Dynamic Secondary Random Access Resource Allocation
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Solution Overview
Problem
In wireless communication systems, the high proportion of Physical Random Access Channel (PRACH) resources leads to increased costs and resource wastage, limiting the improvement of random access procedure performance due to the high occupancy of resources and inefficient management of PRACH resources, especially in 5G communication systems using higher frequency bands.
Innovation Solution
Implementing a method where a secondary random access procedure can be performed using secondary RA resources configured independently or overlapping with primary RA resources, allowing for dynamic allocation based on load conditions, reducing the load of the primary RA procedure and minimizing resource wastage by activating secondary RA resources only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PRACH resources are increased to improve random access procedure performance, then the success probability of random access is improved, but the cost and resource wastage increase
Solution Approach 1:
The patent implements dynamic activation of secondary RA resources based on load conditions. The base station activates secondary RA resources only when the load on primary RA resources exceeds a threshold, making the system adaptable to varying traffic conditions rather than statically allocating resources, thus improving success probability only when needed while minimizing resource wastage during low-load periods
Solution Approach 2:
The patent changes the operational state of RA resources by introducing activation and deactivation mechanisms. Secondary RA resources are configured but not always active; their activation status is dynamically changed based on load conditions, allowing the system to optimize between reliability and resource efficiency by adjusting resource availability parameters rather than maintaining fixed resource allocation
2Reliability
If PRACH resources are reserved to ensure random access capability, then the random access procedure can be supported, but unnecessary radio resources are wasted
Solution Approach 1:
The patent makes RA resource allocation dynamic by introducing load-based activation of secondary resources. Instead of reserving all RA resources continuously, the system reserves secondary resources that can be activated only when needed based on measured load conditions, thus maintaining random access capability while reducing the quantity of actively used radio resources
Solution Approach 2:
The patent performs preliminary configuration of secondary RA resources without immediate activation. The resources are prepared and configured in advance but remain inactive until load conditions trigger their activation, allowing the system to have ready-access resources available without consuming them continuously, thus balancing capability assurance with resource conservation
3Productivity
If more RA occasions are configured to reduce RA procedure load, then the performance of RA procedure is improved, but the proportion of PRACH resources increases
Solution Approach 1:
The patent implements dynamic load distribution across multiple RA occasions by activating secondary RA resources only when primary resources become overloaded. This dynamic approach allows the system to maintain good RA procedure performance during high-load periods by distributing traffic across multiple occasions, while keeping the proportion of actively used PRACH resources low during normal operating conditions
Data Source
AI summary
An operation method of a terminal in a communication system may include: receiving, from a base station, primary RA configuration information for a primary RA procedure; receiving, from the base station, secondary RA configuration information for a secondary RA procedure; transmitting a primary RA preamble to the base station by using a primary RA resource indicated by the primary RA configuration information; receiving, from the base station, secondary RA indication information in response to the primary RA preamble, the secondary RA indication information indicating to perform the secondary RA procedure instead of the primary RA procedure; and transmitting a secondary RA preamble to the base station by using a secondary RA resource indicated by the secondary RA configuration information.