KR20160150563A

KR20160150563A - Method of managing resources of public safety network

Info

Publication number: KR20160150563A
Application number: KR1020150110661A
Authority: KR
Inventors: 이상훈; 김현우; 최용훈; 윤현구; 정찬형
Original assignee: 광운대학교 산학협력단; (특수법인)한국전파진흥협회; 명지전문대학산학협력단
Priority date: 2015-06-22
Filing date: 2015-08-05
Publication date: 2016-12-30

Abstract

Disclosed are a resource management method of a disaster communication network and a device thereof. The resource management device comprises the following steps of: calculating importance of at least one user terminal in a predetermined region by using at least one of a class of a user, activity content, and a distance from a disaster occurrence region; calculating a priority of each user terminal based on the importance of the user terminal and a resource requirement amount; and sequentially allocating resources to the user terminal within the range of a resource capacity of a base station based on the priority.

Description

TECHNICAL FIELD The present invention relates to a method of managing resources of a disaster communication network,

The present invention relates to a method and apparatus for managing resources of a disaster communication network, and more particularly, to a method and apparatus for allocating resources efficiently to respective terminals located in a disaster communication network to enable communication.

For public disaster safety communication, 3GPP Release-13 is standardizing on Mission Critical Push-to-Talk (MCPTT) and Isolated E-UTRAN Operation mode. However, it does not disclose a technique for allocating a differential resource (e.g., bandwidth) to lower-order terminals having different roles.

Patent Publication No. 2013-0078889

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and apparatus for efficiently allocating resources such as bandwidth to lower-level terminals of a disaster communication network.

According to another aspect of the present invention, there is provided a method for managing a resource of a disaster communication network, the method comprising: determining at least one of a class, an activity content, Calculating an importance of at least one user terminal in the area; Determining a resource requirement of the at least one user terminal; Calculating a priority of the at least one user terminal based on the importance and the resource requirement; And allocating resources to the user terminal sequentially in the range of the resource capacity of the base station based on the priority.

According to an aspect of the present invention, there is provided a resource management apparatus for managing at least one user terminal in a predetermined area using at least one of a class, an activity content, An importance calculating unit for calculating an importance calculating unit; A priority calculation unit for calculating a priority of the at least one user terminal based on the importance of the user terminal and the resource requirement of the user terminal; And a resource allocation unit for allocating resources to the user terminals sequentially in the range of the resource capacity of the base station based on the priority.

According to the present invention, it is possible to assign a bandwidth to terminals in a disaster communication network in consideration of priorities, thereby providing a good quality service.

FIG. 1 illustrates an example of a criterion for calculating the importance of a user terminal for resource management according to the present invention.
2 is a diagram illustrating an example of a user class, which is one of criteria for calculating the importance of a user terminal,
3 is a view showing an example of user activity contents, which is one of criteria for calculating importance of a user terminal;
FIG. 4 illustrates an example of a method for resolving a resource allocation problem for a user terminal according to the present invention as a knapsack problem; FIG.
5 is a flowchart illustrating an example of a resource management method according to the present invention,
6 is a diagram showing a configuration of an embodiment of a resource management apparatus according to the present invention.

Hereinafter, a resource management method and apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating an example of a criterion for calculating the importance of a user terminal for resource management according to the present invention. FIG. 2 is a diagram showing an example of a user class, and FIG. 3 is a diagram showing an example of user activity contents.

Referring to FIG. 1, the degree of importance of a user terminal is determined using a rank C of a user, a distance D between the user and a disaster occurrence area, and a user activity.

The user class (C) decreases in importance in the order of control center, field commander, field activity member, and general public. The user class C may be mapped with identification information (e.g., telephone number, etc.) of the user terminal and preset and stored in a database or the like. In the user class (C), corresponding numerical values are set in advance according to importance. For example, referring to FIG. 2, the user class can be set to 45 for the control center, 25 for the field commander, 20 for the field crew, and 10 for the general public. The user class is not limited to this embodiment but can be variously modified.

The distance (D) from the disaster area increases as the distance difference between the disaster area and the user decreases. The importance according to distance from the disaster area can be set in inverse proportion to the distance.

The activity content M of the user is set in advance according to the role that the user performs in the disaster scene. The user activity content may be mapped with the identification information of the user terminal and stored in a database or the like in advance. User activity contents are set in advance according to activities such as rescue and relief activities, emergency routers, and financial support. For example, referring to FIG. 3, the importance of structure and relief activities is the highest, 24.842, and the importance of disaster psychological counseling is lowest, 4.852.

The importance of the user terminal can be calculated using at least one of the above-mentioned user class C, distance D, and activity content M. For example, the resource management device can use the identification information of the user terminals located in the disaster area to identify the numerical values of the class (C) and the activity content (M) stored in the database, (D) between the two locations using the location information of the area. Then, the resource management apparatus calculates the importance of the user terminal by summing up each of the identified values by taking the weight into consideration. This can be expressed as follows.

Where n is the index representing the user terminal, Vn is the importance of the nth user terminal, and Cn, Dn, and Mn are the rank, distance, and activity of the user associated with the nth user terminal, respectively. And,?,?,? Are preset weights according to the embodiment.

FIG. 4 is a diagram illustrating an example of a method of resolving a problem of resource allocation for a user terminal according to the present invention as a knapsack problem.

The problem of backfilling is that when you have a backpack of a given capacity, you put the things that are given to the backpack and give them the maximum value. Each item has its own weight and value, and the sum of all the items in the backpack does not exceed the backpack capacity.

When the backpack filling problem is applied to the present invention, the backpack capacity is the total resource capacity of the base station, the object entering the backpack is each user terminal in the base station, the weight of each object is the resource requirement (e.g., bandwidth) , The value of each item is related to the importance of each user terminal shown in FIG.

5 is a flowchart illustrating an example of a resource management method according to the present invention.

Referring to FIG. 5, the resource management apparatus calculates importance of each user terminal in FIG. 1 (S500). The resource management apparatus also determines the resource requirement of each user terminal (S510). For example, when a first user terminal requests a voice call, a second user terminal requires transmission of a text message, and a third user terminal requires transmission of an image, Are different from each other. The resource management apparatus can grasp the required resource amount of each user terminal using various conventional methods.

The resource management apparatus determines the priority based on the ratio of the importance level of each user terminal to the resource requirement level (S520). For example, the resource management apparatus can calculate the priority (importance / resource requirement) for each user terminal, and determine the priority of the user terminal based on the size.

If the priority is determined, the resource management apparatus sequentially allocates the resources requested by the user terminal based on the priority in the capacity range of the base station (S530). When the capacity of the base station is full, the resource allocation process for the user terminal is terminated (S540). In other words, the resource allocation process for the UE is sequentially performed based on the priority until the condition of the following equation is satisfied.

Where Vi is the importance of the ith user terminal, wi is the resource demand of the ith user terminal, and W is the total amount of resources of the base station. Equation (2) indicates that the importance of the user terminal is maximized, but the resource requirement of the user terminal can not exceed the capacity of the base station.

6 is a diagram showing a configuration of an embodiment of a resource management apparatus according to the present invention.

6, the resource management apparatus includes a priority calculation unit 600, a resource requirement determination unit 610, a priority calculation unit 620, and a resource allocation unit 630.

The importance calculation unit 600 grasps the rank and activity of the user related to the user terminal through a database and determines the distance between the two locations based on the location information of the user terminal and the location information of the disaster area. Then, the importance calculation unit 600 calculates the importance of each user terminal by summing each value according to the importance of the class, the activity content, and the distance, which are determined in consideration of the weight.

The resource requirement determination unit 610 determines a resource requirement amount such as bandwidth and traffic amount requested by each user terminal. The resource requirement determining unit 610 can grasp the resource requirement of each user terminal through various methods.

The priority calculating unit 620 determines a priority based on the importance of each user terminal and the resource requirement. For example, the priority calculating unit 620 can determine the priority among the user terminals based on the size of the value obtained by dividing the importance of each user terminal by the resource requirement.

The resource assignment unit 630 sequentially allocates resources to each user terminal based on priority in the capacity range of the base station.

The present invention can also be embodied as computer-readable codes on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the computer-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like. The computer-readable recording medium may also be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner.

The present invention has been described with reference to the preferred embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

Claims

A resource management method for a disaster communication network,
Calculating an importance of at least one user terminal in a certain area using at least one of a user's class, an activity content, and a distance to a disaster occurrence area;
Determining a resource requirement of the at least one user terminal;
Calculating a priority of the at least one user terminal based on the importance and the resource requirement; And
And allocating resources to the user terminals sequentially in the range of the resource capacity of the base station based on the priority.

2. The method of claim 1, wherein the calculating the priority comprises:
And determining a priority of a user terminal based on a ratio size of the resource requirement and the importance.

An importance calculating unit for calculating an importance of at least one user terminal in a certain area using at least one of a class, an activity content, and a distance to a disaster area;
A priority calculation unit for calculating a priority of the at least one user terminal based on the importance of the user terminal and the resource requirement of the user terminal; And
And allocating resources to the user terminals sequentially in the range of the resource capacity of the base station based on the priority.

In the third aspect, the priority calculating unit may calculate
Wherein the priority of each user terminal is determined based on the size ratio of the resource requirement of the user terminal to the importance of the user terminal.

A computer-readable recording medium having recorded thereon a program for performing the method according to any one of claims 1 to 3.