We are pleased to announce that as of August 13, 2015, Qualcomm Global Trading Pte. Ltd., a subsidiary of Qualcomm Incorporated, has completed its acquisition of CSR plc. For more information, please see the press release .

CSR Positioning Centre™

The high-performance CSR Positioning Centre™ provides a wide array of carrier-grade position capabilities, engineered specially to satisfy mobile operators.

This solution extends CSR’s industry-leading satellite and terrestrial location capabilities to a broad range of devices by conforming to SUPL and emergency mandates.

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Protocols & Interfaces

Supported Protocols

  • SUPL 1.0 for GSM/UMTS
  • SUPL 2.0 for GSM/UMTS, LTE, CDMA and Wi-Fi
  • RRC, RRLP and LTE Positioning Protocol (LPP)
  • E911 for LTE: IMS interface with LTE Mobility Management Entity (MME)
  • CSR “CPR” protocol for integration with third party SMLC/SLC
  • IS-801-1 for CDMA

GPS Reference Data

  • CSR hosted GDC (GPS Data Centre)

Server Specifications

Supported Operating Systems

  • Redhat Linux

Server Hardware

  • Intel x86 platforms

Location Based Services (LBS) have widely varying requirements for accuracy that must be fulfilled within the constraints of the physical environment and device capabilities. For example, turn-by-turn navigation requires GPS-quality accuracy, but mobile social networks may not require such precision. Furthermore, indoor and dense urban locations reduce the efficacy of GPS and LBS, and thus demand complementary positioning techniques such as Wi-Fi and OTDOA.

The CSR Positioning Centre (CPC) offers a wide array of location techniques (such as AGPS, OTDOA, E-OTD, E-Cell ID, Wi-Fi) to mobile operators. CPC generates more robust location estimates for LTE handsets by combining ranging measurements from both 4G BTS and satellites, improving performance in urban canyons and outdoor/indoor transition zones. Wi-Fi positioning leverages the proliferation of Wi-Fi Access Points to improve LBS performance deep indoors.

CSR’s Matrix technology enables E-OTD location in unsynchronised GSM/UMTS networks, delivering results superior to that of “Enhanced Cell ID” without the deployment of costly Location Measurement Units (LMUs). Furthermore, Matrix reduces the LTE OTDOA error due to variations in BTS tower heights without the need for costly calibration.

The CPC can also serve non-data subscribers when integrated with third party SMLC/SAS nodes that provide GSM/UMTS control plane interfaces.

  • OMA SUPL Positioning Centre (SPC) Functionality
  • CSR hosted Global Reference Network (GRN) for GPS and GLONASS
  • Provides server based Wi-Fi positioning
  • Server based fusion of LTE OTDOA and GPS ranging measurements
  • Matrix technology eliminates need to calibrate LTE OTDOA for varying antenna tower heights
  • Matrix technology enables Observed Time Delay (OTD) positioning for GSM/UMTS without costly LMUs
  • Enhanced Cell ID (E-CID) using Timing Advance (TA) and Network Measurement Results (NMR)
  • Server based Wi-Fi positioning for SUPL 2.0 devices
  • Meets emergency mandates E911, E112 via 4G LTE location

Terms of Supply