手機(jī)上網(wǎng)流程(存儲(chǔ)版)
【正文】 Corp.NetworkBSCGGSNBackbone FW FWApplicationserverDestination /source private IP addressesGGSN/FW public IP addressesGTP tunnel IPSec tunnel26漫游 － 連接到歸屬 ISPHome PLMN GGSNGGSNBGISP NetworkBGMS SGSNHLRVisiting PLMNRoamingMSReattachSubscriptiondata GTP addressingIPSectunnelhopbyhopSGSNMS27Home PLMN GGSNGGSNBG Home ISP NetworkBGMS SGSNHLRVisiting PLMNRoamingMSReattach Visiting ISP NetworkSGSNRADIUSRADIUSRoaming agreement between ISP’sMS漫游 － 連接到拜訪 ISP28Home PLMN GGSNGGSNMSBGMultiHomed ISP NetworkBGMS SGSNHLRVisiting PLMNRoamingMSReattachSGSNSame or different IP server address漫游 － 連接到多宿主 ISP29謝30總結(jié)l BTS就是基站發(fā)送接收電話信號(hào)， BSC是基站控制器，控制基站下發(fā)上傳屬于，并與核心網(wǎng)對(duì)接。 (NSAPI1 + PDP ctxt) ? (TID + of GGSN1)TLLI Activate_PDP_ctxt DNS_query (APN)DNS_response ( IP of GGSN1)DNSPDP上下文激活規(guī)程 (1)SGSNMS 處于準(zhǔn)備或就緒狀態(tài)19Create_PDP_context response (IP )TID1 ? IP ? current SGSNActivate_PDP_context_accept (IP )Create_PDP_context_req(type [+ of PDP] , APN, QoS) TLLI1 ? NSAPI + PDP
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