KR102715018B1 - Base station and method for control of data transmission using the same - Google Patents

Abstract

The present invention relates to a method for a base station to control data of a terminal, comprising the steps of: transmitting an initial UE message including terminal identification information to a network; receiving an initial context setup request message including a terminal IP address allocated from the network; storing the terminal IP address; receiving the data from the terminal through a radio bearer using base station identification information (cell specific ID); and transmitting the data to a server using server identification information and the terminal IP address.

Description

Base station equipment and method for controlling data transmission of terminal using the same {BASE STATION AND METHOD FOR CONTROL OF DATA TRANSMISSION USING THE SAME}

The present invention relates to base station equipment and a method for controlling data transmission of a terminal using the same, and more specifically, to base station equipment and a method for controlling data transmission of a terminal using the same in a wireless communication system communicating with an Internet of Things device.

The basic communication technologies for the advent of the Internet of Things (M2M/IoT/IoE (Internet of Everything) era) are being continuously developed worldwide. Representative short-range wireless communication technologies between objects are known and are receiving attention, such as Zigbee, Z-wave, NFC, Bluetooth, and Wi-Fi.

As a large number of short-range IoT devices installed for various purposes in various environments are used independently and in an overlapping manner, the demand for operational methods to manage a large number of IoT devices is gradually increasing.

In the communication network of many IoT devices, research is being conducted to reduce the complexity of terminals and reduce the load on terminals in order to implement low power consumption and reduce costs.

The problem to be solved by the present invention is to provide a base station equipment capable of lowering the complexity of a terminal and reducing the load of a terminal in a communication network of a machine-to-machine communication device, and a method for controlling data transmission of a terminal using the base station equipment.

A method for a base station to control data of a terminal according to one embodiment of the present invention comprises the steps of transmitting an initial UE message including terminal identification information to a network, receiving an initial context setup request message including a terminal IP address allocated from the network, storing the terminal IP address, receiving data from the terminal through a radio bearer using base station identification information (cell specific ID), and transmitting the data to a server using server identification information and the terminal IP address.

The method may further include, prior to the step of transmitting the initial terminal message to the network, a step of receiving an RRC connection request message including terminal identification information and identification information of a server to which the terminal transmits data from the terminal, a step of storing the terminal identification information and the server identification information, and a step of transmitting an RRC connection setup message including base station identification information (Cell specific ID) to the terminal.

The step of transmitting the above data to the server can transmit the data using TCP/IP (Transmission Control Protocol/Internet Protocol).

The method may further include a step of receiving control data from the server, and a step of transmitting the control data to the terminal via a radio bearer using a physical layer and a medium access control layer.

The step of receiving control data from the above server can receive data via TCP/IP (Transmission Control Protocol/Internet Protocol).

The step of receiving the data from the terminal via a radio bearer, and the step of transmitting the control data to the terminal using a radio bearer can control errors using an Automatic Repeat Request (ARQ) method.

A base station for managing data transmission of a terminal according to one embodiment of the present invention includes a terminal communication layer for receiving uplink data transmitted from a terminal using a physical layer and a medium access control layer and transmitting downlink data transmitted from a server to the terminal, and a server communication layer for transmitting the uplink data to the server and receiving the downlink data transmitted from the server using a TCP/IP layer.

The above terminal communication layer can receive an RRC connection request message including terminal identification information and identification information of a server to which the terminal transmits data from the terminal, and transmit an RRC connection setup message including base station identification information (Cell specific ID) information to the terminal.

The above server communication layer may include an IP layer that receives the terminal IP address from the core network, a TCP/IP layer that transmits the data received at the terminal communication layer to the server using the transmission control protocol (TCP), and an application layer that includes an application program that uses the network.

The above server communication layer can store the assigned terminal IP address and transmit data received from the terminal to the server through the TCP/IP layer using the terminal IP address.

A base station for managing data transmission of a terminal according to one embodiment of the present invention includes a terminal, a communication unit for performing data transmission and reception with a server, a memory for storing a program for managing data transmission of the terminal, the communication unit, and a processor for executing an operation implemented in the program in conjunction with the memory, wherein the program includes commands for storing terminal identification information received from the terminal through the communication unit, server identification information, and a terminal IP address allocated from a core network in the memory, and transmitting data received from the terminal to the server using the server identification information and the terminal IP address.

The above communication unit can receive an RRC connection request message including terminal identification information and target server identification information to which the terminal transmits data from the terminal, transmit an initial UE message including the terminal identification information to a network, and receive an initial context setup request message including an IP address allocated from the network.

The above memory can store the server identification information and the terminal IP address corresponding to the terminal identification information.

The above communication unit can transmit an RRC connection setup message including the base station identification information (Cell specific ID) to the terminal.

The above communication unit can receive the data from the terminal through a wireless bearer and transmit the data to the server through TCP/IP (Transmission Control Protocol/Internet Protocol).

The above communication unit can receive control data from the server and wirelessly transmit the control data to the terminal.

The above communication unit can receive control data from the server via TCP/IP (Transmission Control Protocol/Internet Protocol) and wirelessly transmit the control data to the terminal via a wireless bearer.

A terminal for transmitting and receiving data with a server through a base station according to one embodiment of the present invention includes a communication unit for transmitting and receiving data with the base station, a memory for storing a program for transmitting data, the communication unit, and a processor for executing an operation implemented in the program in conjunction with the memory, wherein the program includes commands for storing cell specific identification information (Cell specific ID) received from the base station through the communication unit, and transmitting uplink data to the base station through a physical layer and a medium access control layer using the cell specific identification information.

The above uplink data can be transmitted to the server using the TCP/IP layer included in the base station.

The above communication unit can receive downlink data transmitted from the base station through the physical layer and the medium access control layer.

According to an embodiment of the present invention, the signaling load between a terminal and a base station in a communication network of a machine-to-machine communication device can be reduced.

According to an embodiment of the present invention, a terminal capable of operating in a low-power environment in a communication network of a machine-to-machine communication device can be provided, and the manufacturing cost of the terminal can be reduced.

Figure 1 is a schematic configuration diagram of a wireless communication system according to an embodiment of the present invention.
Figure 2 is a drawing showing the configuration of a wireless communication system according to a comparative example of the present invention.
FIG. 3 is a diagram showing the configuration of a wireless communication system according to an embodiment of the present invention.
FIG. 4 is a flowchart of a service request procedure for data transmission between a terminal and a base station in a wireless communication network according to one embodiment of the present invention.
FIG. 5 is a flowchart showing a data processing method of base station equipment according to one embodiment of the present invention, showing the data processing method of base station equipment of FIG. 1.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In addition, in order to clearly describe the present invention in the drawings, parts that are not related to the description are omitted, and similar parts are assigned similar drawing reference numerals throughout the specification.

Throughout the specification, when a part is said to "include" a component, this does not mean that it excludes other components, but rather that it may include other components, unless otherwise specifically stated. In addition, terms such as "part," "unit," and "module" described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware, software, or a combination of hardware and software.

In this specification, a terminal may be an Internet of Things (also called "IoT") device that connects all communicable objects to a network and enables mutual communication. In other words, a terminal may mean an object (or sensor node) equipped with short-range and long-range communication functions including RFID and capable of producing and utilizing data such as sensors.

However, the present invention is not necessarily limited thereto, and the terminal may refer to a mobile station (MS), a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), a user equipment (UE), an access terminal (AT), etc., and may include all or part of the functions of a terminal, a mobile station, a mobile terminal, a subscriber station, a portable subscriber station, a user equipment, an access terminal, etc.

In this specification, a base station (BS) may refer to an access point (AP), a radio access station (RAS), a node B, an evolved NodeB (eNodeB), a base transceiver station (BTS), a mobile multihop relay (MMR)-BS, etc., and may include all or part of the functions of a base station, an access node, a radio access station, a Node B, an eNodeB, a base transceiver station, an MMR-BS, etc.

Figure 1 is a diagram showing a conventional wireless communication system configuration.

Referring to FIG. 1, the conventional wireless communication system (1) of the present invention includes a terminal (10), a base station (20), a core network (300), and an application server (400).

In a wireless communication system according to a comparative example of the present invention, a terminal (10) includes a physical layer (PHY), a MAC layer, an IP layer, a TCP/IP layer, and an application layer.

The terminal (10) is assigned an IP address from the core network (300) upon initial connection and communicates with the external Internet based on its own IP address.

The terminal (10) specifies an external server (400) with which communication must be performed and transmits and receives data via the TCP/IP protocol.

In a conventional wireless communication system (1), a terminal (10) requires data processing capability to communicate with an application server (400) in the application layer, and uses a TCP/IP layer to control data flow.

That is, in the conventional wireless communication system (1), the terminal (10) further includes, in addition to the physical layer (PHY) and the MAC layer, an IP layer for assigning a terminal IP address, and a TCP/IP layer for communicating with the server (400). Accordingly, the manufacturing cost of the terminal (10) increases, and when the terminal (10) performs communication with the server (400) using the TCP/IP layer, there is a problem in that a load is generated on the terminal (10) if retransmission occurs.

Hereinafter, with reference to the drawings, a base station equipment according to an embodiment of the present invention and a data transmission control method of a terminal using the same will be described in detail.

Figure 2 is a schematic configuration diagram of a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 2, a wireless communication system (1000) includes a terminal (100), a base station (200), a core network (300), and a server (400).

The base station (200) controls data transmission and reception for a plurality of terminals (100). For downlink (DL) data, the base station (200) transmits downlink scheduling information to inform the corresponding terminal (100) of the time/frequency domain in which the data will be transmitted, encoding, data size, HARQ (Hybrid Automatic Repeat and reQuest) related information, etc.

In addition, for uplink (UL) data, the base station (200) transmits uplink scheduling information to the corresponding terminal (100) to inform the terminal (100) of the time/frequency domain, encoding, data size, HARQ-related information, etc. that can be used.

The base station (200) includes a terminal communication layer (210) and a server communication layer (220).

The terminal communication layer (210) is a device for managing the terminal (100) using the unique identification information of the terminal (100) and performing a wireless communication function with the terminal (100).

The terminal communication layer (210) includes a physical layer (PHY) that performs wireless communication functions including modulation and coding, and a media access control layer (MAC) that performs wireless access functions.

The PHY layer provides information transfer services to the upper layer using the physical channel. The PHY layer is connected to the MAC layer above it through the transport channel. Data is transferred between the physical layers of the transmitter and receiver through the physical channel.

The MAC layer provides services to the upper layer, the Radio Link Control (RLC) layer, through logical channels. The RLC layer can also be implemented as a functional block within the MAC layer.

The terminal communication layer (210) can receive terminal identification information, identification information of an application server (400) that must transmit data of the terminal (100), and data transmitted from the terminal (100) by using a wireless bearer method via the MAC layer when the terminal (100) is initially connected.

And the terminal communication layer (210) can also transmit a control signal of the application server (400) to the terminal (100) using a wireless bearer method through the MAC layer.

The server communication layer (220) is connected to the terminal communication layer (210) and transmits data received from the terminal to the server (400).

The server communication layer (220) includes an Internet Protocol (IP) layer for assigning an IP from a core network using identification information of a terminal (100), a TCP/IP layer for transmitting data of a terminal received in the terminal communication layer to a server using transmission control protocol (TCP), and an application layer including an application program using a network.

FIG. 3 is a diagram showing the configuration of a wireless communication system according to an embodiment of the present invention.

The base station (200) manages the terminal (100) using the unique identification information of the terminal (100) and can be configured to be interoperable with an external server (400) based on the unique identification information of the terminal.

Referring to FIG. 3, in a wireless communication system (1000) according to one embodiment of the present invention, a base station (200) communicates with a terminal (100) using a radio bearer method using L1 and L2 layers to receive terminal (100) identification information, terminal (100) server identification information, and terminal (100) data. In addition, cell specific information (Cell specific ID) can be transmitted to the terminal (100).

First, the terminal (100) transmits an RRC connection request message to the base station (200) to request an RRC connection for data transmission. The RRC connection request message may include a message type, a terminal identifier (Initial UE identify), and server information.

The terminal identifier (Initial UE identify) can use the International Mobile Station Identification (IMSI), Temporary Mobile Station Identification (TMSI), or C-RNTI.

Next, the base station (200) transmits an RRC connection setup message including information necessary for the terminal (100) to establish an RRC connection with the base station (200), thereby allocating SRB (Signaling Radio Bearer) configuration resources to be exclusively used by the terminal (100).

The terminal (100) receives a connection setup message to establish an RRC connection with the base station (200), and transmits an RRC connection setup complete message to notify completion of the RRC connection.

When the base station (200) receives an RRC connection setup completion message from the terminal (100), it transmits an initial terminal message (Initial UE Message) containing terminal identifier (Initial UE identify) information for identifying the terminal within the base station to the core network (300) to be assigned an IP address of the terminal (100).

The core network (300) allocates an IP address of the terminal (100) and transmits an Initial Context Setup Request message including the allocated IP address information to the base station (200).

The base station (200) stores the IP address of the terminal (100) allocated from the core network (300) so that it corresponds to the terminal identification information stored when receiving an RRC connection request message.

Thereafter, the terminal (100) transmits data to be transmitted to the server (400) to the base station (200). At this time, the terminal (100) and the base station (200) can communicate using a radio bearer method using L1 and L2 layers.

The base station (200) transmits data received from the terminal (100) to the server (400) via TCP/IP using the terminal IP address and identification information of the server to which the terminal (100) wishes to transmit.

In this way, the wireless communication system (1000) according to the present embodiment has only a physical layer (PHY) and a MAC layer in the terminal (100), and includes an IP layer for the base station (200) to be assigned a terminal IP address, and a TCP/IP layer for communicating with a server (400), thereby transmitting data of the terminal to the server, thereby reducing the load of the terminal (100) and reducing the manufacturing cost of the terminal (100).

FIG. 4 is a flowchart of a service request procedure for data transmission between a terminal and a base station in a wireless communication network according to one embodiment of the present invention.

Referring to FIG. 4, the terminal (100) performs a predetermined procedure to transmit data to the base station (200). Specifically, the terminal (100) transmits an RRC connection request message to the base station (200) (S110). Through the process of the terminal (100) transmitting the RRC connection request message to the base station (200), the terminal (100) can request an RRC connection for data transmission.

The RRC connection request message contains message type, terminal identifier (Initial UE identify), and server information. may include:

The terminal identifier (Initial UE identify) can use the International Mobile Station Identification (IMSI), Temporary Mobile Station Identification (TMSI), or C-RNTI.

Server information may be pre-encrypted in response to a terminal identifier to reduce the load of the application layer stage where the terminal (100) selects and transmits the server (400). In addition, the server information may be modified by the user application or the server.

The base station (200) stores the terminal identifier and server information in the memory (S120). Then, the base station (200) transmits an RRC connection setup message including information necessary for the terminal (100) to establish an RRC connection with the base station (200) (S130).

The base station (200) transmits an RRC connection setup message to the terminal (100), thereby allocating SRB (Signaling Radio Bearer) configuration resources to be exclusively used by the terminal (100).

The RRC connection setup message can store cell specific identification information (cell specific ID) (S140).

This message is transmitted through SRB 0 and the CCCH (Common Control Channel), which is a logical channel. Since the uplink/downlink radio resources of the terminal (100) are controlled by the base station (200), the terminal (100) uses the radio resources by using the SRB configuration allocated through the RRC connection setup message.

The terminal (100) receives an RRC connection setup message, establishes an RRC connection with the base station (200), and transmits an RRC connection setup complete message (RRC connection setup complete message) (S150).

The terminal (100) notifies the completion of the RRC connection by transmitting an RRC connection setup completion message to the base station (200) through SRB 1 and a DCCH (Dedicated Control Channel). The Attach Request message transmitted from the NAS layer is transmitted to the base station (200) through the Dedicated NAS Information field (DedicatedInfoNAS) of this message when the RRC connection setup completion message is transmitted for efficient transmission.

When the base station (200) receives an RRC connection setup completion message from the terminal, it transmits an initial UE message to the core network (300) to be assigned an IP address of the terminal (100) (S160).

The base station (200) transmits an Attach Request to the core network (300) through an Initial UE Message. The Attach Request message can be transmitted in the NAS-PDU field of the Initial UE Message.

The initial UE message may include a terminal identifier (Initial UE identify) for identifying the terminal (100) within the base station (200).

The core network (300) allocates an IP address of the terminal (100) and transmits an Initial Context Setup Request message including the allocated IP address information to the base station (200) (S170).

The core network (300) transmits an Attach Accept message containing the IP address of the assigned terminal to the base station (200) in response to the Attach Request message transmitted by the base station (200).

The Attach Accept message may include GUTI, TAI list, EPS Bearer ID, UE-AMBR value, and QoS parameter information allocated by the core network.

The base station (200) stores the terminal IP address included in the initial context setup request message transmitted from the core network (300) (S180).

At this time, the base station (200) stores the terminal IP address together with the terminal identification information stored in step S120 and the transmission target server information to which the stored data corresponding to the terminal identification information must be transmitted.

The base station (200) transmits an RRC connection reconfiguration message (S190) to perform an RRC connection reconfiguration procedure.

After performing RRC connection reconfiguration, the terminal (100) transmits an RRC connection reconfiguration complete message (S200).

After signaling transmission and reception as above, the terminal (100) can transmit data to the base station (200).

The configuration for transmitting and receiving data from a terminal (100) to a base station (200) is described below with reference to FIG. 5.

FIG. 5 is a flowchart showing a data processing method of base station equipment according to one embodiment of the present invention, showing the data processing method of base station equipment of FIG. 1.

Referring to Fig. 5, the terminal (100) transmits data of the terminal (100) to the base station (200). The data may be a type of sensor data that senses at least one external environment. The terminal (100) may communicate with the base station (200) using a wireless bearer method using L1 and L2 layers.

The base station (200) can control communication errors by using an automatic repeat request (ARQ) method. The base station (200) can check whether an error has occurred using error detection information attached to the data, and transmit a positive acknowledgement (ACK) or negative acknowledgement (NACK) message to the terminal (100) (S211). If reliable data is not transmitted, the terminal (100) can retransmit the data to the base station (200) (S212).

The base station (200) can transmit sensing data received from the terminal (100) to the server (400) using the TCP/IP layer.

The server (400) can detect data errors received from the base station (200) using a TCP/IP-based data verification method, and if there is an error in the data, can transmit a data retransmission message to the base station (200) (S221). When the base station (200) receives the data retransmission message, it retransmits the sensing data to the server (400) (S222).

The server (400) can analyze the received sensing data and generate control data for controlling the terminal (100) based on the value of the sensing data.

The server (400) transmits control data to the base station (200) using the TCP/IP layer (S230). The base station (200) detects an error in data received from the base station (200) using a TCP/IP-based data verification method, and if there is an error in the data, can transmit a data retransmission message to the server (400) (S221). When the server (400) receives the data retransmission message, it retransmits the control data to the base station (200) (S222).

Finally, the base station (200) can transmit control data received from the server (400) to the terminal (100) through a radio bearer method using L1 and L2 layers.

The terminal (100) can control communication errors by using an automatic repeat request (ARQ) method. The terminal (100) can check whether an error has occurred using error detection information attached to the data, and transmit a positive acknowledgement (ACK) or negative acknowledgement (NACK) message to the base station (200) (S241). If reliable data is not transmitted, the base station (200) can retransmit control data to the terminal (100) (S242).

The embodiments of the present invention described above are not implemented only through devices and methods, but may also be implemented through a program that realizes a function corresponding to the configuration of the embodiments of the present invention or a recording medium on which the program is recorded.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the following claims also fall within the scope of the present invention.

Claims (20)

As a method for a base station to control data for a terminal,
A step of receiving an RRC connection request message including terminal identification information from a terminal connected through a radio bearer created using a physical layer and a medium access control layer;
A step of transmitting an RRC connection setup message including cell specific ID information to the terminal;
A step of transmitting an initial UE message including the above terminal identification information to the core network;
A step of receiving an initial context setup request message including a terminal IP address allocated from the above core network;
A step of storing the terminal IP address corresponding to the terminal identification information;
A step of receiving data transmitted from the terminal through a wireless bearer using the above base station identification information, and
A step of transmitting the data to the destination server using the terminal IP address corresponding to the terminal identification information of the terminal that transmitted the data.
A data control method including: In paragraph 1,
The above RRC connection request is
A data control method further comprising identification information of the above server. In paragraph 1,
The step of transmitting the above data to the destination server is
A data control method that transmits data using TCP/IP (Transmission Control Protocol/Internet Protocol). In paragraph 1,
A step of receiving control data from the above server, and
A data control method further comprising the step of transmitting the above control data to the terminal. In Article 4,
The step of receiving control data from the above server is
A data control method for receiving the above control data via TCP/IP (Transmission Control Protocol/Internet Protocol). delete As a base station that manages data transmission of terminals,
A terminal communication layer that communicates with a terminal through a radio bearer created using the physical layer and the media access control layer, and
A server communication layer is included that transmits uplink data received from the terminal to a destination server through the terminal communication layer using the terminal IP address of the terminal allocated in the core network, and transmits downlink data transmitted from the server to the terminal communication layer.
The above terminal communication layer is
Receive an RRC connection request message including terminal identification information from the terminal connected through the wireless bearer,
A base station that transmits an RRC connection setup message including cell specific ID information to the terminal. In Article 7,
The above RRC connection request is
A base station further comprising identification information of the above server. In Article 7,
The above server communication layer is
IP layer that allocates the terminal IP address from the above core network,
The TCP/IP layer that transmits the uplink data received from the terminal communication layer to the server using the Transmission Control Protocol (TCP).
A base station that contains an application layer that includes applications that use the network. delete As a base station that manages data transmission of terminals,
A communication unit that performs data transmission and reception with the terminal and the server.
A memory storing a program for managing data transmission of the above terminal;
Including the above communication unit and a processor that executes the operation implemented in the above program in conjunction with the above memory,
The above processor
When an RRC connection request message including terminal identification information is received from a terminal connected through a radio bearer created using a physical layer and a medium access control layer, an RRC connection setup message including base station identification information (Cell specific ID) information is transmitted to the terminal,
Transmitting an initial UE message including the terminal identification information to the core network, receiving an initial context setup request message including a terminal IP address allocated from the core network, and storing the terminal IP address in response to the terminal identification information;
A base station, which is implemented to transmit data transmitted from the terminal through a wireless bearer using the base station identification information, to a server as a destination by using the terminal IP address corresponding to the terminal identification information of the terminal that transmitted the data. In Article 11,
The base station, wherein the RRC connection request further includes identification information of the server. delete delete In Article 11,
The above communication department
Receive the data from the terminal through the wireless bearer,
A base station that transmits the above data to the server via TCP/IP (Transmission Control Protocol/Internet Protocol). In Article 11,
The above communication department
Receive control data from the above server,
A base station that wirelessly transmits the above control data to the terminal. In Article 16,
The above communication department
Receive the control data from the above server via TCP/IP (Transmission Control Protocol/Internet Protocol),
A base station that wirelessly transmits the above control data to the terminal via the wireless bearer. As a terminal that transmits and receives data with a server through a base station,
A base station implementing an IP layer and a TCP/IP layer for the above terminal, and a communication unit communicating using a physical layer and a media access control layer,
Memory that stores programs for transmitting data;
Including the above communication unit and a processor that executes the operation implemented in the above program in conjunction with the above memory,
The above processor
By transmitting an RRC connection request message including terminal identification information to the base station connected through the radio bearer generated using the physical layer and the medium access control layer, an RRC connection setup message including base station identification information (Cell specific ID) information is received from the base station,
A terminal implemented to transmit uplink data to be transmitted to a destination to the base station through a wireless bearer using the above base station identification information, and to receive downlink data transmitted from the destination from the base station. In Article 18,
The above uplink data is
A terminal that transmits to the server using the IP layer and the TCP/IP layer included in the base station. In Article 18,
The above communication department
A terminal that receives downlink data transmitted from the base station through the physical layer and the medium access control layer.

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