1 / 14

A Survey Of Inter-Vehicle Communication Protocols And Their Applications

A Survey Of Inter-Vehicle Communication Protocols And Their Applications. A summary. Table of Content. Classification of applications Communication requirements Design decisions Design tradeoffs Discussion Conclusion. Classification of Applications. General Information Services

manon
Download Presentation

A Survey Of Inter-Vehicle Communication Protocols And Their Applications

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. A Survey Of Inter-Vehicle Communication Protocols And Their Applications A summary

  2. Table of Content Classification of applications Communication requirements Design decisions Design tradeoffs Discussion Conclusion

  3. Classification of Applications General Information Services Vehicle Safety Information Services Individual Motion Control Group Motion Control

  4. Classification of ApplicationsGeneral information services Scope: Does not involve the automatic control of vehicles Does not involve vehicle safety General information services generally require: Low communication overhead High information delivery ratio Examples: Mobile internet P2P data queries

  5. Scope: Does involve vehicle safety Delayed information may result in compromised safety or renders application useless Tolerance to delay generally increases with source-receiver distance Examples: Accident warning Obstacle warning Dissemination of road conditions Classification of ApplicationsVehicle safety information services

  6. Classification of ApplicationsIndividual motion control Scope: Keep vehicles out of each other’s way using individual motion planning and regulation methods No group motion is involved Interaction with neighbors typically lasts for seconds or minutes Examples: Adaptive cruise control Vehicle collision avoidance

  7. Classification of ApplicationsGroup motion Control Scope: Generally involves organizing vehicles in groups 3 Types: Group planning with individual regulation E.g. coordinated adaptive cruise control (CACC) Leader-based motion regulation The leader coordinates the joining and leaving of vehicles Virtual leader motion regulation Directives arrive using a distributed consensus process Many-to-many communication may be used

  8. Communication requirements Latency: Types 2 & 3 require hard real-time latencies Type 4 requires soft real-time latencies Reliability: Types 2 & 3 require a high-probable delivery of data Type 4 requires the ability to determine whether the data was received Scaling: Types 1 & 2 require a high scaling Types 3 & 4 require a medium scaling • General information services • Vehicle Safety Information Services • Individual Motion Control • Group Motion Control

  9. Communication requirements Scope: The scope of types 1 & 2 may be larger than 3 & 4 as they do not physically interact. GroupStructure: Types 1, 2 & 3 require non-persistent relationships Type 4 requires persistent relationships • General information services • Vehicle Safety Information Services • Individual Motion Control • Group Motion Control

  10. Design decisions Considerations: Medium Access Schemes TDMA, IEEE802.11 Access Mapping Can be done based on location, tokens, etc. Communication Organization Common approaches: flooding, opportunistic flooding, clustering Definition of Receiver Group Cluster membership, geographic location, reception group Network resource allocation Lower consumption of resources (e.g. using TTL or priorities) Group Membership Services Implicit or explicit membership

  11. Design tradeoffs

  12. Selected protocols Type 1: MDDV Protocol Opportunistic flooding Geocast Reliability of 90%-100% in simulations Type 2: VCWC Protocol Application-specific congestion control Scale well Type 3: ADS-B Protocol Periodic broadcast of motion reports No acknowledgements Type 4: RNP Protocol Operates on top of Mobile Reliable Broadcast Protocol (M-RBP) Verification of message reception • General information services • Vehicle Safety Information Services • Individual Motion Control • Group Motion Control

  13. Discussion Many protocols are very specific in solving problems for certain applications Layered protocol architecture may prevail in the future It is unclear if the advantages of integrated protocols outweigh their disadvantages Transportation applications are likely to evolve into a complete system that addresses many applications using multiple protocols (e.g. AHS)

  14. Conclusion 4 types of applications For each application the requirements were identified Focus on major design decisions Tradeoffs in the design greatly impact the performance Set of protocols was analyzed using these tradeoffs for each application

More Related