Uplink Grant LCG Indicator for Precise Resource Allocation
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Solution Overview
Problem
Current wireless communication systems, such as LTE, face challenges in efficiently managing uplink grants for logical channel groups, leading to inefficiencies in resource allocation and data transmission, as existing mechanisms cannot guarantee that the received uplink grant is used specifically for a specific logical channel group.
Innovation Solution
A method and device for a user equipment (UE) to receive a first uplink grant and a logical channel group (LCG) indicator, generating a Medium Access Control Protocol Data Unit (MAC PDU) containing data only for the indicated LCG, and transmitting it using the uplink grant, with the grant and indicator received through Downlink Control Information (DCI) or downlink MAC PDU, allowing for fine control of resource allocation within specific logical channel groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a general uplink grant mechanism is used without LCG-specific indication, then the system complexity is reduced and ease of operation is improved, but resource allocation precision deteriorates and data transmission efficiency is reduced
Solution Approach 1:
The patent segments the uplink grant mechanism by introducing LCG-specific indicators that divide the general uplink grant into logical channel group-specific grants. This allows the system to maintain a simple overall structure while enabling precise control over specific logical channel groups through segmented indication fields in the DCI format.
Solution Approach 2:
The patent applies local quality by adding LCG indicator fields specifically where needed in the DCI format, rather than redesigning the entire grant mechanism. This enables precise resource allocation for specific LCGs while keeping the rest of the system operationally simple and unchanged.
2Manufacturing precision
If LCG-specific indicators are added to DCI format, then resource allocation precision is improved and data transmission efficiency is enhanced, but device complexity increases
Solution Approach 1:
The patent extracts the LCG indication functionality as a separate, dedicated field within the DCI format. By taking out the LCG-specific indication as an independent element rather than embedding it throughout the entire DCI structure, the patent adds precision functionality while minimizing the increase in overall device complexity.
Solution Approach 2:
The patent designs the LCG indicator field to serve multiple purposes: it can indicate specific LCGs for targeted resource allocation, it can work with existing uplink grant structures, and it can be adapted to different DCI formats. This multi-functionality reduces the need for separate mechanisms for each function, thereby limiting complexity growth.
3Adaptability or versatility
If uplink grants are allocated for all logical channel groups, then resource allocation coverage is improved, but resource waste increases due to inability to target specific LCGs
Solution Approach 1:
The patent introduces dynamic LCG-specific indication in the DCI format that allows the system to adaptively target specific logical channel groups based on current transmission needs. This dynamic indication mechanism enables the system to switch between targeting specific LCGs or using general grants, thereby improving resource utilization while maintaining allocation coverage.
Solution Approach 2:
The patent changes the parameter of uplink grant indication from a general, non-specific format to one that includes LCG-specific indicator fields. This parameter change allows the same uplink grant mechanism to serve both broad coverage needs and specific LCG-targeting needs, reducing resource waste while maintaining adaptability.
Data Source
AI summary
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for transmitting, by a user equipment (UE), data in a wireless communication system, the method comprising: receiving a first uplink grant for a logical channel group (LCG) and a first LCG indicator of the LCG; generating a Medium Access Control Protocol Data Unit (MAC PDU) containing a data of only the LCG indicated by the first LCG indicator; and transmitting the MAC PDU using the first uplink grant.