Two-Step RACH Reconfiguration for Flexible Uplink Access
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently adapting two-step random access channel (RACH) procedures, particularly in managing the complexity and overhead associated with combining RACH and PUSCH occasions, which can increase latency and energy consumption.
Innovation Solution
A method and apparatus for dynamically modifying the configuration of two-step RACH procedures by adjusting the quantity and timing of RACH and PUSCH occasions based on received messages, allowing for flexible and efficient resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the configuration of two-step RACH procedures is made adaptable to changing conditions, then system flexibility and efficiency are improved, but the complexity of managing RACH and PUSCH occasions increases
Solution Approach 1:
The patent implements dynamic configuration of RACH parameters through received messages that modify the random access configuration. The network can dynamically adjust the quantity of RACH occasions, PUSCH occasions, and associated parameters based on current system conditions, transforming a static configuration into an adaptable one without requiring complex manual management
Solution Approach 2:
The patent changes key parameters of the RACH procedure including the quantity of RACH occasions, quantity of PUSCH occasions, time domain offsets, and frequency domain resources. These parameter modifications are transmitted through messages that update the UE configuration, enabling adaptability while managing complexity through standardized parameter sets
2Productivity
If more RACH and PUSCH occasions are combined in the two-step procedure, then communication capability is enhanced, but signaling overhead and energy consumption increase
Solution Approach 1:
The patent applies partial action by configuring only the necessary number of RACH and PUSCH occasions required for successful random access, rather than providing excessive resources. The network dynamically determines the appropriate quantity of occasions based on current load and conditions, transmitting modified configurations that optimize resource usage and reduce energy consumption while maintaining adequate communication capability
3Productivity
If the configuration of RACH occasions is made flexible through message modifications, then resource allocation efficiency is improved, but the processing complexity at the UE increases
Solution Approach 1:
The patent segments the RACH configuration into distinct parameter sets that can be independently modified through received messages. The configuration is divided into RACH-specific parameters, PUSCH-specific parameters, and association parameters, allowing the UE to process modifications in a structured manner and reducing overall processing complexity while maintaining flexible resource allocation
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive one or more first messages that indicate a set of parameters of a random access channel (RACH) configuration for a two-step RACH procedure for the UE. The set of parameters may indicate uplink transmission occasions of the two-step RACH procedure that are available for uplink transmission of one or more RACH preambles, one or more physical uplink shared channel (PUSCH) transmissions, or both. The UE may then receive one or more second messages that modify at least one parameter of the RACH configuration, which modifies the uplink transmission occasions allocated for transmission of the one or more RACH preambles, the one or more PUSCH transmissions, or both. The UE may then transmit one or more uplink messages based on the modification of the at least one parameter of the RACH configuration.