Uplink Layer Mapping Across Partially Coherent Antenna Groups
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately and efficiently transmitting and receiving wireless signals, particularly in environments with multiple users and diverse communication needs.
Innovation Solution
The method involves configuring multiple antenna groups based on partially coherent antennas, using downlink control information (DCI) to map layers and transmit uplink signals, with antenna group-specific information and layer split combinations to optimize precoding codebooks, allowing for efficient signal transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If antenna groups are configured based on partially coherent antennas with separate antenna group-specific information, then transmission accuracy is improved, but device complexity increases
Solution Approach 1:
The patent divides the antenna system into multiple antenna groups based on partially coherent antenna relationships. Each antenna group is assigned separate antenna group-specific information including transmission rank indicator (TRI) and transmission precoding matrix index (TPMI). This segmentation allows independent optimization of each group while managing overall system complexity through structured division.
Solution Approach 2:
The patent applies local quality by providing separate antenna group-specific information for each antenna group rather than uniform configuration. The DCI includes first TPMI information for a first antenna group within a first precoding codebook and second TPMI information for a second antenna group within a second precoding codebook, allowing each group to have optimized parameters suited to its specific characteristics.
2Adaptability or versatility
If layer split combinations are used to map layers to antenna groups, then adaptability is improved, but information overhead increases
Solution Approach 1:
The patent implements dynamic layer mapping by introducing layer split combinations that can be flexibly configured. The DCI includes information regarding layer split combinations that indicate how layers are split and assigned to different antenna groups. This allows the system to adapt layer mapping configurations dynamically based on channel conditions and transmission requirements, with the first layer split combination indicating whether layers are sequentially split or split in reverse order.
3Productivity
If precoding codebooks are optimized for each antenna group, then transmission efficiency is improved, but processing complexity increases
Solution Approach 1:
The patent segments the precoding codebook into multiple codebooks, with each antenna group assigned a specific precoding codebook. The DCI includes first TPMI information providing a TPMI for a first antenna group within a first precoding codebook and second TPMI information providing a TPMI for a second antenna group within a second precoding codebook. This segmentation enables independent optimization of precoding for each antenna group, improving transmission efficiency while managing processing complexity through structured division.
4Reliability
If multiple antenna groups are configured with separate control information, then reliability is improved, but DCI size increases
Solution Approach 1:
The patent segments control information into antenna group-specific components, with the DCI including separate first TPMI information and second TPMI information for different antenna groups. This segmentation improves reliability by allowing independent control of each antenna group's transmission parameters, ensuring that failures or optimizations in one group do not affect others, while the structured segmentation helps manage DCI size through organized information distribution.
Data Source
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AI summary
A method by which a terminal transmits a signal in a wireless communication system, according to at least one from among embodiments disclosed in the present specification, comprises: receiving downlink control information (DCI) for uplink scheduling; mapping, on the basis of the DCI, each layer of an uplink to at least one from among partially coherent antennas of the terminal; and transmitting an uplink signal on the basis of the mapping of each layer, wherein a plurality of antenna groups are configured on the basis of the partially coherent antennas, the DCI includes antenna-group-specific information provided individually for each antenna group, and the size of each antenna-group-specific information can be related to, from among a plurality of layer split combinations for splitting layers for the plurality of antenna groups, the layer split combination in which a precoding codebook having the largest size is used.