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⟦5df56e24f⟧ Wang Wps File
Length: 6185 (0x1829)
Types: Wang Wps File
Notes: FIKS SYSTEM UPDATE (PROP)
Names: »5873A «
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PROPOSAL FOR
PROPOSAL FOR
PROPOSAL FOR
PROPOSAL FOR
PROPOSAL FOR
FIKS SYSTEM UPDATE:
FIKS SYSTEM UPDATE:
FIKS SYSTEM UPDATE:
FIKS SYSTEM UPDATE:
FIKS SYSTEM UPDATE:…06…1 …02… …02… …02… …02…
"SIGNALS FOR INTERCEPT"
"SIGNALS FOR INTERCEPT"
"SIGNALS FOR INTERCEPT"
"SIGNALS FOR INTERCEPT"
"SIGNALS FOR INTERCEPT"
S̲C̲O̲P̲E̲
This proposal provides a proposal for update of the
FIKS System concerning "Signals for Intercept", with
reference to AMC contract: FK. 8446 and AMC letter:
TST. 604.8228/312.1-635.
S̲O̲L̲U̲T̲I̲O̲N̲
When messages from NICS TARE are sent for intercept,
they are halted in the SCC waiting to be handled by
an operator. If the SCC goes STANDBY or the SCC-fails
(drops out of the FIKS network), then the intercepted
messages are stuck in the SCC, i.e. lost for the FIKS-network.
The situation is similar to that of messages sent to
internal conversion or to the NICS TARE. To overcome
this the following is proposed:
- Every message sent for intercept at the SCC shall
have a copy of it placed in the SIP-queues at the
collocated Node/MEDE. This implies that a copy
of an incoming intercepted NICS TARE-message must
be transferred to the SIP-queues. The CPM-process
shall, when it becomes aware of that an incoming
NICS TARE-message has been intercepted, see to
that a copy is distributed to the collocated Node/MEDE.
- The intercepted messages in the SIP-queues shall
be placed there until they are successful intercepted
and converted. (At present they are acknowledged
by the ISH-system, i.e. deleted from the SIP-queues,
at the moment they are sent for intercept). In
this way intercepted messages will be covered by
the reliability, that characterises the dual Node/MEDE-
design. The pseudo-acknowledge performed by the
CPM-
process at intercept of messages must be exchanged
with an "Intercept Notice". The SIP-queues must
be reorganized and expanded.
- The checkpointing concerned message-traffic at
the SCC-installation can be eliminated. Instead
all the messages in the SIP-queues shall be transferred
to the SCC for renewed conversion/intercept each
time the SCC goes ACTIVE. The SCC shall, when it
becomes STANDBY, clear all message queues. (To
avoid duplicate messages). SCC-restart/switchover
will not be needed. This will eliminate several
error cases raised, at SCC-restart. Implementation
of "Intercept Logging" will be much easier too.
- A procedure, which assures that the intercepted
messages are re-intercepted whatever happens, has
to be worked out.
A "real SIP-timeout" is proposed. In the existing
FIKS system, messages in the SIP-queues are sent
for distribution on the collocated Node/MEDE with
reason "SIP-timeout" when a certain number of conversions
has taken place. Instead the messages shall be
sent for distribution after a certain time limit
(shall be different with cases not-intercepted/intercepted
message). The "SIP-timeout"-message can be reentered
into the ISH-system either by the "DT-reenter"procedure
(to the collocated SCC) or by "Retransmission"-procedure
(to the opposite SSC). No messages can be stuck
or lost. The SPM-process shall be updated to handle
real SIP-timeout.
As a by-product of the proposed solutions the following
is obtained too. When identical messages (same message
ID's) are processed in the SCC, severe errors can occur
(MAC #42-error). This can be avoided by not letting
identical messages pass from the SIP-queues to the
SCC. This can now easily be performed. When a message
arrives to the SIP-queues, it is checked, if it exists
already - if so it is just deleted.
S̲O̲F̲T̲W̲A̲R̲E̲ ̲S̲P̲E̲C̲I̲F̲I̲C̲A̲T̲I̲O̲N̲
The solution is implemented by updating the following
software modules of the FIKS-system.
- CPM-process update
Implementation of "Intercept Notice",
Intercepted NICS TARE-message to collocated Node/MEDE.
- SPM-process update
Intercepted message handling,
Real SIP-timeout, new SIP-queue structure.
- Miscellaneous SCC-processes.
Removal of checkpointing.
- Expanded ISH-processing.
D̲E̲V̲E̲L̲O̲P̲M̲E̲N̲T̲,̲ ̲T̲E̲S̲T̲,̲ ̲D̲O̲C̲U̲M̲E̲N̲T̲A̲T̲I̲O̲N̲
Development (design and coding) and low level testing
will take place at CRAS, Ballerup. High level testing
will take place at the FIKS Test system at Vedb`k.
Occasionally employment of the operational SCC at Vedb`k
occurs.
A document containing the product specification for
the solution and a verification testprocedure will
be worked out and delivered to AMC. The needed update
of FIKS System document will be specified as DCN's
to the existing documents.
P̲R̲I̲C̲E̲ ̲B̲R̲E̲A̲K̲D̲O̲W̲N̲
Manpower consumption in weeks of 38.75 hours:
T̲a̲s̲k̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲M̲a̲n̲p̲o̲w̲e̲r̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲W̲e̲e̲k̲s̲
Design/Documentation E1
3
SW Coding/Unit Test E1
3
Integration/Verification E1
2
Secretary S1
1
Manpower Costs:
M̲a̲n̲p̲o̲w̲e̲r̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲W̲e̲e̲k̲s̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲P̲r̲i̲c̲e̲/̲H̲o̲u̲r̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲P̲r̲i̲c̲e̲
̲ ̲ ̲ ̲ ̲ ̲
E1 8 574 177,940.00
Kr.
S1 1 324 12,555.00
Kr.
̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲
̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲ ̲
Total 190,495.00
Kr.
E1: Senior Engineer S1: Secretary
V̲A̲L̲I̲D̲I̲T̲Y̲
Acceptance shall be performed before 31st May 1985.
D̲E̲L̲I̲V̲E̲R̲Y̲
Delivery will be performed in connection with implementation
of AMC contracts FK. 8510 and FK. 8512.
