PRACH Preamble Mapping for Common Beam Selection in RACH
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing demand for mobile broadband access in wireless communication networks leads to interference and congestion due to signaling overhead, which diminishes user experience and communication efficiency, particularly in managing communications with multiple user equipment (UEs).
Innovation Solution
A network entity transmits random access channel (RACH) configuration messages indicating PRACH preambles associated with synchronization signal blocks (SSBs), allowing UEs to select preambles linked to multiple SSBs based on quality measurements, and transmits these preambles on respective beams, indicating suitable beams for communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the network manages communications with multiple UEs using traditional signaling methods, then communication coverage and connectivity are improved, but signaling overhead increases causing network congestion and reduced efficiency
Solution Approach 1:
The patent combines multiple SSBs (synchronization signal blocks) into a single beam, allowing the network to transmit multiple signals simultaneously in the same spatial direction. This merging approach reduces the number of separate signaling transmissions required, thereby reducing signaling overhead while maintaining communication coverage across multiple UEs in different locations.
Solution Approach 2:
The unified beam serves multiple functions by simultaneously supporting communications with multiple UEs that were previously served by separate beams. The single beam acts as a universal transmission medium that can accommodate multiple UEs based on their quality measurements and beam associations, reducing the overall signaling complexity while maintaining versatile communication coverage.
2Reliability
If the network transmits signals on multiple separate beams for different UEs, then each UE receives optimal signal quality, but energy consumption and transmission resources increase
Solution Approach 1:
The patent merges multiple beam transmissions into a single unified beam that can serve multiple UEs simultaneously. By combining the transmission functions previously distributed across separate beams, the network reduces the total energy consumption while maintaining reliable signal quality for all associated UEs through coordinated beamforming and signal processing.
Solution Approach 2:
Instead of transmitting separate optimized signals for each UE on dedicated beams, the system uses a single beam that provides sufficient signal quality for multiple UEs. This partial action approach allows the network to achieve acceptable signal quality for multiple users without the full energy cost of dedicated per-UE beam transmissions, thereby reducing overall energy consumption.
3Manufacturing precision
If the network uses separate beams for each UE, then beam-specific signal optimization is achieved, but the number of transmissions and network resources required increases
Solution Approach 1:
The patent combines multiple beam transmissions into a single unified beam that serves multiple UEs simultaneously. This merging approach maintains beam optimization capabilities through coordinated signal processing while significantly improving transmission efficiency by reducing the total number of separate transmissions required. The unified beam structure allows multiple UEs to be served with a single transmission event.
Solution Approach 2:
The unified beam acts as a universal transmission medium that can optimize signals for multiple UEs simultaneously. By designing the beam to be multi-functional and capable of serving multiple users based on their quality measurements and associations, the system achieves efficient transmissions without requiring separate dedicated beams for each user, thereby improving overall transmission productivity.
Data Source
AI summary
This disclosure provides systems, methods, and apparatuses, including computer programs encoded on computer storage media, for wireless communication. In one aspect of the disclosure, a network entity transmits random access channel (RACH) configuration messages indicating physical RACH (PRACH) preambles associated with synchronization signal blocks (SSBs) in which at least one of the PRACH preambles is associated with two or more SSBs. User equipments (UEs) determine one or more suitable beams according to signal quality measurements of SSBs received on respective beams and select a PRACH preamble according to the SSBs having suitable signal quality measurements. The UEs transmit the selected preamble to the network entity, which may then select a common beam for downlink communication to the UEs according to common beams associated with the received preambles. Other aspects and features are also claimed and described.