XDD Cell Configuration for Uplink Coverage and Low-Latency Signaling
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Solution Overview
Problem
Existing wireless communication systems face challenges in effectively utilizing cross-division duplex (XDD) methods to enhance uplink coverage and reduce latency, particularly in TDD frequency bands.
Innovation Solution
The proposed method involves configuring first and second uplink/downlink configurations in frequency domain, utilizing cross-division duplex (XDD) or subband non-overlapping full duplex, and managing resource allocation through indication signaling to avoid simultaneous transmissions on overlapping channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cross-division duplex (XDD) method is adopted to enhance uplink coverage, then uplink coverage is improved, but system complexity increases due to additional configuration requirements
Solution Approach 1:
The patent segments the frequency domain into first and second frequency ranges, with the first range allocated for downlink and the second range allocated for uplink transmissions. This segmentation enables the base station to simultaneously transmit downlink signals and receive uplink signals without interference, thereby improving uplink coverage while managing system complexity through structured resource allocation.
Solution Approach 2:
The patent introduces a frequency domain dimension to solve the uplink coverage problem. By allocating specific frequency ranges for different transmission directions (downlink and uplink), the system achieves simultaneous bidirectional communication, enhancing uplink coverage without requiring additional time resources that would increase latency.
2Productivity
If time division duplex (TDD) method is used, then frequency efficiency is improved, but uplink coverage and latency performance are insufficient
Solution Approach 1:
The patent segments the frequency domain into multiple ranges, assigning the first frequency range for downlink transmissions and the second frequency range for uplink transmissions. This segmentation allows simultaneous bidirectional communication, maintaining frequency efficiency while significantly improving uplink coverage and reducing latency compared to traditional TDD methods.
3Reliability
If resource allocation is optimized for XDD systems, then uplink coverage and latency are improved, but indication signaling overhead increases
Solution Approach 1:
The patent performs preliminary configuration by pre-defining the first and second frequency ranges for downlink and uplink transmissions, respectively. The base station configures these frequency allocations in advance, allowing the terminal device to understand the resource allocation pattern without requiring complex real-time signaling, thereby reducing signaling overhead while maintaining low latency.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The present disclosure provides a method and device for receiving and transmitting information. According to an aspect of the present disclosure, a method for a network device is provided, which includes transmitting cell configuration information to a terminal device, wherein the cell configuration information includes a first downlink configuration information and a first uplink configuration information, and also includes at least one of a second uplink configuration information and a second downlink configuration information. The first uplink and the first downlink are related in frequency domain; wherein the second uplink satisfies at least one of the following conditions: the second uplink and the first downlink are related in frequency domain; the second uplink and the first uplink are related in frequency domain, wherein the second downlink satisfies at least one of the following conditions: the second downlink and the first downlink are related in frequency domain; the second downlink and the second uplink are related in frequency domain, and receiving, from the terminal device, an uplink signal transmitted by the terminal device based on the cell configuration information.