Load balancing system, load balancing device and topology management method

A load balancing system, comprising:

• a plurality of edge servers;
• a plurality of origin servers coupled to the plurality of edge servers, wherein each of the plurality of origin servers generates at least one of a plurality of video streams, video data of the plurality of video stream is synchronized to at least one of the plurality of edge servers;
• and
• a load balancing device coupled to the plurality of origin servers and the plurality of edge servers,
• wherein the load balancing device configures and maintains a transmission progress value for each of the plurality of edge servers,
• wherein the load balancing device groups the plurality of edge servers into a plurality of server groups, wherein the edge servers of each of the plurality of server groups provide one of the plurality of video stream, and each of the plurality of edge servers is grouped into at least one server group among the plurality of server groups,
• wherein the load balancing device selects a first edge server from the plurality of edge servers, wherein a bandwidth usage rate of the first edge server is more than a high load threshold, and the first edge server provides video data of at least one video stream of the plurality of video streams,
• wherein the load balancing device selects a first video stream from the at least one video stream corresponding of the first edge server,
• wherein the load balancing device selects a second edge server from the plurality of edge servers,
• wherein the load balancing device synchronizes video data of the first video stream to the second edge server,
• wherein the load balancing device sets a transmission progress value of the second edge server as a transmission progress value of the first edge server,
• wherein the load balancing device adds the second edge server into a server group corresponding to the first video stream.

A load balancing device, comprising a processing unit and a communication unit, wherein the load balancing device is coupled to a plurality of origin servers and a plurality of edge servers through the communication unit, the plurality of origin servers are coupled to the plurality of edge servers, each of the plurality of origin servers generates at least one of a plurality of video streams, and video data of the plurality of video stream is synchronized to at least one of the plurality of edge servers,

• wherein the processing unit configures and maintains a transmission progress value for each of the plurality of edge servers,
• wherein the processing unit groups the plurality of edge servers into a plurality of server groups, wherein the edge servers of each of the plurality of server groups provide one of the plurality of video stream, and each of the plurality of edge servers is grouped into at least one server group among the plurality of server groups,
• wherein the processing unit selects a first edge server from the plurality of edge servers, wherein a bandwidth usage rate of the first edge server is more than a high load threshold, and the first edge server provides video data of at least one video stream of the plurality of video streams,
• wherein the processing unit selects a first video stream from the at least one video stream corresponding of the first edge server,
• wherein the processing unit selects a second edge server from the plurality of edge servers,
• wherein the communication unit sends a message to the origin server corresponding to the first video stream or the second edge server, and synchronizes video data of the first video stream to the second edge server,
• wherein the processing unit sets a transmission progress value of the second edge server as a transmission progress value of the first edge server,
• wherein the processing unit adds the second edge server into the server group corresponding to the first video stream.