IRS Flexible Slot Allocation for Efficient Channel Design
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Solution Overview
Problem
The high power consumption and inefficient channel design in MIMO systems due to large data amounts in downlink channel information and long measurement and feedback periodicity in IRS-MIMO systems.
Innovation Solution
A resource allocation method using flexible slots to determine IRS array control parameters, allowing uplink and downlink data transmission without interference, and leveraging channel reciprocity to optimize channel design efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the terminal device measures downlink channel information and feeds it back to the base station for IRS array control parameter determination, then the channel design can be optimized, but the measurement and feedback periodicity becomes long and channel design efficiency becomes low
Solution Approach 1:
The patent inverts the traditional channel measurement approach by using uplink channel information instead of downlink channel information to determine the IRS array control parameters. The base station sends reference signals through the IRS array, the terminal device measures the uplink channel information, and feeds it back to determine the control parameters. This inversion eliminates the need for large amounts of downlink channel information measurement and processing, significantly improving channel design efficiency while maintaining optimization precision.
2Productivity
If a flexible slot is used to determine IRS array control parameters, then uplink and downlink data transmission is not affected, but the slot resource allocation becomes more complex
Solution Approach 1:
The patent segments the time domain resources by introducing flexible slots that can be dynamically configured between uplink and downlink transmission modes. These flexible slots are interspersed with regular uplink and downlink slots, allowing the IRS array control parameter determination to occur without interrupting normal data transmission. The segmentation enables parallel processing of control parameter determination and data transmission, maintaining overall system efficiency while managing allocation complexity through structured time division.
3Reliability
If the base station processes large amounts of signal data from active antenna arrays, then transmission performance is improved, but power consumption on the base station side becomes high
Solution Approach 1:
The patent introduces the IRS array as an intermediary device between the base station and the terminal. The IRS array passively reflects and redirects radio waves to enhance signal coverage and transmission performance without requiring active signal processing. This intermediary approach allows the base station to maintain improved transmission performance while significantly reducing its own power consumption, as the IRS array handles the signal processing function passively.
Data Source
AI summary
Embodiments of this application provide resource allocation method and related apparatus, and generally relate to the communication field. An intelligent reflecting surface (IRS) array control parameter can be determined by using a flexible slot resource, and transmission of uplink data and downlink data are not affected. In the method, a terminal device obtains resource indication information, where the resource indication information indicates an uplink (UL) transmission resource and a downlink (DL) transmission resource in a flexible slot, and the flexible slot is used to determine an IRS array control parameter. The terminal device performs UL transmission and DL transmission based on the resource indication information.