KR20120028197A - Group control method for machine type communication and mobile communication system using the method - Google Patents

Abstract

PURPOSE: A group control method for an object communication service and a mobile communication system using the same are provided to control an MTC device in a 3GPP LTE-Advanced system. CONSTITUTION: A BS(Base Station) allocates an MTC_RNTI(Machine Type Communication_Radio Network Temporary Identifier) to an MTC group identifier(S304). The BS includes an access acceptance message in an RRC(Radio Resource Control) connection reconfiguration message. The BS transmits the RRC connection reconfiguration message to an MTC device(S305). The MTC device is connected to the BS(S306).

Description

Group control method for IoT service, and mobile communication system using the same {Group Control Method for Machine Type Communication and Mobile Communication System Using the Method}

The present invention relates to a group control method for an IoT service, and a mobile communication system using the same, and more particularly, to control an MTC group including a plurality of MTC devices in a 3GPP LTE-Advanced based mobile communication system. A group control method for a service, and a mobile communication system using the same.

Machine type communication or machine to machine communication refers to a form of data communication associated with one or more entities for which human intervention is not necessary. Services optimized for IoT are different from services optimized for human-to-human communications, including: a) different market scenarios, b) data communications, c) lower cost and effort, and d) a very large number of potential communications. Terminals, e) differ from current mobile network communications in that they relate to characteristics such as very little traffic per terminal, up to a large range.

IoT can appear in various forms of services, for example, smart metering, tracking & tracing, remote maintenance & control, eHealth, and the like.

Recently, 3GPP is also progressing MTC (Machine Type Communication) standardization for intelligent communication between people and objects, and between objects and objects. A large number of MTC devices are deployed and operated for various MTC applications, such as smart metering and remote control.

In the 3GPP LTE system, both the MTC device and the general user are treated as one terminal (terminal), and therefore, the MTC device must be individually registered in the LTE network. The deployment of multiple MTC devices has a negative effect on the existing general user by causing scheduling competition for channel allocation, exhaustion of radio resources, and overload due to signal generation. At 3GPP, standardization is underway with a focus on minimizing the adverse impact of MTC device placement.

On the other hand, the operator may bundle a plurality of devices of the same type in a group and manage them in common for the convenience of the operator due to the nature of the MTC device. By grouping and managing MTC devices in MTC group, there are many advantages such as device control, management, or charging, and it can reduce signal overload compared to individual terminal control, especially when there are many MTC devices, saving network resources.

Currently, 3GPP is selecting the concept of grouping and managing MTC devices into MTC group and deriving the requirements, but no effective solution is presented.

Accordingly, the present invention is to solve the above problems, a method for allocating an MTC device to an MTC group in a 3GPP LTE-Advanced-based mobile communication system and using the same to control the MTC device belonging to the MTC group An object of the present invention is to provide a group control method for a communication service and a mobile communication system using the same.

According to an aspect of the present invention, there is provided a group control method for an IoT service. The at least one IoT communication device is classified into at least one IoT communication group, and the IoT communication group is assigned to each IoT communication group. Assigning an identifier, setting an MTC temporary temporary identifier (MTC_RNTI) for each MTC group identifier, and using the MTS temporary identifier for addressing the MTC device belonging to the MTC group It includes.

The classifying the at least one IoT communication device into at least one IoT communication group and assigning an IoT communication group identifier to each IoT communication group may include: a mobility management apparatus receiving an access request from a terminal; Determining whether the communication device is a thing group or not, and if it is determined that the terminal requesting the connection is a thing communication device, the mobility management apparatus accepts the connection to the base station by including the thing communication group identifier in a connection accept message. Sending a message.

The step of setting the temporary communication IOT wireless network identifier for each MTC group identifier, the base station receives a connection acceptance message including the ICT group identifier from the network, the IoT communication temporary identifier for each IoT communication group identifier And allocating mapping information of the MTC group identifier and the temporary ID of the wireless network to the MTC device.

The mapping information of the MTC identifier and the temporary ID of the wireless network may be transmitted through an RRC connection reconfiguration message.

The setting of the IoT communication temporary identifier by each IoT communication group identifier may include registering the IoT communication group identifier as an identifier of the IoT communication group by the IoT communication device having received the IoT communication temporary identifier. It may further include.

The step of using the MTS temporary identifier for addressing the MTC device belonging to the MTC group may include: transmitting, by a base station, a paging including the MTC group identifier and paging record information; and receiving the paging message. At least one MTC device in the corresponding MTC group obtaining record information corresponding to the MTC group identifier, and the base station receives downlink data addressed as the MTC temporary identifier for the MTC group. And transmitting, by the at least one MTC device within the MTC group, receiving downlink data addressed by the MTC temporary identifier.

In the group control method for the MTC service, after the predetermined time from the transmission of the paging message, the base station receives the transmission time so that the downlink data transmission can be performed within the reception window time of the MTS temporary identifier. It is characterized by controlling the time.

A mobile communication system according to another aspect of the present invention is a mobile communication system for performing group control for a machine type communication (MTC) service, and classifying at least one MTC device into at least one MTC group, A mobility management device (MME) for assigning an IoT communication group identifier to each IoT communication group and an IoT communication temporary identifier (MTC_RNTI) for each IoT communication group identifier, and for the IoT communication device belonging to the IoT communication group. It may include a base station using the MTS temporary identifier for addressing.

A base station according to another embodiment of the present invention is a base station that communicates with a network and at least one IoT communication device, receives an IoT communication group identifier from a network, and uses the MTC_RNTI for each IoT communication group identifier. ) And use the MTS temporary identifier for addressing the MTC device belonging to the MTC group.

The base station uses a wireless network temporary identifier distinguished for each IoT communication device when the communication between the base station and the IoT communication device is in a one-to-one mode, and uses the IoT communication network when the communication between the base station and the IoT communication device is in the IoT communication group mode. Addressing can be done using temporary identifiers.

According to the configuration of the present invention, in the 3GPP LTE-Advanced system, it is possible to collectively control the MTC devices into MTC groups. Therefore, there is an advantage in that it is possible to reduce the control of the network for the MTC device and save wired and wireless resources.

1 is a diagram illustrating a wireless communication network providing a communication service according to the present invention.
2 is a diagram illustrating a general register process using an attach.
3 is a diagram illustrating an MTC group designation procedure of an MTC device according to an embodiment of the present invention.
4 is a diagram illustrating a general data transfer method for controlling MTC devices one by one according to an embodiment of the present invention.
5 is a diagram illustrating a data transfer method in the case of applying an MTC group control method according to an embodiment of the present invention.
6 is a diagram for explaining a method of controlling an MTC group mode according to one embodiment of the present invention;

As the 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. Like reference numerals are used for like elements in describing each drawing.

The terms first, second, A, B, etc. may be used to describe various elements, but the elements 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. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is said to be "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that another component may exist 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 are not construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

As used herein, the term 'terminal' includes a mobile station (MS), a user equipment (UE), a user terminal (UT), a wireless terminal, an access terminal (AT), a terminal, a subscriber unit, A subscriber station (SS), wireless device, wireless communication device, wireless transmit / receive unit (WTRU), mobile node, mobile or other terms may be referred to. Various embodiments of the terminal may be used in various applications such as cellular telephones, smart phones with wireless communication capabilities, personal digital assistants (PDAs) with wireless communication capabilities, wireless modems, portable computers with wireless communication capabilities, Devices, gaming devices with wireless communication capabilities, music storage and playback appliances with wireless communication capabilities, Internet appliances capable of wireless Internet access and browsing, as well as portable units or terminals incorporating combinations of such functions However, the present invention is not limited thereto.

As used herein, a 'base station' generally refers to a fixed point for communicating with a terminal, and includes a base station, a Node-B, an eNode-B, and a BTS. It may be called other terms such as a transceiver system, an access point.

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

1 illustrates a wireless communication network providing a communication service for the present invention to which the present invention is applied.

As shown in FIG. 1, a wireless communication network providing an MTC service includes an MTC server 300, an MTC device 110, and an MTC user (for providing MTC service) in addition to an existing wireless communication network including a general terminal 100. 400) and the like.

The MTC device 110 is a terminal (UE) having an MTC communication function for communicating with the MTC server 300 and other MTC devices through a Public Land Mobile Network (PLMN).

The MTC server 300 communicates with the PLMN and communicates with the MTC device 110 via the PLMN. The MTC server 300 also has an interface accessible by the MTC user and provides a service for the MTC user 400. The MTC user 400 uses a service provided by the MTC server 300.

In the configuration of FIG. 1, the MTC server 300 is controlled by a network operator, the network operator provides an application programming interface (API) on the MTC server, and the MTC user 400 is connected to the MTC server of the network operator through the API. Access.

In FIG. 1, the MTC server is included in the network operator domain. However, the MTC server may be located outside the network operator domain without being located in the network operator domain. In this case, the MTC server is not controlled by the network operator. It does not have a form.

In addition, the MTC device 110 should be through a base station (not shown) in order to communicate with the MTC server 300 and the like located in the network, the base station according to an embodiment of the present invention, the thing communication for each IoT communication group identifier The temporary network identifier (MTC_RNTI) may be set, and the MTS temporary identifier may be used for addressing the MTC device belonging to the MTC group.

2 illustrates a general register process using an attach.

In order to access a wireless communication network and receive a service, a terminal must be registered in the network. FIG. 2 shows a general register process of a terminal using a connection.

For the register procedure of the terminal, the base station 200 and the MME 500 in the network is in charge of the procedure. Here, the MME 500, which is a mobility management entity, is a control node that processes signaling between a terminal and a core network (CN). The main functions provided by the MME include bearer management related functions and connection management related functions.

The network includes a database as a means for register procedures. The access request S201 from the general terminal 100 is transmitted to the MME 500 through the base station (S202), and the MME 500 of the network receiving the response responds with the access acceptance (S203 and S204). In this process, an RRC connection reconfiguration (RRC) connection is performed between the terminal 100 and the base station 200 (S204 and S205), and an initial context setting is performed between the base station 200 and the MME 500. (Initial Context Setup) is performed together (S203 and S206). The terminal receiving the access acceptance transmits the access completion message to the network (S207, S208) to inform that the access process is completed successfully.

The network defines the state of the terminal which has completed the connection to the network as "REGISTERED" and manages all subsequent contexts. However, in the process illustrated in FIG. 2, when the terminal is an MTC device, the procedure of designating the MTC group is not shown.

3 illustrates an MTC group designation procedure of an MTC device according to an embodiment of the present invention.

When an arbitrary terminal transmits an access request to the network (S301 and S302), the network determines that the terminal is an MTC device and an MTC group. If it is determined that the terminal transmitting the access request is the MTC device, the MME 500 responds by including the MTC group identifier (MTC_group_id) in the access accept message (S303). The base station 200, which receives the access acceptance from the MME 500, allocates MTC_RNTI (thing communication radio network temporary identifier) for each MTC group identifier (S304). That is, rather than allocating C_RNTI for each terminal, MTC_RNTI is allocated for each MTC group.

The base station 200 transmits the connection acceptance message including the MTC_RNTI and the MTC group identifier MTC_group_id allocated for each MTC group in the RRC connection reconfiguration message to the MTC device 110 (S305). The MTC device 110 receiving this registers the MTC group identifier as its ID and uses it for future control.

As such, according to an exemplary embodiment of the present invention, an MTC group identifier (MTC_group_id) is assigned to an MTC terminal. In addition, it is possible to collectively control the MTC device through the MTC group control by giving MTC_RNTI (Radio Network Temporary Identifier) to the MTC group. Downlink reception of the 3GPP LTE-Advanced system is performed based on a physical downlink control channel (PDCCH) control channel. The PDCCH is configured to address a specific RNTI, and a terminal capable of receiving the RNTI receives data (signal message or traffic) through an associated Physical Downlink Shared CHannel (PDSCH).

Subsequent transmission of the RRC connection reconfiguration complete (S306), initial context setup response (S307), and connection complete (S308, S309) message is the same as the procedure shown in FIG.

4 illustrates a general data transfer method of controlling MTC devices one by one according to an embodiment of the present invention.

In FIG. 4, each UE receives only C_RNTI addressed to itself with its own C_RNTI and receives PDSCH (Physical Downlink Shared CHannel) data associated therewith, ie, UE A receives C_RNTI (a) addressing. UE B receives data through C_RNTI (b) addressing, and UE C receives data through C_RNTI (c) addressing, thus, the base station allocates PDCCH and PDSCH as many as the number of UEs it manages. In this case, according to a preferred embodiment of the present invention, each terminal means an MTC device.

5 is a diagram illustrating a data transfer method when an MTC group control method according to an embodiment of the present invention is applied.

MTC devices designated as MTC groups have the same MTC_RNTI. If a plurality of MTC devices can receive the same RNTI, it is not necessary to receive the data transmitted from the base station as in the unit terminal. That is, as shown in FIG. 5, the MTC device A, the MTC device B, and the MTC device C are not given separate RNTIs but are given and addressed with the same MTC_RNTI (m). System broadcast or paging may be a preferred embodiment in which MTC group addressing using MCT_RNTI may be used.

The base station 200 is a subject that manages the RNTI of the cell, that is, the radio network temporary identifier. The base station maps MTC_RNTI to the MTC group identifier (MTC_group_id). If the MTC group identifier (MTC_group_id) is the first input to the base station, the base station allocates and maps a new MTC_RNTI. If the MTC group identifier (MTC_group_id) and the MTC_RNTI mapping relationship are already set, no new operation is required.

The MTC group identifier and MTC_RNTI mapping information are delivered through an RRC Connection Reconfiguration message. Upon receiving the RRC connection reconfiguration message, the UE registers the MTC_RNTI in the RNTI combination that it can receive and uses it appropriately for future message reception. As described above, according to the preferred embodiment of the present invention, the MTC device may be assigned by specifying MTC_RNTI.

However, the RNTI received by the MTC device is not the only MTC_RNTI. Before the access request is delivered, the UE is assigned C_RNTI through an RRC connection establishment process. Thus, control of the MTC device is possible in one-to-one mode and MTC group mode.

In the one-to-one mode, the base station can control the MTC device using C_RNTI as shown in FIG. 4 and MTC_RNTI in the MTC group mode. As described above, it is another embodiment of the present invention that the device can be controlled in parallel with the RNTI.

That is, according to an embodiment of the present invention, when the communication between the base station and the MTC device is in a one-to-one mode, a wireless network temporary identifier distinguished for each MTC device is used, and the communication between the BS and the MTC device is the MTC group. In the mode, addressing may be performed using the MTS temporary identifier.

6 is a diagram illustrating a method of controlling an MTC group mode according to an embodiment of the present invention.

In view of MTC device characteristics, in most cases, MTC devices do not communicate with the network continuously. Therefore, in most cases, the RRC connection state between the MTC device and the base station is congested to an idle state. MTC group mode control is based on controlling without considering each RRC state of the MTC device.

Accordingly, the base station sends paging to the MTC group as shown in FIG. 6 to wake up the MTC device in the MTC group (S601). In the case of FIG. 6, the MTC devices 1 to MTC device k belong to one MTC group, and the base station 200 wakes up the MTC devices 1 to MTC device k through one paging message including a common MTC group identifier. .

The paging message includes paging record information for the MTC group identifier. Upon receiving the paging message, the MTC device receives record information corresponding to its MTC group identifier and performs network access or downlink data according to the contents (S602). In the case of network access, a conventional random access procedure is followed. When receiving downlink data, the PDCCH addressed to the MTC_RNTI is received and the PDSCH data indicated by the PDCCH is received (S602).

In consideration of power saving of the MTC device communication module, the base station controls the transmission time and the reception time of the MTC device so that downlink data transmission can be performed at a MTC_RNTI reception window time after a predetermined time from the transmission of the paging message. As described above, it is another embodiment of the present invention that the MTC group can be controlled through the MTC group mode control.

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

Claims (18)

A group control method for providing a machine type communication (MTC) service in a mobile communication network including a mobility management device, a base station, and at least one MTC device,
Classifying at least one IoT communication device into at least one IoT communication group, and assigning an IoT communication group identifier to each IoT communication group;
Setting a MTC_RNTI for each MTC group identifier; And
And using the IoT wireless network temporary identifier for addressing an IoT communication device belonging to an IoT communication group. The method according to claim 1,
Categorizing the at least one MTC device into at least one MTC group, and assigning an MTC group identifier to each MTC group,
Determining, by the mobility management device, that the access request from the mobile terminal is a thing communication device and a thing communication group of the terminal; And
If it is determined that the mobile terminal requesting the connection is a thing communication device, the mobility management apparatus includes a thing communication service comprising the step of transmitting a connection acceptance message to the base station by including the communication group identifier in the connection acceptance message (accept) message; Group control method. The method according to claim 1,
The step of setting the MTS temporary identifier for each MTC group identifier may include:
Receiving, by the base station, a connection acceptance message including the MTC group identifier from the network;
Allocating the MTS temporary identifier for each MTC group identifier; And
And transmitting the mapping information of the MTC group identifier and the MTS temporary identifier to the MTC device. The method according to claim 3,
The mapping information of the MTC group identifier and the MTC temporary identifier is transmitted through an RRC connection reconfiguration message. The method according to claim 3,
The step of setting the MTS temporary identifier for each MTC group identifier may include:
And registering, by the IoT device receiving the IoT communication group identifier and the IoT communication temporary identifier, its IoT communication group identifier as its own identifier. The method according to claim 1,
Using the IoT wireless network temporary identifier for addressing the IoT communication device belonging to the IoT communication group,
Transmitting, by the base station, a paging including the telecommunication group identifier and the paging record information;
Acquiring, by the at least one MTC device within the corresponding MTC group, which has received the paging message, record information corresponding to the own MTC group identifier;
Transmitting, by a base station, the downlink data addressed to the MTC temporary identifier for the corresponding MTC group; And
And receiving, by at least one IoT communication device in the IoT communication group, downlink data addressed to the IoT wireless network temporary identifier. The method of claim 6,
After the predetermined time from the transmission of the paging message, the base station to the transmission time, the MTC device controls the reception time so that the downlink data transmission can be made within the reception window time of the MTS temporary identifier. The group control method for the IoT service. A mobile communication system performing group control for a machine type communication (MTC) service,
A mobility management apparatus (MME) for classifying at least one IoT communication device into at least one IoT communication group and assigning an IoT communication group identifier to each IoT communication group; And
And a base station configured to set the MTC_RNTI for each MTC group identifier and to use the MTS temporary identifier for addressing the MTC device belonging to the MTC group. The method according to claim 8,
The mobility management apparatus determines whether the MTC device of the corresponding terminal receiving the connection request from the terminal and the MTC group, and if it is determined that the terminal requesting the connection is the MTC device, in the connection acceptance message And a connection accept message to the base station, including the group identifier. The method according to claim 8,
The base station receives a connection acceptance message including the MTC group identifier from the mobility management device, allocates the MTC temporary identifier for each MTC group identifier, and assigns the MTS group identifier and the MTS temporary network And the mapping information of the identifier is transmitted to the MTC device. The method according to claim 10,
And a MTC device receiving the MTC group identifier and the MTC temporary identifier, and registering the MTC group identifier as its own identifier. The method of claim 11,
The base station transmits a paging including the IoT communication group identifier and the paging record information, and transmits downlink data addressed to the IoT radio temporary identifier for the corresponding IoT communication group.
At least one IoT communication device in the corresponding IoT communication group receives the paging message to obtain record information corresponding to the own IoT communication group identifier, and receives the downlink data addressed by the IoT communication temporary identifier by using the same. Characterized in that, the mobile communication system. The method of claim 12,
After the predetermined time from the transmission of the paging message, the base station to the transmission time, the MTC device controls the reception time so that the downlink data transmission can be made within the reception window time of the MTS temporary identifier. Mobile communication system. A base station in communication with a network and at least one telecommunications device,
Receives the IoT communication group identifier from the network, sets the IoT communication temporary identifier (MTC_RNTI) for each IoT communication group identifier, and uses the IoT communication temporary identifier for addressing the IoT communication device belonging to the IoT communication group. Base station. The method according to claim 14,
The base station receives a connection acceptance message including the MTC group identifier from the network, allocates the MTC temporary identifier for each MTC group identifier, and assigns the MTC group identifier and the MTS temporary identifier. Transmitting mapping information of the to the MTC device. The method according to claim 15,
The base station is characterized in that for transmitting the mapping information of the MTS group identifier and the MTS temporary identifier through an RRC connection reconfiguration message. The method according to claim 14,
And transmitting the paging including the IoT communication group identifier and the paging record information to at least one IoT communication device, and transmitting downlink data addressed to the IoT radio temporary identifier for the corresponding IoT communication group. Base station. The method according to claim 14,
When the communication between the base station and the IoT communication device in a one-to-one mode, a wireless network temporary identifier distinguished for each IoT communication device is used, and when the communication between the base station and the IoT communication device is in the IoT communication group mode, the IoT communication temporary network identifier Performing addressing using a base station.

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