Sidelink Channel Mapping Across Interlaced Lowest Subchannels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing demand for high data transmission rates in wireless communication systems necessitates efficient methods for direct communication between devices, particularly in licensed and unlicensed spectra, to manage the growing volume and frequency of device interactions.
Innovation Solution
A method and device for transmitting and receiving channels in a wireless communication system by mapping physical control and shared channels to resource blocks within the lowest subchannel in a frequency domain, following a specific order of interlace and RB index, with configurations for bandwidth parts and subchannels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If direct communication between devices is implemented to reduce network node burden, then communication efficiency is improved, but resource allocation complexity increases
Solution Approach 1:
The patent segments the frequency domain into multiple interlaces, each containing non-contiguous resource blocks. This segmentation allows direct communication devices to allocate resources in a structured manner across different frequency segments, reducing the complexity of managing contiguous resource allocation while maintaining communication efficiency.
Solution Approach 2:
The patent introduces interlace index as an additional parameter for resource block identification, changing the resource allocation parameters from simple contiguous indexing to a two-dimensional system (interlace index and resource block index within interlace). This parameter change enables more flexible and efficient resource management for direct communication.
2Quantity of substance
If multiple subchannels are used for physical shared channel transmission, then data capacity is improved, but control information mapping complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-defining the mapping rule that control information is always mapped to the lowest subchannel among the at least one subchannel used for physical shared channel transmission. This predetermined mapping strategy simplifies the control information placement process when multiple subchannels are employed, reducing mapping complexity while maintaining high data capacity.
3Reliability
If interlace-based resource allocation is implemented, then frequency diversity is improved, but resource block mapping complexity increases
Solution Approach 1:
The patent changes the resource block mapping approach by introducing interlace indexing, where resource blocks are organized into multiple interlaces with specific spacing patterns. This parameter change enables frequency diversity through distributed resource allocation across the frequency spectrum while providing a systematic mapping procedure that reduces complexity compared to ad-hoc frequency diverse allocation.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
In the present specification, a physical control channel is mapped to a lowest subchannel from among subchannels for a physical shared channel. When the lowest subchannel is related to an interface, the physical control channel is mapped to resource blocks in the lowest subchannel first in the order an interface index increases and then in the order a resource block index increases, in a frequency domain.