Page 1279 - 5G Basics - Core Network Aspects

Transport aspects 2

R_BLOCK_TYPE = {C, S, T, D, E, M}

This function classifies each 66-bit rx_tcd vector as belonging to one of the six types depending on
its contents.
Values: C, S, T, and D are defined in clause 49.2.13.2.3 of [IEEE 802.3].
M: the vector contains a sync header of 10 and is recognized as a valid PCS lane alignment
marker by using the state machine shown in Figure F.3.
E: the vector does not meet the criteria for any other value.

R_TYPE(rx_tcd<65:0>)
Returns the R_BLOCK_TYPE of the rx_tcd<65:0> bit vector.

R_TYPE_NEXT
Prescient end of packet check function. It returns the R_BLOCK_TYPE of the rx_tcd vector
immediately following the current rx_tcd vector.
F.3.2.4 Counters

cnt
Count up to a maximum of p of the number of PCS lanes.

F.3.3 State diagrams
The receive state machine for a series of 513-bit blocks shown in Figure F.2 determines whether the 513-bit
block contains valid eight 66-bit blocks or not.

re
reset + 1027B_hi_ber + set + 1027B_hi_ber +
!1027B_block_lock1027B_block_lock
!
R R RX513B_INITX513B_INITX513B_INIT
POS_violation +S_violation +
rx rx PO
rx513_raw  8 x EBLOCK_T 513_raw  8 x EBLOCK_T 513_raw  8 x EBLOCK_T
s
seq_violation +eq_violation +
Mseq_violationeq_violation
Ms
!
!POS_violation *POS_violation *
! !seq_violation *seq_violation *
!
!Mseq_violationMseq_violation
V V V
R R
RX513B_VALIDX513B_VALIDX513B_VALID
!POS_violation *POS_violation * rx513_raw  DECODE(rx513_coded)513_raw  DECODE(rx513_coded)513_raw  DECODE(rx513_coded)
!
rx rx
!seq_violation *seq_violation * POS_violation +S_violation +
!
PO
! !Mseq_violationMseq_violation
s
seq_violation +eq_violation +
Mseq_violationeq_violation
Ms
R R
RX513B_INVALIDX513B_INVALIDX513B_INVALID
rx rx
rx513_raw  8 x EBLOCK_T513_raw  8 x EBLOCK_T513_raw  8 x EBLOCK_T
PO
seq_violation  Falseeq_violation  Falseeq_violation  False POS_violation +S_violation +
s s
Mseq_violation  Falseeq_violation  Falseeq_violation  False
Ms
s
Ms seq_violation +eq_violation +
Ms
!
!POS_violation *POS_violation * Mseq_violationeq_violation
! !seq_violation *seq_violation *
!Mseq_violationMseq_violation
!
V V V V
Figure F.2 – Receive state machine for the 512B/513B code blocks
including lane alignment markers
The trans-decode state machine for a series of 66-bit blocks shown in Figure F.3 checks the block type
sequence of recovered 66-bit blocks.
The PCS lane alignment marker state machine for a series of 66-bit blocks shown in Figure F.4 detects the
alignment markers every p  16384 blocks and checks whether the marker is in ascendant order or not.
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