The present application provides a data transmission method, device and system. The method comprises: a sending device sends a data packet to a receiving device by means of a first relay device, and receives feedback information of the receiving device on the receiving condition of the data packet by means of another communication link according to a predetermined condition. Therefore, the sending device can timely obtain the feedback information of the receiving device on the receiving condition of the data packet by means of another communication link under a predetermined condition.

In an embodiment, a method includes, in response to detecting available memory of a destination node of a packet flow of nodes to the destination node being below a particular threshold, marking the destination node as being in a backpressure state. The destination node, in the backpressure state, sends a signal indicating a condition of packet backpressure to the nodes of the packet flow, and initiates a timer for a particular time period. The method further marks, at the end of the particular time period, the destination node as being in a bad actor state if the available memory is below the particular threshold, and as being in a good actor state if the memory is above the particular threshold. The method, in response to marking the destination node as being in a bad actor state, sends a signal to the nodes causing the nodes to drop packets directed to the destination node.

A data transmission acceleration method and related apparatuses are disclosed. A sanding node transmits a plurality of data packets to a receiving node at an initial transmission rate. Each data packet carries a random sequence number and a rolling sequence number. The random sequence number identifies a data part of the data packet, and the rolling sequence number indicates a transmission sequence of the data packet. The sending node receives a packet loss feedback from the receiving node. The packet loss feedback is generated after the receiving node detects a packet loss event according to a rolling sequence number of a received data packet. The sending node determines a random sequence number of a lost data packet based on the received packet loss feedback. The sending node retransmits a data packet corresponding to the determined random sequence number. The retransmitted data packet carries a new rolling sequence number.

A method for traffic control are provided, includes: obtaining, by a control node, a delay prediction value of a service packet sent by a source node to a destination node after a current moment; and determining, by the control node, a congestion detection result of current traffic transmission based on a packet delay variation trend and the delay prediction value, and sending the congestion detection result to the source node, and the packet delay variation trend corresponds to a congestion duration change.

In an embodiment, a method includes, in response to detecting available memory of a destination node of a packet flow of nodes to the destination node being below a particular threshold, marking the destination node as being in a backpressure state. The destination node, in the backpressure state, sends a signal indicating a condition of packet backpressure to the nodes of the packet flow, and initiates a timer for a particular time period. The method further marks, at the end of the particular time period, the destination node as being in a bad actor state if the available memory is below the particular threshold, and as being in a good actor state if the memory is above the particular threshold. The method, in response to marking the destination node as being in a bad actor state, sends a signal to the nodes causing the nodes to drop packets directed to the destination node.

An information communication device arranged between a transmission-side device and a reception-side device according to one embodiment includes a reception unit that receives transmission data to be transmitted from the transmission-side device to the reception-side device, a control unit that receives a notification indicating deterioration in quality the transmission data, determines conversion object data for converting a data type of the transmission data or reducing an information amount of the transmission data and non-conversion object data for not converting a data type based on the notification, and generates post-conversion object data by converting a type of the conversion object data based on the notification, a transmission queue that synthesizes the non-conversion object data and the post-conversion object data and generates converted transmission data, and a transmission unit that transmits the converted transmission data to the reception-side device.

An information communication device arranged between a transmission-side device and a reception-side device according to one embodiment includes a reception unit that receives transmission data to be transmitted from the transmission-side device to the reception-side device, a control unit that receives a notification indicating deterioration in quality the transmission data, determines conversion object data for converting a data type of the transmission data or reducing an information amount of the transmission data and non-conversion object data for not converting a data type based on the notification, and generates post-conversion object data by converting a type of the conversion object data based on the notification, a transmission queue that synthesizes the non-conversion object data and the post-conversion object data and generates converted transmission data, and a transmission unit that transmits the converted transmission data to the reception-side device.

A VNF operation apparatus is a processing apparatus that relocates data processing functions to another apparatus to continue data processing and includes: a storage unit configured to store information indicating a communication relationship between apparatuses; an estimation unit configured to calculate, based on the information indicating the communication relationship, an estimation value of a transfer delay of data generated during relocation for a plurality of schedulings having different orders of relocation of the data processing functions; a scheduling unit configured to select a scheduling for which the estimation value calculated by the estimation unit is minimized, and sets, based on the selected scheduling, an order of relocation of the data processing functions and a start timing of relocation of the data processing functions; and a relocation unit configured to relocate VNFs to the other apparatus in accordance with the order and the timing set by the scheduling unit.

A VNF operation apparatus is a processing apparatus that relocates data processing functions to another apparatus to continue data processing and includes: a storage unit configured to store information indicating a communication relationship between apparatuses; an estimation unit configured to calculate, based on the information indicating the communication relationship, an estimation value of a transfer delay of data generated during relocation for a plurality of schedulings having different orders of relocation of the data processing functions; a scheduling unit configured to select a scheduling for which the estimation value calculated by the estimation unit is minimized, and sets, based on the selected scheduling, an order of relocation of the data processing functions and a start timing of relocation of the data processing functions; and a relocation unit configured to relocate VNFs to the other apparatus in accordance with the order and the timing set by the scheduling unit.

Examples described herein include configuration of a transmitting network device to identify a source queue-pair identifier in at least some of the packets that are transmitted to an endpoint destination. A network device that receives packets and experiences congestion can determine if a congestion causing packet includes a source queue-pair identifier. If the congestion causing packet includes a source queue-pair identifier, the network device can form and transmit a congestion notification message with a copy of the source queue-pair identifier to the transmitting network device. The transmitting network device can access a context for the congestion causing packet using the source queue-pair identifier without having to perform a lookup to identify the context.