Dynamic UCI Resource Element Adjustment for 5G Reliability
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Solution Overview
Problem
In 5G wireless communication systems, the existing LTE technologies fail to ensure consistent transmission reliability of uplink control information (UCI) when multiplexed with uplink data across diverse application scenarios, leading to inefficient use of radio resources and variability in transmission quality due to differences in channel qualities between initial and retransmission beamforming vectors.
Innovation Solution
A method in a User Equipment (UE) that dynamically adjusts the number of Resource Elements (REs) occupied by UCI in the time-frequency domain through signaling, allowing for flexible control of transmission reliability by adjusting the ratio of REs based on reference values, ensuring stability and high reliability even when channel conditions change between initial and retransmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of REs occupied by UCI is determined based on MCS of the first transmission, then transmission reliability of UCI is ensured in traditional LTE systems, but transmission reliability varies across different application scenarios in 5G systems when multiplexed with uplink data
Solution Approach 1:
The patent introduces dynamic adjustment of the number of REs occupied by UCI based on different application scenarios. The base station determines the number of REs dynamically according to the specific scenario (eMBB, URLLC, or mMTC), allowing the system to adapt to varying reliability requirements rather than using a fixed method based solely on MCS of the first transmission.
Solution Approach 2:
The patent changes the parameter used to determine the number of REs from being solely based on MCS of the first transmission to being based on application scenario type. This parameter change allows the system to adjust UCI resource allocation according to the specific 5G scenario requirements, thereby improving both reliability and adaptability.
2Reliability
If the same beamforming vector is used for first transmission and retransmission, then UCI transmission quality remains consistent, but system flexibility and adaptability to channel changes are reduced
Solution Approach 1:
The patent implements a feedback mechanism where the base station determines whether to use the same or different beamforming vectors for retransmission based on channel conditions. The system monitors channel quality and adjusts beamforming strategies accordingly, allowing it to maintain UCI transmission quality when channels are stable while adapting when channel conditions change.
Solution Approach 2:
The patent makes the beamforming vector selection dynamic rather than fixed. The base station can choose to use the same beamforming vector for retransmission to maintain consistency, or switch to a different vector to adapt to channel changes, providing flexibility while maintaining UCI transmission reliability.
3Reliability
If more REs are allocated to UCI to ensure high transmission reliability, then UCI transmission quality improves, but uplink radio resource efficiency decreases
Solution Approach 1:
The patent changes the approach to determining the number of REs from a fixed MCS-based method to a scenario-based dynamic allocation method. For different application scenarios (eMBB, URLLC, mMTC), the system allocates an appropriate number of REs to UCI, ensuring high reliability when needed while avoiding excessive resource allocation in scenarios where it is not necessary, thus improving overall uplink resource efficiency.
Data Source
AI summary
The present disclosure provides a method and a device in a User Equipment (UE) and a base station for wireless communication. A UE first receives a first signaling and a first downlink signaling, and transmits a first radio signal. Herein, the first signaling comprises scheduling information of the first radio signal, the scheduling information includes at least one of a time domain resource occupied, a frequency domain resource occupied, a MCS, a HARQ process number, a RV or a NDI; the first radio signal comprises M first type sub-signal(s) and a second type sub-signal, the M first type sub-signal(s) carries(carry) M first type bit block(s) respectively. The above method can dynamically adjust the number of REs occupied by uplink control information on an uplink physical layer data channel so as to control the transmission reliability of the uplink control information in a flexible manner.