MAC PDU Generation for UCI Multiplexing During Uplink Skipping
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Solution Overview
Problem
The complexity of blind detection and UCI multiplexing is increased when uplink transmission skipping occurs due to resource collisions between uplink control and data channels, leading to inefficiencies in existing communications protocols.
Innovation Solution
A MAC entity generates a MAC PDU for a HARQ entity based on network-side or physical layer indication, supporting UCI multiplexing on the PUSCH, thereby reducing complexity on the network side and terminal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the terminal skips generating PUSCH when uplink transmission skipping is enabled and no data is available, then uplink transmission overhead is reduced, but the complexity of blind detection on the network side and UCI multiplexing processing increases
Solution Approach 1:
The MAC entity generates a MAC PDU in advance even when no uplink data is available, based on indication information from the physical layer or network side. This preliminary action ensures that the PUSCH channel is always prepared for potential UCI multiplexing, eliminating the need for complex blind detection and simplifying the decision-making process.
Solution Approach 2:
The MAC PDU acts as an intermediary structure that facilitates UCI multiplexing on the PUSCH channel. By introducing this intermediate layer with clear generation rules, the patent mediates between the physical layer's resource allocation and the MAC layer's data transmission, reducing complexity in both blind detection and UCI multiplexing processing.
2Device complexity
If the terminal generates MAC PDU even when no uplink data is available, then UCI multiplexing is simplified and blind detection complexity is reduced, but uplink transmission overhead increases
Solution Approach 1:
The MAC entity generates a MAC PDU in advance even when no uplink data is available, based on indication information from the physical layer or network side. This preliminary action ensures that the PUSCH channel is always prepared for potential UCI multiplexing, eliminating the need for complex blind detection and simplifying the decision-making process.
Solution Approach 2:
The patent changes the parameter of MAC PDU generation from conditional (only when data is available) to unconditional (based on indication information), allowing the system to trade some uplink overhead for significant reductions in detection and processing complexity.
3Reliability
If the terminal chooses to transmit UCI on PUCCH instead of multiplexing on PUSCH, then UCI transmission reliability is improved, but resource collision and processing complexity increase
Solution Approach 1:
The patent merges UCI transmission with PUSCH transmission by enabling UCI multiplexing on the PUSCH channel. The MAC entity generates a MAC PDU that can carry both uplink data (when available) and UCI, combining two separate transmission functions into one unified process, thereby reducing resource collisions and processing complexity while maintaining reliability.
Data Source
AI summary
A protocol data unit generation method, a configuration method, an apparatus, and an electronic device are disclosed. The protocol data unit generation method is applied to a terminal, and the method includes: generating, by a media access control MAC entity of the terminal, a MAC protocol data unit PDU for a currently scheduled hybrid automatic repeat request HARQ entity according to at least one of the following: first indication information sent by a network-side device, second indication information sent by a physical layer entity to the MAC entity, and a configuration of the terminal; and sending, by the MAC entity, the generated MAC PDU to the physical layer entity.