UE UL Grant Selection for 5G Scheduling Efficiency
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Solution Overview
Problem
Current wireless communication systems, such as 5G NR, face inefficiencies in uplink (UL) scheduling due to the need for network nodes to acquire full UL channel state information (CSI), which can lead to reduced network throughput and power efficiency due to increased resource overhead and outdated CSI.
Innovation Solution
Allowing user equipment (UE) to select a subset of UL scheduling information or parameters, rather than receiving the full set from the network, based on its local understanding of channel conditions, to reduce network overhead and improve communication accuracy and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the network node acquires full UL channel state information (CSI) through periodic reports, then the scheduling accuracy is improved, but the network overhead increases and power efficiency decreases
Solution Approach 1:
The patent extracts only the essential scheduling parameters needed for uplink transmission from the complete CSI report. The UE determines a subset of UL scheduling information including modulation and coding scheme (MCS), resource allocation, and transmit power based on local channel measurements, transmitting only these extracted parameters to the network node rather than full CSI, thereby reducing overhead and energy consumption while maintaining scheduling accuracy
Solution Approach 2:
The patent inverts the traditional scheduling approach by enabling the UE to autonomously determine UL scheduling information based on local channel conditions rather than relying solely on network-node-centric scheduling. The UE independently selects MCS, resource allocation, and power parameters, then reports only the determined scheduling parameters to the network node for approval, fundamentally reversing who performs the complex CSI processing
2Reliability
If the network node requests periodic UL CSI reports, then the scheduling reliability is improved, but the resource overhead increases
Solution Approach 1:
The patent extracts and reports only the essential scheduling parameters (MCS, resource allocation, power settings) that the UE autonomously determines from local channel measurements, rather than transmitting complete CSI reports. This extraction approach maintains scheduling reliability by ensuring the network node receives necessary control information while significantly reducing the quantity of transmitted data and associated resource overhead
Solution Approach 2:
The patent applies partial action by having the UE determine and report only the subset of scheduling parameters that are most critical for reliable uplink transmission, rather than reporting all possible CSI parameters. The UE focuses on providing partial but sufficient information (MCS, resource allocation, power) needed for effective scheduling, reducing overall reporting burden
3Adaptability or versatility
If the UE autonomously selects UL scheduling parameters, then the adaptability to changing conditions is improved, but the device complexity increases
Solution Approach 1:
The patent segments the complex UL scheduling determination process into distinct, manageable components that the UE can handle independently: channel measurement, MCS selection based on measured quality, resource allocation determination, and power setting. By dividing the overall scheduling task into these segmented functional blocks, the UE achieves high adaptability to changing channel conditions while keeping implementation complexity manageable through modular processing
Solution Approach 2:
The patent enables the UE to serve itself by autonomously performing channel measurements and determining appropriate UL scheduling parameters (MCS, resource allocation, power) based on local conditions without requiring continuous network node intervention. The UE independently adapts to channel changes and reports only the determined parameters to the network node, achieving high adaptability while the standardized self-service algorithm keeps complexity manageable
Data Source
AI summary
A network node may transmit an UL grant to a UE, the UL grant including a first subset of UL scheduling information among a plurality of UL scheduling information associated with a PUSCH. The UE may select a second subset of UL scheduling information of the plurality of UL scheduling information other than the first subset of UL scheduling information, and transmit the PUSCH to the network node based on the first subset of UL scheduling information and the second subset of UL scheduling information of the plurality of UL scheduling information.