IDMA Interleaving Using Partial Sequences for Flexible Transmission
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Solution Overview
Problem
Existing interleavers in IDMA systems, such as random interleavers (RI), pseudo-random interleavers (PRI), power interleavers (PI), helical interleavers (HI), deterministic interleavers (DI), and linear congruential interleavers (LCI), increase the burden on terminal apparatuses and systems, and reduce flexibility in data transmission.
Innovation Solution
The proposed apparatus includes an acquisition unit that acquires an information block generated from transmission data for a user and subjected to error correction coding, and an interleaving unit that interleaves a bit sequence of the information block using an interleaver unique to the user. The interleaving unit interleaves each of two or more partial sequences obtained from the bit sequence, allowing for flexible data transmission without the need to transmit and receive interleavers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing interleavers (RI, PRI, PI, HI, DI, LCI) are used in IDMA systems, then data transmission can be performed, but the burden on terminal apparatuses and systems increases and flexibility in data transmission is reduced
Solution Approach 1:
The patent extracts and removes the interleaver transmission requirement from the system. Instead of transmitting interleavers between transmitter and receiver as in conventional systems, the invention enables each terminal to independently generate interleavers using a deterministic algorithm based on cell ID and user ID, thereby eliminating the burden of interleaver management and transmission while maintaining flexibility
Solution Approach 2:
The patent implements self-service by enabling each terminal apparatus to autonomously generate its own interleaver without external assistance. The deterministic interleaver generation algorithm uses locally available identifiers (cell ID and user ID) to create unique interleavers, eliminating the need for system-wide interleaver coordination and reducing overall system complexity
2Quantity of substance
If random interleavers (RI) are used, then data transmission is possible, but large memory is necessary in the transmitter and additional radio resources are required to transmit the interleaver
Solution Approach 1:
The patent removes the interleaver data from the transmission stream entirely. Instead of transmitting interleaver sequences as done with random interleavers, the invention extracts this information and replaces it with compact identifier-based generation, eliminating the need for large memory buffers and additional radio resource allocation for interleaver transmission
Solution Approach 2:
The patent changes the fundamental parameter of interleaver representation from transmitted data sequences to compact generation algorithms based on cell ID and user ID. This parameter transformation reduces the quantity of data that needs to be stored and transmitted while maintaining the essential functionality of unique interleaver generation for each user
Data Source
AI summary
Provided is an apparatus including an acquisition unit that acquires an information block generated from transmission data for a user and subjected to error correction coding, and an interleaving unit that interleaves a bit sequence of the information block using an interleaver unique to the user. The interleaving unit interleaves the bit sequence by interleaving each of two or more partial sequences obtained from the bit sequence.