A remote radio unit hub, RHUB, comprising: an input port module, a first output port module, a second output port module, and a processing module, wherein • the input port module is configured to connect to a baseband unit, BBU, in a wired manner and receive a first communications signal sent by the BBU; • the first output port module is configured to connect to another RHUB in a wired manner; • the processing module is configured to send, according to the first communications signal received by the input port module, a second communications signal to the another RHUB by using the first output port module; • the second output port module, wherein the second output port module is configured to connect to a remote radio unit, RRU, in a wired manner, wherein the second output port module comprises at least two second output ports; and the second output port module is specifically configured to connect to the RRU separately by using transmission links connected to the at least two second output ports, • wherein the processing module is specifically configured to: ∘ determine a network standard of the first communications signal received by the input port module; ∘ select, according to the network standard of the first communications signal and a preset correspondence between a network standard and the at least two second output ports, a second output port for outputting a third communications signal; and ∘ transmit the third communications signal to the RRU by using the selected second output port. • the input port module is configured to connect to a baseband unit, BBU, in a wired manner and receive a first communications signal sent by the BBU; • the first output port module is configured to connect to another RHUB in a wired manner; • the processing module is configured to send, according to the first communications signal received by the input port module, a second communications signal to the another RHUB by using the first output port module; • the second output port module, wherein the second output port module is configured to connect to a remote radio unit, RRU, in a wired manner, wherein the second output port module comprises at least two second output ports; and the second output port module is specifically configured to connect to the RRU separately by using transmission links connected to the at least two second output ports, • wherein the processing module is specifically configured to: ∘ determine a network standard of the first communications signal received by the input port module; ∘ select, according to the network standard of the first communications signal and a preset correspondence between a network standard and the at least two second output ports, a second output port for outputting a third communications signal; and ∘ transmit the third communications signal to the RRU by using the selected second output port. ∘ determine a network standard of the first communications signal received by the input port module; ∘ select, according to the network standard of the first communications signal and a preset correspondence between a network standard and the at least two second output ports, a second output port for outputting a third communications signal; and ∘ transmit the third communications signal to the RRU by using the selected second output port.