LTE IDMA Interleaver Determination via Binding Parameters
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Solution Overview
Problem
In Long Term Evolution (LTE) systems using Interleave Division Multiple Access (IDMA) multiplexing access technology, there is no effective method for User Equipment (UE) and eNodeB to determine the interleaver used by the other party during data transmission, leading to difficulties in de-interleaving data correctly.
Innovation Solution
A method and device that determine an interleaver identifier based on a binding parameter and a preset association relationship, allowing UE and eNodeB to perform interleaving and de-interleaving processing using the corresponding interleaver, ensuring accurate identification and processing of data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If IDMA multiplexing access technology is introduced to LTE system, then multi-access interference immunity performance is improved, but the complexity of determining interleaver identification is worsened
Solution Approach 1:
The patent applies preliminary action by pre-configuring binding parameters (such as user identifiers, time information, and interleaver set quantities) before data transmission. These binding parameters are established in advance through system information broadcasting or RRC signaling, allowing both UE and eNodeB to independently determine the same interleaver identifier without complex real-time negotiation, thus resolving the technical contradiction between improved reliability and reduced determination complexity.
2Adaptability or versatility
If interleaver is used to distinguish users in IDMA system, then user differentiation capability is improved, but the difficulty of learning interleaver identifier between UE and eNodeB is worsened
Solution Approach 1:
The patent implements feedback mechanisms where the eNodeB broadcasts system information containing binding parameters (such as SIB19 for uplink IDMA or SIB20 for downlink IDMA) that enable UEs to determine interleaver identifiers. This feedback loop ensures both parties can independently arrive at the same interleaver identification through deterministic calculations based on shared binding parameters, resolving the difficulty of interleaver identifier learning while maintaining user differentiation capability.
3Measurement precision
If binding parameters are used to determine interleaver identifier, then interleaver determination accuracy is improved, but the quantity of information to be processed is worsened
Solution Approach 1:
The patent extracts only the essential binding parameters needed for interleaver determination from the complete system information. Specifically, it identifies and extracts key parameters such as user identifiers, time information, and interleaver set quantities, while eliminating redundant information. This selective extraction maintains high determination accuracy by preserving critical parameters while reducing the overall information processing burden on both UE and eNodeB.
Data Source
AI summary
The present invention discloses a method for determining an interleaver, including: determining an interleaver identifier according to a binding parameter and a preset association relationship between the interleaver identifier and the binding parameter; performing interleaving processing on to-be-sent data by using an interleaver corresponding to the interleaver identifier; and performing de-interleaving processing on received data by using the interleaver corresponding to the interleaver identifier. An embodiment of the present invention further provides a corresponding device. According to technical solutions of the present invention, during data transmission, a UE and an eNodeB can accurately learn an interleaver that is used by the other party, thereby de-interleaving data correctly.