A mobile communication system which comprising a plurality of mobile stations, a base station which is connected to said each mobile station through a radio link, and a switching center which is connected to said base station through a transmission link, said mobile communication system transmitting a forward data frame from said base station to said mobile station by using a forward radio frame which is constituted from a plurality of time slots, wherein said mobile communication system comprising:
- packet timing control means for determining a packet processing timing of said connection so as to equalize the connection number which is assigned to each timing that divides a packet period, when the connection is set between said switching center and said mobile station,
- packet transmission means for transmitting a packet of said connection in accordance with said packet processing timing between said switching center and said base station,
- radio frame timing control means for respectively setting a processing timing of said forward data frame so as to equally assign the head position of said forward data frame corresponding to said each connection to each time slot which constitutes said radio frame, on the basis of said packet processing timing, and
- radio frame transmission means for transmitting said forward radio frame which is generated in accordance with said processing timing.