Adaptive IDMA Interleaver Allocation for Uplink Interference Control

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Solution Overview

Problem

Current IDMA systems face challenges in further improving performance, particularly in maintaining favorable correlation characteristics between interleaver patterns, leading to interference issues in uplink communication and limited flexibility in 5G radio access technologies.

Innovation Solution

A communication control apparatus that allocates specific interleaver types and patterns to radio communication apparatuses in IDMA systems, using a control unit to manage interleaver allocation based on attribute information and communication states, thereby reducing interference and enhancing flexibility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional IDMA systems use fixed interleaver patterns, then implementation is simple, but interference between users cannot be effectively eliminated and performance improvement is limited

Engineering Contradiction:

Improveinterference elimination capabilityVSAvoidinterleaver design complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies dynamics by making the interleaver configuration adaptive rather than fixed. The interleaver type and pattern are dynamically selected based on communication conditions, user attributes, and interference states. This allows the system to optimize interference elimination performance while managing complexity through conditional selection rather than exhaustive design.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes parameters by introducing multiple interleaver types (first type with first pattern, second type with second pattern) and selectively applying them based on communication conditions. The system varies interleaver parameters such as pattern selection and type configuration to adapt to different scenarios, thereby improving interference elimination without requiring a completely new complex design.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If IDMA systems allocate the same interleaver type to all radio communication apparatuses, then device complexity is reduced, but flexibility for 5G radio access technologies is limited

Engineering Contradiction:

Improveflexibility in 5G radio accessVSAvoidinterleaver allocation management

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the interleaver allocation by dividing radio communication apparatuses into different groups based on their attributes (e.g., uplink vs. downlink, different user types). Each segment receives appropriate interleaver types and patterns tailored to its specific requirements. This segmentation enables flexible adaptation to 5G diverse scenarios while managing complexity through structured group-based allocation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by assigning different interleaver configurations to different apparatuses or groups based on their local characteristics and communication conditions. Instead of a uniform allocation, each apparatus receives interleaver parameters optimized for its specific context, thereby achieving 5G flexibility while keeping management complexity localized rather than system-wide.

Inventive Principle:

Principle #3Local quality

3Object-affected harmful factors

If interleaver patterns have poor correlation characteristics, then device complexity is reduced, but inter-cell interference increases

Engineering Contradiction:

Improveinter-cell interferenceVSAvoidinterleaver pattern design

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent converts the potential harm of interference into benefit by using correlation characteristics of interleaver patterns strategically. By selecting patterns with appropriate correlation properties, the system can actually utilize the correlation to identify and manage interference sources, thereby reducing inter-cell interference while maintaining manageable pattern design complexity through intelligent selection rather than complex design.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS10567104B2Communication control apparatus, radio communication apparatus, communication control method, and radio communication method

Publication Date: 2020.02.18 SONY GROUP CORP

AI summary

In order provide a communication control apparatus, a radio communication apparatus, a communication control method, a radio communication method, and a program that are capable of contributing to improving a radio communication technology related to IDMA, a communication control apparatus is provided. The communication control apparatus includes a communication unit configured to communicate with a radio communication apparatus of a radio communication system using interleave division multiple access (IDMA); and a control unit configured to allocate an interleaver type of an interleaver to be used for IDMA by the radio communication apparatus.