Wireless Device Weight Information Transmission
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Solution Overview
Problem
The high calculation load in user equipment (UE) for determining transmission weights V1 and V2 is a concern due to their complexity, which affects the efficiency of wireless communication systems.
Innovation Solution
A wireless communication device and method that includes a communication unit transmitting a reference signal with weights determined by first and second multiplication units, reducing the calculation load by managing resources and allocating them efficiently for transmitting reference signals and data, allowing for MU-MIMO and SU-MIMO schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If transmission weights V1 and V2 are determined in UE based on channel matrix calculation, then optimal transmission weights for MU-MIMO can be achieved, but calculation load in UE becomes excessively high
Solution Approach 1:
The patent extracts the complex calculation task from UE and relocates it to the base station. The base station transmits reference signals with different weights, and UE simply measures and reports channel quality indicators without performing complex matrix calculations. This extraction principle resolves the contradiction by maintaining measurement precision while dramatically reducing UE calculation load.
Solution Approach 2:
The patent introduces reference signals as an intermediary mechanism. Instead of UE directly calculating transmission weights from channel matrices, the base station uses reference signals with pre-applied weights as intermediaries to convey channel information. UE measures these intermediary signals and derives channel quality indicators, avoiding direct complex weight determination calculations.
2Measurement precision
If multiple reference signals are transmitted for weight determination, then accurate channel information can be obtained, but resource consumption increases
Solution Approach 1:
The patent makes reference signals multi-functional by designing them to serve dual purposes: channel estimation and transmission weight determination. The same reference signals are used for both functions, eliminating the need for separate dedicated signals for each purpose. This universality principle resolves the contradiction by maintaining measurement precision while reducing overall resource consumption through functional consolidation.
Data Source
AI summary
An electronic device including circuitry configured to control receiving a first reference signal or a second reference signal. The second reference signal is formed by weighting the first reference signal. The circuitry is configured to determine first transmission weight information and second transmission weight information based on reception of the first reference signal and the second reference signal. The circuitry is further configured to control transmitting of the first transmission weight information according to a first period and the second transmission weight information according to a second period, the first period being different from the second period. The second transmission weight information is determined and transmitted after the first transmission weight information is transmitted.