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V2X Architecture Standardization in
3GPP
Ying-Yu Chen (ICL/V100)
4 Nov. 2016
Copyright 2009 ITRI 工業技術研究院 Copyright 2016 ITRI 工業技術研究院 工研院重要規劃資料,禁止複製、轉載、外流,請依規定保管使用。
Outline
Current status in R-14 V2X
Types of V2X applications & requirements
V2X architecture
PC5
MBMS
What’s next ? eV2X
2
Copyright 2009 ITRI 工業技術研究院 Copyright 2016 ITRI 工業技術研究院 工研院重要規劃資料,禁止複製、轉載、外流,請依規定保管使用。
Current status in R-14 V2X
3
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Current status of R-14 V2X
SA1
TR 22.885
TS 22.185
100%
SA2
TR 23.785
TS 23.285
99%
4
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Applications & requirements
5
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Types of V2X application support in 3GPP
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Tx UE
Communication
range
Message
broadcasting
Rx UE
Rx UE
Rx UE
Broadcast-based V2V communications
Types of V2X applications (V2V, V2P, V2N and V2I)
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Service Requirement
Latency/Reliability Requirements
Reliability
Message Size Requirements
Frequency Requirements
Range Requirements
Speed Requirements
7
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V2X architecture
8
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PC5
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PC5 and LTE-Uu based V2X architecture reference model
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E-UTRAN
UE A (Vehicle)
UE D(stationary)
V2X Application
LTE-Uu
LTE-Uu
V5
V1
V5
V3
PC5
PC5
PC5
V5
MME
HSS
S/P-GW
S1
S6a
V3
V4
V3
V2X Application
Server
V2X Control Function
V3
UE B (Vehicle)
UE C (pedestrian)
V2X Application
V2X Application
V2X Application
V2 SGi
Non-roaming reference architecture for PC5 and LTE-Uu based V2X communication
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Reference points
V1
Between the V2X application in the UE and in the V2X Application Server
V2
Between the V2X Application Server and the V2X Control Function in the operator's network
The V2X Application Server may connect to V2X Control Functions belonging to multiple PLMNs
V3
Between the UE and the V2X Control Function in UE's home PLMN
Based on the PC3 in TS 23.303 (ProSe)
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V2X Control Function
Used to provision the UEs with PLMN specific parameters that allow the UE to use V2X in this specific PLMN
Also used to provision the UE with parameters that are needed when the UE is "not served by E-UTRAN"
12
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PC5-U stack instance for V2X use
The Non-IP PDCP SDU contains a Non-IP Type header, which indicates the V2X message family used by the application layer, e.g. IEEE 1609 family's WSMP, ISO defined FNTP, etc
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UE A UE B PC5-U
IP, Non-IP
RLC
MAC
IP, Non-IP
RLC
MAC
PDCP PDCP
Application Application
PHY PHY
PC5-U stack instance for V2X use
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Authorization and provisioning for PC5
Authorization policy
When the UE is "served by E-UTRAN“
PLMNs
When the UE is "not served by E-UTRAN“
Radio parameters for when the UE is "not served by E-UTRAN“
Includes the radio parameters with Geographical Area(s)
Policy/parameters
The mapping of Destination Layer-2 ID(s) and the V2X services, e.g. PSID or ITS-AIDs of the V2X application
14
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V2X message transmission/reception over PC5
The V2X communication over PC5 reference point is connectionless
Both IP based and non-IP based V2X messages are supported
For IP based V2X messages, only IPv6 is used. IPv4 is not supported in this release
15
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Procedure for V2X communication over PC5
Reuse One-to-many ProSe Direct Communication transmission (TS 23.303)
A UE shall be configured with a set of Layer-2 ID corresponding to different type of services
Reuse one-to-many ProSe Direct Communication reception (TS 23.303)
16
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QoS for PC5
MME provides the UE-PC5-AMBR based on subscription information to the eNB as part of the UE context information
The application layer sets the PPPP (ProSe Per-Packet Priority) for each V2X message when passing it to lower layer for transmission
The mapping of application layer V2X message priority to PPPP is configuration on the UE
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MBMS
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MBMS for LTE-Uu based V2X architecture reference model
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UE E-UTRAN MBMS GW
MME
BM-SC
V2X Application Server
LTE-Uu M1
S1-MMEM3 Sm
SGmb
SGi-mb
V1
MB2-UMB2-C
Reference architecture for MBMS for LTE-Uu based V2X communication
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Authorization and provisioning for LTE-Uu
PLMNs in which the UE is authorized Corresponding USD for receiving MBMS based V2X traffic in
the PLMN
V2X Application Server address information List of FQDNs or IP addresses of the V2X Application Servers,
associated with served geographical area information and list of PLMNs that the configuration applies to
Optional configuration for V2X Application Sever discovery using MBMS List of PLMNs and corresponding USDs for receiving V2X
Application Server information via MBMS
20
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V2X Application Server discovery using MBMS
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UE
(any PLMN)Serving PLMN
1. Attach to
serving PLMN
2. Receive local
Service Info via
MBMS
DNS Server V2X Application
Server
Serving PLMN
3. Resolve local V2X Application Server address
4. Establish service connection with V2X Application Server
V2X Application Server discovery using broadcast
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MBMS service area mapping using MB2-C
MBMS service areas for V2X services may be configured at the V2X Application Server. Such service areas are not expected to change frequently
MBMS bearer activation/deactivation procedures specified in TS 23.468
If the UE provides its geographic location or Cell ID information over V1 reference point, the V2X Application Server may use such information for the determination of the target broadcast area
The V2X Application Server knows which TMGI/Flow-ID (i.e. MBMS session) is serving a geographical area
22
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QoS for LTE-Uu
The V2X messages can be delivered via Non-GBR bearer as well as GBR bearer
QCI values
QCI 3 and QCI 79 can be used for the unicast delivery of V2X messages
QCI 75 is only used for the delivery of V2X messages over MBMS bearers
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QCI Resource
Type
Priority
Level
Packet
Delay
Budget
(NOTE 13)
Packet
Error Loss
Rate
(NOTE 2)
Example Services
3
(NOTE 3),
NOTE 14
GBR
3 50 ms
(NOTE 1,
NOTE 11)
10-3 Real Time Gaming, V2X messages
75
(NOTE 14)
2.5 50 ms
(NOTE 1) 10-2 V2X messages
79
(NOTE 14)
Non-GBR
6.5 50 ms
(NOTE 1,
NOTE 10)
10-2 V2X messages
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MBMS bearer announce for V2X use
V2X USD
V2X Server USD
24
Information element Description
TMGI TMGI information
List of service area identifier A list of service area identifier for the applicable
MBMS broadcast area.
Frequency Identification of frequency if multi carrier support
is provided
SDP information (NOTE 1) SDP with IP multicast address and port number
used for V2X communication via MBMS.
Depending on the V2X application, the V2X
message can be carried directly on top of UDP,
without any streaming protocols.
NOTE 1: Typical V2X application does not require Codec information in the
SDP information.
Information element Description
TMGI TMGI information
List of service area identifier A list of service area identifier for the applicable MBMS
broadcast area.
Frequency Identification of frequency if multi carrier support is
provided
SDP information SDP with IP multicast address and port number used for
V2X Application Server discovery via MBMS.
The content of the message carries the local Service
Information and should include following information:
- Mapping of the V2X services, e.g. PSID or
ITS-AIDs of the V2X application of a PSID and ITS-AID to
V2X Application Server address (consisting of IP
address/FQDN and UDP port) for unicast, and V2X USD
for V2X communication via MBMS.
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What’s next? FS_eV2X
25
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Scope
Support for non-safety V2X services
Support for safety-related V2X services
Support for V2X services in multiple 3GPP RATs (e.g. LTE, New RAT (NR)) and networks environment, including aspects such as interoperability with non-3GPP V2X technology (e.g. ITS-G5, DSRC, ITS-Connect)
The identification of use cases and potential requirements will cover both evolved LTE RAT and new 3GPP RAT (e.g. NR) and will also cover V2X operation using 3GPP RATs where there are non-3GPP V2X technologies (e.g. ITS-G5, DSRC, ITS-Connect) in use
26
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Summary
The V2X message transmission can utilize PC5
MBMS
Unicast
V2X applications developed from IEEE 1609/ISO can be reused
Both IP based and non-IP based V2X messages are supported V2X message transmission/reception over PC5
V2X USD is used for MBMS reception of V2X messages
V2X Server USD is used for V2X Application Sever Discovery
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