SWRA670A April   2020  – October 2022 CC1350 , CC1352P , CC1352R , CC2400 , CC2420 , CC2430 , CC2500 , CC2520 , CC2530 , CC2538 , CC2540 , CC2541 , CC2543 , CC2544 , CC2545 , CC2564 , CC2590 , CC2591 , CC2592 , CC2620 , CC2630 , CC2640 , CC2650 , CC2652P , CC2652R , CC2652R7 , CC2652RSIP , CC3100 , CC3120 , CC3135 , CC3135MOD , CC3200 , CC3200MOD , CC3220MOD , CC3220MODA , CC3220R , CC3220S , CC3220SF , CC3230S , CC3230SF , CC3235MODAS , CC3235MODASF , CC3235MODS , CC3235MODSF , CC3235S , CC3235SF , WL1801MOD , WL1805MOD , WL1807MOD , WL1831

 

  1.   CE Regulations for SRDs Operating in License-Free 2.4 GHz/5 GHz Bands
  2.   Trademarks
  3. 1 Introduction
  4. 2 Regulation Overview
    1. 2.1 CEPT ERC Recommendation 70-03
  5. 3 Radio Equipment Directive (RED)
    1. 3.1 Essential Requirements
    2. 3.2 Obligations of Manufacturers
    3. 3.3 Conformity of Radio Equipment
      1. 3.3.1 Presumption of Conformity of Radio Equipment
      2. 3.3.2 Conformity Assessment Procedure
      3. 3.3.3 EU Declaration of Conformity
      4. 3.3.4 Rules and Conditions for Affixing the CE Marking
      5. 3.3.5 Technical Documentation
    4. 3.4 Restrictions on Putting into Service
  6. 4 ETSI EN 300 440
    1. 4.1 Technical Requirements
      1. 4.1.1 Environmental Profile
    2. 4.2 Transmitter Requirements
      1. 4.2.1 Transmitter Maximum Radiated Power (e.i.r.p.)
      2. 4.2.2 Permitted Range of Operating Frequencies
      3. 4.2.3 Unwanted Emissions in the Spurious Domain
      4. 4.2.4 Duty Cycle
      5. 4.2.5 Additional Requirements for FHSS Equipment
    3. 4.3 Receiver Requirements
      1. 4.3.1 Receiver Categories
      2. 4.3.2 Receiver Performance Criteria
      3. 4.3.3 Adjacent Channel Selectivity
      4. 4.3.4 Blocking or Desensitization
      5. 4.3.5 Spurious Radiations - Receiver
    4. 4.4 Spectrum Access Techniques
      1. 4.4.1 Listen Before Talk
        1. 4.4.1.1 LBT Timing Paramters
        2. 4.4.1.2 Receiver LBT Threshold and Transmitter Max On-Time
      2. 4.4.2 Detect And Avoid Technique (DAA)
  7. 5 ETSI EN 300 328
    1. 5.1 Technical Requirements
      1. 5.1.1 Environmental Profile
    2. 5.2 Equipment Types
      1. 5.2.1 Wideband Data Transmission Equipment Types
      2. 5.2.2 Adaptive and Non-Adaptive Equipment
      3. 5.2.3 Receiver Categories
      4. 5.2.4 Antenna Types
    3. 5.3 Conformance Requirements
      1. 5.3.1 Conformance Requirements for Frequency Hopping Equipment
        1. 5.3.1.1  RF Output Power
        2. 5.3.1.2  Duty Cycle
        3. 5.3.1.3  Accumulated Transit Time, Frequency Occupation and Hopping Sequence
        4. 5.3.1.4  Hopping Frequency Separation
        5. 5.3.1.5  Medium Utilization (MU) Factor
        6. 5.3.1.6  Adaptivity (Adaptive FHSS)
          1. 5.3.1.6.1 Adaptive FHSS Using LBT
          2. 5.3.1.6.2 Adaptive FHSS Using DAA
          3. 5.3.1.6.3 Adaptive FHSSS - Short Control Signaling Transmissions
        7. 5.3.1.7  Occupied Channel Bandwidth
        8. 5.3.1.8  Transmitter Unwanted Emissions in the Out-of-Band Domain
        9. 5.3.1.9  Transmitter Unwanted Emissions in the Spurious Domain
        10. 5.3.1.10 Receiver Spurious Emissions
        11. 5.3.1.11 Receiver Blocking
        12. 5.3.1.12 Geo-Location Capability
      2. 5.3.2 Conformance Requirements for Wideband Data Transmission Equipment (Non-FHSS)
        1. 5.3.2.1  RF Output Power
        2. 5.3.2.2  Power Spectral Density
        3. 5.3.2.3  Duty Cycle, Tx-sequence and Tx-gap
        4. 5.3.2.4  Medium Utilization Factor
        5. 5.3.2.5  Adaptivity (Non-FHSS)
          1. 5.3.2.5.1 Adaptive Non-FHSS using LBT
            1. 5.3.2.5.1.1 Frame Based Equipment
            2. 5.3.2.5.1.2 Load Based Equipment
          2. 5.3.2.5.2 Adaptive Non-FHSS Using DAA
          3. 5.3.2.5.3 Adaptive Non-FHSS - Short Control Signaling Transmissions
        6. 5.3.2.6  Occupied Channel Bandwidth
        7. 5.3.2.7  Transmitter Unwanted Emissions in the Out-of-Band Domain
        8. 5.3.2.8  74
        9. 5.3.2.9  Transmitter Unwanted Emissions in the Spurious Domain
        10. 5.3.2.10 Receiver Spurious Emissions
        11. 5.3.2.11 Receiving Blocking
        12. 5.3.2.12 Geo-Location Capability
  8. 6 ETSI EN 301 893
    1. 6.1 Technical Requirements
      1. 6.1.1 Environmental Profile
    2. 6.2 Conformance Requirements
      1. 6.2.1  Nominal Center Frequencies
      2. 6.2.2  Nominal Channel Bandwidth and Occupied Channel Bandwidth
      3. 6.2.3  RF Output Power, Transmit Power Control (TPC) and Power Density
      4. 6.2.4  Transmitter Unwanted Emissions - Outside the 5 GHz RLAN Bands
      5. 6.2.5  Transmitter Unwanted Emissions - Within 5 GHz RLAN Bands
      6. 6.2.6  Receiver Spurious Emissions
      7. 6.2.7  Dynamic Frequency Selection (DFS)
      8. 6.2.8  Adaptivity (Channel Access Mechanism)
        1. 6.2.8.1 Frame Based Equipment (FBE)
          1. 6.2.8.1.1 Initiating Device Channel Access Mechanism
          2. 6.2.8.1.2 Responding Device Channel Access Mechanism
        2. 6.2.8.2 Load Based Equipment (LBE)
          1. 6.2.8.2.1 Device Types - Load Based Equipment
          2. 6.2.8.2.2 Multi-Channel Operation - Load Based Equipment
          3. 6.2.8.2.3 Priority Classes - Load Based Equipment
          4. 6.2.8.2.4 ED Threshold Level - Load Based Equipment
          5. 6.2.8.2.5 Initiating Device Channel Access Mechanism - Load Based Equipment
          6. 6.2.8.2.6 Responding Device Channel Access Mechanism - Load Based Equipment
        3. 6.2.8.3 Short Control Signalling Transmissions (FBE and LBE)
      9. 6.2.9  Receiver Blocking
      10. 6.2.10 User Access Restrictions
      11. 6.2.11 Geo-Location Capability
  9. 7 ETSI EN 301 489
    1. 7.1 Technical Requirements
    2. 7.2 Environment Classification
    3. 7.3 Test Conditions
    4. 7.4 RF Exclusion Bands
    5. 7.5 Performance Assessment
      1. 7.5.1 Equipment Classification
    6. 7.6 Performance Criteria
      1. 7.6.1 Minimum Performance Level
    7. 7.7 Emission Requirements
      1. 7.7.1 Radiated Emissions - Enclosure Port
      2. 7.7.2 Conducted Emissions - DC Power Input/Output Ports
      3. 7.7.3 Conducted Emissions - AC Mains Power Input/Output Ports
      4. 7.7.4 Harmonic Current Emissions - AC Mains Power Input Port
      5. 7.7.5 Voltage Fluctuations and Flicker - AC Mains Power Input Port
      6. 7.7.6 Conducted Emissions - Wired Network Ports
    8. 7.8 Immunity Requirements
      1. 7.8.1 RF Electromagnetic Field (80 MHz to 6000 MHz) - Enclosure Port
      2. 7.8.2 Electrostatic Discharge - Enclosure
      3. 7.8.3 Fast Transients - Common Mode
      4. 7.8.4 RF - Common Mode
      5. 7.8.5 Transients and Surges in the Vehicular Environment
      6. 7.8.6 Voltage Dips and Interruptions
      7. 7.8.7 Surges
  10. 8 IEC 62368-1
    1. 8.1 Safety Requirements
  11. 9 EN 62311
    1. 9.1 Requirements and Limits of EN 62311
  12. 10References
  13. 11Revision History
6.2.8.2.5 Initiating Device Channel Access Mechanism - Load Based Equipment

Before a transmission or a burst of transmissions on an Operating Channel, the Initiating Device should operate at least one Channel Access Engine that executes the procedure described in the following steps 1 to step 8. This Channel Access Engine makes use of the parameters defined in Table 6-17 or Table 6-18 in Section 6.2.8.2.3.

A single Observation Slot should have a duration of not less than 9 μs.

An Initiating Device should operate at least one and no more than four different Channel Access Engines each with a different Priority Class as defined in Section 6.2.8.2.3:

  1. The Channel Access Engine should set CW to CWmin.
  2. The Channel Access Engine should select a random number q from a uniform distribution over the range 0 to CW. (1) in Table 6-17 defines an alternative range for q when the previous or next Channel Occupancy Time is greater than the maximum Channel Occupancy Time specified in Table 6-17.
  3. The Channel Access Engine should initiate a Prioritization Period as described in the following steps a) to c):
    1. The Channel Access Engine should set p according to the Priority Class associated with this Channel Access Engine. See Section 6.2.8.2.3.
    2. The Channel Access Engine should wait for a period of 16 μs.
    3. The Channel Access Engine should perform a Clear Channel Assessment (CCA) on the Operating Channel during a single Observation Slot:
      1. The Operating Channel should be considered occupied if other transmissions within this channel are detected with a level above the ED threshold defined in Section 6.2.8.2.4. In this case, the Channel Access Engine should initiate a new Prioritization Period starting with step 3a) after the energy within the channel has dropped below the ED threshold defined in Section 6.2.8.2.4.
      2. In case no energy within the Operating Channel is detected with a level above the ED threshold defined in Section 6.2.8.2.4, p may be decremented by not more than 1. If p is equal to 0, the Channel Access Engine should proceed with step 4, otherwise the Channel Access Engine should proceed with step 3c).
  4. The Channel Access Engine should perform a Backoff Procedure as described in step 4a) to step 4d):
    1. This step verifies if the Channel Access Engine satisfies the Post Backoff condition. If q < 0 and the Channel Access Engine is ready for a transmission, the Channel Access Engine should set CW equal to CWmin and should select a random number q from a uniform distribution over the range 0 to CW before proceeding with step 4b). (1) in Table 6-17 defines an alternative range for when the previous or next Channel Occupancy Time is greater than the maximum Channel Occupancy Time specified in Table 6-17.
    2. If q < 1 the Channel Access Engine should proceed with step 4d). Otherwise, the Channel Access Engine may decrement the value q by not more than 1 and the Channel Access Engine should proceed with step 4c).
    3. The Channel Access Engine should perform a Clear Channel Assessment (CCA) on the Operating Channel during a single Observation Slot:
      1. The Operating Channel should be considered occupied if energy was detected with a level above the ED threshold defined in Section 6.2.8.2.4. In this case, the Channel Access Engine should continue with step 3.
      2. If no energy was detected with a level above the ED threshold defined in Section 6.2.8.2.4, the Channel Access Engine should continue with step 4 b).
    4. If the Channel Access Engine is ready for a transmission the Channel Access Engine should continue with step 5. Otherwise, the Channel Access Engine should decrement the value q by 1 and the Channel Access Engine should proceed with step 4c). It should be understood that q can become negative and keep decrementing as long as the Channel Access Engine is not ready for a transmission.
  5. If only one Channel Access Engine of the Initiating Device is in this stage, the Channel Access Engine should proceed with step 6. If the Initiating Device has a multitude of Channel Access Engines in this stage, the Channel Access Engine with highest Priority Class in this multitude should proceed with step 6 and all other Channel Access Engines in the current stage should proceed with step 8.
    1. One Channel Access Engine of the Initiating Device is in this stage: This is equivalent to the equipment having no internal collision
    2. Initiating Device has a multitude of Channel Access Engines in this stage: This is equivalent to the equipment having one or more internal collisions
  6. The Channel Access Engine may start transmissions belonging to the corresponding or higher Priority Classes, on one or more Operating Channels. If the initiating device transmits in more than one Operating Channels, it should comply with the requirements contained in Section 6.2.8.2.2:
    1. The Channel Access Engine can have multiple transmissions without performing an additional CCA on this Operating Channel providing the gap in between such transmissions does not exceed 16 μs. Otherwise, if this gap exceeds 16 μs and does not exceed 25 μs, the Initiating Device may continue transmissions provided that no energy was detected with a level above the ED threshold defined in Section 6.2.8.2.4 for a duration of one Observation Slot.
    2. The Channel Access Engine may grant an authorization to transmit on the current Operating Channel to one or more Responding Devices. If the Initiating Device issues such a transmission grant to a Responding Device, the Responding Device should operate according to the procedure described in Section 6.2.8.2.6.
    3. The Initiating Device may have simultaneous transmissions of Priority Classes lower than the Priority Class of the Channel Access Engine, provided that the corresponding transmission duration (Channel Occupancy Time) is not extended beyond the time that is needed for the transmission(s) corresponding to the Priority Class of the Channel Access Engine.
  7. When the Channel Occupancy has completed, and it has been confirmed that at least one transmission that started at the beginning of the Channel Occupancy was successful, the Initiating Device proceeds with step 1 otherwise the Initiating Device proceeds with step 8.
  8. The Initiating Device may retransmit. If the Initiating Device does not retransmit the Channel Access Engine should discard all data packets associated with the unsuccessful Channel Occupancy and the Channel Access Engine should proceed with step 1. Otherwise, the Channel Access Engine should adjust CW to ((CW + 1) × m) - 1 with m ≥ 2. If the adjusted value of CW is greater than CWmax the Channel Access Engine may set CW equal to CWmax. The Channel Access Engine should proceed with step 2.

According to Section 6.2.8.2.3 where four different Priority Classes are defined, an Initiating Device should operate only one Channel Access Engine for each Priority Class implemented.

CW may take values that are greater than the values of CW in step 1 to step 8.