| 主权项 |
1. A method for caching data, wherein the method comprises:
receiving, by an ith forwarding device on a first content delivery path, a first data packet from a server, wherein the first content delivery path is a packet transmission path between first user equipment and the server, a quantity of all forwarding devices on the first content delivery path is k, i is an integer that is greater than or equal to 1 and that is less than or equal to k, the first data packet comprises a caching gain, first content, and an identity of the first content, the caching gain is a maximum value of local caching gains of all the forwarding devices on the first content delivery path, and the local caching gains of all the forwarding devices on the first content delivery path correspond to the identity of the first content; determining, by the ith forwarding device, whether the caching gain in the first data packet matches a local caching gain corresponding to the identity of the first content, wherein the local caching gain corresponding to the identity of the first content is generated by calculation according to a first parameter and a popularity of the first content, and the first parameter is used for identifying bandwidth consumed by transmitting the first content between the ith forwarding device and the server; and when the ith forwarding device determines that the caching gain in the first data packet matches the local caching gain corresponding to the identity of the first content, caching, by the ith forwarding device, the first content comprised in the first data packet. |
