Rxlev_Full & RxQual_Full : Measurements taken over full set of TDMA frames
Full set of TDMA frames : 102 for SDCCH
Full set of TDMA frames : 104 TCH
Rxlev_Sub & RxQual_Sub : Measurements taken over subset of TDMA frames
If even one frame is not transmitted in the measurement period, then it is considered as subset of TDMA frames.
Sub Measurements are done in these cases:
When DTX used, and the receiver enters the DTX mode , then the measurement is done over all the frames is not valid.
With DTX, if there is completely no speech for 480ms, then still there will be 8 frames of SID and 4 frames of SACCH, these 12 subset frames will be used for sub measurements .
DTX is not used on BCCH carrier (all timeslots) , hence if the call is on a TCH which is on a BCH carrier, then it will always be FULL, and in the measurement report both Sub and Full values will be same.
DTX is not used on the SDCCH also , hence the above clause applies to this also.
On a TCH carrier, when DTX was used by the BTS in the previous 480ms period, measurement is Sub, else it is full.
If Frequency Hopping was used, and BCH carrier was a part of it, and dowlink power control is used, then the measurements for Rx_Lev will always be sub ( since BCH carrier frames are not included in the measurement averaging)
If Frequency Hopping was used, and BCH carrier was a part of it, and dowlink power control is used, then the measurements for Rx_Lev will always be sub ( since BCH carrier frames are not included in the measurement averaging)
hi cocoloco,
from your post above, so if the call is located at hopping trx then the measurement should be in sub?
please explain...
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Originally Posted by cocoloco
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