Relay node

A relay node for managing control data for relaying communication data, the relay node functioning as a master node or a slave node, the relay node comprising:

• a processor configured to execute a procedure, the procedure comprising:
• monitoring a status of a connection belonging to a connection group related to the communication data;
• transmitting a first update request to a first node upon receiving first communication data while the relay node functioning as the slave node, the first update request requesting to update first control data for relaying the first communication data, the first node functioning as the master node;
• determining whether to transfer authority of the master node to a second node in accordance with a status of a first connection belonging to a first connection group related to second communication data upon receiving a second update request from the second node while the relay node functioning as the master node, the second node functioning as the slave node, the second update request requesting to update second control data for relaying the second communication data;
• transmitting a first master transfer notification to the second node upon determining to transfer the authority of the master node to the second node, the first master transfer notification indicating that the authority of the master node is to be transferred to the second node;
• and
• preparing to become the master node upon receiving a second master transfer notification while the relay node functioning as the slave node, the second master transfer notification indicating that the authority of the master node is to be transferred to the relay node.

A computer-readable, non-transitory medium storing a program causing a computer functioning as a master node or a slave node to execute a procedure for managing control data for relaying communication data, the procedure comprising:

• monitoring a status of a connection belonging to a connection group related to the communication data;
• transmitting a first update request to a first node upon receiving first communication data while the computer functioning as the slave node, the first update request requesting to update first control data for relaying the first communication data, the first node functioning as the master node;
• determining whether to transfer authority of the master node to a second node in accordance with a status of a first connection belonging to a first connection group related to second communication data upon receiving a second update request from the second node while the computer functioning as the master node, the second node functioning as the slave node, the second update request requesting to update second control data for relaying the second communication data;
• transmitting a first master transfer notification to the second node upon determining to transfer the authority of the master node to the second node, the first master transfer notification indicating that the authority of the master node is to be transferred to the second node;
• and
• preparing to become the master node upon receiving a second master transfer notification while the computer functioning as the slave node, the second master transfer notification indicating that the authority of the master node is to be transferred to the computer.

A method executed by a relay node for managing control data for relaying communication data, the relay node functioning as a master node or a slave node, the method comprising:

• monitoring a status of a connection belonging to a connection group related to the communication data;
• transmitting a first update request to a first node upon receiving first communication data while the relay node functioning as the slave node, the first update request requesting to update first control data for relaying the first communication data, the first node functioning as the master node;
• determining, by the relay node, whether to transfer authority of the master node to a second node in accordance with a status of a first connection belonging to a first connection group related to second communication data upon receiving a second update request from the second node while the relay node functioning as the master node, the second node functioning as the slave node, the second update request requesting to update second control data for relaying the second communication data;
• transmitting a first master transfer notification to the second node upon determining to transfer the authority of the master node to the second node, the first master transfer notification indicating that the authority of the master node is to be transferred to the second node;
• and
• preparing to become the master node upon receiving a second master transfer notification while the relay node functioning as the slave node, the second master transfer notification indicating that the authority of the master node is to be transferred to the relay node.