Laserfiche WebLink
Redwooc� City Police <br /> Department System Performance <br /> � MDD RF RNC 3000 HOST <br /> ACK ,I,X gosc <br /> (!2 Outbound p�. <br /> ______-� <br /> M�S� Ouibouod• Tiaosmit Process ' RNC laput <br /> Q� (10) �9� <br /> (13) (11} . <br /> inbound ACK <br /> Schalulin8 Outbound ACK M�S� <br /> (7) Schcdulin Packeti�arion �g� <br /> (Z) 3 <br /> el Inbound <br /> ccess - <br /> RF lapnt 8c Dehy � RNC Output Oudwuad <br /> �4� �5� �� M�B� <br /> (1) Inbound Message <br /> O=Messagt Geneiatnr D�MessaBe Queue Simulated Not Simulated <br /> A brief description of the message blocks follows. <br /> (1) Input Message Generator-Messages aze generated from the <br /> simulated population of terminals by this block. The generation <br /> rate is established by the message model and the interarrival times <br /> are drawn from a Poissan distribution. _ <br /> � <br /> (2) Terminai Channel Access-The logic involved in this block <br /> accounts for the Slatted Digital Sense Multiple Access scheme <br /> described above. This block also waits for acknowledgment from <br /> the RNC indicating that the message was received and forwarded. <br /> to the application server. This block can account for messages not <br /> being received at the RNC,in which case a retransmission is <br /> initiated. Finally,this block can account for the collisions that <br /> occur when two Mobile Data Terminals transmit at the same time _ <br /> and the random time interval that is initiated before retransmission. <br /> (3) Inbound Channel Facility-'I'he inbound channel is modeled as <br /> a facility that can be used by the message transactions. This <br /> fa�eility is"flagged"as busy for the duration of an inbound message <br /> in accordance with SDSMA. Additionally,the message <br /> � transmissions are corrupted based on the�F propagation <br /> parameters used in the calculation ofthe coverage maps. <br /> (4) RNC Holding Pen and RF InPut Queue- Tllese two blocks <br /> model the RNC's holding pen and queue for transmissions received <br /> from the RF channel_ In a multi-site system such as this,the RNC <br /> � <br /> QMOTOROLA • 3 �'6 <br /> . _. _ _ __ _. __ . _ <br />