1       Description

Information exchanged between the AMS of the Ego CAV and the peer AMS of a Remote CAV in the form of:

  1. Request to receive the Remote AMS’s Full Environment Representation of a specific M-Location corresponding to a U-Location of interest to the Ego CAV.
  2. Data of the requested Full Environment Representation or M-Location in it.

2       Functional Requirements

A CAV may request information about a Remote CAV understanding of it Environment by sending an Ego-Remote AMS Message. The request CAV may accept the request and send the a portion of its Full Environment Representation as the full or a subset of its M-Instance – called M-Locations – to the requesting CAV.

M-Location can be easily created thanks to the structure of the Full Environment Representation Data Type. provided by the MPAI Metaverse Model (MPAI-MMM). The Responding CAV may decide to send the requested M-Location with a level of detail that may also depend on the available bandwidth.

The Ego AMS may harvest available bandwidth and utilise it to send a version of the Full Environment Representation that is compatible with the available mobile bandwidth.

The AMS receiving the data reconciles the different values by considering, e.g., the distance of the ego CAV from the object vs the distance of the other CAV from the object.

3       Syntax

https://schems.mpai.community/CAV2/V1.0/data/EgoRemoteAMSMessage.json

4       Semantics

Label Size Description
Header N1 Bytes Road State Header
– Standard 8 Bytes The characters “MMM-ERA-”
– Version N2 Bytes Major version – 1 or 2 Bytes
– Dot-separator 1 Byte The character “.”
– Subversion N3 Bytes Minor version – 1 or 2 Bytes
EgoRemoteAMSMessageID N4 Bytes Identifier of Ego-Remote-AMS Message.
AMSMessageRequest N5 Bytes Ego CAV’s Request
– CAV ID N6 Bytes Ego CAV ID
-U-Location N7 Bytes Specification of the portion of the Environment.
EgoRemoteAMSMessageData N8 Bytes Data of Ego-Remote-AMS Message
– MLocationID N9 Bytes M-Location in Remote AMS.
– MLocationData N10 Bytes M-Location Data in Ego AMS.
DescrMetadata N11 Bytes Descriptive Metadata