Example implementations relate to congestion management across a network fabric. An example implementation includes setting an uncongested sequence length threshold to a first value. A completed transaction received count may also be set to an initial value. The completed transaction received count may be incremented in response to a completion of a transaction request. In response to a detected congestion event, the injection rate may be decreased. A second value for the uncongested sequence length threshold may be determined from the CTR count, and the uncongested sequence length threshold may be set to the second value. Furthermore, in response to the CTR count being greater than or equal to the uncongested sequence length threshold, the injection rate may be increased.

A method performed by a network device comprises egressing data from a port of the network device at an egress rate over a link connected to the port, ingressing data into the port at an ingress rate over the link, monitoring at least one indication with respect to the egressing data in order to determine whether the at least one indication is indicative of egress congestion at the port of the network device, and upon determining that the at least one indication is indicative of the egress congestion at the port, limiting the rate of ingress via the port.

The present disclosure generally relates to systems, methods and software for determining an optimal burst transmission time through a modem, such as a cable modem, a wireless access point, a node in a cable network, or a satellite communication link. Particularly, the present disclosure makes it possible for a burst of queued data, defined as data above a certain percentile of a monitored traffic rate, to be transmitted by the modem at a time that provides the best chance of avoiding a collision with a co-occurring burst of data from another user connected to the same modem. In an embodiment, the systems, methods and software disclosed herein use the optimal transmission time to replace a contention window transmission time, at least for bursty data, or they completely eliminate the need for contention windows, at least for bursty data.

Network communication is carried out by sending packets from a source network interface toward a destination network interface, receiving one of the packets in an intermediate switch of the network, determining that the intermediate switch is experiencing network congestion, generating in the intermediate switch a congestion notification packet for the received packet, and transmitting the congestion notification packet from the intermediate switch to the source network interface via the network. The received packet is forwarded from the intermediate switch toward the destination network interface. The source network interface may modify a rate of packet transmission responsively to the congestion notification packet.

A method for fast link recovery for an Ethernet link is disclosed. The method includes detecting a drop in link quality and performing a first fast retrain sequence, including determining and exchanging THP coefficients based on the drop in link quality. If the performed fast retrain fails to recover the link, a data rate associated with the link is reduced, and a second fast retrain sequence performed.

A device may receive channel data associated with a channel provided between a network and a user device, and may calculate, based on the channel data, key performance indicator data that includes a plurality of key performance indicators for the channel. The device may multiply the plurality of key performance indicators by factors to generate factored key performance indicator data that includes a plurality of factored key performance indicators. The device may apply weights to the plurality of factored key performance indicators of the factored key performance indicator data to generate factored weighted key performance indicator data that includes a plurality of factored weighted key performance indicators. The device may calculate a quality indicator for the channel based on the factored weighted key performance indicator data, and may perform one or more actions based on the quality indicator for the channel.

A method includes, in response to receiving an overload start indication from a network node, composing and sending first signaling to at least one user equipment to indicate that an overload condition exists for the network node and, in response to receiving an overload end indication from the network node, composing and sending second signaling to the at least one user equipment to indicate that the overload condition no longer exists. A further method includes receiving at a user equipment first signaling from a network access node that indicates that an overload condition exists for a network node and abstaining from making a network access attempt until receiving second signaling from the network access node that indicates that the overload condition no longer exists for the network node. Corresponding apparatus and computer programs are also disclosed.

In one embodiment, a method includes sending a first flow control signal to a first stage of transmit queues when a receive queue is in a congestion state. The method also includes sending a second flow control signal to a second stage of transmit queues different from the first stage of transmit queues when the receive queue is in the congestion state.

Systems, methods, and instrumentalities are disclosed to perform rate adaptation in a wireless transmit/receive unit (WTRU). The WTRU may receive an encoded data stream, which may be encoded according to a Dynamic Adaptive HTTP Streaming (DASH) standard. The WTRU may request and/or receive the data stream from a content server. The WTRU may monitor and/or receive a cross-layer parameter, such as a physical layer parameter, a RRC layer parameter, and/or a MAC layer parameter (e.g., a CQI, a PRB allocation, a MRM, or the like). The WTRU may perform rate adaption based on the cross-layer parameter. For example, the WTRU may set the CE bit of an Explicit Congestion Notification (ECN) field based on the cross-layer parameter. The WTRU may determine to request the data stream encoded at a different rate based on the cross-layer parameter, the CE bit, and/or a prediction based on the cross-layer parameter.

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for a distributed system architecture for unmanned air vehicles. One of the methods includes obtaining information identifying flight information of a UAV, with the flight information including flight phase information or a contingency condition associated with a flight critical module included in the UAV. The obtained information is analyzed, and one or more first payload modules are determined to enter a modified power state. Requests to enter the modified power state are caused to be transmitted to each determined payload module in the one or more first payload modules.