43 results about "Periodic scheduling" patented technology

The invention discloses a periodic scheduling timetable construction method applied to a time-triggered switched network. The periodic scheduling timetable construction method is based on the time-triggered switched network, time-triggered (TT) task establishment and deletion flows are designed on the basis of putting forward the concept of a periodic scheduling timetable to realize the effective real-time transmission of a TT task; the establishment of the periodic scheduling timetable in each node in a system is realized by putting forward an offline task establishment method and a dynamic task establishment method; the optimization of the dynamic task establishment method is realized by putting forward a left compression principle; and the form assessment method and optimization of the offline task establishment method are realized by putting forward a public idle timeslot method.

A method for processing interference signals, comprising the following steps of: receiving, by a terminal, configuration information sent by a base station to obtain periodic scheduling configuration information of a neighbor cell on specific time-frequency resources; detecting, by the terminal, an interference signal of the neighbor cell according to the scheduling configuration information, and acquiring information about the interference signal; and, performing, by the terminal, interference cancellation and / or interference suppression on the detected interference signal according to the information about the interference signal.

The invention relates to a cross-layer wireless sensor network MAC protocol communication method and system and belongs to the technical field of wireless sensor networks. A network is divided into zones of different classes according to different skip distances between nodes and SINK nodes. A working manner that periodic scheduling is performed on nodes in all regions is adopted and each period is divided into a periodic data receiving time frame, a periodic data transmitting time frame and a periodic sleep time frame. Periodic scheduling of nodes of adjacent zones is set in a staggered mode and data are transmitted to nodes at the low class until the SINK nodes. The requirement for synchronization of the network nodes is lowered and waiting time delay of data transmission of each skip is reduced. The class of the nodes is used for selecting receiving nodes in the data transmission process and an MAC and a router of data transmission are combined together. Thus, support of an upper-layer routing protocol is not needed, control expenses are reduced and the cross-layer wireless sensor network MAC protocol communication method and system are easy to achieve.

Techniques described herein generally relate to multi-core processors including two or more processor cores. Example embodiments may set forth devices, methods, and computer programs related to calculating a clock rate for one or more of the processor cores in the multi-core processor. One example method may include determining a first estimated workload for a first processor core and a second estimated workload for a second processor core within a scheduling interval in a periodic scheduling environment. In addition, a first clock rate for the first processor core may be calculated based on one or more of the first estimated workload, a maximum clock rate supported by the multi-core processor and / or the scheduling interval. Similarly, a second clock rate for the second processor core may also be calculated based on one or more of the second estimated workload, the maximum clock rate, and / or the scheduling interval.

The invention belongs to the field of control of an electric vehicle, particularly a feedback comprehensive dynamic scheduling networked control apparatus for the electric vehicle. The feedback comprehensive dynamic scheduling networked control apparatus for the electric vehicle comprises a comparison module, a controller module, a periodic scheduling module, a priority scheduling module and an integration module; the comparison module is connected with a driver instruction apparatus and a direct connected sensor, and meanwhile, the comparison module is connected with each sensor of the vehicle by a CAN (Controller Area Network) network; the output end of the comparison module is respectively connected with the priority scheduling module, the periodic scheduling module and the controller module; the output ends of the priority scheduling module, the periodic scheduling module and the controller module are respectively connected with the integration module; and the integration module is connected with a vehicle actuator by the CAN network. The control apparatus adopts multi-parameter comprehensive dynamic regulation based on vehicle control performance feedback, not only achieves inhibition on influence of network-induced delay on system control real-time performance, but also reduces a network data transmission quantity and improves the network transmission priority preemption problem, and is very beneficial to system expansion.

The invention belongs to the field of aerospace communication, and designs a TTE network offline scheduling table generation method suitable for existence of response constraints in order to introduceTT response constraints. Therefore, the technical scheme adopted by the invention is as follows: the TTE network offline scheduling method based on the response constraints comprises the steps that 1) TTE mixed flow partition scheduling is carried out; 2) a periodic scheduling table design principle is based on a TT information constraint response periodic scheduling table under a basic scheduling mode of TTE mixed flow partition scheduling; considering the constraint response of the TT information is introduced; the priority condition of the TT information response is added into the generation factor of the periodic scheduling table; and meanwhile, the strategy that all TT information is firstly generated into a composite scheduling table and then issued to each port node is adopted, sothat the generation process of the periodic scheduling table is simplified. The method provided by the invention is mainly applied to aerospace communication occasions.

A method and apparatus of scheduling jobs each having respective (i) length of execution time and (ii) requested frequency of occurrence includes for each given job, allocation of a respective set of start times in a cycle in a manner that evenly spreads the given jobs over the cycle. Idle time slots are added or padded into the cycle in a manner which reduces jitter (i.e., the differences in spacing between consecutive occurrences of the same job). The method and apparatus enable a balance between period approximation and jitter reduction to be optimally achieved.

A supervisory communications node monitors and controls communications with a plurality of remote devices throughout a widely distributed network. A method, system, and computer program product are provided to convey and maintain information used to synchronize the packetization and burst operations within the network. During session setup, jitter constraints indirectly are used to explicitly communicate a synchronization timing reference. The timing reference is set at the beginning of a phase / period boundary used to service the session. In an embodiment, the announcement of the first grant is used as an explicit indication of the synchronization timing reference value. In another embodiment, the synchronization timing reference value is inferred if a remote device receives contiguous voice grants meeting certain conditions. In an embodiment implementing periodic scheduling, the actual arrival of the first grant is used to infer the synchronization timing reference value. In an embodiment, the present invention enables the synchronization timing reference value and / or the periodicity to be modified if network conditions indicate that packetization and burst operations are out-of-synchronization.

The invention relates to a cross-layer wireless sensor network MAC protocol communication method and system and belongs to the technical field of wireless sensor networks. A network is divided into zones of different classes according to different skip distances between nodes and SINK nodes. A working manner that periodic scheduling is performed on nodes in all regions is adopted and each period is divided into a periodic data receiving time frame, a periodic data transmitting time frame and a periodic sleep time frame. Periodic scheduling of nodes of adjacent zones is set in a staggered mode and data are transmitted to nodes at the low class until the SINK nodes. The requirement for synchronization of the network nodes is lowered and waiting time delay of data transmission of each skip is reduced. The class of the nodes is used for selecting receiving nodes in the data transmission process and an MAC and a router of data transmission are combined together. Thus, support of an upper-layer routing protocol is not needed, control expenses are reduced and the cross-layer wireless sensor network MAC protocol communication method and system are easy to achieve.

A wireless communication system includes an access point (AP for short) and at least one station. The AP sends periodic scheduling indicators, compression indicators and scheduling information to the station. The periodic scheduling indicator indicates whether periodic transmission is scheduled for the station, and the compression indicator indicates whether the scheduling information for the station is compressed scheduling information. The station determines complete scheduling information from the periodic scheduling indicator, the compression indicator, and the scheduling information. Then, the station sends a packet to the AP according to the complete scheduling information. Signalling overhead is thus reduced.

The invention provides a method and system for carrying out non-periodic scheduling through a physical downlink control channel (PDCCH). A processing procedure of a base station comprises the following steps: A1, sending a scheduled configuration signaling to user equipment (UE) by a base station through the PDCCH, wherein the time of sending the scheduled uplink signaling is stipulated in the scheduled configuration signaling; B1, detecting that whether the scheduled uplink signaling from the UE is received or not by the base station at the time of sending the scheduled uplink signaling, constructing a new scheduled configuration signaling if the scheduled uplink signaling from the UE is received and returning to the step A1, or resending the same scheduled configuration signaling to the UE by the base station through the PDCCH if the scheduled uplink signaling from the UE is not received and repeatedly implementing the step B1. The invention further provides other methods and systems of carrying out non-periodic scheduling through the PDCCH. The scheme of the invention can be used for confronting the influence of wireless channel decline and improving the service capacity decline caused by missed detection or false detection of the scheduled configuration signaling.

The invention belongs to the technical field of computer networks, and specifically discloses a periodic scheduling method in a high-performance network. The method of the present invention includes for a given batch of multiple user reservation requests under the constraints of the maximum transmission bandwidth of the local area network and the deadline, the present invention aims to find out the number of flexible paths in the transmission time slot, and utilize the flexible bandwidth For transmission, the scheduling method provided by the present invention can process more requests with the minimum bandwidth consumption ratio and the minimum average completion time.