Multi-Slot PUSCH Configuration for Half-Duplex TDD Systems
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Solution Overview
Problem
In Time Division Duplexing (TDD) systems, configuring multi-slot Physical Uplink Shared Channel (PUSCH) is challenging due to the limited number of consecutive uplink slots, which reduces the coverage and effectiveness of multi-slot operations compared to Full-Duplex systems.
Innovation Solution
The method involves configuring the User Equipment (UE) with slot-based information, determining consecutive uplink symbols based on Downlink Control Information (DCI), and transmitting PUSCH repetitions in these symbols, allowing for the realization of multi-slot gains in a half-duplex system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-slot PUSCH configuration is implemented in TDD systems, then coverage and reliability are improved, but the limited number of consecutive uplink slots reduces the effectiveness compared to Full-Duplex systems
Solution Approach 1:
The patent extends multi-slot PUSCH operations from the time domain to the frequency domain by enabling operations across multiple uplink carriers. This dimensional transition allows the system to achieve multi-slot gains equivalent to Full-Duplex systems by utilizing frequency diversity instead of being constrained by limited consecutive uplink slots in the time domain.
Solution Approach 2:
The invention makes the multi-slot PUSCH configuration universally applicable in TDD systems by introducing carrier indication fields and cross-carrier scheduling mechanisms. This allows the same multi-slot operation mode to be used across different carriers with different slot configurations, making the system adaptable to various TDD uplink-downlink patterns.
2Adaptability or versatility
If consecutive uplink slots are limited in TDD systems, then resource allocation flexibility is improved, but multi-slot PUSCH coverage and effectiveness are reduced
Solution Approach 1:
By introducing cross-carrier scheduling and carrier indication fields, the patent enables multi-slot operations to span across multiple frequency carriers. This transforms the limitation in the time domain into an opportunity in the frequency domain, where resources can be allocated flexibly across carriers while maintaining multi-slot coverage effectiveness.
Solution Approach 2:
The patent segments the multi-slot PUSCH transmission across multiple carriers, where each carrier can have independent slot configurations. This segmentation allows the system to maintain resource allocation flexibility on each carrier while achieving overall multi-slot coverage through the combination of multiple carriers.
3Productivity
If multi-slot PUSCH is configured across multiple carriers, then resource utilization and network performance are enhanced, but signaling complexity increases due to carrier indication requirements
Solution Approach 1:
The patent applies preliminary action by pre-configuring carrier sets and their associated parameters through higher-layer signaling before actual PUSCH transmissions. The carrier indication fields in DCI formats reference these pre-configured sets, reducing the need for repeated detailed signaling and thereby lowering overall signaling complexity while maintaining enhanced resource utilization.
Data Source
AI summary
Systems and methods are disclosed herein for transmission of multi-slot Physical Uplink Shared Channel PUSCH with repetitions in a half-duplex system such as a Time Division Duplexing TDD system. A method performed by a wireless device for transmission of multi-slot PUSCH repetitions in a half-duplex system comprises: receiving, from a network node, information related to slot-based configuration in a plurality of slots or mini-slots in the half-duplex system (400); determining multiple consecutive uplink symbols in the plurality of slots or mini-slots based on the information received from the network node (402); transmitting PUSCH repetitions to the network node in the determined multiple consecutive uplink symbols in the plurality of slots or mini-slots (404). In this manner, the uplink multi-slot operation is facilitated, the uplink transmission gain is increased and the coverage of the TDD system is improved.