Serving TRP Selection Using Reference Signal Arrival and Delay Spread
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Solution Overview
Problem
In distributed multiple-input multiple-output (MIMO) wireless communication systems, selecting an appropriate serving transmit and receive point (TRP) for a terminal is challenging due to the complexity of signal propagation from multiple TRPs, which affects system performance.
Innovation Solution
A method where a terminal measures reference signals from multiple TRPs to determine arrival times and delay spreads, and communicates these measurements to a network device, which then selects and indicates the serving TRP based on these metrics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple TRPs provide service for one terminal in distributed MIMO system, then system capacity and coverage are improved, but TRP selection complexity and signal processing difficulty increase
Solution Approach 1:
The terminal performs preliminary measurement of reference signals from multiple TRPs before actual data transmission, determining arrival times and delay spreads in advance. This preliminary action provides the network device with channel characteristics information, enabling informed TRP selection without real-time complexity
Solution Approach 2:
Measurement results (arrival time and delay spread) act as intermediary parameters between the terminal and network device. These intermediaries translate complex multi-TRP signal characteristics into selectable metrics, simplifying the TRP selection process while maintaining system capacity benefits
2Reliability
If reference signal measurement and TRP selection is performed, then signal quality and system performance are improved, but measurement and processing time are consumed
Solution Approach 1:
Reference signal measurement and TRP selection are performed in advance before actual data transmission. The terminal measures reference signals from multiple TRPs and determines channel characteristics (arrival time, delay spread) beforehand, so that TRP selection is already completed when data transmission begins, minimizing time loss
Solution Approach 2:
The terminal measures reference signals from all candidate TRPs (excessive action) to ensure the best TRP is selected, rather than measuring only a subset. This comprehensive measurement approach guarantees optimal signal quality while the measurements are performed in advance to minimize time impact
Data Source
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AI summary
Disclosed in the embodiments of the present disclosure are a method and apparatus for determining a service transmit and receive point, which can be applied to the technical field of communications. The method, which is executed by a terminal device, comprises: measuring a reference signal in a reference signal group sent by a network device, and determining a measurement result, wherein the measurement result comprises the time of arrival and/or delay spread of the reference signal in the reference signal group; sending the measurement result to the network device; and receiving indication information sent by the network device, wherein the indication information is used for indicating a service transmit and receive point (TRP). Thus, a network device can select an appropriate TRP for a terminal device, thereby improving the performance of a MIMO system.