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Network Working Group                                             D. Liu
Internet-Draft                                             Alibaba Group
Intended status: Experimental                              March 9, 2015
Expires: September 10, 2015


             Scenario of Intelligent Transportation System
                       draft-liu-its-scenario-00

Abstract

   This document discuss the scenario of intelligent transportation
   system.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on September 10, 2015.

Copyright Notice

   Copyright (c) 2015 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must



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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Scenario of Intelligent Transportation System Mobile
       Applications  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Waze  . . . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.2.  iRezQ . . . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.3.  Sentinel  . . . . . . . . . . . . . . . . . . . . . . . .   4
     1.4.  COYOTE  . . . . . . . . . . . . . . . . . . . . . . . . .   5
   2.  Communication Requirement of ITS Application  . . . . . . . .   5
   3.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   6.  Normative References  . . . . . . . . . . . . . . . . . . . .   6
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Scenario of Intelligent Transportation System Mobile Applications

   This document introduces several intelligent transportation system
   mobile applications.  From those applications, we analyze the
   scenario and requirement of intelligent transportation system.

1.1.  Waze

   Waze (https://www.waze.com/) is a community-based traffic and
   navigation application.  The drivers who use waze can share the
   traffic related event to other waze users.  Traffic related event
   includes traffic jams, accidents, road hazards etc.  It uses the idea
   of UGC (User Provided Content) to generate real-time traffic map.
   Waze users can also communicate with each other using the waze
   platform.  For example, a group of friends that have the same
   destination can share their location to coordinate everyone's arrival
   times.

   Waze architecture is shown in figure 1.













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                          preamble to the figure.

             +---------------------------+
             |      Waze Platform        |
             |     +Navigation           |
             |     +Road Info            |
             |     +Traffic Info         |
             |     +Group communication  |
             +---------------------------+
                   |       |         |
       +-----------+       |         +----------+
       |                   |                    |
   +----------+       +----------+        +----------+
   | Waze App |<----> | Waze App |<------>| Waze App | ...
   +----------+ share +----------+  share +----------+

    Driver               Driver              Driver

                        Figure 1: Waze architecture

   Summary of the Waze architecture

   o  There is a centralized waze server that collect the road and
      traffic information.

   o  Waze application can communicate with each other through
      centralized waze server.

   o  Waze application's communication is based on TCP/IP.

1.2.  iRezQ

   iRezQ is another mobile application in the ITS field.  Its main use
   case is for driving safety.  The iRezQ mobile application running on
   the driver's mobile phone can monitor the vehicle's speed to detect
   whether there is a collision.  When collision is detected, iRezQ
   application can dial the emergency call automatically.  The
   architecture of iRezQ architecture is shown in figure 2.













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             +--------------------+
             |   SOS Operator     |
             +--------------------+
                        ^
                        |
             +--------------------+
             |   iRezQ Platform   |
             +--------------------+
               |        |       |
        +------+        |       +--------+
        |               |                |
   +---------+      +---------+     +----------+
   |iRezQ App| -->  |iRezQ App|     |iRezQ App |
   +---------+ Warn +---------+     +----------+
     Crash

                       Figure 2: iRezQ architecture

   Summary of iRezQ architecture:

   o  The iRezQ mobile application is used to detect whether there is a
      collision occurs.  It uses the sensors in the mobile phone and
      certain algorithm to determine whether there is a crash happening.

   o  If there is a crash detected by iRezQ mobile application, it will
      warn the driver and sent out iRezQ-Warning message to all the
      nearby drivers who are using iRezQ mobile application.  The nearby
      iRezQ users will receive a "WARNING!  ACCIDENT NEARBY" message.
      It will prevent the nearby drivers running into the collision
      again and result in a second crash.

   o  For premium member, iRezQ mobile application will alert the iRezQ
      emergency rescue center where an operator can see the driver's
      position and breaking pattern presented i a graph.  The iRezQ
      rescue center will try to reach the driver if they suspect a true
      accident.

1.3.  Sentinel

   Sentinel is security system used in Dakar rally.  It is a security
   system that alerts the drivers and riders about imminent overtakes or
   accidents.  It beeps and glows to warn the rider that he is going to
   be overtaken.  It alerts the participant who's being overtaken when
   there are 200m between two vehicles.  The architecture of sentinel is
   shown in figure 3.






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                             +----------+
                             |  Vehicle |
                             +----------+
                                  |   200m    +----------+
                                  +---------->| Vehicle  |
                                      Warn    +----------+

   Figure 3: Sentinel architecture

   Summary of sentinel architecture:

   o  There is a vehicle to vehicle distance detection/communication in
      sentinel architecture.

1.4.  COYOTE

   Coyote System is a provider of community-based driving assistants.
   Coyote provides real-time information on speed limits, road hazards
   and traffic conditions to the coyote users.  The architecture of
   coyote is shown in figure 4.


                     +------------------+
                     |  coyote platform |
                     +------------------+
           +------------------|--------------------+
      +----------+       +----------+       +-----------+
      |coyote App|       |coyote App|       | coyote App|
      +----------+       +----------+       +-----------+

                       Figure 4: Coyote architecture

   Summary of coyote architecture:

   o  Coyote has similar architecture as Waze.  Coyote users can share
      traffic information to coyote platform and the coyote platform can
      share the traffic information to other coyote users.

2.  Communication Requirement of ITS Application

   This section discusses the communication requirement of ITS
   application.  Section 1 introduces several ITS mobile applications.
   From the analysis, we can conclude that:

   o  All the communication between the ITS mobile application and its
      backend server is based on IP.





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   o  For some of those ITS applications, there is no direct
      communication between the ITS mobile applications but there is
      communication between ITS applications through the backend server.

   o  For some ITS application, for example, Sentinel, there is a
      requirement of direct communication between vehicles.

   IP provides the most flexibility from the developer's perspective.
   There are plenty of developers that are familiar with developing
   application based on TCP/IP.  If there is a direct IP connection
   between vehicles, it will help the developers to develop more
   innovative and useful applications.

3.  IANA Considerations

   This document makes no request of IANA.

4.  Security Considerations

   TBD

5.  Acknowledgements

   TBD

6.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, March 1997.

Author's Address

   Dapeng Liu
   Alibaba Group
   Beijing
   Beijing

   Phone: +86-1391788933
   Email: maxpassion@gmail.com












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