Dynamic PRACH Control Region Signaling for 5G NR Resource Optimization
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Solution Overview
Problem
Current PRACH solutions in 5G NR communications lack customization for PRACH transmissions, leading to inefficient use of control symbols, which may result in conservative approaches that do not optimize resource utilization.
Innovation Solution
The method involves signaling a dynamic control region for PRACH transmission, where a network device generates and transmits an indication to user equipment (UE) specifying the number of symbols to use for PRACH transmission, allowing for flexible adjustment based on available time resources and collision scenarios, thereby optimizing the use of control symbols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed number of control symbols is allocated for PRACH transmission, then the system ensures reliable PRACH transmission in worst-case scenarios, but resource utilization efficiency deteriorates due to conservative allocation
Solution Approach 1:
The patent implements dynamic control region signaling where the number of control symbols for PRACH transmission is no longer fixed but can be adjusted based on actual system conditions. The network device dynamically determines the control region size and signals it to the UE, allowing the system to adapt between conservative allocation (for reliability) and efficient allocation (for productivity) depending on traffic conditions and collision scenarios.
Solution Approach 2:
The patent changes the parameter of control symbol allocation from a static fixed value to a dynamic variable that can be adjusted through signaling. By introducing flexible parameter adjustment mechanisms, the system can optimize the balance between reliability and resource efficiency by modifying the control region size according to actual needs rather than always using worst-case assumptions.
2Productivity
If dynamic control region signaling is implemented for PRACH transmission, then resource utilization efficiency is improved through flexible adjustment, but system complexity increases due to additional signaling mechanisms
Solution Approach 1:
The patent makes the existing control region signaling mechanism universal by enabling it to serve multiple functions: it can indicate both the presence and the size of the control region, and can adapt to different PRACH scenarios (collision and non-collision). This multi-functionality approach improves resource efficiency without requiring entirely separate signaling systems for each scenario, thereby limiting the increase in system complexity.
Solution Approach 2:
The patent enables the system to self-adjust the control region configuration through autonomous signaling between the network device and UE. The network device independently determines the appropriate control region size based on system conditions and signals this information to the UE, which then configures its PRACH transmission accordingly. This self-service mechanism achieves dynamic optimization without requiring complex external control or coordination protocols.
3Reliability
If the number of control symbols is increased to handle collision scenarios, then PRACH transmission reliability is improved, but time resource consumption increases due to extended transmission duration
Solution Approach 1:
The patent applies dynamic adjustment of control symbol allocation specifically for collision scenarios. Instead of always allocating the maximum number of control symbols, the system dynamically determines the appropriate control region size based on whether a collision scenario is detected. This allows the system to maintain reliability when needed (during collisions) while minimizing time resource consumption during normal operations without collisions.
Data Source
AI summary
Techniques for signaling dynamic region for PRACH transmission are described. In an aspect, the disclosure describes a method for receiving, at a user equipment (UE), an indication of a number of symbols that the UE is to use when transmitting via a physical random access channel (PRACH), and transmitting, by the UE, via the PRACH over one or more slots based on the number of symbols. In another aspect, the disclosure describes a method for generating, at a network device, an indication of a number of symbols that a UE is to use when transmitting PRACH, transmitting, by the network device, the indication to the UE. A UE and network device configuration as well as apparatuses and computer-readable medium related to these methods are also described.