Software Defined Networks (SDN) and Cloud Computing in 5G Wireless Technologies

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Dr. Masoud Olfat, director of RAN Technology & Global Standards, focused on "Software Defined Networks (SDN) and Cloud Computing in 5G Wireless Technologies" during the spirit conference 2014.

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Software Defined Networks (SDN) and Cloud Computing in 5G Wireless Technologies

  1. 1. Software Defined Networks (SDN) and Cloud Computing in 5G Wireless Technologies MASOUD OLFAT, PHD
  2. 2. 2 Disclaimer » This presentation provides my personal views, and does not necessarily represent my company’s technology positions
  3. 3. 3 Outline 1. 4G Technologies 2. 5G Topics » What is SDN? » Role of SDN and Cloud in 5G technologies
  4. 4. 4 Internet has Become an Indispensible Part of Our Lives Broadband Service Is Now Viewed As A Necessity Not A Luxury “How do you expect the current economic conditions to impact your communications and entertainment spending habits in the next 12 months?” Switch to cheaper pay-TV service Cancel sports/movie channels Disconnect landline phone service Subscribe to a bundle (voice/broadband/TV) Disconnect pay-TV service Downgrade to slower broadband tier Cancel HDTV package Cancel DVR service Upgrade to faster broadband connection Disconnect broadband service 10% 9% 9% 6% 4% 4% 3% 3% 3% 2% Source: Jupiter Research Economic Downturn Online Consumer Survey
  5. 5. 5 Combination of Applications and Devices Result in Significantly Greater Data Consumption FuturePresentPast 30 MB/Mo. 1 GB/Mo. 15 GB/Mo.
  6. 6. 6 Mobile Broadband Data Traffic worldwide forecast ExaByte 1,000,000,000,000,000,000 PetaByte 1,000,000,000,000,000 TeraByte 1,000,000,000,000 GigaByte 1,000,000,000 MegaByte 1,000,000 KiloByte 1,000
  7. 7. 7 1G to 4G Technology Generation Requirements Comments 1G No official ITU requirements Analog Technology Deployed in 1980’s 2G No official ITU requirements. Digital Technology First Digital system, deployed in 1990’s. New services such as SMS, and low-rate data. Primary technologies include IS-95 CDMA and GSM 3G ITU’s IMT-2000 required 144Kbps mobile, 384bps pedestrian, and 2Mbps indoors Primary technologies include CDMA2000 1X/EV- DO, UMTS, HSDPA, WiMAX, and LTE Rel 8 are now official IMT-2000 technologies 4G ITU’s IMT-Advanced requirements include ability to operate in up to 40MHz radio channels and with very high spectral efficiency IEEE802.16m and LTE- Advanced were adopted as IMT-Advanced technologies
  8. 8. 8 Why 4G? 4G is needed to accommodate huge traffic growth Traffic rising / growth falling Compared to 2G and 3G, Mobile broadband is gaining momentum from widespread 3.5G deployments, flat rate tariffs, and availability of internet friendly mobiles.
  9. 9. 9 Network Architecture Evolution
  10. 10. 10 LTE Components
  11. 11. 11 Carrier Aggregation Component Carrier (CC) Band x Band y // (a) (b) (c)
  12. 12. 12 Heterogeneous Network & Carrier Aggregation.
  13. 13. 13 LTE Future Releases
  14. 14. 14 Small Cell Enhancement • Large Bandwidth Needed • Low Mobility • Rich Scattering • Low Multi-Path Delay Spread • Discontinuous Coverage • High Degree Of Isolation Between Cells Requirements • PHY • New transmission technology, e.g. NCT, dynamic TDD, 256QAM, New Multiple Access Mode • Denser Network: • HetNet, Multi-Type/Easy-to-deploy Nodes for Indoor/Hotspot, e.g. Pico & Femto. • Larger Bandwidth: • Expand to higher frequency bands for larger bandwidth • Higher Layer Aspects • Signaling And Procedure Optimizations, e.g. Access, Paging Procedure • Mobility Enchantement, e.g. LTE-Hi Node Detection • SON for LTE-Hi Features
  15. 15. 15 Inter-Cell CoMP
  16. 16. 16 Device to Device • LTE Direct • Proximity-based applications and services • low power, autonomous discovery of instances of applications and services running in close-by devices • Optimized direct communication • public safety • Network offloading
  17. 17. 17 5G Evolution
  18. 18. 18 5G Requirements » No local or standard body has been assigned to characterize 5G requirements. » Expectation: A disruptive change to the existing 4G technologies, with standardization anticipated to occur between 2016 and 2018, followed by initial deployments around 2020. » 3G & 4G Requirements: demand for data services over the Internet. » 5G Requirements: » high capacity voice and data applications » support new emerging traffic types and data services » machine to-machine (M2M) communications for vertical market applications such as smart grid, smart homes and cities, and e-health. » Energy- efficiency and Green communications » Heterogeneous Networks
  19. 19. 19 5G Paths: Evolution & Revolution
  20. 20. The 5G Mission and Evolution • Security • Mobility/LTE • Domain Name Services • Hypervisor/Cloud ubiquity • Multi-tenancy, all-active • Identity access management • Traffic management • Optimization • Acceleration 1 2 3 Deliver the most secure, fast, and reliable applications to anyone anywhere at any time
  21. 21. 21 Three-Dimension Capacity Improvement Dimension Feasible Technologies Spectrum efficiency • Interference management and traffic adaptation (IMTA) • Multiple antennas (MIMO) / Massive MIMO / Smart antenna Spectrum extension • New Carrier Type (NCT) • Carrier aggregation (CA) • TV white space • Visible Light Communication (VLC) • Cognitive Radio (CR) Network configuration & optimization • Small cell deployment (relay / backhaul) • Efficient machine type communication (MTC) • Direct communication (D2D) • Self-organizing network (SON) • Heterogeneous network (HetNet) • Software-defined network (SDN)
  22. 22. 22 Some of Proposed 5G Features » Network Densification » Energy efficient networks; » Lowering transmission power and reducing the energy consumption per site » Cloud RAN; » Higher frequency spectrum, high bandwidth; » the need to deploy higher bandwidth, while increasing the number of antennas per site, though with reduced antenna sizes
  23. 23. 23 Some of Proposed 5G Features » Massive MIMO antenna technology; » Device centric communications » re-directing the traffic loads from central towers and backhaul » Machine to Machine (M2M) communications; » RAN sharing » Separation of Data and Control Paths » Software Define Networking » Spectrum Sharing
  24. 24. 24 Network Densification » Significantly increasing the number deployed base stations, while reducing the load and transmission power per site. » The use of heterogonous networks (HetNet) and the employment of small cell concepts; » Three Paths » spatial densification, » spectral aggregation, » backhaul densification       + +      =< NI S Log n W mCR 12
  25. 25. 25 Cloud RAN Full Centralization Partial Centralization Centralizing the base band units, and therefore lowering the structural loading per tower
  26. 26. 26 RAN Sharing Antenna A Antenna B Equipment Cabinet B Equipment Cabinet A Operato r Core A Operato r Core B Tower or mast Sharing MOCN Network Sharing in LTE
  27. 27. 27 Software Defined Network » In 2007 seminal research papers propose decoupling forwarding plane (physical infrastructure) and control plane » Routers no longer decide but only classify entering flow » Action decided by a remote central entity : “controller” » Flow: set of packets with same characteristics (among 12-tuple header’s field) » Communication between devices and controller via OpenFlow protocol
  28. 28. 28 Traditional Network of Switches & Routers Distributed algorithm running between neighbors complicated task-specific distributed algorithms
  29. 29. 29 Software Defined Network Control Program Network Operating System Global Network
  30. 30. 30 5G Network Intelligence » Network Intelligence with Cloud Computing » Network Intelligence for traffic offload » Network Intelligence for converged network management
  31. 31. 31 SDN for WiFi » WLAN has a limited throughput and are sensitive to congestion » Global performance is disappointing when the user is used to wired LAN » Multimedia content is tailored for Ethernet LANs » Solution at the signal level: MIMO » Solution at the packet level: duplicate the packet and send it through different paths » Requires a multi-interface terminal » Can work across technologies (e.g. Wi-Fi and LTE smartphone)
  32. 32. 32 SDN for WiFi – Cross Layer Optimization » Multimedia flows are sometimes composed of different types of frames » Example: MPEG flow » I-Frames: full images » P-Frames: “predicted” images (contains only differences from the previous image) » B-Frames: “bi-directionnal predicted” images (differences between the previous & the next images) » Loss or delay does not have the same effect on all types of frames » Where SDN can help » Transmit I-Frames on the best channel, P and B frames on the other » Adapt video quality to network conditions (filter detail frames, ...) © Copyright, Eogogics Inc, 2012 | (703) 281-3525 * www.eogogics.com
  33. 33. 33 Cloud RAN for WiFi © Copyright, Eogogics Inc, 2012 | (703) 281-3525 * www.eogogics.com
  34. 34. 34 Software Defined Networks For Wireless » What are software-defined networks (SDN): Common themes » Separate control and data plane » Open and programmable Controller » Vendor-agnostic (interoperable) hardware » Tailoring network Performance to applications » Self-Organizing (SoN) » Cloud Delivery » Data-driven » Dynamically optimized » Seamless network handoff
  35. 35. 35 Wireless SDN Architecture
  36. 36. 36 Wireless SDN Architecture
  37. 37. 37 LTE SON Procedure
  38. 38. 38 SDN for LTE: HetNet SON
  39. 39. 39 Summary » New Trends in the world of Communications: social networking, cloud computing and storing, video sharing, together with mobile computing » 30 fold increase in capacity plus additional services to enhance the user experience is required. » 5G: a disruptive change » increase the capacity, » support variety of services and applications, » meet the requirement of different device types. » SDN and Cloud is aimed to provide high efficiency in upcoming 5G networks
  40. 40. Masoud.olfat@gmail.com MASOUD OLFAT, PHD

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