Serving Gateway

Mitel’s Serving Gateway (SGW) is 3GPP compliant Evolved Packet Core (EPC) network element, which manages user-plane mobility while functioning as the termination point of the packet data network interface towards EUTRAN.

With the rapid adoption of 4G LTE by mobile operators, the EPC is deployed widely and carrying significant volume of wireless internet traffic from 4G LTE devices.

Mitel’s proven leadership in Voice over LTE (VoLTE) and Rich Communication Services (RCS) brings its unique perspective on latency, QoS on the backhaul network and IP peering for next generation of communication services on 4G LTE networks.  Its virtualized EPC and all of its elements are optimally designed to transform LTE core network for user-to-user voice, video, messaging communication and real time media transfer type services. To execute this, Mitel’s SGW is architected with highly optimized packet processing capabilities in handling its functions such as user plane mobility anchoring, packet routing and forwarding.

As a network edge element, The SGW provides downlink packet buffering as part of mobility state management procedures to assist the eNodeB during inter-eNodeB handover (data forwarding). It also provides mobility anchoring for inter-3GPP mobility (terminating S4 and relaying the traffic between 2G/3G system and PDN GW). SGW essentially handles a lot of bearer data and signaling for GTP-Control. Mitel’s SGW has a distributed architecture that splits control and bearer planes, offering exceptional flexibility and scalability to handle high rates of such signaling and high PPS (packets per second).  The split architecture approach provides MNO’s the deployment flexibility to install geographically dispersed bearer plane and localize the bearer traffic with a centralized control plane.

The virtualized SGW, based on mOne® software platform, can easily be deployed in the operator’s cloud-based infrastructure. The mOne® Convergence Platform is field proven, modular, and carrier-grade, delivering the scale and flexibility needed to accommodate ever increasing volumes of 4G LTE voice and data traffic over mobile operator networks.

Key Features & Benefits

  •     Standards based, 3GPP Rel. 12 Compliant
    •         Local Mobility Anchor point for inter-eNodeB handover
    •         Mobility anchoring for inter-3GPP mobility
    •         Packet routing/forwarding, idle mode downlink packet buffering
    •         QoS support by transport level packet marking
  •     Fully Virtualized, ready for cloud based deployments
  •     Optimized packet processing, high throughput with per user QoS support
  •     “R4 for VoLTE” - IMS AGW/ATGW combined with S/P GW provides highly optimized VoLTE bearer path