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Speed5G Workshop London presentation of the Speed5G project approach and achievements


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Presentation of the Speed5G projects approach and achievements at the Speed5G Workshop on March 7th 2018 in London

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Speed5G Workshop London presentation of the Speed5G project approach and achievements

  1. 1. 07-03-2018 Klaus Moessner (project coordinator) Overview of SPEED-5G
  2. 2. Outline 17 4 Project overview 4 Unlicensed spectrum and 3GPP 4 eDSA definition 4 MAC/RRM framework 4 Technical highlights SPEED-5G workshop, London, 07/03/2018
  3. 3. Project overview - what’s it about ? 18 New flexible MACs Radio resource management eDSA 4 Enhanced Dynamic Spectrum Access as an enabler for 5G KPIs of 100x connections, 1000x capacity and provision of QoS and QoE 4 eDSA is MAC + Radio Resource Management - the main project innovations 4 Actually there are two new MACs designed in the project with different characteristics 4 The Radio Resource Management is hierarchical with centralised and distributed parts SPEED-5G workshop, London, 07/03/2018
  4. 4. eDSA in a bit more context 19 4 cRRM: ➨ One per several hundred cells ➨ Spectrum portfolio and policy ➨ KPI policing and OSS interface ➨ Co-ordination across dRRMs 4 dRRM ➨ In every cell ➨ Allocates channels and resources to sessions 4 DCS-MAC (Dynamic Channel Selection) 4 FBMC-MAC (FBMC is a 5G variant of OFDM) SPEED-5G workshop, London, 07/03/2018
  5. 5. 20 eLWA features: Uplink support, enhanced mobility, optimizations for high data rate 802.11 technologies (802.11ax, 802.11ad and 802.11ay) eLAA features: Dual-connectivity, Support for cells w/o ideal-backhaul (non-collocated) NB. Only Rel. 15 related WI : “LAA/eLAA for the CBRS 3.5GHz band in the United States” Unlicensed Spectrum & 3GPP eLWA eLAA Rel. 15 ? “tight” integration/inter-working Rel. 14Rel. 13Rel. 12Rel. 11Rel. 10 LTE/WLAN interworking LTE over unlicensed Offload Aggregation WLAN Offload RAN-assisted interworking LWIP RAN-controlled interworking LWA LTE-U LTE-LAA SPEED-5G workshop, London, 07/03/2018 2010 20192016
  6. 6. eDSA Definition 21 4 eDSA is a combination of MAC and RRM 4 eDSA is abstracted in Speed-5G by ultra-densification through small cells, additional spectrum, and exploitation of resource across technology silos, 4 eDSA jointly manages several spectrum bands, cells, and technologies in order to offer increased capacity and improved QoE, 4 eDSA provides a framework for heterogeneous spectrum aggregation and inter-RAT load balancing (extended to unlicensed and lightly-licensed bands), in order to aggregate resources from different RATs and different licensing regimes SPEED-5G workshop, London, 07/03/2018
  7. 7. MAC/RRM Framework 22 4 The focus of SPEED-5G is developing a sustainable MAC/RRM framework, capable of supporting and accommodating current and future PHY/MAC/RRM designs and algorithms with multi-RAT support, for 5G and beyond 4 SPEED-5G has developed a 5G air-interface protocol stack supporting the eDSA concept 4 The joint MAC/RRM framework is extensible and future-proof 4 The MAC/RRM design supports system operation over technology-specific bands with non-contention based access, and technology-neutral bands with contention and non-contention based access 4 New interfaces defined to facilitate communications between MAC sub- layers and also between the MAC and cRRM 4 This framework has defined a harmonization point at MAC layer in order to integrate legacy RATs and new 5G air-interface variants and ensuring backwards compatibility with legacy RATs SPEED-5G workshop, London, 07/03/2018
  8. 8. 23 MAC/RRM Framework cRRM-based operation for increased efficiency in inter-cell coordination functions e.g. coordination of interference management, load balancing and Call Admission Control. SPEED-5G workshop, London, 07/03/2018
  9. 9. Technical achievements MAC framework 24 Advantages: 4 Offers “tight” interworking with “licensed, unlicensed and lightly-licensed” 4 No need for new bearer definitions (split / shared bearers as in LWA) 4 Aggregation/offload at “packet/RLC SDUs” granularity 4 Supports legacy dRRM approach as well as cRRM/dRRM hierarchical approach, for (cell) cluster-wide resource management 4 Takes advantage of ALL available spectrum resources in heterogeneous multi-RAT environments 4 Fall-back to LTE or WiFi only, if required 4 Corresponds to CU-DU split “option 5” 4 Flexibility to transmit control signalling over arbitrary air interface (not supported in LWA) 4 Faster adaptation to changing channel conditions (compared to LWA there is no loss of buffered data, which may in turn lead to significant fluctuations of TCP traffic). 4 Reuse of built-in RLC reordering (and no need for PDCP buffering/re-ordering which is required by LWA) But requires: 4 Support of split-MAC concept at both the eNB/gNB & UE 4 Need for ideal/near-ideal FH (in case of CU-DU split 5, in non-collocated scenarios): The timing requirement of signalling and data under functional splits intra MAC is strict. * R3-161813, "Transport requirement for CU&DU functional splits options", CMCC ++ R3-162102, " CU-DU split: Refinement for Annex A (Transport network and RAN internal functional split)", NTT DOCOMO, INC.
  10. 10. 4 Uses offload and aggregation, whereas legacy has one or the other 4 Switch layer is MAC, whereas legacy is layer 3 or PDCP 4 Offload granularity is packet whereas legacy is APN or bearer 25 Technical achievements MAC improvements over legacy
  11. 11. Technical achievements RRM framework 26 4 The cRRM layer integrates cell control, air-interface control plane and signalling (via interfaces identified) , thus providing inter-layer coordination for multiple cells 4 Novel RRM mechanisms/functions including for cooperative sensing, cross-carrier and cross-RAT scheduling have been explored in order to enhance and enable heterogeneous resource aggregation 4 Context-aware service-oriented RRM with dynamic allocation schemes for enabling eDSA concept, is supported SPEED-5G workshop, London, 07/03/2018
  12. 12. Technical achievements RRM framework implementation 27 4 Support of legacy & Speed-5G RRM algorithms, 4 Abstraction layer 4 Framework and algorithms are decoupled 4 Easy to create and test functionalities 4 Interfaces to external entities e.g. spectrum manager, OSS/OAM … SPEED-5G workshop, London, 07/03/2018
  13. 13. Technical achievements RRM algorithms 28SPEED-5G workshop, London, 07/03/2018
  14. 14. Technical achievements Backhaul 29 4 Increased throughput per BH link and capacity per area by ➨ Increasing channel bandwidth & aligned sector collocation 4 Reduced hop latency by ➨ Increasing modem speeds using advanced HW ➨ Frame-based latency reduction algorithm 4 Increased network availability by ➨ Failsafe attributes in CS (1:1) & TS (auto frequency scanning) 4 Balancing of resources by ➨ Automatic TS entry at provisioning SPEED-5G PtMP backhaul development board Backhaul 28GHz RF module SPEED-5G workshop, London, 07/03/2018
  15. 15. Technical achievements notable highlights 30 Evaluation results based on system-level simulations: 4 DCS-MAC & FBMC-MAC designs have been compared against each other as well as LTE and IEEE 802.11ac 4 The simulations scenarios consider different traffic models (full buffer and bursty traffic), ISD range (30 – 100m), as well as coexistence with WiFi systems. 4 Area Spectral Efficiency (b/s/Hz/km2): ➨ DCS-MAC provides ~ 500% higher ASE, compared to 802.11ac WiFi ➨ DCS-MAC provides ~ 40% higher ASE, compared to LTE (excl. CA and no MIMO) ➨ FBMC-MAC provides 2x higher ASE, compared to 802.11ac WiFi ➨ DCS-MAC results in 2x higher ASE, compared to FBMC-MAC (in DL) ➨ DCS provides better cell-edge throughputs, than in LTE ➨ even higher gains for DCS could be shown (against LTE), if LTE control channels had been modelled 4 Coexistence: ➨ When coexistence with other systems is considered, FBMC MAC provides better results, as the LBT feature induces a fair access with a system like WiFi, ➨ Equivalent mean occupancy time (in DCS and FBMC vs WiFi), but in dense deployments more WiFi APs can be blocked by DCS (up to 70%), due to lack of LBT (but this can be added to DCS) SPEED-5G workshop, London, 07/03/2018
  16. 16. Technical achievements 31 In summary 4 Design and validation of eDSA capable multi-RAT MAC/RRM framework, including specification of interfaces, primitives etc. 4 Design and validation 2 novel MAC protocols: ➨ System-level Simulations, Hardware-in-the-Loop tests, 4 Demonstration of capabilities via Proof-of-concepts (PoC) ➨ Multiple test-cases defined and evaluated per PoC 4 Multiple new RRM algorithms designed & evaluated 4 Advanced backhaul solution in support of eDSA, superior in terms of throughput, reliability and delay SPEED-5G workshop, London, 07/03/2018
  17. 17. Key project results 32 4 Increase in Area Spectral Efficiency (b/s/Hz/km2): ➨ DCS-MAC provides 5x higher than 802.11ac WiFi, and 40% higher than LTE R10 (excl. CA and no MIMO) ➨ FBMC-MAC provides 2x higher than 802.11ac WiFi 4 DCS-MAC has more gains but FBMC-MAC is better at co- existence ➨ FBMC MAC has LBT feature that enables fair access with WiFi, ➨ In dense deployments more WiFi APs can be blocked by DCS 4 Downstream routes are products, standards and publications ➨ Intracom have developed wideband point to multipoint wireless backhaul ➨ Contributions to CEPT PT1, 3GPP and IEEE ➨ Papers and magazine articles SPEED-5G workshop, London, 07/03/2018
  18. 18. 33 Thank you for your attention! SPEED-5G workshop, London, 07/03/2018 Acknowledgment: The research conducted by Speed-5G receives funding from the European Commission H2020 programme under Grant Agreement N : 671705. The European Commission has no responsibility for the content of this presentation. Find us at