5G: The Next Generation (Big Wave) of Wireless

Transcription

1 Ed Tiedemann Sr. VP, Engineering, Qualcomm Technologies Inc. 5G: The Next Generation (Big Wave) of Wireless 5G Tokyo Bay Summit 22 July 2015

2 Mobile has made a leap every ~10 years AMPS, NMT, TACS, JTACS D-AMPS, PDC, GSM, IS-95 (CDMA) WCDMA/HSPA+, CDMA2000/EV-DO LTE, LTE Advanced 2

3 new services new industries and devices Empowering new user experiences 3

4 Extreme variation of requirements Ultra-low energy Ultra-high reliability Ultra-low cost Deep coverage Wide area IOE Ultra- Reliable Services High security Robust mobility Ultra-high capacity Extreme broadband Enhanced Mobile Broadband Deep awareness Ultra-low latency 4

5 User-centric connectivity Device is not just an endpoint Multi-hop to extend coverage Device-to-device discovery and communications Integrated access and backhaul, relays 5

6 Integrated access & backhaul techniques reduce network deployment cost 2 2 Number of fiber drops needed Mbps 20 Mbps 30 Mbps 40 Mbps 50 Mbps UE datarate demand Integrated Access & BH 8 9 Fixed Access Backhaul Comparison of fixed allocation to backhaul versus dynamic allocation Minimized number of fibre drops Integrated access and backhaul techniques are more adaptive and less expensive Fewer fiber drop points needed compared to fixed backhaul for a given backhaul demand Higher trunking efficiency results in better user experience Dynamically adjusts to changes in fiber drop locations & number *Assumptions: 28 GHz band, 1GHz b/w, 18 base-stations; 200m ISD; 600 devices, uniform distribution 6

7 Unified 5G design across spectrum types and bands From narrowband to wideband, licensed & unlicensed, TDD & FDD Band Single component carrier channel Bandwidth examples Target Characteristics Range of application requirements Diverse spectrum types FDD/TDD <3 GHz 1, 5, 10, 20MHz Deep coverage, mobility, high spectral efficiency, High reliability, wide area IoE TDD 3GHz (e.g , ) 80, 160MHz Outdoor & indoor, mesh, Peak rates up to 10gbps 5G TDD 5GHz 160, 320MHz Unlicensed TDD mmwave 250, 500 MHz, 1, 2 GHz Indoor & outdoor small cell, access & backhaul 7

8 5G modulation and access techniques OFDM for enhanced mobile broadband access 5G broadband access requires the following Low latency Wide channel bandwidth and high data rate Low complexity per bit OFDM is well suited to meet these requirements due to the following characteristics Scalable symbol duration and subcarrier spacing Low complexity receiver for wide bandwidth Efficiently supports MIMO spatial multiplexing and multiuser SDMA OFDM implementations allow for additional transmit/receiver filtering based on link and adjacent channel requirements In addition, resource spread multiple access (RSMA) waveforms have advantages for uplink short data bursts such as low power IoE Supports asynchronous, non-orthogonal, contention based access Reduces IoE device power overhead 8

9 5G scalable numerology to meet varied deployment/application/complexity requirements Normal CP (e.g. outdoor picocell) Indoor Wideband (e.g. unlicensed) mmwave Sub-carrier spacing = 2N 80MHz Sub-carrier spacing = 8N 160MHz bandwidth Note: not drawn to scale Sub-carrier spacing = 16N Numerology Multiplexing ECP ECP FG ECP FG NCP NCP TTI k TTI k+1 TTI k+2 500MHz bandwidth 5G mmw synchronized to 5G sub6 at e.g. 125 us TTI level for common MAC, along with scaled subcarrier spacing, and timing alignment with 1 ms LTE subframes 9

10 5G extreme bandwidth: low round trip latency FDD TDD Data ACK ACK 0 HARQ RTT: 0.5 ms Data G P ACK ACK 1 ACK 0 Note: LTE UL/DL Cfg #1 with 7-instance HARQ using the D S U U D configuration has HARQ RTT > 10ms Order of magnitude lower HARQ RTT compared to LTE Low TTI HARQ latency Processing time similar to WiFi in TDD Self-contained TDD subframe Integrated approach to licensed M-MIMO, unlicensed, D2D Decoupling UL/DL data ratio from latency Extremely low application layer latency in both directions 10

11 Multi connectivity across bands & technologies 4G+5G multi-connectivity improves coverage and mobility Urban area 5G carrier aggregation with integrated MAC across sub-6ghz & above 6GHz Macro Small cell 4G & 5G small cell coverage multimode device Simultaneous connectivity across 5G, 4G and Wi-Fi 4G+5G Sub-urban area 4G+5G Rural area 4G & 5G macro coverage Leverage 4G investments to enable phased 5G rollout 11

12 Mesh connectivity improves IoE coverage Wide Area IoE with mesh IoE device with high pathloss relays data via nearby IoE devices with better pathloss Uplink Mesh Downlink Direct (UMDD) Enabled with common MAC & self-contained TDD sub-frames IOE Direct access on licensed FDD IOE IOE IOE Mesh on unlicensed or partitioned with uplink FDD IOE Time synchronization from WAN improves peer-to-peer protocol efficiency WAN licensed downlink provides greater range and protected reference signals 12

13 mmwave enables 5G Extreme Mobile Broadband Opportunities Availability of large bandwidth from 100s of MHz up to 9 GHz Extreme data-rates (e.g. up 10 Gbps) Dense spatial reuse can enable extreme network capacity Beamforming to overcome poorer propagation Flexible deployment with integrated backhaul (200m 500m) and access (100m- 150m) Challenges Higher path-loss at mmwave frequencies, susceptibility to blockage, building penetration issues Device cost and RF challenges at mmw Robust beam search & tracking System design with directional transmissions Solutions Tight integration with 5Gsub6 increases robustness Smart beam search & tracking algorithms Antenna management & reconstructive beam forming algorithms Coordinated scheduling for proximal user interference management Phase noise mitigation in RF components for cheaper devices 13

14 LOS NLOS Indoor Measurements: Modern Office Building Path Loss (2.9 and 29 GHz) Path loss characteristics in a dense multi-wall environment: LOS: 29 GHz better than 2.9 GHz NLOS: 29 GHz not significantly worse than 2.9 GHz Coverage looks promising 50m 70m Actual PL = [reference loss at 1m for a given frequency] + [normalized PL as shown] Angular Spread/Diversity (29 GHz) Elevation Numerous resolvable paths in elevation Suggests a 3-D channel model Azimuth Significant path diversity in azimuth Ability to withstand blockage events

15 5G Common MAC 5G enables tighter integration between 5Gsub6 and mmw mmwave and 5Gsub6 mmwave 5Gsub6 Improved mmw DL efficiency & reliability Accurate DL beam steering by providing fast & reliable CSI feedback through 5Gsub6 UL Increased sharing of mmw resources across devices 5Gsub6 carrier to bootstrap discovery Reduced temporal/frequency search, focus on spatial search Messaging to kick start directional search Reduced power consumption Wake-up & sleep commands through 5Gsub6 for efficient duty cycling of mmw radio Leveraging mmw & wider 5Gsub6 UL/DL New wider bandwidth of licensed 5Gsub6 carrier (e.g. 160 MHz) provides more balanced experience through mmw shadowing compared to narrower bands 15

16 Current 3GPP timeline delivers 5G specification by 2020 * Estimated 3GPP standardization timeline for 5G 5G timeline our view 3GPP Rel 13 Rel 14 Rel 15 Rel 16 Rel 17 & beyond SA SI RAN SI 5G RAN WG Study Items (SI) 3GPP RAN Workshop 5G Work Items 5G Work Items 5G evolution 5G full system 5G commercialization timeline 5G first deployments 5G 4G evolution - LTE will evolve in parallel with 5G * For information on 3GPP s 5G timeline, see: 16

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