Abstract: This application provides a P2P-based data distribution method, apparatus, and system. The method is applied to a data distribution system, where the data distribution system includes at least three devices and a server. The method includes: Any one of the at least three devices sends request information to the server, and receives response information sent by the server. The any device determines a first target device set from adjacent devices based on the response information, and sends first data to a device in the first target device set, where the first data carries identification information of the any device, and the identification information is used to indicate the device in the first target device set to distribute the first data to a device in a second target device set when determining the first data as to-be-distributed data.

Abstract: A buffer control method, a network element, and a system. The method includes: receiving, by a network element, a flow table message from a controller, where the flow table message includes buffer information of a data packet matching a flow table; processing, by the network element, a buffer of the data packet based on the buffer information, and sending a flow table response message to the controller. In the method, the network element can save, based on a corresponding saving manner, at least one data packet matching the flow table to the buffer corresponding to the flow table. Thus a data flow granularity-based buffer processing manner can be supported in an OpenFlow protocol, and a data buffering requirement of a mobile network can be met.

Abstract: Embodiments provide an aggregate rate control method, a device, and a system. A gateway switch receives a flow entry and a link table from a software-defined networking (SDN) controller. The flow entry includes at least a match field and a flow-entry instruction, and the link table includes at least a packet processing operation. The gateway switch parses to obtain header information of a received target data packet, and matches the header information with the match field in the flow entry. When the header information matches the match field in the flow entry, a link instruction is executed in the flow-entry instruction in the flow entry. The packet processing operation in the link table is performed, and the packet processing operation is used to discard or buffer the target data packet when a bit rate of an aggregate service flow is greater than a specified maximum aggregate rate.

Abstract: Embodiments provide an aggregate rate control method, a device, and a system. A gateway switch receives a flow entry and a link table from a software-defined networking (SDN) controller. The flow entry includes at least a match field and a flow-entry instruction, and the link table includes at least a packet processing operation. The gateway switch parses to obtain header information of a received target data packet, and matches the header information with the match field in the flow entry. When the header information matches the match field in the flow entry, a link instruction is executed in the flow-entry instruction in the flow entry. The packet processing operation in the link table is performed, and the packet processing operation is used to discard or buffer the target data packet when a bit rate of an aggregate service flow is greater than a specified maximum aggregate rate.

Abstract: A buffer control method, a network element, and a system. The method includes: receiving, by a network element, a flow table message from a controller, where the flow table message includes buffer information of a data packet matching a flow table; processing, by the network element, a buffer of the data packet based on the buffer information, and sending a flow table response message to the controller. In the method, the network element can save, based on a corresponding saving manner, at least one data packet matching the flow table to the buffer corresponding to the flow table. Thus a data flow granularity-based buffer processing manner can be supported in an OpenFlow protocol, and a data buffering requirement of a mobile network can be met.

Abstract: Embodiments of the present disclosure provide a data packet sending method and apparatus, and relate to communications field. The method includes: receiving, by an SGW-U, a data packet, and matching context information of a corresponding bearer according to a tunnel endpoint identifier (TEID) carried in the data packet; sending a trigger message to a serving gateway for control plane SGW-C if the SGW-U determines, through matching, that the SGW-U does not include the context information of the bearer, where the trigger message carries the TEID, and the trigger message is used by the SGW-C to obtain the context information of the bearer according to the TEID; receiving a reestablish bearer context message sent by the SGW-C, where the reestablish bearer context message carries the context information of the bearer; and sending the data packet according to the context information of the bearer.

Abstract: Embodiments of the present disclosure provide a data packet sending method and apparatus, and relate to communications field. The method includes: receiving, by an SGW-U, a data packet, and matching context information of a corresponding bearer according to a tunnel endpoint identifier (TEID) carried in the data packet; sending a trigger message to a serving gateway for control plane SGW-C if the SGW-U determines, through matching, that the SGW-U does not include the context information of the bearer, where the trigger message carries the TEID, and the trigger message is used by the SGW-C to obtain the context information of the bearer according to the TEID; receiving a reestablish bearer context message sent by the SGW-C, where the reestablish bearer context message carries the context information of the bearer; and sending the data packet according to the context information of the bearer.