Overlapped Interference Measurement Resources for CoMP Efficiency
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Solution Overview
Problem
In cellular mobile communication systems, existing methods face challenges in efficiently measuring and managing interference between multiple transmission points, particularly in CoMP scenarios where TPs share the same Cell ID, leading to inaccurate interference estimation and increased battery consumption due to unnecessary RF and baseband circuit activation for AP detection.
Innovation Solution
The method involves allocating Interference Measurement Resources (IMRs) that can be overlapped with other IMRs for other terminals, allowing terminals to receive and measure interference, and transmit channel status information to base stations, enabling accurate interference assessment and reducing unnecessary resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If interference measurement resources (IMR) are allocated to terminals in CoMP scenarios with multiple transmission points, then interference measurement capability is improved, but resource overhead and system complexity increase
Solution Approach 1:
The patent combines IMR allocation for multiple terminals into a unified resource pattern framework. By defining a common IMR pattern that can be shared across multiple terminals serving different TPs, the system achieves interference measurement capability without proportionally increasing resource overhead. The base station allocates IMR resources in a coordinated manner across multiple TPs, allowing terminals to measure interference from multiple transmission points using the same resource structure.
Solution Approach 2:
The IMR pattern defined in the patent serves multiple functions simultaneously: it enables interference measurement for multiple terminals, supports CoMP operations across multiple TPs, and provides a universal resource allocation framework that can be applied regardless of the specific number of TPs or terminals in the system. This multi-functional design reduces the need for separate dedicated resources for each terminal-TP pair.
2Reliability
If terminals continuously monitor interference from multiple transmission points, then CoMP performance is improved, but battery consumption increases due to RF and baseband circuit activation
Solution Approach 1:
The patent implements periodic interference measurement through periodically allocated IMR resources rather than continuous monitoring. Terminals activate their RF and baseband circuits only during designated IMR measurement occasions, which occur at regular intervals. This periodic measurement approach maintains CoMP performance by providing timely interference information while significantly reducing battery consumption by keeping circuits dormant between measurement periods.
Solution Approach 2:
The system enables terminals to perform self-service interference measurement using the allocated IMR resources. Terminals autonomously measure interference on the configured IMR resources and report channel state information back to the base station without requiring continuous network coordination or activation. This self-service mechanism reduces signaling overhead and allows terminals to manage their own measurement activities efficiently.
Data Source
AI summary
A method and apparatus for transmitting feedback information is provided for use in a Cooperative Multi-Point downlink transmission of multiple base stations efficiently. An interference measurement method of a base station in a mobile communication system, the method comprising: allocating at least one Interference Measurement Resource (IMR) to a terminal; transmitting the allocated IMR to the terminal; and receiving at least one channel status information from the terminal; wherein allocating at least one IMR comprises allocating at least one IMR for the terminal overlapped to other IMR for the other terminal.


