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CSR Demonstrates True Single-Chip Wi-Fi at 3GSM

Simultaneous Bluetooth and VoIP Using CSR's UniFi-1 Silicon (February 10, 2006)

CSR is to demonstrate a Voice over Internet Protocol (VoIP) call using CSR's single-chip Wi-Fi silicon for consumer electronic devices, UniFi-1, while simultaneously co-existing with a Bluetooth HV3 connection to a headset at the 3GSM Congress at Barcelona. UniFi-1 and BlueCore4-ROM are embedded on a Wi-Fi / Bluetooth combination card, plugged into a PDA. This system will demonstrate the ease of voice calls over IP (VoIP) using a Session Initiation Protocol (SIP) client, via Wi-Fi connection from the PDA, to an access point terminating at a second SIP based user agent.

Using the SIP VoIP software, users of the two devices can speak freely and hear the conversation clearly, one user with the SIP user agent and the other using a Bluetooth headset paired with the PDA combination system.

The demonstration will show that UniFi, complete with UMA compliant 17dBm radio frequency output power, will not interfere with, or be disrupted by, the synchronous Bluetooth HV3 packets, providing a suitable quality of service end to end. CSR has optimised UniFi for this purpose and employs all commonly used frequency / time domain coexistence schemes for other 2.4GHz wireless standards.

The UniFi-1 product family, which started sampling at the end of 2004, has been designed specifically for easy integration into consumer electronic devices. The card features BlueCore4 ROM and UniFi-1 Portable, designed specifically for cellular phones and other pocket-sized devices. The single band (2.4GHz) 802.11b/g device features an exceptionally small chip-scale package, measuring only 6x6 m, which incorporates the RF, modem, baseband and hard MAC (media access controller) in a true single-chip format. The chip architecture itself, coupled with the lack of external components required, ensure that the UniFi silicon offers extremely low power consumption, a low bill of materials (BOM) and superior Wi-Fi performance.

"This is an opportunity to demonstrate to the general public a working VoIP Wi-Fi call with simultaneous co-existent Bluetooth utilising UniFi technology for Wi-Fi," commented Simon Finch, VP strategic marketing, CSR. "We believe that UniFi remains the world's smallest single-chip Wi-Fi product designed specifically for handheld devices such as mobile phones. Its tiny physical size and extremely low power consumption have effectively removed the barriers to mass market deployment of Wi-Fi in mobile devices."

About CSR

CSR plc is the leading global provider of Bluetooth technology and has developed expertise in other single-chip wireless communication standards such as Wi-Fi (IEEE802.11). CSR offers developed hardware/software solutions for Bluetooth based around BlueCore, a fully integrated 2.4 GHz radio, baseband and microcontroller.

CSR has now launched its fifth generation BlueCore suite and is in volume manufacture of its fourth generation BlueCore devices. BlueCore4 supports the Enhanced Data Rate (EDR) standard, which was ratified at the end of 2004. BlueCore4 remains the only EDR silicon to be shipping in volume today. In November 2004 CSR launched UniFi, the first single chip 802.11a/b/g embedded solution specifically targeting the mobile phone and consumer electronics markets.

BlueCore features in over 50 per cent of all Bluetooth devices shipped and over 60 per cent of all qualified Bluetooth enabled products and modules listed on the Bluetooth website with industry leaders including Nokia, Dell, Panasonic, Sharp, Motorola, IBM, Apple, NEC, Toshiba, RIM and Sony using BlueCore devices in their range of Bluetooth products.

In March 2005, CSR acquired Clarity Technologies Inc., for its Clear Voice Capture (CVC) technology that enhances the audio performance of any voice-based product or system. Applications for CVC include wireless headsets, handsets and automotive hands free systems.

In August 2005, CSR completed the acquisition of UbiNetics' software business, providing a strong R&D team to accelerate its existing software development in Bluetooth, Wi-Fi and UWB. The UbiNetics team gives CSR the capacity to extend its offering to mobile handset customers.

CSR has its headquarters and offices in Cambridge, UK, and offices in Japan, Korea, Taiwan, China, India, France, Denmark, Sweden and both Texas and Detroit in the USA.

More information can be found at and the partner web site

More information about Bluetooth technology can be found on the SIG web site at

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Related Keywords:csr, SIP VoIP software, single-chip Wi-Fi silicon , Bluetooth HV3


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