KR102026135B1 - Operation method of communication node in communication network - Google Patents

Abstract

A method of operating a communication node in a communication network is disclosed. The present invention provides a method of operation performed in a first communication node of a communication network, the method comprising: performing an initial connection with a second communication node included in a communication network, and based on a first policy of allocating a minimum of radio resources, Determining a minimum radio resource of the node, transmitting a first message including information about the minimum radio resource of the second communication node to the second communication node, and when receiving a BSR message from the second communication node, the BSR Determining a first suitable radio resource of the second communication node based on the second policy of allocating radio resources based on the message and receiving a second message including information about the first appropriate radio resource of the second communication node. Transmitting to a second communication node.

Description

Operation method of communication node in communication network {OPERATION METHOD OF COMMUNICATION NODE IN COMMUNICATION NETWORK}

The present invention relates to a method of operating a communication node in a communication network, and more particularly to a method for allocating radio resources based on the amount of data of a communication node in a communication network.

Recently, smart traffic has become popular and mobile traffic is rapidly increasing due to the emergence of mass convergence services such as internet of things (IoT), augmented reality and hologram. . In order to solve such problems as the increase of mobile traffic and the emergence of high-capacity convergence services, key performance indicators such as high frequency efficiency, low latency, and high connection density must be met.

To this end, 5GPP (5G Public Private Partnership) proposes a technology related to a crosshaul transport network that integrates a fronthaul section and a backhaul section of a 5G network. Specifically, the integrated transport network includes a plurality of high performance switches and is composed of various heterogeneous links including optical, high performance copper, millimeter wave (mmWave), etc. connecting them. In addition, the integrated transmission network connects a base station supporting a small cell and a base station supporting a macro cell or a core network connecting a remote radio head (RRH) and a digital unit (DU). You can perform the function of connecting.

In this case, the function of connecting the RRH and the DU in the integrated transport network may mean a function as a fronthaul link, and the function of connecting the base station supporting the macro cell and the base station supporting the small cell and the core network as the backhaul link. It can mean the function of. As such, the functions of the integrated transport network may be performed based on software defined networking (SDN) technology.

Meanwhile, the plurality of communication nodes included in the integrated transport network are based on a crosshaul control infrastructure (XCI) providing a control plane function or a crosshaul packet forward element (XFE) providing a data plane function. You can perform the operation. In addition, the plurality of communication nodes may be configured through a heterogeneous link based on wired communication or wireless communication. For example, the plurality of communication nodes may be configured through a millimeter wave based Long Term Evolution (LTE) protocol.

When using the LTE protocol in a communication network, a communication node must perform a procedure related to radio resource allocation for data transmission (for example, a service request (SR) procedure and a buffer status report (BSR) procedure, etc.). However, such a procedure related to radio resource allocation of a communication node may be efficient in terms of utilization of radio resources, but there is a problem of increasing latency and lowering a traffic transmission speed.

KR10-2016-0081865A (2016.07.08.)

An object of the present invention for solving the above problems is to provide a method for operating a communication node to allocate radio resources based on the amount of data of the communication node in the communication network.

An operation method performed in a first communication node of a communication network according to an embodiment of the present invention for achieving the above object, the method comprising: performing an initial connection with a second communication node included in the communication network, Determining a minimum radio resource of the second communication node based on a first policy of allocating a minimum radio resource, and receiving a first message including information on the minimum radio resource of the second communication node. Transmitting to a node, when receiving a buffer status report (BSR) message from the second communication node, based on a second policy of allocating radio resources based on the BSR message, the first titration of the second communication node; Determining a radio resource and transmitting a second message to the second communication node, the second message including information about a first suitable radio resource of the second communication node; It includes.

Here, the minimum radio resource of the second communication node is the number of communication nodes connected to the first communication node, the maximum radio resources allocable at the first communication node, and a management message at the second communication node. And a minimum radio resource required for simultaneously transmitting a BSR message.

Here, the first message may further include information on a transmission period of the BSR message and an indicator indicating transmission of the BSR message.

Here, the first message may be transmitted in a downlink control information (DCI) format including information on a minimum radio resource of the second communication node and information on a transmission period of the BSR message.

Here, the first message may be transmitted through a physical downlink control channel (PDCCH) of the first communication node.

Here, the first message and the second message may be transmitted to the second communication node based on a preset period.

Here, the first appropriate radio resource of the second communication node is included in the number of communication nodes connected to the first communication node, the maximum radio resources allocable by the first communication node, and the BSR message of the second communication node. It can be determined based on the amount of data collected.

Here, the first communication node may be a hub included in the communication network, and the second communication node may be a terminal connected to the first communication node.

The method of operating the first communication node may include performing an initial connection with a third communication node, which is one of at least one terminal included in the communication network, based on the first policy. The method may further include determining a radio resource and transmitting a third message including information on a minimum radio resource of the third communication node to the third communication node.

Here, the operation method of the first communication node is determined from the radio resources supported by the first communication node, the remaining radio resources except the minimum radio resources of the third communication node as a temporary radio resource of the second communication node. And transmitting a fourth message including information on the temporary radio resource of the second communication node to the second communication node.

Here, the method of operating the first communication node, when receiving a BSR message from each of the second communication node and the third communication node, based on the second policy and the second appropriate radio resources of the second communication node and Determining an appropriate radio resource of the third communication node and a message including a message about a second appropriate radio resource of the second communication node and information about an appropriate radio resource of the third communication node; The method may further include transmitting to each of the communication node and the third communication node.

An operation method performed in a first communication node of a communication network according to another embodiment of the present invention for achieving the above object, the method comprising: performing an initial connection with a second communication node included in the communication network, Receiving a first message including information on a radio resource from the second communication node, a buffer status report (BSR) including information on the amount of data existing in a buffer of the first communication node Generating a message, transmitting the BSR message to the second communication node using a radio resource indicated by the information on the radio resource, and wireless for transmitting data existing in the buffer from the second communication node Receiving a second message including information about the resource and the radio represented by the information about the radio resource included in the second message Using a circle and a step of the second transfer to the communication node a third message including the data.

Here, the first message may further include information on a transmission period of the BSR message and an indicator indicating transmission of the BSR message.

Here, the BSR message may be transmitted to the second communication node based on a transmission period of the BSR message included in the first message.

Here, the first communication node may be a terminal included in the communication network, and the second communication node may be a hub to which the first communication node is connected.

As a first communication node of a communication network according to another embodiment of the present invention for achieving the above object, a processor and a memory storing at least one instruction executed by the processor is stored. Wherein the at least one command is configured to perform initial access with a second communication node included in the communication network and to allocate a minimum minimum radio resource of a second communication node based on a first policy of allocating a minimum radio resource. Determine, and when the first message including information on the minimum radio resource of the second communication node is transmitted to the second communication node, and receives a buffer status report (BSR) message from the second communication node, Determine an appropriate radio resource of the second communication node based on the second policy of allocating a radio resource based on the BSR message, and It is executed to send a second message containing information about the radio resource information to the second communication node.

Here, the minimum radio resource of the second communication node is the number of communication nodes connected to the first communication node, the maximum radio resources allocable at the first communication node, and a management message at the second communication node. And a minimum radio resource required for simultaneously transmitting a BSR message.

Here, the first message may further include information on a transmission period of the BSR message and an indicator indicating transmission of the BSR message.

Here, the first message and the second message may be transmitted to the second communication node based on a preset period.

Here, the appropriate radio resource of the second communication node is the number of communication nodes connected to the first communication node, the maximum radio resources allocable by the first communication node, and data included in the BSR message of the second communication node. It can be determined based on the amount of.

According to the present invention, it is possible to efficiently allocate radio resources of a communication node in a communication network, thereby reducing latency of the communication network. In addition, the method of operating a communication node according to the present invention can fairly allocate radio resources to a plurality of communication nodes included in the communication network.

1 is a block diagram illustrating a first communication node performing a method of operating a communication node in a communication network according to an embodiment of the present invention.
2 is a conceptual diagram illustrating a first communication node performing a method of operating a communication node in a communication network according to an embodiment of the present invention.
3 is a conceptual diagram illustrating a communication network in which a method of operating a communication node is performed in a communication network according to an embodiment of the present invention.
4 is a flowchart illustrating a method of operating a communication node in a communication network according to an embodiment of the present invention.
5 is a flowchart illustrating a method of operating a communication node in a communication network according to another embodiment of the present invention.

As the present invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. The term and / or includes a combination of a plurality of related items or any item of a plurality of related items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

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. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, with reference to the accompanying drawings, it will be described in detail a preferred embodiment of the present invention. In the following description of the present invention, the same reference numerals are used for the same elements in the drawings and redundant descriptions of the same elements will be omitted.

1 is a block diagram illustrating a first communication node performing a method of operating a communication node in a communication network according to an embodiment of the present invention.

Referring to FIG. 1, a first communication node 100 performing a method of operating a communication node in a communication network of the present invention is a network connected to at least one processor 110, a memory 120, and a network to perform communication. The interface device 130 may be included. In addition, the first communication node 100 may further include an input interface device 140, an output interface device 150, a storage device 160, and the like. Each component included in the first communication node 100 may be connected by a bus 170 to communicate with each other.

The processor 110 may execute a program command stored in the memory 120 and / or the storage device 160. The processor 110 may mean a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods according to the present invention are performed. The memory 120 and the storage device 160 may be configured of a volatile storage medium and / or a nonvolatile storage medium. For example, the memory 120 may be configured as read only memory (ROM) and / or random access memory (RAM). Here, the program command executed by the processor 110 may include a plurality of steps for performing a method of operating a communication node in the communication network proposed by the present invention.

2 is a conceptual diagram illustrating a first communication node performing a method of operating a communication node in a communication network according to an embodiment of the present invention.

Referring to FIG. 2, a first communication node 100 performing a method of operating a communication node in a communication network according to an embodiment of the present invention may refer to the first communication node 100 described with reference to FIG. 1. Can be. For example, the first communication node 100 may mean a hub or terminal included in a communication network.

As such, the functions of the first communication node 100 may largely include the transport network function 101, the endpoint function 102, and the radio link function 103. Here, the plurality of functions included in the first communication node 100 mean logical configurations (for example, logical modules or logical function blocks) divided according to operations performed in the first communication node 100. can do.

Specifically, the transport network function 101 of the first communication node 100 may perform a function of supporting a registration procedure, deregistration procedure, and mobility of a terminal through a mobility controller included in the communication network. have. To this end, the transport network function 101 of the first communication node 100 includes an adaptation layer function 101-1 and a crosshaul control layer (XCL) function 101-2. can do.

Here, the adaptation layer function 101-1 included in the transport network function 101 may perform a function of generating an Xhaul common frame (XCF) packet for a transport network. Here, the XCF packet may be defined as a common packet transmitted in the transport network.

Here, the crosshaul control layer function 101-2 included in the transport network function 101 may be linked with the Xhaul control infrastructure (XCI) of the communication network, and may mean a function for a control plane of the transport network. Can be. In addition, the crosshaul control layer function 101-2 may perform a function similar to EPS session management (ESM) and EPS mobility management (EMM) in an LTE-based communication network.

In addition, the endpoint function 102 of the first communication node 100 performs a function related to an endpoint L1 function 102-1 and a link layer control (LLC) that perform a function related to a physical layer. May include endpoint L2 function 102-2.

Specifically, the endpoint function 102 of the first communication node 100 may be a base station supporting a small cell or a matching device between a remote radio head (RRH) and a terminal when the first communication node 100 is a terminal. Function can be performed. In addition, the endpoint function 102 of the first communication node may transmit data received from a device included in an Ethernet network or a common public radio interface (CPRI) device when the first communication node 100 is a terminal. A function for transmitting to the adaptation layer function 101-1 of the function 101 may be performed.

On the other hand, the endpoint function 102 of the first communication node 100 is a matching device between an end hub included in the communication network and an evolved packet core (EPC) network or DU when the first communication node 100 is a hub. Can perform the same function as In addition, the endpoint function 102 of the first communication node 100 may include an end hub included in a communication network and a matching device between the end hub and a neighboring hub when the first communication node 100 is a hub. Function can be performed.

In addition, the radio link function 103 of the first communication node 100 may perform a function as a matching device between the hub and the terminal, and may include a plurality of functions related to the LTE protocol layer. Specifically, the radio link function 103 is a plurality of functions related to the LTE protocol layer and includes an RF function 103-1, an L1 modem function 103-2, an L2 function 103-3, and an L3 function 103-. 4) may be included.

Here, in the L3 function 103-4 of the radio link function 103, an EMM function and an ESM function corresponding to a function of a non-access stratum (NAS) with respect to the LTE protocol layer may be excluded. However, in relation to the LTE protocol layer, an EMM function and an ESM function corresponding to a function of a non-access stratum (NAS) may be performed by the crosshole control layer function 101-2.

In detail, the L2 function 103-3 of the radio link function 103 may perform functions related to medium access control (MAC), radio link control (RLC), and packet data convergence protocol (PDCP). In addition, the L3 function 103-4 of the radio link function 103 may perform a function related to radio resource control (RRC).

As described above, the first communication node 100 may perform a function as a hub or a terminal included in the communication network, and based on this, a method of operating the communication node in the communication network according to an embodiment of the present invention. Can be done. Hereinafter, a communication network in which a method of operating a communication node in a communication network according to an embodiment of the present invention will be described in detail with reference to FIG. 3.

3 is a conceptual diagram illustrating a communication network in which a method of operating a communication node is performed in a communication network according to an embodiment of the present invention.

Referring to FIG. 3, a communication network according to an embodiment of the present invention may mean a transmission network 1 transmitting data between an EPC 1 and a base station 50 performing a function of a core network. have. For example, the transport network 1 shown in FIG. 3 may support the function of a backhaul link supporting data transmission between the EPC 1 and the base station 50. For example, the base station 50 may mean a base station supporting a small cell. That is, a method of operating a communication node in a communication network according to an embodiment of the present invention may be performed in a transmission network 1 supporting data transmission between the EPC 1 and the base station 50.

Specifically, the delivery network 1 of the present invention may include a plurality of hubs serving as fixed switches and a plurality of terminals serving as mobile switches. The plurality of hubs serving as fixed switches may include a first hub 20-1, a second hub 20-2, and a third hub 20-3. In addition, the plurality of hubs may be connected through heterogeneous links based on wired communication (indicated by a solid line in FIG. 3) or wireless communication (indicated by a dotted line in FIG. 3).

The first hub 20-1 of the plurality of hubs may be connected to a mobile Xhaul control unit (MXCU) 30. In detail, the mobility controller 30 may perform a function of supporting mobility in the delivery network 1 such as a mobility management entity (MME) of LTE communication. Thus, the mobility controller 30 may support the mobility of the delivery network 1 through the first hub 20-1.

In addition, the second hub 20-2 and the third hub 20-3 of the plurality of hubs may refer to end hubs to which terminals are connected. Also, the second hub 20-2 and the third hub 20-3 may perform millimeter wave-based beamforming, and transmit data to a terminal connected to the second hub 20-2 and the third hub 20-3.

In addition, the plurality of terminals serving as mobile switches in the transmission network 1 may include a first terminal 40-1 and a second terminal 40-2. Here, the first terminal 40-1 may mean a moving terminal capable of mobility support. In addition, the second terminal 40-2 may mean a fixed terminal that cannot support mobility.

Here, the first terminal 40-1 may be connected to the second hub 20-2, which is an end hub, and may communicate with the second hub 20-2. In addition, the second terminal 40-2 may be connected to the third hub 20-3, which is an end hub, and may communicate with the third hub 20-3. Here, the second terminal 40-2 may be connected to the base station 50, and may transmit data received from the third hub 20-3 to the base station 50.

Meanwhile, the second hub 20-2 and the third hub 20-3, which are the terminal hubs described above, may generate a plurality of beams through beamforming. Here, the plurality of beams may form a sector by forming a group. In addition, each of the plurality of beams included in a certain sector may have the same cell specific-reference signal position.

Therefore, cell identifiers of a plurality of beams included in a predetermined sector may be identical to each other, but beam identifiers may be different from each other. That is, the plurality of beams included in a certain sector may have different beam state information-reference signals (BSI-RSs) (for example, may refer to reference signals corresponding to CSI-RSs of LTE communication). .

As such, the second hub 20-2 and the third hub 20-3, which are end hubs, may commonly use signals and channels for a plurality of beams defined by the same cell identifier. . For example, the second hub 20-2 and the third hub 20-3 may include primary synchronization (PSS), secondary synchronization signal (SSS), and physical broadcast (PBCH) for a plurality of beams defined by the same cell identifier. channel, physical control format indicator channel (PCFICH), physical downlink control channel (PDCCH), physical hybrid-ARQ indicator channel (PHICH), physical uplink control channel (PUCCH), and physical random access channel (PRACH) have.

In addition, the second hub 20-2 and the third hub 20-3 may transmit the same system information (eg, a master information block (MIB)) through each of a plurality of beams defined by the same cell identifier. And system information block (SIB).

Meanwhile, the first terminal 40-1 may perform an initial attach procedure with the second hub 20-2. In addition, the second terminal 40-2 may perform an initial connection procedure with the third hub 20-3.

For example, the initial access procedure between the terminal and the hub may include receiving information on the MIB and SIB through synchronization obtained based on the PSS and SSS, selecting a cell, and performing a radio resource control (RRC) connection procedure. Performing a wireless bearer connection establishment with a hub, registering a terminal through interworking with a mobility controller (mobility controller 30 of FIG. 3), and establishing a session for data transmission. It may include.

According to an embodiment of the present invention illustrated in FIG. 3, a transmission network 1, which is another communication network, may be divided into a forward link and a reverse link according to a data transmission direction between a hub and a terminal. Specifically, the forward link may refer to a link through which data is transmitted from the hub to the terminal. In addition, the reverse link is a concept opposite to the forward link, and may mean a link through which data is transmitted from a terminal to a hub.

As such, the forward link and the reverse link between the hub and the terminal may be established based on the RRC connection procedure of the initial access procedure. In addition, management messages and data between the hub and the terminal may be transmitted over the forward link and the reverse link.

The present invention can propose a method for allocating radio resources for a forward link and a reverse link between a hub and a terminal. In particular, a method of operating a communication node in the communication network of the present invention described below may be a method of allocating radio resources for a reverse link between a hub and a terminal.

4 is a flowchart illustrating a method of operating a communication node in a communication network according to an embodiment of the present invention.

Referring to FIG. 4, a method of operating a communication node in a communication network according to an embodiment of the present invention may be performed by the first communication node 100. Here, the first communication node 100 may be the same as the first communication node 100 described with reference to FIGS. 1 and 2. In addition, the first communication node may refer to the third hub 20-3 included in the transmission network 1 described with reference to FIG. 3.

First, the first communication node 100 may perform an initial connection with the second communication node 200 included in the communication network (S101). Here, the communication network may mean the transmission network 1 described with reference to FIG. 3. In addition, the second communication node 200 may refer to a terminal connected to the first communication node. That is, when the first communication node 100 is the third hub 20-3 of FIG. 3, the second communication node 200 is connected to the second terminal 20-3 of FIG. 3. 40-2).

In addition, the procedure for the initial connection performed between the first communication node 100 and the second communication node 200 may refer to a plurality of steps included in the initial connection procedure between the terminal and the hub described with reference to FIG. 3. have.

Thereafter, the first communication node 100 may determine the minimum radio resource of the second communication node 200 based on the first policy of allocating the minimum radio resource (S102). Here, the minimum radio resource of the second communication node 200 is the number of communication nodes connected to the first communication node 100 (for example, the number of terminals connected to the hub) and the first communication node 100. It may be determined based on the maximum radio resources that can be allocated and the minimum radio resources required for simultaneously transmitting a management message and a buffer status report (BSR) message in the second communication node 200.

Specifically, the minimum radio resource determined by the first policy of allocating the minimum radio resource in the first communication node 100 may be determined based on Equation 1 below. The hub described in Equation 1 may mean the first communication node 100, and the first terminal may mean the second communication node 200.

는 제n 터미널로 할당되는 무선 자원을 의미할 수 있고,

는 허브에서 할당 가능한 최대한의 무선 자원을 의미할 수 있다. 또한, 상기 수학식 1에서

은 제n 터미널의 BSR 메시지에 포함된 데이터의 양에 대한 정보를 의미할 수 있다. 예를 들어, 데이터의 양에 대한 정보는 터미널에서 리버스 링크를 통해 전송해야 할 데이터의 양을 의미할 수 있다.In Equation 1

May refer to a radio resource allocated to an n-th terminal,

May mean the maximum radio resources that can be allocated in the hub. In addition, in Equation 1

May mean information on the amount of data included in the BSR message of the n-th terminal. For example, the information about the amount of data may refer to the amount of data to be transmitted through the reverse link at the terminal.

은 터미널이 허브에 초기 접속을 수행한 후 터미널에서 BSR 메시지를 전송하기 전까지 터미널에 할당되는 최소한의 무선 자원을 의미할 수 있다. 즉, 제1 통신 노드(100)는 상기 수학식 1을 기반으로 제2 통신 노드(200)의 최소 무선 자원을 결정할 수 있다. In addition, in Equation 1

May refer to the minimum radio resource allocated to the terminal after the terminal makes an initial connection to the hub and before the terminal transmits a BSR message. That is, the first communication node 100 may determine the minimum radio resource of the second communication node 200 based on Equation 1 above.

Thereafter, the first communication node 100 may generate a first message including information on a minimum radio resource of the second communication node 200 (S103). Here, the first message may further include information on a transmission period of the BSR message transmitted from the second communication node 200 and an indicator indicating the transmission of the BSR message.

Thereafter, the first communication node 100 may transmit the generated first message to the second communication node 200 (S104). Here, the first message may be transmitted in a downlink control information (DCI) format including information on a minimum radio resource of the second communication node 200 and information on a transmission period of the BSR message. In addition, the first message may be transmitted through the PDCCH of the first communication node 100.

Here, the first communication node 100 may transmit the first message to the second communication node 200 based on a preset period. In detail, the first communication node 100 may periodically transmit the first message to the second communication node 200 until the BSR message is received from the second communication node 200. In the present invention, a period in which the first message is preset for transmission may be referred to as a reverse link transmission time interval (TTI). That is, the first communication node 100 may transmit the first message to the second communication node 200 based on the reverse link TTI.

Meanwhile, the second communication node 200 may receive a first message including information on the minimum radio resource of the second communication node 200 from the first communication node 100. Thereafter, the second communication node 200 may check the radio resource indicated by the information on the minimum radio resource in the first message. In addition, the second communication node 200 may obtain an indicator indicating the transmission period of the BSR message and the transmission of the BSR message in the first message.

Thereafter, the second communication node 200 may check the amount of data existing in the buffer. Thereafter, the second communication node 200 may generate a BSR message including information on the amount of data existing in the buffer (S105).

Thereafter, the second communication node 200 may transmit a BSR message including information on the amount of data present in the buffer to the first communication node 100 by using the radio resource indicated by the information on the minimum radio resource. (S106). Here, the second communication node 200 may generate a BSR message based on a transmission period of the BSR message obtained in the first message, and transmit the generated BSR message to the first communication node 100.

For example, the second communication node 200 may check the amount of data present in the buffer based on the transmission period of the BSR message obtained in the first message. Thereafter, the second communication node 200 may generate a BSR message including information on the amount of data periodically checked. Thereafter, the second communication node 200 may transmit the periodically generated BSR message to the first communication node 100.

Meanwhile, the first communication node 100 may receive a BSR message from the second communication node 200. Thereafter, the first communication node 100 may determine the first proper radio resource of the second communication node 200 based on the second policy of allocating radio resources based on the BSR message (S107). Here, the first appropriate radio resource of the second communication node 200 is the number of communication nodes included in the communication network, the maximum radio resources allocable by the first communication node 100, and the amount of data included in the BSR message. It can be determined based on.

Specifically, the first appropriate radio resource determined by the second policy of allocating radio resources based on the BSR message of the second communication node 200 in the first communication node 100 is based on Equation 2 below. Can be determined. The hub described in Equation 2 may mean the first communication node 100, and the first terminal may mean the second communication node 200.

The meanings of the plurality of parameters included in Equation 2 may be the same as the meanings of the plurality of parameters described in Equation 1. According to Equation 2, the hub may determine the maximum radio resources that can be allocated according to the amount of data included in the BSR message of the plurality of terminals.

For example, a case may occur where all terminals connected to a hub transmit a BSR message with a data amount of O. That is, when the amount of data included in the BSR message received from all terminals connected to the hub is 0, the hub may equally determine the maximum radio resources allocable by the hub to all terminals connected to the hub. In detail, the radio resources equally determined may be expressed by Equation 3 below.

In another example, a BSR message with a zero amount of data on a control terminal of one of all terminals connected to a hub, and a nonzero amount of data on a terminal other than the nth terminal among all terminals. The case may occur. In this case, the radio resource determined at the hub may be expressed as Equation 4 below.

That is, the first communication node 100 may determine the first appropriate radio resource of the second communication node 200 based on Equation 2 above. Thereafter, the first communication node 100 may generate a second message including information on the first appropriate radio resource of the second communication node 200 (S108). Thereafter, the first communication node 100 may transmit a second message including information on the first appropriate radio resource of the second communication node 200 to the second communication node 200 (S109).

Here, the second message may be transmitted to the second communication node 200 based on the same period as the period in which the first message is transmitted in the first communication node 100. That is, the first communication node 100 may transmit the second message to the second communication node 200 based on the reverse link TTI which is the same period as the second message.

Meanwhile, the second communication node 200 may receive a second message including information on the first appropriate radio resource of the second communication node 200 from the first communication node 100. Thereafter, the second communication node 200 may check the radio resource indicated by the information on the first proper radio resource. Thereafter, the second communication node 200 may recognize that the identified radio resource is a radio resource for transmitting data existing in the buffer.

Thereafter, the second communication node 200 may generate a third message including data using the radio resource indicated by the information on the first appropriate radio resource (S110). That is, the second communication node 200 may generate a third message including data existing in the buffer by using the radio resource indicated by the information on the first proper radio resource. Thereafter, the second communication node 200 may transmit a third message to the first communication node 100 by using the radio resource indicated by the information on the first appropriate radio resource (S111). Accordingly, the first communication node 100 may receive a third message including data from the second communication node 200.

Through the above-described process, the first communication node 100 may allocate radio resources to the second communication node 200 based on the reverse link TTI, which is a preset period. In this case, the first communication node 100 may allocate the minimum radio resource based on the first policy until receiving the BSR message from the second communication node 200. In addition, when the first communication node 100 receives a BSR message from the second communication node 200, the first communication node 100 may allocate an appropriate radio resource based on the second policy.

Accordingly, the method of operating a communication node in a communication network according to an embodiment of the present invention periodically allocates radio resources in consideration of the data amount of a terminal at a hub without a procedure for requesting allocation of radio resources performed at a terminal. Can be.

Meanwhile, the first communication node 100 performing a method of operating a communication node in a communication network according to an embodiment of the present invention performs initial connection with a third communication node, which is one of at least one terminal included in the communication network. can do. In this case, a specific method of determining and allocating a radio resource of the third communication node 300 in the first communication node 100 may be described below with reference to FIG. 5.

5 is a flowchart illustrating a method of operating a communication node in a communication network according to another embodiment of the present invention.

Referring to FIG. 5, the first communication node 100 may perform an initial connection with a third communication node 300 which is one of at least one terminal included in the communication network (S112). Here, the procedure for the initial connection performed between the first communication node 100 and the third communication node 300 may mean a plurality of steps included in the initial connection procedure between the terminal and the hub described with reference to FIG. 3. have.

Thereafter, the first communication node 100 may determine the minimum radio resource of the third communication node 300 based on the first policy (S113). Here, the first policy may mean the first policy described with reference to FIG. 3. That is, the first communication node 100 may determine the minimum radio resource required for simultaneously transmitting the management message and the BSR message in the third communication node 300. In other words, the first policy may mean determining a radio resource based on Equation 1 described with reference to FIG. 3.

Thereafter, the first communication node 100 may generate a fourth message including information on the minimum radio resource of the third communication node 300 (S114). Here, the fourth message may further include information on a transmission period of the BSR message transmitted from the third communication node 300 and an indicator indicating the transmission of the BSR message.

Thereafter, the first communication node 100 may transmit the generated fourth message to the third communication node 300 (S115). Here, the first message may be transmitted in a downlink control information (DCI) format including information on a minimum radio resource of the third communication node 300 and information on a transmission period of the BSR message. In addition, the fourth message may be transmitted through the PDCCH of the first communication node 100.

Here, the first communication node 100 may transmit the fourth message to the third communication node 300 based on the reverse link TTI which is a preset period. In detail, the first communication node 100 may periodically transmit the fourth message to the third communication node 300 until the BSR message is received from the third communication node 300.

Thereafter, the first communication node 100 determines the remaining radio resources except the minimum radio resources of the third communication node 300 as the temporary radio resources of the second communication node from the radio resources supported by the first communication node 100. It may be (S116). Here, the radio resource supported by the first communication node 100 may mean the maximum radio resource that can be allocated by the first communication node 100.

Thereafter, the first communication node 100 may generate a fifth message including information on the temporary radio resource of the second communication node 200 (S117). Thereafter, the first communication node 100 may transmit a fifth message including information on the temporary radio resource of the second communication node 200 to the second communication node 200 (S118).

Meanwhile, the third communication node 300 may receive a fourth message from the first communication node 100 according to the fourth message transmission of the first communication node 100. Thereafter, the third communication node 300 may check the radio resource indicated by the information on the minimum radio resource of the third communication node 300 in the fourth message. In addition, the third communication node 300 may obtain an indicator indicating the transmission period of the BSR message and the transmission of the BSR message in the fourth message.

Thereafter, the third communication node 300 may check the amount of data present in the buffer. Thereafter, the third communication node 300 may generate a BSR message including information on the amount of data present in the buffer (S119).

Thereafter, the third communication node 300 may transmit a BSR message to the first communication node 100 using the radio resource indicated by the information on the minimum radio resource of the third communication node 300 (S120). Here, the third communication node 300 may generate a BSR message based on a transmission period of the BSR message acquired in the fourth message, and transmit the generated BSR message to the first communication node 100.

Meanwhile, the second communication node 200 may receive a fifth message including information on the temporary radio resource from the first communication node 100. Thereafter, the second communication node 200 may check the radio resource indicated by the information on the temporary radio resource of the second communication node 200 in the fifth message. Thereafter, the second communication node 200 may check the amount of data present in the buffer. Thereafter, the second communication node 200 may generate a BSR message including information on the amount of data existing in the buffer (S121).

Thereafter, the second communication node 200 may transmit the BSR message using the radio resource indicated by the information on the temporary radio resource in the generated BSR message (S122). In this case, the second communication node 200 may transmit the BSR message to the first communication node 100 based on the transmission period of the previously obtained BSR message.

Meanwhile, the first communication node 100 may receive a BSR message from each of the second communication node 200 and the third communication node 300. That is, when the first communication node 100 receives a BSR message from each of the second communication node 200 and the third communication node 300, a second of the second communication node 200 based on the second policy. An appropriate radio resource and an appropriate radio resource of the third communication node may be determined (S123). In other words, the second policy may mean determining a radio resource based on Equation 2 described with reference to FIG. 3.

Thereafter, the first communication node 100 receives a message including information on the second appropriate radio resource of the second communication node 200 and a message including information on the appropriate radio resource of the third communication node 300. Can be generated (S124). Thereafter, the first communication node 100 may transmit a message including information on the second appropriate radio resource of the second communication node 200 to the second communication node 200 (S125). In addition, the first communication node 100 may transmit a message including information on an appropriate radio resource of the third communication node 300 to the third communication node 300 (S126).

Accordingly, the second communication node 200 may receive a message including information on the second appropriate radio resource of the second communication node 200 from the first communication node 100. Thereafter, the second communication node 200 may transmit data to the first communication node 100 using a radio resource indicated by the information on the second appropriate radio resource.

In addition, the third communication node 300 may receive a message including information on an appropriate radio resource of the third communication node 300 from the first communication node 100. Thereafter, the third communication node 300 may transmit data to the first communication node 100 using a radio resource indicated by information on an appropriate radio resource of the third communication node 300.

Through the above-described process, the first communication node 100 of the present invention can determine a radio resource suitable for data transmission of the second communication node 200 and the third communication node 300, and determines the determined radio resource. It may be allocated to the second communication node 200 and the third communication node 300. Through this, the first communication node 100 of the present invention can improve the fairness (fairness) for the radio resources in the communication network, and can reduce the delay for the radio resource allocation procedure.

The methods according to the invention can be implemented in the form of program instructions that can be executed by various computer means and recorded on a computer readable medium. Computer-readable media may include, alone or in combination with the program instructions, data files, data structures, and the like. The program instructions recorded on the computer readable medium may be those specially designed and constructed for the present invention, or may be known and available to those skilled in computer software.

Examples of computer readable media include hardware devices that are 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 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 device described above may be configured to operate with at least one software module to perform the operations of the present invention, and vice versa.

Although described with reference to the embodiments above, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the spirit and scope of the invention as set forth in the claims below. Could be.

Claims (20)

An operation method performed at a first communication node of a communication network,
Performing an initial connection with a second communication node included in the communication network;
Determining a minimum radio resource of the second communication node based on a first policy of allocating a minimum radio resource;
Transmitting a first message including information on a minimum radio resource of the second communication node to the second communication node;
When receiving a buffer status report (BSR) message from the second communication node, determining a first appropriate radio resource of the second communication node based on a second policy of allocating a radio resource based on the BSR message ; And
And transmitting a second message containing information on a first suitable radio resource of the second communication node to the second communication node. The method according to claim 1,
The minimum radio resource of the second communication node is
The minimum number of communication nodes connected to the first communication node, the maximum amount of radio resources allocable by the first communication node, and the minimum required to simultaneously transmit a management message and a BSR message at the second communication node. The method of operating the first communication node, characterized in that determined based on a radio resource. The method according to claim 1,
The first message is,
And an indicator for indicating transmission of the BSR message and information about a transmission period of the BSR message. The method according to claim 3,
The first message is,
And transmitting information in a downlink control information (DCI) format including information on a minimum radio resource of the second communication node and information on a transmission period of the BSR message. The method according to claim 1,
The first message is,
And operating through a physical downlink control channel (PDCCH) of the first communication node. The method according to claim 1,
The first message and the second message,
And transmitting to the second communication node based on a predetermined period. The method according to claim 1,
The first appropriate radio resource of the second communication node is,
The number of communication nodes connected to the first communication node, the maximum amount of radio resources allocable by the first communication node, and the amount of data included in the BSR message of the second communication node. 1 Operation method of communication node. The method according to claim 1,
The first communication node,
A hub included in the communication network, and the second communication node is a terminal connected to the first communication node. The method according to claim 1,
The operating method of the first communication node,
Performing an initial connection with a third communication node, which is one of at least one terminal included in the communication network;
Determining a minimum radio resource of the third communication node based on the first policy; And
And transmitting a third message including information on the minimum radio resource of the third communication node, to the third communication node. The method according to claim 9,
The operating method of the first communication node,
Determining remaining radio resources, except for the minimum radio resources of the third communication node, from the radio resources supported by the first communication node as temporary radio resources of the second communication node; And
And transmitting a fourth message including information on the temporary radio resource of the second communication node to the second communication node. The method according to claim 10,
The operating method of the first communication node,
In case of receiving a BSR message from each of the second communication node and the third communication node, a second appropriate radio resource of the second communication node and an appropriate radio resource of the third communication node are determined based on the second policy. Making; And
Transmitting a message for a second suitable radio resource of the second communication node and a message containing information on an appropriate radio resource of the third communication node to the second communication node and the third communication node, respectively. The method of operation of a first communication node, further comprising. An operation method performed at a first communication node of a communication network,
Performing an initial connection with a second communication node included in the communication network;
Receiving a first message including information on the minimum radio resource determined based on a first policy from the second communication node;
Generating a buffer status report (BSR) message including information on the amount of data existing in a buffer of the first communication node;
Transmitting the BSR message to the second communication node using a radio resource indicated by the information on the minimum radio resource;
Receiving a second message from the second communication node, the second message including information on an appropriate radio resource for transmission of data existing in the buffer; And
Transmitting a third message including the data to the second communication node by using a radio resource indicated by information on an appropriate radio resource included in the second message,
The appropriate radio resource included in the second message is a radio resource determined based on a second policy based on the BSR message. The method according to claim 12,
The first message is,
And an indicator for indicating transmission of the BSR message and information about a transmission period of the BSR message. The method according to claim 13,
The BSR message is,
And transmitting to the second communication node based on a transmission period of the BSR message included in the first message. The method according to claim 12,
The first communication node,
A terminal included in the communication network, and the second communication node is a hub to which the first communication node is connected. A first communication node of a communication network,
A processor; And
At least one instruction executed by the processor includes a memory (memory),
The at least one command is
Perform an initial connection with a second communication node included in the communication network;
Determine a minimum minimum radio resource of the second communication node based on the first policy of allocating the minimum radio resource;
Send a first message to the second communication node, the first message including information on the minimum radio resource of the second communication node;
When receiving a buffer status report (BSR) message from the second communication node, determining an appropriate radio resource of the second communication node based on a second policy of allocating a radio resource based on the BSR message; And
And transmit a second message to the second communication node, the second message including information on an appropriate radio resource of the second communication node. The method according to claim 16,
The minimum radio resource of the second communication node is
The minimum number of communication nodes connected to the first communication node, the maximum amount of radio resources allocable by the first communication node, and the minimum required to simultaneously transmit a management message and a BSR message at the second communication node. And the first communication node is determined based on a radio resource. The method according to claim 16,
The first message is,
And an indicator indicating transmission of the BSR message and information on a transmission period of the BSR message. The method according to claim 16,
The first message and the second message,
And the second communication node is transmitted to the second communication node based on a preset period. The method according to claim 16,
Appropriate radio resource of the second communication node,
The number of communication nodes connected to the first communication node, the maximum amount of radio resources allocable by the first communication node, and the amount of data included in the BSR message of the second communication node. 1 Communication node.

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