Route selection method and system, network acceleration node, and network acceleration system

A route selection system, comprising a detecting module, an analyzing and processing module, a receiving and sending module, and a computing and processing module, wherein:

• the detecting module is configured to detect a delay and a packet loss rate of a link from a network acceleration node to other network acceleration nodes or a source site IP, obtain a load and a bandwidth utilization rate of the other network acceleration node, and send a detection result to the analyzing and processing module or the receiving and sending module;
• the analyzing and processing module is configured to receive the detection result from the detecting module or the receiving and sending module, determine whether an egress network acceleration node is available based on the detection result, and send an analyzing and processing result to the receiving and sending module, wherein the egress network acceleration node is a last-hop network acceleration node connected to the source site;
• the computing and processing module is configured to obtain, from the detecting module, a delay of a link from the network acceleration node to each available egress network acceleration node, obtain, from the receiving and sending module, a delay of a link from the each available egress network acceleration node to a source site IP, calculate a sum of the two delays, select a route having a minimum sum of the two delays as a route selection result, and send the route selection result to the receiving and sending module;
• and
• the receiving and sending module is configured to receive a user access request, a detection result from the detecting module, a determination result from the analyzing and processing module, a route selection result from the computing and processing module, and detection requests sent by other network acceleration nodes, and transmit the detection requests, the detection result, and the route selection result.