Dynamic Slot Allocation in Wireless Sensor Networks
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Solution Overview
Problem
Conventional wireless sensor networks face challenges in efficiently transmitting and receiving large quantities of data in a short processing time due to limitations in time division communication methods, where only pre-assigned slots are used, leading to prolonged data transmission times and increased electricity consumption.
Innovation Solution
A wireless communication device with a decision unit that dynamically allocates additional slots based on identification information from child nodes, allowing for data transmission and reception using both basic and additional slots in time division communication, thereby increasing communication efficiency and reducing data transmission time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If time division communication with pre-assigned slots is used, then power saving performance is improved, but data transmission time increases and productivity decreases
Solution Approach 1:
The patent applies dynamics by making the slot allocation dynamic rather than static. The parent node dynamically determines additional slots based on the actual data volume from child nodes. When data volume is large, additional slots are allocated to increase transmission speed; when data volume is small, only basic slots are used to maintain power saving performance. This resolves the contradiction by adapting the communication mode to actual needs.
Solution Approach 2:
The patent changes the parameter of slot quantity from fixed to variable. By introducing additional slots beyond the basic slots, the system can adjust the total number of transmission slots according to data volume requirements. This parameter change enables the system to achieve high-speed data transmission when necessary while maintaining power efficiency during normal operation.
2Device complexity
If pre-assigned slots only are used, then device complexity is reduced, but adaptability decreases
Solution Approach 1:
The patent segments the slot allocation into two parts: basic slots that are pre-assigned for power saving, and additional slots that are dynamically allocated for high-speed transmission. This segmentation allows the system to maintain simple pre-assigned slot structures for normal operation while adding flexibility through dynamically determined additional slots, thus improving adaptability without significantly increasing overall complexity.
Solution Approach 2:
The patent applies preliminary action by pre-assigning basic slots in advance for power saving performance, then adding additional slots only when needed based on actual data volume. This approach maintains the simplicity of pre-assigned slots while introducing adaptability through conditional additional slot allocation, resolving the contradiction between complexity and adaptability.
3Quantity of substance
If larger quantity of data is transmitted using assigned slots, then data volume increases, but processing time increases
Solution Approach 1:
The patent applies dynamics by dynamically determining additional slots based on the quantity of data to be transmitted. When large quantities of data need to be transmitted, the parent node determines additional slots beyond the basic slots, enabling parallel or sequential transmission that reduces processing time. This dynamic adjustment resolves the contradiction between data quantity and processing time.
Solution Approach 2:
The patent ensures continuity of useful action by utilizing additional slots to continue data transmission without interruption or delay. When basic slots are insufficient for large data volumes, additional slots provide continuous transmission capacity, preventing the processing time from increasing proportionally with data quantity.
Data Source
AI summary
A wireless communication device according to an embodiment is a wireless communication device included in a multi-hop network in which data is relayed in multiple stages in time division communication. A decision unit decides an additional slot, based on identification information received from a child node that transmits data to the wireless communication device. A communication processing unit transmits and receives data using the additional slot and a basic slot assigned based on frame information in the time division communication.