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FSM® Platform

Performance and integration for the next generation of femtocells

As subscribers increasingly expect wired performance from their wireless devices, the Qualcomm FSM® platform, a product of Qualcomm Technologies, Inc., meets these expectations and improves network economics for operators. The FSM platform offers unparalled levels of integration, power and interference management while extending the reach and capacity of cellular services. Qualcomm's solution includes the Femtocell Station Modem (FSM98XX) and Femtocell Transceiver (FTR86XX). It also offers baseband functions, network listen, power management and integrated RF capabilities for all major wireless bands.

Overview
Interference Management
Benefits
Technical Features

The unprecedented growth in mobile data consumption, driven by smart phones and other data intensive devices, highlights the need for improved coverage and increased data throughput for subscribers. More than 70% of mobile voice and data traffic is generated indoors (Informa 2008). Unfortunately, macro base stations are located outdoors. Providing coverage from the "outside in" can result in a poor end user experience. In a macro network, user experience can be affected by several factors:

  • Cell size
  • Users distance from the cell tower
  • Backhaul
  • Number of users
  • Traffic levels

Femtocells allow operators to target capex where it is needed by bringing the network access point closer to the mobile user. This enables a higher data connection and an improved user experience. Qualcomm's femtocell platform helps mobile operators stay competitive and respond to emerging technologies, while increasing coverage and the overall mobile network capacity with greater spectrum reuse for the operator. The Qualcomm platform will provide a flexible, fully integrated System on Chip (SoC) that allows equipment manufacturers and operators to deliver a best-in-class solution with the highest levels of integration and performance.

Increased interference is a concern when operators consider dense femtocell deployments to improve performance. Qualcomm has completed extensive performance analysis, simulations and field tests and developed innovative techniques to address the issue of interference management. These techniques and algorithms will ensure that the femtocell platform delivers a reliable user experience as a mobile phone moves from femtocell to macrocell.

Qualcomm is an active member of the Femto Forum and a key contributor to the Femto Forum white paper, Interference Management in UMTS Femtocells. As a result of research associated with this paper as well as extensive simulation and analysis done independently, Qualcomm has determined four key areas to successful interference management.

  • Autonomous carrier selection - Femtocell makes measurements on multiple carriers and assists network to select carrier with lowest interference level
  • Autonomous DL PSC selection - Femtocell transmit power adjusted to achieve desired signal quality at femtocell coverage edge,
  • Transmit power self-calibration - Femtocell scans all codes reserved for femtocells and selects the one that will cause the least interference with neighboring femtocells
  • Adaptive UL attenuation - This may be activated when the received signal strength exceeds a certain limit.
  • Provides a simple, well defined and low cost path to accelerate second generation 3G femtocell development
  • Extensive IOT with the leading CDMA2000® and UMTS terminal vendors
  • An end-to-end solution providing OEMs with a competitive advantage through early adoption of advanced MSM-enabled features
  • Leverages Qualcomm's extensive 3G system experience, including interference and mobility management
  • Provides a clear technology evolution roadmap
  • Highly Integrated Baseband SoC with RF Chipset
    • Complete 3G baseband and RF solution
    • Multi-channel transceiver IC for femtocell applications - supports up to 2 x 20MHz
    • Receive diversity and 2 x 2 MIMO
    • Hardware accelerators for backhaul/OTA encryption
    • Integrated GPS receiver
  • Integrated 1GHz Snapdragon ARM-based processor
    • Extensive APIs to develop higher layer control and data plane applications
    • Potential platform for future applications such as multimedia gateway, routing, etc.
  • Supports 3GPP HSPA+ and 3GPP2 DorA/DorB/1X standards with the same pinout and reference design
  • Network listen across global UMTS/GSM band
  • Residential and enterprise solutions