On-Demand RACH Configuration Activation for Variable Access Loads
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in managing random access channel (RACH) resource utilization due to infrequent updates in RACH configurations, leading to suboptimal handling of changing access loads and resource wastage.
Innovation Solution
Implementing an on-demand RACH procedure that allows dynamic activation of RACH resources based on UE requests, enabling RACH partitioning and network energy savings through targeted resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RACH configurations are updated infrequently to maintain system stability, then system reliability is improved, but RACH resource utilization efficiency deteriorates due to inability to adapt to changing access loads
Solution Approach 1:
The patent implements dynamic RACH configuration updates by introducing a network entity that receives indication information from UEs about their access load conditions and subsequently updates RACH configurations in real-time. This transforms the static, infrequent configuration updates into a dynamic system that adapts to changing access loads, resolving the contradiction between system stability and resource utilization efficiency.
Solution Approach 2:
The patent establishes a feedback mechanism where UEs transmit indication information to the network entity regarding their access load status. The network entity uses this feedback to determine whether configuration updates are needed and sends updated configurations back to UEs. This closed-loop feedback system enables the network to respond to actual access load conditions, improving resource utilization while maintaining stability through controlled update triggering.
2Ease of operation
If RACH resources are allocated statically to all UEs, then ease of operation is improved, but energy waste increases due to allocation of unused resources
Solution Approach 1:
The patent applies local quality by differentiating RACH resource allocation based on specific UE conditions. Instead of uniform static allocation, the network entity provides different RACH configurations to different UEs based on their individual access load indications. This allows resources to be allocated according to actual needs of each UE, reducing energy waste while maintaining operational simplicity through automated differentiation.
Solution Approach 2:
The patent changes the RACH configuration parameters dynamically based on UE access load conditions. The network entity receives indication information from UEs and updates configuration parameters such as RACH occasions, preambles, or timing advance values accordingly. This parameter adaptation enables the system to allocate resources efficiently based on actual usage patterns, reducing energy waste while keeping the allocation process simple through automated parameter adjustment.
3Productivity
If multiple RACH configurations are maintained for different UE types to optimize resource allocation, then RACH resource utilization efficiency is improved, but device complexity increases due to multiple configuration management requirements
Solution Approach 1:
The patent implements self-service by enabling UEs to autonomously determine their access load conditions and transmit indication information to the network entity. Each UE independently assesses its own needs and requests appropriate configuration updates, eliminating the need for complex centralized classification and allocation logic. This self-service approach improves resource utilization efficiency while reducing overall system complexity by distributing the decision-making process to individual UEs.
Solution Approach 2:
The patent applies preliminary action by having UEs pre-assess their access load conditions and prepare indication information before requesting configuration updates. This advance preparation allows the network entity to process configuration updates efficiently without requiring complex real-time analysis, thereby improving resource allocation efficiency while managing device complexity through structured preliminary assessment and reporting.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may request activation of a random access channel (RACH) configuration via an on-demand RACH procedure. The UE may receive a control message indicating that a network entity supports multiple random access channel (RACH) configurations. The UE may transmit a first message including a first identifier of a first RACH configuration of the multiple RACH configurations based on a trigger condition for requesting activation of the first RACH configuration being satisfied, the first RACH configuration being associated with a first RACH procedure. The UE may receive a response to the first message, the response including the first identifier of the first RACH configuration to indicate the activation of the first RACH configuration responsive to the first message including the first identifier of the first RACH configuration.