Random-Access Reference Signal Selection for Simultaneous Uplink and Downlink
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems lack efficient mechanisms for enabling simultaneous downlink reception and uplink transmission during initial access procedures, particularly in advanced networks like 5G and beyond, which can hinder performance and efficiency.
Innovation Solution
A method and apparatus for providing and receiving information about specific reference signals during a random access procedure to facilitate simultaneous downlink and uplink transmissions, including selecting suitable reference signals based on signal conditions and network support indications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional random access procedures are used, then the initial access process is simple, but simultaneous downlink reception and uplink transmission cannot be performed
Solution Approach 1:
The patent segments the random access procedure into distinct phases: selecting a first reference signal for uplink transmission, selecting a second reference signal for downlink reception, and providing indication information to the network node. This segmentation enables simultaneous downlink and uplink operations while maintaining manageable procedural complexity through structured information exchange.
Solution Approach 2:
The patent applies preliminary action by having the user equipment select and indicate the second reference signal for downlink reception before actual data transmission begins. The network node receives this indication in advance and configures相应的 downlink resources, enabling simultaneous reception and transmission without waiting for separate configuration messages.
2Productivity
If reference signal information is provided during random access, then simultaneous transmission and reception is enabled, but signaling overhead increases
Solution Approach 1:
The patent makes the indication information multi-functional by encoding both the first reference signal (for uplink) and second reference signal (for downlink) selections within a single signaling message during random access. This universal approach enables simultaneous transmission and reception configuration while minimizing signaling overhead through consolidated information exchange.
Solution Approach 2:
The patent changes the parameter representation by using reference signal indices and resource indicators instead of full reference signal configurations. This parameter transformation reduces the amount of signaling data required while maintaining the ability to precisely identify and configure the reference signals for simultaneous uplink and downlink operations.
Data Source
AI summary
There is provided means for receiving a plurality of reference signals from a network node, means for determining a first reference signal from the plurality of reference signals based on a first signal condition, means for determining a second reference signal from the plurality of reference signals based on a second signal condition, wherein the second signal condition is dependent on the first signal condition and means for providing, from the apparatus to the network node during a random access procedure, information relating to the first reference signal and information relating to the second reference signal for performing at least one of simultaneous downlink reception or simultaneous uplink transmission at the user equipment.