李學智臺灣大學:電信工程學研究所王逸Wang, YiYiWang2010-07-012018-07-052010-07-012018-07-052009U0001-1208200919421400http://ntur.lib.ntu.edu.tw//handle/246246/188263目前台灣電信服務營收,行動電話佔最大的比重高達59.20%,用戶已經習慣於行動通訊,對於行動電話業者而言,單純提供語音服務以及通話費率的下降已經無法創新營收,因此業者無不積極推動行動上網服務,希望能開創新的服務滿足用戶。是業者也面臨一個問題,提供行動上網服務,不論是基地台與無線網路控制器(Radio Network Controller,RNC),或者是基地台容量擴充,所佔用的系統資源遠高於傳統語音服務。因此對於業者而言如何規劃每年第三代行動通信基地台系統容量擴充,就更行重要。往在做基地台系統容量擴建,所有話務預估均採用假設的,並未考量實際話務的分佈,這樣的方式容易造成容量估算的錯誤,此研究考慮到業者大部份的站點為2G與3G共站,因此可以參考既有2G或者3G的話務量分佈,再配合預估的用戶成長去做容量的估算。而話務模型部份,雖然是數據服務的概念,但是於容量計算仍與傳統語音類似,因此將應用Erlang的概念去做推論,最後再觀察半年實際系統容量擴建狀況來做驗證,以期能提供較為精準的基地台系統容量擴建規劃。At the present, the income from mobile communication service makes 59.26% of the revenue of the telecom industry in Taiwan. The users are accustomed to mobile communication, and the descending rate of vocal communication is pushing the operators to develop new contents and provide mobile internet related services to satisfy the users and as a result to make a breakthrough to surmount the present revenue.owever, the operators are facing the same problem:The mobile internet service takes much more system resources than the traditional vocal communication service, in terms of the amount of radio network controller (RNC) and the capacity of base stations. Therefore, how to accurately plane ahead the expansion of network capacity of the 3rd generation communication is obviously a critical issue for the operators.n the past, when planning the expansion of base station capacity, the traffic estimation was based on assumption, without considering the actual distribution of the traffic. As a result, the accuracy of the estimate capacity is usually unsatisfying. This research has taken into consideration that in most of the cases, 2G & 3G collocated at the same base station,therefore, it would estimate the capacity based on the past traffic record of 2G and 3G, and the expected growth rate of user. The traffic model, although base on the concept of packet switch service, has similar estimation rules with traditional vocal traffic. Therefore, we will make the inference based on the concept of Erlang, then, to test and verify the inference with the actual traffic expansion in the following six months. This research aims at accomplishing a more accurate planning tool for the expansion of base stations.第一章 緒論……………………………………………………… 1.1前言……………………………………………………………….1.2研究動機與目的………………………………………………….3.3論文架構………………………………………………………….4二章 系統介紹………………………………………………….5.1概論……………………………………………………………….5.2第三代行動網路的架構………………………………………….5.3 HSDPA簡介 …………………………………………………….6.3.1 HSDPA新增之功能………………………………………6.3.2 展頻碼(Spreading Code) ………………………………9.4 Node B簡介 …………………………………………………….11.4.1 UltraSite Node B…………………………………………12.4.2 Flexi Node B ……………………………………………17.5 Node B容量規劃……………………………………………….22.5.1 WSP的容量規劃於3G狀況下………………………….22.5.2 WSP的容量規劃於HSPA狀況下……………………….25.5.3 基地台容量分配原則 ………………………………….30三章 話務報表介紹…………………………………………….39.1概論 …………………………………………………………….39.2網管報表架構 ………………………………………………….39.3歐蘭Erlang …………………………………………………….40.3.1 歐蘭Erlang定義 ……………………………………….40.3.2 Erlang B ………………………………………………….41.4相關報表說明 ………………………………………………….41四章 網路容量設計與結果驗證………………………………48.1前言 …………………………………………………………….48.2 網路容量的設計架構 …………………………………………48.3假設說明 ……………………………………………………….50.3.1 用戶數假設 …………………………………………….50.3.2 傳輸估算 ……………………………………………….54.3.3 WSPC/CE估算 ………………………………………….56.3.4 第二個載頻(2nd Carrier)擴充估算 …………………….58.4估算結果驗證 ………………………………………………….61.4.1傳輸E1驗證…………………………………………….61.4.2 WSPC(CE)驗證………………………………………….62.4.3 2nd Carriers驗證………………………………………….63五章 結論與未來展望…………………………………………65.1全文總結 ……………………………………………………….65.2未來研究方向 ………………………………………………….65考文獻 ………………………………………………………………67有名詞對照表…………………………………………………………69目錄1-1 固定電話與行動電話話務量比較………………………………11-2 3G用戶數成長趨勢 ……………………………………………21-3 行動電話用戶普及率 ………………………………………….31-4 行動電話用戶之貢獻………………………………………….32-1 3G / 3.5G 網路架構圖……………………………………… 62-2 OVSF編碼樹 ………………………………………………… 102-3 HSDPA編碼樹…………………………………………………. 112-4 UltraSite Node B 架構…………………………………… 122-5 Flexi Node B架構圖…………………………………………182-6 Flexi Node B示意圖…………………………………………192-7 T細胞群組,基地台組態為1+1+1 …………………………….292-8 T細胞群組,基地台組態為2+2+2 …………………………….302-9 共同控制的頻道分配於基站組態1+1+1配置兩片WSPCs…322-10 兩片WSPC下CCCHs以及16個AMR語音電話配置圖…332-11 混合式WSPx下CCCH配置圖……………………………….342-12 混合式WSPx下CCCHs、各種語音電話、數據服務配置圖…352-13 Flexi Node B共同控制通道分配圖…………………………373-1 網管報表的架構圖 ……………………………………………403-2 SHO Overhead計算範例………………………………………474-1 網路容量的設計流程 …………………………………………494-2 新增的用戶數量假設………………………………………….514-3 WSPC/CE估算流程圖 ……………………………………….564-4 HSDPA佔用無線資源示意圖…………………………………594-5 2nd Carriers估算流程圖……………………………………594-6 7.2Mbps開啟時所佔用之無線資源 …………………………604-7 傳輸E1數(理論值與實際值比較) ……………………………624-8 WSPC/CE數(理論值與實際值比較) …………………………634-9 2nd Carriers數(理論值與實際值比較)……………………64目錄2-1 調變與編碼率對照表 …………………………………………82-2 CQI與RLC Throughput對照表………………………………82-3 WSPA處理能力 ………………………………………………142-4 WSPC處理能力 ………………………………………………142-5 UltraSite Node(1+1+1) HSDPA處理能力……………………172-6 Flexi Node B(1+1+1)處理能力(3G語音與數據)……………202-7 Flexi Node B(1+1+1)處理能力(HSDPA) ……………………222-8 各種3G各種傳輸速率需要的CE數量………………………232-9 HSDPA的各種排程組態………………………………………262-10 伴隨HSDPA用戶而所需要的UL/DL DCH 的CE數量 …272-11 不同速率所對應的CE數量 …………………………………334-1 語音用戶分佈於3G基地台範例………………………………534-2 數據用戶分佈於3G基地台範例………………………………544-3 傳輸E1所對應的設計頻寬 ……………………………………554-4 單一站點傳輸E1範例…………………………………………554-5 各種服務所對應之CEs數量 …………………………………564-6 單一站點WSPC&CE範例……………………………………584-7 不同服務速率所對應的SF(展頻因子) ………………………594-8 單一站點2nd Carriers範例…………………………………611172294 bytesapplication/pdfen-US第二個載頻歐蘭高速下鏈封包接取正交化擴散因子通道元件2nd CarrierErlangHSDPAOVSFCE第三代行動通信基地台系統容量擴建之研究Study of 3rd generation Radio Acces Network Expansion in Node Bthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/188263/1/ntu-98-P95942008-1.pdf