8Tx Uplink Reference Signals Using Segmented Antenna Port Sets
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Solution Overview
Problem
There is a need for an effective method and apparatus to support the growing number of services in wireless communication systems, particularly in 5G and beyond, including enhanced mobile broadband (eMBB), ultra-reliable low-latency communications (URLLC), and massive machine-type communications (mMTC), which require efficient use of ultra-high frequency bands and improved antenna configurations.
Innovation Solution
The method involves transmitting and receiving uplink reference signals (SRS) using codebook-based 8Tx physical uplink shared channels (PUSCH) with specific antenna port configurations, including 8 antenna ports partitioned into subsets, and supporting various combinations of antenna ports for different services, as well as configuring SRS resource sets and receiving SRS configuration information to optimize communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If 8Tx codebook-based PUSCH transmission is implemented with multiple antenna ports, then the data transmission capacity and service diversity are improved, but the device complexity and configuration difficulty increase
Solution Approach 1:
The 8 antenna ports are segmented into two codebook subsets (first codebook subset with 4 antenna ports, second codebook subset with 4 antenna ports). This segmentation allows the system to support 8Tx capability while maintaining manageable configuration complexity by dividing the antenna resources into smaller, independently configurable groups.
Solution Approach 2:
The patent implements dynamic switching between different codebook subsets based on transmission conditions. The UE and gNB can dynamically select which codebook subset to use for PUSCH transmission, allowing adaptive optimization of transmission performance while keeping the overall system complexity manageable through flexible, condition-based selection.
2Adaptability or versatility
If multiple codebook subsets are configured for different antenna port combinations, then the adaptability and service support are improved, but the configuration management and signaling overhead increase
Solution Approach 1:
The patent creates a universal configuration framework where two codebook subsets are defined with complementary antenna port combinations. Each subset can serve different service requirements (e.g., one subset optimized for certain beamforming patterns, another for different spatial configurations), providing multi-functionality while using a unified configuration management approach.
Solution Approach 2:
The system changes key parameters (codebook subset index, antenna port selection) based on transmission conditions and service requirements. By dynamically adjusting these parameters rather than maintaining fixed configurations, the system achieves high adaptability for diverse services while keeping configuration management straightforward through parameter-based control.
3Reliability
If 8 antenna ports are used for uplink transmission, then the coverage and reliability are improved, but the energy consumption and processing requirements increase
Solution Approach 1:
The system dynamically activates only the necessary antenna ports based on current transmission conditions, service requirements, and channel states. Instead of continuously using all 8 antenna ports, the UE and gNB can selectively activate subsets of antenna ports, reducing energy consumption when full 8Tx capability is not needed while maintaining reliability when conditions require it.
Solution Approach 2:
The patent enables dynamic changing of antenna port configuration parameters based on transmission needs. By adjusting the number of active antenna ports and their specific assignments according to real-time conditions, the system optimizes the balance between reliability (coverage) and energy consumption, using more antenna ports only when necessary for maintaining reliable communication.
Data Source
AI summary
The disclosure relates to a 5th-generation (5G) or 6th-generation (6G) communication system for supporting a higher data transmission rate. Provided is a method performed by a user equipment (UE), that includes transmitting, to a base station (BS), capability information regarding codebook-based 8Tx physical uplink shared channel (PUSCH), receiving, from the BS, sounding reference signal (SRS) configuration information including information of a SRS resource set, in case that a usage of the SRS resource set is identified as a codebook, based on the information of the SRS resource set, identifying that a value of nrofSRS-Ports-n8 is applied to all of a plurality of SRS resources in the SRS resource set and transmitting at least one SRS based on the value of nrofSRS-Ports-n8.