Re: [Openbts-discuss] how to know a burst is belong to MAC/RLC control block or MAC/RLC data block

[Sylvain M. <24...@gm...>]

Hi,

> I want to know how to know GPRS channel coding. GPRS using PDCH, both
> MAC/RLC data block and MAC/RLC control block is
> transmitted on PDCH,  although there is PACCH, PTCH, PTCCH and so on it
> still PDCH. then the MAC/RLC control block is coded
> with cs-1 channel coding scheme and MAC/RLC data block may be coded with
> other channel coding scheme. so when received a
> burst how to know what kind of MAC/RLC block it belong to and which channel
> coding scheme it used?\

Read GSM 05.03 again, In the "Mapping on a burst" subsection of each
of the "Packet data block type X (CS-X)" for CS2,3,4, there is a
special marker in the burst. While CS-1 itself is identified with both
stealing flags being at one.

Cheers,

    Sylvain