Sidelink Bandwidth Allocation for Lower-Complexity Terminals
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Solution Overview
Problem
The high complexity and cost of terminal devices in sidelink communications systems due to the same reception and transmission bandwidth requirements.
Innovation Solution
Implementing a sidelink communication method and apparatus that reduces the bandwidth for transmitting and receiving sidelink channels/signals, with the transmitting bandwidth being greater than or equal to X and the receiving bandwidth being greater than or equal to Y, where X is less than or equal to Y, thereby optimizing bandwidth allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If terminal devices support the same reception bandwidth and transmission bandwidth, then communication compatibility is improved, but device complexity and cost increase
Solution Approach 1:
The patent segments the bandwidth support into two distinct parts: reception bandwidth and transmission bandwidth. Terminal devices can support different bandwidths for receiving versus transmitting signals, allowing the system to maintain compatibility while reducing individual device complexity. The network device coordinates these segmented bandwidths through scheduling information.
Solution Approach 2:
Different terminal devices are assigned different bandwidth characteristics based on their specific capabilities and requirements. The network device configures reception bandwidths and transmission bandwidths independently for each terminal, allowing each device to have optimized local bandwidth properties rather than requiring all devices to support identical bandwidths.
2Adaptability or versatility
If terminal devices support the same reception bandwidth and transmission bandwidth, then communication compatibility is improved, but device cost increases
Solution Approach 1:
The bandwidth support is segmented into separate reception and transmission components. This segmentation allows manufacturers to produce terminal devices with different bandwidth configurations at different cost levels, while maintaining overall system compatibility through network coordination.
Solution Approach 2:
The patent changes the bandwidth parameters independently for reception and transmission. By allowing different bandwidth values for receiving and transmitting, the system enables cost-effective device manufacturing while maintaining communication compatibility through network-managed parameter coordination.
3Device complexity
If the bandwidth for receiving radio frequency signals is reduced, then device complexity is reduced, but signal reception capability may be compromised
Solution Approach 1:
The network device performs preliminary scheduling actions by determining and notifying terminal devices of the reception bandwidth and transmission bandwidth before communication occurs. This preliminary coordination ensures that reduced bandwidth devices can still reliably receive signals by knowing in advance the allocated bandwidth parameters.
Solution Approach 2:
The system implements feedback mechanisms where terminal devices report their bandwidth capabilities to the network device, and the network device responds with scheduling decisions. This feedback loop ensures that signal reception reliability is maintained even with reduced device bandwidth by dynamically adjusting allocations based on actual device capabilities.
Data Source
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AI summary
The present application provides a sidelink communication method and apparatus. The method comprises: a terminal device sends or receives a first sidelink channel/signal, wherein bandwidth of a frequency domain resource occupied by the terminal device for sending or receiving the first sidelink channel/signal is a first bandwidth, the bandwidth of the terminal device receiving a radio frequency signal is a second bandwidth, the first bandwidth is greater than or equal to X, the second bandwidth is greater than or equal to Y, both X and Y are positive numbers, and X is less than or equal to Y. By reducing the bandwidth of a frequency domain resource occupied by a terminal device in a sidelink communications system for sending or receiving a sidelink channel/signal and the bandwidth of the terminal device receiving a radio frequency signal, and enabling the bandwidth of a frequency domain resource occupied by the terminal device for sending or receiving a sidelink channel/signal to be less than or equal to the bandwidth of the terminal device receiving a radio frequency signal, the complexity and cost of the terminal device are reduced.