Systems - 802.11n VoWiFi Reference Design

Systems - 802.11n VoWiFi Reference Design

Redpine’s RS9110-N-11-41 is a complete IEEE 802.11bgn VoWiFi phone reference design based on its RS9110-N-11-02 - industry’s leading ultra low power 802.11n module, and SiTel Semiconductor's SC14450 system- on-chip. The RS9110-N-11-02 is a complete IEEE 802.11bgn device, which is designed for mobile and handheld consumer applications, and it comes with an integrated MAC, baseband processor, RF transceiver and power amplifier. The SC14450 is a fully integrated DECT and VoIP device, featuring a compact RISC microcontroller for general processing, including power management and MMI functionality, and it is supplemented by two user-programmable Gen2DSPs for voice CODECs and audio processing, enabling color LCD Man Machine Interfaces (MMIs), text-to-speech, voice enhancement, animated JPEGs, Hi-Fi audio and advanced ring tones.

The RS9110-N-11-41 uClinux based VoWiFi reference design conforms to 802.11n draft 2.0, and it supports advanced power saving techniques including WMM-PS, packet classification and voice prioritization through 802.11e and WMM, advanced security through standard based WEP 64/128, WPA, and WPA2.


  • IEEE 802.11b/g/n standard support
  • WEP 64/128, WPA, WPA2 Personal, and Enterprise security modes
  • QoS support - 802.11e, and WMM
  • Support for automatic roaming
  • Advanced power save modes, and support for WMM-PS
  • Complete SIP stack
  • G.711, G.726, G.722, G.729 codec algorithms
  • Acoustic echo cancellation
  • Text-to-speech, voice enhancement, voice recognition, caller-id, Midi and MP3 ring tones
  • 160*128 TFT LCD with Backlight and 64k color support
  • WLAN signal strength indication
  • Low battery and charging indication
  • Mini-USB battery charging
  • Built-in speakerphone and headset connection
  • Benefits
  • Specifications
  • Software Package


  • Complete reference design including schematics, layout and BOM
  • Enables faster time-to-market for OEMs
  • Ultra-low power modes to enhance battery life time
  • Advanced QoS modes for guaranteed voice quality
  • OEMs can customize plastics, LCD and MMI


  • IEEE 802.11b/g/i/e single stream 802.11n, draft 802.11/k/r
  • 802.11n: 6.5, 13, 19.5, 26, 39, 52, 58.5, 65 Mbps
    802.11g: 6, 9, 12, 18, 24, 36, 48, 54 Mbps
    802.11b:1,2, 5.5,11 Mbps
  • OFDM with BPSK, QPSK, 16-QAM, and 64-QAM 802.11b with CCK and DSSS
  • USA - Channels 1 to 11
    Japan - Channels 1 to 14
    Europe - Channels 1 to 13
  • WMM and WMM Power Save Support
  • WMM - PS
  • 802.11i: AES, TKIP, WEP, WPA, and WPA2 802.1x Extended Authentication Protocol
  • Power save modes and WMM - PS Automatic roaming support Signal strength indication
  • SIP(RFC3261), SIP over UDP/RTP
  • G.711, G.726, G.722, G.729
  • TCP/IP, UDP, RTP, and DHCP
  • Numbers 0 through 9, *, # Navigation keys - left, right, up, down Enter, Accept and Reject keys, Audio, Phonebook keys
  • Mini-USB for battery charging
  • 40mm X 125.2mm
  • 95 gms

Software Package

The reference design for RS9110-N-11-41 comes with a complete VoWiFi software package along with the documentation to support the customization of the MMI.

  • UClinux based BSP and development tools
  • Complete SIP and TCP/IP stack
  • 802.11n draft 2.0 compliant WLAN driver
  • Sample MMI
  • Software integration and WLAN API document