Codeword-to-Layer Mapping Capability Reporting in MIMO Systems
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Solution Overview
Problem
In MIMO systems, there is a need to understand the terminal's capability for supporting different codeword-to-layer mapping schemes to flexibly configure transmission layers, as existing methods lack flexibility in managing the number of transmission layers.
Innovation Solution
A method and device for reporting and receiving codeword-to-layer mapping that allows terminals to report their capability for supporting type 2 layer mapping schemes, enabling flexible configuration of transmission layers by allowing a maximum difference in the number of layers between codewords to vary from zero to six, enhancing flexibility in layer mapping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If type 1 layer mapping scheme is used, then the number of transmission layers is limited with maximum difference of 1 between codewords, but the flexibility in configuring transmission layers is reduced
Solution Approach 1:
The patent introduces a dynamic layer mapping mechanism that allows the mapping relationship between codewords and transmission layers to be flexibly configured based on terminal capability. The network device can dynamically select between type 1 and type 2 mapping schemes, and the terminal can dynamically report its supported mapping types, enabling adaptive configuration of transmission layer differences between 0-1 (type 1) or 0-6 (type 2) based on actual system conditions.
Solution Approach 2:
The patent changes the parameter of maximum layer difference between codewords from a fixed value of 1 in type 1 mapping to variable values of 0-6 in type 2 mapping. This parameter change is achieved through capability information exchange between terminal and network device, where the terminal reports its supported mapping types, and the network device configures the appropriate mapping scheme accordingly, enabling flexible adjustment of the layer difference parameter.
2Adaptability or versatility
If type 2 layer mapping scheme is enabled, then the maximum difference in transmission layers between codewords increases to 6, but the system complexity increases
Solution Approach 1:
The patent applies preliminary action by having the terminal report its capability information about supported layer mapping types before actual data transmission occurs. The network device receives this capability information and pre-configures the appropriate mapping scheme (type 1 or type 2) based on the terminal's capabilities, avoiding the need for complex real-time decisions during transmission and reducing overall system complexity.
Solution Approach 2:
The patent implements feedback through the capability information reporting mechanism, where the terminal provides feedback about its supported mapping types to the network device. This feedback loop enables the network device to select the most suitable mapping scheme (type 1 with difference 0-1 or type 2 with difference 0-6) based on terminal capability, optimizing the balance between flexibility and system complexity.
3Productivity
If fixed layer mapping configuration is used, then the system is simpler to manage, but the ability to meet diverse transmission requirements is limited
Solution Approach 1:
The patent achieves universality by designing a capability-based configuration system that can adapt to multiple transmission scenarios. The terminal reports its capability information, and the network device uses this information to configure appropriate mapping schemes for different transmission requirements. This universal mechanism allows the system to handle diverse transmission needs (different numbers of codewords, different layer configurations) through a single capability reporting and configuration framework, rather than requiring separate fixed configurations for each scenario.
Data Source
AI summary
A method, device and computer readable medium for reporting codeword-to-layer mapping. The reporting codeword-to-layer mapping is performed by: reporting capability information of the terminal, where the capability information is configured to determine support for enabling a type 2 layer mapping scheme; where a maximum difference in a number of transmission layers after two codewords are subjected to layer mapping is different respectively for a type 1 mapping scheme and the type 2 layer mapping scheme.