UE Sidelink Multi-Channel Access for Unlicensed Spectrum Congestion
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Solution Overview
Problem
Existing wireless communication systems face interference and congestion issues due to increased demand for mobile broadband access, particularly in unlicensed spectrum, which affects downlink and uplink transmissions and degrades performance.
Innovation Solution
Implementing a multi-channel access procedure for sidelink communication based on user equipment (UE) capability, allowing for simultaneous access to multiple channel bandwidths using listen-before-transmitting (LBT) procedures and resource block (RB) set configurations to optimize sidelink channel transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple UEs access the unlicensed spectrum simultaneously to meet growing mobile broadband demand, then network capacity and data throughput increase, but interference and congestion increase, degrading transmission performance
Solution Approach 1:
The patent segments the unlicensed spectrum into multiple channel bandwidths (e.g., 20 MHz channels) that can be independently accessed. Each UE can select specific channel bandwidths based on its capability and channel conditions, dividing the congested spectrum into manageable segments that reduce overall interference and improve network capacity
Solution Approach 2:
The patent changes the parameter of channel bandwidth utilization by allowing UEs to access multiple different bandwidths simultaneously rather than sharing a single channel. This parameter change enables more efficient spectrum utilization, increasing network capacity while managing interference through diverse frequency selection
2Productivity
If existing NR-U multi-channel access procedures are used for sidelink communication, then downlink and uplink transmissions benefit from multi-channel access, but sidelink communication performance degrades due to all-or-nothing access requirements
Solution Approach 1:
The patent introduces dynamic sidelink multi-channel access where UEs can flexibly select and access different channel bandwidths based on real-time channel conditions, UE capabilities, and communication requirements. This dynamic approach replaces the rigid all-or-nothing access, allowing UEs to adaptively optimize sidelink performance while maintaining ease of operation
Solution Approach 2:
The patent changes the access mode parameter from all-or-nothing to partial access, allowing UEs to transmit on subsets of available channel bandwidths. This parameter change enables finer-grained control over sidelink resources, improving both data throughput and operational flexibility
3Device complexity
If all-or-nothing multi-channel access is implemented for sidelink, then channel access is simplified, but transmission efficiency decreases when some channel bandwidths are unavailable
Solution Approach 1:
The patent applies partial action by allowing UEs to access only the subset of channel bandwidths that are currently available and suitable, rather than requiring all channels to be accessible. This partial access approach maintains simplified procedures while improving transmission efficiency by utilizing whatever bandwidth is available
Data Source
AI summary
This disclosure provides systems, methods, and devices for wireless communication that support multi-channel access with respect to sidelink communication based on user equipment (UE) capability. In a first aspect, a UE providing sidelink transmission may implement sidelink unlicensed spectrum (SL-U) operation in which a multi-channel access procedure facilitates simultaneous access with respect to a plurality of different channel bandwidths in the unlicensed spectrum. Implementation of a particular SL-U multi-channel access procedure and/or UE capability independent from UE capability for multiple simultaneous transmissions. SL-U multi-channel access may facilitate transmission of a single sidelink channel over multiple channel bandwidths within a slot and/or transmission of multiple sidelink channels over multiple channel bandwidths within a slot. Other aspects and features are also claimed and described.