Reference Signal Configuration for Interference Measurement
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Solution Overview
Problem
In dynamic time division duplex (D-TDD) technologies, co-channel cross interference between neighboring cells is a challenge, and existing methods lack standardized methods for interference/channel measurement between base stations or user equipment, necessitating improved reference signal configuration for effective interference management.
Innovation Solution
A signal transmission method where a network device configures a terminal device to send a reference signal using resources determined by the terminal device's public cell identity, allowing for interference/channel measurement between terminal devices, enhancing reference signal utilization and distinguishing between interference cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reference signals are configured for interference/channel measurement between terminal devices in D-TDD, then measurement precision is improved, but device complexity increases due to additional signaling overhead
Solution Approach 1:
The patent reuses existing uplink and downlink reference signals (such as SRS, PUSCH, PDSCH, PUCCH) for the additional function of inter-UE interference and channel measurement. By making existing signals multi-functional, the system achieves precise measurement capabilities without adding new dedicated reference signals, thus avoiding increased device complexity while improving measurement precision.
2Productivity
If existing reference signals are reused for inter-UE interference measurement, then productivity is improved by reducing overhead, but measurement precision may be compromised due to signal resource constraints
Solution Approach 1:
The patent segments the measurement process by configuring different terminal devices to transmit reference signals on different time-frequency resources or with different parameters (such as different cyclic shifts, orthogonal cover codes, or resource blocks). This segmentation allows multiple measurements to occur simultaneously without mutual interference, maintaining measurement precision while improving network productivity through efficient resource utilization.
Solution Approach 2:
The patent enables dynamic configuration of reference signal parameters (such as time-frequency resources, transmission power, and sequence parameters) based on current network conditions and interference scenarios. This dynamic adaptation allows the system to optimize measurement precision for each specific situation while maintaining high network throughput by avoiding unnecessary overhead.
3Ease of operation
If configuration information is sent to terminal devices for reference signal transmission, then ease of operation is improved, but loss of time increases due to additional signaling overhead
Solution Approach 1:
The patent performs reference signal configuration in advance during network setup or idle periods, so that when interference measurement is needed, the terminal devices already have the necessary configuration information. This preliminary configuration reduces the time required for actual measurement operations while maintaining ease of operation, as the configuration is done once rather than repeatedly during measurements.
Solution Approach 2:
The patent enables terminal devices to autonomously determine their reference signal transmission parameters based on pre-configured rules and their own identity information (such as cell ID or device ID). This self-service approach eliminates the need for continuous network signaling, reducing time loss while maintaining ease of operation through automated local decision-making.
Data Source
AI summary
Embodiments of this application provide a signal transmission method and apparatus. The method includes: receiving, by a terminal device, configuration information sent by a network device, where the configuration information is used to instruct the terminal device to send a reference signal, and a resource used to transmit the reference signal is determined based on a public cell identity of a cell to which the terminal device belongs; and sending, by the terminal device, the reference signal based on the configuration information by using the resource. According to the signal transmission method and apparatus in the embodiments of this application, an existing reference signal can be used to perform interference/channel measurement between terminal devices, so that a terminal device on a receiving side can distinguish between interference cells while reference signal utilization is improved.