Vadim Yanitskiy 776c5b16ea lapdm: fix SAPI-0/SAPI-3 frame prioritization on DCCH ... According to 3GPP TS 44.005, section 4.2.2 "Priority": a) on DCCH, a SAPI=0 frame always has higher priority than SAPI=3; b) on ACCH, the priority arrangement is more complex: b1) if a SAPI = 3 frame is awaiting transmission, two SAPI=0 frames shall not be sent in consecutive SACCH frames; b2) on the network side (LAPDM_MODE_BTS), it must also be ensured that any SAPI=3 frame is followed by at least one SAPI=0 frame; b3) a SAPI = 0 frame may be repeated in the next SACCH period if the Repeated SACCH is supported (see 3GPP TS 44.006, section 11). We definitely need to extend our testing coverage to ensure that we implement b) correctly, but for now let's focus on DCCH: a) for DCCH, ensure that SAPI=0 frames preceed SAPI=3 ones; b) for ACCH, re-use the existing round-robin implementation. Change-Id: Ia3780bce1222b312ae2fd2d21496a4d6c5ccb6e0 Related: SYS#5047, OS#4731		2020-08-27 22:10:54 +07:00
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lapd_test.c	lapd_test: add a test checking SAPI0/SAPI3 prioritization	2020-08-27 20:40:17 +07:00
lapd_test.ok	lapdm: fix SAPI-0/SAPI-3 frame prioritization on DCCH	2020-08-27 22:10:54 +07:00