What type of network is better to choose?

Question

Data transfer

The task was set: to develop a radio network designed for rapid data exchange between mobile objects without the help of dedicated network nodes, while each network terminal is equipped with audio, photo and other sensors, information from which can be requested by the radio network command node.
Requirements to the system:
- adaptation of the network to changing the location of terminals;
- continuous check of the terminals operability by the command node of the radio network.
And given the characteristics :
Maximum number of active subscribers in the network: 70
Service area radius: 1020 m
Guaranteed data transfer rate: 0.3 Mbps
Type of terrain: urban development
Bit error probability, not more than Pb: 3*10-6
Mobile station radiation power Rizl : < 0.1 W
PR: 75%