rohc

about feedback

Asked by regulararmy

Hello Didier,

In two communication equipments A and B,each of them has Rohc entity (compressor and decompressor) , If a feedback channel is not defined (= decompressor is not associated with another local
compressor) in A, just did not configure a feedback channel for your
decompressors, However, B entity has configured a feedback channel .If so, when they communicate with each other, there should be some feedback datas between them, can they communicate with each other without abnormity? or some problems
will appear? can you give me a statement , thanks.

Regards,
cxs

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regulararmy (regulararmy) said : 		#1

Following the assumption above,
When testing in my lab, yes, the equipment A (a production, femto cell, make use of your rohc library codes) call the function 'rohc_decompress(...)' to decompress the feedback datas from B(TM500, like UE ) , is it right? if so , however, A can not process feedback datas successfully at all , the funciton always returns error, what can I do for it, please help me, Thank you.

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Didier Barvaux (didier-barvaux) said : 		#2

Hello,

Disabling feedback channel on one side only should work. The feedback will be ignored on the other side.

Regards,
Didier

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regulararmy (regulararmy) said : 		#3

Thanks Didier Barvaux, that solved my question.

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regulararmy (regulararmy) said : 		#4

"The feedback will be ignored on the other side.", what is the meaning of "ignored'? can you tell me which function should I call to process the feedback datas from other side?

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Didier Barvaux (didier-barvaux) said : 		#5

Ignored means discarded by decompressor. The decompressor discards any feedback bytes if no compressor is associated. Feedback bytes are handled by the rohc_decompress() function.

Regards,
Didier

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regulararmy (regulararmy) said : 		#6

Thanks