KR101763525B1 - Mobile communication system and method for setting schedule of the mobile communication system - Google Patents

Abstract

A mobile communication system comprising: at least one mobile communication terminal; at least one base station transmitting and receiving data with at least one mobile communication terminal; a mobility management entity (MME) managing authentication and mobility of at least one mobile communication terminal; The MME allocates a bearer having different quality of service characteristics for each of at least one mobile communication terminal and allocates a scheduling request resource to one or more mobile communication terminals in consideration of each quality of service To the mobile communication system.

Description

TECHNICAL FIELD [0001] The present invention relates to a mobile communication system and a scheduling method for establishing a scheduling of the mobile communication system,

Embodiments of the present invention relate to a mobile communication system and a scheduling setting method of the mobile communication system.

The mobile communication terminal of the LTE mobile communication system has different quality of service for each bearer set after the initial connection, and the service quality can be defined as a minimum guaranteed bandwidth, a maximum bandwidth and a delay time.

Generally, the delay time refers to a time required for unidirectional transmission of user data at a transmission layer between a base station and an activated mobile communication terminal.

If there is data to be transmitted in the uplink, the activated mobile communication terminal notifies the base station that there is data to be transmitted to the base station through a scheduling request, and the base station, which has received the data, And may send a scheduling grant.

The mobile communication terminal performs a buffer status report (Buffer Status Report) on the data size to be transmitted in the uplink through the scheduling approval, and the base station specifies the uplink radio resource allocation and modulation scheme for reporting and notifies the mobile communication terminal have.

When there is data to be transmitted in the uplink, the radio resources for the scheduling request can not be mutually shared among the mobile communication terminals due to the characteristics of the LTE OFDM transmission scheme having orthogonality, and the specific resources can be independently allocated to the respective mobile communication terminals Should be allocated.

As the scheduling requests are independently allocated, each mobile communication terminal must transmit a scheduling request only at a time period and location specified by the base station, and as the designated time period becomes longer, it may occur as a delay element in uplink data transmission.

As the number of mobile communication terminals connecting to the base station increases, the time period of resources for the scheduling request can not be increased. Since the request for the service quality may be different for each mobile communication terminal, A method is needed.

An embodiment of the present invention provides a method for setting a scheduling request period differentially to a mobile communication terminal that requires a low delay considering a delay factor among service quality criteria of each mobile communication terminal in an LTE system. have.

A mobile communication system according to an embodiment of the present invention includes at least one mobile communication terminal, at least one base station transmitting and receiving data to and from at least one mobile communication terminal, a mobility management apparatus managing authentication and mobility of the at least one mobile communication terminal And a gateway (GW) for distributing traffic to the one or more base stations, wherein the MME allocates bearers having different service quality characteristics to the one or more mobile communication terminals, And allocates scheduling radio resources to the one or more mobile communication terminals in consideration of the respective service qualities.

According to one aspect of the present invention, the MME allocates a default bearer for IP address allocation, and the default bearer may transmit user data traffic to the one or more mobile communication terminals.

According to an aspect of the present invention, when the at least one base station receives the resource configuration information for the new bearer, it searches the existing bearer for the mobile communication terminal corresponding to the resource configuration information, The idle scheduling request resource is selected and allocated among the resources corresponding to the packet delay tolerance group corresponding to the QCI of the new bearer and the idle scheduling request resource can be set as the existing bearer packet delay time.

According to an aspect of the present invention, the at least one BS compares a delay time of a new bearer packet with a delay time of an existing bearer packet when an existing bearer exists, The mobile station can allocate a scheduling request radio resource in the group corresponding to the packet delay time of the new bearer and recover the existing allocated scheduling request radio resource.

According to an aspect of the present invention, when the release information for the bearer is received, the at least one base station compares the packet delay time allowed for the bearer requesting the release with the packet delay time set for the mobile communication terminal, If the two packet delay allowable times are equal to each other, searching for a bearer having a minimum packet delay allowable time among the remaining bearers excluding the bearer for which the release is requested, and selecting an idle scheduling request resource in the packet delay allowable time group corresponding to the searched bearer And can recover the existing allocated scheduling request radio resource.

According to an embodiment of the present invention, it is possible to provide a method of setting a scheduling request period differentially to a mobile communication terminal that requires a low delay considering a delay factor among service quality criteria of each mobile communication terminal in an LTE system .

1 is a block diagram illustrating a configuration of a mobile communication system according to an embodiment of the present invention.
2 is a flowchart illustrating a scheduling setting method of a mobile communication system according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS Embodiments of the present invention will now be described in detail with reference to the accompanying drawings and the accompanying drawings, wherein specific structural or functional descriptions for embodiments according to the concepts of the present invention disclosed herein The embodiments according to the concept of the present invention may be embodied in various forms and are not limited to the embodiments described herein.

Embodiments in accordance with the concepts of the present invention are capable of various modifications and may take various forms, so that the embodiments are illustrated in the drawings and described in detail herein. It is to be understood, however, that the intention is not to limit the embodiments according to the concepts of the present invention to the specific disclosed embodiments, but includes modifications, equivalents, or alternatives falling within the spirit and scope of the present invention

The terms first, second, or the like may be used to describe various elements, but the elements should not be limited by the terms. The terms may be named for the purpose of distinguishing one element from another, for example without departing from the scope of the right according to the concept of the present invention, the first element being referred to as the second element, Similarly, the second component may also be referred to as the first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Expressions that describe the relationship between components, for example, "between" and "immediately" or "directly adjacent to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises ", or" having ", and the like, are used to specify one or more of the features, numbers, steps, operations, elements, But do not preclude the presence or addition of steps, operations, elements, parts, or combinations thereof.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The terminology used herein is a term used for appropriately expressing an embodiment of the present invention, which may vary depending on the user, the intent of the operator, or the practice of the field to which the present invention belongs. Therefore, the definitions of these terms should be based on the contents throughout this specification.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this embodiment belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as ideal or overly formal in the sense of the art unless explicitly defined herein Do not.

In the following description of the present invention with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. In the following description of the embodiments, a detailed description of related arts will be omitted if it is determined that the gist of the embodiments may be unnecessarily blurred.

The mobile communication system according to an exemplary embodiment of the present invention may set a scheduling request period in consideration of a delay factor among service quality criteria of each mobile communication terminal in an LTE system.

In a mobile communication system according to an aspect of the present invention, when a bearer having different quality of service characteristics is set for each mobile communication terminal, the scheduling radio resource can be allocated to the mobile communication terminal in consideration of each service quality.

A mobile communication system according to an aspect of the present invention is characterized in that when a mobile communication terminal having a latency sensitive service registered in a base station transmits uplink traffic without uplink traffic, The uplink data traffic transmission delay time can be reduced.

1 is a block diagram illustrating a configuration of a mobile communication system according to an embodiment of the present invention.

1, a mobile communication system according to an embodiment of the present invention includes at least one mobile communication terminal 110, at least one base station 120 that transmits and receives data to and from at least one mobile communication terminal 110, A Mobility Management Entity (MME) 130, and a gateway (GW) 140.

The mobile communication system according to an aspect of the present invention may be configured in a network structure for data communication with an external Internet network in an LTE mobile communication network.

A mobility management apparatus (hereinafter referred to as MME) manages authentication and mobility of one or more mobile communication terminals 110.

The MME 130 allocates a bearer having different service quality characteristics to one or more mobile communication terminals 110, and allocates a scheduling radio resource to one or more mobile communication terminals in consideration of each service quality.

For example, the MME 130 may assign a default bearer for IP address allocation, and the default bearer may transmit user data traffic to one or more mobile communication terminals 110. [

The Dedicated bearer can start the allocation procedure at the mobile communication terminal 110 or the mobile communication network at initial connection or as needed, and can have a QCI (Qos Class Identifier) different from the default bearer.

For example, the QCI can be represented by an integer value of 1 to 9 as a QoS priority, and a resource type (Resource Type, for example, Guaranteed Bit Rate (GBR) or Non-GBR) (For example, 1 to 9), a packet delay budget (for example, expressed as 50 ms to 300 ms), a Packet Error Loss Rate (for example, 10 to 10 (Expressed as " -6 ").

The gateway distributes traffic to one or more base stations (120).

2 is a flowchart illustrating a scheduling setting method of a mobile communication system according to an embodiment of the present invention.

 The scheduling configuration method of the mobile communication system according to an embodiment of the present invention is a method for allocating a radio resource for scheduling request in the mobile communication system and can be performed through a radio resource controller for managing radio resources in the base station .

Referring to FIG. 2, the radio resource control unit may perform configuration management and radio resource management of a corresponding mobile communication terminal related to connection and bearer setting used in a mobile communication terminal from a long-term perspective.

The short-term radio resource management can be handled by the scheduler of the base station.

For example, the radio resource controller may classify the scheduling request resources into n groups based on the packet delay time.

As a concrete example, the radio resource control unit can classify four packet delay time (50 ms, 100 ms, 150 ms, and 300 ms) on the basis of QCI in LTE, and may have different granularity when grouped into groups.

The radio resource control unit may allocate a scheduling resource request resource in advance for each group when it is classified into a group.

At this time, each group may have the same Physical Uplink Control CHannel (PUCCH) -Resource Index for convenience of implementation, and the radio resource control unit may allocate radio resources to each mobile communication terminal at a subframe offset.

If the radio resource controller receives the resource setting information for the new bearer (201), the radio resource controller can search for an existing bearer for the corresponding mobile communication terminal (202).

If the existing bearer does not exist, the radio resource controller selects and allocates an idle scheduling request resource among the resources corresponding to the packet delay allowed time group corresponding to the QCI of the new bearer (203), and allocates the scheduling request resource to the existing bearer packet delay time (204).

If the existing bearer exists, the radio resource controller may compare the new bearer packet delay time with the existing bearer packet delay time (205).

If the packet delay time of the new bearer is smaller than the existing packet delay time, the radio resource controller allocates the scheduling request radio resource in the group corresponding to the packet delay time of the new bearer (206) (207), and perform a bearer setup response (208).

If the release information for the bearer is received (209), the radio resource control unit searches for the bearer requesting release, and compares the packet delay time allowed for the bearer with the packet delay time set for the mobile communication terminal 210).

If the packet delay time allowed for the corresponding bearer and the packet delay time set for the mobile communication terminal are the same, the radio resource controller can search for the bearer having the minimum packet delay allowed time of the remaining bearers excluding the bearer requesting the release 211).

The radio resource controller selects and allocates an idle scheduling request resource to a packet delay allowed time group corresponding to the searched bearer (212), recovers (213) a previously allocated scheduling request radio resource, and performs a bearer setup response (208).

The apparatus described above may be implemented as a hardware component, a software component, and / or a combination of hardware components and software components. For example, the apparatus and components described in the embodiments may be implemented within a computer system, such as, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable gate array (FPGA) , A programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to execution of the software. For ease of understanding, the processing apparatus may be described as being used singly, but those skilled in the art will recognize that the processing apparatus may have a plurality of processing elements and / As shown in FIG. For example, the processing unit may comprise a plurality of processors or one processor and one controller. Other processing configurations are also possible, such as a parallel processor.

The software may include a computer program, code, instructions, or a combination of one or more of the foregoing, and may be configured to configure the processing device to operate as desired or to process it collectively or collectively Device can be commanded. The software and / or data may be in the form of any type of machine, component, physical device, virtual equipment, computer storage media, or device , Or may be permanently or temporarily embodied in a transmitted signal wave. The software may be distributed over a networked computer system and stored or executed in a distributed manner. The software and data may be stored on one or more computer readable recording media.

The method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

110: mobile communication terminal
120: base station
130: MME
140: GW

Claims (5)

One or more mobile communication terminals;
At least one base station transmitting and receiving data with the at least one mobile communication terminal;
A mobility management entity (MME) for managing authentication and mobility of the at least one mobile communication terminal; And
A gateway (GW) for distributing traffic to the one or more base stations,
Lt; / RTI >
The MME,
Allocating a bearer having different service quality characteristics for each of the one or more mobile communication terminals,
Allocating a scheduling request resource to the one or more mobile communication terminals in consideration of the respective service qualities,
Wherein the at least one base station comprises:
Comparing the delay time of the new bearer packet with the delay time of the existing bearer packet if the existing bearer exists,
Allocating a scheduling request radio resource in a group corresponding to a packet delay time of the new bearer when the packet delay time of the new bearer is smaller than the existing bearer packet delay time,
Mobile communication system. The method according to claim 1,
The MME,
Assigns a default bearer for IP address allocation,
Wherein the default bearer transmits user data traffic to the one or more mobile communication terminals,
Mobile communication system. The method according to claim 1,
Wherein the at least one base station comprises:
When receiving the resource setting information for the new bearer, searching for whether there is an existing bearer for the mobile communication terminal corresponding to the resource setting information,
If there is no existing bearer, selects an idle scheduling request resource among resources corresponding to a packet delay allowed time group corresponding to the QCI (Qos Class Identifier) of the new bearer,
Setting the idle scheduling request resource to an existing bearer packet delay time,
Mobile communication system. The method according to claim 1,
Wherein the at least one base station comprises:
When a scheduling request radio resource is allocated in a group corresponding to a packet delay time of the new bearer,
The method of claim 1,
Mobile communication system. The method according to claim 1,
Wherein the at least one base station comprises:
When the release information for the bearer is received, compares the packet delay allowable time corresponding to the bearer for which the release is requested with the packet delay allowable time set for the mobile communication terminal,
If the two packet delay allowable times are equal to each other, searching for a bearer having a minimum packet delay allowable time among the remaining bearers excluding the bearer requesting the release,
Selecting and allocating idle scheduling request resources to a packet delay allowed time group corresponding to the searched bearer,
Recalling an existing assigned scheduling request radio resource,
Mobile communication system.

Images