Common Channel Sensing for IAB Nodes
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Solution Overview
Problem
Integrated access and backhaul (IAB) nodes in wireless communications face inefficiencies in channel sensing procedures, particularly when operating in shared spectrum environments, as they often require separate channel sensing processes for upstream and downstream communications, leading to increased latency and reduced spectral efficiency.
Innovation Solution
Implementing a common channel sensing procedure that allows IAB nodes to perform energy detection across both MT and DU roles using a shared antenna panel and aligned radio frequency footprints, thereby simplifying channel access and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate channel sensing procedures are performed for upstream and downstream communications, then channel access reliability is improved, but channel access time increases and spectral efficiency decreases
Solution Approach 1:
The patent combines separate channel sensing procedures for upstream (MT role) and downstream (DU role) communications into a single common channel sensing procedure. The IAB node performs one energy detection process that simultaneously determines channel availability for both transmission directions, eliminating the need for sequential sensing operations and reducing total channel access time while maintaining reliable channel access through unified threshold comparison
2Measurement precision
If separate channel sensing procedures are performed for upstream and downstream communications, then channel access accuracy is improved, but spectral efficiency decreases
Solution Approach 1:
The patent implements a universal channel sensing mechanism that serves multiple functions simultaneously - it detects channel availability for both upstream and downstream communications through a single energy detection process. The common sensing procedure uses unified detection parameters and thresholds to accurately assess channel conditions for dual-role operations, eliminating redundant sensing operations and improving spectral efficiency while preserving measurement accuracy through comprehensive energy detection
3Productivity
If common channel sensing procedure is implemented, then spectral efficiency is improved, but device complexity increases
Solution Approach 1:
The patent segments the channel sensing functionality into distinct configurable components including energy detection modules, threshold comparison units, and role-specific configuration parameters. This modular architecture allows the common channel sensing procedure to be implemented with clear functional boundaries and independent parameter sets for MT and DU roles, reducing implementation complexity while enabling flexible adaptation to different operational scenarios through selective parameter configuration
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances spectral efficiency and data rates by minimizing channel access time and maintaining accurate channel sensing, while allowing for flexible configuration based on node conditions.
Implementation Method 1
performing a channel sensing procedure at the wireless device apparatus, where the channel sensing procedure is common to the first wireless role and the second wireless role
Data Source
AI summary
This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer storage media, for performing a common channel sensing procedure for transmissions via a mobile termination (MT) role or via a distributed unit (DU) role of an integrated access and backhaul (IAB) node, or both. In one aspect, the IAB node may obtain channel access for transmissions via the MT role or the DU role, or both, using the same channel sensing procedure. The IAB node may select a timing of a sensing slot for the common channel sensing procedure in accordance with a capability of the IAB node and a timing of the transmissions. The IAB node may initiate a channel occupancy time (COT) for the transmissions via the MT role or the DU role, or both, as a result of determining that a measured energy detection (ED) value satisfies an ED threshold.