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185 results about "Channel scheduling" patented technology

Hardware shunt method of IP report

The invention relates to a hardware shunt method of an IP report. In the technical scheme of the invention, a received IP report is shunted by a piece of network card hardware; the source address and the target address of an IP report title are extracted when the IP report is received by a network card; Hash algorithm is then employed to calculate tread to which the IP report belongs; and a DMA channel scheduling module starts up a DMA engine according to tread number to transmit the report to a main storage buffer area to which the tread belongs; in order to support hardware shunt strategy of the IP report, an upper-layer software ensures each tread to have a special main storage buffer area; the network card starts up the threads of a plurality of IP packages to correspond to the treads of host processing IP packages one to one; the treads of the host processing IP packages directly acquires data from a memory buffer area for processing; therefore, the transmission of intermediate data does not need a CPU, thereby reducing the CPU load. The hardware tread number supported by the method is as high as 1024 and even as higher as 4096 or 8192. The best configuration is that each CPU is corresponding to one tread, so that each tread operates independently without mutual interference; moreover, the best performance is achieved due to the least system resource sharing.
Owner:WUXI CITY CLOUD COMPUTING CENT

Wireless sensing network communication scheduling method combined by division cluster and Mesh

InactiveCN101252512AResolve interferenceSolve the problem of excessive idle listening of nodesData switching by path configurationWireless communicationChannel schedulingBeacon frame
The invention discloses a Mesh and clustering combination-based wireless sensing network channel scheduling method. Each node point carries out respective task dispatching periodically in the network, and the communication among the node points is realized. The channel scheduling method adopts the main concept that in intra-cluster communication, after a dispatching cycle of a upper layer node point is formed, a lower layer node point can be informed in a periodic broadcast Beacon frame form, so that the lower layer node point is added into the clusters established by the upper layer node point and to maintain the clock synchronization of the upper node point; in inter-cluster communication, backbone nodes takes charge of route setup and inter-cluster data transmission. The channel scheduling method effectively solves the problems that the interference of the intra-cluster high power communication to the inter-cluster communication and the excessive idle listening of the node point through the division of the intra-cluster communication time interval and the introduction of the sleeping mechanism of the node point. The channel scheduling method provided by the invention is suitable for a certain part of typical wireless sensing network utilization, and simultaneously can be used as an expanding basis for other wireless sensing network.
Owner:JIAXING WIRELESS SENSOR NETWORKS CENT CAS
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