Uplink Grant Prioritization for Reliable Control Information Transmission
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Solution Overview
Problem
Existing wireless communication systems lack a solution for selecting an appropriate uplink grant when multiple grants are available for transmitting uplink control information, leading to potential dropping or delaying of this information and inefficient power usage.
Innovation Solution
A prioritization policy is applied by the terminal device to determine the prioritization of multiple uplink grants for transmitting uplink control information, allowing selection of an optimal grant based on factors such as RNTI, data priority, frequency band, and availability, thereby improving the probability of successful transmission and power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple uplink grants are available for transmitting uplink control information, then the terminal device has more resource options, but it becomes difficult to select the appropriate grant leading to potential dropping or delaying of control information
Solution Approach 1:
The patent applies parameter changes by establishing a prioritization policy that changes the selection criteria based on multiple parameters including RNTI type, data priority, frequency band, and grant availability. This systematic parameter-based approach transforms the random or arbitrary selection process into a deterministic selection process, resolving the contradiction between having multiple resource options and ensuring reliable transmission.
2Adaptability or versatility
If multiple uplink grants are available, then resource flexibility increases, but power efficiency decreases due to uncertainty in grant selection
Solution Approach 1:
The patent resolves the power efficiency issue by changing the selection parameters to include power efficiency considerations. The prioritization policy evaluates grants based on factors that correlate with power consumption, allowing the terminal device to select grants that optimize power usage while maintaining resource flexibility. This eliminates the need for multiple trial transmissions, thereby improving power efficiency.
3Device complexity
If no prioritization policy is applied, then the system remains simple, but uplink control information may be dropped or delayed
Solution Approach 1:
The patent introduces a prioritization policy that changes the selection behavior from random to systematic based on multiple parameters. This policy ensures that uplink control information is transmitted on the most appropriate grant, minimizing the probability of dropping or delaying. The added complexity is minimal and focused solely on the selection logic, while the benefit of reduced information loss is significant.
Data Source
AI summary
Example embodiments relate to communication of uplink control information. A method implemented at a terminal device comprises obtaining a plurality of uplink grants available for uplink transmission to a network device, the plurality of uplink grants indicating resources for the uplink transmission; determining prioritization of the plurality of uplink grants in transmission of uplink control information based on a predetermined prioritization policy; and selecting, based on the determined prioritization, an uplink grant from the plurality of uplink grants for transmission of the uplink control information to the network device. In such a way, it is possible to increase a probability of transmission of the uplink control information and/or a probability of improving power efficiency of the terminal device.