45 results about "Periodic scheduling" patented technology

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.

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.