A method for configuring mapping relationships, comprising: configuring , by a network device, a first mapping relationship between a logical channel and a physical layer service identifier, or a second mapping relationship between a logical channel group and the physical layer service identifier, wherein the physical layer service identifier comprises content carried by the downlink control information; characterized in that , the method further comprises: configuring, by the network device, at least one set of aggregation factor parameters; an aggregation factor parameter representing times of transmitting uplink data repeatedly; sending, by the network device, the at least one set of aggregation factor parameters to a terminal; and configuring, by the network device, a third mapping relationship between the physical layer service identifier and an aggregation factor parameter in the at least one set of aggregation factor parameters; or configuring, by the network device, a fourth mapping relationship between a physical layer service identifier group and an aggregation factor parameter in the at least one set of aggregation factor parameters; wherein the physical layer service identifier group comprises at least one physical layer service identifier. configuring , by a network device, a first mapping relationship between a logical channel and a physical layer service identifier, or a second mapping relationship between a logical channel group and the physical layer service identifier, wherein the physical layer service identifier comprises content carried by the downlink control information; characterized in that , the method further comprises: configuring, by the network device, at least one set of aggregation factor parameters; an aggregation factor parameter representing times of transmitting uplink data repeatedly; sending, by the network device, the at least one set of aggregation factor parameters to a terminal; and configuring, by the network device, a third mapping relationship between the physical layer service identifier and an aggregation factor parameter in the at least one set of aggregation factor parameters; or configuring, by the network device, a fourth mapping relationship between a physical layer service identifier group and an aggregation factor parameter in the at least one set of aggregation factor parameters; wherein the physical layer service identifier group comprises at least one physical layer service identifier. configuring, by the network device, at least one set of aggregation factor parameters; an aggregation factor parameter representing times of transmitting uplink data repeatedly; sending, by the network device, the at least one set of aggregation factor parameters to a terminal; and configuring, by the network device, a third mapping relationship between the physical layer service identifier and an aggregation factor parameter in the at least one set of aggregation factor parameters; or configuring, by the network device, a fourth mapping relationship between a physical layer service identifier group and an aggregation factor parameter in the at least one set of aggregation factor parameters; wherein the physical layer service identifier group comprises at least one physical layer service identifier. <EOS>