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SIP-DECT 4.0

SIP-DECT 4.0. RFP 43 WLAN June 2012. Wireless LAN. Wireless LAN. WLAN Standards (Summary). 802.11i (2004) – additional WLAN security – AES, TKIP, EAP (base for WPA2) 802.11e (2005) – Medium Access Control(MAC) Quality of Service Enhancements – automatic power save delivery.

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SIP-DECT 4.0

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  1. SIP-DECT 4.0 RFP 43 WLAN June 2012

  2. Wireless LAN Wireless LAN

  3. WLAN Standards (Summary) • 802.11i (2004) • – additional WLAN security • – AES, TKIP, EAP (base for WPA2) • 802.11e (2005) • – Medium Access Control(MAC) • Quality of Service Enhancements • – automatic power save delivery • 802.11a (1999) – Physical Layer in 5 GHz band – data rate up to 54 Mbit/s using OFDM • 802.11b (1999) – data rate up to 11 Mbit/s using CCK / DSSS • 802.11g (2003) – Physical Layer in 2,4 GHz band – data rate up to 54 Mbit/s using OFDM – backward compatible to 802.11b • 802.11n (2009) – Physical Layer in 2,4 GHz and 5 GHz band – data rate up to 600 Mbit/s using OFDM / MIMO – backward compatible to 802.11b/g / 802.11a

  4. WLAN Applications • applications • healthcare • logistics • Internet / network • .... environments • hotels • hospitals • office buildings • production halls • .... • devices • laptops • PDAs • phones • ....

  5. WLAN Frequency (General) 2.4 GHz ISM (channels EMEA: 1-13, NA: 1-11) There are 3 overlap-free channels in 2.4 GHz ISM band (using 802.11b/g + n-HT20) e.g. 1 – 6 – 11. Each channel has a bandwidth of 22MHz. APs should always be 5 channels seperated from each other. 5 GHz ISM In 5 GHz all channels are overlapping free. The usage of certain channels is bound to regulatory requirements, Access Point capabilities (DFS, TPC) and indoor / outdoor usage.

  6. WLAN Frequency Planning For planning the channels for a base of a site-covering radio network, the distance between two base stations with the same frequency should be at least double that of the coverage. The coverage can be adjusted with the help of the Output Power Level parameters by 6% / 12% / 25% / 50% or 100%. HT40 (double channel) vs HT20 (single channel) Using the 802.11n HT40 mode two WLAN channels will be combined for more troughput. This reduce the number of non overlapping channels in 2.4 GHz frequency. primary (1) secondary 1 6 11

  7. WLAN 802.11n MIMO Using 802.11n, AccessPoints and clients (stations) can use multiple antennas to transmit or receive data on individual streams. Multiple Input Multiple Output (MIMO) allow higher data rates and provide better radio conditions as signals can be received by multiple antennas. maximal phy. data rates (Mbit/s) data rates vary on the radio environment and devices capabilites. The RFP43 support the 2x2 antenna modewith the maximal data rate of 300 Mbit/s

  8. WLAN Security = Authentification + Encryption • Authentification: • SSID – Service Set Identifier • Access filter e.g. MAC address filter, external radius server

  9. Server CertificatePrivate + Public Key EAP / 802.1x Authentification Master Secret CA CertificatePrivate + Public Key Client CertificatePrivate + Public Key Key CA CertificatePrivate + Public Key LAN Key Normal data traffic LAN WPA Authentification with a Radius Server Radius Server Access Point Authentification Station Normal data traffic WLAN | LAN

  10. VLAN 802.1q The RFP42 / 43 supports VLAN tagging (separation) for up to 4 WLANs and Voice data. e.g. for enabling the separation of different WLAN network‘sand the telephone network. WLAN Data Internet Data WLAN Data Data corporate LAN WLAN Data Data Switch Data WLAN Data RFP 42/43 Voice LAN VoIP (e.g untagged) DECT Voice

  11. WLAN Profile Configuration Create WLAN profiles which later can be assigned to the RFPs. Profiles have to be defined for RFP types e.g. RFP(L)42 or RFP(L)43 Service Set Identifier (SSID):Name / Description of this WLANVLAN tag: tag WLAN data to this VLAN and receive with this tag 802.11 mode: WLAN mode 802.11n prefered Hidden SSID mode: send no SSID in beacon packets

  12. WLAN Profile Configuration (2) Select the security type: open, WEP, WPA(2)-PSK, WPA(2)-802.1x

  13. WLAN Profile Configuration (3) Distribution interval: key exchange interval for WPA Radius Settings: IP address and Port of the Radius server and the secret to authenticate the basestation as radius client WME: Wireless Media Extentions (for QoS, required for 802.11n) Multiple SSID: one profile can have up to 4 different SSIDs Be aware that on RFP(L) 42 only SSID1 can be broadcast.All other SSIDs have to be known to the station as they are hidden SSIDs.

  14. RFP WLAN Configuration Assign the WLAN profile to your RFP’s (42 / 43). WLAN profile: ID of the WLAN profile (need to match RFP type) 802.11 channel: (selection depend on profile) 1-14 = 2,4 GHz 802.11b/g or 802.11n 36-48 = 5 GHz 802.11a or 802.11n Output power level: WLAN transmit power HT40: activate WLAN channel bundle for more troughput. In 2.4 GHz this reduce the number of overlapping free channels! Use only for single spots. The RFP(L) 43 can operate as WLAN Access Point and OMM at the same time.If the OMM reside on a RFP (L) 42 the WLAN function is disabled. The RFP type need to be known in the OMM to apply a WLAN Profile.e.g. RFP is connected or type is set by OMP

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