The Optimal Sampling Period of a Fingerprint Positioning Algorithm for Vehicle Speed Estimation

Table 1

The definition of notation.

Parameter	Description
𝜆 (call/hr)	The call arrival rate
𝜏 (hr)	The call interarrival time
𝑡 (hr)	The call holding time
1/𝜇 (hr)	The mean call holding time
𝑓 (car/hr)	The traffic flow
𝑣 (km/hr)	The average vehicle speed
𝑥 (hr)	The time × is between the preceding call arrival and entering the target road
𝑐 (second)	The sampling period
𝑑 (km)	The distance of target road
𝑟 (count/hr)	The reporting data which we acquire per hour
𝑤 (count/hr)	The waste computing data which we waste per hour