Rate Matching Weight Correction for LTE Layer Mapping
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Solution Overview
Problem
The existing rate matching weights in LTE R8 and R9 protocols are not adaptable to the new layer mapping capabilities in LTE R10, which supports mapping of one stream to four layers, leading to inefficiencies in data transmission.
Innovation Solution
A method and apparatus for correcting rate matching weights based on layered mapping, specifically by determining the number of layers and transmission mode to adjust KMIMO and NL values, allowing for multi-layer multiplexing and diversity transmission, and incorporating filling symbols or perforating processing to ensure accurate data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the original rate matching weights (KMIMO and NL) from R8 and R9 protocols are used, then the system maintains compatibility with legacy protocols, but the weights are not adaptable to the new layer mapping capabilities in R10 which supports mapping of one stream to four layers
Solution Approach 1:
The patent implements dynamic adjustment of rate matching weights based on the actual number of layers used in transmission. The weights KMIMO and NL are no longer fixed values from R8/R9 protocols but are dynamically corrected according to the relationship between the number of layers and the mapping configuration. This allows the system to adapt to R10's four-layer mapping capability while maintaining accurate rate matching calculations.
Solution Approach 2:
The patent changes the parameters KMIMO and NL from static protocol-defined values to dynamic values that are corrected based on the actual layer mapping configuration. The correction mechanism adjusts these parameters according to the number of layers and transmission mode, enabling the system to support R10's enhanced layer mapping while maintaining compatibility with legacy protocols through conditional parameter adjustment.
2Productivity
If the system supports mapping of one stream to four layers in R10, then the layer mapping capability is enhanced, but the original rate matching weights become inadequate requiring adjustment of KMIMO and NL values
Solution Approach 1:
The patent performs preliminary correction of the rate matching weights KMIMO and NL before the actual rate matching calculation. By pre-adjusting these weights based on the number of layers and transmission mode, the system prepares the correct parameters in advance, avoiding the need for complex real-time adjustments during data transmission and simplifying the overall calculation process.
Solution Approach 2:
The patent introduces a correction mechanism that acts as an intermediary between the layer mapping configuration and the rate matching calculation. This correction layer adjusts the weights KMIMO and NL based on the relationship between the number of layers and mapping configuration, serving as a bridge that translates the enhanced R10 layer mapping capability into accurate rate matching parameters without requiring complete redesign of the rate matching algorithm.
3Ease of operation
If fixed rate matching weights are used for simplicity, then the calculation process is straightforward, but the weights cannot accommodate different layer mapping configurations in R10
Solution Approach 1:
The patent creates a universal rate matching weight correction mechanism that can handle multiple layer mapping configurations (1, 2, 3, or 4 layers) through a unified correction formula. The correction mechanism uses the relationship between the number of layers and the weight values to provide a single solution that works across all configuration types, maintaining calculation simplicity while achieving broad adaptability to R10's enhanced layer mapping capabilities.
Data Source
AI summary
The disclosure discloses a method for correcting rate matching weights based on layered mapping, includes: obtaining the number of layers to be layered mapped, determining a transmission mode for communication content; and according to the obtained number of layers and the determined transmission mode, correcting the weights for rate matching in R10. The disclosure also discloses an apparatus for correcting rate matching weights based on layered mapping, includes a weight correction unit, and a transmission mode determination unit and a layer number obtaining unit that are connected to the weight correction unit; wherein the transmission mode determination unit can determine the transmission mode for communication content and inform the weight correction unit of the transmission mode; the layer number obtaining unit can obtain the number of layers to be layered mapped and inform the weight correction unit of the number of layers; and according to the obtained number of layers and the determined transmission mode, the weight correction unit performs weights correction for rate matching. The method and the apparatus of the disclosure both can ensure that the weights for rate matching in R8 and R9 can be adaptable to the mapping manner in R10.