RACH Configuration Negotiation in IAB Enhanced Duplex Networks
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Solution Overview
Problem
In integrated access and backhaul (IAB) networks, wireless nodes operating in enhanced duplex mode face complexity in coordinating communication parameters for concurrent signals associated with random access channel (RACH) procedures, leading to potential interference due to the large quantity of parameters involved in RACH configurations.
Innovation Solution
A wireless node receives indications of communication link configurations and RACH configurations from other nodes, and transmits requests to modify these configurations to mitigate interference, either directly or through a central unit, to align timing, power, and beam settings, thereby reducing complexity and interference in enhanced duplex mode operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wireless node operates in enhanced duplex mode with RACH procedures, then concurrent communication capability is improved, but coordination complexity increases due to large quantity of RACH parameters
Solution Approach 1:
The patent segments the RACH configuration parameters into multiple groups (first set of parameters, second set of parameters, third set of parameters) that can be independently controlled and coordinated. This segmentation allows the wireless node to manage different aspects of RACH configuration separately, reducing the overall coordination complexity while maintaining concurrent communication capability.
Solution Approach 2:
The patent introduces a parent node as an intermediary that receives coordination requests from child nodes and manages the RACH configuration parameters. This intermediary approach centralizes the coordination function, allowing the parent node to optimize parameter settings across multiple child nodes simultaneously, thereby reducing individual node complexity while enabling concurrent communications.
2Object-affected harmful factors
If RACH configuration parameters are coordinated for enhanced duplex mode, then interference is reduced, but signaling overhead increases
Solution Approach 1:
The patent combines multiple RACH configuration parameters into grouped sets that are transmitted and coordinated together rather than individually. By merging related parameters into unified configuration messages, the patent reduces the number of separate signaling interactions required, thereby lowering signaling overhead while still achieving comprehensive interference reduction through coordinated parameter management.
3Reliability
If multiple sets of RACH parameters are configured for different communication links, then communication performance is improved, but configuration complexity increases
Solution Approach 1:
The patent applies local quality by configuring different sets of RACH parameters tailored to specific communication links and their individual requirements. Each child node receives customized parameter sets optimized for its particular communication conditions, improving communication performance for each link while the modular parameter grouping keeps overall configuration complexity manageable through systematic organization.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first wireless node may receive an indication of a configuration of one or more communication links associated with an enhanced duplex mode of at least one of the first wireless node or a second wireless node. The first wireless node may receive an indication of a random access channel (RACH) configuration associated with the second wireless node. The first wireless node may transmit a request to modify the RACH configuration, where the request to modify the RACH configuration is based at least in part on the configuration of the one or more communication links and the RACH configuration. Numerous other aspects are provided.