Uplink Control Channels Using Interlaces for Unlicensed Spectrum Sharing
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Solution Overview
Problem
Efficient and flexible allocation of finite resources for transmitting uplink control channels from multiple UEs over an unlicensed radio frequency spectrum band is challenging, as existing technologies do not effectively manage resource sharing among UEs.
Innovation Solution
The method involves generating uplink control information at a wireless device and transmitting it over an interlace of a component carrier in the unlicensed radio frequency spectrum band, using non-contiguous concurrent resource blocks and joint convolutional coding to distribute acknowledgement information across these blocks, allowing for flexible resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple UEs transmit uplink control information simultaneously over an unlicensed spectrum band, then the data transmission capacity is enhanced, but resource allocation efficiency deteriorates due to finite available resources
Solution Approach 1:
The unlicensed spectrum band is divided into multiple interlaces, where each interlace consists of non-contiguous resource blocks. This segmentation allows multiple UEs to be assigned to different interlaces, enabling simultaneous transmissions while maintaining efficient resource utilization. The patent specifically divides the spectrum into interlaces with specific spacing patterns to avoid interference and optimize capacity.
Solution Approach 2:
The patent introduces a new dimension for resource allocation by using interlace-based structure with non-contiguous resource blocks spaced at specific intervals. This dimensional approach allows multiple UEs to share the spectrum efficiently by allocating resources across different frequency dimensions rather than simply dividing contiguous blocks, thereby enhancing capacity without sacrificing allocation efficiency.
2Adaptability or versatility
If resources are allocated to multiple UEs for uplink control channel transmission, then resource sharing flexibility is improved, but transmission reliability deteriorates due to interference and resource contention
Solution Approach 1:
By segmenting the spectrum into multiple interlaces with non-contiguous resource blocks, the patent enables flexible assignment of different interlaces to different UEs based on channel conditions and traffic requirements. This segmentation isolates transmissions spatially and frequency-wise, reducing interference between UEs and maintaining reliability even as flexibility increases.
Solution Approach 2:
The patent applies local quality by allowing different UEs to use different interlace configurations and resource block patterns tailored to their specific channel conditions. Each UE can be assigned resources with optimal spacing and allocation patterns suited to its local environment, thereby maintaining high transmission reliability while achieving flexible resource sharing across the network.
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AI summary
Techniques are described for wireless communication. A first method includes generating uplink control information at a wireless device, and transmitting the uplink control information over an interlace of a component carrier of an unlicensed radio frequency spectrum band. The interlace includes a plurality of non-contiguous concurrent resource blocks in the unlicensed radio frequency spectrum band, and at least two resource blocks in the interlace include different portions of the uplink control information. A second method includes generating uplink control information at a wireless device, and transmitting the uplink control information over an uplink control channel of an unlicensed radio frequency spectrum band. Resources of the uplink control channel are divided into a plurality of discrete dimensions and the uplink control information of the wireless device is transmitted over a number of the discrete dimensions allocated to the uplink control information of the wireless device.