Channel Sensing Enhancement for Wireless Power Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems using unlicensed bands, the frequent need for channel sensing to avoid interference leads to excessive battery consumption and energy waste, particularly due to region-specific minimum channel occupation times that require continuous measurement every 1ms.
Innovation Solution
Implementing a method where devices can indicate their occupation time periods, allowing other devices to suspend channel sensing during these times, thereby reducing unnecessary measurements and conserving power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channel sensing is performed every 1ms to detect available resources in unlicensed band, then interference avoidance capability is improved, but battery consumption and energy waste increase excessively
Solution Approach 1:
The transmitting device performs channel sensing in advance before actual data transmission and informs the receiving device of the sensing result and occupation time. This preliminary action allows the receiving device to avoid unnecessary channel sensing during the indicated occupation period, thereby reducing energy consumption while maintaining reliable interference avoidance.
Solution Approach 2:
The transmitting device acts as an intermediary by providing channel availability information to the receiving device. This intermediary information transfer enables the receiving device to make informed decisions about channel sensing, eliminating redundant sensing operations and reducing overall system energy consumption.
2Loss of time
If channel sensing is performed frequently to ensure up-to-date channel availability information, then transmission opportunity detection is improved, but energy waste increases
Solution Approach 1:
The transmitting device performs channel sensing in advance and communicates the result to the receiving device, including the occupation time period. This allows the receiving device to skip sensing during the indicated period and only sense when necessary, reducing energy waste while maintaining timely detection of transmission opportunities.
Solution Approach 2:
Instead of continuous periodic sensing every 1ms, the system transitions to event-driven sensing where the receiving device suspends sensing during indicated occupation periods and resumes only when needed. This transforms frequent periodic action into selective periodic action, reducing energy consumption while maintaining transmission opportunity detection.
Data Source
Figure 1~2
Figure 3a~3b
Figure 4a~4b
AI summary
The subject matter described herein relates to measurement enhancement in wireless communication. A device informs other devices about the time period during which a channel will be occupied by its transmission, if the device determines to transmit on the channel. A set of occupation time periods can be defined, and then the device can indicate one of the defined occupation time periods to other devices. Upon detection of the indication of the occupation time period, other devices get to know that the channel will be unavailable in at least the indicated time duration, and thus can avoid unnecessary channel sensing or measurement in this time duration to save power.