電信認(rèn)證cdma原理基礎(chǔ)知識(shí)(1)(參考版)
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【正文】 ?移動(dòng)臺(tái)用導(dǎo)頻強(qiáng)度測(cè)量消息報(bào)告與當(dāng)前正在被解調(diào)的前向業(yè)務(wù)信道 (不管是否將繼續(xù)從其接收業(yè)務(wù) )相關(guān)的導(dǎo)頻的強(qiáng)度，以及相鄰導(dǎo)頻集和剩余導(dǎo)頻集里正在被接收的具有足夠強(qiáng)度，因此與其相關(guān)的 t業(yè)務(wù)信道能夠被成功解調(diào)的導(dǎo)頻的強(qiáng)度。 啟呼消息 尋呼響應(yīng)消息 Course 809 Lesson 5: Power Control, Registration, Handoffs Issue (January 1998) 25 受命登記和業(yè)務(wù)信道登記 ? 受命登記 ? 基站命令移動(dòng)臺(tái)登記 ? 移動(dòng)臺(tái)可以是在空閑狀態(tài)或處于呼叫狀態(tài) ? 業(yè)務(wù)信道登記 ? 當(dāng)移動(dòng)臺(tái)占用一個(gè)業(yè)務(wù)信道時(shí)，基站可獲得移動(dòng)臺(tái)的登記信息 ? 信息交換發(fā)生在業(yè)務(wù)信道上 ? 用于系統(tǒng)間切換 登記請(qǐng)求命令 (尋呼 /業(yè)務(wù)信道 ) 業(yè)務(wù)信道登記 (業(yè)務(wù)信道 ) Course 809 Lesson 5: Power Control, Registration, Handoffs Issue (January 1998) 26 CDMA概述 第五課：功率控制、登記和切換 5b: 登記 復(fù)習(xí) Course 809 Lesson 5: Power Control, Registration, Handoffs Issue (January 1998) 27 5b: Review Questions 1. Define the three roaming states in which a mobile station can be found. Home the mobile station is in its home location (not roaming), NID roaming the mobile station is within a foreign NID but in the home SID, and SID roaming the mobile station is within a foreign SID. 2. Define CDMA registration and explain its purpose. CDMA registration is the means by which a mobile station notifies the cellular system of its location, status, identification and other characteristics. The purpose of CDMA registration is to allow the system to efficiently page the mobile station when establishing a mobileterminated call. Course 809 Lesson 5: Power Control, Registration, Handoffs Issue (January 1998) 28 5b: Review Questions (cont) 3. Name the seven forms of registration, indicating whether they are autonomous or not. Autonomous: Powerup registration, Powerdown registration, Timerbased registration, Distancebased registration, and Zonebased registration. Nonautonomous: Parameterchange registration and Implicit registration. Course 809 Lesson 5: Power Control, Registration, Handoffs Issue (January 1998) 29 CDMA概述 第五課：功率控制、登記和切換 5c: 切換 Course 809 Lesson 5: Power Control, Registration, Handoffs Issue (January 1998) 30 5c: 切換 課程目標(biāo) ?說明切換的概念并明確它的三個(gè)階段 ? 比較 CDMA與 AMPS/TDMA切換 ? 明確不同類型的 CDMA切換 ? 說明移動(dòng)臺(tái)在空閑狀態(tài)和在業(yè)務(wù)信道狀態(tài)時(shí)的導(dǎo)頻集 ? 論述軟切換期間的功率控制 . Course 809 Lesson 5: Power Control, Registration, Handoffs Issue (January 1998) 31 切換 ? 切換就是當(dāng)移動(dòng)臺(tái)從一個(gè)基站的覆蓋范圍進(jìn)入另外一個(gè)基站的覆蓋范圍時(shí)移動(dòng)臺(tái)保持與移動(dòng)電話交換局 (MTSO)通信的過程。 then it refines this estimate through successive probes at increased power until it receives acknowledgment from the base station (or gives up). Course 809 Lesson 5: Power Control, Registration, Handoffs Issue (January 1998) 12 5a: Review Questions (cont) 4. What happens during Reverse Closed Loop Power Control? The mobile station corrects its output power level based on power up/powerdown mands received from the base station on the power control
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