An uplink transmission method for use in a beam-based communication system, the communication system comprising a network device and a user terminal, the method comprising: sending, by the network device, a quality criterion event of N beam pair links between the network device and the user terminal to the user terminal, with N being a positive integer greater than 1, wherein a quality criterion event of each beam pair link comprises at least one parameter; and receiving, by the network device, report information determined by the user terminal based on the quality criterion of the N beam pair links and the parameter of the quality criterion event of each beam pair link; wherein the method further comprises: configuring, by the network device, a quality criterion event for each of N beam pair links being used or monitored between the network device and the terminal; configuring, by the network device, a parameter M for the user terminal, wherein M is a positive integer less than or equal to N; receiving, by the network device, the report information from the user terminal when the quality criterion events of M or more beam pair links of the N beam pair links are triggered; wherein: the report information is a link recovery request; the parameter comprises an offset type parameter and a threshold type parameter, wherein the offset type parameter is a frequency-specific offset and/or a beam-specific offset to be added by the user terminal to a quality measured for a beam pair link. sending, by the network device, a quality criterion event of N beam pair links between the network device and the user terminal to the user terminal, with N being a positive integer greater than 1, wherein a quality criterion event of each beam pair link comprises at least one parameter; and receiving, by the network device, report information determined by the user terminal based on the quality criterion of the N beam pair links and the parameter of the quality criterion event of each beam pair link; wherein the method further comprises: configuring, by the network device, a quality criterion event for each of N beam pair links being used or monitored between the network device and the terminal; configuring, by the network device, a parameter M for the user terminal, wherein M is a positive integer less than or equal to N; receiving, by the network device, the report information from the user terminal when the quality criterion events of M or more beam pair links of the N beam pair links are triggered; wherein: the report information is a link recovery request; the parameter comprises an offset type parameter and a threshold type parameter, wherein the offset type parameter is a frequency-specific offset and/or a beam-specific offset to be added by the user terminal to a quality measured for a beam pair link. configuring, by the network device, a quality criterion event for each of N beam pair links being used or monitored between the network device and the terminal; configuring, by the network device, a parameter M for the user terminal, wherein M is a positive integer less than or equal to N; receiving, by the network device, the report information from the user terminal when the quality criterion events of M or more beam pair links of the N beam pair links are triggered; wherein: the report information is a link recovery request; the parameter comprises an offset type parameter and a threshold type parameter, wherein the offset type parameter is a frequency-specific offset and/or a beam-specific offset to be added by the user terminal to a quality measured for a beam pair link. the report information is a link recovery request; the parameter comprises an offset type parameter and a threshold type parameter, wherein the offset type parameter is a frequency-specific offset and/or a beam-specific offset to be added by the user terminal to a quality measured for a beam pair link.