Downlink Control Information Bit Mapping for SRS Power Control
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Solution Overview
Problem
Existing wireless communication systems face challenges in effectively determining uplink transmission power and interpreting downlink control information (DCI) for power control in network cooperative communication systems, particularly in advanced mobile communication technologies like 5G and 6G, which require efficient power management and service provision for diverse applications.
Innovation Solution
A method and device for determining uplink transmission power by receiving and interpreting downlink control information (DCI) with a starting bit position for transmit power control (TPC) commands for sounding reference signals (SRS), using integers from 1 to 45, to facilitate accurate power control and efficient service provision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If DCI format 2_3 is extended to support network cooperative communication systems, then power control capability is improved, but device complexity increases
Solution Approach 1:
The DCI format 2_3 is segmented into multiple fields with distinct functions: TPC commands for SRS power control, SRS resource indicator fields, and other control parameters. Each field is independently decoded and processed, allowing the terminal to handle extended functionality without overwhelming complexity by breaking down the interpretation into manageable segments.
Solution Approach 2:
The patent introduces a new dimension to DCI interpretation by adding a starting bit position parameter that indicates where TPC commands begin within the extended DCI structure. This dimensional approach allows flexible configuration of power control parameters without fundamentally redesigning the entire DCI parsing mechanism, thereby managing complexity while enhancing capability.
2Measurement precision
If starting bit position for TPC commands is configured using integers from 1 to 45, then power control precision is improved, but information processing complexity increases
Solution Approach 1:
The patent changes the parameter representation by using a starting bit position indicator (integers 1-45) that directly specifies the location of TPC commands within the DCI structure. This parameter change enables precise positioning of power control fields without requiring complex encoding schemes, achieving high precision while keeping the interpretation mechanism relatively simple through direct indexing.
Data Source
AI summary
A method performed by a terminal in a wireless communication system is provided. The method includes receiving, from a base station, first information indicating a starting bit position of a block within downlink control information (DCI) for a transmission of a group of transmit power control (TPC) commands for a sounding reference signal (SRS), the first information indicating one of integers from 1 to 45, receiving, from the base station, the DCI, identifying a TPC command in the block corresponding to the starting bit position, determining a transmission power for the SRS based on the identified TPC command, and transmitting, to the base station, the SRS based on the transmission power.