Dynamic Uplink Control Multiplexing for Wireless Reliability
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Solution Overview
Problem
Wireless communication systems face challenges in efficiently managing dynamic uplink control multiplexing between physical uplink channels, particularly in scenarios where transmissions on the physical uplink shared channel (PUSCH) and physical uplink control channel (PUCCH) overlap in time, leading to interference and reduced communication reliability.
Innovation Solution
The implementation of a method where user equipment (UE) selects a multiplexing configuration based on received scheduling information to either multiplex uplink control information (UCI) on the PUSCH or PUCCH, or to transmit it separately, allowing for flexible scheduling to avoid interference and enhance reliability, using radio resource control (RRC) configurations and downlink control information (DCI) messages to determine the appropriate channel for UCI transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UCI is transmitted on PUCCH separately from PUSCH, then control information reliability is improved, but device complexity and scheduling flexibility worsen due to separate transmission coordination
Solution Approach 1:
The patent merges UCI and data transmission by allowing UCI to be multiplexed on PUSCH, eliminating the need for separate PUCCH transmission coordination. This combining approach maintains reliability through flexible multiplexing while reducing scheduling complexity by unifying the transmission channel.
Solution Approach 2:
The patent introduces dynamic multiplexing configuration where the UE can be configured via RRC signaling to dynamically select between multiplexing UCI on PUSCH or transmitting separately on PUCCH based on scheduling conditions. This dynamic adaptation resolves the contradiction by allowing the system to switch between modes depending on traffic and reliability requirements.
2Adaptability or versatility
If UCI is multiplexed on PUSCH, then scheduling flexibility and resource utilization are improved, but control information reliability worsens due to potential interference with data transmission
Solution Approach 1:
The patent employs dynamic configuration through RRC signaling that allows the network to adaptively control whether UCI is multiplexed on PUSCH or transmitted separately on PUCCH. This dynamic switching enables the system to optimize between flexibility and reliability based on current channel conditions and traffic requirements.
Solution Approach 2:
The patent changes the transmission parameter (multiplexing configuration) based on scheduling information and channel conditions. By adjusting the multiplexing state between 'multiplexed on PUSCH' and 'separate PUCCH transmission', the system can adapt to varying reliability and flexibility requirements without fixed constraints.
3Reliability
If simultaneous transmission of PUSCH and PUCCH is supported, then communication reliability is improved, but loss of time increases due to additional coordination overhead and potential conflicts
Solution Approach 1:
The patent merges PUSCH and PUCCH transmissions by multiplexing UCI on PUSCH when configured, eliminating the need for separate simultaneous PUCCH transmission and its associated coordination overhead. This combining approach maintains reliability through flexible multiplexing while reducing time loss by avoiding duplicate coordination procedures.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In some wireless communications systems, a user equipment (UE) may support simultaneous transmissions of data on an uplink shared channel that is associated with a first cell, and control information such as uplink control information on an uplink control channel associated with a second cell. The UE may receive scheduling information that indicates a time domain overlap of scheduled transmissions associated with the uplink control channel and the uplink shared channel, and a multiplexing configuration for the UE which indicates whether the UE is to multiplex the uplink control information on the uplink control channel or whether the UE is to multiplex the uplink control information on the uplink shared channel.