Interference Control Signaling Overhead Reduction in Wireless Systems
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Solution Overview
Problem
The existing wireless communication systems face increased system overhead due to the transmission of cost values for all sub-bands in the reuse set through interference control signaling, which affects efficiency and resource allocation.
Innovation Solution
A method is introduced where the base station selects and transmits Sub-band Price Indication (SPI) values for a part of the sub-bands with a frequency reuse factor greater than 1, allowing terminals to decode and recover SPI values for the remaining sub-bands, reducing the need to transmit all SPI values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the base station transmits the cost of all the sub-bands in the reuse set to the terminals through interference control signaling, then the terminals can obtain complete cost information for resource allocation, but the system overhead will be increased
Solution Approach 1:
The patent extracts only the necessary cost information (SPI values) from the complete set of sub-band costs and transmits only this essential subset to terminals. The base station identifies and transmits SPI values for specific sub-bands that require interference control, rather than transmitting all sub-band cost values, thereby reducing system overhead while maintaining effective resource allocation capability
Solution Approach 2:
The patent segments the complete set of sub-band cost information into multiple groups based on frequency reuse factors. Different SPI values are transmitted for different sub-band groups (Reuse=1, Reuse=3/2, Reuse=3), allowing selective transmission of cost information based on interference characteristics and reducing overall signaling overhead
2Measurement precision
If the base station transmits the cost of all the sub-bands in the reuse set to the terminals, then the terminals can accurately determine CQI values for feedback, but the resource allocation efficiency will be reduced due to increased overhead
Solution Approach 1:
The patent extracts and transmits only the critical SPI values needed for terminal calculations rather than all cost data. Terminals use the received SPI values combined with their channel estimation results to calculate CQI values, maintaining accuracy while reducing the volume of transmitted information and improving resource allocation efficiency
Solution Approach 2:
The patent enables terminals to self-calculate CQI values using the transmitted SPI values and their own channel estimation capabilities. This self-service approach allows terminals to derive accurate cost information (nSEi=SEi/Costi) without requiring the base station to transmit complete cost data, thereby improving resource allocation efficiency while maintaining measurement precision
Data Source
AI summary
A method for transmitting and receiving interference control signaling in the wireless communication system is provided by the present invention, wherein the transmitting method includes: a base station firstly selecting SPI values of a part of sub-bands in a sub-band set in which the frequency reuse factor is Reuse=n>1 according to SPI value selecting regulation of sub-bands, then forming interference control signaling, and finally transmitting the interference control signaling to all the terminals under the base station through a downlink channel. The SPI values of a part of sub-bands may be either SPI values of kn−1 sub-bands in a sub-band set in which the frequency reuse factor is Reuse=n>1, or SPI values of sub-bands corresponding to Ln−1 transmission power levels in a sub-band set in which frequency reuse factor is Reuse=n>1. Through the present invention, the system overhead can be effectively saved.