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Objectives At the end of this module the participant should be able to: - underline the structure of the Rel4 network - list the benefits of MSS concept - describe the separation of planes 4 Confidential CN34011EN17GLA0 © Nokia 2017 MSS System introduction Rel 4 network Underline the structure of the Rel 4 network (1/2) IN CAP, INAP, HLR MAP MAP-D HSS MAP MAP Cx Nc Mj, Mg (SIP-I, BICC CS2, ISUP) (SIP) BSSAP GSM MSS BSC MSS Mc (H.248) Iu-CS WCDMA 5 Confidential RNC Nb (H.248) PSTN/ISDN IP/TDM Backbone VoIP/IMS/SIP MGW MGW CN34011EN17GLA0 CSCF Mc, Mn © Nokia 2017 MSS System introduction Rel 4 network Underline the structure of the Rel 4 network (2/2) The MSS System consist of : The MSC Server (MSS) The MSS takes care of control plane tasks, such as user network signaling termination, mobility management, and Multimedia Gateway (MGW) control The Multimedia Gateway (MGW) The MGW handles user plane tasks, such as the actual switching and network interworking functions The Circuit Switched Data Server (CDS) The CDS is responsible for the interworking function in the MSS System, e.g. for CS data calls Note: The product configuration of the MSS can be divided into Pure MSS or Open Transit Routing Server (TRS) 6 Confidential CN34011EN17GLA0 © Nokia 2017 MSS System introduction MSS System List the benefit of MSS concept (1/4) The MSS System supports GSM, WCDMA and CS over HSPA circuit switched access technologies. It offers smooth roaming among different domains by offering the same services for all subscribers independent of the used radio access network. 7 Confidential CN34011EN17GLA0 © Nokia 2017 MSS System introduction MSS System List the benefit of MSS concept (2/4) The MSC Server System saves transmission costs by local switching when the call is managed by a single, local MGW. 8 Confidential CN34011EN17GLA0 © Nokia 2017 MSS System introduction MSS System List the benefit of MSS concept (3/4) The MSS System integrates safely into the existing network. The MSS System uses the same field-proven interfaces and protocols as the MSC System. MSC Server System MSC Traditional Mobile Switch Control & signaling Speech & Data MSC Server Media Gateway Control & signaling Speech & Data Defined by 3GPP (Release 4) 9 Confidential CN34011EN17GLA0 © Nokia 2017 MSS System introduction MSS System List the benefit of MSS concept (4/4) E.g. : An SMSC connection to an MSC server can use the same interfaces and protocols as SMSC connection to a traditional MSC. 10 Confidential CN34011EN17GLA0 © Nokia 2017 MSS System introduction Rel99 vs Rel4 Underline the separation of planes (1/4) MSC Server System separates call control & signaling and traffic into 2 separate network elements: MSC Server (MSS) Multimedia Gateway (MGW) MSC Server System MSC Traditional Mobile Switch Control & signaling Speech & Data MSC Server Media Gateway Control & signaling Speech & Data Defined by 3GPP (Release 4) 11 Confidential CN34011EN17GLA0 © Nokia 2017 MSS System introduction Rel99 vs Rel4 Underline the separation of planes (2/4) Separation of user plane and control plane enable the respective elements (MSS/MGW) to be located independently from each other This means that MSS can be concentrated on a few sites at the most convenient location, reducing the number of sites needed. MSC Server signaling ONLY!! A (IP/TDM) Iu CS (IP) 12 Confidential Media Gateway Only signaling between MSS and MGW Number&location of MSS site is independent of traffic Number of site can be reduced. MGW seldom require a site visit. MGW elements can be located to existing BSC/RNC sites No dedicated site required PSTN (TDM) CN34011EN17GLA0 © Nokia 2017 MSS System introduction Rel99 vs Rel4 Underline the separation of planes (3/4) In Nokia MSS network, the TDM point-to-point connection of MSC network can be replaced by Ethernet interface to the IP backbone. Traffic changes can be accommodated in the interface without modification and laborious configuration, familiar from TDM connection is also unnecessary. 13 Confidential CN34011EN17GLA0 © Nokia 2017 MSS System introduction Rel 4 network Underline the separation of planes (4/4) The Nokia MSS System offers a common IP and ATM network for 2G and 3G - CS and PS based subscriber traffic. Operators are free to choose the transportation layer technology used in their network (TDM, ATM, or IP). With the MGW for MSS, the operator can separate the control and user planes and select the preferred combination of the used transport protocols. The MSS System enables the use of a common transport network for both CS and PS core traffic. 14 Confidential CN34011EN17GLA0 © Nokia 2017 Confidential CN34011EN17GLA0 © Nokia 2017
