Survey on Context-Aware Publish/Subscribe Systems for VANET

Abstract

The publish / subscribe scheme is an efficient paradigm for communication widely used in wired networks. However the use of this paradigm in the context of mobile networks such as VANETs is still an open research topic. In particular, the communication needs of mobile nodes often depend on the node state, location and/or surroundings. Consequently, extensions to the P/S paradigm have been proposed that introduce the concept of node context. This paper propose a survey on these context-aware publish / subscribe solutions for VANETs. We will particularly focus our discussion on two example applications drawn from the context of civil aviation and will argue that Aeronautical Ad hoc Networks (AANETs) are a subgroup of VANETs.

Vehicular content centric network (VCCN)

“…However, they have some conceptual differences, mainly in terms of a source of the content flow and content validity over time, as discussed in [17]. Therefore, we can conclude that in CCN, each content is self-authenticated, identical and can be retrieved regardless of its location, thus providing an attractive solution for highly dynamic and mobile environments such as VANETs.…”

Performance of Context-Aware Publish/Subscribe Systems for AANET

“…This sub-category shows a lot of specic characteristics, the most important being the high mobility of nodes and the predictability of movements. As detailed in [1], AANET (Aeronautical Ad hoc NETworks, which consist in aircraft acting as nodes of a MANET) can be seen as a subcategory of VANET. In a context of increasing air trac and new needs in term of air ground communication systems, AANET represents a relevant solution as explained in [2].…”

“…The second is the introduction of node context to reduce the scope of events/subscriptions and use more eciently the network resources. As explained in [1], this context can be assimilated to a location context (an area or just a position). For example, with a classical Publish / Subscribe solution, aircraft can subscribe to "dangerous weather situation".…”

“…Finally, section 4 concludes this article and introduces further work on this topic. 2 Context-Aware Publish/Subscribe solutions in VANET As explained in [1], existing Context-Aware Publish/Subscribe systems that are adapted for VANET can be classied in three categories: geographic routing, proximity routing and overlay network based solutions. Geographic routing based solutions like [6] or [7] are based on the assumption that each event / subscription is linked to a geographical area.…”

Aeronautical Ad Hoc Network for Civil Aviation

“…Several routing algorithms from the MANET and the VANET communities uses these metrics and should be considered for AANETs (similarities between VANET and MANET have been studied in [12], e.g. TOPO [13], DSR [14] , GPSR [15], MUDOR [16].…”