Ultra wide band time slot reserving method for supporting channel multiplexing

The invention discloses an ultra wide band time slot reserving method for supporting channel multiplexing. The method mainly comprises the following steps of: (1) determining the quantity of media accessing time slots (MASs) to be reserved and reserved positions according to a data speed Vchannel and a service speed Vrequired of a sending service; (2) obtaining a bit mapping region of a distribution reserved protocol information element (DRP IE) in other successfully-reserved equipment beacon frames and dividing equipment with the same reserved MAS into the same alliance; (3) sequentially calculating all signal to interference ratios and values of characteristic functions of equipment after joining all the alliances, and through comparison, selecting the equipment to join in an alliance with the greatest characteristic function; (4) expanding reserved negotiation and broadcasting the DRP IE with a reserved scheme; (5) after the alliance receives a reserved request, calculating the change of a signal to interference ratio by each node, and responding the reserved request, wherein the change of the signal to interference ratio is caused by adding a new node; and (6) determining whether the reservation is successful or not by the node according to the responding of all the nodes in the alliance.