User Terminal Interference Reduction via Signal Reuse
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Solution Overview
Problem
In scenarios where communication areas of multiple radio communication systems overlap, user terminals of one system face significant interference from neighboring systems, leading to increased implementation loads when attempting to detect and request interference reduction processing from other systems' base stations.
Innovation Solution
A method where user terminals and radio base stations utilize existing signal formats, such as synchronization establishment signals and random access signals, to define interference control signals, allowing for interference reduction without significantly increasing the load on the user terminal, by distinguishing between signals from different systems through unique transmission frequencies or sequences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the user terminal implements functions to detect broadcast signals and request interference reduction processing, then interference received from neighboring base stations is reduced, but the implementing load of the user terminal increases
Solution Approach 1:
The patent applies universality by enabling the user terminal to utilize existing signal formats (synchronization establishment signals and random access signals) for dual purposes: traditional system functions and interference control functions. The synchronization establishment signal serves both as a synchronization signal and as an interference broadcast signal, while the random access signal serves both as a connection establishment signal and as an interference reduction request signal. This eliminates the need for separate dedicated interference control signals, thereby reducing the implementing load on the user terminal while maintaining interference reduction capability.
Solution Approach 2:
The patent applies self-service by allowing the user terminal to autonomously determine whether to transmit a random access signal for interference reduction based on its own detection of the synchronization establishment signal. The user terminal independently decides when interference reduction is needed and initiates the process without requiring explicit control instructions from the network side, thereby reducing the complexity of implementing load while achieving effective interference management.
2Reliability
If dedicated interference control signals are introduced, then interference reduction processing can be effectively requested and performed, but the signal format complexity and implementation burden increase
Solution Approach 1:
The patent applies universality by enabling the user terminal to utilize existing signal formats (synchronization establishment signals and random access signals) for dual purposes: traditional system functions and interference control functions. The synchronization establishment signal serves both as a synchronization signal and as an interference broadcast signal, while the random access signal serves both as a connection establishment signal and as an interference reduction request signal. This eliminates the need for separate dedicated interference control signals, thereby reducing the implementing load on the user terminal while maintaining interference reduction capability.
Solution Approach 2:
The patent applies merging by combining the interference control function with existing signal formats. The interference broadcast signal is merged with the synchronization establishment signal, and the interference reduction request signal is merged with the random access signal. This consolidation reduces the number of distinct signal types the user terminal must process, thereby reducing signal format complexity while maintaining reliable interference reduction functionality.
Data Source
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AI summary
A CRS base station (21) includes a transmitting section configured to transmit a synchronization establishment signal, a receiving section configured to receive a random access signal corresponding to the synchronization establishment signal, a determining section configured to determine whether or not the random access signal received by the receiving section has been transmitted from an MCS terminal (12) and an interference reduction processing section configured to perform interference reduction processing on the MCS terminal (12) when the determining section determines that the random access signal has been transmitted from the MCS terminal (12).