Wireless Channel Sensing with Time-Based Subsets for SBFD Access
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Solution Overview
Problem
Existing channel sensing solutions in subband full duplex (SBFD) scenarios are inadequate, leading to inefficiencies and potential interference issues, and there is a need for improved methods to enhance compatibility and reduce hardware complexity.
Innovation Solution
A unified channel sensing approach is introduced, where channel subsets are defined based on the time domain resources of wireless signals, allowing for efficient channel sensing and increased access probability by configuring channel sets that do not overlap in the frequency domain and are dependent on the time domain resources of the wireless signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing channel sensing solutions are used in SBFD scenarios, then compatibility with traditional systems is maintained, but channel sensing efficiency deteriorates and interference issues arise
Solution Approach 1:
The patent segments the channel sensing process by defining separate channel sets for different time domain resources. Specifically, it divides channels into those that can be sensed during uplink time domain resources versus those that cannot, allowing targeted sensing strategies for each segment. This segmentation resolves the contradiction by enabling efficient sensing where applicable while maintaining reliability through appropriate sensing avoidance where interference would occur.
Solution Approach 2:
The patent introduces dynamic channel subset selection based on time domain resource characteristics. The channel subset is not fixed but adapts according to whether the current time domain resource is configured for uplink transmission. This dynamic approach allows the system to optimize sensing efficiency when conditions permit while automatically preventing interference when uplink resources are active, thus resolving the efficiency-reliability contradiction.
2Adaptability or versatility
If channel sensing is executed on all channels in the first channel set, then comprehensive channel access is achieved, but hardware complexity increases
Solution Approach 1:
The patent extracts and excludes specific channels from the channel sensing process based on time domain resource configuration. When a time domain resource is configured for uplink, the corresponding channels are extracted from the sensing set, reducing the number of channels that require sensing. This extraction principle maintains comprehensive access probability for downlink channels while significantly reducing hardware complexity by eliminating unnecessary sensing operations on uplink channels.
Solution Approach 2:
The patent creates a universal channel sensing framework that adapts to different time domain resource configurations. The same channel set definition mechanism serves multiple functions: it identifies channels for sensing during downlink resources, automatically excludes channels during uplink resources, and maintains compatibility with traditional sensing approaches. This multi-functionality achieves versatile channel access without increasing hardware complexity.
3Productivity
If channel subsets are configured for different time domain resources, then channel sensing efficiency improves, but signaling overhead increases
Solution Approach 1:
The patent merges the channel subset configuration with existing time domain resource configuration mechanisms. Rather than introducing separate signaling for channel subsets, it utilizes the existing uplink time domain resource configuration to implicitly define the channel subset. When uplink time domain resources are configured, the corresponding channel subset is automatically determined, eliminating the need for additional signaling and reducing overhead while maintaining improved sensing efficiency.
Data Source
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AI summary
The present invention discloses a method and apparatus for wireless communication. The method comprises: executing channel sensing on each channel in a first channel subset, wherein each channel in the first channel subset belongs to a first channel set; and in response to accessing each channel in the first channel subset, sending a first wireless signal on a first channel, wherein the first channel set is on a first carrier, the first channel set comprises a plurality of channels, any two channels in the first channel set do not overlap in a frequency domain, and the first channel subset depends on a time domain resource of the first wireless signal. By means of the present application, the efficiency of channel sensing can be improved, and the sending probability is improved.