3GPP ProSe/D2D and its proposed extensions to other topics...
Transcript of 3GPP ProSe/D2D and its proposed extensions to other topics...
3GPP ProSe/D2D and its proposed extensions to other
topics such as V2X, Wearable devices
RAN Aspects
ICL 蔡華龍 (Hua-Lung Tsai)
105年09月12日
Copyright 2012 ITRI 工業技術研究院
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Outline
Introduce LTE-A ProSe (D2D) in Rel. 12/13
Further Enhancements LTE Device to Device, UE to Network Relays
for IoT and Wearables in Rel.14
LTE-based V2X Services &V2V services based on LTE sidelink in
Rel. 13/14
Sidelink Communication in New Radio Access Technology
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Re1-13 WID Enhanced LTE Device to Device Proximity Services
New WI: Enhanced Device to Device ProSe (RP-142311)
Dec. 2014, RAN#66
RAN2 leads this working item (Qualcomm)
Objective:
Type 1 discovery for the partial and outside network coverage scenarios targeting public
safety use
Support the extension of network coverage using UE-to-Network Relays, including service
continuity (if needed), based on Release 12 D2D communication, considering applicability to
voice, video.
Enhance D2D discovery support in the presence of multiple carriers and PLMNs
Interference Issues
3
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韓國 D2D系統布建資訊
Korean government decided to use LTE technologies for Public Safety to build
nationwide Public Safety Broadband Network (PSBN) on July 2014. Based on the
Information Strategy Planning (ISP) of the Ministry of Public Safety and
Security (MPSS), Korea will initiate the establishment of trial Public Safety
Broadband Network (PSBN) in Pyeong-Chang City in 2015 which will host the
2018 Winter Olympic Games. This Public Safety Broadband Network (PSBN)
will be expanded to 8 other major cities in 2016 and finally deployed nationwide
by 2017
SAMSUNG disclose 2016 LTE products support Rel.12/13 LTE D2D
4
Source : 3GPP Contribution R1-152232
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D2D ProSe support three scenarios
5
Source : appear in IEEE Communications Magazine “Enhanced LTE Device-to-Device Proximity Services 2016
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Classification
PS Case In coverage Partial Out-Of-Coverage
Discovery R12
(Inter-cell, intra-cell)
R13
(inter-carrier, inter-PLMN
R13
(type1)
R13
(type1)
Communication R12
(Inter-cell, intra-cell)
R12 R12
R13
(UE-to-Network Relay, Group priority communications)
6
Non- PS Case In coverage Partial Out-Of-Coverage
Discovery R12
(Inter-cell, intra-cell)
R13
(inter-carrier , inter-PLMN)
X X
Communication X X X
Source : appear in IEEE Communications Magazine “Enhanced LTE Device-to-Device Proximity Services 2016
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Major Feature Of D2D ProSe
In Rel-12 & 13 Features Release 12 Release 13
Discovery Only supported in in-coverage Supported in-coverage, partial-coverage, and
out-of-coverage. UE-to-Network relay for
discovery is supported.
Purposes of discovery Public safety Public safety and non-public safety for in-
coverage,
public safety for partial-coverage and out-of-
coverage
Synchronization to facilitate discovery Achieved by eNBs Additional mechanisms are needed
Communications Broadcast (without feedback channels) for
in-coverage, partial-coverage,
and out-of-coverage
Broadcast with Layer 3 relay for partial-coverage
Synchronization to facilitate
Communications
Achieved by eNBs for in-coverage, ns
while additional mechanisms are needed
for partial-coverage and out-of-coverage
Reuse the mechanisms in Release 12
Priority Control Not yet supported Supported
7 Source :IEEE Communications Magazine “Enhanced LTE Device-to-Device Proximity Services
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Further Enhancements LTE Device to Device, UE to
Network Relays for Wearables
New SI: Enhanced Device to Device ProSe (RP-160677)
– March. 2016, RAN#71
– RAN2 leads this working item (Qualcomm , Huawei, Intel ,LG)
– Objective:
Enhancement of UE-to-Network relaying functionality for Wearable and IoT
Enhancements to enable reliable unicast PC5 link to at least support low power, low
rate and low complexity/cost devices. (IoT)
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Use Case to LTE Device to Device, UE to Network Relays for IoT
and Wearables
Source: Qualcomm RP-160268
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Architecture • R2-162529 On Scenarios and Objectives for Wearables and feD2D Ericsson
rUE: relay UE
wUE: wearable UE
Source: R2-162529
Schematic architecture showing the considered nodes and interfaces
Coverage scenarios
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PC5 based UE-to-Network Relay • R2-162741 Scenarios for FeD2D Qualcomm
PC5
Uu (Uplink and Downlink)Uu (Downlink)
Remote UE
Relay UE
Bidirectional relay Uni-directional relay
Advantage of D2D relay for Cat-M remote UE Advantage of D2D relay for NB-IOT remote UE
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Introduction V2X
• China shows great interest in vehicular communications
– In 2014, CCSA has finished the feasible study for vehicle safety application based
on TD-LTE
– The series of industrial standard of communication based on LTE for vehicle
application began
– In 2015, the frequency study of V2X also started
– National Regulatory Authority in China will allocate the frequency of connected
vehicles
• Vehicle manufacturers and cellular network operators also show strong interests in
vehicle wireless communications for proximity safety services as well as commercial
applications
• 3GPP’s goal is to realize “connected car” via LTE
12
*CCSA (China Communications Standards Association) 中國通信標準化協會
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V2X國際主流性評估
13
LTE-V2X activities in China
National key project “Standardization and prototyping for LTE-V wireless transmission technology (2016-2017)” was released by
MIIT
Shanghai Intelligent Connected Vehicle Pilot Area” was approved by MIIT, China . Initial plan was disclosed by Shanghai
International Automobile City
Phase 1 (present-2016.6): 40 connected vehicles (802.11p and LTE-V2X)
Phase 2 (2016.7-2017.12): 400 connected vehicles (802.11p and LTE-V2X)
Phase 3 (2018.1-2019.12): 1000 connected vehicles (LTE-V2X)
Major Companies Focus Topics Important Contributions @ RAN# 70
Huawei & L.G. V2V services based on LTE
sidelink
- Enhancement to sidelink physical layer structure necessary for V2V
- Enhancement to sidelink synchronization procedure necessary for V2V
- Necessary sidelink resource allocation enhancement option(s) for V2V
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Re1-13 SID
Feasibility Study on LTE-based V2X Services
New SI: Feasibility Study on LTE-based V2X Services (RP-151903)
June. 2015, RAN#68
RAN1 leads this working item (LG, Huawei, CATT)
Objective:
To define the evaluation methodology for LTE-based V2V, V2I and V2P
services to compare the performance of different technical options
For support of PC5 transport for V2V services (PC5 is specific for D2D )
For support of Uu transport for V2V, and Uu,PC5 transport for V2I and V2P
services
14
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Rel.14 WID
Support for V2V services based on LTE sidelink
New WI proposal: Support for V2V services based on LTE sidelink (RP-
152293)
Dec. 2015, RAN#70
RAN1 leads this working item (LG Electronics, Huawei, HiSilicon, CATT, CATR)
Objective (RAN2):
To identify what are necessary sidelink resource allocation enhancement option(s) among the ones
captured in TR 36.885 for V2V services and specify the identified option(s)
To specify a mechanism to enable E-UTRAN to select between PC5 and Uu for transport of V2V
messages within network coverage, if necessary, in coordination with other working groups
To specify necessary radio protocols and RRC signaling to support the above features
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Definition for V2X
Road Side Unit
an entity supporting V2I Service that can transmit to, and receive from a UE using
V2I application. RSU is implemented in an eNodeB or a stationary UE.
V2I Service (Vehicular-to-Infrastructure/Network)
a type of V2X Service, where one party is a UE and the other party is an RSU both
using V2I application.
V2P Service (Vehicular-to-Pedestrian)
a type of V2X Service, where both parties of the communication are UEs using
V2P application
V2V Service (Vehicular-to-Vehicular)
a type of V2X Service, where both parties of the communication are UEs using
V2V application
16
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Deployment
17
Source : CMCC & NTT DoCoMo
2GHz 6GHz
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V2X –Spectrum
PC5 transport uses a dedicated carrier
Uu transport and authorization/control for PC5 transport could use a licensed
carrier which is also used for LTE network coverage.
* SA: scheduling assignment
eNodeB
Uu
PC5
licensed spectrum
dedicated spectrumAuthorization/control
for PC5
Authorization/control
for PC5
PC5PC5
2GHz 6GHz
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V2X Synchronization scenario & procedure
GNSS/GNSS-
equivalent
GNSS GNSS
AFollowing eNB instruction
w/ intra-carrier cell coverage, w/ or
w/o GNSS coverage
w/o intra carrier cell coverage, w/
GNSS coverage
w/ inter-carrier cellular coverage or w/o
cellular coverage, w/o GNSS coverage
BGNSS/GNSS-Equivalent
C
eNB
eNB,hop1
eNB,hop2
eNB,hop3
In coverage,
GNSS,hop1
GNSS,hop2
GNSS,hop3
GNSS,hop2
GNSS,hop3
Out of coverage,
GNSS,hop1
Standalone
In coverage Out of coverage
w/ reliable
GNSS
w/o reliable
GNSS
Source : Samsung
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Enhance DMRS in high Doppler case – Maximum Doppler frequency is about 1.5kHz (for 6GHz carrier frequency and 280km/hr
vehicle speed)
– Maximum carrier frequency is about 6kHz (for 6GHz carrier frequency and 1ppm
mismatch, carrier spacing is 15kHz)
– Enhanced DMRS design Increase DMRS density
increase carrier spacing for DMRS
New DMRS pattern
AGC
GUARD
AGC
GUARD
Legacy DMRS location DMRS location with increased density
Each DMRS contains 6PRBs
144REs to 288REs
PAPR issue and Standard Impact
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PC5 enhancements for V2V
(Resource Allocation)
TDM
(Rel. 12 D2D)
FDM SA
pool data
pool
One periodicity
e.g. 40ms
SA data
One periodicity
e.g. 40ms
Hybrid TDM &FDM
Source : Huawei
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Enhancements to LTE D2D in Rel. 14
• D2D first introduced in Release 12
– D2D discovery for commercial & Public Safety use cases
– D2D group cast communication for Public Safety
• Enhancements to D2D continued in Release 13
– D2D discovery enhancements to inter-frequency
– D2D based UE to Network relays
• D2D based V2X being explored in Release 14
• D2D also has applications to IoT and wearables that need to be explored
22 Source : Qualcomm RP-160268
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New Radio Technology in Sidelink
New Radio Technology in Sidelink (Qualcomm)
eMBB
IoT &MTC
Source: R1-164709
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New Radio Technology in Sidelink (cont’d)
New Radio Technology in Sidelink (Qualcomm)
– NR side link design should support V2V, ProSe, Public safety as defined in LTE, plus additional mesh eMBB, mesh mMTC and mesh
URLLC services
– NR side link design should support unicast services.
– NR side link design should support ranging and positioning capability for new services, e.g., V2V and mission critical.
– Provide harmonized solution for DL, UL and SL in order provide forward compatibility for phase introduction of side link features.
– Suggest the group study SL in terms of: timing synchronization, discovery, node selection, traffic scheduling and mobility
management/paging procedures.
– NR side link design should support unlicensed services.
Source: R1-164709
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New Radio Technology in Sidelink (cont’d)
New Radio Technology in Sidelink (Huawei)
Support for UE-NW Relays
Group-based UE cooperation
• Network multicast phase
• UE cooperation phase
TUE
CUE1
CUE2
Access linksCooperation
link
TUE
UE CG
CUE
TRP
TUE
CUE1
CUE2Cooperation
link
TRP
(a) In-coverage TUE (b) Out-of-coverage TUE
Source :R1-164379
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New Radio Technology in Sidelink (cont’d)
New Radio Technology in Sidelink (Huawei)
Management/scheduling function for UE-NW relay
Source :R1-164379
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New Radio Technology in Sidelink (cont’d)
New Radio Technology in Sidelink (Huawei)
Unicast for sidelink operation
• Sidelink should be able to handle unicast transmissions at the PHY layer, and feedback
mechanisms (e.g., CSI, ACK/NAK feedback) should be supported on the sidelink.
Unlicensed sidelink operation
Licensed CC1Licensed CC1
unlicensed CC0
Licensed CC1Licensed CC1
unlicensed CC0
licensed CC0/CC2
Source :R1-164379
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New Radio Technology in Sidelink (cont’d)
New Radio Technology in Sidelink (Huawei)
Evolved D2D
• The sidelink (uplink) and the cellular link (downlink) using the same waveform
can also be easily spatially multiplexed just as what is done by MU-MIMO.
This will lead to higher spectral efficiency.
Source :R1-164047
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New Radio Technology in Sidelink (cont’d)
New Radio Technology in Sidelink (LG)
– eV2X by Sidelink
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