Group Triggering Sounding Signal Transmission LTE PDCCH
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Solution Overview
Problem
In LTE systems, existing methods for triggering user equipment (UE) to transmit sounding signals are inefficient as they can only trigger one UE at a time on a physical downlink control channel (PDCCH), limiting the overall efficiency of uplink channel estimation.
Innovation Solution
A method that allows a base station to trigger multiple UEs in a group to transmit sounding signals simultaneously on a PDCCH by using a trigger message with instruction information, enabling efficient resource configuration and scheduling through high-layer signaling or DCI, allowing for time division, frequency domain, or sequential resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If one UE is triggered to transmit sounding signal on PDCCH, then the PDCCH can be used for triggering, but the efficiency is comparatively low
Solution Approach 1:
The patent combines multiple UE triggering operations into a single PDCCH transmission by grouping UEs and using a single DCI message with a group identifier. This merging approach allows one PDCCH to trigger multiple UEs simultaneously, directly improving productivity while managing complexity through standardized grouping mechanisms
Solution Approach 2:
The PDCCH is enhanced to serve multiple functions: it can trigger both single UE and group of UEs, and can carry different DCI formats (0, 4, 1B, 2B, 2C, 2D) for different triggering scenarios. This multi-functionality allows the same physical channel to handle diverse triggering requirements, improving efficiency without requiring separate channels for each UE
2Productivity
If multiple UEs are triggered simultaneously on PDCCH, then transmission efficiency is improved, but resource allocation complexity increases
Solution Approach 1:
The patent segments UEs into different groups based on their triggering requirements and configurations. Each group can be independently managed and triggered, allowing the system to handle multiple UEs simultaneously while maintaining manageable complexity through organized segmentation. The segmentation is implemented through group identifiers and associated DCI formats
Solution Approach 2:
The patent introduces dynamic resource allocation where UEs can be flexibly assigned to different groups and triggering modes based on current system conditions. The DCI formats support dynamic selection of triggering parameters, allowing the resource configuration to adapt to varying uplink channel estimation requirements without fixed rigid structures
3Adaptability or versatility
If DCI formats are extended to support group triggering, then triggering capability is enhanced, but control information complexity increases
Solution Approach 1:
Existing DCI formats (0, 4, 1B, 2B, 2C, 2D) are enhanced to support both single UE and group triggering through the addition of group identifier fields and modified triggering conditions. This allows the same DCI formats to serve multiple purposes, enhancing adaptability while avoiding the need to create entirely new complex formats
Solution Approach 2:
The patent modifies DCI parameters by adding group identifier fields and adjusting triggering parameters (such as n0, n1, n2 offsets) to support group-based triggering. These parameter changes enable enhanced triggering capability while maintaining compatibility with existing DCI structures, managing complexity through systematic parameter extension rather than structural overhaul
Data Source
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AI summary
Embodiments of the present invention provide a method for transmitting a sounding signal, a base station and a user equipment, including: receiving a trigger message transmitted by a base station, where the trigger message comprises instruction information, the instruction information is used for instructing at least one UE in a group of user equipments UEs to transmit a sounding signal, and the group of user equipments comprises at least two user equipments; and transmitting the sounding signal to the base station according to the instruction information. According to the method for transmitting the sounding signal, the base station and the user equipment provided by embodiments of the present invention, an eNodeB may trigger at least one UE in a group of UEs to transmit a sounding signal according to a certain rule on a PDCCH, thereby improving efficiency.