Dynamic Channel Allocation for 5G NR Resource Efficiency
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Solution Overview
Problem
In 5G NR systems, efficiently configuring SR and ACK/NACK channels to minimize resource waste and ensure low peak-to-average power ratio (PAPR) is challenging, especially when terminals need to simultaneously send ACK/NACK and SR, leading to unnecessary resource reservation.
Innovation Solution
The network device configures a first channel for SR and indicates multiple second channels for ACK/NACK, allowing terminals to select channels based on scheduling request and acknowledgement information, reducing the number of SR channels reserved and optimizing resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the quantity of ACK/NACK channels reserved for the terminal is made the same as the quantity of SR channels reserved for the terminal to cope with simultaneous transmission, then the terminal can reliably send both ACK/NACK and SR when needed, but resource waste occurs when a large number of terminals do not simultaneously transmit both signals
Solution Approach 1:
The patent applies universality by enabling ACK/NACK channels to serve dual purposes: they function as dedicated ACK/NACK channels when only acknowledgement is needed, and as SR channels when scheduling requests need to be transmitted. This multi-functionality allows the system to maintain reliability for simultaneous transmission while reducing the total number of dedicated SR channels needed, thereby minimizing resource waste when simultaneous transmission is not required.
Solution Approach 2:
The patent implements dynamics by allowing the functional role of channels to change based on transmission needs. The network device dynamically determines whether a terminal uses an ACK/NACK channel for acknowledgement transmission or for SR transmission based on the actual data transmission requirements. This dynamic allocation ensures that channel resources are optimized for each specific transmission scenario rather than being statically assigned.
2Reliability
If dedicated SR channels are reserved for all terminals to ensure SR transmission capability, then SR can be reliably sent, but the peak-to-average power ratio increases due to redundant channel reservations
Solution Approach 1:
The patent reduces the peak-to-average power ratio by making ACK/NACK channels universal, allowing them to serve as SR channels when needed. This eliminates the need for separate dedicated SR channel reservations for all terminals, thereby reducing redundant transmissions and lowering the peak power requirements while maintaining reliable SR transmission capability through the shared channel resource pool.
3Productivity
If the number of SR channels is reduced to minimize resource waste, then resource utilization improves, but the capability to handle simultaneous ACK/NACK and SR transmission is compromised
Solution Approach 1:
The patent resolves this contradiction by designing ACK/NACK channels with multi-functionality, enabling them to adapt to different transmission scenarios. When simultaneous transmission is needed, the terminal can use the ACK/NACK channel resources for SR transmission. This universality maintains the system's adaptability to handle simultaneous transmission while reducing the total number of dedicated SR channels, thereby improving resource utilization efficiency.
Solution Approach 2:
The patent employs dynamic channel allocation where the functional role of ACK/NACK channels changes based on transmission requirements. The network device dynamically determines whether these channels are used for acknowledgement or for scheduling requests, allowing the system to adapt to varying transmission needs and maintain versatility with fewer dedicated channels.
Data Source
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AI summary
A communication method and a communications device are provided, to properly utilize resources. The communication method includes: when a network device has configured a first channel in a first time unit for a terminal, indicating, by the network device, N second channels in the first time unit to the terminal by using a downlink control channel, where the second channel is used to send second acknowledgement information and second scheduling request information in the first time unit, a quantity of first channels is M, M+N is greater than or equal to 2×B, M is less than N, the second acknowledgement information is an element in a second acknowledgement information set, B is a quantity of elements in the second acknowledgement information set, there is a time-domain overlapping part between a time-frequency resource of the first channel and a time-frequency resource of the second channel in the first time unit, and the first channel is used to indicate first scheduling request information in the first time unit, or the first channel is used to indicate the first scheduling request information and send first acknowledgement information in the first time unit; and detecting, by the network device, the first channel and/or the second channel.