Soft Uplink Grant Parameter Adaptation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing uplink grants, particularly in adapting transmission parameters to optimize communication quality and resource utilization, especially in scenarios where user equipment (UE) has better channel state information than the network entity.
Innovation Solution
Implementing a soft uplink grant mechanism that allows user equipment (UE) to select or modify transmission parameters, such as modulation and coding schemes, redundancy versions, and demodulation reference signals, based on its local conditions, enabling flexible resource allocation and improved communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the network entity provides all transmission parameters in the uplink grant, then the UE can reliably transmit according to network instructions, but the UE cannot adapt transmission parameters based on its local channel state information
Solution Approach 1:
The patent extracts specific transmission parameters from the traditional uplink grant structure and creates a separate parameter message. The network entity identifies which parameters the UE should modify based on its channel state information and includes only those parameters in a separate message, allowing UE adaptation without overwhelming the grant structure with all possible parameters.
Solution Approach 2:
The patent segments the transmission parameters into two groups: those provided in the standard uplink grant and those provided in a separate parameter message. This segmentation allows the UE to receive baseline parameters from the grant while obtaining additional or modified parameters from the separate message, enabling adaptation based on local conditions.
2Productivity
If the UE uses fixed transmission parameters provided by the network, then the network has full control over transmission quality, but the UE cannot optimize parameters based on real-time local conditions
Solution Approach 1:
The patent implements a feedback mechanism where the UE reports its channel state information to the network entity, and the network entity uses this feedback to determine which parameters should be made soft. The parameter message is generated based on this feedback, allowing the system to balance reliability (network control) with productivity (UE optimization) dynamically.
3Loss of energy
If the uplink grant includes all transmission parameters, then the network can ensure proper decoding at the UE, but the UE cannot modify parameters to reduce power consumption or improve performance
Solution Approach 1:
The patent enables parameter changes by allowing the UE to modify certain transmission parameters based on the soft parameters received in the parameter message. The UE can adjust parameters like modulation and coding schemes, redundancy versions, and demodulation reference signals to optimize for lower power consumption or improved performance while maintaining sufficient information for proper decoding through the parameter message.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an uplink grant that schedules a communication in a scheduled resource and that includes first transmission parameters associated with the scheduled resource. The UE may select, in response to the uplink grant being a soft uplink grant, second transmission parameters that include new transmission parameters not included in the first transmission parameters or include modified first transmission parameters. The UE may transmit the communication in the scheduled resource or a subset of the scheduled resource using at least the second transmission parameters. Numerous other aspects are described.