WO2011083997A2 - 기계 타입 통신 시스템 - Google Patents
기계 타입 통신 시스템 Download PDFInfo
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- WO2011083997A2 WO2011083997A2 PCT/KR2011/000096 KR2011000096W WO2011083997A2 WO 2011083997 A2 WO2011083997 A2 WO 2011083997A2 KR 2011000096 W KR2011000096 W KR 2011000096W WO 2011083997 A2 WO2011083997 A2 WO 2011083997A2
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- type communication
- machine type
- communication terminal
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- terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/02—Access restriction performed under specific conditions
- H04W48/06—Access restriction performed under specific conditions based on traffic conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0268—Traffic management, e.g. flow control or congestion control using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/02—Access restriction performed under specific conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/18—Management of setup rejection or failure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/19—Connection re-establishment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/30—Connection release
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
- H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
Definitions
- the following embodiments relate to a machine type communication system, and more particularly, to a method and procedure for packet transmission and reception in a wireless network for machine type communication.
- Machine Type Communication Service (Machine Type Communication) is a service for exchanging information between machines or between machines and users.
- Machine type communication is used in areas such as car navigation and sensor networks using specially developed terminals and servers such as communication terminals with low data transmission rates.
- One side of exemplary embodiments proposes a method of transmitting data for a machine type communication service.
- Yet another aspect of exemplary embodiments provides a method for managing a wireless network for providing machine type communication services.
- the transmission unit for transmitting the characteristic information of the machine type communication terminal to the machine type communication server to the machine type communication server and in response to the characteristic information of the machine type communication terminal
- a machine type communication terminal including a receiving unit for receiving control information from the machine type communication server in consideration of characteristics of the machine type communication terminal.
- a machine type communication terminal comprising a network address storage for storing a network address of the machine type communication terminal that is identical to a network address of a second machine type communication terminal.
- the communication request from a communication unit for transmitting a communication request to a plurality of machine type communication terminals having the same network address and at least one communication terminal among the plurality of machine type communication terminals
- a machine type communication server comprising a receiving unit for receiving data in response to receiving the data and terminating the communication procedure in accordance with the reception of the data.
- According to one aspect of the exemplary embodiments may transmit data for a machine type communication service.
- Another side of the example embodiments may manage a wireless network for providing machine type communication services.
- FIG. 1 is a diagram illustrating an example of a machine type communication system composed of a wireless network or a wired network.
- FIG. 2 is a diagram illustrating a vehicle navigation and vehicle control operation scenario using a machine type communication service.
- FIG. 3 is a diagram illustrating an operation scenario of a machine type communication service in a home.
- FIG. 4 is a diagram illustrating an example of an automated machine type communication service used at home.
- Fig. 5 is a block diagram showing the structure of a machine type communication terminal according to an exemplary embodiment.
- Fig. 6 is a block diagram showing the structure of a machine type communication terminal according to another exemplary embodiment.
- Fig. 7 is a block diagram showing the structure of a machine type communication server according to another exemplary embodiment.
- FIG. 8 is a diagram illustrating a step-by-step procedure of exchanging control information for wireless network access of a machine type communication terminal.
- FIG. 9 is a diagram illustrating a communication scheme in which a plurality of machine type communication terminals in the same group have their own radio bearers in a radio access section and share one radio bearer after the base station.
- FIG. 1 is a diagram illustrating an example of a machine type communication system composed of a wireless network or a wired network.
- the machine type communication system includes machine type communication server 110, machine type communication gateways 120, 121, 122, 123, machine type communication terminals 131, 132, 133, 134, 135, 136, 141, 142, 143. ) May be included.
- the wireless network for supporting the machine type communication service may be a wireless LAN, a cellular mobile communication network, or a wireless network separately configured for the machine type communication service.
- a machine type communication server is an entity having an interface with or within a cellular network that provides machine type communication services.
- the machine type communication gateway manages a control plane between the machine type communication server and the machine type communication terminals, or relays the communication between the machine type communication server and the machine type communication terminal.
- the machine type communication gateway may receive data from a plurality of machine type communication terminals, and transmit the received data to a wireless network.
- the machine type communication terminal is a terminal that connects to the machine type communication server using a communication network or the like and provides various services to the users 150, 151, and 152.
- the machine type communication terminal may be one of several types.
- the first type of machine type communication terminal may be a terminal that does not include all the functions of the machine type communication terminal, such as a form of a module implanted in a general user terminal in a cellular system.
- a terminal that does not include a function including an existing terminal may be classified as a simplified machine type communication terminal.
- a navigation module installed in an automobile or a cell phone may be implanted in a module form and used for navigation or vehicle control.
- a second type of machine type communication terminal is a separate device that provides a machine type communication service (e.g., home appliances, IT devices, automobiles, industrial equipment, infrastructure equipment, social safety equipment, or environmental equipment). It is a machine type communication terminal implanted in).
- This type of terminal is a terminal that includes all the functions of a machine type communication terminal and can be classified as a complex machine type communication terminal.
- the second type of machine-type communication terminal is implanted in a meter, elevator, or vending machine such as water, electricity, or gas, and transmits and receives control information and data through a wireless network.
- a third type of machine type communication terminal is a terminal which is not connected to another wired or wireless network and has only an interface with one communication network (for example, 3GPP communication network).
- the machine type communication terminal used for temperature sensing, disaster detection, etc. may collect the corresponding information and report the collected information to the machine type communication server using a designated communication network.
- a fourth type of machine type communication terminal is a communication device having an interface with two or more wireless networks.
- a device that connects different wireless networks such as a sensor network, a mesh network, an ad-hoc network, a cellular network, and transmits collected data or control information to the wireless network, or from a wireless network. It is a device that can receive.
- a communication device for reporting information collected from a sensor network installed in a bridge or the like to a machine type communication server or the like through a cellular network can be considered.
- the user 151, 152, 153 of the machine type communication terminal receives a service provided from the machine type communication server 110 or the machine type communication terminal 131, 132, 133, 134, 135, 136, 141, 142, 143.
- the data of the machine type communication server 110 or the machine type communication terminal 131, 132, 133, 134, 135, 136, 141, 142, 143 is periodically received or requested.
- the setting of the communication server 110 or the machine type communication terminal 131, 132, 133, 134, 135, 136, 141, 142, 143 can be changed.
- machine type communication terminals should be unique in the network.
- machine type communication terminals should be distinguishable in the wireless network according to the type of device.
- functions and features that can be provided by each machine type communication terminal may be distinguished and identified in a wireless network, and accordingly, may be distinguished in groups.
- a wireless LAN or a cellular mobile communication network may share an identifier of a machine type communication terminal operating in a corresponding wireless network, or introduce a separate identifier to support a service using a machine type communication terminal.
- a wireless network providing a service to a machine type communication terminal uses an identifier of the machine type communication terminal.
- a plurality of machine type communication terminals are identifiable as a group from a wireless network.
- paging may be performed for a group including machine type communication terminals.
- a group identifier can be assigned to a group containing machine type communication terminals.
- an identifier indicating a paging group may be utilized or a specific value may be assigned to IMSI or S-TMSI. For example, if the IMSI is all configured to 0, the existing terminal can ignore the paging and only machine type communication terminals can receive the paging.
- a new identifier (eg, MTC-RNTI) that can be recognized by machine type communication terminals can be defined and used to receive a paging message.
- the DRX or paging for a machine type communication terminal may be set at a larger period than existing terminals.
- the machine type communication terminal may receive a paging period set in the same manner as the existing terminals, and combine the received paging period and the preset control information to set a unique paging period applied to the machine type communication terminal.
- the machine type receiving terminal receives the changed system information or the control information for a predetermined paging period and reacts according to the changed system information.
- the wireless network may increase the system frame number of the system and transmit it to the machine type communication terminal using the system information.
- additional control information may be transmitted to the system information, or a control information may be transmitted by newly defining an SIB for a machine type communication terminal.
- the MIB SIB or SIB 14, SIB 15 or later may be defined for the machine type communication terminal.
- the SIB may be scheduled using SIB1 like the existing SIBs.
- the RNTI may be newly defined to receive system information of the machine type communication terminal.
- the wireless network may determine that the connection between the wireless network and the machine type communication terminal is lost.
- Machine-type communication devices must be able to operate with very little power consumption, ultimately enabling low power consumption with power on / off control.
- the specific machine type communication device or the specific machine type communication service should be able to be configured to transmit machine type communication information and control information transmission and reception only at a preset time using a built-in timer.
- This specific operation and operation time setting may be set by a machine type communication control block in a wireless network supporting a machine type communication service, a user terminal in a wireless network, a machine type communication server, a machine type communication subscriber, or a machine type communication service provider.
- Related functions and interfaces shall be provided.
- Machine type communication devices may be considered to operate at a frequency dedicated to machine type communication so that they can be operated with very little power consumption, and thus, operation of a wireless network should be possible.
- the machine type communication devices may perform different operations according to the amount of power remaining.
- low-power machine-type communication devices can increase the measurement and reporting periods.
- Dynamic Voltage Scaling can be introduced to enable mechanical type communication devices to operate at very low power consumption.
- DVS Dynamic Voltage Scaling
- RRC_IDLE state or connected state in cellular state or in RRC_CONNECTED state in cellular state, it operates at very low voltage or low clock.
- RRC_CONNECTED state When disconnected, in RRC_IDLE state or connected state in cellular state, or in RRC_CONNECTED state in cellular state, it operates at very low voltage or low clock.
- the operation of the machine-type communication device in the wireless network and the setting of the radio link can be different.
- the machine type communication device should be capable of remote control by machine type communication server or wireless network.
- the machine-type communication device must be capable of remote control of activation or deactivation setting for each function and characteristic. If the operator of the wireless network also plays a role of a service provider, the wireless network may detect a characteristic of the operation of the machine type communication terminals to activate / deactivate a specific function of the machine type communication terminal.
- FIG. 2 is a diagram illustrating a vehicle navigation and vehicle control operation scenario using a machine type communication service.
- the machine type communication server 210 for supporting a navigation service is connected to at least one machine type communication gateway 220 or 221 using a wired or wireless network.
- the machine type communication gateways 220 and 221 may be connected to the machine type communication device 230 installed in the vehicle, or may be connected to the machine type communication terminal 241 of the user through the interface device 240 installed in the vehicle.
- the base station 222 constituting the wireless network may operate as a machine type communication gateway, and the machine type communication server 210 may be a machine type communication terminal 250 or 260 via a plurality of machine type communication gateways 221 and 222. ) Can be connected.
- the machine type communication terminal 230 represents a machine type communication terminal which is implanted and mounted in an automobile.
- the user may control the machine type communication function using the user node 241 or control and set the machine type communication function through a separate user interface provided by the machine type communication terminal 240.
- a machine type communication function for navigation and vehicle control is applied to the machine type communication terminal 250, and a method for providing a machine type communication service by setting an interface for the machine type communication terminal 250 in a vehicle. It is also possible.
- an automobile may provide an interface for the machine type communication terminal 260 and the user node 261 may control the machine type communication terminal 260 using a wireless LAN, a cellular mobile communication network.
- the machine type communication terminal in the vehicle transmits information such as the moving speed or the position of the vehicle to the machine type communication server 210 through the machine type communication gateways 221 and 222 according to the setting and control of the machine type communication server and the user. report.
- the machine type communication server 210 and the user set a threshold value for the moving speed of the vehicle, and the machine type communication terminal 230, 240, 250, 260 when the speed of the vehicle is slower or faster than the set threshold value. Can be controlled to report and these thresholds may be set more than one.
- the machine type communication server 210 and the user may control to report when the vehicle enters a specific area or road.
- the machine type communication server 210 provides safe and convenient traffic information such as road traffic information such as road congestion information, traffic accident information, toll or free road guide information, road construction information, freezing and flooded road information, and the like. Or provide optimal navigation information to the destination and real-time traffic information.
- connection setting parameters of the wireless network may vary according to the frequency and frequency of packet information for the machine type communication service or the machine type communication function, and the required channel level.
- the connection configuration parameter may vary depending on the property of the communication service.
- connection setting parameters of the wireless network may vary according to mobility information, transmission speed, urgentness of data transmission, communication period, priority of data transmission, security requirement information, grouping, etc. of the machine type communication terminal 250. .
- each machine type communication terminal 250 may be classified into fixed, semi fixed, low speed movement, high speed movement, and the like.
- a machine type communication terminal moving only in a specific region may be classified as a locating machine type communication terminal.
- Machine type communication terminals are generally characterized by fixed, semi-fixed, low-speed movements, or only within limited areas. This is called low mobility, and it can be used to easily manage the mobility of the machine type communication terminal.
- the machine type communication terminal may not manage mobility or may be less than other terminals.
- a machine type communication terminal in the connected state for example, a machine type communication terminal in the RRC_Connected state may set the s-Measure value of the MeasConfig of the RRC message higher than the actual value in order to reduce the number of measurements.
- the wireless network may newly set a new threshold for a machine type communication terminal, i.
- a new speed state, Low Mobility and its scaling factor may be defined to increase the measurement period.
- a machine type communication terminal in a disconnected state may reduce the number of measurement procedures for cell-reselection.
- the machine type communication terminal may set the value of the parameter S ServingCell obtained from the system information higher than the obtained value.
- the wireless network may reduce the number of measurements of the machine type communication terminal by setting a low value of the parameter S intrasearch or S nonintrasearch included in the system information.
- the system information is information unique to each cell. Therefore, it may be meaningful only in the cell to which the machine type communication terminal belongs. Therefore, separate system information (for example, MTC SIB or SIB14) for a machine type communication terminal can be newly defined to set different measurement thresholds from other terminals.
- the wireless network may reduce the number of measurements of the machine type communication terminal by setting a long measurement or reporting period for the serving cell.
- the wireless network can reduce the number of reports by setting the measurement period of the machine-type communication terminal to the same as the other terminal, but report the value derived by measuring several times.
- the machine type communication terminal may be performed in a period of a DRX cycle or a multiple of a paging cycle or at other times. That is, the measurement and reporting may be performed at two or more times the DRX cycle or the paging cycle, or the measurement and reporting may be performed regardless of the DRX cycle or the paging cycle. According to one side, the machine-type communication terminal performs one or more measurements and reports in a period shorter than the DRX cycle or a paging cycle and enters the DRX, or performs a measurement and report every cycle longer than the DRX cycle or the paging cycle, and then enters the DRX. can do.
- the machine type communication terminal supports mobility such as a measurement or reselection procedure for an adjacent cell. Procedures may not be performed.
- the machine type communication terminal may manage its mobility status and report the mobility status to the wireless network.
- the mobility state managed and reported by the machine type communication terminal may be location information, cell related information, cell selection related information, cell selection information, handover information, serving cell, and target cell related information of the machine type communication terminal.
- the machine type communication terminal may transmit the mobility status to the wireless network when performing a procedure related to mobility, and may report the mobility status to the wireless network in various cases, such as periodically or when a specific parameter exceeds a threshold. have.
- the machine-type communication device is not a method of maintaining a control plane connection with a target base station through a serving base station like a conventional cellular system, but may access a wireless network to request connection establishment and exchange information.
- a machine-type communication device uses a short period of service during a high-speed movement or uses a service having a time constraint for transmission and transmission, the handover procedure of an existing cellular system may be applied.
- the machine type communication device may transmit the location information of the machine type communication device to another machine type communication device to support mobility.
- the location information may be an identifier of a cell received from a wireless network or an identifier for identifying an area in which a machine type communication device is installed, or information such as a GPS.
- the machine type communication terminal can transmit its position information periodically or aperiodically. According to one side, the machine-type communication terminal does not necessarily perform a mobility management procedure even if its location has changed. According to one side, the machine-type communication terminal can update its location only for a predetermined time.
- the machine type communication terminal may move to a restricted area.
- the wireless network can control the operation of the machine type communication terminal entering the restricted area.
- the wireless network may determine whether the machine type communication terminal can access the wireless network in the restricted area by using the identifier of the machine type communication terminal. If not, the wireless network may reject the connection request of the machine type communication terminal.
- the HSS may transmit a list of a base station capable of accessing a machine type communication short maritime having low mobility, a list of cells, a list of tracking regions, a list of registration regions, a list of MMEs, and the like to the MME. Based on this, the MME can distinguish between base stations to which a machine type communication terminal can connect and base stations to which it cannot connect.
- the HSS can provide additional information that can time limit the connection of the machine type communication terminal.
- additional information there may be a time zone for the machine type communication terminal to access the wireless network or a list of base stations currently accessible.
- the wireless network may reject the connection of the machine type communication terminal.
- the radio network may reject it during the random connection of the machine type communication terminal or barring the connection of the machine type communication terminal.
- control information of the operation interruption can be transmitted in a paging message, a system information RRC message, or the like.
- the RRC message may be used to transmit control information for limiting access to a terminal to be randomly connected, or a parameter for limiting attempts to access a wireless network of a machine type communication terminal may be transmitted.
- the machine type communication terminal can check its status and report it. For example, in the case of performing an unexpected behavior other than a predetermined behavior, when there is an artificial manipulation, the machine type communication terminal may determine that it is in an abnormal state and transmit it to the machine type communication server.
- the machine type communication server may observe the behavior of the machine type communication terminal to determine whether it is a normal state or an abnormal state. If it is determined that the state of the machine type communication terminal is abnormal, the machine type communication server may stop the operation of the machine type communication terminal.
- the machine type communication terminal may report its number of cell selections, number of cell selections, or handovers to the wireless network, and the wireless network may determine whether the machine type communication terminal is abnormal.
- the wireless network may control the operation of the machine type communication terminal by changing parameter settings.
- the machine type communication terminal can communicate using different frequency bands in a given situation. For example, if it is determined that communication is impossible in a specific frequency band, the machine type communication terminal may transmit data using another frequency band. In a state in which communication is impossible, the machine type communication terminal may transmit a warning message or a notification message having a priority different from that of the existing access class to the wireless network. The machine type communication terminal can search all possible frequency bands until it transmits its situation.
- the wireless network may send a warning message to the machine type communication terminal using paging message, cyste information, RRC message and the like.
- FIG. 3 is a diagram illustrating an operation scenario of a machine type communication service in a home.
- the machine type communication server 310 for supporting the home machine type communication service is connected to one or more machine type communication gateways 310, 320, and 330 by using a wired or wireless network. It is possible to configure a connection on a communication protocol for exchanging information with machine type communication terminals 340, 350, 360, and 370 installed at home.
- a small base station or a home node B constituting the wireless network may also operate the machine type communication gateways 310, 320, 330.
- the machine type communication gateways 320 and 330 serve to relay data exchange between the machine type communication terminal 370 and the machine type communication server 310.
- the machine type communication terminals 340, 350, 360, and 370 may be connected to the machine type communication gateways 310, 360, and 370 by wire or wireless network, and may be connected to the user nodes 380 and 390 by wireless network. .
- the user nodes 380 and 390 may be configured as a user node 380 applied to a user terminal of a wireless LAN, a cellular mobile communication network, or a user node 390 separately introduced for a corresponding machine type communication service.
- FIG. 4 is a diagram illustrating an example of an automated machine type communication service used at home.
- the HVAC system consists of a number of machine type communication terminals 410, 420, 430 and a machine type communication server 430.
- the machine type communication terminal 410, 420, 430 reports the temperature, humidity, and the like in the home to the machine type communication server 440, and the machine type communication server 440 is a device type communication terminal 410, 420, 430. According to the report, it is possible to control the machine type communication terminal (410, 420, 430).
- the machine type communication server 440 does not need to collect information from all machine type communication terminals 410, 420, 430 installed in the house. This is because the temperature information measured by each machine type communication terminal 410, 420, 430 is similar to each other.
- each machine type communication terminal 410, 420, 430 may have the same network address.
- the machine type communication server 440 transmits a data transmission request for a network address assigned to each machine type communication terminal 410, 420, 430.
- only one machine type communication terminal may transmit data at the request of the machine type communication server 440.
- each machine type communication terminal 410, 420, 430 may have a unique network address.
- the machine type communication server 440 broadcasts or multicasts the data transmission request to each machine type communication terminal 410, 420, 430, and then either machine type communication terminal. Data can be received from.
- Fig. 5 is a block diagram showing the structure of a machine type communication terminal according to an exemplary embodiment.
- the machine type communication terminal 500 may include a receiver 510 and a transmitter 520.
- an access class used in the 3GPP network.
- an access class As a method of using an access class, 1) a method of utilizing an access class used in an existing network, 2) a method of introducing a new access class, and 3) a method of changing a connection method may be used.
- a network of a plurality of machine type communication terminals is changed by changing a network connection probability for packet transmission of the machine type communication terminal. You can control the connection.
- the transmitter 520 may generate an arbitrary number between 0 and 1.
- the receiver 510 may receive a predetermined threshold value from the machine type communication server 530, and the transmitter 520 may compare the generated threshold with a predetermined number. If any number generated is smaller than the predetermined threshold, the transmitter 520 may send the packet to the machine type communication server 530.
- the machine type communication server 530 may change a predetermined threshold to control the number of machine type terminals connecting to the machine type communication server 530 or transmitting packets to the machine type communication server 530.
- the transmitter 520 may exchange control information with the machine type communication server 530 using the connection control information used in the third layer or more of the OSI 7 layer, such as the RRC layer. For example, the transmitter 520 may configure new connection control information, add new settings to existing connection control information, or add new setting values to transmit the control information.
- the control information may include characteristic information of the machine type communication terminal.
- the characteristic information may include information indicating that the machine type communication terminal 500 is a machine type communication terminal, the device type of the machine type communication terminal 500, and information about the function 500 of the machine type communication terminal. have.
- the transmitter 520 may include the characteristic information in the RRC message and transmit.
- the transmitter 520 may transmit characteristic information by adding a new RRC Information Element (IE) or adding a specific field to the RRCConnectionRequest message of the 3GPP wireless network.
- IE RRC Information Element
- the transmitter 520 may define MTC_device_IE or field in an RRC message such as RRCConnectionReconfigurationComplete, RRCConnectionRestablishment, etc., and may set one of four types of the machine type communication terminal mentioned above.
- MTC_device may be added to an existing RRC message such as RRCConnectionRequest, RRCConnectionReconfigurationComplete, RRCConnectionRestablishment, and the like.
- the characteristic information of the machine type communication terminal 500 may be transmitted using EstablishmentCause of the RRCConnectionRequest.
- the value of one of spare1, spare2, spare3 can be distinguished as a machine type communication terminal in the communication network or machine type communication server 530 by using a value of MachineTypeCommunication.
- a new IE or field such as MTCfeature_activelist and MTCfeature_deactivelist can be defined in an existing RRC message. Values that MTCfeature_activelist and MTCfeature_deactivelist can have are LowMobility and ExtraLowPowerConsumption, which are features of the machine type communication terminal 500.
- MTCfeature_activelist and MTCfeature_deactivelist are LowMobility and ExtraLowPowerConsumption, which are features of the machine type communication terminal 500.
- the RRC message may transmit control information such as configuration related to a function to be activated / deactivated, for example, radio bearer configuration or logical channel configuration.
- the machine type communication server 530 may determine that the machine type communication terminal 500 performs a machine type communication function based on the characteristic information of the machine type communication terminal 500.
- the characteristic information may include information about a service that the machine type communication terminal 500 can provide.
- the transmitter 520 may obtain information on the activated / deactivated characteristics of the machine type communication terminal 500 from the subscription information of the HSS entity or the HLR entity.
- the subscription information may include a list of the activated or deactivated features of the machine type communication terminal 500 or may include information related to the activated features.
- the subscription information may include a list of base stations that the machine type communication terminal 500 is expected to access when low mobility is activated, or information on a time interval that the machine type communication terminal can communicate when time controlled is activated. It may include.
- information on the activated / deactivated characteristics of the machine type communication terminal 500 obtained from the subscription information may also be included in the characteristic information.
- the receiver 510 receives control information from the machine type communication server 530 in consideration of the property of the machine type communication terminal 500 in response to the property information of the machine type communication terminal 500.
- the receiver 510 may receive a deactivation command for at least one of specific functions of the machine type communication terminal from the machine type communication server 530 as control information. If the data transmission function is stopped for specific machine type terminals among a plurality of machine type terminals controlled by the machine type communication server 530, the number of machine type terminals capable of data transmission to the machine type communication server 530 is reduced. do. That is, machine type communication terminals capable of data transmission have priority of data transmission, and the machine type communication terminal can transmit important information preferentially.
- control information may be a measurement threshold determined to increase the radio channel measurement period of the machine type communication terminal 500.
- the machine type communication terminal 500 may compare the radio channel measurement result with a measurement threshold and determine the next radio channel measurement time according to the comparison result.
- the radio channel measurement period may be changed according to the value of the measurement threshold.
- the machine type communication server 530 may change the radio channel measurement period of the machine type communication terminal 500 by changing the value of the measurement threshold. As the radio channel measurement period increases, the battery life of the machine type communication terminal 500 may increase.
- the characteristic information may include whether data transmitted by the machine type communication terminal 500 to the machine type communication server 530 is sensitive to time delay. For example, when the machine type communication terminal 500 performs a fire monitoring role, the data transmitted by the machine type communication terminal 500 may be regarded as sensitive to time delay, but the machine type communication terminal 500 may In the case of monitoring the safety of the bridge, the data transmitted by the machine type communication terminal 500 can be regarded as robust against time delay.
- the machine type communication server 530 controls a plurality of machine type communication terminals, and the data from the machine type communication terminals are congested and the bandwidth is limited, the receiver 510 is connected to some machine type communication terminals 500.
- the server connection restriction command can be received as control information.
- the machine type communication terminal 500 for monitoring the safety of the bridge is not connected to the server, the machine type communication terminal for monitoring the fire can preferentially transmit data.
- the transmitter 520 may transmit the data in consideration of the time importance of the data transmission or the limitation of the transmission time delay.
- the data transmitted by the transmitter 520 may be classified into data very sensitive to transmission delay time and data insensitive to transmission delay time.
- the transmitter 520 and the machine type communication server 530 may transmit data or set a radio link parameter in consideration of a delay tolerant to a transmission delay time.
- the transmission priority for each machine type communication terminal 500 may be set differently in consideration of the sensitivity to the transmission delay time.
- the radio link parameters may be set in consideration of the sensitivity to the transmission delay time, and the radio link parameters set using the access class may be transmitted.
- the access class barring factor (ac-BarringFactor) to a low value to reduce the probability of connection attempt, and ac for the machine type communication terminal.
- BarringTime can be set to increase network connection latency for machine type communication terminals that are not sensitive to transmission delay time.
- an access class different from the access class barring radio setting value may be set.
- one or more levels of access classes may be set according to sensitivity to transmission delay time.
- the machine type communication terminal when the machine type communication terminal transmits data using the 3GPP network, the machine type communication terminal can be controlled to prevent access to the wireless network using the RRC message.
- an RRCConnectionReject message may be transmitted to the machine type communication terminal.
- the wireless network may transmit an RRCConnectionReject message to the machine type communication terminal.
- one or more access classes are set according to a sensitivity of transmission delay time of the machine type communication terminal, and the above-described parameters such as ac-BarringFactor and ac-BarringTIme are set according to the set access class.
- ac-BarringFactor and ac-BarringTIme are set according to the set access class.
- a new timer can be set for the aforementioned access barring. For example, let's call the newly set timer T330.
- the T330 timer can be started if the machine type communication terminal receives an RRCConnectionReject in response to sending an RRCConnectionRequest. If the machine type communication terminal enters the RRC_CONNECTED state or the cell selection / selection is successfully performed, the T330 timer is stopped.
- the transmitter 520 may retransmit the RRCConnectionRequest message.
- the transmitter 520 may start the T330 timer when the access class fails to access the wireless network.
- the T330 timer may be started even if the wireless network is not probabilistic due to the ACbarring factor of the access class.
- the receiver 510 may receive an RRCConnectionRelease message from the wireless network.
- the receiving unit 510 includes NetworkOverloaded, which means that the current state of the wireless network is too high, thereby denying the connection state for a while, or RRCConnectionRelease, which includes a value such as TimeTolerantblocked which instructs to stop the operation of the machine type communication terminal for a predetermined time. You can receive a message.
- the transmitter 520 may terminate the connection with the wireless network (RRCConnectionRelease) and at the same time operate the T330 timer.
- the machine type communication terminal 500 may not attempt to access the wireless network, perform handover to another cell, or perform cell selection while the T330 timer is operating.
- the T330 timer indicates the time taken until the machine type communication terminal 500 attempts to access again when the connection to the wireless network fails.
- the machine type communication terminal 500 may be set so as not to attempt to reconnect for a longer time than the existing terminal.
- the T330 timer may be set to expire only when it is greater than the timer for the existing terminal.
- the type 1 of the machine type communication terminal should be set such that only communication related to the machine type communication is impossible and other methods of data communication are possible.
- type 1 of a machine type communication terminal pre-sets a specific data bearer to be used only for machine type communication, and uses the identifier of the data bearer set to be used only for machine type communication to allow connection when creating a connection of the data bearer. You can decide whether or not.
- one or more data bearer identifiers among 32 data bearer identifiers used in the LTE system may be preset for the machine type communication terminal, or the machine type communication terminal and the data bearer identifier may be dynamically connected when the data bearer is created.
- data communication of the machine type communication terminal may be distinguished using logicalChannelIdentity or eps-BearerIdentity.
- information on a time when packet transmission and reception is possible may be transmitted using system information or RRC message or MAC or physical layer information of a wireless network.
- the wireless network parameter it is possible to change the value of the wireless network parameter to maintain the RRC_CONNECTED state of the machine-type communication terminal, but limit the data transmission and reception.
- the priority value of LogicalChannelConfig can be set low by adjusting LogicalChannelConfig, which is an RRC message, or the machine type communication terminal transmits data at a low bit rate by setting prioritisedBitRate low. You can do that.
- mBR minimum bit rate
- the wireless network may lower the data rate below the minimum data rate when there is no room in the wireless network. For example, when a cellular network shares a wireless network with existing general cellular data and there is no room in a wireless network resource, the wireless network may transmit data at a minimum bit rate set to a minimum data rate.
- a transmission rate may be determined based on a maximum time deadline of data required by a machine type communication service or an application layer. For example, in the machine type communication service, the transmission rate is determined based on the size of the packet to be transmitted and the maximum transmission delay time. According to one side, the minimum data rate may be calculated as (packet size / maximum transmission delay time).
- the information generation period of the machine type communication service or the machine type communication function means a period of transmitting data to or receiving data from the wireless network in the machine type communication service.
- Data transmission and reception may occur aperiodically or periodically.
- aperiodic data transmission and reception may be divided into aperiodic in which the variation in time delay is predetermined and sporadic in which the variation is not predetermined.
- Aperiodic has a predetermined variation in time delay, it is possible to periodically transmit the data within a limited time by setting the variation in the time delay and the time delay in which packet data occurs.
- the information generation pattern of the machine-type communication service needs to be set so that communication is possible only for a predetermined time interval.
- the machine type communication terminal can be controlled so that communication is impossible for a time except a predetermined time.
- the wireless network may be controlled to prohibit connection to the wireless network of the machine-type communication terminal, to prevent the connection to the wireless network, or to prohibit transmission and reception of data only.
- the wireless network may transmit control information related to the creation of a connection with the wireless network to a machine type communication terminal.
- control information related to connection creation may include information about a situation in a congestion or traffic of a wireless network, information on barring, information on a random access delay distributed based on a time axis, or information on a preamble for random access. have.
- the wireless network may transmit control information related to connection creation using system information, paging, or using a broadcasting channel or a multicasting channel.
- the machine type communication terminal may receive control information related to connection creation using an existing identifier or a new identifier.
- a new RNTI value is assigned to a plurality of machine type communication terminals so that a plurality of machine type communication terminals assigned the same RNTI value can simultaneously receive control information related to connection creation. You can do that.
- the wireless network transmits control information related to connection creation to a plurality of machine type communication terminals, or transmits the control information related to connection creation by each service used by the machine type communication terminal, or divides them by session or subscription unit. Related control information can be transmitted.
- the machine type communication device may receive the same setting value as the existing terminal, but may perform other operations in combination with other setting values for the machine type communication device. For example, when a random time delay setting value is received in a random access system using a 3GPP wireless network, the machine type communication terminal multiplies or adds another value previously received from the wireless network to the random time delay setting value or another method. After change by using, the changed value can be operated with the set time delay set value.
- a new value such as MachineType or TimeControlled may be defined in the establishmentcause of the RRCConnectionRequest.
- the wireless network may send an RRCConnectionReject message to the machine type communication terminal.
- the T331 timer can be defined for the access barring mentioned above.
- the terminal receives the RRCConnectionReject as a response to the RRCConnectionRequest, it can start the T331 timer. If the machine-type communication terminal enters the RRC_CONNECTED state or successfully performs the cell selection / cell selection, the T331 timer is stopped. If the T331 timer expires, the machine type communication terminal may perform the RRCConnectionRequest again. That is, the T331 timer is a time taken to allow communication again in a preset wireless network.
- the wireless network may transmit an RRC message RRCConnectionRelease to the machine type communication terminal.
- a value such as predefinedtimeover indicating that the preset time expires in Releasecause or TimeControlledblocked indicating that the machine type communication terminal which operates only at a predetermined time should be stopped may be added.
- the machine-type communication terminal terminates the connection state (RRCConnectionRelease) and simultaneously operates the T331 to cut off the connection to the wireless network until a predetermined time and attempt to handover or reselect to another cell.
- the wireless network may assign a separate identifier (eg, RNTI for random access) to distinguish the machine type communication terminal 500 from the existing terminal.
- RNTI RNTI for random access
- the wireless network may assign the first identifier to the machine type communication terminal 500 and the second identifier to the existing terminal.
- the control information received by the machine type communication terminal may be a first identifier that is distinguished from the second identifier and assigned to the machine type communication terminal.
- the wireless network may set different random delay values for the machine type communication terminal 500 and the second terminal.
- the random delay value set for the machine type communication terminal is called a first random delay value
- the random delay value set for the second terminal is called a second random delay value.
- the wireless network may transmit the first random delay value along with the first identifier to the machine type communication terminal 500 and the second random delay value along with the second identifier to the second terminal.
- the transmitter may perform a random access procedure for the wireless network using the first random delay value.
- the machine type communication terminal 500 may perform random access to the wireless network using additional control parameters.
- the wireless network may transmit an arbitrary delay value commonly set for the machine type communication terminal 500 and the second terminal to the machine type communication terminal 500 and the second terminal.
- the second terminal may perform random access to the wireless network by using the received random delay value.
- the receiver 510 may further receive an additional control message from the wireless network.
- the transmitter 520 may generate a second random delay value based on the random delay value and the additional control message. For example, the transmitter 520 may generate a second random delay value by adding or multiplying a random delay value and an additional control message. In this case, the second random delay value may be greater than the random delay value. The transmitter may perform a random access procedure for the wireless network by using the generated second random delay value.
- the wireless network may allocate different random access preambles to the machine type communication terminal 500 and the second terminal.
- the wireless network may comprise a first random access preamble group consisting of first random access preambles available to the machine type communication terminal 500 and a second random access consisting of second random access preambles available to the second terminal.
- a preamble group can be created.
- the machine type communication terminal 500 may receive information on the first random access preambles from the wireless network.
- the transmitter 520 may perform random access to the wireless network using the first random access preamble
- the second terminal may perform random access to the wireless network using the second random access preamble. have.
- the machine type communication terminal 500 receives information on the time when the machine type communication terminal 500 performs a random access to the wireless network, and the transmission unit 520 is a machine type communication terminal 500 to the wireless network Random access may be performed at the time of performing random access. According to one side, the time when the machine-type communication terminal 500 performs the random access and the time when the second terminal performs the random access may be different time zones.
- the information on the first random access preamble may be transmitted using at least one of the RRC message, system information of the wireless network, paging message.
- Fig. 6 is a block diagram showing the structure of a machine type communication terminal according to another exemplary embodiment.
- the machine type communication terminal 600 includes a network address storage 610, a controller 620, a receiver 630, and a transmitter 640.
- the network address storage unit 610 stores a network address assigned to the machine type communication terminal 600.
- the machine type communication terminal 600 and the second machine type communication terminals 660 and 670 may be assigned the same network address.
- the receiving unit 630 receives a communication request including a network address from the machine type communication server 650.
- the communication request is a data transmission request for machine type communication terminals 600, 660, 670 assigned a network address included in the communication request.
- the controller 620 compares the network address included in the communication request with the network address of the machine type communication terminal 600 stored in the network address storage 610. If the network address included in the communication request and the network address of the machine type communication terminal 600 stored in the network address storage unit 610 are the same, the communication request is a data transmission request for the machine type communication terminal 600.
- the transmitter 640 may transmit data to the machine type communication server 650. If the second device type communication terminal 660, 670 transmits the second data to the machine type communication server 650 instead of the machine type communication terminal 600, the transmitter 640 may not transmit the data. Can be.
- each machine type communication terminal 600, 660, 670 may have a unique identifier, or a unique network address.
- machine type communication server 650 may broadcast or multicast data requests for multiple machine type communication terminals 600, 660, 670.
- only one machine type communication terminal among the plurality of machine type communication terminals 600, 660, 670 may transmit data in response to the data request. This may be referred to as a multiple device push method.
- a separate identifier (such as RNTI) may be used to identify the machine type communication devices 600, 660, 670 as a group.
- Fig. 7 is a block diagram showing the structure of a machine type communication server according to another exemplary embodiment.
- the machine type communication server 700 includes a transmitter 710, a controller 720, and a receiver 730.
- the transmitter 710 transmits a communication request to the plurality of machine type communication terminals 740, 750, and 760 having the same network address.
- the communication request includes a network address.
- the communication request is a data transmission request for machine type communication terminals assigned a network address included in the communication request.
- the receiving unit 720 includes at least one of the machine type communication terminals 740, 750, and 760. Data may be received in response to a communication request from one or more communication terminals.
- the communication procedure may be terminated even if data is not received from all the machine type communication terminals.
- the receiver 730 may receive the characteristic information of each of the machine type communication terminal (740, 750, 760) from the machine type communication terminal (740, 750, 760).
- the characteristic information may include information on the type of machine type communication terminals 740, 750, 760, and the function of the machine type communication terminals 740, 750, 760.
- the transmitter 710 transmits the control information generated in consideration of the characteristic information of the machine type communication terminals 740, 750, and 760 to the machine type communication terminals 740, 750, and 760.
- control information may be a deactivation command for at least one or more of the functions of the machine type communication terminals (740, 750, 760).
- the machine type communication terminal which has not received the deactivation command can still maintain its function, so that it can operate preferentially over the machine type communication terminal which has received the deactivation command.
- the control information may be a measurement threshold determined to increase the radio channel measurement period of the machine type communication terminal 740, 750, 760.
- the machine type communication terminal 740, 750, 760 may compare the radio channel measurement result with the measurement threshold and determine the next radio channel measurement time according to the comparison result.
- the radio channel measurement period may be changed according to the value of the measurement threshold.
- the controller 720 may change the radio channel measurement period of the machine type communication terminal 740, 750, 760 by changing the value of the measurement threshold. As the radio channel measurement period increases, the battery life of the machine type communication terminals 740, 750, 760 may increase.
- the characteristic information may include whether data transmitted by the machine type communication terminal 740, 750, 760 to the machine type communication server 700 is sensitive to time delay.
- the machine type communication server 700 controls a plurality of machine type communication terminals, and the data from the machine type communication terminals 740, 750, and 760 are congested and bandwidth is limited, the transmitter 710 is partially
- the server connection restriction command can be received as the control information for the machine type communication terminals 740 and 750.
- the machine type communication terminal 760 may preferentially transmit data.
- FIG. 8 is a diagram illustrating a step-by-step procedure of exchanging control information for wireless network access of a machine type communication terminal.
- the machine type communication terminal 810 may connect to the wireless network after exchanging a series of control information with the wireless network.
- data transmission may be performed after accessing the wireless network.
- the machine type communication terminal 810 connects to the base station 820. Further, in step 861, the base station 820 requests the MME to provide a service to the machine type communication terminal 810, and in step 862, the MME sets up initial control for providing the service.
- control and data information can be transmitted and received using a preset security setting.
- the control information required for integrity, ciphering, etc. may be inserted in the manufacturing process of the machine type communication terminal 810, set upon initial access to the base station 820, or through downlink control information such as paging and system information. Can be sent.
- the security level of the machine type communication terminal 810 may be determined as a default value, and functions such as integrity and ciphering may be limited.
- the machine type communication terminal 810 may receive additional parameters for setting a higher security level, in which case the functionality such as integrity or ciphering may not be limited. Since the basic parameters have been received in advance in steps 851 to 853, the steps 863 to 864 may be simply performed.
- the machine type communication terminal 810 may be classified into three security levels according to the degree of security requirements of the data to be transmitted.
- Machine type communication terminal has 1) security level that requires thorough security, 2) security required, but security level that does not cause serious error in the system even if security problem occurs, and 3) security level that does not require any security at all. Can be distinguished.
- the machine type communication terminal may perform different procedures in radio interval setting, radio resource allocation, and the like.
- the machine-type communication terminal 810 such as integrity or ciphering in the step (871, 872) or the step of reestablishing the RRC connection after the security setting step (863, 864) after the completion of the RRC connection Control information for performing the function may be included in a radio section setting message or an RRC connection reconfiguration message.
- the machine-type communication terminal 810 receives the integrity-related information in the step for RRC connection (steps 851 to 853), and the ciphering-related information for the radio section setting (step ( 871 to 872).
- the reverse is also possible.
- the machine type communication terminal 810 may not perform any security setting. For example, while performing the random access procedure in steps 851 to 853, if the base station 820 or the MME 830 confirms that the terminal is a machine type communication terminal, the base station 820 or the MME 830 You can determine that no security settings are required. In this case, the machine type communication terminal 810 can transmit and receive data without setting integrity or ciphering.
- data transmission of the machine type communication terminal 810 may be performed periodically.
- the machine type communication terminal 810 must repeat the connection and release to the base station 820 or the wireless network each time.
- the initial connection of the machine type communication terminal 810 may connect to the base station 820 or the wireless network as shown in steps 851 to 852.
- the machine type communication terminal 810 may attempt to connect through the RRCConnectionReestablishment procedure after the initial connection without attempting to connect using the RRCConnectionRequest message. That is, the machine type communication terminal 810 inserts a parameter indicating that the connection is by the machine type communication terminal into the message, or inserts a parameter indicating that the connection is already connected by the terminal to the message to connect the RRCConnectionReestablishment procedure to the network. Can be used as a procedure for
- the base station 820 and the machine type communication terminal 810 store the settings that were used in the previous connection and can easily connect using the stored settings.
- the machine type communication terminal 810 If the machine type communication terminal 810 needs to be reset due to a change in the encryption algorithm or the like, the machine type communication terminal 810 performs the access procedure again from the security setting procedure (steps 871 to 872). can do. Or in this case, the base station 820 may reject the attempted connection of the machine type communication terminal 810.
- the base station 820 may inform the machine type communication terminal 810 of the cause of the rejection, and the machine type communication terminal 810 denied the connection may try to access again after a predetermined time.
- the base station 820 and the machine type communication terminal 810 may store the configuration information by using a specific release cause at the time of the RRCConnectionRelease.
- the machine type communication terminal may require a reception synchronization or a transmission synchronization acquisition procedure before the machine type communication terminal transmits data. If a synchronization acquisition procedure is required, the machine type communication terminal may transmit data after synchronization acquisition.
- Radio resources for the machine type communication terminal to transmit data may be allocated on a contention-based or non-competition basis. Radio resources allocated on a non-competitive basis may transmit data by the machine type communication terminal occupying the radio resource exclusively or exclusively. Radio resources allocated on a contention basis are shared by machine type communication terminals with other machine type communication terminals or other terminals to transmit data. Radio resources allocated on a contention basis have a possibility of collision and contention.
- contention-based radio resource allocation is similar to that of radio resource allocation for a random access procedure in a cellular system. Therefore, in the case of allocating contention-based radio resources, it is necessary to transmit information about radio resources that can be used on a contention basis by the wireless network so that the machine-type communication terminals can recognize before transmitting data.
- the wireless network includes information on whether contention-based uplink transmission is possible in a specific subframe or a subframe capable of data transmission using a contention-based uplink transmission method.
- Information on the machine can be transmitted to the machine type communication terminal.
- the machine type communication terminal may transmit data to the wireless network using a contention-based uplink transmission scheme in a corresponding subframe.
- the 3GPP wireless network may allocate separate radio resources to transmit packet information in a competitive manner on the uplink.
- the machine type communication terminal may transmit a packet to the wireless network in a competitive manner using the allocated radio resource.
- the wireless network may be limited to use the contention-based uplink transmission scheme only for the machine type terminal that maintains or obtained the uplink physical layer transmission synchronization. However, if the system permits, the wireless network can use a contention-based uplink transmission scheme even for a machine type communication terminal that does not maintain and acquire the uplink physical layer transmission benefit.
- Radio resource allocation of the machine type communication terminal using the RACH procedure may be limited so as not to affect the RACH procedure of the existing terminal.
- the wireless network may designate a group of preambles available to the machine type communication terminal among the RACH preambles.
- the group of preambles can be changed.
- the wireless network may use system information, RRC message, MAC information, etc. to transmit information about the group of preambles to the machine type communication terminal.
- the machine type communication terminal when the machine type communication terminal transmits the RACH preamble, the machine type communication terminal may transmit information indicating that the machine is a RACH preamble transmitted from the machine type communication terminal. Since the wireless network can distinguish between the RACH preamble transmitted by the machine type communication terminal and the RACH preamble transmitted by the existing terminal, the wireless network may not affect the RACH procedure of the existing terminal.
- the wireless network may limit the connection success rate of the machine-type communication terminal at the eNB during the RACH procedure so as not to affect the RACH procedure of the existing terminal. For example, when the Contention Resolution procedure is performed, the connection setting of the existing terminal has a higher priority than the connection setting of the machine type communication terminal so that the existing terminal is not affected.
- the wireless network can efficiently distribute the radio resources so that both the machine type communication terminal and the existing terminal can perform the random access.
- a wireless network may distinguish between radio resources for which a machine type communication terminal performs random access and radio resources for which an existing terminal performs random access.
- the wireless network may allocate the same radio resource to the machine type communication terminal and the existing terminal, and the machine type communication terminal and the existing terminal may perform random access by changing setting values and the like.
- the wireless network may define new RNTI values for machine type communication terminals. In this case, since the machine type communication terminal and the existing terminal use the same radio resource but use different RNTI values, each machine can perform random access.
- the machine type communication terminal may check the RNTI for performing the random access before performing the random access.
- the wireless network may allocate a predetermined time interval to the machine type communication terminal. When a radio resource for random access is allocated, the machine type communication terminal does not perform random access immediately, but may perform random access after a certain time in the time interval based on the time interval allocated to the machine type communication terminal. Can be.
- the wireless network may transmit information on the time interval allocated to the machine type communication terminal using an RRC message, system information, and the like.
- the machine type communication terminal may calculate information on a time interval allocated to the machine type communication terminal using another value received from the wireless network.
- machine type communication terminals may select and receive any of RNTIs for random access and determine any delay time based on the received RNTI.
- the machine type communication terminal may communicate with a wireless network using a physical layer having unique characteristics.
- a machine type communication device may communicate with a wireless network using a unicast subframe like a conventional terminal.
- the existing terminal and the machine type communication terminal may share the same radio resource.
- the machine type communication terminal may communicate with the wireless network by using an MBSFN subframe or by using a subframe configured for the machine type communication terminal.
- the machine type communication terminal may communicate with a wireless network by mixing different subframes according to characteristics of data to be transmitted.
- the data transmission or control signal transmission of the machine-type communication terminal may be performed in a combination of one or more of unicast, multicast, and broadcast.
- an existing channel (logical channel: MCCH, MTCH, transport channel: MCH, physical channel: PMCH) can be utilized or a new channel can be configured and transmitted.
- control information for the machine type communication terminal may be transmitted using system information for transmitting control information for the machine type communication terminal or broadcast control information.
- the machine type communication terminal may be in a state capable of receiving only broadcast control information, system information, or control information transmitted using PBCH and PMCH.
- at least one machine type communication terminal may be controlled to connect to a communication network or transmit data.
- the wireless network may classify the machine type communication terminal into at least one multicast channel group based on the location information of the machine type communication terminal. In this case, the wireless network may multicast control information to machine type communication terminals included in a specific multicast channel group.
- control information may be transmitted without limitation, and may be transmitted repeatedly for a predetermined time interval to increase the stability of the reception.
- control information is transmitted to all machine type communication terminals, but only some machine type communication terminals can process the control information to perform a designated operation.
- a terminal for processing control information or data can be designated using an identifier of a group of machine type communication terminals, an identifier of a machine type communication terminal, etc. to identify a destination of control information and data.
- the wireless network may transmit information on the index of the subframe that a specific machine type communication terminal can access to the machine type communication terminal using a control message.
- the control message may be system information of the base station 820, a broadcast message for the machine type communication terminal, or a dedicated control message for the specific machine type communication terminal.
- retransmission may be applied in the physical layer using H-ARQ.
- an improved coding scheme may be applied to repeatedly transmit control information having the same content or to obtain an encoding gain using radio resources allocated continuously or repeatedly.
- a machine type communication terminal may not be activated for most of the time, and may only need to transmit a small amount of data even when the communication is activated. Since the amount of control information can be much larger than the data to be transmitted, the machine type communication terminal can transmit the control information and data in piggybacked form.
- the wireless network can efficiently set radio resources.
- FIG. 9 is a diagram illustrating a communication scheme in which a plurality of machine type communication terminals in the same group have their own radio bearers in a radio access section and share one radio bearer after the base station.
- the wireless network may define an identifier to manage the group.
- the wireless network may classify machine type communication terminals according to various characteristics of the machine type communication terminal. For example, depending on the type of machine type communication terminal, the user of the machine type communication terminal, the characteristics of the data transmitted and received by the machine type communication terminal, the machine type depending on the quality of service used by the machine type communication terminal, etc. Communication terminals can be distinguished.
- the machine-type communication terminals included in the same group may have a radio bearer of each machine-type communication terminal in the radio access section, and may share one radio bearer after the base station.
- machine type communication terminals 910, 920, and 930 included in the same group may transmit data to the base station 950 using radio bearers 941, 942, and 943 allocated to them.
- the base station 950 may maintain a list of machine type communication terminals included in a particular machine type communication terminal group. Alternatively, the base station 950 may receive and store information of the machine type communication terminals 910, 920, and 930 from a higher network entity such as an MME or an HSS based on the subscription information.
- a higher network entity such as an MME or an HSS
- the base station 950 when the machine type communication terminals 910, 920, and 930 included in the same group perform uplink transmission using their radio bearers 941, 942, and 943, the corresponding radio bearers 941, 942. 943 and the bearers 951 and 961 of S1 or higher.
- the base station 950 receives downlink data using S1 or more bearers 951 and 961 used by a group of machine type communication terminals
- the machine type communication terminals 910, 920, and 930 included in the group can find a suitable terminal and transmit data or a paging to a corresponding radio bearer.
- the base station 950 is the bearer (951, 961) of S1 or more Can be set as a bearer for a group. That is, S1 or more bearers 951 and 961 set by the machine-type communication terminal performing network connection first in the group may be set to S1 or more bearers 951 and 961 for the group.
- the base station 950 does not cancel the bearers 951 and 961 of S1 or more, but releases only the bearers 941, 942 and 943 of the radio access portion. can do. Thereafter, the machine type communication terminals connecting to the network can simply connect to the network by setting only the bearers 941, 942, 943 of the radio connection portion.
- the base station 950 may delete the S1 or more bearers (951, 961) when the S1 or more bearers (951, 961) is not used for more than a predetermined time.
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Abstract
Description
Claims (22)
- 기계 타입 통신 단말기에 있어서,기계 타입 통신 서버로 상기 기계 타입 통신 단말기의 특성 정보를 기계 타입 통신 서버로 전송하는 전송부; 및상기 기계 타입 통신 단말기의 특성 정보에 응답하여 상기 기계 타입 통신 단말기의 특성을 고려한 제어 정보를 상기 기계 타입 통신 서버로부터 수신하는 수신부;를 포함하는 기계 타입 통신 단말기.
- 제1항에 있어서,상기 전송부는 RRC 메시지에 상기 특성 정보를 포함하여 전송하는 기계 타입 통신 단말기.
- 제1항에 있어서,상기 특성 정보는 상기 기계 타입 통신 단말기의 유형, 상기 기계 타입 통신 단말기의 기능에 대한 정보를 포함하는 기계 타입 통신 단말기.
- 제1항에 있어서,상기 제어 정보는 상기 기계 타입 통신 단말기의 무선 채널 측정 주기가 증가하도록 결정된 측정 임계치인 기계 타입 통신 단말기.
- 제1항에 있어서,상기 특성 정보는 상기 데이터가 시간 지연에 대하여 민감한지 여부를 포함하고,상기 제어 정보는 상기 특성 정보를 고려하여 결정된 상기 기계 타입 통신 서버에 대한 접속 제한 명령인 기계 타입 통신 단말기.
- 제1항에 있어서,상기 제어 정보는 상기 기계 타입 통신 단말기의 기능 중에서 적어도 하나의 기능에 대한 비활성화 명령인 기계 타입 통신 단말기.
- 제1항에 있어서,상기 특성 정보는 상기 기계 타입 통신 단말기가 상기 기계 타입 통신 서버로 전송하는 데이터의 전송 시간 지연에 대한 민감성(delay-tolerant)에 대한 정보인 기계 타입 통신 단말기.
- 제7항에 있어서,RRC 설정 요청에 응답하여 RRC 설정 거부(RRC Connection Reject) 메시지를 수신한 경우에,상기 전송부는 소정의 시간 구간 이후에 상기 RRC 설정 요청을 재전송하는 기계 타입 통신 단말기.
- 제1항에 있어서,상기 제어 정보는 상기 기지국에 임의 접속을 수행하는 제2 단말기에 대하여 할당된 제2 임의 접속 프리앰블들과 구분되어 상기 기계 타입 통신 단말기에 할당된 제1 임의 접속 프리앰블들에 대한 정보이고,상기 전송부는 상기 제1 임의 접속 프리앰블을 이용하여 상기 기지국에 대한 임의 접속 절차를 수행하는 기계 타입 통신 단말기.
- 제9항에 있어서,상기 제어 정보는 RRC 메시지, 상기 기지국의 시스템 정보, 페이징 메시지 중에서 적어도 하나 이상을 이용하여 전송되는 기계 타입 통신 단말기.
- 제9항에 있어서,상기 제어 정보는 상기 임의 접속 절차를 수행할 시간에 대한 정보를 포함하는 기계 타입 통신 단말기.
- 제1항에 있어서,상기 제어 정보는 상기 기지국에 임의 접속을 수행하는 제2 단말기에 대하여 할당된 제2 식별자와 구분되어 상기 기계 타입 통신 단말기에 할당된 제1 식별자이고,상기 수신부가 상기 기지국으로부터 상기 제1 식별자와 함께 전송된 임의 지연 값을 수신한 경우에,상기 전송부는 상기 제1 식별자와 함께 전송된 임의 지연 값을 이용하여 상기 기지국에 대한 임의 접속 절차를 수행하는 기계 타입 통신 단말기.
- 제1항에 있어서,상기 제어 정보는 상기 기지국에 임의 접속을 수행하는 제2 단말기에 대하여 설정된 임의 지연 값이고,상기 수신부는 상기 기지국으로부터 추가 제어 메시지를 더 수신하고,상기 전송부는 상기 임의 지연 값과 상기 추가 제어 메시지에 기반하여 생성된 제2 임의 지연 값을 이용하여 상기 기지국에 대한 임의 접속 절차를 수행하는 기계 타입 통신 단말기.
- 기계 타입 통신 단말기에 있어서,제2 기계 타입 통신 단말기의 네트워크 주소와 동일한 상기 기계 타입 통신 단말기의 네트워크 주소를 저장하는 네트워크 주소 저장부를 포함하는 기계 타입 통신 단말기
- 제14항에 있어서,기계 타입 통신 서버로부터 네트워크 주소를 포함하는 통신 요청을 수신하는 수신부;상기 통신 요청에 포함된 네트워크 주소와 상기 기계 타입 통신 단말기의 네트워크 주소를 비교하는 제어부; 및상기 통신 요청에 포함된 네트워크 주소와 상기 기계 타입 통신 단말기의 네트워크 주소가 동일한 경우에, 상기 기계 타입 통신 서버로 데이터를 전송하는 전송부를 포함하는 기계 타입 통신 단말기.
- 제15항에 있어서,상기 제2 기계 타입 통신 단말기가 상기 통신 요청에 응답하여 제2 데이터를 상기 기계 타입 통신 서버로 전송한 경우에, 상기 전송부는 상기 데이터를 전송하지 않는 기계 타입 통신 단말기.
- 동일한 네트워크 주소를 가지는 복수의 기계 타입 통신 단말기들로 통신 요청을 전송하는 전송부; 및상기 복수의 기계 타입 통신 단말기들 중에서 적어도 하나 이상의 통신 단말기로부터 상기 통신 요청에 응답하여 데이터를 수신하고, 상기 데이터의 수신에 따라서 통신 절차를 종료하는 수신부를 포함하는 기계 타입 통신 서버.
- 제17항에 있어서,상기 수신부는 상기 기계 타입 통신 단말기들로부터 상기 기계 타입 통신 단말기들의 특성 정보를 수신하고,상기 전송부는 상기 기계 타입 통신 단말기의 특성 정보를 고려하여 생성된 제어 정보를 상기 기계 타입 통신 단말기들로 전송하는 기계 타입 통신 서버.
- 제18항에 있어서,상기 특성 정보는 상기 기계 타입 통신 단말기들의 유형, 상기 기계 타입 통신 단말기들의 기능에 대한 정보를 포함하는 기계 타입 통신 서버.
- 제19항에 있어서,상기 제어 정보는 상기 기계 타입 통신 단말기들의 기능 중에서 적어도 하나의 기능에 대한 비활성화 명령인 기계 타입 통신 서버.
- 제17항에 있어서,상기 기계 타입 통신 단말기의 무선 채널 측정 주기가 증가하도록 측정 임계치를 결정하는 제어부를 더 포함하고,상기 전송부는 상기 측정 임계치를 상기 기계 타입 통신 단말기로 전송하는 기계 타입 통신 서버.
- 제18항에 있어서,상기 특성 정보는 상기 데이터가 시간 지연에 대하여 민감한지 여부를 포함하고,상기 특성 정보를 고려하여 상기 복수의 기계 타입 통신 단말기들 중에서 적어도 하나의 기계 타입 통신 단말기에 대한 접속 제한 명령을 상기 제어 정보로 생성하는 제어부를 포함하는 기계 타입 통신 서버.
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| ES11731935T ES2751331T3 (es) | 2010-01-06 | 2011-01-06 | Sistema de comunicación de tipo máquina |
| US13/520,837 US20130028184A1 (en) | 2010-01-06 | 2011-01-06 | Machine type communication system |
| EP11731935.0A EP2523366B1 (en) | 2010-01-06 | 2011-01-06 | Machine type communication system |
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| CN201180012671.4A CN102792611B (zh) | 2010-01-06 | 2011-01-06 | 机器类型通信系统 |
| US16/000,572 US20180302784A1 (en) | 2010-01-06 | 2018-06-05 | Machine type communication system |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2013516887A (ja) | 2013-05-13 |
| KR20110081100A (ko) | 2011-07-13 |
| EP2523366A2 (en) | 2012-11-14 |
| ES2751331T3 (es) | 2020-03-31 |
| EP2523366B1 (en) | 2019-08-07 |
| WO2011083997A3 (ko) | 2011-11-24 |
| CN102792611A (zh) | 2012-11-21 |
| EP3579591A1 (en) | 2019-12-11 |
| EP2523366A4 (en) | 2017-04-26 |
| CN102792611B (zh) | 2015-11-25 |
| KR101477518B1 (ko) | 2014-12-30 |
| JP5599900B2 (ja) | 2014-10-01 |
| US20180302784A1 (en) | 2018-10-18 |
| US20130028184A1 (en) | 2013-01-31 |
| PL2523366T3 (pl) | 2020-02-28 |
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