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Class 1 BT compliance to EN 300 328v1.8.1

Fredrik Thorsell
Prodigy 10 points
Other Parts Discussed in Thread: WL1837MOD

My question is if any current Ti chip can be operated so that the new requirements in EN 300 328v1.8.1 can be met at 20 dBm output power.

The specific requirements that I’m concerned about is:

4.3.1.5 Medium Utilisation (MU) factor

and

4.3.1.6.1 Adaptive Frequency Hopping using LBT based DAA

or

4.3.1.6.2 Adaptive Frequency Hopping using other forms of DAA (non-LBT based)

The Medium Utilisation requirement can be met by keeping the duty cycle low. Does Ti have a method for controlling the duty cycle so that this requirement can be met at 20 dBm output power? (Under the assumption that the full baudrate is not required)

The Adaptive frequency hopping requirements are a bit more tricky. In order to pass these tests some sort of LBT or carrier sense need to be implemented. Does any Ti chip support these requirements? In the v4.0 of the BT standard an Adaptive frequency hopping mode is implemented but it is unclear to me if the implementation will manage the Adaptive frequency requirements as defined by EN 300 328v1.8.1. Does anyone have a take on this?

  • 0
    TI__Mastermind 32615 points

    Hi Fredrik,

    I hope you are referring to CC256x. If yes, CC256x don't support BT class1.

  • 0 in reply to Sundeep Javvaji
    Intellectual 610 points

    We should answer to following question nowadays to get a CE certificate:

    - The equipment can operate in more than one adaptive mode (yes/no)

    - The equipment has implemented a non-LBT based DAA mechanism  (yes/no)

    - The equipment has implemented an LBT based DAA mechanism (yes/no)

    --In case of equipment using modulation different from FHSS:

    --- The equipment is Frame Based equipment  (yes/no)

    --- The equipment is Load Based equipment  (yes/no)

    --- The equipment can switch dynamically between Frame Based and Load Based equipment  (yes/no)

    --- The CCA time implemented by the equipment:                      ........ µs

    These questions has to be answered. It does not matter what is the transmission power. Could you help us with these? I know that CC256x can change channel maps, but I don't know how channel mapping itself is implemented. 

  • 0 in reply to Juha O
    TI__Mastermind 32615 points

    Hi,

    Please see the inputs i have received internally.

    - The equipment can operate in more than one adaptive mode (yes/no)  

    --> No for BLE and  Not applicable for BT.

    - The equipment has implemented a non-LBT based DAA mechanism  (yes/no)

    --> Yes for BLE and Not applicable for BT.

    - The equipment has implemented an LBT based DAA mechanism (yes/no)

    --> No for BLE and No for BT.

    --In case of equipment using modulation different from FHSS:

    --- The equipment is Frame Based equipment  (yes/no)

    --> Yes for BLE and Not applicable for BT. 

    --- The equipment is Load Based equipment  (yes/no)

    --> No for BLE and Not applicable for BT. 

    --- The equipment can switch dynamically between Frame Based and Load Based equipment  (yes/no)

    --> No for BLE and Not applicable for BT. 

    --- The CCA time implemented by the equipment:                      ........ µs

    --> 400µs for BLE.

  • 0 in reply to Sundeep Javvaji
    Intellectual 610 points

    By the way what are the same values for BR/EDR ? We would need also them

  • 0 in reply to Juha O
    Intellectual 610 points

    http://processors.wiki.ti.com/images/5/50/ETSI_300_328_v181_AnnexE.pdf

    Are these values valid for cc256x in general?

  • 0 in reply to Juha O
    TI__Mastermind 32615 points

    Hi,

    Yes, only the BT and BLE fields.

  • 0 in reply to Sundeep Javvaji
    Prodigy 10 points
    Hi Sundeep,

    Could you please provide these answers for the WL1837MOD module? I see that the module is a Class-I device - the max Tx power level for BR mode is 11.7dBm, which is also greater than the 10dBm level beyond which EN 300 328v1.8.1 requires the device to implement a DAA mechanism.

    I need to know if the module implements an LBT or a non-LBT based DAA mechanism for Adaptive Frequency Hopping. More details on LBT and non-LBT DAA mechanisms are available in the ETSI EN 300 328v1.8.1 standard.
  • 0 in reply to Rohan Joginpalli
    TI__Mastermind 23565 points

    Rohan,


    For WL8 questions, please post them in WiLink WiFi + BT Forum: the e2e.ti.com/.../307

    ~Miguel