wwan 中文意思是什麼
wwan
解釋
永遠支持降雪-
Being resipansible for technology guality of this unit, i have arganized and completed or then 10 great consultative projects in meteluvgical industing including feasible research repart and preliminary design of dan yang ring - type sintering plant loaned from world bank. designed no. 6 semi - contiuars rolling mill line of shagang group ; nangang group steel making plant water treatinent system, feasible research report and preliminarg design of nangang group no. 3 continuous casting machiue and hebei wwan iron making co. 24m2 rinn - tgpe sintering plant, as chief - disigner, none argamizing working drawing disign far it
作為本單位技術質量負責人，近年來組織了完成了10餘項較大規模的冶多工程咨詢任務，其中包括世行貸款的丹陽環燒工程可研和初步設計；擔負港沙鋼集團六軋車間半連軋生產線設計；南鋼集團煉鋼廠水處理系統完善；南鋼集團煉鋼廠矩形櫃連鑄可研及初步設計；河北武安市鐵業公司24m ^ 2環燒工程擔任總設計師，完成了初步設計，正組織開展施工圖設計。 -
Wireless wide - area networks ( wwans ) are charactered by very low and variable bandwidths, very high and variable delays, significant non - congestion related loss, asymmetric uplink and downlink channels, and occasional blackouts. additionally, the majority of the latency in a wwan connection is incurred over the wireless link
無線廣域網（ wwans ）由於以下特徵而有別于有線廣域網（如internet ） ：較低並且易變的帶寬，很高且易變的延遲，與擁塞無關的數據丟失，非對稱的上行和下行通道，以及偶爾的昏眠狀態，此外，在無線廣域網上的大部分的延遲發生在無線連接部分。 -
It discusses the characteristic of each level in osi model from the point of wwan first, then analyses clearly the primary technologies used in gprs / sms / csd and a topology structure model of the wwan based on gprs / sms / csd is presented. it also deeply discusses the integrate technology of gprs / sms / csd in a example of fujian environmental automatization system, at the same time a network model of wwan based on gprs / sms / csd is brought forward. last, there are the module programmers of the system
本文從計算機開放系統互聯參考模型入手，按osi參考模型7層協議結構順序，逐步介紹了在無線廣域網環境中osi層次模型的特點，在此基礎上，詳細分析了gprs / gsm技術和簡訊息技術，並給出一個基於gprs /簡訊息/ csd的無線廣域網的網路拓撲結構；以福建省環境自動監測監控系統的分析和設計為例，探討了現階段gprs技術和簡訊息技術、電路交換技術在無線計算機網路系統中的集成問題，並給出了一個基於gprs /簡訊息/ csd的無線廣域網網路模型，最後是系統的模塊程序設計。 -
An efficient handoff decision algorithm for vertical handoff between wwan and wlan
Wwan和wlan間的一種高效的垂直切換觸發演算法 -
In this paper, i present rbtcp, a reliable transport protocol that addresses rate control and reliability over commercial wwan networks such as cdpd
為了敘述方便我將此改進后的tcp稱為rbtcp （ ratebasedtcp ） 。
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