Flexible UCI Positioning on PUSCH for 5G NR Scheduling
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Solution Overview
Problem
Existing wireless communication systems face limitations in scheduling flexibility for physical uplink shared channel (PUSCH) transmissions due to restrictive front-loaded uplink control information (UCI) transmission approaches, which can lead to difficulties in guaranteeing processing timelines and beam management for diverse services in 5G new radio (NR) networks.
Innovation Solution
The implementation of flexible UCI transmission on PUSCH with UL-SCH multiplexing, allowing UCI to be transmitted in various parts of the uplink transmission, including the first DFT-s-OFDM symbol, puncturing of UL-SCH, or transmission after the first DM-RS symbol, to accommodate different UE capabilities and CBB boundaries, thereby enhancing scheduling flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If front-loaded UCI transmission is used on PUSCH, then processing timeline can be guaranteed, but scheduling flexibility is reduced
Solution Approach 1:
The patent implements dynamic UCI transmission positioning where the UCI can be transmitted in different locations within the PUSCH based on scheduling conditions, UE capabilities, and service requirements. This dynamic approach allows the system to adapt between front-loaded positioning (for reliability) and flexible positioning (for scheduling freedom), resolving the contradiction between guaranteed processing timelines and scheduling flexibility.
Solution Approach 2:
The patent changes the parameter of UCI transmission position from a fixed front-loaded location to a variable position that can be adjusted based on different conditions. By allowing UCI to be transmitted at different positions (first symbol, middle, or end of PUSCH) based on scheduling flexibility indicators and UE capabilities, the system achieves both processing timeline guarantees and scheduling adaptability.
2Reliability
If UCI is transmitted in the first DFT-s-OFDM symbol, then processing timeline is guaranteed, but beam management flexibility is reduced
Solution Approach 1:
The patent enables dynamic selection of UCI transmission position relative to DM-RS symbols, allowing the system to switch between first-symbol transmission (for processing timeline guarantee) and later-position transmission (for beam management flexibility). This dynamic positioning resolves the contradiction between reliable processing timelines and flexible beam management for diverse services.
3Adaptability or versatility
If flexible UCI transmission positioning is implemented, then scheduling flexibility is improved, but processing timeline guarantee becomes difficult
Solution Approach 1:
The patent introduces a scheduling flexibility indicator as a controllable parameter that, when set by the network, enables flexible UCI positioning. Combined with UE capability indications and processing timeline checks, this parameter allows the system to achieve scheduling flexibility while maintaining processing timeline guarantees through coordinated parameter management.
4Adaptability or versatility
If UCI transmission is adapted to UE capabilities and CBB boundaries, then service diversity support is improved, but system complexity increases
Solution Approach 1:
The patent creates a universal UCI transmission framework that handles multiple service types, UE capabilities, and CBB configurations through a unified set of rules and indicators. This multi-functional approach allows diverse services to be supported without requiring separate mechanisms for each case, thereby limiting the increase in system complexity while maintaining high adaptability.
Data Source
AI summary
This invention relates an apparatus comprising processing circuitry configured to: determine, based on UE capability information, a position of uplink control information (UCI) within a physical uplink shared channel (PUSCH) transmission; and encode a PUSCH message for transmission that includes the UCI at the determined position.