LTE呼叫流程.ppt

Slide title 44 pt Text and bullet level 1 minimum 24 pt Bullets level 2-5 minimum 20 pt Characters for Embedded font:!#$%()*+,-./0123456789:;=?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~?￠￡¤￥|§¨?a???ˉ°±23′?·?1o???àá??????è?ìí??D?òó???×?ùú?üYT?àáa?????èéê?ìí??e?òó???÷?ùú?üyt?āā????????????ē????ěě??????īī???????????????ń???ňō????????????????????ūū?????????????????????ˇ?˙???????????–—‘’?“”????…‰???€?āā??????????????ēē????ěě??????īī?????????????????ōō????????????????ūū?????????????????≤≥?? ????????ΑΒΓΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥΦΧΨ???????αβγδεζηθικλνξορ?ΣΤΥΦΧΨΩ????? Ё?????????????АБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯАБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯЁ???????????????????????????????№ Do not add objects or text in the footer area Slide title 70 pt CAPITALS Slide subtitle minimum 30 pt LTE呼叫流程很详细 内容 数据呼叫流程 语音呼叫流程 数据呼叫流程 数据呼叫流程 UE eNodeB MME Serving GW PDN GW HSS Attach Request Initial UE(Attach Request) Update Location Request returns subscription data - default APN Create Session Req(APN) returns S-GW payload IP addr TEID UE IP address Create Session Req returns UE IP address Located in 数据呼叫流程 UE eNodeB MME Serving GW PDN GW HSS Initial Context Setup Req( S-GW IP addr and TEID, Attach Accept) returns eNB payload IP address and TEID Attach Accept(UE IP Address) Update Bearer Req( - eNB IP addr TEID) Located in 数据呼叫流程 UE eNodeB MME Serving GW PDN GW HSS Located in 此时UE处于EMM-REGISTERED 和ECM-CONNECTED状态 Default EPS Bearer 语音呼叫流程 基于LTE的语音呼叫方案 VoIP, 比如Skype IMS CS倒回 其他 CS 倒回概念 用户在移动中优先LTE接入，在LTE网络中无语音业务 (比如，未使用IMS) 当用户发起语音业务时，倒回到重叠覆盖的CS域 (2G/3G) 语音呼叫结束后，继续基于PS的LTE的接入 LTE LTE LTE LTE GSM/WCDMA LTE island PS CS (+PS) PS CS 倒回呼出流程 MSC-S GSM / WCDMA MSC-S MME SGSN eNodeB SGs S1 (A / Iu) NodeB RBS e-Uu Um / Uu LTE 1. UE呼出 4. UE倒回到GSM或者WCDMA系统 5. UE开始CS域的呼叫建立流程 2. eNodeB通过带有Redirect的RCC Connection Release消息，命令UE转移至GSM or WCDMA频点 SGW PGW GGSN S11 Gb / Iu 3. MME释放eNodeB中UE的上下文以及S-GW中有关eNodeB的信息 CS 倒回呼入流程 MSC-S GSM / WCDMA MSC-S MM