Structure of traffic data in burst_ind messages

Bhaskar11 niceguy108 at gmail.com
Mon Jan 28 14:49:05 UTC 2013


I'm trying to decode TCH data using burst_ind. Below is info from the
frames as they come.

The SACCHs are correctly separated by 26 frames in the frame number so I
know the data is valid. I detect upload/download of frame by checking
(bi->flags & BI_FLG_SACCH).

But I see two problems:
1. Almost every alternate frame is missing.
2. I should not be seeing any upload frames, as I am not using
filter-rework.

Can you please guide me on what could be wrong?


Data received:

  TCH/H (hl=1, hu=1) in FN=379183 DL SACCH
  TCH/H (hl=0, hu=1) in FN=379183 UL SACCH
  TCH/H (hl=1, hu=1) in FN=379185 DL
  TCH/H (hl=1, hu=1) in FN=379185 UL
  TCH/H (hl=1, hu=1) in FN=379187 DL
  TCH/H (hl=0, hu=0) in FN=379187 UL
  TCH/H (hl=1, hu=0) in FN=379189 DL
  TCH/H (hl=0, hu=1) in FN=379189 UL
  TCH/H (hl=1, hu=1) in FN=379191 DL
  TCH/H (hl=0, hu=1) in FN=379191 UL
  TCH/H (hl=1, hu=1) in FN=379193 DL
  TCH/H (hl=0, hu=0) in FN=379193 UL
  TCH/H (hl=1, hu=1) in FN=379195 DL
  TCH/H (hl=0, hu=1) in FN=379195 UL
  TCH/H (hl=1, hu=1) in FN=379198 DL
  TCH/H (hl=1, hu=0) in FN=379198 UL
  TCH/H (hl=1, hu=1) in FN=379200 DL
  TCH/H (hl=0, hu=1) in FN=379200 UL
  TCH/H (hl=1, hu=1) in FN=379202 DL
  TCH/H (hl=1, hu=0) in FN=379202 UL
  TCH/H (hl=0, hu=0) in FN=379204 DL
  TCH/H (hl=1, hu=0) in FN=379204 UL
  TCH/H (hl=0, hu=0) in FN=379206 DL
  TCH/H (hl=1, hu=0) in FN=379206 UL
  TCH/H (hl=1, hu=1) in FN=379208 DL
  TCH/H (hl=0, hu=1) in FN=379208 UL
  TCH/H (hl=0, hu=0) in FN=379209 DL SACCH
  TCH/H (hl=1, hu=1) in FN=379209 UL SACCH
  TCH/H (hl=0, hu=0) in FN=379211 DL
  TCH/H (hl=1, hu=1) in FN=379211 UL
  TCH/H (hl=1, hu=1) in FN=379213 DL
  TCH/H (hl=0, hu=0) in FN=379213 UL
  TCH/H (hl=1, hu=1) in FN=379215 DL
  TCH/H (hl=0, hu=0) in FN=379215 UL
  TCH/H (hl=1, hu=1) in FN=379217 DL
  TCH/H (hl=1, hu=1) in FN=379217 UL
  TCH/H (hl=1, hu=1) in FN=379219 DL
  TCH/H (hl=0, hu=0) in FN=379219 UL
  TCH/H (hl=1, hu=1) in FN=379221 DL
  TCH/H (hl=0, hu=1) in FN=379221 UL
  TCH/H (hl=1, hu=1) in FN=379224 DL
  TCH/H (hl=1, hu=0) in FN=379224 UL
  TCH/H (hl=1, hu=1) in FN=379226 DL
  TCH/H (hl=1, hu=1) in FN=379226 UL
  TCH/H (hl=1, hu=1) in FN=379228 DL
  TCH/H (hl=1, hu=1) in FN=379228 UL
  TCH/H (hl=1, hu=1) in FN=379230 DL
  TCH/H (hl=1, hu=1) in FN=379230 UL
  TCH/H (hl=1, hu=1) in FN=379232 DL
  TCH/H (hl=1, hu=1) in FN=379232 UL
  TCH/H (hl=1, hu=1) in FN=379234 DL
  TCH/H (hl=0, hu=0) in FN=379234 UL
  TCH/H (hl=1, hu=1) in FN=379235 DL SACCH
  TCH/H (hl=0, hu=1) in FN=379235 UL SACCH
  TCH/H (hl=1, hu=1) in FN=379237 DL
  TCH/H (hl=1, hu=1) in FN=379237 UL
  TCH/H (hl=0, hu=0) in FN=379239 DL
  TCH/H (hl=1, hu=0) in FN=379239 UL
  TCH/H (hl=0, hu=0) in FN=379241 DL
  TCH/H (hl=1, hu=0) in FN=379241 UL
  TCH/H (hl=0, hu=0) in FN=379243 DL
  TCH/H (hl=0, hu=1) in FN=379243 UL
  TCH/H (hl=0, hu=0) in FN=379245 DL
  TCH/H (hl=0, hu=0) in FN=379245 UL
  TCH/H (hl=1, hu=1) in FN=379247 DL
  TCH/H (hl=0, hu=1) in FN=379247 UL
  TCH/H (hl=1, hu=1) in FN=379250 DL
  TCH/H (hl=0, hu=0) in FN=379250 UL
  TCH/H (hl=1, hu=1) in FN=379252 DL
  TCH/H (hl=1, hu=1) in FN=379252 UL
  TCH/H (hl=1, hu=1) in FN=379254 DL
  TCH/H (hl=1, hu=0) in FN=379254 UL
  TCH/H (hl=1, hu=1) in FN=379256 DL
  TCH/H (hl=1, hu=1) in FN=379256 UL
  TCH/H (hl=1, hu=1) in FN=379258 DL
  TCH/H (hl=1, hu=0) in FN=379258 UL
  TCH/H (hl=1, hu=1) in FN=379260 DL
  TCH/H (hl=0, hu=0) in FN=379260 UL
  TCH/H (hl=1, hu=1) in FN=379261 DL SACCH
  TCH/H (hl=1, hu=0) in FN=379261 UL SACCH
  TCH/H (hl=1, hu=1) in FN=379263 DL
  TCH/H (hl=0, hu=0) in FN=379263 UL
  TCH/H (hl=1, hu=1) in FN=379265 DL
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