Description: pure ALOHA agreement under the agreement, as long as users have a frame, it will transmit out, conflict, will wait for a random period of time before re-issued. Therefore, the current frame, there are only two circumstances can this success : 1) the current frame only one to send, and the current frame before one-time frame sent; 2) the current frame only to send a (t this moment), but before a final of a transmission time not (t-FRAMETIME) ~ t this time. Other cases will have conflict. Conflict, to continue to disseminate the wrong frame, users re-sending frames, set a random number Rt, this frame added to the first Rt/FRAMETIME frames up, and established the time frame for the relative% FRAMETIME Rt. This is equivalent to that user for a random period of time after re-issued. For each
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