For the CSMA/CA curve, its performance decreases rapidly after passing through the point M, however, it is still better than TDMA
counterpart before reading point C.
Despite the research efforts spent to improve the performance of TDMA
in VANETs, most of these TDMA-based MAC protocols do not support service differentiation and act similarly with various types of data traffic without giving a higher access priority for safety applications.
. We first consider the Con-TDMA scheme without the cooperation of the relay node.
To avoid collision the coordinator allots TDMA
slots to the nodes based on their queue state.
According to the above simulation results, the total time of a super frame [t.sub.Frame], the time of the CSMA stage in a super frame [t.sub.CSMA], the time of the TDMA
stage in a super frame [t.sub.TDMA], and the time of the set up period [t.sub.Setup] can be calculated as follows:
The worse scalability and longer delay have blocked TDMA
based MAC protocols from being applied to many scenarios, but it has good power efficiency, lower collision rate, and easy to practice.
Several strategies for adequately representing the chromosomes in TDMA
broadcast scheduling related GA optimization algorithms have been reported.
The ability to utilize dual-mode SCPC and TDMA
in the same VSAT platform is a significant advantage for satellite service providers looking for flexibility in deployment of applications, while reducing CAPEX and OPEX.
TF Dragon's network engineers were able to work out a couple of courses of action to combat the taxing of the TDMA
network and increase customer quality of service.
When implementing the evolution of TDMA
wireless networks to GSM/GPRS and then W-CDMA, service providers "overlay" GSM/GPRS by integrating a new base transceiver station (BTS) with the existing TDMA