User's Manual Part 2

Psion Teklogix 7535 Hand-Held Computer User Manual 247

Chapter 6: Tekterm Application

802.IQ v2

Initial RTT (Round Trip Time)

Round trip time is the elapsed time between a 7535 hand-held computer transmis-

sion and an access point acknowledgement. Each 7535 continuously adjusts the

acceptable round trip time, calculating the average elapsed time over a number of

transmissions. If an acknowledgement takes longer to receive than the average

round trip time calculated, the 7535 will resend the transmission.

Because 7535s cannot calculate an average round trip time without a number of

transmissions, a starting point or “Initial Round Trip Time” is required. The 7535

uses the time assigned to the “Initial RTT” parameter as a starting value for round

trip calculations. Once the 7535 begins transmitting and receiving data, this value

will be adjusted to reﬂect the actual average round trip time between transmissions

and acknowledgements.