Reception Timing Configuration for Distributed MIMO
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Solution Overview
Problem
In existing LTE systems, the terminal device has only one reception timing for one carrier, leading to degraded data reception performance due to different transmission points at various geographical locations transmitting data at different time points.
Innovation Solution
A method and device configuration that sets multiple reception timing parameters for a terminal device, allowing it to receive data from multiple transmission points cooperatively, by configuring and indicating reception timing parameters corresponding to each transmission point, thereby improving data reception performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal device uses only one reception timing for one carrier in an existing LTE system, then the device complexity is reduced and the system is easier to operate, but the reception performance degrades when data is transmitted from multiple transmission points at different geographical locations
Solution Approach 1:
The patent divides the single reception timing into multiple reception timings, with each timing corresponding to a specific transmission point. The network device configures multiple reception timing parameters (e.g., timingOffsetA, timingOffsetB) for the terminal device, allowing each transmission point to use its own optimized reception timing. This segmentation resolves the contradiction by maintaining simple device operation while improving reception performance through point-specific timing optimization.
2Reliability
If multiple reception timing parameters are configured for different transmission points, then the reception performance and signal reliability are improved, but the device complexity and timing configuration complexity increase
Solution Approach 1:
The patent applies local quality by configuring different reception timing parameters for different transmission points based on their specific characteristics. Each transmission point receives a tailored timing configuration (e.g., different timingOffset values) that is optimized for its geographical location and channel conditions. This allows the system to achieve high signal reliability through localized optimization while managing complexity through structured parameter configuration.
Solution Approach 2:
The patent changes the reception timing parameters dynamically according to the transmission point and channel conditions. The network device can adjust timingOffset values, configure different timing relationships between reference signals and data, and modify reception timing based on feedback from the terminal device. This parameter flexibility enables the system to maintain high reliability while adapting to varying conditions without requiring fundamental architectural changes.
3Ease of operation
If a single reception timing is used for all transmission points, then the timing configuration is simpler and easier to manage, but the data reception performance degrades due to different propagation delays from geographically separated transmission points
Solution Approach 1:
The patent segments the timing configuration into multiple independent timing parameters, each associated with a specific transmission point. Instead of using a single timing value for all transmission points, the system configures separate timingOffset parameters (e.g., timingOffsetA for transmission point A, timingOffsetB for transmission point B). This segmentation maintains ease of operation through structured configuration while eliminating the performance degradation caused by uniform timing assumptions.
Data Source
AI summary
A reception timing configuration method and a communications device are provided. The method includes: configuring, by a first communications device for a second communications device, a reception timing parameter corresponding to transmission, where the reception timing parameter includes at least two timing points respectively corresponding to at least two transmission points, and the at least two transmission points are configured to transmit downlink data to the terminal device cooperatively; and sending, by the first communications device, indication information to the second communications device, where the indication information is used to indicate the reception timing parameter. According to the method, there may be a plurality of corresponding reception timings when different data is sent by using a same frequency.