| 摘要 |
In a system in which the modulation scheme employed may change on a per-time - slot basis, a user's available data rate may change even if the user maintains th e same number of time slots, because the capacity of the user's time slots may change. If one or more such changes in modulation scheme occurs, the data rate available to th e user may no longer match his current data rate needs. Therefore, a method is disclose d for determining the number of time slots to assign to a user as a function of th e user's current data rate requirement and the actual current cumulative data rate of the tim e slots currently assigned to the user. The user data rate requirement may further b e a function of a quality of service (QoS) contracted for by the user. Thus, the assignment of the time slots within the frame is made dynamically and the number of time slots employed by a user is increased or decreased according to the user's current data rate requirements and the ability of the time slots already assigned to the user to meet those requirements.
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