Documentation update

 This is a set of observations for the target class c-DenmTgt-BeaconCommon,

 where the trigger conditions for different observations are as follows.

   - @param Beacon-IntervalTooSmall: The difference between the generation time of two consecutive DENMs related to the 

 same traffic event (same actionId and detectionTime) transmitted by the same ITS station (same stationId) is 

   - @param Beacon-IntervalTooSmall: The difference between the generation time in the Header Info of two consecutive signed DENMs 

 related to the same traffic event (same actionId and detectionTime) transmitted by the same ITS station (same stationId) is 

 less than 80% of the minimum threshold value of the DENM repetition interval. This minimum threshold is set to 100 ms,

 considering the list of Day1 uses cases referenced in TS 103 759 table D.3 specified in C2C-CC Basic System Profile [[i.11]](#references)

 and C-Roads specifications [[i.12]](#references). The difference is calculated as the difference between the referenceTime in the second DENM and the

 referenceTime in the first DENM.

 and C-Roads specifications [[i.12]](#references). The difference is calculated as the difference between the generationTime in the second DENM and the

 generationTime in the first DENM.

```asn1

SetMbObsDenmBeacon C-ASR-SINGLE-OBS ::= {

  obs-Beacon-IntervalTooSmall,