Improving Cell Capacity of 5G Systems Through Opportunistic Use of Unlicensed and Shared Spectrum

23,979 views
25,261 views

Published on

Presented by Kamran Etemad in LTE World Summit 2014 in Amsterdam on 25/06/2014

Published in: Technology, Business
0 Comments
3 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
23,979
On SlideShare
0
From Embeds
0
Number of Embeds
20,500
Actions
Shares
0
Downloads
150
Comments
0
Likes
3
Embeds 0
No embeds

No notes for slide

Improving Cell Capacity of 5G Systems Through Opportunistic Use of Unlicensed and Shared Spectrum

  1. 1. Kamran Etemad Ph.D. Senior Technology Advisor (FCC & UMCP) LTE/5G World Summit Amsterdam, 2014 Improving Cell Capacity of 5G Systems Through Opportunistic Use of Unlicensed and Shared Spectrum
  2. 2. Outline  Opportunistic Spectrum Access and Cooperative Communications  Shared Access and Unlicensed Spectrum  Use of LTE(U/D) and/or WiFi(Direct)  Design Options and Use Cases  Concluding Remarks 2K. Etemad LTE/5G World Summit, Amsterdam 2014 Note: The opinions expressed in this presentation are those of the author and do not necessarily represent the views of the Federal Communications Commission or the United States Government.
  3. 3. Key Areas of Opportunity 3 Opportunistic Shared Spectrum Access Multi-RAT Cooperative Communications Optimal Radio Access/Routing (Cost  QoS) N2D Unicast Direct D2D Local Group Multicast D2(m)D Broadcast (W)WAN (W)LAN PAN Access to Large Amount of Locally/Temporally Unused Spectrum K. Etemad LTE/5G World Summit, Amsterdam 2014
  4. 4. Spectrum Angle 4 “Traditional” Licensed Spectrum Unlicensed Spectrum Access Shared Spectrum Access Uncoordinated Shared Access with many unlicensed access technologies today and in the future! (Centrally) Coordinated Shared Access with Limited numbers of registered Users with “known” technologies. Sharing with federal and/or other commercial Users Exclusive use, Mostly Saturated Many Regional Band Classes Each with Limited Spectrum Propagation Suited for Macrocells K. Etemad LTE/5G World Summit, Amsterdam 2014
  5. 5. Realization of Dynamic Spectrum Sharing  The Spectrum Access System (SAS)  Takes dynamic inputs from incumbents and existing authorized users regarding their spectrum utilization.  Communicates with existing and potential users of 3.5 GHz Band about the availability of spectrum and certain operational parameters or their changes  Three Tiers of Access:  (1) Incumbent, (2) Priority Access License, (3) General Authorized Access Authorized “User” AU (PAL or GAA) Incumbent Users Spectrum Availability (Subbands/Time/Locations) and Interference Measurements  Capabilities and Configurations?  Operational/Configuration Limits  Interference Reports?  Remedies/Updated Limits Registration/Licensing Information Infrastructure Nodes (BS/APs) End User Equipment SAS Spectrum Database Spectrum Management Security Gateway (Federal SAS?) Regulator (FCC) 5K. Etemad LTE/5G World Summit, Amsterdam 2014
  6. 6. Key Enabler: Generalized Carrier Aggregation 6 Inter-eNB, Mix of FDD-TDD Non-Ideal Backhaul Single Technology Two Schedulers (Dual Connectivity) Inter-RAT CC2: WiFi, LTE-U, LTE-D, Others? Intra-eNB, FDD or TDD Fiber Connected Macro to PicoCells/RRHs Single Technology Single Scheduler CC1 CC2 R10-11 R12 R13? Booster Cell/Radio: • PicoCell, • RRH (Same Cell ID), • Relay Node? • WiFi AP? • WiFi RRH? Anchor Cell/RAT: • LTE 4G/5G Licensed • Wide Area Mobility • Control Plane Signaling K. Etemad LTE/5G World Summit, Amsterdam 2014
  7. 7. Multi-Radio Cooperative Communications  Distributed MAC,  Alternative 1: Loosely Coupled WiFi Offload • ANDSF/UE based control,  Alternative 2: LTE-U with Distributed MAC, Standalone LTE-U, e.g. LTE-D for D2D  Centralized RRC/MAC/Supplementary Carrier  Alternative 1: LTE-U  Alternative 2: WiFi • RAN Controlled WiFi Offload • LTE-WiFi Aggregation • LTE Controlled WiFi Direct PHY MAC RLC PCDP RRC PHY MAC Booster Connectivity Radio (LTE-U/WiFi) Anchor Network Access Radio (LTE) CNCN How tight of a coupling/integration? 7K. Etemad LTE/5G World Summit, Amsterdam 2014
  8. 8. Use Cases 8 CN HetNet/CRAN with PicoCell/RRH/Relay Integrated Small Cells WAN Assisted/Controlled D2(m)D Licensed Spectrum TX’s with LTE+ AS/NAS Control Signaling, Security/ Mobility Session Managements, etc. Unlicensed/Shared Spectrum TX’s WiFi (Direct) or LTE-U/LTE-D K. Etemad LTE/5G World Summit, Amsterdam 2014 WiFi Nodes may also support WiFi Only devices
  9. 9. Some Concluding Remarks  Evolution to 4G Wireless should  Make best of limited but all radios available in mobile devices  Make best use of locally and temporally available spectrum  Take a holistic approach to WWAN and WLAN Evolution; aiming to improve the operation of Multimode 5G (LTE/WiFi) Devices & WiFi Only Devices  There is a large amount spectrum (unlicensed or shared) at/below 5GHz which can be leveraged while or before moving to higher frequencies.  100’s of MHz Worldly available Spectrum, Many already supported on devices!  Small Cells/HetNet can enable and benefit greatly from Opportunistic Local Spectrum Access  Generalization of Carrier Aggregation to inter-eNB and Inter-RAT are early enablers  Realization of Dynamic Spectrum Sharing , e.g. SAS, is another key enabler 9K. Etemad LTE/5G World Summit, Amsterdam 2014
  10. 10. 10 Remember! The opinions expressed in this presentation are those of the author and do not necessarily represent the views of the Federal Communications Commission or the United States Government. Contact: ketemad@umd.edu K. Etemad LTE/5G World Summit, Amsterdam 2014

×