Segmented MAP Message Region for Wireless Interference Reduction

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Solution Overview

Problem

In broadband wireless communication systems with multiple cells/sectors, existing methods face challenges in ensuring that mobile stations can reliably receive MAP messages while minimizing interference from adjacent cells/sectors, leading to reduced coverage and increased errors in message reception.

Innovation Solution

The system segments the common MAP message region into sub-MAP message regions for each cell/sector, allocates specific MAP messages to these segmented regions, and adjusts the Modulation and Coding Scheme (MCS) levels to reduce interference, allowing for stable message reception and increased coverage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the MAP message is broadcasted through the common MAP message region of multiple cells/sectors, then all MSs can receive the MAP message, but interference by multiple cells/sectors occurs at the MAP message

Engineering Contradiction:

Improvecoverage of MAP message receptionVSAvoidinterference at MAP message

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The common MAP message region is divided into cell-specific or sector-specific sub-regions. Each sub-region carries MAP messages for a specific cell or sector, allowing MSs to receive MAP messages without interference from adjacent cells/sectors while maintaining coverage across the network

Inventive Principle:

Principle #1Segmentation

2Reliability

If the most robust MCS level (QPSK 1/2×6) is applied in the MAP message region, then all MSs can normally receive the MAP message, but interference by MAP message of adjacent cells/sectors is increased

Engineering Contradiction:

ImproveMAP message reception reliabilityVSAvoidinterference by MAP message

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

By segmenting the MAP message region into cell-specific sub-regions, the patent enables the use of lower, less robust MCS levels for each individual cell's MAP messages. This reduces the transmission power and interference generated by MAP messages while maintaining reliable reception within each cell boundary

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different MCS levels can be applied to different cell-specific MAP message regions based on local channel conditions. This allows optimization of transmission reliability for each cell without unnecessarily increasing interference across the entire network

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS9014086B2Apparatus and method for allocating resources in a broadband wireless communication system

Publication Date: 2015.04.21 WIRELESS ALLIANCE LLC

AI summary

The present invention relates to an apparatus and method for allocating a MAP message region in a broadband wireless communication system having a multi-cell/-sector structure. The present invention allocates a common MAP message region for multiple cells/sectors and a data region, divides the common MAP message region into MAP message sections for each of the cells or each of the sectors, allocates MAP messages corresponding to each of the cells or each of the sectors to the divided MAP message sections and allocates data to be transmitted to each MS to the data region, and broadcasts multiple frames containing MAP message regions for each of the cells or for each of the sectors and the data region.