Multi-hop Radio Device Scheduling for Power Reduction
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Solution Overview
Problem
Radio communication systems in multi-hop networks face increased power consumption and reduced battery life due to the need for separate timing slots for uplink and downlink communications, which limits the sleep state of radio devices and requires frequent battery replacements.
Innovation Solution
Implementing a scheduling method where radio devices allocate hop counts to frames in both uplink and downlink periods, allowing simultaneous transmission and reducing the number of data transmissions, thereby extending the sleep state and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate timing slots are scheduled for uplink and downlink communications, then communication control is simplified, but power consumption increases and battery life decreases
Solution Approach 1:
The patent merges the uplink and downlink communication slots into a single simultaneous transmission timing. The scheduling device allocates both uplink and downlink communications to the same time slot, allowing radio devices to transmit uplink data and receive downlink data simultaneously. This eliminates the need for separate timing slots and extends the sleep state duration, thereby reducing power consumption while maintaining simplified communication control.
2Productivity
If uplink and downlink communication slots are scheduled at different timings, then transmission processing is complete, but the number of transmissions increases leading to shorter sleep state
Solution Approach 1:
The patent combines multiple transmission operations into a single time slot. The scheduling device assigns both uplink and downlink communications to the same timing, enabling the radio device to complete both transmission processing tasks simultaneously. This reduces the total number of separate transmissions and extends the sleep state duration, resolving the contradiction between productivity and sleep state duration.
3Use of energy by moving object
If simultaneous timing allocation is implemented for uplink and downlink, then power consumption is reduced, but only some radio devices can benefit while others cannot
Solution Approach 1:
The patent implements a dynamic scheduling mechanism where the scheduling device can flexibly allocate timing slots based on the specific requirements of each radio device. The system can dynamically adjust which radio devices receive simultaneous timing allocation for uplink and downlink communications, allowing the benefit to be extended to all devices in the network over time through adaptive scheduling decisions.
Data Source
AI summary
A radio communication system according to an embodiment includes a plurality of radio devices constituting a multi-hop network. The radio devices each include a hardware processor and perform management by synchronizing a timing of an uplink period including X frames and a timing of a downlink period including Y frames. X and Y are different values. The radio devices each allocate the hop count of each radio device of the plurality of radio devices to at least one frame in the uplink period and at least one frame in the downlink period. The radio devices each transmit uplink data in the frame to which the hop count of the own radio device is allocated in the uplink period. The radio devices each transmit downlink data in the frame to which the hop count of the own radio device included in the downlink period is allocated.