In order to get the rational configuration for the limited user multichannel sharing system, the M/M/n/n/m queuing model is applied. The formulas of loss probability and channel utilization ratio are derived. The MATLAB is adapted in the analysis of the system.
Channel utilization ratio of carrier sensing DCMA under fully connected network was theoretically investigated, and the throughput of carrier sensing DCMA under complex network topology was studied through software simulation.
the leaky bucket parameter and the statistical parameter of input traffic. Simulation with matlab indicates that QoS can be guaranteed by these two algorithms and the data service can get a high channel utilization ratio on the condition that the total service flow cannot exceed the value stipulated by the protocol.
We discuss in this paper several kinds of decentralized algorithm (protocols): ALOHA, Slotted-ALOHA, CSMA, Tree Algorithm, and Pretested Random Tree Algorithm. We put emphasis on the method of increasing channel throughput and of obtaining stability of the system.
In DCF mode of 802.11,severe asymmetry exists between downlink and uplink data flow in infrastructure BSS,because AP shows no advantage when accessing the share channel. Meanwhile the channel throughput will decreases with the increase of the number of competing STA.
From the point of view of the channel availability, this paper analyses and compares the each access protocols of bus type LAN, discusses the CSMA/CA protocol of OMNINET LAN and points out that it is the best method of contention common channel bus.
Experiments have been performed to measure the effectiveness of the priority system that use the mean access delay, throughput, and channel utilization as figures of merit.
The protocol also provides improved channel utilization with increasing high priority load, with no penalty in SP class performance at low to medium network loads.
This bound is then applied to the computation of the average channel utilization in a fully connected network with a large number of stations.
Simulation results show that M-EMAC outperforms EMAC in the wireless domain by improving channel utilization while reducing packet losses.
The channel utilization is examined analytically by introducing two capture models based on Rayleigh-distributed envelopes of the captured and the interfering frames divided into two local-mean power classes.