A multicast group allocation method, a centralized control point, and a multicast router are provided. A centralized control point determines a correspondence between at least two multicast groups and at least two RPs in a rendezvous point set according to information about the at least two multicast groups and information about the at least two RPs, where in the correspondence between the at least two multicast groups and the at least two RPs, each RP is corresponding to a same quantity of multicast groups; the centralized control point evenly allocates the at least two multicast groups to the at least two RPs according to the correspondence between the at least two multicast groups and the at least two RPs and diffuses the correspondence between the at least two multicast groups and the at least two RPs to all multicast routers on a PIM network.

In one embodiment, a method includes receiving a broadcast, unknown-unicast, or multicast (BUM) frame from a connected device, where the BUM frame is associated with a broadcast domain, determining a segment within the broadcast domain associated with the device, adding to the BUM frame a segment identifier that uniquely identifies the segment within the broadcast domain, and causing the BUM frame to be delivered to one or more recipient network apparatuses in a network associated with the broadcast domain, where the segment identifier added to the BUM frame is configured to be used by the one or more recipient network apparatuses to selectively forward the BUM frame to connected devices that are associated with segment identifier.

A network device detects a multicast video stream being from an upstream resource being sent to downstream multicast members. If the number of multicast members are below a threshold (e.g., 5 stations), multicast network packets can be converted to unicast network packets. On the other hand, if the number of multicast members are above the threshold, the multicast members are divided into groupings based on capabilities of the multicast members, such as data rate capability. Data rates of transmissions are set according to the group data rate capabilities. As a result, the higher data rate members are able to operate at a higher speed rather than at the lowest common denominator. Further, because there are several multicast streams being sent, packets missed from the higher data rate stream can be picked up on the lower data rate stream.

The present disclosure aims to provide a communication apparatus capable of achieving media distribution with a high quality of user experience. A communication apparatus is a communication apparatus configured to distribute media data to another communication apparatus via a plurality of lines, the apparatus including: a communication quality estimation unit configured to estimate communication qualities of the respective lines; a bit rate determination unit configured to calculate, from the estimated communication qualities of the respective lines, an index value indicating a quality of user experience when each of the lines is used and determine a bit rate of the media data based on the calculated index value; and a data allocation unit configured to allocate a data amount of the media data to the respective lines based on the estimated communication qualities of the respective lines and the bit rate that has been determined.

[Object] To provide a communication device and a communication method which are capable of achieving both an improvement in reliability of communication in which a frame is transmitted to a plurality of destinations and effective use of wireless communication resources. [Solution] The communication device includes: a communication unit configured to perform communication of a frame. The communication unit transmits a transmission acknowledgment request frame for a transmission acknowledgment response frame including frequency allocation information specifying a transmission frequency of the transmission acknowledgment response frame, and receives the transmission acknowledgment response frame which has undergone frequency division multiplexing, on the basis of the frequency allocation information.

[Object] To provide a communication device and a communication method which are capable of achieving both an improvement in reliability of communication in which a frame is transmitted to a plurality of destinations and effective use of wireless communication resources.

[Solution] The communication device includes: a communication unit configured to perform communication of a frame. The communication unit transmits a transmission acknowledgment request frame for a transmission acknowledgment response frame including frequency allocation information specifying a transmission frequency of the transmission acknowledgment response frame, and receives the transmission acknowledgment response frame which has undergone frequency division multiplexing, on the basis of the frequency allocation information.

[Object] To provide a communication device and a communication method which are capable of achieving both an improvement in reliability of communication in which a frame is transmitted to a plurality of destinations and effective use of wireless communication resources. [Solution] The communication device includes: a communication unit configured to perform communication of a frame. The communication unit transmits a transmission acknowledgment request frame for a transmission acknowledgment response frame including frequency allocation information specifying a transmission frequency of the transmission acknowledgment response frame, and receives the transmission acknowledgment response frame which has undergone frequency division multiplexing, on the basis of the frequency allocation information.

[Object] To provide a communication device and a communication method which are capable of achieving both an improvement in reliability of communication in which a frame is transmitted to a plurality of destinations and effective use of wireless communication resources.

[Solution] The communication device includes: a communication unit configured to perform communication of a frame. The communication unit transmits a transmission acknowledgment request frame for a transmission acknowledgment response frame including frequency allocation information specifying a transmission frequency of the transmission acknowledgment response frame, and receives the transmission acknowledgment response frame which has undergone frequency division multiplexing, on the basis of the frequency allocation information.

[Object] To provide a communication device and a communication method which are capable of achieving both an improvement in reliability of communication in which a frame is transmitted to a plurality of destinations and effective use of wireless communication resources.

[Solution] The communication device includes: a communication unit configured to perform communication of a frame. The communication unit transmits a transmission acknowledgment request frame for a transmission acknowledgment response frame including frequency allocation information specifying a transmission frequency of the transmission acknowledgment response frame, and receives the transmission acknowledgment response frame which has undergone frequency division multiplexing, on the basis of the frequency allocation information.

The present disclosure aims to provide a communication apparatus capable of achieving media distribution with a high quality of user experience. A communication apparatus is a communication apparatus configured to distribute media data to another communication apparatus via a plurality of lines, the apparatus including: a communication quality estimation unit configured to estimate communication qualities of the respective lines; a bit rate determination unit configured to calculate, from the estimated communication qualities of the respective lines, an index value indicating a quality of user experience when each of the lines is used and determine a bit rate of the media data based on the calculated index value; and a data allocation unit configured to allocate a data amount of the media data to the respective lines based on the estimated communication qualities of the respective lines and the bit rate that has been determined.