【文章內(nèi)容簡(jiǎn)介】 00 OK: CSCF響應(yīng) 200OK給 UE，來(lái)指示基本注冊(cè)成功。 ? 注意： PCSCF是 IMS的入口設(shè)備。 Page 15 Slide title :3235pt Color: R153 G0 B0 Corporate Font : FrutigerNext LT Medium Font to be used by customers and partners : Arial Slide text :2022pt Bullets level 25: 18pt Color:Black Corporate Font : FrutigerNext LT Medium Font to be used by customers and partners : Arial Top right corner for fieldmark， customer or partner logotypes. The following nine groups of colors are an example of how our design colors can be used， please take note that you should only use one design color group per slide. For specific usage details， refer to the “Typesetting Standard”. 實(shí)例 ? SIP基本注冊(cè)流程： Page 16 Slide title :3235pt Color: R153 G0 B0 Corporate Font : FrutigerNext LT Medium Font to be used by customers and partners : Arial Slide text :2022pt Bullets level 25: 18pt Color:Black Corporate Font : FrutigerNext LT Medium Font to be used by customers and partners : Arial Top right corner for fieldmark， customer or partner logotypes. The following nine groups of colors are an example of how our design colors can be used， please take note that you should only use one design color group per slide. For specific usage details， refer to the “Typesetting Standard”. 目錄 4 SRVCC 5 IP 短消息 6 附錄 1 概述 2 注冊(cè)流程 3 基本呼叫 Page 17 Slide title :3235pt Color: R153 G0 B0 Corporate Font : FrutigerNext LT Medium Font to be used by customers and partners : Arial Slide text :2022pt Bullets level 25: 18pt Color:Black Corporate Font : FrutigerNext LT Medium Font to be used by customers and partners : Arial Top right corner for fieldmark， customer or partner logotypes. The following nine groups of colors are an example of how our design colors can be used， please take note that you should only use one design color group per slide. For specific usage details， refer to the “Typesetting Standard”. 語(yǔ)音呼叫 ? 和 SIP注冊(cè)類似，VoLTE通話也需要使用 SIP消息來(lái)初始化 MO和 MT之間的會(huì)話； ? 中間的流程圖顯示了一個(gè) VoLTE基本呼叫的 SIP協(xié) 商流程圖； ? 右側(cè)列出了典型的SIP請(qǐng)求和響應(yīng)的用途 。 Invite： MO(主叫 )發(fā)起一個(gè) VoLTE呼叫，向 MT(被叫 )發(fā)送一條 Invite請(qǐng)求消息。 100 Trying： Invite請(qǐng)求的 臨時(shí)響應(yīng)消息 ，通常是MT(被叫 ) 或者 IMS用 來(lái)指示已經(jīng)正確收到了 Invite請(qǐng)求。 183 session progress： 該響應(yīng)用來(lái)指示 會(huì) 話正在處理中，一般是 precondition打開(kāi)時(shí)用來(lái)指示資源預(yù)留使用，由 MT(被叫 )或 IMS發(fā)送 。 PRACK： PRACK通常和 183消息成對(duì)出現(xiàn)，一般用來(lái) 指示 1xx響應(yīng)已經(jīng)正常收到 ，這里用來(lái)指示無(wú)線承載資源準(zhǔn)備就緒。 UPDATE： UPDATE用來(lái)協(xié)商 更新端到端的媒體面參數(shù) 等。 180 Ringing： 180振鈴消息用來(lái)指示被叫已經(jīng)振鈴。 200 OK： 200 OK通常是對(duì)某請(qǐng)求消息的確認(rèn) ，這里要關(guān)注最后一條，表示被叫已經(jīng)摘機(jī)。 Page 18 Slide title :3235pt Color: R153 G0 B0 Corporate Font : FrutigerNext LT Medium Font to be used by customers and partners : Arial Slide text :2022pt Bullets level 25: 18pt Color:Black Corporate Font : FrutigerNext LT Medium Font to be used by customers and partners : Arial Top right corner for fieldmark， customer or partner logotypes. The following nine groups of colors are an example of how our design colors can be used， please take note that you should only use one design color group per slide. For specific usage details， refer to the “Typesetting Standard”. 語(yǔ)音呼叫流程 ? 左 圖為 VoLTE基本呼叫的 MO到 PCSCF(IMS入口網(wǎng)元 )流程圖部分 . ? 呼 叫流程中包括 2類消息內(nèi)容： 一 類是 SIP消息；另一類是層 3消息，其中方框中的消息內(nèi)容為 QCI1的激活 過(guò)程 . ? QCI1激活流程由 183 session progress消息觸發(fā) . Page 19 Slide title :3235pt Color: R153 G0 B0 Corporate Font : FrutigerNext LT Medium Font to be used by customers and partners : Arial Slide text :2022pt Bullets level 25: 18pt Color:Black Corporate Font : FrutigerNext LT Medium Font to be used by customers and partners : Arial Top right corner for fieldmark， customer or partner logotypes. The following nine groups of colors are an example of how our design colors can be used， please take note that you should only use one design color group per slide. For specific usage details， refer to the “Typesetting Standard”. 呼叫時(shí)延 ? VoLTE呼叫中，呼叫事件是由 SIP消息來(lái)表征的， 例 如 180 Ring消息表示被叫振鈴， 200 OK表示被叫摘機(jī)，因此呼叫時(shí)延使用 SIP消息間隔來(lái)定義。 (1)主叫時(shí)延 : [Time(180) – Time(Invite)] (2)被叫時(shí)延 : [Time(Ack) – Time(200)] (3)E2E時(shí)延 :[Caller delay + Called delay] = [Time(180) – Time(Invite)] + [Time(Ack) – Time(200)] ? 主叫時(shí)延會(huì)受到振鈴類型的影響： (1)早振鈴 : 在 QCI1承載建立之前發(fā)送 180 Ring響應(yīng)。 (2)晚振鈴 :在 QCI1承載建立 之 后 發(fā) 送 180 Ring響應(yīng)。 Page 20 Slide title :3235pt Color: R153 G0 B0 Corporate Font : FrutigerNext LT Medium Font to be used by customers and partners : Arial Slide text :2022pt Bullets level 25: 18pt Color:Black Corporate Font : FrutigerNext LT Medium Font to be used by customers and partners : Arial Top right corner for fieldmark， customer or partner logotypes. The following nine groups of colors are an example of how our design colors can be used， please take note that you should only use one design color group per slide. For specific usage details， refer to the “Typesetting Standard”. 實(shí)例 ? 主叫 Signaling實(shí)例及關(guān)鍵信元： Page 21 Slide title :3235pt Color: R153 G0 B0 Corporate Font : FrutigerNext LT Medium Font to be used by customers and partners : Arial Slide text :2022pt Bullets level 25: 18pt Color:Black Corporate Font : FrutigerNext LT Medium Font to be used by customers and partners : Arial Top right corner for fieldmark， customer or partner logotypes. The following nine groups of colors are an example of how our design colors can be used， please take note that you should only use one d