Dynamic RACH Resource Configuration for Wireless Network Efficiency
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Solution Overview
Problem
The introduction of new features in wireless communication networks leads to RACH resource fragmentation, resulting in inefficient resource utilization and increased collision probabilities, which degrades system performance.
Innovation Solution
The proposed solution involves optimizing the allocation of contention free (CF) and contention based (CB) RACH resources by introducing conditional CFRA and CBRA resources. These resources are activated based on specific conditions, such as collision detection or timer expiration, to minimize resource reservation inefficiencies and enhance resource efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple features are supported by introducing new RACH resources, then feature capability is improved, but resource fragmentation increases and utilization efficiency deteriorates
Solution Approach 1:
The patent implements dynamic RACH resource configuration where the network can flexibly allocate resources between Contention Free (CF) and Contention Based (CB) modes based on real-time traffic conditions and feature requirements. This dynamic adaptation allows efficient resource utilization while supporting multiple features without fixed fragmentation.
Solution Approach 2:
The patent creates a unified RACH resource configuration that can serve multiple features (eMBB, URLLC, eMTC, RedCap) through a single pool of resources that can be dynamically allocated to different features based on demand, eliminating the need for separate dedicated resources for each feature.
2Reliability
If separate RACH resources are allocated for different features, then collision probability is reduced, but resource reservation inefficiency increases
Solution Approach 1:
The patent pre-configures multiple RACH resource sets (first and second sets) with different contention characteristics, allowing the network to prepare and switch between resource configurations in advance based on predicted traffic patterns and feature requirements, reducing reservation inefficiency while maintaining low collision probability.
Solution Approach 2:
The network dynamically switches between different RACH resource sets based on real-time conditions, allocating CF resources when low collision probability is critical and CB resources when resource utilization efficiency is prioritized, optimizing the trade-off between reliability and time loss.
3Loss of time
If Contention Free resources are always available, then access latency is reduced, but resource waste increases when no contention occurs
Solution Approach 1:
The patent dynamically activates or deactivates Contention Free resource sets based on network conditions and traffic patterns, ensuring CF resources are only allocated when needed for low-latency access, thereby reducing resource waste while maintaining fast access when required.
Solution Approach 2:
The network changes the availability parameter of CF resources from always-available to conditionally-available based on traffic conditions, feature requirements, and collision risk assessments, optimizing the balance between access latency and resource utilization efficiency.
Data Source
AI summary
In accordance with example embodiments of the invention there is a method and apparatus to perform at least: receiving from a serving cell of a communication network information comprising a first contention based random access channel configuration and a second random access channel configuration associated with at least a first service, wherein the second random access channel configuration is inactive and whose activation is associated with at least one activation timer; transmitting a first physical random access channel message using a resource of the first contention based random access channel configuration; determining a condition holds after reception of a network message and activating a resource of the second random access channel configuration based on the at least one activation timer; and based on the determining, transmitting a second physical random access channel message using a resource of the second random access channel configuration.