Embodiments of this application describe a retransmission timeout (RTO) determining method and a related apparatus. The method includes a transmission device sending, to a network analyzer, a network throughput at which communication is performed through a first communication connection, where the network throughput is used by the network analyzer to determine an RTO corresponding to the first communication connection. The network analyzer obtains a first network throughput at which the transmission device performs communication through the first communication connection. The network analyzer calculates, based on the first network throughput, a first RTO corresponding to the first communication connection. The network analyzer sends the first RTO to the transmission device. The transmission device receives the first RTO sent by the network analyzer. The embodiments of this application help improve efficiency of retransmitting a lost data packet.

As described herein, a router signals a source device to establish a new stateful communication session with a destination device by changing a network path used by traffic associated with the session. In one example, a router forwards traffic of a first stateful routing session established by the source device along a first path. In response to determining that that the first path should not be used, the router forwards a packet of the first session along a second path. The destination device recognizes the change in path, which causes the destination device to reject the packet, which in turn causes the source device to establish a second stateful routing session. The router forwards subsequent traffic of the second stateful routing session along the second path.

A VNF operation apparatus (10) is a processing apparatus that relocates data processing functions to another apparatus to continue data processing and includes: a storage unit (12) configured to store information indicating a communication relationship between apparatuses; an estimation unit (132) 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 (133) configured to select a scheduling for which the estimation value calculated by the estimation unit (132) 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 (134) 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 (10) is a processing apparatus that relocates data processing functions to another apparatus to continue data processing and includes: a storage unit (12) configured to store information indicating a communication relationship between apparatuses; an estimation unit (132) 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 (133) configured to select a scheduling for which the estimation value calculated by the estimation unit (132) 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 (134) configured to relocate VNFs to the other apparatus in accordance with the order and the timing set by the scheduling unit.

A network element includes at least one headroom buffer, and flow-control circuitry. The headroom buffer is configured for receiving and storing packets from a peer network element having at least two data sources, each headroom buffer serving multiple packets. The flow-control circuitry is configured to quantify a congestion severity measure, and, in response to detecting a congestion in the headroom buffer, to send to the peer network element pause-request signaling that instructs the peer network element to stop transmitting packets that (i) are associated with the congested headroom buffer and (ii) have priorities that are selected based on the congestion severity measure.

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 method for data packet delay management in a communications network connecting a sender node over an eCPRI interface to a receive node. The method performed at the receiver node receiving data packets from the sender node comprises monitoring (102) a buffer level at a buffer receiving data from the sender node. When the buffer level reaches a threshold (104-Yes) the method further comprises transmitting (108) to the sender node over the eCPRI interface at least one message comprising information indicative of length of time of a Medium Access Control, MAC, flow control and transmitting (114) at least one MAC flow control frame to the sender node with a delay (110,112).

The present disclosure relates to methods and apparatuses. According to some embodiments of the disclosure, a method includes: receiving, at a communication device, a configuration message including a threshold to configure the communication device; and transmitting, from the communication device, a congestion indication if an occupied buffer size of the communication device is equal to or greater than the threshold.

Systems and methods are provided for operating a media transmission network. The system includes at least one destination device for receiving a plurality of media streams from a plurality of source devices. The system further includes a controller that is configured to, for each media stream of the plurality of media streams: determine a media property adjustment for the media stream based at least on the media stream; identify a source device from the plurality of source devices associated with generating the media stream; determine at least one device setting for the identified source device to apply the media property adjustment to the media stream; generate a control packet for configuring the identified source device based on the at least one device setting, the control packet including the at least one device setting; and transmit the control packet to the identified source device.

This application provides a virtual channel setting method and the method includes: a' receiving device receives a first data packet of a first data flow from a sending device, where the first data packet includes an identifier of a first virtual channel corresponding to the first data flow; the receiving device selects a second virtual channel for the first data flow from a first virtual channel group corresponding to the first data flow, where the second virtual channel is different from the first virtual channel; and the receiving device sends an acknowledgement packet to the sending device, where the acknowledgement packet includes an identifier of the second virtual channel, and the second virtual channel is used by the sending device to update a virtual channel corresponding to the first data flow.