Subscriber usage per month: 150 minutes

Day per month: 24

Busy hours per day: 6

Allocated spectrum: 4.8 MHz

Frequency reuse plan: 4/12

RF channel width: 200kHz(full rate)

Present number of subscribers in a zone: 50,000

Subscriber growth per year: 5%

Network roll-over period: 4year

Number of packet calls per session (NPCS): 5 (see Figure)

Number of packets within a packet call (NPP):25

Reading time between packet calls (Tr): 120s

Packet size (NBP): 480 bytes

Time interval between two packets inside a packet call (Tint): 0.01 s

Total packet service holding time during one hour( T tot): 3000 s

Busy hour packet sessions per subscriber:0.15

Penetration of data subscriber: 25%

Data rate of each subscriber: 48kbps

Packet transmission time: 10 s