The role of modeling and simulation in sizing military networks

Wong, Carolyn; Bradley, Malcolm

doi:10.1109/milcom.1996.569422

Cited by 2 publications

(1 citation statement)

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“…There is a reasonable consensus that OPNET is the communication modeling tool of choice for the military (Refs. 2,6,9,10,11,12). Moreover, because the Army uses multiple communication systems, including Single Channel Ground and Airborne Radio System (SINCGARS), Enhanced Position Location Reporting System (EPLRS), Mobile Subscriber Equipment (MSE), asynchronous transfer mode (ATM), and satellite communications that must interface into an efficient network of networks, simulation is required "early and often" as the title of a recent article in Signal (Ref.…”

Section: Introductionmentioning

confidence: 99%

Simulation model and studies of MIL-STD-188-220A [protocol]

Thuente

Borchelt²

IEEE Military Communications Conference. Proceedings. MILCOM 98 (Cat. No.98CH36201)

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A detailed model for the analysis and evaluation of many aspects of the protocol MIL-STD-1 88-220A has been built. This model has been used to develop important results about the pegormanee of MIL-STD-188-220A for various network configurations and message types and loads, The model includes detailed implementations in OPNET of many of the features of MIL-STD-188-220A including Type 1 and Type 2 services, deterministic adaptable priority network access delay (DAP-NAD) and radio embedded network access delay (RE-NAD) media access control algorithms, intranet topology with all appropriate updates, topology requests, and the transmission of all topology messages with the exact size and timing of the messages dictated by the protocol.Blocking of transmissions to individual nodes, either forced by obstructions or partial or total blocking forced by jamming, and intranet relaying using the topology routing tree graph have been implemented and used to obtain results. The model incorporates mobile receiver and transmitter nodes as well as fixed or mobile jammer nodes. The jammer nodes can have isotopic antennas or antennas with dB gains in cones with fixed direction pointing or dynamic direction pointing toward a target. Bit error rate (BER) and correction using the 24/12 Golay algorithm is eficiently modeled at the bit level.We have obtained some quite definitive results about which parts of the MIL-STD-188-220A protocol should be used under various network and message size and frequency configurations. These results should be very useful to the users and potential users of this protocol. Significant comparative results have been obtained as baselines for fire support and situation awareness type messages. We contrast the pegormanee of the networks for the media access control (MAC) algorithms DAP-NAD and RE-NAD for multiple small fire direction subnets and for larger single network configurations. The model has shown the efsects of blocking via physical obstructions or jamming on network performance.We have also demonstrated the ability of both DAP-NAD and RE-NAD to continue to eficiently operate on a disconnected network and to eventually reconnect the network when physically possible.

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Section: Introductionmentioning

confidence: 99%

Simulation model and studies of MIL-STD-188-220A [protocol]

Thuente

Borchelt²

IEEE Military Communications Conference. Proceedings. MILCOM 98 (Cat. No.98CH36201)

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Simulation studies of MAC algorithms for combat net radio

Thuente

Borchelt²

MILCOM 97 MILCOM 97 Proceedings

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The studies focus on the simulation of two media access control (MAC) algorithms in the MIL-STD-188-220A datalink layer protocol. The studies "pared and optimized the MAC algorithms for Type 2 service. The current simulation model is an extension of a model that had been verified and validated against our c0"Unicaton lab data. We have used this model to examine the performance of the Deter" 'stic Adaptable Priority Network Access Delay (DAP-NAD) algorithm for fue support message sets and for non-threaded, arbitrary size and destination, single message (called generic) loading of the networks. We have shown, for DAP-NAD, how network pexformance degrades as the number of subscribers on the network increases. We have also shown how the performance of the network is heavily dependent on the assignment of the transmit opportunity sequence (called subscriber numbers.) We have developed an algorithm for this assignment that improves the network performance. We have also used the simulation model to compare the performance of the Radio Embedded Network Access Delay (RE-NAD) and the DAP-NAD algorithms for both the fire mission sets and for generic message sets. We have shown for various scenarios where DAP-NAD is the preferred algorithm and also a situation where DAP-NAD is a very poor choice. It appears, in general, that DAP-NAD performs particularly well on stable networks with a moderate numbex of subscribers with the appropriate assignment of subscribes numbers. We note that most of the results are obtained from heavily loaded networks.Response t i m e on lightly loaded networks is of interest but is not as important for our applications.

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The role of modeling and simulation in sizing military networks

Cited by 2 publications

References 0 publications

Simulation model and studies of MIL-STD-188-220A [protocol]

Simulation model and studies of MIL-STD-188-220A [protocol]

Simulation studies of MAC algorithms for combat net radio

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