A method of allocating network medium data resources is disclosed. The method is performed at an apparatus having one or more processors and memory for storing programs to be executed by the one or more processors. The method includes selecting, from a set of virtual requests, a virtual request including a requested resource usage time range consisting of multiple unit time periods. The method includes identifying a set of requests conflicting with the selected virtual request, where the set of conflicting requests includes one virtual request and one actual request. The method includes calculating, based on the set of conflicting requests, a maximum allocatable resource volume for each unit time period within the requested resource usage time range. The method further includes determining, based on the maximum allocatable resource volumes and the selected virtual request, an allocatable resource volume for each unit time period within the requested resource usage time.