or k N et w C or e C lo ud SingleSDB Solution Supporting VoWiFi +8613012345678 Challenges Poor Indoor Coverage Costly International Roamnig Subscribers in "radio tight" buildings have Subscribers have to pay costly international poor indoor signal coverage and roaming fees. unsatisfactory voice quality. USA China Sorry, insufficient $10 a minute for international calls balance. Expensive MVNO Leasing Fierce OTT Competition Mobile virtual network operators (MVNOs) Carriers are stuggling not to become have lease expenditures, restricting their dumb pipe providers. service development. Carrier Voice revenue 5.9% Consumers Virtual carriers Basic carriers Year 2013 2014 Source: MIIT Introduction The Voice over Wi-Fi (VoWiFi) service enables non-3GPP subscribers to use voice services over Wi-Fi connections. AAA USIM UE Convergent HLR/HSS LTE network Voice over Wi-Fi Benefits Carriers Improve subscriber loyalty by providing free international roaming services. Get back in the driver’s seat and turn things around. Greater competitiveness Improved satisfaction Enhanced coverage Lower lease expenditures Unified management Provide better indoor coverage than cellular macro base stations. Use a single interface to manage Wi-Fi subscribers on non-3GPP networks and LTE subscribers on 3GPP networks. Reduce MVNO network resource fees and accelerate service development. Subscribers Zero roaming fees Seamless call handovers Subscriber calls are handed over seamlessly between Wi-Fi and 3GPP networks. Roaming subscribers can make free phone calls over WiFi connections. VoWiFi Network Operations support layer Service layer SMSC ATS SCP E/Gd CAP Sh CAP BOSS ISC IMS Convergent HLR/HSS SOAP Nc C/D Cx SWx CS I/S-CSCF Mw AAA GMSC server MGCF E/P-CSCF S6b SWa SWm SGI S2b EPC Gx ePDG Non-3GPP access gateway MGW Rx S/P-GW PCRF S11 MME SWu Access layer Traffic channels Signaling channels Cloud server Handset AP/AC Technical Description VoWiFi Service USIM UEs access the ePDG through a Wi-Fi network. The ePDG is connected to the P-GW over the S2b interface where each user session is transported through a secure tunnel. The AAA server obtains authentication vectors from the convergent HLR/HSS and interworks with the ePDG to authenticate the UEs. The session border controller (SBC) obtains Radio Access Technology (RAT) Type over the Rx interface and compares it with Access-Type contained in the P-Access-Network-Info header field. If the UE uses the correct RAT, the SBC sends the processed P-Access-Network-Info header field to the IMS Core. The following figure shows the networking for USIM UEs accessing LTE networks through Wi-Fi connections. Convergent IMS-Core HLR/HSS SWx AAA SWm SBC S6b Rx EPC S2b UE Wi-Fi AP ePDG P-GW PCRF VoWiFi Multi-SIM Service The VoWiFi Multi-SIM service allows a subscriber who has multiple terminals using only one IMPU. The subscriber then can have all terminals register with an IMS network to use the VoWiFi service. The main and auxiliary terminals of a VoWiFi Multi-SIM subscriber can be registered with a network simultaneously, but only one terminal can be on a call. The VoWiFi Multi-SIM service provisioning procedure is as follows: Accepts the request and configures service data. 1 Service provisioning system 1. Requests the VoWiFi Multi-SIM service. Subscriber 3. Provisions service data to the ATS. SPG 2 3 4 4. Provisions the main card to the IMS-HSS and convergent HLR/SAE-HSS respectively. ATS 3 IMS 2. Provisions subscriber data to the convergent HLR/SAE-HSS. 5 Convergent HLR/SAE-HSS 5. Synchronizes subscriber data to the AAA server. AAA 2G/3G/4G IMS-HSS MSC server MME For more information, log in to http://support.huawei.com/carrier and choose Support >Product Support > Cloud core Network > Converged Data > SDM > HSS > SingleSDB >Product Documentation. Core Network Product Information Center Tech Support Cloud Core Network Documentation Department. Copyright © Huawei Technologies Co., Ltd. 2016. All rights reserved.
