GPRS 流量計算按1000臺營運車輛計 換算表：主要表明在用量大時比傳統的費用較低，如何根據自己的需求選擇通訊方式?！ P包頭長度為20字節，TCP包頭長度也是20字節,共計40字節/條，協議回復40字節/包 終端上傳位置、報警等其他信息：平均為70＋40＋40＝150字節/條 終端上傳營運數據：平均為110＋40＋40＝190字節/條 終端應答搶答信息：平均為72＋40＋40＝152
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