Dynamic Reference Signal Transmission Pattern for Cellular Mobility
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in power consumption and interference due to continuous reference signal transmission across multiple beams, which affects handover performance and radio resource usage.
Innovation Solution
A method for dynamically determining reference signal transmission patterns based on location-related parameters and handover statistics, such as geographical position, traveling speed, and interference, to optimize transmission frequency and timing for mobility measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reference signals are transmitted continuously in all beams, then mobility measurement accuracy is improved, but power consumption and interference increase significantly
Solution Approach 1:
The patent implements periodic reference signal transmission instead of continuous transmission. The network node transmits reference signals in a periodic pattern across multiple beams, allowing wireless communication devices to perform mobility measurements at regular intervals. This periodic approach maintains measurement accuracy while significantly reducing power consumption and interference compared to continuous transmission.
Solution Approach 2:
The patent employs dynamic reference signal transmission where the transmission pattern is adapted based on current network conditions, device location, and mobility state. The network node dynamically selects which beams to activate for reference signal transmission, adjusting the transmission pattern in real-time to maintain measurement accuracy while minimizing resource usage.
2Reliability
If reference signals are transmitted frequently in multiple beams, then handover performance is improved, but radio resource usage increases
Solution Approach 1:
The patent applies local quality by transmitting reference signals selectively in specific beams based on device location and mobility requirements. Instead of uniform transmission across all beams, the network node identifies and activates only the relevant beams for each device, ensuring handover performance is maintained for devices that need it while conserving radio resources.
Solution Approach 2:
The patent segments the reference signal transmission into multiple time slots and beam groups. Rather than transmitting to all beams simultaneously, the network node divides the transmission into sequential segments across different time periods, allowing devices to measure mobility in phases. This segmentation reduces peak resource usage while maintaining overall handover reliability.
3Adaptability or versatility
If reference signal transmission is activated for candidate beams, then beam handover capability is improved, but system complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring reference signal transmission patterns and beam candidate lists before handover events occur. The network node prepares and stores transmission patterns for multiple potential candidate beams in advance, so when a handover is needed, the device can immediately measure and evaluate pre-identified candidates without requiring complex real-time decision-making.
Data Source
AI summary
A method for a network node of a cellular communication network is disclosed. The network node is adapted to communicate with a wireless communication device. The method comprises acquiring location-related parameters of the wireless communication device, dynamically determining—based on the acquired location-related parameters—a transmission pattern of reference signals (wherein the reference signals are for mobility measurements by the wireless communication device), indicating the determined transmission pattern to the wireless communication device and transmitting the reference signals in accordance with the determined transmission pattern. Dynamically determining the transmission pattern may be further based on handover statistics associated with the location-related parameters. The location-related parameters may comprise at least one of a geographical position of the wireless communication device and a travelling speed of the wireless communication device. The location-related parameters may further comprise a travelling direction of the wireless communication device. Corresponding arrangement, network node and computer program product are also disclosed.