PUSCH Control Multiplexing with RS-Adaptive UCI Placement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in ensuring high reliability and efficient transmission of uplink control information (UCI) on the physical uplink shared channel (PUSCH), particularly in scenarios where the physical uplink control channel (PUCCH) is allocated, leading to sub-optimal peak-to-average power ratio (PAPR) and inadequate protection of critical control information.
Innovation Solution
The solution involves transmitting elements of uplink control information on the PUSCH by introducing a concept of Prioritized Information, which includes critical control signals like ACKNAK, CQI, and Rank Information, positioned adjacent to reference signals (RS) to ensure accurate channel estimates and enhanced protection, thereby maintaining reliable uplink and downlink channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If control information is transmitted using PUSCH, then resource utilization is improved, but transmission reliability deteriorates
Solution Approach 1:
The patent applies local quality by positioning control information elements at specific locations within the PUSCH sub-frame structure that are adjacent to reference signals. This localized positioning ensures that control information receives enhanced channel estimation accuracy and protection, while the rest of the PUSCH resources continue to be used for data transmission, thus resolving the contradiction between resource utilization and transmission reliability.
2Reliability
If control information is transmitted using PUCCH, then transmission reliability is improved, but resource utilization deteriorates
Solution Approach 1:
The patent merges the functions of PUCCH and PUSCH by transmitting control information within the PUSCH structure rather than requiring separate PUCCH resources. By combining control information transmission with data transmission in the same physical channel, the system achieves both high reliability (through proper positioning and protection) and high resource utilization (by eliminating dedicated control channel overhead).
Solution Approach 2:
The PUSCH is designed to serve multiple functions: it transmits both user data and uplink control information. This multi-functionality allows the system to utilize the same time-frequency resources for both data and control transmissions, improving overall resource utilization while maintaining reliability through the specific positioning strategy for control information.
3Quantity of substance
If critical control information is positioned away from reference signals, then data transmission capacity is improved, but channel estimation accuracy deteriorates
Solution Approach 1:
The patent applies local quality by creating different quality zones within the PUSCH structure: control information elements positioned adjacent to reference signals receive high channel estimation accuracy, while other data elements can be positioned elsewhere to maximize capacity. This localized differentiation resolves the contradiction between data capacity and channel estimation accuracy.
Data Source
AI summary
Transmission of information in a wireless network is performed by allocating a channel from a transmitter to a receiver. The channel has at least one time slot with each time slot having a plurality of symbols. Each slot contains at least one reference symbol (RS). As information becomes available for transmission, it is classified as prioritized information (PI) and other information. One or more priority symbols are generated using the digital samples of the priority information. Other symbols are generated using the other data. Priority symbols are transmitted on the channel in a manner that separation of priority symbol(s) and a reference symbol does not exceed a time duration of one symbol. For example, Rank Indicator (RI) is transmitted using symbol k, ACKNAK is transmitted using symbol k+1; and the reference signal (RS) is transmitted using symbol k+2, wherein symbols k, k+1, and k+2 are consecutive in time.