5G Reference Signal Reception Priority and Beam Sweeping
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Solution Overview
Problem
In future 5G wireless communication systems, there is a challenge in efficiently transmitting and receiving reference signals (RS) when channel state information-reference signals (CSI-RS) and synchronization signal/physical broadcast channel (SS/PBCH) blocks are multiplexed, particularly in ensuring proper reception priority and beam sweeping operations.
Innovation Solution
A method and apparatus where a user equipment (UE) receives information on the repetition mode for CSI-RS and SS/PBCH blocks, with higher reception priority assigned to the SS/PBCH block, and performs beam sweeping operations accordingly, allowing for multiplexing in frequency division multiplexing (FDM) and determining reception priorities based on received signals from the base station (BS).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If CSI-RS and SS/PBCH block are multiplexed with different configurations, then the system can support diverse communication scenarios (eMBB, URLLC, mMTC), but it becomes difficult to determine reception priority and perform beam sweeping operations
Solution Approach 1:
The patent applies parameter changes by introducing a reception priority parameter that can be dynamically configured through higher-layer signaling. This parameter determines whether SS/PBCH block or CSI-RS has higher priority, allowing the system to adapt to different communication scenarios (eMBB, URLLC, mMTC) while providing a clear mechanism for resolving reception priority conflicts. The base station can adjust this parameter based on traffic requirements and channel conditions.
2Reliability
If SS/PBCH block is always given higher reception priority, then initial access and synchronization are ensured, but CSI-RS reception and channel state measurement may be degraded
Solution Approach 1:
The patent implements dynamics by making the reception priority relationship configurable rather than fixed. Through higher-layer signaling, the system can dynamically switch between two modes: one where SS/PBCH block has higher priority (ensuring reliable initial access and synchronization) and another where CSI-RS has higher priority (enabling accurate channel state measurement). This dynamic configuration allows the system to optimize performance based on current operational requirements.
3Area of stationary object
If beam repetition is used for CSI-RS transmission, then coverage is extended, but interference with SS/PBCH block reception increases
Solution Approach 1:
The patent applies preliminary action by establishing a reception priority configuration through higher-layer signaling before the actual transmission and reception occur. This pre-configuration allows the user equipment to know in advance which signal to prioritize, enabling it to properly handle beam repetition for CSI-RS while protecting SS/PBCH block reception from interference. The base station can configure the priority relationship based on expected traffic patterns and channel conditions.
Data Source
AI summary
Disclosed is a method for a terminal to receive a reference signal in a wireless communication system. In particular, the method comprises: receiving information informing of a mode associated with a repetitive use of a beam for a channel state information-reference signal (CSI-RS); and receiving a synchronization signal/physical broadcast channel (SS/PBCH) block and the CSI-RS multiplexed on the basis of the mode, wherein the reception priority for the SS/PBCH block is higher than the reception priority for the CSI-RS.