Multi-Cell SRS Resource Mapping via DCI Bit Association
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently determining SRS resources when multi-cell or multi-carrier scheduling is applied, particularly in 5G and beyond systems, which affect the performance of services like eMBB, URLLC, and mMTC.
Innovation Solution
A method and device for determining SRS resources through higher layer signaling and downlink control information (DCI) with a specific SRS request field, allowing for efficient mapping and transmission of SRS across multiple cells, utilizing a 4-bit field with distinct bit associations for different cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-cell or multi-carrier scheduling is applied, then service performance for eMBB, URLLC, and mMTC is improved, but the complexity of determining SRS resources increases
Solution Approach 1:
The SRS resource determination is segmented by associating different bits of the SRS request field with different cells or carriers. Each bit or bit combination corresponds to a specific cell/carrier, allowing independent SRS resource identification for each cell without requiring complex joint determination across all cells.
Solution Approach 2:
The patent introduces a new dimension for SRS resource identification by using a 4-bit SRS request field where different bit positions represent different cells. This dimensional approach to resource allocation simplifies the determination process compared to traditional methods that would require complex calculations across multiple cells.
2Productivity
If a 4-bit SRS request field is used with distinct bit associations for different cells, then SRS resource mapping efficiency is improved, but the device complexity for processing the SRS request increases
Solution Approach 1:
The 4-bit SRS request field is segmented such that each bit or bit combination is associated with a specific cell. This segmentation allows the UE to efficiently determine SRS resources by simply checking which bits are set, rather than performing complex mapping calculations, thereby improving mapping efficiency while keeping processing complexity manageable.
Solution Approach 2:
The SRS request field structure is designed to be self-descriptive, where the bit patterns directly indicate which cells require SRS transmission. The UE can autonomously determine the SRS resources by interpreting the bit associations without requiring additional signaling or complex base station coordination, reducing processing complexity.
Data Source
AI summary
The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a terminal in a communication system may comprise: receiving information on sounding reference signal (SRS) resource configuration through higher layer signaling; receiving downlink control information (DCI) for scheduling a plurality of cells, wherein the DCI includes an SRS request field; identifying a plurality of SRS resources for the plurality of cells on the basis of the information on the SRS resource configuration and a code point of the SRS request field; and transmitting an SRS for the plurality of cells on the basis of the plurality of SRS resources.