Uplink Channel Power and Phase Control for Repeated Transmission
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Solution Overview
Problem
Existing communication systems face challenges in improving the performance of repeated uplink transmission, particularly in scenarios where power consistency and phase continuity between different physical uplink channels are maintained, leading to inefficiencies in channel estimation and resource utilization.
Innovation Solution
A communication method and apparatus that allows a terminal device to adjust power consistency and phase continuity between physical uplink channels based on network device indications, enabling flexible transmission in different time units, thereby optimizing resource use and reducing channel estimation complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If power consistency and phase continuity are maintained between first physical uplink channel and second physical uplink channel, then channel estimation accuracy is improved, but device complexity increases due to joint processing requirements
Solution Approach 1:
The patent applies dynamics by making the power consistency and phase continuity requirements conditional rather than fixed. The network device dynamically indicates whether these requirements should be maintained through signaling (e.g., DCI or RRC), allowing the terminal device to adapt its transmission strategy based on current channel conditions and network needs, thus resolving the contradiction between maintaining accuracy and reducing complexity
Solution Approach 2:
The patent changes the parameter of power consistency requirement from a fixed constraint to a configurable parameter. By introducing indication information that can specify different power consistency requirements (e.g., same power, different power, power offset), the system can adjust the degree of power consistency based on transmission conditions, thereby balancing channel estimation accuracy with device complexity
2Reliability
If power consistency is maintained between physical uplink channels in different time units, then transmission reliability is improved, but flexibility in power adjustment is reduced
Solution Approach 1:
The patent makes power consistency requirements dynamic through network device indication. The terminal device can switch between maintaining power consistency and adjusting power flexibly based on real-time network conditions, full-duplex slot configurations, and interference levels, thus achieving both reliability and adaptability
Solution Approach 2:
The patent applies local quality by allowing different power consistency requirements for different time units or different physical uplink channels. Instead of enforcing a uniform power consistency rule across all transmissions, the system can specify power consistency requirements locally for specific channel pairs or time units, enabling targeted power adjustment where needed while maintaining consistency where beneficial
3Measurement precision
If joint processing is performed on DMRS for first physical uplink channel and second physical uplink channel, then channel estimation performance is improved, but processing time increases
Solution Approach 1:
The patent makes joint processing dynamic by allowing the network device to indicate whether joint processing should be performed. The terminal device can switch between joint processing and separate processing modes based on network requirements, channel conditions, and timing constraints, thus balancing estimation performance with processing time
Solution Approach 2:
The patent applies partial action by allowing selective joint processing only when beneficial. Instead of always performing joint processing on all DMRS, the system can choose to perform joint processing only for specific channel pairs or under specific conditions, reducing unnecessary processing time while maintaining performance where needed
Data Source
AI summary
A communication method is provided. In an example of the communication method, a terminal device receives first indication information and second indication information that are from a network device. The first indication information indicates the terminal device to separately send first uplink information in a first time unit and a second time unit, the first time unit is used only for uplink transmission, and the second time unit is used for uplink transmission and downlink transmission. The second indication information indicates the terminal device whether to maintain power consistency and phase continuity between a first physical uplink channel and a second physical uplink channel.