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时间:2010-07-20 23:46来源:蓝天飞行翻译 作者:admin
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NOT READY shall:
a) if the P(R) is greater than or equal to the hansfer
lower window edge, and less than or equal to the P(S)
to be assigned to the next data packet for transfer:
1) set the transfer lower window edge to equal P(R);
2) consider all unacknowledged data packets which
have been transferred with P(S) less than the new
value of the hansfer lower window edge as
acknowledged and delivered to the next centrc;
3) stop transferring data packets until a RECEIVE
READY is received or the logical channel
re-enters the flow control ready state;
b) if the P(R) is not greater than or equal to the transfer
lower window edge, and not less than or equal to the
P(S) to be assigned to the next data packet for hansfer:
1) execute the procedure for reset with the resetting
cause field indicating "local procedure error" and
the diagnostic code field indicating "invalid P(R)";
2) if the centre is a PVC transit centre for the PYC
assigned to the logical channel, execute the procedure
for reset on the corresponding logical channel
with the resetting cause field indicating "remote
procedure error" and the diagnostic code field
indicating "invalid P(R)".
8.6.6.2.6.9.3 A centre which receives a non-valid
RECEIVE NOT READY shall:
a) execute the procedure for reset, with the resetting
cause field indicating "local procedure error" and thc
appropriate diagnostic code;
b) if the centre is a PVC transit centre for the PVC
assiged to the logical channel, execute the procedure
for reset on the corresponding logical channel, with the
resetting cause field indicating "remote procedure
error'' and the appropriate diagnostic code.
8.6.6.2.6.10 Tran,rferring RECEIVE READY
8.6.6.2.6.10.1 A centre which was becoming temporarily
unable to accept further data packets and thus transferred one
or more RECEIVE NOT READYs, and which subsequently
has become able to accept further data packets, shall transfer
a RECEIVE READY with P(R) equal to the receive lower
window edge.
8.6.6.2.6.1 1 Receiving RECEIVE READY
8.6.6.2.6.11.1 A centre which receives a RECEIVE
READY on a logical channel which is not in the flow control
ready state shall discard the RECEIVE READY.
8.6.6.2.6.1 1.2 A centre which receives a valid RECEIVE
READY shall:
a) if the P(R) is greater than or equal to the transfer
lower window edge, and less than or equal to the P(S)
to be assigned to the next data packet for transfer:
1) set the transfer lower window edge to equal P(R);
2) consider all unacknowledged data packets which
have been transferred with P(S) less than the new
value of the transfer lower window edge as
acknowledged and delivered to the next centre;
3) resume transferring data packets;
b) if the P(R) is not greater than or equal to the transfer
lower window edge, and not less than or equal to the
P(Sj lo be assigned to the next data packet for transfer:
7/11/96
No. 71
Annex 10 - Aeronautical Telecommunications Volume III
1) execute the procedure for resct with the resetting 8.6.6.2.6.13.4 A centre which has changed the value of
cause field indicating "local procedure error" and the receive lower window edge, and which cannot send a data
the diagnostic code field indicating "invalid P(R)"; packet, and which is able to accept further data packets, shall
transfer a RECEIVE REAI)Y.
2) if the centre is a PVC transit centre for the PVC
assigned to the logical channel, execute the procedure
for reset on the corresponding logical channel
with the resetting cause field indicating "remote 8.6.6.2.7 PROCEDUREF OR RESET
procedure error'' and. the diagnostic code field
indicating "invalid P(R)". 8.6.6.2.7.1 The procedure for reset shall be used to
reinitialize a logical channel.
8.6.6.2.6.1 1.3 A centre which receives a non-valid
RECEIVE READY shall: 8.6.6.2.7.2 A centre shall not initiate the procedure for
reset when the logical channel is in the restart or unassigned
a) execute the procedure for reset, with the resetting state.
cause field indicating "local procedure error" and the
appropriate diagnostic code;
8.6.6.2.7.3 A centre shall initiate the procedure for reset
b) if the centre is a PVC transit centre for the PVC
assigned to the logical channel, execute the procedure
for reset on the corresponding logical channel, with the a) discard all packets waiting to be transferred or
resetting cause field indicating "remote procedure acknowledged on the logical channel:
error" and the appropriate diagnostic code.
 
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