/*
* rlc am test function rlc_am_reassemble_next_segment
* case 'if pdu_byte is not in [so .. so+len-1]'
* eNB sends SDU [1..30], not received
* eNB retx with smaller PDUs [1..21] [22..30], not received
* eNB retx with still smaller PDUs [1..11] [12..21] [22..30], not received
* custom PDU [12..21] sent to UE, received
* custom PDU [1..21] sent to UE, received
*
* Not sure if in a real setup [12..21] is sent and then [1..21] is sent.
* In the current RLC implementation, this is impossible. If we send [12..21]
* it means [1..21] has been split and so we won't sent it later on.
* Maybe with HARQ retransmissions in PHY/MAC in bad radio conditions?
*/
TIME, 1,
ENB_AM, 100000, 100000, 35, 0, 45, -1, -1, 4,
UE_AM, 100000, 100000, 35, 0, 45, -1, -1, 4,
UE_RECV_FAILS, 1,
ENB_RECV_FAILS, 1,
ENB_SDU, 0, 30,
TIME, 2,
ENB_PDU_SIZE, 25,
TIME, 48,
ENB_PDU_SIZE, 15,
TIME, 100,
UE_RECV_FAILS, 0,
ENB_RECV_FAILS, 0,
ENB_PDU, 14, 0xd8, 0x00, 0x00, 0x0b, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14,
TIME, 101,
ENB_PDU, 25, 0xe8, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14,
TIME, -1-
Cedric Roux authored
The necessity of SOstart/SOend was understood after email exchanges with David Breaux <davidbreaux67@gmail.com>. See openair2/LAYER2/rlc_v2/tests/test46.h for some details. Basically if we NACK without SOstart/SOend then the other end of the RLC channel will consider all the bytes as NACKed and will have to resend them all. If another status is then reported before all the bytes are sent, and because we don't use SOstart/SOend this status will NACK all the bytes again, then all the bytes are to be sent again. And the cycle repeats. It will end with a max retx reached (which triggers RLF, Radio Link Failure). The function put_bit in openair2/LAYER2/rlc_v2/rlc_pdu.c has been changed too, maybe introducing some performance issues.
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