Synchronization clocks for 4G (LTE) mobile networks

In 4G/LTE networks, just as in most other network types, interconnected network elements interwork correctly only if the signals they exchange comply with given synchronization quality requirements. The synchronization quality of the signals is determined by the network elements’ equipment clocks. Equipment clocks control some of the important signal processing functions within the network element (e.g. multiplexing, switching), as well as the data rate (accuracy, stability) of outgoing traffic signals. There are different clock frequency accuracy and stability requirements for different network element types.

With LTE, accurate frequency is often not enough, all equipment clocks of a given type are required to tick in phase throughout the network. The issue of clock synchronization is how to distribute a common frequency reference and possibly a common phase reference of appropriate quality to all clocks in the network. Network operators must design an appropriate synchronization network which guarantees that all equipment clocks operate within the relevant frequency (and possibly phase) accuracy and stability specifications. Before discussing how synchronization (frequency and possibly phase) is distributed to the equipment clocks, it is necessary to understand the synchronization performance requirements.

OSA 5401 Syncplug

Our OSA 5401 Syncplug™ is a highly accurate and uniquely effi cient small form-factor pluggable (SFP) grandmaster clock and Global Navigation Satellite System (GNSS) receiver, with the smallest footprint and most compact design on the market. It brings precise IEEE 1588v2 Precision Time Protocol (PTP) frequency and phase synchronization as well as Synchronous Ethernet deeper into access networks, including radio access and small cell networks.

OSA 5405 Series

For maximum benefits, small cells need tight synchronization. With our OSA 5405 SyncReachTM, this is easier than ever before. It features a unique dual antenna that enables it to deliver accurate and affordable small cell synchronization even in urban canyons.
A clear sky view is no longer essential for accurate and reliable GNSS-based synchronization. Our OSA 5405 can be deployed in deep urban canyons closer to where small cells are located. This avoids the archaic and expensive RF cable feeds of typical GNSS installations. Instead, the OSA 5405 uses costeffective Ethernet cabling and offers both electrical and optical interfaces. Our OSA 5405 comes in two variants:

  • the OSA 5405-O for outdoor installations on a wall or a pole;
  • and the OSA 5405-I for indoor

installations at windows or interior walls. Indoor- or outdoor-mounted, even at street level in deep urban canyons, our OSA 5405 offers unprecedented flexibility. And, with its dual GNSS receivers and PTP grandmaster, it delivers the accurate timing that small cells require.

OSA 5410 Series

Our OSA 5410 Series is a family of compact and cost-effective synchronization distribution and assurance devices that brings the power of Syncjack™ to any access network. The OSA 5410 Series offers unique flexibility by supporting delivery and assurance of synchronization utilizing Synchronous Ethernet and IEEE 1588v2 Precision Time Protocol (PTP). Thanks to its built-in Global Navigation Satellite System (GNSS) receiver and Grandmaster (GM) Clock capability, it can be used as a timing source for frequency, phase and time-of-day delivery, as well as a measurement reference for Syncjack™ tools.

OSA 5420 Series

Our OSA 5420 series is a family of cost-effective, mid-scale synchronization distribution and assurance devices that bring the power of Syncjack™ to any network. Following a toolbox approach, the family members of the OSA 5420 series can be utilized in a variety of network synchronization applications, including IEEE 1588v2 Grandmaster, Boundary Clock, Slave Clock and Assisted Partial Timing Support (APTS).

OSA 5430 Series

With our OSA 5430, a carrier-grade IEEE 1588v2 grandmaster clock supporting 10Gbit/s as well as 1Gbit/s interfaces with hardware timestamping, cost-effective and accurate synchronization distribution for next-generation technologies such as LTE-A is no longer a challenge. What’s more, its NTP server, multiple BITS outputs and GNSS receiver capabilities, make it also ideal for the smooth upgrade of legacy synchronization architectures.

OSA 5335 PTP Grandmaster

Our OSA 5335 Modular PTP Grandmaster is a scalable and high-performance IEEE 1588v2 standard compliant Grandmaster Clock for the distribution of frequency, phase and time synchronization over packet-based network infrastructure including IP/MPLS, Carrier Ethernet, PON and DSL networks.

OSA 5548C SSU

Our OSA 5548C Synchronization Supply Unit is a scalable synchronization solution rangingfrom 20 unprotected outputs up to 1,000 protected outputs by adding up to four expansion shelves to the core unit. Its ultra-compact footprint makes it ideal for telecom operators to provide scalable network synchronization in over-crowded exchanges.

FSP Network Manager and Sync Manager

Our FSP Network Manager is a user-friendly network management system that provides end-to-end configuration, management and surveillance of networks built from ADVA FSP and OSA network elements. The system offers reliable, secure and flexible access to any node on the network to ensure superior network availability and premium service levels. Service providers and enterprises use the FSP Network Manager to greatly simplify their Optical, Ethernet and synchronization network operations by streamlining the provisioning, monitoring and reporting processes in network operations.

SyncView Plus

SyncView™Plus is a comprehensive synchronization Management System that allows telecom operators to manage all Oscilloquartz synchronization elements from a single local RS-232 serial connection to one shelf up to hundreds of units from a single point via remote Ethernet connection.

0