Method and apparatus for evaluating performance of wireless LAN system

A method for evaluating a performance of a wireless LAN system having a single access point and a plurality of transmission terminals, said access point and said transmission terminals sharing a same radio channel, said method comprising the steps of:

• dividing said plurality of transmission terminals into groups in accordance with radio conditions;
• an input device supplying a probability calculator with a number of the groups, a number of terminals in each group, a transmission rate of each group, an error rate for each group, and a system parameter;
• and
• the probability calculator calculating a transmission probability and a post-transmission failure probability for each group using the system parameter, the transmission rate of said each group, the error rate for said each group, and the number of terminals in said each group,
• wherein said input device comprises:
• a group number input unit for entering the number of said groups;
• a terminal number input unit for entering the number of terminals in said each group;
• an transmission rate input unit for entering the transmission rate for said each group;
• an error rate input unit for entering the error rate for said each group;
• and system parameter input unit for entering the system parameter.