Frequency Hopping Grouping for Multi-Terminal Signal Detection
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Solution Overview
Problem
In wireless communications systems, when terminal devices move at low speeds, channel conditions remain stable, leading to inconsistent transmission performance, and network devices struggle to accurately detect multiple terminal devices using the same frequency hopping sequence, resulting in reduced detection performance.
Innovation Solution
A method involving grouping terminal devices into multiple groups, assigning unique pilot signals to each group, and sharing a pilot pool among groups, while ensuring each group uses distinct frequency resources for improved detection by the network device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple terminal devices use the same frequency hopping sequence, then frequency diversity and transmission reliability are improved, but the network device cannot detect each terminal device individually, reducing detection performance
Solution Approach 1:
The patent segments the frequency hopping sequence by introducing group identification information that divides terminal devices into different groups. Each group uses the same base frequency hopping sequence but with distinct group identifiers, allowing the network device to detect and differentiate between groups while maintaining frequency diversity benefits within each group.
Solution Approach 2:
The patent introduces group identification information as an intermediary element between the frequency hopping sequence and terminal device identification. This intermediary allows the network device to first detect the group identifier and then differentiate individual terminal devices within detected groups, resolving the detection conflict while preserving frequency hopping benefits.
2Measurement precision
If different frequency hopping sequences are allocated to each terminal device, then detection performance is improved, but the complexity of frequency hopping sequence management and allocation increases
Solution Approach 1:
The patent makes the frequency hopping sequence management system universal by introducing group identification that allows multiple terminal devices within the same group to share the same base frequency hopping sequence. This multi-functional approach enables the system to handle both individual device detection (through group ID) and frequency diversity (through shared hopping sequence), reducing overall management complexity.
Solution Approach 2:
The patent merges the frequency hopping sequence management for multiple terminal devices by allowing devices in the same group to share a common base sequence. Instead of managing completely separate sequences for each device, the system combines management efficiency with detection capability through the group identification mechanism.
3Productivity
If terminal devices send data simultaneously on the same frequency resource, then resource utilization is improved, but interference between terminal devices increases and detection becomes difficult
Solution Approach 1:
The patent segments the frequency resource usage by introducing group identification information. Terminal devices are divided into different groups that can be detected separately by the network device. This segmentation allows simultaneous transmission from multiple groups on the same frequency resource while reducing inter-device interference through group-level differentiation.
Solution Approach 2:
The patent applies local quality by allowing different groups of terminal devices to have different detection characteristics through group identification. While all terminal devices may transmit on the same frequency resource simultaneously, the network device can selectively detect and process signals from different groups with different local detection parameters, reducing overall interference impact.
Data Source
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AI summary
This application provides a transmission method, so as to improve performance of detecting a terminal device by a network device. The method includes: determining, by a network device, frequency hopping sequences of N terminal devices grouped into a plurality of groups in each of L adjacent slots, where any two terminal devices in each group of terminal devices use a same frequency resource, any two groups of terminal devices in each slot use different frequency resources, and each group of terminal devices in each slot includes a maximum of K terminal devices, pilot signals used by each group of terminal devices are elements in a set that includes K different pilot signals, and pilot signals used by any two terminal devices in each group in each slot are different; and sending, by the network device, first indication information to a first terminal device in the N terminal devices, where the first indication information is used to determine a frequency hopping sequence of the first terminal device and a pilot signal used by the first terminal device in each slot.