Channel rate adjusting method for packet data service of general mobile communication system

The invention discloses a channel rate adjustment method of moving communication system sectionalization data service, which comprises the following steps: measuring buffer area data bulk of wireless links inlay; deciding whether the buffer area data bulk is bigger than upper data threshold; adjusting the channel rate on the upper goal channel rate if the buffer area data bulk is bigger than upper data threshold; deciding whether the buffer area data bulk is smaller than downward datathreshold; adjusting the channel rate to downward goal channel rate, if the buffer area data bulk is smaller than downward datathreshold; going to check data bulk if buffer area data bulk isn't smaller than downward datathreshold. The invention reduces the signaling cost of current scheme, which improves the system resource availability.