Mobile cellular network based on layered cloud computing

A downlink divergence method in a cloud computing system, wherein the cloud computing system comprises:

• at least one cloud radio gateway (CRG) node, at least one macro cloud (MC) node and at least one distributive unit (DU) node, the at least one CRG node is located at the top layer in a core network of a mobile cellular network, the at least one MC node and the at least one DU node are located in an access network of the mobile cellular network, the at least one CRG node, the at least one MC node and the at least one DU node are all capable of performing cloud computing, the at least one DU node is located in coverage of the at least one MC node, and the at least one MC node is located in coverage of the at least one CRG node, the method comprising:
• receiving, by the at least one CRG node, network data from a public data network (PDN)/public switched telephone network (PSTN);
• allocating, by the at least one CRG node, the received network data to one node of the at least one CRG node, the at least one MC node, the at least one DU node, and another CRG node in the core network, or allocating the received network data to multiple nodes of the at least one CRG node, the at least one MC node, the at least one DU node and the other CRG node;
• performing, by the one node or multiple nodes receiving the allocated network data, signal processing of an air interface protocol stack on the allocated network data, to generate a downlink baseband signal;
• and
• translating, by the at least one MC node or the at least one DU node respectively, the generated downlink baseband signal to a RF signal and sending to a user.

A cloud radio gateway (CRG) node, located at the top layer in a core network of a mobile cellular network, wherein the mobile cellular network further comprises another CRG node located at the top layer in the core network, and at least one macro cloud (MC) node and at least one distributive unit (DU) node located in an access network, the at least one MC node and the at least one DU node are both capable of performing cloud computing, the at least one DU node is located in coverage of the at least one MC node, and the at least one MC node is located in coverage of the CRG node, the CRG node comprising:

• a public data network (PDN)/public switched telephone network (PSTN) gateway, configured to receive network data from a PDN/PSTN, and/or send network data to the PDN/PSTN;
• a management module, configured to allocate the network data received by the PDN/PSTN gateway to one node of the CRG node, the at least one MC node, the at least one DU node, and another CRG node in the core network or allocate the received network data to multiple nodes of the CRG node, the at least one MC node, the at least one DU node and the other CRG node, and/or forward the network data to the PDN/PSTN gateway;
• an air interface cloud processing module, configured to receive the network data allocated by the management module, perform signal processing of an air interface protocol stack on the received network data to generate a downlink baseband signal, and/or configured to perform signal processing of an air interface protocol stack on an uplink baseband signal to generate network data, and send the generated network data to the management module;
• and
• an air interface cloud processing control module, configured to receive the downlink baseband signal from the air interface cloud processing module and send the downlink baseband signal to the at least one MC node or to the at least one DU node through the at least one MC node, and/or receive the uplink baseband signal from the at least one MC node or from the at least one DU node through the at least one MC node and send the uplink baseband signal to the air interface cloud processing module.