An information processing method, applied to an information processing device, wherein the method comprises: obtaining first dedicated channel, DCH, user quantities, first power, and first adaptive multi-rate, AMR, traffic volumes, being an Erlang number of an AMR speech service in a cell, that respectively correspond to a plurality of phase groups, wherein the phase group comprises a first phase value and a second phase value, the first phase value and the second phase value are used to adjust phases of different transmission channels, a first DCH user quantity corresponding to a target phase group is a user quantity obtained based on first data that is in a first period, the target phase group is any one of the plurality of phase groups, the first period is a period next to a period in which the target phase group is determined as a first phase group, the first data in the first period is a sum of DCH user quantities that are collected in the first period and are of cells in a first common coverage area, the first power is power obtained based on a difference between second data and third data that are in the first period, the second data in the first period is a sum of non-high-speed downlink packet access power that is collected in the first period and is of the cells in the first common coverage area, the third data in the first period is a sum of common channel power that is collected in the first period and is of the cells in the first common coverage area, the first AMR traffic volume is a traffic volume obtained based on fourth data that is in the first period, and the fourth data in the first period is a sum of AMR traffic volumes that are collected in the first period and are of the cells in the first common coverage area; obtaining a target value corresponding to each of the plurality of phase groups through calculation based on the first DCH user quantities, the first power, and the first AMR traffic volumes that respectively correspond to the plurality of phase groups, wherein the target value is used to represent a system capacity; determining, based on the target value, the first phase group in the plurality of phase groups; and sending the first phase group to an access network device, wherein the first phase group is used by the access network device to adjust the phase of the transmission channel by using the first phase group in a current period. obtaining first dedicated channel, DCH, user quantities, first power, and first adaptive multi-rate, AMR, traffic volumes, being an Erlang number of an AMR speech service in a cell, that respectively correspond to a plurality of phase groups, wherein the phase group comprises a first phase value and a second phase value, the first phase value and the second phase value are used to adjust phases of different transmission channels, a first DCH user quantity corresponding to a target phase group is a user quantity obtained based on first data that is in a first period, the target phase group is any one of the plurality of phase groups, the first period is a period next to a period in which the target phase group is determined as a first phase group, the first data in the first period is a sum of DCH user quantities that are collected in the first period and are of cells in a first common coverage area, the first power is power obtained based on a difference between second data and third data that are in the first period, the second data in the first period is a sum of non-high-speed downlink packet access power that is collected in the first period and is of the cells in the first common coverage area, the third data in the first period is a sum of common channel power that is collected in the first period and is of the cells in the first common coverage area, the first AMR traffic volume is a traffic volume obtained based on fourth data that is in the first period, and the fourth data in the first period is a sum of AMR traffic volumes that are collected in the first period and are of the cells in the first common coverage area; obtaining a target value corresponding to each of the plurality of phase groups through calculation based on the first DCH user quantities, the first power, and the first AMR traffic volumes that respectively correspond to the plurality of phase groups, wherein the target value is used to represent a system capacity; determining, based on the target value, the first phase group in the plurality of phase groups; and sending the first phase group to an access network device, wherein the first phase group is used by the access network device to adjust the phase of the transmission channel by using the first phase group in a current period.