Listen-Before-Talk Channel Access Priority Class Mapping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current Listen-Before-Talk (LBT) procedures in wireless communication networks often result in unnecessary, inconsistent, and incompatible delays due to defaulting to a lowest priority Channel Access Priority Class (CAPC) for transmissions that do not include User Plane data payloads, leading to unfavorable mismatches between CAPC and payload priority.
Innovation Solution
Implementing a method that selects a channel access priority class (CAPC) based on the type of transmission payload, using a mapping that associates different types of payloads with respective CAPCs, ensuring that the selected CAPC is higher than the lowest priority CAPC, thereby optimizing channel access procedures for various types of transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a lowest priority Channel Access Priority Class (CAPC) is defaulted for transmissions without User Plane data payloads, then the LBT procedure is simplified and consistent, but unnecessary delays occur and channel access efficiency deteriorates
Solution Approach 1:
The patent applies local quality by assigning different CAPC values to different transmission payload types. Instead of using a uniform lowest priority CAPC for all transmissions, the system selectively assigns appropriate priority levels based on the specific payload characteristics, thereby optimizing channel access delay for each transmission type while maintaining procedural consistency through defined mapping rules.
Solution Approach 2:
The patent changes the CAPC parameter dynamically based on the transmission payload type. By establishing a mapping relationship between payload types and corresponding CAPC values, the system adjusts the channel access priority parameter to match the actual transmission requirements, reducing unnecessary delays while maintaining operational consistency through standardized mapping procedures.
2Adaptability or versatility
If a lowest priority CAPC is used for all transmissions including control plane messages and random access preambles, then the channel access procedure is standardized, but the priority mismatch between CAPC and payload importance increases
Solution Approach 1:
The patent implements local quality by tailoring the CAPC assignment to the specific characteristics of each transmission payload type. Control plane messages, random access preambles, and other non-user plane transmissions are assigned appropriate priority levels through a defined mapping relationship, ensuring that the channel access priority reflects the actual importance and urgency of each transmission type.
Solution Approach 2:
The patent introduces dynamics into the previously static CAPC assignment by making the priority level adaptive to the transmission payload type. The mapping mechanism enables the system to dynamically select appropriate CAPC values based on the specific transmission requirements, thereby improving priority alignment accuracy while maintaining procedural standardization through consistent mapping rules.
3Productivity
If different CAPCs are selected based on transmission payload types, then channel access efficiency and priority alignment improve, but the complexity of CAPC selection and mapping increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing a mapping relationship between transmission payload types and corresponding CAPC values. This mapping table or configuration is prepared in advance, allowing the system to quickly determine the appropriate CAPC based on the payload type without requiring complex real-time decision-making, thereby improving channel access efficiency while minimizing selection complexity.
Solution Approach 2:
The patent introduces an intermediary mapping mechanism that bridges the gap between transmission payload types and CAPC values. This mapping layer acts as a simplified interface that translates payload characteristics into appropriate priority levels, reducing the complexity of direct CAPC selection while improving overall channel access efficiency through systematic priority assignment.
Data Source
AI summary
An enhanced LBT procedure (200) mitigates unnecessary delays in delivering transmissions between User Equipment and base stations over unlicensed spectrum. A UE or base station selects a particular CAPC corresponding to an intended transmission (225) based on an intelligent mapping of different types of transmission payload (e.g., transmission payload other than or in in addition to pre-defined, QoS-related UP message data payload) to different CAPCs. Most (if not all) of the mapped CAPCs corresponding to the different types of transmission payload are of a higher priority than a lowest priority CAPC (212-222), resulting in channel access procedures that are more commensurate with respective transmission payloads. The intelligent mapping may indicate different priorities among different types of transmission payload and/or different types of messages, and/or may indicate which type of transmission is to govern selection of a CAPC when multiple types of transmission payload are included in a single, intended transmission.