Real-Time Communication Support for Cooperative, Infrastructure-Based Traffic Safety Applications

Table 3

List of parameters.

𝐶	Number of RT channels for priority zone
𝐷𝑖	Deadline
𝐷^′𝑖	Adapted deadline
𝐷info	Deadline for road information update packets
𝐷merge	Deadline for merge heartbeat packets
𝐷rec	Deadline for merge recommendation packets
𝐸𝑖	Experienced transmission time
𝐸info	Experienced transmission time for road information update packets
𝐸merge	Experienced transmission time for merge heartbeat packets
𝐸rec	Experienced transmission time for merge recommendation packets
𝐹CFP	Fraction of bandwidth available for RT traffic
ℎ(𝑡)	Workload function
𝐿𝑖	Packet length
𝐿poll	Packet length of a polling packet
𝑃𝑖	Period
𝑃info	Period for road information update packets
𝑃merge	Period for merge heartbeat packets
𝑃rec	Period for merge recommendation packets
𝑄	Number of logical RT channels
𝑅	Bit rate
𝑅CFP	Experienced (reduced) bit rate for RT traffic
RSU → 𝑉	Transmission RSU to vehicle
𝑡	Instance in time
𝑇blocking	Blocking time
𝑇CBP	Duration of a CBP
𝑇CFP	Duration of a CFP
𝑇𝑖	Total transmission time
𝑇prop	Propagation delay
𝑇SF	Duration of a superframe
𝑇SIFS	Duration of a SIFS
𝑈	Utilization
𝑉 → RSU	Transmission vehicle to RSU
𝑍	Number of priority zones