Beam Forming Transmission in LTE DwPTS Field
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Solution Overview
Problem
The current LTE system does not define the mapping pattern of UE-specific reference signals for beam forming transmission in the Special Field DwPTS, limiting the performance of beam forming in this critical downlink transmission component.
Innovation Solution
A method and system for beam forming transmission in the DwPTS Field, where the eNB maps downlink data and UE-specific reference signals according to a preset mapping structure, performing beam forming and resource mapping to form DwPTS Field data, ensuring compatibility with existing systems by transmitting control signaling and primary synchronization signals in specific OFDM symbols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If beam forming transmission is performed in the Special Field DwPTS, then transmission efficiency is improved, but the system lacks defined mapping patterns for UE-specific reference signals
Solution Approach 1:
The patent applies universality by making the existing UE-specific reference signal mapping structure applicable to both normal downlink subframes and the special DwPTS field. The same mapping principles and structures used in regular subframes are universally applied to DwPTS, eliminating the need for separate definitions and enabling beam forming transmission efficiency in the special field without increasing system complexity.
2Reliability
If UE-specific reference signals are mapped in DwPTS for beam forming, then beam forming performance is improved, but compatibility with existing LTE systems may be compromised
Solution Approach 1:
The patent applies local quality by making targeted, localized adjustments to the mapping structure specifically for the DwPTS field while preserving the overall LTE framework. The solution modifies only the necessary local aspects of reference signal mapping in DwPTS (such as positioning relative to control signaling and synchronization signals) while maintaining compatibility with existing LTE systems through standardized interfaces and procedures.
Solution Approach 2:
The patent applies preliminary action by pre-defining the mapping structure for UE-specific reference signals in DwPTS before actual beam forming transmission occurs. The mapping pattern is established in advance based on the number of OFDM symbols in DwPTS and the positions of control signaling and synchronization signals, ensuring both beam forming performance and system compatibility are guaranteed before transmission begins.
3Stability of the object's composition
If control signaling and synchronization signals are transmitted in specific OFDM symbols, then system stability is maintained, but flexibility in resource allocation is reduced
Solution Approach 1:
The patent applies dynamics by making the reference signal mapping adaptive to different DwPTS configurations. The mapping structure dynamically adjusts based on the number of OFDM symbols in DwPTS and the specific positions of control signaling and synchronization signals. This dynamic adaptation allows the system to maintain stability through standardized signal positions while achieving flexibility in resource allocation across different DwPTS lengths and configurations.
Data Source
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Figure 3A~3C
AI summary
A method for beam forming transmission is disclosed. The method includes: the eNB mapping the downlink data of the user and the UE-specific reference signals carried in the DwPTS Field for beam forming transmission according to the preset mapping structure, and performing the beam forming process; the eNB performing the resource mapping on results of the beam forming process result, primary synchronization signal, control signaling, Cell specific reference signal and other user data to form the DwPTS Field data; and the eNB sending the DwPTS Field data to the UE. A system and a corresponding device for beam forming transmission are further disclosed.