RMSI PDSCH Transmission Using MIB Parameters for FR2 Coverage

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Solution Overview

Problem

The coverage bottleneck of the physical downlink control channel (PDCCH) and physical downlink shared channel (PDSCH) in wireless communication systems, particularly in frequency range 2 (FR2), leads to unsuccessful reception and decoding of system information blocks (SIBs), resulting in delayed connection establishment and increased power consumption for user equipment (UEs).

Innovation Solution

Re-purposing PDCCH resource elements for the PDSCH and indicating the coding rate of SIBs via a master information block (MIB), allowing UEs to receive SIBs without decoding a control message, thereby increasing RMSI PDSCH coverage and efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If PDCCH and PDSCH are used for system information transmission in FR2, then connection establishment speed is improved, but coverage is limited due to bottleneck effects

Engineering Contradiction:

Improveconnection establishment speedVSAvoidcoverage

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The patent merges PDCCH resource elements with PDSCH resources to create a unified transmission channel for system information. By combining the control channel resources with data channel resources, the system achieves both fast connection establishment (inherited from PDCCH's rapid scheduling) and extended coverage (inherited from PDSCH's robust data transmission capabilities), resolving the contradiction between speed and reliability in FR2 operations

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent creates a multi-functional transmission mechanism where the same physical resources can serve both control information transmission (PDCCH function) and system information block transmission (PDSCH function). This universal resource usage allows the system to maintain fast connection establishment while achieving extended coverage through flexible resource allocation and modulation schemes

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Loss of information

If UEs decode control messages via PDCCH to receive SIBs, then system information can be transmitted, but power consumption increases and connection establishment is delayed

Engineering Contradiction:

Improvesystem information transmissionVSAvoidpower consumption

Core Design Contradiction:

Loss of informationVSUse of energy by moving object

Solution Approach 1:

The patent extracts the control message decoding step from the traditional reception process. By embedding system information directly in PDSCH resources without requiring separate PDCCH control message decoding, the system eliminates the power-intensive blind decoding operation at the UE, reducing power consumption while maintaining complete system information transmission

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent performs preliminary encoding and packaging of system information blocks before transmission, organizing all necessary information in advance within the PDSCH structure. This preliminary preparation eliminates the need for UEs to perform iterative decoding and interpretation of control messages, reducing both power consumption and connection establishment time

Inventive Principle:

Principle #10Preliminary action

3Loss of information

If traditional PDCCH-based control messaging is used, then scheduling information can be conveyed, but signaling overhead increases

Engineering Contradiction:

Improvescheduling information conveyanceVSAvoidsignaling overhead

Core Design Contradiction:

Loss of informationVSLoss of substance

Solution Approach 1:

The patent merges scheduling information with system information blocks, combining what were previously separate communication streams into a single transmission. By embedding scheduling parameters directly within the SIB payload rather than conveying them through separate PDCCH control messages, the system reduces signaling overhead while maintaining complete scheduling information conveyance

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20260025738A1Communication of system information via a physical downlink shared channel in accordance with information provided by a master information block

Publication Date: 2026.01.22 QUALCOMM INC

AI summary

Methods, systems, and devices for wireless communication are described. Various aspects generally relate to increasing remaining minimum system information (RMSI) physical downlink shared channel (PDSCH) coverage by using one or more physical downlink control channel (PDCCH) resource elements (REs) for the RMSI PDSCH and removing an expectation of a user equipment (UE) to decode an RMSI PDCCH. Some aspects more specifically relate to mechanisms according to which a UE receives information indicative of one or more parameters or resources of an RMSI PDSCH via a mast information block (MIB) or determines one or more parameters or resources of the RMSI PDSCH in accordance with a rule. In some examples, a network entity may transmit an indication of a coding rate of the RMSI PDSCH via the MIB. The UE may decode the RMSI PDSCH for a first system information block (SIB1) in accordance with the indicated coding rate.