Patent ID: 8872886

Claim:
A method for establishing a multi-cascade channel, comprising: receiving a site code stream obtaining request sent by a requester, wherein the request comprises at least one identifier of a site; receiving an address and a port that correspond to the identifier of the site; establishing, according to encoding information of a code stream of the site identified by the identifier of the site and the address and the port that correspond to the identifier of the site, a multi-cascade channel used for transmitting the code stream of the site identified by the identifier of the site; and sending, through the multi-cascade channel, the code stream of the site identified by the identifier of the site, wherein before establishing the multi-cascade channel, the method further comprises determining that a code stream of the site identified by each identifier of the site in a first identifier set of the site can be sent to the requester, wherein the first identifier set of the site is a subset of identifiers of sites in the site code stream obtaining request, wherein establishing the multi-cascade channel comprises establishing, according to encoding information of the code stream of the site identified by each identifier of the site in the first identifier set of the site, and the address and the port that correspond to the first identifier set of the site, the multi-cascade channel used for transmitting the code stream of the site identified by each identifier of the site in the first identifier set of the site, and wherein sending the code stream comprises sending, through the multi-cascade channel, the code stream of the site identified by each identifier of the site in the first identifier set of the site.