Uplink Control Resource Allocation for Overloaded PUSCH Repetitions
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Solution Overview
Problem
In 5G new radio (NR) systems, when uplink control information (UCI) is transmitted on physical uplink shared channels (PUSCHs) with limited resources, the channels become overloaded, leading to reduced reliability of information transmission due to excessive resource occupation by UCI.
Innovation Solution
The method involves determining an appropriate physical resource for UCI transmission based on equivalent transport block size (TBS) or adjusting the equalization parameter to ensure a moderate resource allocation, avoiding excessive resource occupation and improving transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UCI is transmitted on PUSCH with limited physical resources, then control information can be multiplexed on the data channel, but the channel becomes overloaded and transmission reliability decreases
Solution Approach 1:
The patent changes the parameter used for calculating UCI resource allocation from the original TBS (transport block size) to an equivalent TBS that reflects the actual available physical resources on the PUSCH. This parameter adjustment ensures that UCI resource calculation matches the actual channel capacity, preventing overload while maintaining multiplexing capability.
2Ease of manufacture
If TBS is calculated based on quantity of physical resources on first PUSCH, then resource allocation can be determined, but when PUSCH resources are small, the calculated UCI resources become excessively large causing overload
Solution Approach 1:
The patent introduces an equivalent TBS parameter that is specifically calculated based on the actual physical resources available on each PUSCH instance. This equivalent TBS replaces the original TBS in UCI resource calculations, ensuring that the calculated UCI resource quantity appropriately reflects the limited physical resources available, thereby preventing excessive resource allocation and channel overload.
3Loss of information
If UCI occupies excessive physical resources on overloaded PUSCH, then control information can be transmitted, but data transmission reliability is reduced
Solution Approach 1:
By changing the calculation parameter from original TBS to equivalent TBS, the patent ensures that UCI resource allocation is proportional to the actual data transmission capacity of the PUSCH. This prevents UCI from occupying excessive resources that would otherwise be available for data transmission, thereby maintaining data transmission reliability while still enabling control information transmission.
Data Source
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AI summary
Embodiments of the present invention disclose a communication method and device. The method includes: After receiving, from a network device, information about K uplink data channels for repeating a data packet for K times and information about a first time domain resource for transmitting first uplink control information UCI, in a case in which the first time domain resource overlaps a first uplink data channel of the K uplink data channels in time domain and the first uplink data channel is overloaded, a terminal device determines a physical resource for transmitting the first UCI, and then sends the first UCI to the network device by using the determined physical resource. In the embodiments of the present invention, when the resources for transmitting the UCI and the data packet overlap each other in time domain and are overloaded, the physical resource occupied by the UCI can be determined, so that reliability of UCI transmission is ensured and that reliability of information transmission can be improved.