The present technology relates to a transmission apparatus, a transmission method, a reception apparatus, and a reception method that enable channel selection information and time information to be transmitted effectively. A transmission apparatus acquires channel selection information for selecting a service and time information used for synchronizations on a transmission side and a reception side, generates, as a physical layer frame constituted of a preamble and a data portion, the physical layer frame in which specific information including at least one of the channel selection information and the time information is arranged at a head of the data portion right after the preamble, and transmits the physical layer frame as digital broadcast signals. The present technology is applicable to IP packet broadcasting, for example.

A management server capable of allocating a network parameter desired by a user to a communication device corresponding to a node constituting a network structure that has been constructed in advance in a simpler way is provided. A management server (20) includes a management unit (22), a reception unit (24), and an update unit (26). The management unit (22) manages network information indicating a network structure composed of a plurality of nodes, network parameters associated with the plurality of respective nodes in advance, and apparatus identification information of communication apparatuses corresponding to the plurality of respective nodes. The reception unit (24) receives, from a communication apparatus (10-2) corresponding to a second node, a change notification indicating that a communication apparatus (10-1) corresponding to a first node has been changed. The update unit (26) updates information regarding the first node in the network information using the change notification.

In some examples, a software-defined network (SDN) controller determines a link aggregation (LAG) configuration for a node in the SDN that is controlled by the SDN controller. The LAG configuration is based on hardware capability information and dynamic network traffic information of the SDN. The SDN controller can further instruct the node to forward traffic in accordance with the LAG configuration.

The present technology relates to a transmission apparatus, a transmission method, a reception apparatus, and a reception method that enable channel selection information and time information to be transmitted effectively.

A transmission apparatus acquires channel selection information for selecting a service and time information used for synchronizations on a transmission side and a reception side, generates, as a physical layer frame constituted of a preamble and a data portion, the physical layer frame in which specific information including at least one of the channel selection information and the time information is arranged at a head of the data portion right after the preamble, and transmits the physical layer frame as digital broadcast signals. The present technology is applicable to IP packet broadcasting, for example.

A network device includes multiple ports, for communicating over a communication network, and packet processing circuitry. The packet processing circuitry is configured to receive via the ports packets belonging to a plurality of multicast flows, to receive, for each of the multicast flows, (i) a first configuration that specifies clients that are to receive the multicast flow prior to a specified switch-over time, and (ii) a second configuration that specifies the clients that are to receive the multicast flow after the specified switch-over time, to forward the multicast flows via the ports in accordance with the first configuration, to extract from a field in at least one of the packets a value that is indicative of the switch-over time, and, based on the extracted value, to switch-over forwarding of the multicast flows from the first configuration to the second configuration simultaneously at the switch-over time.

The present technology relates to a transmission apparatus, a transmission method, a reception apparatus, and a reception method that enable channel selection information and time information to be transmitted effectively.

A transmission apparatus acquires channel selection information for selecting a service and time information used for synchronizations on a transmission side and a reception side, generates, as a physical layer frame constituted of a preamble and a data portion, the physical layer frame in which specific information including at least one of the channel selection information and the time information is arranged at a head of the data portion right after the preamble, and transmits the physical layer frame as digital broadcast signals. The present technology is applicable to IP packet broadcasting, for example.

The present technology relates to a transmission apparatus, a transmission method, a reception apparatus, and a reception method that enable channel selection information and time information to be transmitted effectively. A transmission apparatus acquires channel selection information for selecting a service and time information used for synchronizations on a transmission side and a reception side, generates, as a physical layer frame physical layer frame constituted of a preamble and a data portion, the physical layer frame in which specific information including at least one of the channel selection information and the time information is arranged at a head of the data portion right after the preamble, and transmits the physical layer frame as digital broadcast signals. The present technology is applicable to IP packet broadcasting, for example.

Disclosed are a data transmission method and system. One or more pre-setup first bearers are disposed between a first network device and a base station. One or more pre-setup second bearers are disposed between the first network device and a second network device. The transmission method includes the following steps: receiving, by the first network device by using one first bearer, data sent by the base station, where the data is sent by a terminal to the base station by using an air interface resource, and the first bearer used to receive the data is corresponding to a first service attribute of the data; and sending, by the first network device, the data to the second network device by using one second bearer, where the second bearer used to send the data is corresponding to a second service attribute of the data.

In some examples, a software-defined network (SDN) controller determines a link aggregation (LAG) configuration for a node in the SDN that is controlled by the SDN controller. The LAG configuration is based on hardware capability information and dynamic network traffic information of the SDN. The SDN controller can further instruct the node to forward traffic in accordance with the LAG configuration.

The present technology relates to a transmission apparatus, a transmission method, a reception apparatus, and a reception method that enable channel selection information and time information to be transmitted effectively.

A transmission apparatus acquires channel selection information for selecting a service and time information used for synchronizations on a transmission side and a reception side, generates, as a physical layer frame constituted of a preamble and a data portion, the physical layer frame in which specific information including at least one of the channel selection information and the time information is arranged at a head of the data portion right after the preamble, and transmits the physical layer frame as digital broadcast signals. The present technology is applicable to IP packet broadcasting, for example.