clients in content/service discovery as well as in connection establishment Client searches for the desired content/services Network tells it when a suitable peer is in proximity 6

7 Understanding D2D Performance Limits We investigate LTE-assisted WiFi D2D offloading System-level simulations and analysis Performance requirements and benefits Advanced network-assistance features 3GPP LTE-assisted WiFi-Direct demo Considerable quality of service improvement for mobile clients (e.g., session acceptance probability) Significant boost in cell throughput 7

8 Network-Assisted Offloading Architecture This 3GPP-compliant technology builds on our rigorous research, MWC-2014 demo, and is ratified in 3GPP LTE Release-12 Devices receive help from the network during device discovery and D2D connection establishment Secure D2D connectivity between stranger users! 8

9 The Mission of The Brno Trial We have completed a full-scale trial to understand the practical benefits of assisted WiFi-Direct technology and discuss market opportunities that it offers Does LTE-Assisted WiFi Direct has the potential to offload licensed bands and enrich applications and services in current mobile ecosystem? In this seminar, we encourage partners to discuss the future opportunities offered by proximity-based services and to find the way to go forward! 1. S. Andreev, et al., Cellular Traffic Offloading onto Network-Assisted Device-to-Device Connections, IEEE Communications Magazine, April, S. Andreev, et al., Analyzing Assisted Offloading of Cellular User Sessions onto D2D Links in Unlicensed Bands, IEEE Journal on Selected Areas in Communications, September, A. Pyattaev, et al., Network-Assisted D2D Over WiFi Direct, in Smart Device to Smart Device Communication, Springer, A. Pyattaev, et al., Network-Assisted D2D Communications: Implementing a Technology Prototype for Cellular Traffic Offloading, IEEE WCNC, A. Pyattaev, et al., Proximity-Based Data Offloading via Network Assisted Device-to-Device Communications, IEEE VTC-Spring, A. Pyattaev, et al., 3GPP LTE Traffic Offloading onto WiFi Direct, IEEE WCNC,

10 LTE-Assisted WiFi Direct trial Experimental communication system at Brno University of Technology Assoc. Prof. Vít Novotný, BUT

11 History of System In 2008 Sensor, Information and Communication Systems (SIX) project was started at FEEC BUT (15 mil USD budget) the main goal was to equip laboratories for high level research the SIX Research Center was established in 2010, in 2012 the manager and the development plan of the Laboratory of Converged Network technologies was relooked and the idea of complex wireless communication system was proposed, enodeb S1-U X2 S1-MME enodeb S-GW S1-U S1-MME S5/S8 S11 MME S6a HSS/Auc Sh AS PDN-GW S2/SGi Cx Cx Internet S7 Rx Mm ISC PCRF/PDF Rx/Gq P-CSCF Mw Mw I-CSCF S-CSCF Mw change plan was worked out, application was passed and approved by MSMT of CR, tender was worked out three proposals offering two technologies (Huawei and Ericsson) were received Huawei solution was selected, system deployment began in August 2013, system is in the phase of almost full operation with a correction of minor problems

12 Mission The main objectives: Ownership of unique, latest and complex communication system unified mobile, wireless and fixed telecommunication network infrastructure that would enable: getting valuable experience from working with the latest technology, having full control of the system, learn how to troubleshoot problems in a complex telecommunication network. Research in the area of: design, testing and analysis of new communication protocols, design, testing and analysis of new communication services, communication system planning and performance optimization.

13 Mission cont. Establishment of cooperation with other research organizations and with industry new service and equipment testing in our experimental network, interfacing with other telecommunication systems and solutions, public network performance assessment KPI design, measurement and calculation, evaluation, public network diagnostics, troubleshooting and optimization, development of new telecommunication services, etc.

14 LTE LTE Overall architecture of LTE/WiFi EPC IMS experimental network at Brno University of Technology LTE/WiFi- -EPC-IMS (Huawei solution) LTE 2600 MHz 700 MHz 1800 MHz RRU RRU 700 MHz RRU RRU 700 MHz RRU BBU BBU BBU BBU VUT Brno LTE 700 MHz Separate address space RAN-IP1 Separate UE address space UE-IP3 Internet Separate address space WiFi-IP4 Home enb Access transport X2 network MME SeGW S/P-GW WiFi IP C Separate address space CN-IP2 Core transport network Public address space - VUT x.y Separate address space IMS-IP5 IMS (CSCFs + RCS) HSS O&M Router / VPN / NAT L3 Switch Application servers

15 LTE Cell Map

16 WiFi Cell Map

17 Complementary Equipment Rohde & Schwarz ROMES4 traffic analyzer + TMSW spectrum analyzer, EXFO Powerhawk Pro + TravelHawk + M5 protocol analyzer, User Plane Deep Packet Inspection, L2 - L7 load generators for performance & stress testing, Set of multi-technology and multi-band terminals smart phones, notebooks, tablets and USB sticks for all generations of mobile networks.

18 LTE/WiFi-EPC-IMS Technical capabilities of a unique 3GPP LTE-A deployment in Brno Assoc. Prof. Vít Novotný, BUT

19 Huawei Architecture O&M Service RCSe Server RCSe CTAS (MMTel AS/SCC AS/IP-SM-GW/EATF) ATS9900 IMS Core Provisioning GW SPG2800 ENUM /DNS ENS I/S- CSCF/MRFC/ECSCF CSC3300 MRFP MRP6600 IMS-HSS HSS9820 SBC (P-CSCF/A-SBC/I-SBC SE2600 EPC MME S/P-GW IP Network LTE enb enb LTE data-card + soft client LTE Handset (immature) PC Client SIP Phone

20 eutran Heterogeneous Radio Access Network: LTE Advanced (Release 10) cells 3x 700 MHz (Band 17 AT&T) 5 MHz FDD, 2x2 MIMO 1x 1800 MHz Outdoor coverage 1x 2600 MHz Indoor unit, 2x2 MIMO WiFi: 3 APs in 2.4 GHz and 5 GHz ISM bands enodeb BaseBand Unit

21 enodeb Remote Radio Units

22 Evolved Packet Core Unified Gateway (UGW) includes: PDN GW, Serving GW, MME, HSS, Fully redundant 10 Gbps links, Interface mirroring for probe based analysis.

23 IP Multimedia Subsystem Release 10, IMS core + RCS, 100k active users, Enables VoLTE, Public Safety Answering Point, O&M Provisioning GW SPG2800 Service IMS Core ENUM /DNS ENS RCSe Server RCSe CTAS (MMTel AS/SCC AS/IP-SM-GW/EATF) ATS9900 I/S- CSCF/MRFC/ECSCF CSC3300 MRFP MRP6600 Additional HSS, Full redundancy. IMS-HSS HSS9820 SBC (P-CSCF/A-SBC/I-SBC SE2600 EPC MME S/P-GW IP Network

24 Installation Process LTE/WiFi EPC IMS experimental network at Brno University of Technology

25 Technology Installation

26 Technology Installation cont. SGi internet interface, EXFO analyzer and test servers for network performance evaluation

27 Implementation details Network-assisted offloading to WiFi Direct Dr. Alexander Pyattaev, TUT Mikhail Gerasimenko, TUT

28 Introduction to Our 5G Vision True 5G vision: Optimal resource usage on all levels 1000x capacity Application and QoS-aware link planning Multi-RAT capabilities: Most suitable radio for each link Seamless integration of WLAN and cellular Multi-tier capabilities: Increased capacity of 3GPP networks Phantom cell concepts COMP, eicic.

29 HetNet: Current Status ANDSF function: UE decisions are always suboptimal TCP flow switching is very tricky Does not happen properly with mobile IP Usage of multiple paths is not supported Only works with multipath TCP UEs typically lack software Servers lack software Hard to enable multiple radios in UEs Phantom cells are still just a concept Femtocells are expected to just work Interference cancellation is very difficult

30 Flow Manipulation for RAN-Assisted 5G HetNets Do we need a circuit-switched network? Where each service/application uses its own personal circuit (flow) and each circuit is routed independently keeping the packet in order, and jitter low? Application-coordinated flow switching Context-based and location-based Working QoS support RAN-assisted flow control Simplified access through non-3gpp networks Dynamic switching in real-time

31 Flow Switching Architecture Example Open-Flow based layer 2.9 switching implements a working integrated cell One IP for both RATs Instant, network-controlled switching Load balancing between RATs Prototype created and tested in TUT on Sailfish platform The final prototype implies integration with real EPC and a real femtocell

32 D2D offload a Subcase of Flow Switching D2D is just like HetNet A flow from A to B via C is switched to A - B That sounds easy enough... In practice, D2D faces 3 challenges: Lack of application support (even for P2P) Aggressive firewalling in operator networks Lack of efficient discovery mechanisms Application-coordinated flow switching is necessary QoS support Smart RAT selection Same as for HetNets!

33 D2D Flow Switching in Plain IP Set up the D2D radio link e.g., over WiFi Direct Enable IP forwarding in the UE Make a virtual loopback interface (like in routers) Make the applications bind to that interface Add a route to the target virtual interface over WiFi This switches the flow between 2 devices to D2D link The Internet connectivity is unaffected Remove the route when D2D link is about to break This reverts connection to cellular

34 IP flow Switching Details

35 Deployment in Brno University of Technology

36 Aleksandr Ometov, TUT Konstantin Zhidanov, invited expert Practical benefits of LTE-assisted WiFi Direct and associated challenges

37 Lessons Learned: LTE positioning support OTDOA/AoA based IMS support Required to deploy the D2D server Reconfigured firewall between UEs For P2P communication over LTE Cooperative UE platform and application Operator Deployed package That could be an issue, especially for closed platforms; relatively easy on Linux-based phones

38 Faced Development Challenges Positioning Triangulation Cell-based Signal strength etc.. IPC data integration

39 Proposed Technologies Classification Implementation highlights: One-hop: Offloading onto unlicensed bands Spectrum reuse Multi-hop: Range extension Group multicast

40 Offloading onto Unlicensed Band Proximity based offloading: Low end-to-end delay Controlled switching Forced usage Local Voice Service Challenges: Positioning

41 Cell Range Extension Range extension: Relay Link through the trusted user Service continuity Challenges: Trust Privacy Incentive schemes ( friendly peers)

42 WiFi Direct Group Usage Local content redistribution Group multicast Faster content access and distribution Challenges: Sharing policies Key redistribution

43 Market and trends overview Novel D2D-based service & application opportunities and market enablers Olga Galinina, TUT Alexey Koren, invited expert

44 Agenda Mobile trends overview: insights into the market Proximity D2D services concept D2D services use cases and applications Further step: proximity D2D platform

45 Overall Mobile Market Global mobile market will continue to grow steadily in the next few years Source: INTERNET TRENDS 2014 CODE CONFERENCE. Mary Meeker, May 28, 2014, Kleiner Perkins Caufield & Byers (KPCB)

46 Location Based Services LBS Adoption 62% Heard of Berg Insight: mobile location platforms revenues will grow to 275 million worldwide in % Familiar 24% Used Source: Location Based Services Usage & Perceptions Survey. Cross-Tab Marketing Services &Telecommunications Research Group for Microsoft Corporation 6 in 10 are aware of LBS People who use LBS find them valuable Young people lead LBS adoption TechNavio s: Global Indoor LBS market to grow at a CAGR of 40% in 2016

47 Massive Content Generation Uploadable / Findable / Shareable / Real-Time Data Rising Rapidly Amount of global digital information created & shared from documents to pictures to tweets grew 9x in 5 years to nearly 2 zettabytes* per IDC. Source: INTERNET TRENDS 2014 CODE CONFERENCE. Mary Meeker, May 28, 2014, Kleiner Perkins Caufield & Byers (KPCB) 1 zettabyte = 1 trillion gigabytes Source: IDC report Extracting Value from Chaos 6/11

48 Changes in Content Distribution Patterns Source: Anjney Midha, KPCB Associate; Jared Morgenstern, KPCB Entrepreneur Partner

49 Mobile Advertisement Location-based advertisement (LBA) 2015: total revenues $6.2 billion 35% of total mobile advertising revenue Source: Pyramid Research

50 Re-imagining Conventional Mobile Services

51 Proximal D2D Services Paradigm Key feature supported by the next generation cellular networks Enables mobile devices to discover presence of others in proximity to communicate directly Offers new business opportunities for mobile stakeholders Direct connectivity (minimal network involvement ) Free of charge, fast and energy efficient transmission Ambient awareness ( wireless sense ) Local resource discovery (ad-hoc/network-assisted) Service continuity and automation Privacy (no 3 rd party involvement) Opportunities for highly relevant advertisement

52 SWOT Analysis WEAKNESSES Server side needed Integration on operators and mobile OS vendors side required Challenging security policies Although the market is small today, adoption will soon take off! THREATS Operators and mobile OS vendors may be slow to adopt integration Developers may have difficulty adopting the architecture Some people are concerned about disclosing their locations

53 D2D Services Use Cases and Applications (selected large markets)

54 D2D Use Case: Gaming Alice likes to play Japanese Mahjong but it takes 4 people for a game She marks herself as available for game and notification automatically appears when 3 more guys with the same status gather in proximity If the match is agreed upon ad-hoc network is set up for multiplayer game PriceWaterhouseCoopers: the global wireless games market reaches $14.4B by 2017

55 D2D Use Case: Social Services People who visit same places with you are more interesting persons to you as they share your lifestyle And you really do not want somebody to keep track of and analyze your dating activity log 11% of adult Americans ever tried digital dating (Pew Research Center)

56 D2D Use Case: Advertisement Art media content in shopping malls Music feed near jazz cafe Check in for 5 shops and get a free donut

57 D2D Use Case: Public Safety P2P communications (incl. outside network coverage) Automated D2D discovery helps to find people in danger and may be used to navigate to one s phone Multi-hop coverage extension helps rescue team to get coordination from base and transmit video from incident place

58 D2D Use Case: Serendipity as a Service Alice is fond of board games and her profile somehow knows about it When visiting Brno she is walking near the building where hidden local board game club is located Alice gets a notification and is able to jump in and have a very nice and unexpected evening Same with shops, people, and services

59 D2D Use Case: Everything You Can Imagine Delayed content download Secure content transmission Proximity-based I m feeling lucky

60 D2D Proximity Service Platform Important features: Provide ambient awareness Track proximity Push notifications Initiate connections Ad-hoc network coordination Further steps: Develop software and API architecture Make a demo in the testbed Make a pilot within the real network Formulate technology integration plan

61 Conclusion The wireless service industry is a competitive and fast moving D2D concept strengths clearly outweigh its weaknesses in several ways D2D properly deals with possible threats and expands to new opportunities Experience Perception Adoption