Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Speed5G Workshop London presentation of the Speed5G project approach and achievements

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

  • Be the first to comment

  • Be the first to like this

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