Multi-TRP SSB Burst Set Monitoring via RRC Configuration

Solution Overview

Problem

In wireless communication networks, especially in multiple transmission reception point (TRP) modes, user equipment (UE) struggles to determine and monitor Synchronization Signal Block (SSB) burst sets for secondary base stations with different physical cell identities, leading to inadequate control information retrieval and high latency, which hinders reliable operation and low latency requirements in URLLC modes.

Innovation Solution

The implementation of enhanced SSB burst set determination and monitoring procedures, along with improved beam reporting and monitoring, allows UEs to detect and monitor SSB burst sets from multiple TRPs with different physical cell identities, using RRC configuration messages to indicate SSB indices and beam grouping for efficient communication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If UE monitors SSB burst sets from multiple TRPs with different PCIs, then reliability and throughput are improved, but device complexity and processing burden increase

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidUE processing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the SSB monitoring process by introducing separate configuration mechanisms for first SSB burst sets (from serving cell) and second SSB burst sets (from neighboring cells/TRPs). The network configures separate parameter sets including ssb-PositionInBurst, ssb-periodicityServingCell, and ssb-periodicityNeighbourCell, allowing the UE to handle multiple TRPs through structured division of monitoring tasks rather than monolithic processing.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The network performs preliminary configuration actions by providing RRC configuration messages that pre-define SSB burst set parameters for multiple TRPs before actual monitoring begins. The UE receives and stores configuration information including SSB indices, periodicities, and position parameters in advance, enabling efficient multi-TRP monitoring without real-time computation overhead.

Inventive Principle:

Principle #10Preliminary action

2Loss of information

If UE determines SSB burst set information for multiple PCIs, then control information retrieval is improved, but latency increases

Engineering Contradiction:

Improvecontrol information retrievalVSAvoiddetermination latency

Core Design Contradiction:

Loss of informationVSLoss of time

Solution Approach 1:

The network performs preliminary configuration actions by providing RRC configuration messages that pre-define SSB burst set parameters for multiple TRPs before actual monitoring begins. The UE receives and stores configuration information including SSB indices, periodicities, and position parameters in advance, enabling efficient multi-TRP monitoring without real-time computation overhead.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces network-configured parameter sets as intermediaries between the UE and multiple TRPs. Instead of the UE directly discovering and determining SSB parameters from multiple TRPs autonomously (which would be time-consuming), the network acts as an intermediary by providing pre-configured parameter sets that encode SSB burst set information for multiple PCIs, significantly reducing determination latency.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If UE monitors SSB from multiple TRPs, then network efficiency increases, but energy consumption increases

Engineering Contradiction:

Improvenetwork efficiencyVSAvoidUE energy consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The patent segments the SSB monitoring process by introducing separate configuration mechanisms for first SSB burst sets (from serving cell) and second SSB burst sets (from neighboring cells/TRPs). The network configures separate parameter sets including ssb-PositionInBurst, ssb-periodicityServingCell, and ssb-periodicityNeighbourCell, allowing the UE to handle multiple TRPs through structured division of monitoring tasks rather than monolithic processing.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12068980B2Enhancements for multi-TRP modes

Publication Date: 2024.08.20 QUALCOMM INC

AI summary

In one aspect, a method includes determining a first SSB burst set information corresponding to a first PCI; determining a second SSB burst set information corresponding to a second PCI, the second PCI different from the first PCI; and monitoring at least a first SSB from the first SSB burst set and at least a second SSB from the second SSB burst set. In another aspect, a method includes determining a number of RSRP reports to send based a CSI report request; transmitting a first RSRP report for a first beam of a plurality of beams, the first beam associated with a first group of beams of a plurality of groups; and transmitting a second RSRP report for a second beam of the plurality of beams, the second beam associated with a second group of beams of the plurality of groups.