Uplink Control Information Symbol and Beam Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In millimeter wave (mmW) wireless communication systems, existing technologies face challenges in accurately receiving uplink control information due to the need for UE-specific beamforming, which can lead to missed scheduling requests from UEs in different angular regions, and inefficient use of symbols for transmitting control information based on fixed channel configurations.
Innovation Solution
An apparatus and method that determine the quantity of symbols for communicating uplink control information based on the link gain or payload size of a user equipment (UE), and adjust the number of beams for channel information transmission based on whether the uplink control information is sent via a physical uplink control channel (PUCCH) or physical uplink shared channel (PUSCH), allowing for dynamic allocation of symbols and beams to improve communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If UE-specific UL RX beamforming is performed to receive SRS, then channel estimation accuracy is improved, but scheduling requests from UEs in different angular regions are missed
Solution Approach 1:
The patent segments the uplink control information reception into two distinct time intervals: one for receiving SRS with UE-specific beamforming to achieve accurate channel estimation, and another for receiving scheduling requests with non-UE-specific beamforming to ensure coverage of all angular regions. This temporal segmentation allows both requirements to be satisfied without interference.
Solution Approach 2:
The patent dynamically adjusts the beamforming configuration based on the type of uplink control information being received. The base station switches between UE-specific beamforming (for SRS) and non-UE-specific beamforming (for scheduling requests), making the beamforming approach adaptive to the specific reception requirement rather than fixed.
2Device complexity
If fixed channel configurations are used for control information transmission, then system simplicity is maintained, but communication efficiency is reduced
Solution Approach 1:
The patent introduces dynamic allocation of time intervals for different types of uplink control information based on traffic conditions and channel state. The base station can flexibly adjust the timing and duration of SRS reception versus scheduling request reception, optimizing resource utilization for varying communication demands while maintaining a relatively simple overall system structure.
Solution Approach 2:
The patent changes the temporal parameters of control information reception by introducing configurable time intervals between SRS reception and scheduling request reception. These parameter adjustments allow the system to optimize for different traffic scenarios without fundamentally changing the system architecture, balancing simplicity with efficiency.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Various aspects of the disclosure relate to communicating uplink control information. As one example, a user equipment may send uplink control information to a base station. In some aspects, the number of symbols used to communicate the uplink control information may be based on a link gain associated with the UE and/or based on a payload size of the uplink control information. As another example, the user equipment may send channel information for a number of beams to the base station. In some aspects, the number of beams may be based on the type of channel that is used to send the uplink control information.