Systems and methods may be used to map and collect data from a mesh network at a gateway device connecting a plurality of devices (e.g., edge devices, IoT devices, sensors, or the like) to a network. A method may include determining a shortest path tree (SPT) map of the plurality of devices, the shortest path tree map may define the mesh network for the plurality of devices connected to the gateway. The method may include sampling data throughout the mesh network based on a compressive sensing (CS) sampling schedule. The sampled data may be output, such as to a remote device via the network. The sampled data may be saved at the gateway.

Various example embodiments for supporting multicast are presented. Various example embodiments for supporting multicast are configured to support multicast, on a multicast tree for a multicast group, based on use of penultimate hop popping (PHP) on the multicast tree. Various example embodiments for supporting multicast are configured to support multicast, on a multicast tree for a multicast group, based on use of PHP on the multicast tree where the multicast tree is Point-to-Multipoint (P2MP) Multiprotocol Label Switching (MPLS) tree that is formed based on a TREE-SID multicast solution (although it will be appreciated that PHP may be applied on other types of multicast trees (e.g., other than P2MP MPLS multicast trees), on multicast trees formed based on other multicast solutions (e.g., other than TREE-SID), or the like, as well as various combinations thereof).

Embodiments include apparatuses, methods, and systems of routing network containing a set of sources, a primary destination, a set of secondary destinations, and one or more routing elements. A routing element includes an input port, a set of output ports including a primary output port and a set of secondary output ports, and a control unit. The control unit is arranged to select a secondary output port to deliver a received message when the intended destination of the message is a secondary destination and the secondary output port is in a functional state. Otherwise, the control unit is arranged to select the primary output port to deliver the received message to the primary destination when the intended destination is the secondary destination and the secondary output port that reaches the secondary destination is in a nonfunctional state. Other embodiments may also be described and claimed.

One technique includes receiving, in a first network, a multi-destination packet from a second network, and determining, based on the multi-destination packet, a first multi-destination tree in the first network for forwarding the multi-destination packet. In response to determining that the first multi-destination tree is not rooted on the network device, a second multi-destination tree in the first network is determined, and the multi-destination packet is transmitted using the second multi-destination tree. Another technique includes, upon detecting a first network device joining a network, sending a first indication to a second network device that the first network device is in a state for an amount of time. After the amount of time has elapsed, a second indication that the first network device has exited the state is sent to the second network device. A topology of the network is updated after the first network device has exited the state.

Systems and methods for supporting resource quotas for multicast group creation and membership in a high performance computing environment. In accordance with an embodiment, multicast group membership can present an issue in that inter-subnet partitions can, if left unchecked, runaway with multicast group creation within any given connected subnet. This can starve address map resources at router ports. A quota can be supplied that provides a maximum number of multicast groups any given inter-subnet partition is allowed to create within any given subnet.

The disclosure provides Internet of Things (IoT) systems organized as tree hierarchies in which rule processing can occur at each level of the tree hierarchies. In the IoT system according to one embodiment, formulas are defined and centrally managed at a cloud hub that is a root of a tree hierarchy. Each formula defined at the cloud hub is further percolated down to a hub, which may be the cloud hub itself or a local hub, in the tree hierarchy that is logically closest to devices specified in the formula. Each of the cloud and local hubs in the IoT system may utilize the same core IoT platform image, providing ease of management. In addition, formulas may be defined with basic stimuli and responses, as well as with higher-order stimuli and responses that combine one or more other stimuli and responses, respectively.

A method of distributing and aggregating resource data, such as transmission capacity. First, for each edge node in the domain a respective spanning tree is constructed that connects said edge node to ail other edge nodes and that identifies for each node other than said edge node in said tree a single upstream neighbour node and zero or more downstream neighbour nodes. Second, any node that has a change in resource data in connection with a particular spanning tree it is a member of, such as the transmission capacity increase or decreases, will send a message to update each of its upstream and downstream neighbour in that spanning tree on said change. Third, each such neighbour will calculate impact of said change to its own resource data and will send a message to update each of its upstream and downstream neighbour in that spanning tree on said impact.

Systems and methods for supporting dual-port virtual router in a high performance computing environment. In accordance with an embodiment, a dual port router abstraction can provide a simple way for enabling subnet-to-subnet router functionality to be defined based on a switch hardware implementation. A virtual dual-port router can logically be connected outside a corresponding switch port. This virtual dual-port router can provide an InfiniBand specification compliant view to a standard management entity, such as a Subnet Manager. In accordance with an embodiment, a dual-ported router model implies that different subnets can be connected in a way where each subnet fully controls the forwarding of packets as well as address mappings in the ingress path to the subnet.

Systems and methods for InfiniBand fabric optimizations to minimize SA access and startup failover times. A system can comprise one or more microprocessors, a first subnet, the first subnet comprising a plurality of switches, a plurality of host channel adapters, a plurality of hosts, and a subnet manager, the subnet manager running on one of the one or more switches and the plurality of host channel adapters. The subnet manager can be configured to determine that the plurality of hosts and the plurality of switches support a same set of capabilities. On such determination, the subnet manager can configure an SMA flag, the flag indicating that a condition can be set for each of the host channel adapter ports.

A method performed by a first network node for reducing the number of colliding transmissions in a mesh network is provided. The first network node and the second network node are configured to use periodic advertising for transmissions in the mesh network. The first network node calculates (402a) a first duration related to a transmission of data of a first size to be transmitted to the second network node. The first network node further calculates (402b) a second duration related to a period of time until a reception or a transmission of data is scheduled for second network node will occur. Based on the first and second duration the first network node decides (403) whether or not to decrease the first size of the transmission to a second size, so that first duration becomes shorter than the second duration. The first network then performs (404) the transmission according to the outcome of the deciding (403).