Uplink Layer Indication for 8Tx Antenna Port Mapping
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Solution Overview
Problem
Existing communication technologies in 5G NR lack a method to support uplink transmission of a maximum of eight layers using 8Tx antennas, leading to increased bit overheads for indicating antenna port associations.
Innovation Solution
A data transmission method that uses a unified bit allocation for indicating spatial layer numbers and antenna port associations, regardless of whether the layer number is 1 to 4 or 5 to 8, reducing the need for additional bit fields and maintaining consistent overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of transmit antenna ports is increased to 8 and maximum uplink spatial layer number is increased to 8, then uplink transmission throughput is improved, but bit overheads for indicating antenna port associations increase
Solution Approach 1:
The patent applies universality by designing a unified indication method that works for both 4-layer and 8-layer transmission scenarios. The same bit field structure and indication rules are used regardless of whether the terminal transmits 4 or 8 layers, eliminating the need for separate indication mechanisms and reducing overall signaling overhead while supporting enhanced throughput
Solution Approach 2:
The patent changes the interpretation parameters of existing bit fields based on terminal capability indicators. When a terminal supports 8-layer transmission, the network device interprets the indication information differently to map to 8 transmit antenna ports and 8 spatial layers, rather than changing the bit field structure itself. This allows flexible adaptation to different throughput requirements without increasing overhead
2Adaptability or versatility
If separate indication methods are designed for 4-layer and 8-layer transmission, then transmission capability is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal indication framework where the same DCI fields and indication procedures serve both 4-layer and 8-layer transmission modes. The network device and terminal use capability indicators to determine whether to apply 4-layer or 8-layer interpretation rules, eliminating the need for separate indication methodologies and reducing system complexity while maintaining full transmission capability
Solution Approach 2:
The patent introduces dynamic parameter interpretation where the meaning of indication bits changes based on terminal capability flags. The same bit fields dynamically map to different numbers of antenna ports and spatial layers depending on whether the terminal is configured for 4Tx or 8Tx operation, allowing flexible adaptation without increasing structural complexity
Data Source
AI summary
Embodiments of this application provides a data transmission method and a communication apparatus. Generating and sending first information. The first indication information indicates a first spatial layer number, a first precoding matrix corresponding to the first spatial layer number, a first antenna port set, and an association relationship between the first antenna port set and a second antenna port set. The second indication information indicates a second spatial layer number, a second precoding matrix corresponding to the second spatial layer number, a third antenna port set, and an association relationship between the third antenna port set and a fourth antenna port set.