Interference Measurement Resource Configuration for Cross-Interference
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Solution Overview
Problem
Current interference measurement methods in LTE-A systems are inadequate for measuring cross-interference, particularly inter-UE and inter-TRP interference, as they primarily focus on codirectional interference, failing to accurately assess cross-interference that occurs between uplink and downlink transmissions.
Innovation Solution
A signal transmission method and device that improve resource configuration flexibility by allowing terminal devices to receive information on reference signal resources and transmission directions, enabling accurate interference measurement by matching the pattern of interference measurement resources between transmit-end and receive-end devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If flexible duplex technology is introduced to separately configure uplink and downlink transmission, then resource utilization is improved, but cross-interference between uplink and downlink increases
Solution Approach 1:
The base station performs preliminary actions by configuring CSI-IM resources and transmitting indication information before the actual interference measurement. The terminal device receives this configuration and performs interference measurement in advance to assess cross-interference levels, enabling the base station to make informed scheduling decisions that prevent harmful cross-interference while maintaining flexible duplex resource utilization.
2Measurement precision
If interference measurement methods are used to measure codirectional interference, then measurement precision for traditional interference is improved, but applicability to cross-interference measurement deteriorates
Solution Approach 1:
The patent extends the interference measurement mechanism to achieve universality by enabling the same CSI-IM resource configuration and measurement procedure to serve both traditional codirectional interference measurement and new cross-interference measurement. The base station configures CSI-IM resources that can be used for measuring interference from both downlink to downlink and uplink to downlink transmissions, making the measurement system adaptable to multiple interference scenarios without requiring separate specialized mechanisms.
3Reliability
If base stations coordinate scheduling to avoid high cross-interference, then data transmission reliability is improved, but device complexity increases
Solution Approach 1:
The terminal device performs self-service by autonomously measuring cross-interference levels using configured CSI-IM resources and reporting these measurements to the base station. This self-measurement capability eliminates the need for complex centralized coordination between base stations, as each terminal independently assesses its own interference exposure and provides this information to the base station for scheduling decisions, significantly reducing coordination complexity while maintaining transmission reliability.
Data Source
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Figure 4b~6a
AI summary
This application relates to the field of communications technologies and discloses a signal transmission method and device, and a system. The method includes: determining, by a first device after receiving first information transmitted by a second device, to perform at least one of interference measurement and channel measurement on a resource, or to transmit a reference signal on a resource. The second device can configure the resource of the reference signal for the first device by transmitting the first information to the first device that is in a transmitting state or a receiving state, thereby improving flexibility of resource configuration of the reference signal. When this technical solution is applied to cross interference measurement, accuracy of inter-UE interference measurement is improved.