Wireless Beam Selection Using CMR and IMR Interference Measurement
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Solution Overview
Problem
Existing wireless communication systems fail to accurately reflect intra-cell interference in channel quality measurements between transmitting and receiving beams, leading to suboptimal beam selection by network-side devices and user equipment.
Innovation Solution
Configuring channel measurement resources (CMRs) and interference measurement resources (IMRs) to enable user equipment to determine signal power, interference power, and signal-to-interference-plus-noise ratio (SINR) for beam selection, allowing network-side devices to make informed choices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If user equipment calculates channel quality based solely on RSRP measurement, then measurement process is simple, but channel quality cannot reflect intra-cell interference
Solution Approach 1:
The measurement resource is segmented into two distinct types: channel measurement resource (CMR) for measuring signal power and interference measurement resource (IMR) for measuring interference power. This segmentation allows the user equipment to separately measure both signal and interference components, enabling accurate channel quality calculation that reflects intra-cell interference while maintaining clear functional differentiation between measurement resources.
Solution Approach 2:
The patent introduces interference measurement resource (IMR) as an intermediary measurement mechanism. The IMR serves as a mediator that independently measures interference power, which is then combined with signal power from CMR to calculate channel quality. This intermediary resource enables the system to account for interference effects without complicating the basic signal measurement process.
2Power
If network-side device uses specific transmitting beam for downlink signal, then beamforming gain is achieved, but interference to other user equipment increases
Solution Approach 1:
The patent implements a feedback mechanism where user equipment measures channel quality (including interference) for different transmitting beams and feeds back this information to the network-side device. The network-side device uses this feedback to select the optimal transmitting beam that maximizes signal power while minimizing interference to other user equipment, thus resolving the contradiction between beamforming gain and interference.
Solution Approach 2:
The patent changes the parameter used for beam selection from simple RSRP to SINR (signal-to-interference-plus-noise ratio) that incorporates interference measurement. By using SINR as the selection criterion, the network-side device can identify transmitting beams that provide high signal power while maintaining acceptable interference levels, effectively balancing beamforming benefits with interference management.
3Measurement precision
If user equipment measures signal power and interference power separately, then channel quality reflects interference accurately, but measurement process becomes complex
Solution Approach 1:
The patent configures CMR and IMR resources in advance before actual channel quality measurement. The network-side device pre-configures the measurement resources, and user equipment performs signal power measurement on CMR and interference power measurement on IMR in a coordinated manner. This preliminary configuration enables efficient simultaneous measurement without significant time overhead.
Data Source
AI summary
An electronic device includes a processing circuit, configured to: configure one or multiple CMR and one or multiple IMR, and use a transmission beam corresponding to the one or multiple CMR to send a downlink signal to a user device, such that the user device: uses a receiving beam to receive the downlink signal from the transmission beam; determines the signal power on the basis of the signal quality measured on the CMR and determines the interference power on the basis of the signal quality measured on the IMR; and, on the basis of the signal power and the interference power, determines the signal-to-noise ratio between the transmission beam and the receiving beam. The device and process enables a network side device and the user device can more rationally select a transmission beam and a receiving beam.