device-to-device for public safety (ddps) · device-to-device for public safety (ddps) 4 th...
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Device-to-Device for Public Safety (DDPS) 4th OpenAirInterface Workshop November 7th and 8th, 2017 Orange Gardens, Paris France Contact: Jérôme Härri Email: [email protected] NIST DDPS contact: Richard Lau Email: [email protected]
This work was performed under the following financial assistance award 70NANB17H167 from U.S. Department of Commerce, National Institute of Standards and Technology.
Slide 2 | 13/11/2017 © 2017 Vencore Labs, Inc. All rights reserved.
• DDPS is a National Institute of Standards and Technology (NIST) Public Safety Innovation Accelerator Program (PSIAP)
• Vencore Labs (Prime) and EURECOM collaborate on DDPS technology • Vencore Labs
– Richard Lau (NIST DDPS PI) – Tony Triolo (NIST DDPS co-PI) – Stephanie Demers – William Johnson – Heechang Kim – James Dixon
• EURECOM
– Raymond Knopp – Panagiotis Matzakos – Tien-Thin Nguyen – Cedric ROUX
Acknowledgements
http://www.openairinterface.org/
Slide 3 | 13/11/2017 © 2017 Vencore Labs, Inc. All rights reserved.
Problem Space & Stakeholders Key Stakeholders: • Law enforcement • Firefighters • Medical personnel • Military organizations • Volunteer groups
Key CONOPS for Public Safety: • Fall back in the event of complete LTE
network failure, e.g. natural disasters • UE-UE communication within coverage • UE-UE communication outside coverage • Mixture of UE communication within
and outside coverage
Key Services: Mission-Critical Voice 3GPP Proximity Service (ProSe) 1:1 and 1:many Group Communication Service Continuity
New sidelink channel Existing LTE channel
In-network
Off-network
Partial-in -network
Cell tower
ProSe Function EPC
Relay
S1 PC3
Uu
Slide 4 | 13/11/2017 © 2017 Vencore Labs, Inc. All rights reserved.
• Build complete ProSe stack by extending current OpenAirInterfaceTM implementation to include ProSe services based on 3GPP Rel-14 specifications
• Solve open issues related to resource allocation, time synchronization, and service continuity – Develop new scheduling algorithms for autonomous
resource allocation to minimize collision probability. – Develop novel multi-antenna-based synchronization
techniques to achieve significant improvement in UE autonomous synchronization
– Solve complex service continuity challenges for on-, off-, and partial-on-network operations
• Demonstrate ProSe solution on software defined radio platform
• Help create an ecosystem that can be provided to interested vendors for commercialization on a system-on-a-chip platform
DDPS Objectives
eNB
A B
M Interference
eNB
A
B
Relay-UE
Service Continuity
C
Interference
Slide 5 | 13/11/2017 © 2017 Vencore Labs, Inc. All rights reserved.
• Scenario 1: Off-Network D2D – Two UEs are off-network but
communicate directly via a sidelink channel
• Scenario 2: On-Network D2D – Two UEs are located closed to their eNodeB
but communicate directly via a sidelink channel
• Scenario 3: UE-to-Network Relay – UE A is closed to its eNodeB while a second
UE B is out-of-coverage but within coverage of UE A. UE A acts as a relay to remote UE B and relay its traffic (e.g., to a FTP server, or another on-network UE C)
DDPS Scenarios
A
BPC5
eNB
A
B
1
2
A and B on-network get configuration from ProSe function
A and B communicate via D2D mode
ProSeFunctionPC3
EPC
PC5
eNB
A
B
ProSe Function
PC3
EPC
PC5
c
Slide 6 | 13/11/2017 © 2017 Vencore Labs, Inc. All rights reserved.
LTE ProSe 3GPP Standardization Timeline
2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
4G LTE rel.8 4G LTE rel.9
4G LTE-A rel.10 4G LTE-A rel.11
4G LTE-A rel.12 4G LTEA Pro rel.13
4G LTE-A Pro rel.14 4G LTE rel.15
4G
3G
5G LTE rel.15
5G LTE rel.16
….
Sept
. 201
8
June
201
6
ProSe Stage 1
ProSe Stage 2
ProSe: Proximity Services
5G
Slide 7 | 13/11/2017 © 2017 Vencore Labs, Inc. All rights reserved.
• LTE ProSe enables establishment of communication paths between two or more ProSe-enabled UEs.
• LTE ProSe enables communication functions 1. One-to-One – Direct UE-to-UE Communication 2. One-to-Many - Communication to a ProSe group
• LTE ProSe Functions: – Discovery
• Mode A – ‘I am here’ • Mode B – ‘how is there ?’
– Direct Communication • Mode 1 – Coordinated by eNB • Mode 2 – Ad-Hoc mode
LTE Proximity Services (ProSe)
Restricted to Public Safety (rel.14)
Slide 8 | 13/11/2017 © 2017 Vencore Labs, Inc. All rights reserved.
LTE Prose Extended Architecture
UE B
ProSe application
LTE-Uu E-UTRAN
UE A
S1
ProSe Function
MME
S/PGW
HSS
ProSe application
HSS SLP
ProSe Application
Server
S6a
PC3 PC4a PC4b
PC2
PC1
PC3
LTE-Uu PC5
PC1
New Architecture Elements: a) ProSe Function – management of D2D communication (authentication, discovery) b) PC5 interface – UE to UE c) PC3 interface – Prose Function to UE
Source: 3GPP
Slide 9 | 13/11/2017 © 2017 Vencore Labs, Inc. All rights reserved.
LTE ProSe – New Slidelink (SL) Channels
a) Sidelink Channels
b) Slidelink Pool
Source: Dr. Gallo, EURECOM
Slide 10 | 13/11/2017 © 2017 Vencore Labs, Inc. All rights reserved.
Discovery & One-to-One Communication
ProSe Function Announcing UE Monitoring UE
Announce over PC5 Monitor PC5
PC5_DISCOVERY (Announcement)
PC3
PC5-D Direct Communication Request
Direct Communication Accept PC5-S
IP address allocation
One-to-one Direct communication PC5-U
Service provisioning
PC5-C Synchronization via PC5-C
Slide 11 | 13/11/2017 © 2017 Vencore Labs, Inc. All rights reserved.
Relay Discovery, Selection & Direct Communication
Remote UE
ProSe UE - to - NW
Relay eNB MME S - GW P - GW
3. Establishment of connection For one-to-one Communication
Model A
Model B 2. Discovery Procedure
OR
4. IP address/prefix allocation
1. E-UTRAN Initial Attach and/or UE requested PDN connectivity
Relayed traffic
3. Relay UE may establish a new PDN connection for Relay
5. Remote UE Report(Remote User ID, IP info)
6. Remote UE Report(Remote User ID, IP info)
Slide 12 | 13/11/2017 © 2017 Vencore Labs, Inc. All rights reserved.
ProSe Controller (Vencore)
UE ip . ko kernel module )
PDCP
RLC
MAC
L 1
PDCP
RLC
MAC
RRC
RRC eNodeB PC
5 - U
PC 5 -
S
PC 5 -
D
RRC
Control socket
drb
slrb
lcid lcid
slrb signaling
drb - config , logical channel config
rnti rnti
User Interface (Vencore)
OAI Architecture for ProSe Interfaces
PDCP
RLC
MAC
lcid
drb
rnti
Configuration files
slrb
PC
3
PC5-C
Remote UE
UE (in/out EUTRAN)
Slide 13 | 13/11/2017 © 2017 Vencore Labs, Inc. All rights reserved.
OAI Emulation Extensions for DDPS
SL PHY Stub UE
SL PHY Stub UE
Socket Interface
UE Sidelink
MAC
UE Sidelink
MAC
eNB L2
receive_SCI
receive_SL_sdu SL_Tx_request
SCI_Config
SL_indications SL_indications
New interface
UE Sidelink
PHY
UE Sidelink
PHY
Sidelink PHY-to-PHY scope
Slide 14 | 13/11/2017 © 2017 Vencore Labs, Inc. All rights reserved.
• Phase 1 Stage 1 - Emulation – Redesign of emulation mode – new PHY STUB
• Phase 1 Stage 2 - Implementation – Part A – Implementation of the ProSe Function/RRC/PDCP/RLC/MAC – Part B – Implementation of the PHY
• Phase 1 Stage 3: Performance Evaluation – Emulation-based Proof-of-Concept and Performance Evaluation
• Phase 2 – Real-Time Lab
– Real-time UE PHY and Field Deployment
D2D for Public Safety on OAI – RoadMap
2017
Phase 1 - Stage 1
2018 JUL AUG SEPT OCT NOV DEC JAN FEB MAR APR MAY
Phase 1 - Stage 2 Phase 1 - Stage 3
• OpenAir Code: – https://gitlab.eurecom.fr/matzakos/LTE-D2D
JUN .. 2019
SEP … NOV JAN
Phase 2
Not Yet Approved…
This work was performed under the following financial assistance award 70NANB17H167 from U.S. Department of Commerce, National Institute of Standards and Technology.
4th OpenAirInterface Workshop November 7th and 8th, 2017 Orange Gardens, Paris France Contact: Jérôme Härri Email: [email protected] NIST DDPS contact: Richard Lau Email: [email protected]
Device-to-Device for Public Safety (DDPS)