Dynamic Reference Signal Frequency Band Switching
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Solution Overview
Problem
In LTE systems, the efficiency of sending reference signals is low due to complex networking environments, and existing methods do not allow for selective frequency band usage based on specific communication conditions, leading to increased power consumption and interference.
Innovation Solution
A method and apparatus that detect predetermined conditions in a first frequency band and instruct a terminal device to send reference signals in a second frequency band, optimizing signal intensity, quality, and error rate, allowing for selective high-frequency band usage based on geographical position and MIMO antenna configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reference signals are sent continuously in the first frequency band, then channel evaluation can be performed, but power consumption increases and uplink interference occurs
Solution Approach 1:
The patent implements dynamic frequency band switching where the terminal device alternates between first and second frequency bands for sending reference signals based on channel conditions. The network device configures multiple frequency bands and the terminal selectively uses them, making the reference signal transmission dynamic rather than static, thereby reducing continuous transmission in one band and lowering power consumption while maintaining channel evaluation capability
Solution Approach 2:
The patent employs periodic reference signal transmission in alternating frequency bands. The terminal device sends reference signals in the first frequency band during certain periods and switches to the second frequency band for other periods, creating a periodic pattern that reduces continuous transmission overhead and interference while still providing sufficient channel state information for evaluation
2Reliability
If reference signals are sent in the first frequency band, then channel sounding is achieved, but uplink interference increases
Solution Approach 1:
The patent segments the reference signal transmission across multiple frequency bands (first and second frequency bands). Instead of concentrating all reference signal transmissions in one band, the system divides them and alternates between bands, thereby distributing the interference impact and reducing overall uplink interference in any single frequency band while maintaining comprehensive channel sounding capability
Solution Approach 2:
The patent introduces a frequency band dimension for reference signal transmission diversity. By switching between first and second frequency bands, the system adds a frequency domain dimension to the transmission strategy, allowing channel sounding to be performed across multiple frequency dimensions while reducing interference concentration in any single frequency band
3Productivity
If frequency band switching is implemented, then transmission efficiency improves, but system complexity increases
Solution Approach 1:
The patent introduces a network device as an intermediary that manages the frequency band switching process. The network device configures multiple frequency bands and provides switching instructions to the terminal device, centralizing the complexity management at the network side rather than requiring complex terminal-side decision-making, thereby improving transmission efficiency while controlling overall system complexity
Solution Approach 2:
The patent changes the frequency band parameter dynamically based on channel conditions and transmission requirements. The system configures multiple frequency bands with different characteristics and switches between them by changing the operating frequency parameter, thereby optimizing transmission efficiency for different channel conditions while managing complexity through parameter-based control rather than structural complexity
Data Source
AI summary
A method for sending signaling, a method and apparatus for sending a reference signal, and a system include: detecting, with an access network equipment, whether communications of a terminal device in a first frequency band satisfy a predetermined condition; and sending a reference signal in a second frequency band by the terminal device after receiving a predetermined instruction.