KR101767679B1 - Method and apparatus of providing machine type communication service in wireless communication system - Google Patents

Abstract

A method and apparatus for providing machine-type communication (MTC) services in a wireless communication system are provided. Wherein the MTC service providing method includes transmitting information of an MTC group to which the MTC apparatus belongs to the MTC apparatus, wherein the MTC group is a group of MTC apparatuses sharing one or more MTC features, Includes an identifier of the MTC group.

Description

Field of the Invention [0001] The present invention relates to a method and apparatus for providing a machine type communication service in a wireless communication system,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to wireless communication, and more particularly, to a method and apparatus for providing a machine-type communication (MTC) service in a wireless communication system.

The Global System for Mobile communication (GSM) is a wireless technology developed as a system for standardizing a wireless communication system in Europe. The General Packet Radio Service (GPRS) is a packet switched data service Is a technology for providing a packet switched data service. GPRS constitutes a GERAN (GSM / EDGE Radio Access Network). The Universal Mobile Telecommunication System (UMTS) is a wireless communication system based on Wideband Code Division Multiple Access (WCDMA). The Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) is a wireless communication system based on OFDMA (Orthogonal Frequency Division Multiple Access).

Machine-type communication (MTC) is a form of data communication that involves one or more entities that do not require human interaction. That is, the MTC refers to a concept in which a device other than a mobile station (MS) used by a person uses a network such as a conventional GERAN, UMTS, or LTE (Long-Term Evolution). The machinery used for the MTC can be called an MTC device, and the MTC device can be used for a vending machine, a machine for measuring the level of a dam. That is, MTC can be widely applied to various fields. Because MTC devices differ in characteristics from general terminals, MTC-optimized services may differ from services optimized for human-to-human communications. The MTC is characterized by different market scenarios, data communications, low cost and effort, potentially a very large number of communication terminals, a large service area and low per-terminal traffic compared to current mobile network communication services. .

On the other hand, the number of MTC devices is expected to be much larger than the number of legacy devices, and the operation of the MTC device is likely to proceed simultaneously to a plurality of MTC devices due to the typical M2M (Machine to Machine) service characteristic . Therefore, there is a possibility that there is a shortage of network resources, and a way to efficiently handle the network signaling load for the MTC device is very important. Accordingly, overload control for handling overload in core network signaling and radio access network (RAN) signaling has recently emerged as a top priority at MTC.

Various methods for overload control can be proposed. Although a method of restricting the connection of the MTC apparatus has been proposed so far in the case where the load on the network is more than necessary, a method of minimizing the signaling load may be proposed. Accordingly, a method of simultaneously grouping MTC devices and simultaneously signaling them to minimize the signaling load can be proposed. This can be referred to as MTC group handling.

When performing MTC group handling, information for efficient operation control of the MTC device needs to be defined.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and apparatus for providing a machine-type communication (MTC) service in a wireless communication system.

In an aspect, a method of providing a machine-type communication (MTC) service in a wireless communication system is provided. Wherein the MTC service providing method includes transmitting information of an MTC group to which the MTC apparatus belongs to the MTC apparatus, wherein the MTC group is a group of MTC apparatuses sharing one or more MTC features, And an identifier of the MTC group.

The information of the MTC group may be transmitted through a system information (SI) message of a GSM / EDGE Radio Access Network (GERAN).

The information of the MTC group may be added to the reset octets information of the SI 13 among the system information messages.

The information of the MTC group may be transmitted through a paging request message.

The information of the MTC group may be added to the third mobile identity information of the paging request type 2 message among the paging request messages.

The information of the MTC group may be added to the newly defined paging request type 4 message in the paging request message.

The information of the MTC group may include MTC access period information indicating a time range in which the MTC apparatus in the MTC group can access the network.

The information of the MTC group may include MTC access priority information indicating the access right to the network of the MTC group determined based on the network load.

The MTC group information may include an MTC offline indication period information indicating a threshold of a time when the MTC device in the MTC group can not connect to the network.

The threshold may be a periodic RAU (Routing Area Update) period.

The MTC service providing method may further include transmitting a General Packet Radio Service (GPRS) attach accept message and an RAU enable message to the MTC device.

The General Packet Radio Service (GPRS) attach accept message and the RAU grant message may include information of the MTC group.

In another aspect, a network operator is provided in a wireless communication system. Wherein the network operator includes a radio frequency (RF) unit configured to transmit information of an MTC group to which the MTC apparatus belongs to the MTC apparatus, and a processor coupled to the RF unit, wherein the MTC group shares one or more MTC characteristics And the information of the MTC group includes the ID of the MTC group.

In yet another aspect, an MTC apparatus is provided in a wireless communication system. Wherein the MTC apparatus includes an RF unit configured to receive information of an MTC group to which the MTC apparatus belongs, and a processor coupled to the RF unit and configured to process information of the MTC group, And the MTC group information includes an ID of the MTC group.

MTC group handling is performed to satisfy the service requirement of the MTC device, thereby ensuring efficient operation of the MTC device.

Figure 1 is an example of a communication scenario for MTC.
2 and 3 are examples of a conceptual diagram in which MTC devices communicate with an MTC server.
4 is an example of a conceptual diagram in which MTC devices communicate directly without an MTC server.
FIG. 5 shows an embodiment of a proposed MTC service providing method.
6 is another embodiment of the proposed MTC service providing method.
7 is a block diagram of a network operator and an MTC apparatus in which an embodiment of the present invention is implemented.

Machine-type communication (MTC) is a form of data communication that involves one or more entities that do not require human interaction. An MTC device is a terminal installed for MTC. The MTC device can communicate with an MTC server or with another MTC device. MTC features are network functions that optimize the network used by M2M (Machine to Machine) devices. An MTC server is an entity that communicates with a network and communicates with the MTC device through the network. The MTC server may have an interface that can be accessed by an MTC user. The MTC server provides services for MTC users. The MTC user uses the service provided by the MTC server. An MTC subscriber is an entity that has a contractual relationship with a network operator to service one or more MTC devices. An MTC group is a group of MTC devices that share one or more MTC characteristics and belong to the same MTC subscriber. MTC subscribers and MTC groups can be used in combination.

In the following, the network is illustratively described as a network based on a GSM / EDGE Radio Access Network (GERAN), but the present invention is not limited thereto and may be applied to various other types of networks such as UMTS Terrestrial Radio Access Network (UTRAN) or Evolved-UTRAN Lt; / RTI > network.

A mobile station (MS) is a general wireless device that is provided with a service based on a GERAN and includes a user equipment (UE), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT) device).

Figure 1 is an example of a communication scenario for MTC. The MTC apparatus 10 is connected to the network, that is, the GERAN 30, together with the existing terminal 20. The MTC server 40 receives the information of the MTC apparatus 10 via the GERAN 30 and provides the information to the MTC user 50. The MTC server 40 may be directly connected to the GERAN 40 or may be connected to the GERAN 40 via an IP (Internet Protocol).

Hereinafter, the uplink means communication from the MTC apparatus 10 or the terminal 20 to the GERAN 30 and the downlink means communication from the GERAN 30 to the MTC apparatus 10 or the terminal 20. [ do.

The above structure is merely an example, and can be changed into various forms. For example, the MTC apparatus 10 can directly communicate with another MTC apparatus without the MTC server 40. [

When the MTC apparatus 10 is placed in the GERAN 30, the traffic load on the GERAN 30 may be increased depending on the traffic characteristics of the MTC apparatus 10. [ This may cause a problem that the service for the existing terminal 20 may be deteriorated. Therefore, in order to reduce the traffic load due to the MTC apparatus 10, it is necessary to flexibly manage the resource allocation of the MTC apparatus 10 according to the traffic characteristics of the MTC apparatus 10 and / or current network congestion.

In MTC, MTC devices can communicate with one or more MTC servers, or MTC devices can communicate with each other.

2 and 3 are examples of a conceptual diagram in which MTC devices communicate with an MTC server. Referring to FIG. 2, the MTC server is controlled by a network operator. That is, the MTC server is located within the network operator domain. The network operator provides an API (Application Programming Interface) such as OSA (Open Systems Architecture) to the MTC server. The MTC user accesses the MTC server of the network operator through the API. Referring to FIG. 3, the MTC server is not controlled by the network operator. That is, the MTC server is located outside the network operator area, and the network operator provides network connectivity to the MTC server.

4 is an example of a conceptual diagram in which MTC devices communicate directly without an MTC server. Referring to FIG. 4, the network operator A and the network operator B are directly connected, and the MTC devices communicate with each other directly without the MTC server.

Not all MTC devices need to have the same characteristics because there can be MTC devices in various fields. That is, not all system optimizations need to be suitable for all MTC devices. The MTC characteristic is defined as to provide a structure for different system optimization possibilities that may occur. Such MTC characteristics may be provided on a subscription basis. In addition, the MTC characteristics can be activated individually.

In order for an MTC device to operate in an existing network, different service requirements are required from a legacy terminal. Service requirements include common service requirements and specific service requirements. Service requirements for MTC characteristics are described in 3GPP TS 22.368 V1.1.1 (2009-11) "3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Service requirements for machine-type communications; Stage 1 (Release 10) ".

The individual service requirements of the MTC characteristic are low mobility, time controlled, time tolerant, MTC monitoring, offline indication, jamming indication, priority Priority Alarm Message (PAM), extra low power consumption, secure connection, and the like. Hereinafter, among the various individual service requirements, the service requirements to be discussed in the present invention, such as time control, time tolerance, offline instruction, PAM, etc. will be described in detail.

1) Time controlled characteristic: The time control characteristic allows the MTC device to transmit or receive data only in a predefined specific interval. Thus, it is possible to prevent unnecessary signaling outside a predefined specific interval. The following conditions may be required to implement the time control characteristic.

- The network operator shall be able to accept connections such as data transmission or reception only for a specified period.

- The network operator should be able to change the access interval based on criteria such as daily traffic load.

- The network operator shall be able to share the changed access interval with the MTC device or the MTC user.

2) Time tolerant: The time tolerance allows the MTC device to delay data transfer. The following conditions may be required for implementation of time tolerance characteristics.

- The network operator restricts the connection of the MTC device to the network or the data transfer to another MTC device if the load of the network is larger than a predetermined load threshold and the data which can be transferred by the MTC device To be dynamically limited.

- The network operator must be able to predefine the load threshold per MTC subscription.

- The MTC device should be able to determine the load on the network.

3) Offline indication: The offline indication feature can be supported for MTC devices that require notification at the appropriate time when signaling between the MTC device and the network is no longer possible. The following conditions may be required for the implementation of the offline indication characteristic.

The system should be able to provide an efficient mechanism for detecting situations where signaling between the MTC device and the network is no longer possible.

- The network shall be able to notify the MTC server and / or MTC user immediately upon detecting a loss of connection.

 - The maximum value of offline indication detection time, which is the difference between the time when the actual connection is disconnected and the time when the connection is detected to be disconnected, shall be settable for each MTC subscription.

4) PAM: PAM characteristics can be supported for MTC devices that warn of preference in the event of an emergency, vandalism, or immediate attention. The following conditions may be required for implementation of PAM characteristics.

- PAM should take precedence over any other service requirement.

Overload control, on the other hand, has emerged as a top priority in the discussion on MTC in recent years. Of these individual service requirements, the time control characteristic is particularly related to the overload control. When the MTC apparatus is allowed to access the MTC apparatus only in a specific section by the network operator and the corresponding connection section is changed according to the update of the communication window of the network operator, the MTC apparatus transmits a NAS (Non-Access Stratum) Signaling can be initiated. At this time, the network may reject the request of the MTC device and return a new connection section as a response, accept the first connection outside the new connection section, and provide the connection section as a new connection section in the next connection. In addition, if the connection interval is changed, information on a new connection interval is given to the MTC device after the NAS signaling connection is established. Therefore, if the network rejects the request of the MTC device and the MTC device attempts to reconnect during the new access interval, at least the first signaling connection attempt is an unnecessary attempt if the access interval is changed for each MTC device. In addition, the number of MTC devices is likely to be much larger than the number of human-to-human (H2H) devices, and a one-to-one connection between the network and the MTC device may cause overloading of the network.

Accordingly, it is possible to reduce the load on the network by grouping a plurality of MTC devices into groups rather than treating each MTC device individually. Each MTC device belongs to the MTC group, and each MTC group is uniquely identified in GERAN. MTC devices having the same connection interval in the MTC group are distributed within the entire connection interval to reduce the signaling load. To meet this requirement, each MTC device may randomize its connection interval within the entire connection interval.

Hereinafter, a method of providing MTC service through MTC group handling is proposed. More specifically, the present invention proposes a method of providing an MTC service through a system information (SI) message or a paging request message. The MTC service that can be provided through the MTC group handling may include time tolerance characteristics, off-line indication characteristics, and PAM characteristics in addition to the time control characteristics described above. The current GERAN system information includes only information related to the operation control of the existing legacy terminal, and information that satisfies the service requirements with respect to the MTC apparatus is not defined. Also, the current GERAN paging request message includes only information related to circuit, packet, or Multimedia Broadcast and Multicast Service (MBMS) of an existing legacy terminal, and does not include information related to the MTC apparatus. Therefore, the present invention proposes a method for newly defining information necessary for MTC group handling in the system information or the paging request message.

First, a method of providing an MTC service through a system information message will be described.

FIG. 5 shows an embodiment of a proposed MTC service providing method.

In step S100, the network operator transmits a General Packet Radio Service (GPRS) attach accept message and an RAU (Routing Area Update) permission message to the MTC device. The GPRS attach permission message is a message that the MTC device receives from the network in an attempt to GPRS attach to the network. The RAU grant message is a message that the MTC device receives from the network as it attempts to RAU over the network. The GPRS attach permission message and the RAU grant message include MTC group information. More specifically, the MTC group information includes an MTC access period field, an MTC access priority field, and an MTC offline indication period field of the MTC group to which the corresponding MTC apparatus belongs . ≪ / RTI > Table 1 is an example of the MTC group information included in the GPRS attach permission message and the RAU permission message. The MTC group information in Table 1 may be included in the GPRS attach permission message and the RAU permission message.

IEI Information Element Presence Format Length MTC access period M V One MTC access priority M V One MTC offline indication period M V One

Each field in Table 1 will be described below.

1) MTC connection interval field (octet 8): This field indicates the time range in which the MTC device can access the network. This is a field for implementing the time control characteristic among the service requirements of the MTC.

2) MTC connection priority field (octet 9): It is a field for implementing the time tolerance characteristic and the PAM characteristic among the MTC service requirements. According to the value of the MTC connection priority field, the right of the MTC device to access the network can be designated for each MTC group. That is, the network operator can grant access authority to each MTC group according to the load of the network, thereby adjusting the overall traffic of the network. Table 2 is an example of a network access right according to the value of the MTC connection priority field.

Bit (3, 2, 1) Description 000 No MTC access is allowed 001 Priority Alarm Message (PAM) sending only is allowed 010 Only PAM sending and mobile terminating (MT) are allowed 011 mobile originating (MO) only is allowed 100 All MTC services are allowed 101 spare, shall be interpreted as '100' (All MTC services are allowed) 110 spare, shall be interpreted as '100' (All MTC services are allowed) 111 spare, shall be interpreted as '100' (All MTC services are allowed)

Referring to Table 2, when the value of the MTC connection priority field is '000', connection of any MTC device in the MTC group is not allowed. If the value of the MTC connection priority field is '001', only connection for PAM transmission is allowed. When the value of the MTC connection priority field is '100', connection to the network of all MTC devices in the MTC group is permitted. That is, the network can monitor the traffic of the network from time to time to adjust the overall load of the network. If the load of the network is large, the value of the MTC connection priority field is set low to prevent connection to the network of the MTC device as much as possible. If the load of the network is small, the value of the MTC connection priority field is set high, The load of the network can be controlled.

3) MTC offline indication interval field (octet 7): It is a field for implementing offline indication property among MTC service requirements. The MTC offline indication interval field defines the threshold value of the offline indication for each MTC group as the periodic location registration period. In order to satisfy the offline indication characteristic, the MTC device should inform the network within a certain time if it can not communicate with the network any more. In the present invention, in order to minimize the change of the existing GERAN system, the threshold value of the offline instruction is set to a periodic RAU period. The periodic RAU period is a time reference value indicating that the existing legacy terminal is operating normally to the network. The network can thus know that the terminal is operating normally. Likewise, the threshold value of the offline indication of the MTC apparatus can be equally set to the periodic RAU period. Accordingly, the network can confirm whether the MTC apparatus is off-line within the threshold value.

The MTC offline indication interval field may comprise a unit field and a timer value field. The actual offline indication threshold can be calculated taking into account the unit specified in the unit field and the time specified in the timer value field. Table 3 is an example of a unit field constituting the MTC offline indication interval field.

Bit (8,7,6) Description 000 value is incremented in multiples of 2 seconds 001 value is incremented in multiples of 1 minute 010 value is incremented in multiples of decihours 111 value indicates that the timer is deactivated

Referring again to FIG. 5, in step S110, the network operator transmits a system information message to the MTC device. If the value of the MTC information is changed via the GPRS attach permission message or the RAU permission message, the network operator informs the MTC device of the change using the system information message. Using the system information message, each MTC device can detect the changed MTC information without any additional signaling connection. To this end, a new field for the MTC device indicating MTC information may be added to the system information message. The system information message of GERAN exists from SI1 to SI20 and a new field for the MTC device can be included in any of SI1 to SI20. Hereinafter, it is assumed that a new field for the MTC apparatus is included in SI13 for convenience of explanation. SI13 includes an information element (IE) called reset octets information, and a new field for the MTC apparatus can be added in the reset octets information.

Table 4 is an example of a new field for the MTC device added in the reset octets information.

≪ RAC: bit (8) >
<SPGC_CCCH_SUP: bit>
&Lt; PRIORITY_ACCESS_THR: bit (3) >
&Lt; NUM_MTC_GR: bit (n) >
/ * Repeat as many as NUM_MTC_GR * /
{
&Lt; MTC_SUBSCRIPTION_GRID: bit (n) >
&Lt; MTC_ACCESS_PERIOD: bit (8) >
&Lt; MTC_ACCESS_PRIORITY: bit (3) >
&Lt; MTC_IND_PERIOD: bit (8) >
}
<NETWORK_CONTROL_ORDER: bit (2)>

The bold text in Table 4 is the new field for the MTC device.

1) NUM_MTC_GR: Indicates the number of MTC groups that have transmitted MTC information. The transmission of the MTC information is repeated by the value of NUM_MTC_GR.

2) MTC_SUBSCRIPTION_GRID: Indicates the identification (ID) of the MTC group or MTC subscriber to which the changed MTC information applies. Unlike the GPRS attaching process or the RAU process in which the corresponding message is directly transmitted to the individual MTC information, since the MTC information to be changed is applied to each MTC group in the proposed invention, a field indicating the ID of the MTC group or the MTC subscriber is newly added.

3) MTC_ACCESS_PERIOD: This field is the same as the MTC connection interval field described in step S100 of FIG.

4) MTC_ACCESS_PRIORITY: This field is the same as the MTC connection priority field described in step S100 of FIG.

5) MTC_IND_PERIOD: This field is the same as the MTC offline instruction interval field described in step S100 of FIG.

Hereinafter, a method of providing an MTC service through a paging request message will be described.

6 is another embodiment of the proposed MTC service providing method.

In step S200, the network operator transmits a GPRS attach permission message and an RAU permission message to the MTC device. This is the same as the GPRS attach permission message and the RAU permission message described in step S100 of FIG.

In step S210, the network operator transmits a paging request message to the MTC device. If the value of the MTC information is changed via the GPRS attach permission message or the RAU permission message, the network operator notifies the MTC device of the change using the paging request message. Paging in the MBMS is performed at the MBMS session level rather than at each device level. Similarly, if the paging is performed on an MTC group basis rather than on an MTC device basis by an MTC group ID, no additional signaling connection is needed for each MTC device. Accordingly, each MTC apparatus can detect the changed MTC information without additional signaling connection using the paging request message. For this purpose, a new field for the MTC device indicating the MTC information may be added to the page request message. Hereinafter, a new field for the MTC apparatus is added to the paging request type 2 message in the paging request message, but the present invention is not limited thereto. The paging request type 2 message is transmitted on the Common Control Channel (CCCH) and can carry up to three pieces of mobile identity information. At least two UEs can be identified by a maximum of three mobile identity information, and a third mobile identity information (mobile identity 3) can carry information about a third UE or an MBMS session. A new field for the MTC device may be added to mobile identity 3. Table 5 is an example of a paging request type 2 message configuration including mobile identity 3 with a new field added for the MTC device.

IEI Information element Type Presence Format length L2 Pseudo Length L2 Pseudo Length M V  One RR management Protocol Discriminator Protocol Discriminator M V 1/2 Skip Indicator Skip Indicator M V 1/2 Paging Request Type 2 Message Type Message Type M V One Page Mode Page Mode M V 1/2 Channels Needed for Mobiles 1 and 2 Channel Needed M V 1/2 Mobile Identity 1 TMSI / P-TMSI M V 4 Mobile Identity 2 TMSI / P-TMSI M V 4 17 Mobile Identity 3 Mobile Identity O TLV 3-10 P2 Rest Octets P2 Rest Octets M V 1-11

Table 6 shows an example of the configuration of mobile identity 3 according to the proposed MTC service providing method.

8 7 6 5 4 3 2 One Mobile Identity IEI octet 1 Length of Mobile Identity contents octet 2 0 0 0 MCC / MNC indic odd / even
indic Type of identity octet 3 spare
MTC Subscription ID octet 4 octet 5 octet 6 MCC digit 2 MCC digit 1 octet 6a ^* MNC digit 3 MCC digit 3 octet 6b ^* MNC digit 2 MNC digit 1 octet 6c ^* MTC Indication period octet 7 MTC Access period octet 8 0 0 0 0 0 MTC access priority octet 9 spare

Table 7 is an example of the contents indicated by the type of identity field located in octet 3 of Table 6. [

Bit (3, 2, 1) Description 000 IMSI 010 IMEI 011 IMEISV 100 TMSI / P-TMSI / M-TMSI 101 TMGI and optional MBMS Session Identity 110 MTC Subscription identity 000 No Identity (note 1) all other values are reserved.

Referring to Table 7, when the value of the type of identity field is 110, the MTC subscriber or the MTC group is identified by the mobile identity 3 of the paging request type 2 message.

Table 8 shows an example of the contents indicated by the Odd / even indication field located at the octet 3 of Table 6. &lt; tb &gt; &lt; TABLE &gt;

Bit (4) Description 0 even number of identity digits and also when the TMSI / P-TMSI or TMGI and
optional MBMS Session Identity or MTC information is used One odd number of identity digits

The new fields for the MTC device in Table 8 are as follows.

2) MTC SUBSCRIPTION ID: Indicates the ID of the MTC group or MTC subscriber to which the changed MTC information applies. Unlike the GPRS attaching process or the RAU process in which the corresponding message is directly transmitted to the individual MTC information, since the MTC information to be changed is applied to each MTC group in the proposed invention, a field indicating the ID of the MTC group or the MTC subscriber is newly added. The MTC apparatus belonging to each MTC group receives the MTC group ID through the paging request message, thereby knowing the connection section information corresponding to the ID of the corresponding MTC group, the access priority order information according to the network load, and the periodic location registration information .

3) MTC_ACCESS_PERIOD: This field is the same as the MTC connection interval field described in step S100 of FIG.

4) MTC_ACCESS_PRIORITY: This field is the same as the MTC connection priority field described in step S100 of FIG.

5) MTC_IND_PERIOD: This field is the same as the MTC offline instruction interval field described in step S100 of FIG.

Meanwhile, instead of adding a new field for the MTC apparatus to the paging request type 2 message as described above, a new type of paging request message may be defined to provide the MTC service. Since the existing paging request message is preferentially used for paging of the legacy terminal, there is a restriction that a new field for the MTC device is also added to the selectively transmitted field such as the mobile identity 3 of the paging request type 2 message. In addition, since only one MTC group information can be included, a new type of paging request message needs to be defined to include information on more MTC groups. Accordingly, the present invention proposes a paging request type 4 message that can include information on up to four MTC groups.

Table 9 shows an example of a page request type 4 message according to the proposed MTC service providing method.

IEI Information element Type / Reference Presence Format length L2 Pseudo Length L2 Pseudo Length M V  One RR management Protocol Discriminator Protocol Discriminator M V 1/2 Skip Indicator Skip Indicator M V 1/2 Paging Request Type 3 Message Type Message Type M V One Page Mode Page Mode M V 1/2 Channels Needed for Mobiles 1 and 2 Channel Needed M V 1/2 Mobile Identity 1 Mobile identity O TLV 3-10 Mobile Identity 1 Mobile identity O TLV 3-10 Mobile Identity 1 Mobile identity O TLV 3-10 Mobile Identity 1 Mobile identity O TLV 3-10 P3 Rest Octets P3 Rest Octets M V 3

The mobile identity information included in the paging request type 4 message in Table 9 may be the same as described above.

7 is a block diagram of a network operator and an MTC apparatus in which an embodiment of the present invention is implemented.

The network operator 800 includes a processor 810, a memory 820, and a radio frequency unit 830. Processor 810 implements the proposed functionality, process and / or method. That is, the MTC service providing method proposed in FIG. 5 or FIG. 6 may be implemented. The layers of the air interface protocol may be implemented by the processor 810. The memory 820 is coupled to the processor 810 and stores various information for driving the processor 810. [ The RF unit 830 is connected to the processor 810 to transmit and / or receive a radio signal and to transmit a system information message or a paging request message.

The MTC apparatus 900 includes a processor 910, a memory 920, and an RF unit 930. Processor 910 implements the proposed functionality, process and / or method. The layers of the air interface protocol may be implemented by the processor 910. The processor 910 processes the received system information message or the paging request message. The memory 920 is coupled to the processor 910 and stores various information for driving the processor 910. [ The RF unit 930 is coupled to the processor 910 to transmit and / or receive wireless signals and receive a system information message or a paging request message.

Processors 810 and 910 may include application-specific integrated circuits (ASICs), other chipsets, logic circuits, and / or data processing devices. Memory 820 and 920 may include read-only memory (ROM), random access memory (RAM), flash memory, memory card, storage media, and / or other storage devices. The RF units 830 and 930 may include a baseband circuit for processing radio signals. When the embodiment is implemented in software, the above-described techniques may be implemented with modules (processes, functions, and so on) that perform the functions described above. The modules may be stored in memories 820 and 920 and executed by processors 810 and 910. The memories 820 and 920 may be internal or external to the processors 810 and 910 and may be coupled to the processors 810 and 910 in various well known means.

MTC service based on MTC group handling can be provided by the proposed MTC service providing method. The time control characteristic, which is an MTC characteristic that notifies the MTC device when a connection of the MTC device is allowed within a given connection interval and the connection interval is changed, can be satisfied by the MTC_ACCESS_PERIOD field included in the system information message or the paging request message. MTC devices delay data transmission and the network determines the traffic load for each MTC group and the time tolerance characteristic, which is the MTC characteristic that the MTC device should determine, can be satisfied by the MTC_ACCESS_PRIORITY field included in the system information message or the paging request message have. The offline indication characteristic, which is an MTC characteristic that informs the network within a predetermined time when the MTC apparatus can not maintain the signaling connection with the network, can be satisfied by the MTC_IND_PERIOD field included in the system information message or the paging request message. Thereby ensuring efficient operation of the MTC apparatus.

In the above-described exemplary system, the methods are described on the basis of a flowchart as a series of steps or blocks, but the present invention is not limited to the order of the steps, and some steps may occur in different orders . It will also be understood by those skilled in the art that the steps shown in the flowchart are not exclusive and that other steps may be included or that one or more steps in the flowchart may be deleted without affecting the scope of the invention.

The above-described embodiments include examples of various aspects. While it is not possible to describe every possible combination for expressing various aspects, one of ordinary skill in the art will recognize that other combinations are possible. Accordingly, it is intended that the invention include all alternatives, modifications and variations that fall within the scope of the following claims.

Claims (14)

A method for providing a machine-type communication (MTC) service in a wireless communication system,
Sending a General Packet Radio Service (GPRS) attach accept message and a routing area update (RAU) grant message to the MTC device; And
And transmitting a system information (SI) message or a paging request message of a GSM / EDGE Radio Access Network (GERAN) to the MTC apparatus,
Wherein the GPRS attach permission message and the RAU grant message comprise information of an MTC group for at least one MTC group,
Wherein the system information message or the paging request message includes an ID of an MTC group and information of the MTC group,
The MTC group is a group of MTC devices sharing one or more MTC features,
Wherein the information of the MTC group includes an MTC offline indication period information indicating a threshold of a time when the MTC device in the MTC group can not connect to the network,
Wherein the threshold value is a periodic RAU (Routing Area Update) period. The method according to claim 1,
Wherein the system information message is added to the reset octets information of the SI 13 among the system information messages. The method according to claim 1,
Wherein the information of the MTC group includes MTC access period information indicating a time range in which the MTC apparatus in the MTC group can access the network. The method according to claim 1,
Wherein the information of the MTC group includes MTC access priority information indicating access right to the network of the MTC group determined based on a network load. A base station in a wireless communication system,
Memory; A transceiver; And a processor connecting the memory and the transceiver, wherein the processor
Sending a General Packet Radio Service (GPRS) attach accept message and a routing area update (RAU) grant message to the MTC device; And
A system information (SI) message or a paging request message of a GSM / EDGE Radio Access Network (GERAN) to an MTC apparatus,
Wherein the GPRS attach permission message and the RAU grant message comprise information of an MTC group for at least one MTC group,
Wherein the system information message or the paging request message includes an ID of an MTC group and information of the MTC group,
The MTC group is a group of MTC devices sharing one or more MTC features,
Wherein the information of the MTC group includes an MTC offline indication period information indicating a threshold of a time when the MTC device in the MTC group can not connect to the network,
Wherein the threshold is a periodic RAU (Routing Area Update) period. delete delete delete delete delete delete delete delete delete

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