PRACH and SR Prioritization in Wireless Slot Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently allocating and utilizing bandwidth, leading to insufficient data transfer speeds and resource inefficiencies due to complexities in initial access procedures and handover operations, particularly in determining system frame numbers during handovers.
Innovation Solution
Implementing prioritization rules in the physical layer to allocate power and slots for PRACH and SR transmissions, allowing simultaneous transmissions within the same slot at higher layers while using different slots at the physical layer, and defining timing constraints to determine PRACH resources without decoding the PBCH, thereby reducing handover delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PRACH and SR transmissions are performed simultaneously in the same slot at physical layer, then transmission efficiency is improved, but device complexity and power consumption increase due to conflicting prioritization rules
Solution Approach 1:
The patent segments the transmission resources by introducing a first slot and a second slot within the same time slot. PRACH transmission is performed in the first slot while SR transmission is performed in the second slot, thereby avoiding simultaneous transmission conflicts and simplifying prioritization rules while maintaining high transmission efficiency.
2Measurement precision
If PRACH resources are determined by decoding PBCH during handover, then accuracy is improved, but handover delay increases due to additional decoding time
Solution Approach 1:
The patent applies preliminary action by pre-determining PRACH resources based on SSB index information before handover execution. The target base station provides SSB index information in the handover command, allowing the terminal to directly determine PRACH resources without needing to decode PBCH during handover, thus reducing handover delay while maintaining accuracy.
3Speed
If bandwidth allocation is optimized for high data transfer speeds, then communication performance is improved, but resource utilization efficiency deteriorates due to insufficient bandwidth release mechanisms
Solution Approach 1:
The patent introduces dynamic bandwidth adjustment mechanisms that allow bandwidth allocation to adapt to actual communication needs. By implementing flexible resource allocation and release based on traffic conditions and handover scenarios, the system maintains high data transfer speeds when needed while efficiently releasing and reallocating bandwidth resources to improve overall utilization efficiency.
Data Source
AI summary
An apparatus is configured for a user equipment (UE) device. The apparatus comprises baseband circuitry and/or application circuitry which includes a radio frequency (RF) interface and one or more processors. The one or more processors are configured to generate a physical random access channel (PRACH) within a slot at a medium access control (MAC) layer, generate a scheduling request (SR) within the slot at the MAC layer, determine a PRACH prioritization and an SR prioritization at a physical layer according to a prioritization rule; and provide the PRACH and the SR to the RF interface for transmission according to the prioritization rule.