Described is a method for estimating throughput between first and second communication devices, the method comprising: determining maximum bottleneck throughput of a communication link between the first communication device and a third communication device, wherein the communication link between the first and third communication devices applies a common access network as between a communication link between the first and second communication devices; determining Round Trip Time (RTT) between the first and second communication devices; transmitting packet by applying User Datagram Protocol (UDP) from the third communication device to the first communication device; measuring packet loss rate associated with the transmitted packet by monitoring sequence number of the packet; and translating measured packet loss rate to Transmission Control Protocol (TCP) throughput according to maximum bottleneck throughput and RTT.

A network device includes a rate measurement circuit that is configured to measure respective egress rates at which respective data is being transmitted via respective ports associated with the network device. A marking ratio determination circuit is configured to select respective marking ratios based on respective measured egress rates, the marking ratios for marking packets to be transmitted via the respective ports to indicate respective levels of congestion corresponding to the respective ports. Different marking ratios correspond to different measured egress rates. A packet editor circuit is configured to mark selected packets to be transmitted via respective ports according to the respective selected marking ratios. The respective selected marking ratios indicate to other communication devices that respective network paths via which the selected packets travelled experienced congestion, and the respective marking ratios indicate respective levels of congestion.

Embodiments of the invention disclose a data transmission method, a device, and a computer storage medium to perform data transmission. A congestion status of a transmission port is obtained by a first device. The transmission port is a communications port used by the first device when a second device transmits data to the first device. The congestion status is used to indicate whether data congestion occurs on the transmission port. Indication information is sent to the second device when a mode switching condition is met. The indication information is used to instruct the second device to switch a transmission mode used when the second device transmits the data, so that the second device transmits the data to the first device in a switched transmission mode, and the mode switching condition is associated with the congestion status of the transmission port.

Example methods are provided for a first switch to perform congestion-aware load balancing in a data center network. The method may comprise: receiving probe packets from multiple next-hop second switches that connect the first switch with a third switch via multiple paths. The method may also comprise: processing congestion state information in each probe packet to select a selected next-hop second switch from the multiple next-hop second switches, the selected next-hop second switch being associated with a least congested path from the first switch to the third switch. The method may further comprise: in response to receiving data packets from a fourth switch that are destined for a destination connected with the third switch, sending the data packets to the selected next-hop second switch such that the data packets travel to the third switch along the least congested path.

A method of reporting congestion in an upstream direction in a service chain function architecture. The method includes receiving, by the downstream device, a packet indicating congestion within a service function chaining architecture; generating, by the downstream device, a congestion report message in response to receiving the packet, wherein the congestion report message comprises a field indicating an existence of congestion within the service function chaining architecture and a service path identifier indicating a location of the congestion within the service function chaining architecture; and transmitting, by the downstream device, the congestion report message to an upstream device to permit the upstream device to address the congestion.

An Encrypted Transport Proxy Backbone Protocol module is configured to set up ET Proxy Backbone connections with another distributed proxy device with each ET Proxy Backbone connection including multiple ET Proxy Backbone channels for transmitting ET proxy packets having different QoS classes. Each ET Proxy Backbone channel includes a separate queue. The ET Proxy Backbone Protocol module is also configured to schedule transmissions of the ET proxy packets from each respective queue; multiplex the ET proxy packets from each respective queue via the associated ET Proxy Backbone channel; perform local recovery of network impairments over the access network and perform congestion control to prevent packets from client devices and web servers from causing network congestion to the access network.

An Encrypted Transport (ET) proxy module is configured to receive incoming ET proxy packets from an ET proxy backbone module and transmit outgoing ET proxy packets to the ET proxy backbone module. The ET proxy module is also configured to set up an HTTP tunnel with an ET proxy client of the client device or with an ET proxy at a web server for receiving incoming UDP payloads from the client device or web server and transmitting outgoing UDP payloads to the client device or web server. The ET proxy module is also configured to receive prioritization preferences from client devices or web servers pertaining to the UDP payloads indicating preferred quality-of-service (QoS) classes for the UDP payloads, and to schedule transmission of the outgoing UDP payloads via the HTTP tunnel based on QoS classes of the outgoing UPD payloads.

A method for regulating traffic of a Transmission Control Protocol (TCP) flow includes: deciding, based on a ratio of current bucket level to bucket size, a value of an Explicit Congestion Notification (ECN) bit of a packet; setting a field of a meter tag of the packet based on a packet length of the packet, the value of the ECN bit, and a current bucket level; updating the current bucket level based on the field of the meter tag; calculating an actual transmission rate; and determining an adjustment value based on a difference between the actual transmission rate and a target rate, and adjusting a rate of change of bucket level based on the adjustment value.

A network congestion notification method and network node are provided in a network system. The network node receives a remote direct memory access (RDMA) packet, where the RDMA packet carries a source queue pair number corresponding to a transmit end and a destination queue pair number corresponding to a receive end. The network node generates a congestion notification packet when detecting network congestion, where a destination queue pair number of the congestion notification packet is the source queue pair number. Then the network node sends the congestion notification packet to the transmit end so that the transmit end may decrease a sending rate of a data flow to which the first data packet belongs.

The present disclosure is related to wireless telecommunications networks and in particular to measuring and determining performance of a wireless telecommunications network. The network may be a cellular network, a WiFi network, or a combination of both. The present disclosure is further directed to a method for determining a parameter indicating quality of service for a wireless connection. In the method, changes in latency over a connection are measured using probe packets and if an increase of latency that is over a predetermined relative threshold is observed, the wireless connection is determined to be congested.