Wireless Measurement Enhancement Using SINR Reporting
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Solution Overview
Problem
Current LTE network protocols face challenges in accurately determining cell handover and inter-cell interference coordination due to limitations in measurement bandwidth and the use of RSRP/RSRQ, which can lead to mis-determination and reduced network performance, especially in heterogeneous networks and CoMP scenarios.
Innovation Solution
Introducing a new measurement amount, such as signal-to-interference-plus-noise ratio (SINR) or signal-to-noise ratio (SNR), which is reported by UE to the base station, assisting in cell selection, reselection, handover decisions, and inter-cell interference coordination, while also regulating measurement bandwidth and frequency range to provide accurate information for better network performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RSRP or RSRQ measurement amounts are used for cell handover decision and inter-cell interference coordination, then the measurement process is simple, but the accuracy of handover decision and interference coordination is insufficient
Solution Approach 1:
The patent segments the measurement process by introducing multiple measurement amounts (RSRP, RSRQ, and SINR) measured on different bandwidths (cell bandwidth and UE bandwidth). This segmentation allows the system to capture both overall signal quality and UE-specific reception conditions, thereby improving measurement accuracy without requiring a complete redesign of the measurement framework.
Solution Approach 2:
The patent changes the measurement parameters by adding SINR as a new measurement amount and introducing bandwidth as a dimensional parameter. By measuring RSRP, RSRQ, and SINR across different bandwidths (cell bandwidth and UE bandwidth), the system transforms the measurement from a single-parameter approach to a multi-parameter approach, significantly enhancing the precision of handover decisions and interference coordination.
2Loss of information
If measurement bandwidth is limited by allowedmeasbandwidth, then the measurement process is manageable, but the network cannot know the actual measurement bandwidth adopted by UE
Solution Approach 1:
The patent implements feedback by requiring the UE to report not only the measurement amounts (RSRP, RSRQ, SINR) but also the actual measurement bandwidth used. This feedback mechanism allows the network to know the precise bandwidth on which measurements were performed, enabling better interpretation of measurement results and more accurate handover decisions and interference coordination.
Solution Approach 2:
The patent adds bandwidth as an additional dimension to the measurement reporting framework. Instead of only reporting measurement amounts, the system now reports measurement amounts across multiple bandwidth dimensions (cell bandwidth and UE bandwidth), providing the network with comprehensive information about the measurement conditions and improving overall network management capability.
3Reliability
If RSRP or RSRQ is used for heterogeneous networks and CoMP scenarios, then the existing measurement framework is maintained, but the measurement results cannot achieve better handover decision or interference coordination effects
Solution Approach 1:
The patent applies preliminary action by having the UE perform multiple measurements (RSRP, RSRQ, and SINR) on both cell bandwidth and UE bandwidth before making handover decisions. This preliminary multi-dimensional measurement provides the network with comprehensive information about signal quality and interference conditions, enabling more reliable handover decisions and interference coordination in heterogeneous networks and CoMP scenarios.
Data Source
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AI summary
Embodiments of the present invention provide methods and apparatuses at a user equipment, UE, and a base station respectively, for enhancing measurement in a wireless communication system. The method at the UE includes: obtaining, by a user equipment, UE, according to a measurement period, a measurement amount comprising a signal to interference plus noise ratio, SINR, based on a reference signal, wherein the SINR comprises a signal to interference plus noise ratio being SINR = RSRP / (Intf1 + noise1) measured on a resource element, RE, comprising the reference signal, and wherein reference signal received power, RSRP, is a valid signal on the RE comprising the reference signal, Intf1 is an interference signal on the RE comprising the reference signal, noise1 is a noise signal on the RE comprising the reference signal; and reporting, by the UE, the measurement amount to a base station. The method at the base station includes: receiving the measurement amount reported by a UE, and performing inter-cell interference coordination or cell handover decision according to the measurement amount. The measurement period may be included in a message carrying configuration information sent from the base station to the UE, and be associated with one or more of measurement accuracy, power consumption of the UE, and a reference signal periodicity.