Matches in SemOpenAlex for { <https://semopenalex.org/work/W59391384> ?p ?o ?g. }
Showing items 1 to 73 of
73
with 100 items per page.
- W59391384 abstract "As the number of vehicle accidents increases, car manufacturers and academic researchers have developed a vehicular safety system. The key component of the safety system is vehicular communications, by which vehicles exchange their local status information with neighbor vehicles and disseminate a warning message within a specified area. The challenge lies in satisfying stringent communication requirements of the safety system, extremely reliable packet delivery and low communication latency. Unfortunately, the current de-facto standard for vehicular communications, Dedicated Short-Range Communication (DSRC) cannot meet the requirements especially in high vehicle density. Specifically, high operation frequency of the DSRC causes serious signal attenuation in Non Line-Of-Sight (NLOS) conditions and the frequent exchanges of vehicle status information make the network easily congested.To overcome this challenge, we exploit extra TV White Space (TVWS), which Federal Communications Commission (FCC) allowed unlicensed users to access in the absence of license user's activities. The use of extra TVWS helps to improve the safety system because 1) adoption of extra frequency resource can mitigate the network congestion and 2) the excellent TVWS signal propagation improves the reachability of the safety message dissemination. Thus, in this doctoral dissertation, we design and evaluate TVWS-based Cognitive Radio Network (CRN) systems as a solution for realizing the vehicular safety system. First, we evaluate various vehicular MAC protocols using network simulator (NS-2) and investigate whether the MAC protocols are feasible to the vehicular safety system when only using a frequency band allocated to the DSRC (i.e., DSRC band). Next, we propose a TVWS-based CRN system that is specialized for the safety message dissemination in the safety system. More specifically, we utilize an extra TVWS band for emergency safety message dissemination, and exploit a DSRC band for 1) the exchange of control data and 2) the compensation of the reception errors. Finally, we propose a TVWS-based CRN system that supports reliable safety message dissemination in a NLOS corner. Specifically, for reliable dissemination in the NLOS corner, the proposed system leverages the excellent propagation characteristics of a TVWS signal and further improves the reliability by adopting a novel retransmission mechanism. Through in-depth simulation studies, we show that the proposed system outperforms previous system designs and supports the safety systems well." @default.
- W59391384 created "2016-06-24" @default.
- W59391384 creator A5059710776 @default.
- W59391384 date "2014-01-01" @default.
- W59391384 modified "2023-09-24" @default.
- W59391384 title "Cognitive Radio Network (CRN) System for Vehicle Safety Applications" @default.
- W59391384 hasPublicationYear "2014" @default.
- W59391384 type Work @default.
- W59391384 sameAs 59391384 @default.
- W59391384 citedByCount "0" @default.
- W59391384 crossrefType "journal-article" @default.
- W59391384 hasAuthorship W59391384A5059710776 @default.
- W59391384 hasConcept C101765175 @default.
- W59391384 hasConcept C101780184 @default.
- W59391384 hasConcept C102168758 @default.
- W59391384 hasConcept C127413603 @default.
- W59391384 hasConcept C147176958 @default.
- W59391384 hasConcept C149946192 @default.
- W59391384 hasConcept C158379750 @default.
- W59391384 hasConcept C192448918 @default.
- W59391384 hasConcept C30095986 @default.
- W59391384 hasConcept C31258907 @default.
- W59391384 hasConcept C41008148 @default.
- W59391384 hasConcept C47796450 @default.
- W59391384 hasConcept C53140260 @default.
- W59391384 hasConcept C555944384 @default.
- W59391384 hasConcept C76155785 @default.
- W59391384 hasConcept C94523657 @default.
- W59391384 hasConcept C96391052 @default.
- W59391384 hasConceptScore W59391384C101765175 @default.
- W59391384 hasConceptScore W59391384C101780184 @default.
- W59391384 hasConceptScore W59391384C102168758 @default.
- W59391384 hasConceptScore W59391384C127413603 @default.
- W59391384 hasConceptScore W59391384C147176958 @default.
- W59391384 hasConceptScore W59391384C149946192 @default.
- W59391384 hasConceptScore W59391384C158379750 @default.
- W59391384 hasConceptScore W59391384C192448918 @default.
- W59391384 hasConceptScore W59391384C30095986 @default.
- W59391384 hasConceptScore W59391384C31258907 @default.
- W59391384 hasConceptScore W59391384C41008148 @default.
- W59391384 hasConceptScore W59391384C47796450 @default.
- W59391384 hasConceptScore W59391384C53140260 @default.
- W59391384 hasConceptScore W59391384C555944384 @default.
- W59391384 hasConceptScore W59391384C76155785 @default.
- W59391384 hasConceptScore W59391384C94523657 @default.
- W59391384 hasConceptScore W59391384C96391052 @default.
- W59391384 hasLocation W593913841 @default.
- W59391384 hasOpenAccess W59391384 @default.
- W59391384 hasPrimaryLocation W593913841 @default.
- W59391384 hasRelatedWork W1975879459 @default.
- W59391384 hasRelatedWork W1975921960 @default.
- W59391384 hasRelatedWork W1984443455 @default.
- W59391384 hasRelatedWork W1998307478 @default.
- W59391384 hasRelatedWork W2024779880 @default.
- W59391384 hasRelatedWork W2039276979 @default.
- W59391384 hasRelatedWork W2051790897 @default.
- W59391384 hasRelatedWork W2056340084 @default.
- W59391384 hasRelatedWork W2078938638 @default.
- W59391384 hasRelatedWork W2080974587 @default.
- W59391384 hasRelatedWork W2091331636 @default.
- W59391384 hasRelatedWork W2094353518 @default.
- W59391384 hasRelatedWork W2153752947 @default.
- W59391384 hasRelatedWork W2161772110 @default.
- W59391384 hasRelatedWork W2181799432 @default.
- W59391384 hasRelatedWork W2509469073 @default.
- W59391384 hasRelatedWork W2883834562 @default.
- W59391384 hasRelatedWork W2903209072 @default.
- W59391384 hasRelatedWork W2904993752 @default.
- W59391384 hasRelatedWork W593598733 @default.
- W59391384 isParatext "false" @default.
- W59391384 isRetracted "false" @default.
- W59391384 magId "59391384" @default.
- W59391384 workType "article" @default.