Emergency Call Resource Allocation in Wireless Networks

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Solution Overview

Problem

Conventional wireless communication systems face interference issues when performing emergency calls due to ambient base stations, which hinder direct communication between mobile stations within the same cell coverage.

Innovation Solution

A wireless communication system and method that involve an emergency call mobile station, a relay mobile station, and a serving base station, where the serving base station allocates a specific emergency call transmission resource and requests adjacent base stations not to use it, allowing the relay mobile station to facilitate communication between the emergency call mobile station and the base station without interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If ambient base stations use the same transmission resource for emergency calls, then resource utilization is improved, but inter-cell interference increases

Engineering Contradiction:

Improveresource utilizationVSAvoidinter-cell interference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the emergency call transmission resource from the common resource pool and dedicates it exclusively to emergency calls. The serving base station identifies and reserves specific time-frequency resources for emergency communications, separating them from general traffic resources to eliminate interference from ambient base stations while maintaining efficient resource utilization for emergency services.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The serving base station performs preliminary actions by proactively requesting ambient base stations to refrain from using the allocated emergency call transmission resource before the emergency communication occurs. This advance coordination ensures that the emergency resource remains interference-free when needed, resolving the contradiction between resource utilization and interference prevention.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If direct communication is performed between mobile stations, then communication efficiency is improved, but interference from other mobile stations or base stations increases

Engineering Contradiction:

Improvecommunication efficiencyVSAvoidinterference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent applies local quality by creating a localized interference-free zone around the emergency call transmission resource. The serving base station coordinates with ambient base stations to exclude them from using the specific emergency resource, thereby providing a protected communication channel for direct mobile station-to-mobile station emergency communication without general interference.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The serving base station acts as an intermediary by mediating between the mobile stations performing direct emergency communication and the ambient base stations. It coordinates resource allocation and requests ambient base stations to refrain from using the emergency resource, enabling direct communication while preventing interference from other network elements.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If a dedicated emergency call transmission resource is allocated, then emergency call reliability is improved, but resource availability for other services decreases

Engineering Contradiction:

Improveemergency call reliabilityVSAvoidresource availability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent applies partial action by allocating only the necessary portion of transmission resources for emergency calls rather than dedicating all resources. The serving base station identifies and reserves specific time-frequency resources sufficient for emergency communication needs, maintaining adequate resource availability for other services while ensuring reliable emergency call transmission through dedicated resource allocation.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS8849240B2System and method for performing emergency call in wireless communication network, and base station

Publication Date: 2014.09.30 SAMSUNG ELECTRONICS CO LTD

AI summary

A system and method for performing an emergency call is disclosed that can reduce inter-cell interference. A wireless communication system for performing an emergency call includes an emergency call mobile station for requesting the emergency call; a relay mobile station for relaying the emergency call request to a serving base station; a serving base station for receiving the emergency call request via the relay mobile station, determining an emergency call transmission resource, and requesting its ambient base stations so as not to use the determined emergency call transmission resource; and ambient base stations for preventing the use of the area of the transmission resource, to which the emergency call transmission resource is allocated.