Beam-Based Channel Access Procedure Selection
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Solution Overview
Problem
Existing channel access procedures in wireless communication systems are inefficient in determining channel availability, leading to increased latency, reduced system capacity, and suboptimal reuse of spatial resources.
Innovation Solution
The proposed solution involves determining the type of channel access procedure based on the available transmission beam group and the transmission beam, allowing for more efficient channel access by optimizing channel availability, latency, system capacity, and spatial resource reuse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standard channel access procedure is used for all transmission beams, then the procedure is simple to implement, but channel availability is reduced and latency increases
Solution Approach 1:
The patent applies local quality by assigning different channel access procedure types (first type with shorter sensing time or no sensing, second type with longer sensing time) to different transmission beams based on their specific characteristics and spatial relationships. This allows each beam to use the most appropriate access procedure for its conditions, improving overall channel availability without requiring all beams to use complex procedures.
Solution Approach 2:
The patent implements dynamics by making the channel access procedure type variable rather than fixed. The system dynamically selects between first and second type procedures based on real-time conditions including beam direction, beam group availability, and spatial resource reuse opportunities, thereby optimizing channel access adaptively.
2Reliability
If a longer channel access procedure is used to ensure channel availability, then reliability is improved, but latency increases and system capacity is reduced
Solution Approach 1:
The patent applies parameter changes by varying the channel access procedure type parameter between first type (shorter or no sensing) and second type (longer sensing) based on transmission beam characteristics. This parameter variation allows the system to achieve necessary reliability only when longer procedures are needed, rather than always using them, thereby reducing overall latency.
Solution Approach 2:
The patent segments the channel access procedure into different types (first and second type) with different sensing time characteristics. This segmentation allows selective application of shorter or longer procedures to different beams, preventing the latency penalty of long procedures from affecting all transmissions unnecessarily.
3Productivity
If channel access procedures do not consider transmission beam groups, then the procedure is simpler, but spatial resource reuse is suboptimal
Solution Approach 1:
The patent introduces a spatial dimension by considering transmission beam groups and directional relationships in determining channel access procedures. Instead of treating all beams uniformly, the system evaluates spatial resource availability and beam group configurations, adding a spatial dimension to the channel access decision-making process that enables better resource reuse.
Solution Approach 2:
The patent applies local quality by making channel access procedure determination specific to each transmission beam's spatial characteristics and beam group membership. This localized approach allows beams in different spatial configurations to use appropriately optimized procedures, improving spatial resource reuse without requiring system-wide complexity.
Data Source
AI summary
A communication device may use a channel access procedure to determine channel availability for signal transmission. The communication device may select a channel access procedure, among a plurality of channel access procedures, based on a beam indication from a base station and a transmission beam to be used for the signal transmission.