RRM Measurement Scheduling for High-Speed eDRX Paging
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Solution Overview
Problem
In high-speed scenarios like high-speed railways, the power consumption of user equipment (UE) for radio resource management (RRM) measurements is excessively high due to frequent cell handovers, especially for lightweight devices with fewer antennas, leading to increased power consumption and reduced standby time.
Innovation Solution
Implementing an RRM measurement method where a network device provides indication information to UE to perform a first or second type of RRM measurement behavior, allowing UE to start intra-frequency cell measurements before an extended discontinuous reception (eDRX) cycle and receive paging when the eDRX cycle arrives, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE performs intensive RRM measurement at cell edge in high-speed scenario, then cell handover reliability is improved, but power consumption increases
Solution Approach 1:
The network performs RRM measurement configuration and indication transmission to the UE in advance before the UE actually performs measurements. The network configures measurement parameters, sets measurement triggers, and provides measurement indications proactively, allowing the UE to execute measurements only when necessary rather than continuously, thus reducing power consumption while maintaining handover reliability
Solution Approach 2:
The network dynamically adjusts RRM measurement parameters including measurement frequency, measurement quantity, and measurement timing based on UE speed, signal quality, and network conditions. By changing these parameters adaptively, the system reduces unnecessary measurements in stable conditions while ensuring adequate measurements when handover is needed, resolving the contradiction between reliability and power consumption
2Measurement precision
If UE increases quantity of measurement samples, then measurement accuracy is improved, but power consumption increases
Solution Approach 1:
Instead of requiring the UE to continuously perform maximum quantity of measurement samples, the network provides measurement indications that trigger partial measurements only when necessary. The UE performs measurement samples based on network-triggered indications rather than exhaustive continuous sampling, achieving sufficient measurement accuracy for handover decisions while significantly reducing power consumption from unnecessary excessive measurements
3Reliability
If UE performs RRM measurement frequently, then cell edge coverage is improved, but standby time decreases
Solution Approach 1:
The network configures periodic RRM measurement opportunities with configurable periods and triggers measurements only at specific intervals rather than continuously. The UE performs measurements periodically based on network configuration and indications, ensuring cell edge coverage reliability while allowing the device to remain in low-power states between measurement periods, thus extending standby time
Data Source
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AI summary
This application discloses a radio resource management measurement method, a terminal device, and a network device. The RRM measurement method includes: obtaining indication information from a network, where the indication information is used to indicate a type of RRM measurement behavior of a terminal device in a high-speed scenario, and the type of RRM measurement behavior includes a first type of RRM measurement behavior or a second type of RRM measurement behavior; and in a case that the indication information indicates the first type of RRM measurement behavior, starting RRM measurement of an intra-frequency cell before an eDRX cycle arrives, and receiving a paging message when the eDRX cycle arrives. Therefore, power consumption of the terminal device can be reduced in embodiments of this application.