Base Station Measurement Parameter Configuration for LTE Handover
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in LTE and LTE-Advanced networks, narrowband measurements by mobile stations are inaccurate when serving and neighboring cells use different bandwidths, leading to potential handover failures and service disruptions due to inadequate channel condition estimation.
Innovation Solution
A method and device where a base station acquires frequency band usage information of neighboring cells and determines measurement parameters, including measurement frequency points and bandwidths, to accurately guide mobile stations in performing measurements, thereby improving measurement accuracy and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the mobile station performs measurement on the center 6 RBs in a fixed manner, then the measurement process is simple, but the measurement accuracy deteriorates when serving and neighboring cells use different bandwidths
Solution Approach 1:
The patent makes the measurement bandwidth dynamic by allowing it to adapt based on the bandwidth configuration of neighboring cells. Instead of a fixed center 6 RBs approach, the measurement bandwidth is adjusted to match the actual neighboring cell bandwidth, ensuring accurate measurements whether the neighboring cell uses 1.4MHz, 3MHz, 5MHz, or other bandwidths.
Solution Approach 2:
The patent applies local quality by configuring measurement bandwidth specifically for each neighboring cell based on its individual bandwidth characteristics. Different measurement bandwidths are assigned to different neighboring cells depending on their bandwidth configurations, rather than using a uniform fixed bandwidth for all measurements.
2Device complexity
If the measurement bandwidth is fixed at center 6 RBs, then the UE processing complexity is reduced, but the measurement accuracy deteriorates in heterogeneous network scenarios
Solution Approach 1:
The patent changes the measurement bandwidth parameter dynamically based on neighboring cell configurations. The network configures different measurement bandwidth values (e.g., 1.08MHz, 1.74MHz, 2.76MHz, etc.) according to the actual neighboring cell bandwidth, allowing accurate measurements while keeping the UE implementation relatively simple through standardized bandwidth options.
3Measurement precision
If different measurement bandwidths are configured for different neighboring cells, then the measurement accuracy is improved, but the signaling overhead and system complexity increase
Solution Approach 1:
The patent performs preliminary configuration of measurement bandwidths through RRC signaling before measurements are executed. The network pre-configures the appropriate measurement bandwidth for each neighboring cell based on its bandwidth characteristics, so that the UE can directly use these pre-determined configurations without requiring complex real-time calculations or adjustments during measurement execution.
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
A method and device for indicating measurement parameters are disclosed. The method for indicating the measurement parameters includes: a base station of a serving cell acquiring frequency band usage information of neighboring cells of the serving cell; according to a frequency band used by the base station itself and the obtained frequency band usage information of all the neighboring cells, the base station of the serving cell determining measurement parameters of a mobile station which accesses the base station of the serving cell, wherein, the measurement parameters include: measurement frequency points and measurement bandwidths at all the measurement frequency points; and the base station of the serving cell indicating the measurement parameters to the mobile station which accesses the base station of the serving cell. With the method and device of the present invention, a flexibility of measurement bandwidths and an accuracy of measurement can be improved.