GPRS 流量計(jì)算按1000臺(tái)營(yíng)運(yùn)車輛計(jì) 換算表：主要表明在用量大時(shí)比傳統(tǒng)的費(fèi)用較低，如何根據(jù)自己的需求選擇通訊方式。 IP包頭長(zhǎng)度為20字節(jié)，TCP包頭長(zhǎng)度也是20字節(jié),共計(jì)40字節(jié)/條，協(xié)議回復(fù)40字節(jié)/包 終端上傳位置、報(bào)警等其他信息：平均為70＋40＋40＝150字節(jié)/條 終端上傳營(yíng)運(yùn)數(shù)據(jù)：平均為110＋40＋40＝190字節(jié)/條 終端應(yīng)答搶答信息：平均為72＋40＋40＝152
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超聲波流量計(jì)實(shí)時(shí)信息，超聲波流量計(jì)資料下載，超聲波流量計(jì)價(jià)格，相信大連索尼卡—流量測(cè)量問(wèn)題輕松解決。
2010年4月27日
GPRS 流量計(jì)算
Tags: GPRS 流量計(jì)算
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