KR20190087086A - A network system providing a network service to an user in a vehicle usiong relay node included in the vehicle - Google Patents

Abstract

The network system according to an embodiment can group terminals of users aboard a vehicle moving at high speed such as a train or a bus on the basis of a network service and relays the terminals to a network according to a group. Thus, the network system can more efficiently provide network services to terminals or users.

Description

TECHNICAL FIELD [0001] The present invention relates to a network system for providing a network service to users in a vehicle using a relay node included in a vehicle. [0002] A network system is disclosed in, for example, Japanese Unexamined Patent Publication (Kokai)

The present invention relates to a network system for providing network services to users in a vehicle using relay nodes.

The 5th Generation (5G) mobile communication is the key technology in the era of the 4th Industrial Revolution. It is a key to make a network that can exchange information by linking multiple devices and provide various services to individual and industrial areas. Infrastructure. In 5G mobile communication, it has developed a technology to provide a variety of super-connection-based services, ultra-high-capacity content transmission services and ultra-low-latency services, to accommodate a surge in data traffic and to provide users with high- It is.

In order to extend the coverage range of the base station to provide network services, a relay node may be used. In order for the terminals connected to the relay node to connect to the network, each of the terminals must perform the bearer setup of the network. The terminals connected to the relay node can be individually managed.

In the case of a UE-to-Network relay technology in which a UE outside the coverage range of a base station is connected to a network, a network service such as a VR (Virtual Reality) terminal or an AR (Augmented Reality) In particular, there is a problem that QoS (Quality of Service) exceeding a certain level can not be maintained.

The present invention proposes a network system for providing network services to users in a vehicle using a relay node installed in the vehicle.

The present invention proposes a network system for providing a network service to a terminal requesting a large-capacity data data transmission.

The present invention proposes a network system that assures a certain level of QoS.

According to an embodiment, there is provided a network access method performed by a relay node, the method comprising: performing an RRC connection with a base station; transmitting, to a gateway connected to the base station, an Attach message indicating that the relay node can relay data of a remote terminal Requesting an Attach Request from the gateway, and generating a bearer to be connected to a network connected through the base station when receiving Attach Accept corresponding to the Attach Request from the gateway, the bearer being connected to the relay node There is provided a network access method for providing a network service for a plurality of terminals in groups of the plurality of terminals grouped based on network services or Quality of Service (QoS) provided by the plurality of terminals.

The network system according to an exemplary embodiment may provide a network service to users in a vehicle using a relay node installed in the vehicle.

The network system according to one embodiment can provide a network service to a terminal requesting a large amount of data data transmission.

The network system according to one embodiment can guarantee a certain level of QoS.

1 is a diagram schematically illustrating the structure of a network system according to an embodiment.
2 is an exemplary diagram illustrating an operation of a relay node included in a vehicle and terminals connected to a relay node in a network system according to an exemplary embodiment.
3 is a diagram for explaining a protocol stack in a control plane of nodes included in a network system according to an embodiment.
4 is a diagram illustrating a protocol stack for data transmission in a network system according to an exemplary embodiment.
5 is a flowchart illustrating a network registration procedure of a relay node performed in a network system according to an embodiment and an operation in which a dedicated bearer is set up between a relay node and an application server to provide a network service.
6 is a flowchart illustrating an operation in which a terminal of a user who has boarded a vehicle including a relay node accesses a network through a relay node in a network system according to an exemplary embodiment.

It is to be understood that the specific structural or functional descriptions of embodiments of the present invention disclosed herein are presented for the purpose of describing embodiments only in accordance with the concepts 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. However, it is not intended to limit the embodiments according to the concepts of the present invention to the specific disclosure forms, but includes changes, 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.

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 invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning of the context in the relevant art and, unless explicitly defined herein, are to be interpreted as ideal or overly formal Do not.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, the scope of the patent application is not limited or limited by these embodiments. Like reference symbols in the drawings denote like elements.

1 is a diagram schematically illustrating the structure of a network system according to an embodiment. The network system according to an exemplary embodiment may support a hotspot function for providing a network service to a terminal of a passenger of a vehicle and a vehicle.

The network system according to one embodiment may include relay nodes 110 and 120 that are disposed in a mobile object such as a vehicle and provide network services to a terminal of the occupant of the vehicle. For example, a vehicle may include an automobile, a train, a vessel, an airplane, or the like. The relay nodes 110 and 120 may be mobile hotspot network terminal equipment (mTE). The relay nodes 110 and 120 may provide a network service to a terminal using a radio signal having a millimeter wave (mmWave) frequency. The millimeter-wave frequency can be used for securing broadband for transmission of tens of giga data between the relay nodes 110 and 120 and the base stations 130 and 140. The relay nodes 110 and 120 may be connected to the network via a wireless backhaul link in a vehicle moving at high speed. The relay nodes 110 and 120 set up an evolved packet system (EPS) bearer through a base station and a gateway, and set up a separate access link from the terminal. The terminal may be connected to the network via an access link provided at the relay nodes 110 and 120 to provide high capacity services. The access link may be a link based on at least one of WiFi, small cell, and FeD2D (Further enhanced D2D).

 The network system according to one embodiment may include base stations 130 and 140 that provide network services within a predetermined area (so-called coverage range). The base stations 130 and 140 may be mobile hotspot network digital units (mDUs), and may include a base station modem. 1, the relay node 110 may be included in the coverage area of the base station 130, and the relay node 120 may be included in the coverage area of the base station 140. FIG. Relay nodes 110 and 120 may connect to the corresponding base stations 130 and 140 based on 3GPP. For example, the relay nodes 110 and 120 may connect to the base stations 130 and 140 based on the operation of the 3GPP terminal connecting to the base stations 130 and 140. In this case, the EPS bearer associated with the relay node 110, 120 may be set. Furthermore, the relay nodes 110 and 120 can provide network services to the terminals in the deployed vehicle.

When the relay nodes 110 and 120 provide a network service to a terminal using a radio signal having a millimeter wave frequency (mmWave), based on the characteristics of the millimeter wave frequency, Sight) should be ensured. According to one embodiment, an environment in which a LoS is guaranteed between the relay nodes 110 and 120 and the base stations 130 and 140 may be configured. A terminal included in the vehicle is connected to the network via the relay nodes 110 and 120, so that a high-speed data transmission service capable of QoS control can be provided to the terminal.

The base stations 130 and 140 may allocate radio resources to the relay nodes 110 and 120 included in the coverage range or may manage the radio resources allocated to the relay nodes 110 and 120. The base stations 130 and 140 can manage the EPS bearer between the relay nodes 110 and 120 and the gateway 150. [ The EPS bearer refers to a logical path that the relay nodes 110 and 120 generate from the relay nodes 110 and 120 to the gateway 150 in order to access the network service.

The network system according to one embodiment may include a relay node 110, 120 and a gateway 150 that enables terminals included in the vehicle to access network services. In other words, the gateway 150 may serve as a kind of gateway for connecting the relay nodes 110 and 120 and the terminal to the network. The gateway 150 may support transmission of control signals and traffic.

The network system according to an exemplary embodiment may include an application server 160 providing an application service to a terminal connected to the relay nodes 110 and 120. An application program for providing an application service to the terminal can be executed in the application server 160. [

In order to maintain the QoS of the network service provided to the terminals connected to the relay nodes 110 and 120 at a level corresponding to the network service, the network system according to one embodiment includes a network setting method using the relay nodes 110 and 120 And a service setting method of the terminal. Accordingly, control messages transmitted and received in the wireless network can be reduced, and the network can be provided with a network service that is higher than the required QoS.

2 is an exemplary diagram for explaining the operation of the relay node 220 included in the vehicle 210 and the terminals 230 connected to the relay node 220 in the network system according to one embodiment.

One or more terminals may be included in the vehicle 210. Referring to FIG. 2, the terminals 230 included in the vehicle 210 can provide a service requiring a large amount of data, such as VR and AR, to a user. The relay node 220 can connect the terminals 230 requiring a large amount of data to the network. The terminals 230 may be connected to the network through the bearer and the representative address of the relay node 220.

The wireless signal used for connection between the relay node 220 and the terminals 230 may have a frequency of a license-exempt band such as WiFi or Bluetooth. In addition, the radio signal may have a millimeter wave used between the base station 240 and the relay node 220. The frequency of the radio signal between the relay node 220 and the terminals 230 may be determined by the operator of the network. In order to provide a service requiring a large amount of data, such as VR and AR, to the user through the terminals 230 or guarantee QoS corresponding to the network service supported by each of the terminals 230, The network system can perform QoS control between the relay node 101 and the remote terminal 201.

3 is a diagram for explaining a protocol stack in a control plane of nodes included in a network system according to an embodiment.

Referring to FIG. 3, a protocol stack 310 of a terminal, a protocol stack 320 of a relay node, a protocol stack 330 of a base station, and a protocol stack 340 of a gateway are shown. The relay node can perform a protocol function based on the 3GPP terminal. The relay node can support the proxy function for the terminal. In order for the relay node to support the proxy function to the terminal, the protocol stack 320 of the relay node includes (1) a NAS (Non-Access Stratum) protocol for registering the relay terminal to the network and managing the session of the relay terminal, (RRC) protocol for managing radio resources between a base station and a relay node, (3) a Radio Link Control (RLC) protocol for controlling a radio link, (4) a Media Access Control (MAC) (5) Physical layer protocol.

The relay node can act as a base station for the terminal. The relay node can allocate radio resources from the base station and then manage the radio resources with the terminal based on the allocated radio resources. The relay node can broadcast (broadcast) the discovery signal to the remote terminal. The relay node can create or manage a D2R radio bearer (DRB) corresponding to the QoS of the network service between the relay node and the remote terminal. In order for a relay node to create or manage a D2R radio bearer, the protocol stack 320 of the relay node and / or the protocol stack 310 of the terminal may include a Device to Relay (D2R) protocol.

The D2R (Device to Relay) protocol included in the protocol stack 320 of the relay node and / or the protocol stack 310 of the terminal may have an identifier between the relay node and the terminal. The D2R protocol can assign a local IP address to the terminal. The relay node can map the D2R radio bearer and the EPS bearer. The relay node can manage the terminals supporting the same network service as a group. The relay node manages the terminals supporting the same network service as a group, so that the QoS control between the relay node and the terminals can be efficiently performed.

4 is a diagram for explaining a protocol stack for data transmission of a terminal 410 in a network system according to an embodiment.

The UE 410 can use the EPS bearer established between the UE 410 and the relay node 420 and the established D2R radio bearer, the relay node 420 and the network in order to transmit data to the application server 430. Data of the terminal 410 may be transmitted to the application server 430 through the D2R radio bearer and the EPS bearer. In other words, the terminal 410 can access the network through the D2R radio bearer and the EPS bearer.

5 illustrates a network registration procedure of the relay node 502 performed in the network system according to an embodiment and an operation in which a dedicated bearer for providing the network service is set up between the relay node 502 and the application server 505 Fig. The network registration procedure of the relay node 502 may be performed based on the operations and messages of the 3GPP 23.401 standard.

Referring to FIG. 5, in step 511, an RRC connection setup between the relay node 502 and the base station 503 may be performed. In step 512, the relay node 502 may send an Attach Request to the gateway 504. Whether or not the relay node 502 supports a function of relaying data of a device (for example, the terminal 501) connected to the relay node 502 can be displayed in the UE capability of the Attach Request.

The Attach procedure performed between the relay node 502 and the gateway 504 may include an authentication operation between the gateway 504 and the relay node 502. In step 513, when verification of the relay node 502 is completed, the gateway 504 may perform the S1 bearer setup by combining Attach accept in the Initial context setup request. In step 514, the base station 503 may establish a DRB (Data Radio Bearer) through an RRC connection reconfiguration with the relay node 502. At step 515, the base station 503 may send an attach accept to the gateway 504. [ At step 516, a default EPS bearer may be established between the relay node 502 and the network.

Then, the relay node 502 can additionally generate a dedicated D2R bearer for providing the network service to the terminal 501.

More specifically, in step 517, in order to allocate the dedicated D2R bearer, the relay node 502 may transmit a bearer resource modification corresponding to the service to be provided to the terminal 501 to the gateway. For example, a dedicated bearer may be a bearer for a second multicast service. In step 518, the gateway 504 may send a Bearer Resource Modification for the network service that the relay node 502 intends to provide to the terminal 501. At step 519, the gateway 504 may request a D2R dedicated bearer setup to provide services to the terminal 501 in accordance with the QoS policy. In step 520, the base station 503 may send an RRC connection reconfiguration request to the relay node 502 for additional bearer setup with the relay node 502. In step 521, when the radio bearer setup between the relay node 502 and the base station 503 is completed, in step 522, the bearer setup for providing the service can be completed.

The bearer can provide a service for each group of terminals 501 requesting the same service. Accordingly, as the traffic between the relay node 502 and the network is reduced, the application server 505 can provide the network service corresponding to the QoS to the terminal 501.

6 is a flowchart for explaining an operation in which a terminal 601 of a user boarding a vehicle including a relay node 602 accesses a network via a relay node 602 in a network system according to an embodiment. The relay node 602 and the terminal 601 can perform channel synchronization using a synchronization channel. The relay node 602 may send a discovery signal to the terminal 601. A user aboard a vehicle moving at a high speed can receive network service through the relay node 602 instead of directly connecting to the network to use various network services. In other words, instead of requesting the network service directly to the network by the user, the network service request is performed for each network service having the same QoS in a plurality of users via the relay node 602, thereby reducing the control procedure and time of the network have.

In step 611, the terminal 601 can identify the relay node 602 using the discovery signal. In step 612, the terminal 601 may perform an RRC connection setup with the relay node 602.

In step 613, the terminal 601 may send an Indirect Service Request to the relay node 602. [ At this time, the terminal 601 can transmit information about the application server 605 to receive the service. In other words, the terminal 601 can transmit information on a network service to be used to the relay node 602. If the EPS bearer corresponding to the QoS of the network service is set up to the base station and the gateway, the relay node 602 may transmit the bearer information included in the RRC connection reconfiguration in step 619.

In step 614, if a bearer for the requested network service is not set in the relay node 602, the relay node 602 may send a dedicated bearer setup request to the gateway 604. [ In step 615, the gateway 604 may send the bearer setup requested by the relay node 602 according to the QoS policy. In steps 617 and 618, a dedicated bearer may be established between the relay node 602 and the base station 603. In step 619, the relay node 602 can establish a radio bearer with the terminal 601 and map it to an EPS bearer with the network. The relay node 602 can send the information that sets the radio bearer and the information mapped to the EPS bearer to the terminal 601. [

At step 620, the relay node 602 may inform the upper protocol that the bearer setup is complete. At step 621, the relay node 602 and the terminal 601 may transmit data to the network via a dedicated bearer.

In summary, the network system according to an exemplary embodiment can group terminals of users aboard a vehicle moving at high speed such as a train or a bus on the basis of a network service, and relays terminals to a network according to a group. Thus, the network system can more efficiently provide network services to terminals or users.

More specifically, the relay node 602 of the vehicle providing the network service to the terminal 601 included in the moving vehicle does not set the bearer individually for the terminal 601, Can be set and managed. As the bearer is set up and managed for each group of the terminal 601, the complexity of the connection of the terminal 601 can be reduced. In addition, the procedure for setting up the network service by the terminal 601 can be simplified. Furthermore, the network system according to an embodiment can support a large-capacity network service while supporting QoS control between the relay node 602 and the terminal 601 by setting up a bearer for each service provided to the terminal 601. [

The components described in the embodiments may be implemented by a programmable logic device such as one or more DSP (Digital Signal Processor), a processor, a controller, an application specific integrated circuit (ASIC), and a field programmable gate array Logic Element, other electronic devices, and combinations thereof. ≪ RTI ID = 0.0 > At least some of the functions or processes described in the embodiments may be implemented by software, and the software may be recorded in a recording medium. The components, functions and processes described in the embodiments may be implemented by a combination of hardware and software.

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, 120: relay node
130, 140: base station
150: Gateway
160: application server

Claims (1)

In a network access method performed by a relay node,
Performing an RRC connection with a base station;
Transmitting an Attach Request indicating that the relay node can relay data of a remote terminal to a gateway connected to the base station; And
When receiving Attach Accept corresponding to the Attach Request from the gateway, generating a bearer to be connected to a network connected through the base station
Lt; / RTI >
The bearer includes:
Wherein the network service is provided for a plurality of terminals connected to the relay node for each group of the plurality of terminals grouped based on a network service or quality of service (QoS) provided by the plurality of terminals.

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