PUCCH Transmission Parameter Adaptation for 5G Unlicensed Bands
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Solution Overview
Problem
In 5G communications systems operating on unlicensed bands, the existing PUCCH transmission methods lead to low resource utilization due to inflexible configuration based on a 20 MHz bandwidth, which is not always necessary for terminal devices, resulting in inefficient use of resources.
Innovation Solution
The method adjusts PUCCH transmission parameters such as the number of interlaces, OFDM symbols, spreading factor, and orthogonal sequences based on the characteristic parameters of the UCI to be fed back, allowing for dynamic configuration that meets specific preset conditions and optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the PUCCH occupies at least one entire interlace in 20 MHz bandwidth, then the transmission meets the interlaced resource block structure requirement, but the resource utilization becomes low when the terminal device does not necessarily need such configuration
Solution Approach 1:
The patent applies dynamics by enabling the PUCCH to dynamically select between occupying an entire interlace or a partial interlace based on the actual UCI payload size. When the UCI requires fewer resources, the terminal device can transmit on only a portion of the interlace, making the resource allocation flexible and adaptive rather than fixed, thus resolving the contradiction between reliable transmission and resource utilization
Solution Approach 2:
The patent changes the parameter of interlace occupation from a fixed state (entire interlace) to a variable state (partial or entire interlace) based on the UCI payload characteristics. This parameter change allows the system to adapt resource allocation to actual needs, improving resource utilization while maintaining transmission reliability when necessary
2Device complexity
If a large bandwidth (80 or 100 MHz) of the unlicensed band is used, then the implementation complexity of base station and terminal device is reduced, but the resource allocation flexibility decreases
Solution Approach 1:
The patent segments the wideband unlicensed spectrum into multiple interlaces, allowing the PUCCH to be allocated on a per-interlace basis rather than requiring the entire wideband. This segmentation enables fine-grained resource allocation within the large bandwidth, maintaining the simplicity of wideband operation while adding the flexibility to allocate resources precisely where needed
Data Source
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AI summary
Embodiments of the present disclosure relate to the field of communications technologies, and disclose an information processing method, a device, and a computer-readable storage medium to resolve a problem of low resource utilization. The method includes: in a case that a PUCCH transmission format based on an interlace structure is scheduled for a terminal device, determining, based on a characteristic parameter of UCI to be fed back, a transmission parameter for transmitting a PUCCH. The embodiments of the present disclosure can improve resource utilization.