USN

The USN9810 is our proprietary unified serving node. It can be used in the 2.5G General Packet Radio Service (GPRS) system, 3G Universal Mobile Telecommunications System (UMTS), and evolved packet core (EPC) system.

The USN9810 integrates the serving GPRS support node (SGSN) and the mobility management entity (MME). It can provide functions of the SGSN, MME, or both, and is maintained using the same operation and maintenance system (OMS) regardless of the provided functions.

1.1 Features

Large capacity and high integration

The USN9810 uses a high-speed forwarding processor to forward data on the user plane, which improves the processing efficiency and system integration.

Advanced ATCA platform

The USN9810 uses the Open Standard Telecom Architecture (OSTA2.0) hardware platform, which is a server system featuring high density and high performance. The OSTA2.0 hardware platform enables the USN9810 to provide reliable data processing services for carrier-class telecommunications applications. A series of specifications related to boards, backplanes, and software for the next generation telecom devices are stipulated based on the OSTA2.0 hardware platform. The OSTA2.0 hardware platform is developed based on the ATCA standard architecture and conforms to the network equipment building system (NEBS) and European Telecommunications Standards Institute (ETSI) standards.

High reliability

Automatic backup of critical data

The USN9810 automatically backs up important data, such as configuration data, performance data, and operation logs.

Operation security

The USN9810 assigns different permission levels to different users and provides strict identity verification mechanisms. It also records operation details of users in operation logs, ensuring system security.

Hardware redundancy

All critical boards are configured to work in 1+1 backup mode to ensure high reliability of the system.

Fault protection

The USN9810 can protect the system if any of the following exceptions occurs:

  • System power off
  • Misoperation on the system power switch
  • Lightning surge on the system power
  • High voltage and low voltage
  • Short circuit of the power supply
  • Over-current and over-voltage for power modules and interfaces

Overload control

If CPU overload or resource congestion occurs, the USN9810 adjusts the traffic properly to prevent system breakdown.

Board and process lock and system shutdown

If necessary, board processes and ongoing services can be gradually ended to avoid abrupt service interruption.

1.2 Applications & Benefits

The flexible networking helps reduce the operational expenditure (OPEX) of operators.

  • The unified platform helps operators smoothly upgrade the network to reduce investment risks.
  • The high performance and high integration help operators prevent traffic storms of mobile broadband (MBB).

The high reliability helps operators easily cope with peak traffic.

Key Features Introduction

Smartphone Optimization Solution

The Smartphone Optimization solution identifies smartphones, optimizes the signaling behavior, ensures network security, and provides a platform with high performance and large capacity, helping operators minimize the impact of signaling storms.

Challenges

For the past several years, due to the increasingly popular use of smartphones such as iPhone, Blackberry, and HTC, MBB traffic has increased sharply. However, smartphones' signaling behavior differs from that of feature phones, and brings the following challenges to operators:

  • Networks are congested;
  • Network service quality deteriorates;
  • In some areas, subscribers frequently fail to access voice or data services.

Our Solution

An entire end-to-end solution is required to solve the challenges of traffic increase and signaling storms brought by the increased number of smartphones. As an end-to-end solution, our Smartphone Optimization solution provides a variety of measures, including identifying smartphones, optimizing smartphone signaling behavior, and constructing high-performance product architecture. The advantages of this solution are as follows:

High-performance and Large-capacity Platforms

  • High performance and reliability of the serving GPRS support node (SGSN) is ensured by using an industry-leading advanced telecom computing architecture (ATCA) platform;
  • The large throughput, high forwarding performance, and high reliability of the gateway GPRS support node (GGSN) is ensured by using the packet gateway platform (PGP);
  • Simple packets are forwarded quickly and complex packets are processed more efficiently because the SNP architecture used in this solution enables the system to process simple packets and complex packets separately.

High Reliability

High reliability is ensured by the protection mechanism against abnormalities. This protection mechanism can relieve smartphones' signaling impacts on the system in case of a signaling failure on a single node such as the authentication, authorization and accounting (AAA), dynamic host configuration protocol (DHCP), or online charging system (OCS) server. Therefore, the system is protected from breakdown due to single points of failure (SPOFs).

Smartphone Visualization

  • The system can identify smartphones by signaling behavior or by international mobile equipment identity (IMEI);
  • The system can provide a report on usage of signaling resources by smartphone;
  • The system supports terminal visualization;

The system can identify smartphone types and ensure end-to-end quality of service (QoS) for VIP subscribers.

Signaling Behavior Optimization

  • The system supports the smart direct tunnel policy and can disable the direct tunnel function for certain identified smartphones, relieving signaling impacts on the system;
  • The system supports resource control on smartphones by configuring various timers, improving user experience and relieving signaling load on the network side;
  • The system supports smart paging, that is, the system identifies services to be paged by deep packet inspection (DPI) and performs paging based on the predefined service priorities. When resources are insufficient on the radio access network, the system pages services according to the predefined service priorities, ensuring the user experience of high-value services on the condition of subscriber unawareness, and increasing operator revenue.
  • The system supports the abnormal signaling control. That is, the system inhibits smartphones from abnormally and repeatedly initiating activation procedures which place a heavy signaling load on networks, avoiding unnecessary capacity expansion and eliminating the impact of repeated signaling on networks.

Applications & Benefits

The Smartphone Optimization solution identifies smartphones, optimizes the signaling behavior, ensures network security, and provides a platform with high performance and large capacity, helping operators minimize the impact of signaling storms. The smartphone identification and signaling optimization functions help operators better understand the communications behavior of their subscribers and conditions of their networks, reduce the abnormal signaling load, and take precautions for the future network development.