Base Station Reference Signal Transmission Mode Adaptation
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Solution Overview
Problem
In next-generation wireless communication systems, inter-cell interference causes deterioration in User Equipment (UE) performance due to shared resource allocation for User Equipment-specific Reference Signals (URS), leading to reduced channel estimation capabilities and increased complexity in signal transmission/reception.
Innovation Solution
A method and apparatus where a first Base Station (BS) receives control information about the RS transmission mode of adjacent BSs and adjusts its data transmission to avoid resource conflicts, ensuring that each cell transmits signals in different Resource Elements (REs, thereby preventing interference and improving channel estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the same resource is used for URS transmission in adjacent cells, then resource utilization is improved, but inter-cell interference increases and channel estimation capability deteriorates
Solution Approach 1:
The patent segments the time-frequency resources for URS transmission by introducing different transmission modes (first mode and second mode) and configuring cells to use different modes. This segmentation allows adjacent cells to transmit URS on different resources, eliminating inter-cell interference while maintaining resource utilization efficiency.
2Object-affected harmful factors
If different transmission modes are used in adjacent cells, then inter-cell interference is reduced, but system complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the network configures different URS transmission modes for different cells based on interference conditions. The base station receives configuration information from the network and adjusts transmission modes accordingly, allowing dynamic interference management without requiring complex processing at the UE side.
Solution Approach 2:
The patent changes the transmission mode parameter (first mode vs. second mode) to differentiate resource allocation between adjacent cells. By modifying this key parameter, the system achieves interference reduction through simple mode switching rather than complex signal processing changes.
3Productivity
If URS is transmitted on data-allocated RBs, then resource efficiency is improved, but interference from adjacent cells using same resources increases
Solution Approach 1:
The patent introduces a new dimension for resource differentiation by using transmission mode as an additional layer of resource separation. While traditional resource allocation operates in the time-frequency domain, the transmission mode adds another dimension that allows cells to share time-frequency resources without interference by operating in different mode dimensions.
Data Source
AI summary
A method of transmitting data in a wireless communication, by a first Base Station (BS) is provided. The method includes receiving control information including information related to transmission of a Reference Signal (RS) of at least one second BS from the at least one second BS adjacent to the first BS and transmitting data by using a preset method based on the control information when an RS transmission mode of the at least one second BS is different from an RS transmission mode of the first BS.