WIRELESS COMMUNICATION SYSTEM FOR RELIABLE COMMUNICATION BETWEEN A GROUP OF APPARATUSES

摘要

The communication system allows a group of apparatuses, such as game computers and Personal Digital Assistants, to communicate wirelessly. A period following transmission of a message frame (500) is reserved for acknowledging reception. Receiving apparatuses (101, e.a.) wait a random time before acknowledging. Only the first apparatus (101) to time-out transmits an acknowledgment frame (510). An apparatus (100, e.a.) comprises detection means (400) for detecting a frame transmission, which is followed by first timing means (310) setting a first timer at a first time. Message sending means (200) transmits a message frame (500) when the first timer is expired. Following reception of the message frame (500) by message receiving means (210), second timing (320) means sets a second timer at a random time, which is smaller than the first time. Acknowledge sending means (220) transmits an acknowledgment frame (510) if the second timer expires prior to detecting another transmission.