4.5g: everything over lte - ieee iccciccc2014.ieee-iccc.org/4. huawei 4.5g everything over lte...
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HUAWEI TECHNOLOGIES CO., LTD.
4.5G: Everything over LTE
Dr. Wan, Lei
2014-10-15
Standard Roadmap of LTE/LTE-Advanced Evolution
Page 3
Rel-10 Rel-11 Rel-12 Rel-13 Rel-14 Rel-15 Rel-16
3GPP
Req., Eval. Criteria
ITU Workshop
Proposal
WRC-12
WRC-15
WRC-18/19
Eval.
ITU-R
4.5G commercial
5G commercial
2016/17 2022
5G SI WIs
(ITU eval.) Corrections (deploy)
2010 2011 2012 2013 2014 2015 2016 2018 2019 2020 2021 2017 2022
LTE-Evolution (One potential path to 5G)
LTE New branding (4.5G)
LTE-Advanced (4G)
Target of 4.5G
• 4.5G targets the telecom market of 2017 and beyond, and provides potential market
expansion for operators, with the following aspects:
To efficiently address the continuous increasing data capacity demands in between 4G and 5G
To optimize end-user experience to achieve
Better connection quality, e.g. higher throughput everywhere and mobility experience
Less time-to-wait
Enabling Everything over LTE to get. more revenue sources for operators
New use cases and deployment scenarios
Flexible support to diverse OTT applications
Vertical market expansion (including massive connections)
Page 2
Technical Scope of 4.5G
Spectrum
Flexible Spectrum
Flexible band: Unlicensed, LSA
Flexible CA combination
Flexible Bandwidth
Flexible Duplex
Flexible Network
Flexible MIMO Usage
Flexible Topology
Flexible Network Convergence
Flexible Service
Unified MBB experience in flexible scenario
Flexible OTT support
Flexible Vertical Service Extension
Service
Network
Page 5
50X Cell Capacity, 20X Cell Edge Throughput, 2ms RTT, 50X Connection
Everything over LTE with Seamless video experience & Vertical service extension
Key Feature Set for 4.5G
Flexible Network
Flexible Service Extension
Flexibile Spectrum Utilization
U-LTE Flexible Bandwidth
Wideband LTE Flexible Duplex
Small Cell Enh. 3D MIMO
MTC
FDD/TDD CA
Positioning enh.
D2D/V2V Group Comm.
Latency Optimization
SOMA/NOMA
High Speed
Scenario Support
LTE-WLAN MSA
CP/UP split
MSA/Dual Connectivity
LTE-Hi (e.g.3.5GHz)
SRC
D2D/V2V
Flexible Spectrum Utilization
Macro eNB
LPN
Blue:FDD Green: TDD@UL
Massive CA
Spectrum
C-band(3.4GHz-
4.2GHz in EU)
Unlicensed LTE on 5GHz (600 MHz avail.)
case1
case2
case3
Wide band per carrier
Available for higher freq.
Wideband LTE with Massive CA
C band (3400-4200 MHz) allocation
Unlicensed LTE on 5GHz (600 MHz avail.)
Massive Carrier Aggregation
>100MHz
Page 9
Basic Physical layer support:
For self-scheduling, PDCCH design
can support >5 CCs
For cross-carrier scheduling, R10 CIF
field (3bits) can support Max 8 CCs
UCI design need be extended to
support more ACK/CQI feedback
New UE CAT
• Almost 400~800 MHz contiguous spectrum will be allocated to operators in EU /Japan/Korean before 2020 or even earlier. JP is already plan to start the allocation recently.
• Almost 200MHz contiguous spectrum will be allocated to operators in CN/ NA before 2020.
• Target subband (5725-5850, 5470-5725, 5150-5250Hz) has 100~245 MHz contiguous spectrum
• WiFi 11ac already support max 160M bandwidth
• Utilizing a large amount of carriers in licensed and unlicensed bands
• Support more than 5 carriers per UE
• Fast carrier selection and switching
• Backward compatible to R10-R12 CA (<= 5 carriers per UE)
• Wideband LTE with wider carrier bandwidth and CA as further evolution
Further optimizations
Control channel overhead reduction
Minimizing blind decoding
Batch processing on carrier
selection/onoff/measurement, etc.
RF requirements
Prioritize intra-band contiguous and
non-contiguous CA case
U-LTE: Scenarios
Mainly deployed in small cell scenario with limitation on the transmission power on unlicensed spectrum
Public Operator deployment
Scenarios: Deployed by Operators, Indoor/Outdoor, support capacity-boosting
Preferred Band: 5.8GHz/5.4GHz band, 5.1G is also possible for indoor
Residence Personal deployment
5150 5250 5350 5470 5725 5825 5850 5950
In Plan
Current
Maximum TX power:5470-5725MHz:1w;5725-5850: 4w –indoor and outdoor
Page 5
Licensed LTE U-LTE
Primary Carrier
Secondary Carrier
Licensed LTE U-LTE
Primary Carrier
Secondary Carrier
Non-Standalone
Operation with downlink only
Without Licensed LTE, U-
LTE will lose these
advantages
Standalone U-LTE is not
the focus
U-LTE: Focused on License-Assisted Access in Rel-13
As a secondary carrier, U-LTE is aggregated to LTE licensed Network
Controlled by Operator Network
Coverage & Capacity Guarantee
Mobility and service continuity
QoS Guarantee
Unified OAM, RRM,
Billing
Operation with DL/UL
Page 6
U-LTE: High-prioritized Band
*1 Bands allocated by China/US are 5725-5850MHz. *2 China 5725-5850MHz is shared license among operators, open for WAS and RLAN
Sub-bands 5150-5250MHz 5250-5350MHz 5470-5725MHz 5725-5825MHz
EIRP 23dBm/36dBm 23dBm 30dBm 33dBm/36dBm
US/Canada Indoor/Outdoor Indoor/Outdoor Indoor/Outdoor Indoor/Outdoor*1
EU Indoor Indoor/Outdoor Indoor/Outdoor NA
Korea Indoor Indoor/Outdoor Indoor/Outdoor Indoor/Outdoor
Japan Indoor Indoor Indoor/Outdoor NA
China Indoor Indoor NA Indoor/Outdoor*1,*2
Australia Indoor Indoor/Outdoor Indoor/Outdoor Indoor/Outdoor
India Indoor Indoor NA Indoor/Outdoor
• 5725~5850MHz, 5470~5725MHz and 5150-5250MHz (regional) are recommended
Large bandwidth(100MHz~150MHz), relatively lower interference than other sub-bands
No inter-modulation interference with most of LTE licensed bands
U-LTE & WiFi coexistence Case1: Carrier selection (no LBT)
• 3 carriers available for U-LTE deployment from
operator A (U-LTE) and operator B (WiFi) Baseline: no carrier selection (co-channel
deployment)
Random carrier selection: each U-LTE eNB/WiFi
AP selects one unlicensed carrier randomly
Channel-sensing based Carrier selection : each
LTE node selects one interference-less
unlicensed carrier
Observations U-LTE is more robust than WiFi in co-existence
scenario
Carrier selection can protect WiFi AP very well
~x5
~x 1.5
• LTE Pico performs much more robust in co-existence scenarios
• U-LTE Pico with muting some TTIs can be a more friendly neighbor to
WiFi, compared to coexistence with WiFi, even without assistance of
additional transmission restriction (e.g., LBT)
U-LTE & WiFi coexistence Case2: Co-channel
WIFI AP and LTE pico are close to each other
Operator A(U-LTE) Operator B(WiFi)
Operator A(U-LTE) Operator B(U-LTE)
U-LTE & WiFi Coexistence: Key mechanism
• Cell on/off and Carrier Selection
• Semi-static or dynamic
• Interference levels are detected by eNB channel measurement
during the off duration or UE-assisted measurement/report
• UEs will be redirected to other channels by Scell configuration/
activation/ deactivation
• Further enhancement by advanced features (to be
standardized) such as LBT or DFS
• Can be a common design on coexistence for all regions
• Prefer load-based equipment (LBE) mechanism
• First Proposal:
“The Unlicensed Spectrum Usage for Future IMT Technologies”,
Mr. Sun Lixin, in “The 6th International Workshop - Vision and Technology
Trends for 5G”, Korea, Sep. 2013
https://committee.tta.or.kr/main/standard_seminar_view.jsp?No=143
• First Proposals in 3GPP:
3 SID/WID proposals were proposed in TSG RAN #62, Dec., 2013
RP-131788 & RP-131635, RAN1 SI proposalon LTE-U, [Ericsson, Qualcomm ]
RP-131680 RAN4 WI proposal on 5.8GHz SDL in USA [Verizon]
RP-131918 & RP-131723, RAN SI proposal on U-LTE, [CMCC, Huawei, CATR, CATT]
• First LTE-U standard workshop in Paris, France, Jan. 2014
Hosted by Huawei, Ericsson, Qualcomm, China Mobile and Verizon
20 presentations, 60 participants, https://www.dropbox.com/sh/8xjlm6gcccgnuwd/QovKbhhX5T
Chronicle of U-LTE events
Flexible Network
Ahchoring
point for RRC
connection
Improve peak
throughput
Simplify mobility
due to no HO
Master eNB
Slave eNB
Pico
cell
LTE UMTS/CDMA
GSM/WiMAX
DAS
LTE-Hi AP iMicro
U-LTE/WiFi
iPico
SRC
Cloud-BB backhaul
Carrier 1
Carrier 2
cell average SE @ 16ports >90% @ 4ports; cell edge SE @16ports >50%
@4ports
SOMA/NOMA
• SOMA v.s. NOMA: Common part
› Power domain multi-user mapping to a single constellation
• SOMA v.s. NOMA: Difference
› SOMA maps the 2nd UE sub-constellation with gray mapping
to the quadrant
› Low Rx complexity is the key: SOMA
› NOMA requires CWIC, while SOMA does not rely on SIC
SOMA: Semi-Orthogonal Multi-Access without SIC
0.001
0.01
0.1
1
0
0.6
1.2
1.8
6.2
6.8
7.4 8
8.6
9.2
9.8
10.4 11
11.6
BLER performance of UE1, AWGN, 1x1
TM1, 5000tti, 10MHz, P1:P2=0.2:0.8, UE1
QPSK 1/2, UE2 QPSK 1/2
NOMA
NOMA(ideal-SIC)
PMDMA
NOMA(0.1:0.9)
PMDMA(0.1:0.9)
Single Cell
0.001
0.01
0.1
1
6 6.4 6.8 7.2 7.6 8 12.2 12.6 13 13.4 13.8 14.2 14.6 15 15.4 15.8
BLER performance of UE1, AWGN, 1x1 TM1, 5000tti,
10MHz, P1:P2=0.2168:0.7832, UE1 16QAM 1/2, UE2
QPSK 1/2
NOMA
NOMA(ideal-SIC)
PMDMA
Single Cell
SOMA
SOMA
SOMA
SOMA with ML is similar to NOMA with ideal CWIC
R12 Observations on NAICS: CWIC introduces large
additional complexity to perform codeword decoding and
re-encoding, introducing large latencies in Rx
Flexible Service Extension
Coverage:20dB better than LTE
Device battery life:8-10 years
E2E latency<150ms
Capacity = 3 X LTE
20 times denser Video UEs 2D positioning: Indoor 3-5m
3D positioning: Vertical 3m
SPC Platform
Cellular Network
GPS
VDC VDC
E2E latency< Tens of ms
Group Communication
Page 13
Push to Talk Top videos Mobile Advertising
Target use case
Users located within a geographical area have a
common interest on the service/content.
Multicast area is dynamic.
Multicast area may be a single cell.
User might not be evenly distributed over the
geographical area.
Group based scheduling
Multicast on a per cell basis (over PDSCH).
eNB assigns the common Group-RNTI to a group of users.
Benefit
Efficient delivery of the specific traffic according to the user
distribution
Radio resources could be flexibly shared between multicast
and unicast, even within the same subframe.
Narrow-Band MTC
180 KHz for DL and UL
Ultra-low terminal cost (< $5)
Very long terminal battery life (> 10 years)
Extended coverage (20 dB enhancement)
Massive connections support
Example Connections to EPC
PDN-GW LTE
GGSN SGSN
NB M2M
MME/S-GW
2
G BSC
2G
3G
3G
RNC
Page 16
NB
M2
M
Low-cost MTC
HUAWEI TECHNOLOGIES CO., LTD. Page 20
4.5G is coming, can 5G be far behind?
• Peak rate: - 150MHz@2rx UE - 300MHz@4rx UE • Latency: RTT 6~8ms;
Access 70ms
LTE evolution in 5G Rel-14&Rel-15
LTE new branding Rel-12 & Rel-13
LTE-Advanced (LTE-A)Rel-10 & Rel-11
LTE Rel-8 & Rel-9
Everything over LTE w. Seamless video experience & Vertical service extension
4G Certification, Coverage Enh.
Scalable Bandwidth (~20MHz), OFDMA
Intelligent Interaction of the world
• 50 x Capacity @LTE-A, 20x Cell edge throughput @LTE-A • UE density 20x @LTE-A • 50 x Connection • Latency: RTT 2~4ms; Access 50ms
• 1000 × Capacity & 1000 × Energy efficiency • UE density 300x@LTE • 100 × Connection • Peak rate > 10Gbps • Latency: 1ms
2020
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2005
• Avg. SE: DL4x2, 2.6bps/Hz, UL1x4, 2.0bps/Hz • Cell-edge SE: DL4x2: 0.09bps/Hz , UL1x4: 0.075bps/Hz • 10 × Peak rate @LTE: - 450Mbps@2rx UE, 3CC - 3Gbps@8rx UE, 5CC
Thank you !