Abstract: This paper deals with the capacity of hybrid channel allocation(HCA) over CDMA network. Analyzing fixed channel and dynamic channel we obtained the substantive capacities and brought them into an inhibitable equation for channel allocation proportion. Based on the experiment it is validated that the system load would impact the inhibitable equation, that is, the certain load would make a corresponding proper allocation proportion. Finally the paper introduces the load estimate model in order to support producing the HCA proportion.

Key words: CDMA network, hybrid channel allocation, capacity, proportion