WO2011120444A1 - Procédé de détection hors ligne, et appareil et système pour un dispositif de communication de type machine - Google Patents

Procédé de détection hors ligne, et appareil et système pour un dispositif de communication de type machine Download PDF

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Publication number
WO2011120444A1
WO2011120444A1 PCT/CN2011/072375 CN2011072375W WO2011120444A1 WO 2011120444 A1 WO2011120444 A1 WO 2011120444A1 CN 2011072375 W CN2011072375 W CN 2011072375W WO 2011120444 A1 WO2011120444 A1 WO 2011120444A1
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Prior art keywords
mtc device
information
offline
offline state
base station
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PCT/CN2011/072375
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English (en)
Chinese (zh)
Inventor
赵锐
房家奕
赵毅
李凤
王琳
艾明
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电信科学技术研究院
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Publication of WO2011120444A1 publication Critical patent/WO2011120444A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/25—Maintenance of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor

Definitions

  • the present invention relates to the field of communication technologies, and in particular to a method, device and system for offline detection of a Machine Type Communications (MTC) device.
  • MTC Machine Type Communications
  • Machine-to-machine (M2M) communication is a new communication concept. Its purpose is to combine many different types of communication technologies, such as: machine-to-machine communication, machine control communication, human-computer interaction communication, Mobile internet communication to promote social production and lifestyle development. It is expected that the future human-to-human communication business may only account for 1/3 of the entire terminal market, and a larger number of communications is inter-machine (M2M) communication services.
  • M2M Machine-to-machine
  • An actual MTC terminal may have some of a variety of MTC characteristics, such as low data volume, time controllable, low mobility, low power loss, only PS (Packet Switched) domain, offline indication, interference Instructions and so on.
  • MTC characteristics such as low data volume, time controllable, low mobility, low power loss, only PS (Packet Switched) domain, offline indication, interference Instructions and so on.
  • the main application scenarios are different from human-to-human (H2H) communication, because the MTC device may be under long-term unmanned monitoring conditions, between the device and the network.
  • H2H human-to-human
  • the system needs to be able to actively detect the status of the device and report it to the phase.
  • the network element entity is closed so that the network can take corresponding countermeasures.
  • MAX-T-Detect the maximum offline indication detection time, that is, the time from the actual occurrence of the connection interruption to the detection of the connection interruption, hereinafter referred to as MAX-T-Detect, which requires the system to detect the MTC during the offline indication detection period.
  • the length of the offline indication detection time may be 1 minute to 1 hour, which is included in the MTC subscription information.
  • the offline status detection and notification policies for MTC devices are as follows:
  • One is a method initiated periodically by the network side, for example, through a paging process, triggering offline detection of the MTC device through a periodic paging process on the network side;
  • One is a method initiated periodically by the terminal side, such as an upper process of a Tracking area update (TAU).
  • TAU Tracking area update
  • the network sends a large number of pagings. To find the user equipment (UE, User Equipment), the air interface and the S1 interface are too expensive.
  • UE User Equipment
  • the process of the service request (service request) of the paging response is complex, including the activation of the EPS (Evolved Packet System) bearer and the activation of the access layer security.
  • the periodic TAU process is simple and does not involve these complex operations.
  • the inventor has obtained a process of periodically initiating a TAU process for a terminal in a radio resource control (RRC) idle state, and the periodic timer is at an hourly level.
  • RRC radio resource control
  • the offline state detection can be performed by using the existing TAU reporting method. If the core network does not receive the current MTC device cycle. The TAU of the sexual report, the current user is considered to be offline.
  • MAX-T-Detect is at the minute level, let the periodic time of TAU be equal to MAX-T-Detect, which will greatly increase the network resources and cause network congestion. Therefore, right At MAX-T-Detect, the terminal at the minute level cannot be offline detected in the idle state (Idle), and offline detection is required in the connected state.
  • the invention provides an offline detection method, device and system for an MTC device, which are used for offline detection of an MTC device in a connected state.
  • the base station detects the time information of the maximum offline state of the obtained MTC device, configures the uplink information that is periodically reported for the MTC device, and the MTC device is in the connected state, and sends the configured uplink information that is periodically reported to the MTC device. ;
  • the base station If the MTC device is offline, the base station notifies the MTC server of the offline status of the MTC device through the core network.
  • the MTC device in the connected state receives the uplink information periodically reported by the base station;
  • the MTC device periodically sends an uplink signal to the base station according to the periodically reported uplink information.
  • An offline detection and control method for an MTC device according to an embodiment of the present invention includes the following steps:
  • the core network After receiving the maximum offline state detection time information of the MTC device sent by the MTC server, the core network determines that the MTC device belongs to a user whose time requirement is urgent, and then pages the MTC device to establish a connection with the MTC device.
  • the core network sends the maximum offline state detection time information of the MTC device to the base station, where the maximum offline state detection time information of the MTC device is used for providing offline detection to the base station;
  • the core network notifies the MTC server of the information that the MTC device obtained by the base station is offline.
  • An off-line detecting device for a machine type communication MTC device according to an embodiment of the present invention, the device includes:
  • a configuration unit configured to detect time information according to the obtained maximum offline state of the MTC device
  • the MTC device configures the uplink information that is periodically reported, and the MTC device is in a connected state, and sends the configured uplink information that is periodically reported to the MTC device.
  • a determining unit configured to determine, according to the received status of the uplink signal periodically reported by the MTC device, whether the MTC device is in an offline state
  • the notification unit is configured to notify the core network that the MTC device is in an offline state if the MTC device is in an offline state.
  • connection control unit configured to establish a connection with the network side according to the paging on the network side
  • the receiving unit is configured to receive the uplink information that is periodically reported by the base station in the connected state, and the reporting unit is configured to periodically send the uplink signal to the base station according to the periodically reported uplink information in the connected state.
  • the control unit is configured to: after receiving the maximum offline state detection time information of the MTC device sent by the MTC server, determine that the MTC device belongs to a user whose time requirement is urgent, and then page the MTC device to establish a connection with the MTC device;
  • the offline detection system includes: a core network and a base station, where the core network is configured to receive the maximum offline state detection time information of the MTC device sent by the MTC server, and determine that the MTC device belongs to the time requirement.
  • the emergency user then pages the MTC device and establishes a connection with the MTC device; sends the maximum offline state detection time information of the MTC device to the base station; and notifies the MTC server of the information that the MTC device obtained from the base station is offline.
  • the base station is configured to: according to the obtained offline state detection time information of the MTC device, configure the uplink information that is periodically reported for the MTC device, and send the configured uplink information that is periodically reported to the MTC device; according to the received
  • the status of the uplink signal periodically reported by the MTC device determines whether the MTC device is in an offline state. If the MTC device is in an offline state, the MTC server is notified by the core network that the MTC device is offline.
  • the base station obtains the maximum offline state detection time information of the MTC device, configures the uplink information periodically reported by the MTC device according to the maximum offline state detection time information of the MTC device, and periodically reports the configuration.
  • the uplink information is sent to the MTC device; the base station determines whether the MTC device is in an offline state according to the received status of the uplink signal periodically reported by the MTC device; if the MTC device is in an offline state, the base station is located in the core network through the core network.
  • the information of the offline state is notified to the MTC server, so that offline detection is performed in time for the MTC device in the connected state.
  • FIG. 1 is a schematic flowchart of a method for offline detection of an MTC device according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a method for reporting an uplink signal by an MTC device according to an embodiment of the present invention
  • FIG. 4 is a schematic flowchart of a specific implementation manner of implementing off-line detection according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of an offline detection apparatus for an MTC device according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of an MTC device for reporting an uplink signal according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of an offline detection and control device for an MTC device according to an embodiment of the present invention
  • FIG. 8 is a schematic structural diagram of an offline detection system according to an embodiment of the present invention.
  • the base station obtains the maximum offline state detection time information of the MTC device according to the maximum offline state detection time information of the MTC device, and configures the MTC device configuration period according to the maximum offline state detection time information of the MTC device.
  • the uplink information that is reported is sent to the MTC device; and the base station determines whether the MTC device is offline according to the status of the received uplink signal periodically reported by the MTC device; The device is offline, and the base station notifies the MTC server of the information that the MTC device is offline through the core network.
  • an offline detection method for an MTC device may include the following steps:
  • Step 101 The base station detects the time information of the maximum offline state of the obtained MTC device, configures the uplink information periodically reported for the MTC device, and sends the configured uplink information that is periodically reported to the MTC device, where the MTC device is located. Connection Status.
  • the manner in which the base station obtains the maximum offline state detection time information of the MTC device may be the maximum offline state detection time information of the MTC device that is sent by the core network, or may be obtained from the source base station of the MTC device if the MTC device switches. Maximum offline status detection time information of the MTC device.
  • the specific implementation manner may be: the base station receives the maximum offline state detection time information of the MTC device by using the S1 connection of the MTC device, and may also pass other The connection receives the maximum offline state detection time information of the MTC device.
  • the context message of the S1 connection includes an information field about the maximum offline state detection time
  • the base station receives the information field of the MTC device by using an information field about the maximum offline state detection time in the context message of the S1 connection of the MTC device.
  • the periodically reported uplink information may include: the reported uplink signal type and transmission mode information.
  • the reported uplink signal type may include: one or more of a periodic sounding dedicated pilot signal, a periodic CQI feedback signal, and a periodic BSR reporting signal.
  • the transmission mode information includes: a reporting period and a subframe, an SRS duration, a ZC sequence that distinguishes the user, an SRS bandwidth, and whether the frequency hopping information is included. One or more.
  • the transmission mode information includes: a resource, a feedback period, and a subframe of a physical uplink control channel PUCCH occupied by the CQI feedback.
  • the transmission mode information may further include: a period and a subframe indicating the RI feedback.
  • the transmission mode information includes: a reporting period.
  • the reporting period may be based on the maximum offline state detection time information of the MTC device, and the set time of the maximum offline state detection time of the MTC device is not continuously received by the MTC device.
  • the number of times the uplink signal is configured.
  • Step 102 The base station determines whether the MTC device is in an offline state according to the received status of the uplink signal periodically reported by the MTC device.
  • the MTC device determines whether the MTC device is in the Offline status, including:
  • the MTC device During the maximum offline state detection time of the MTC device, if the number of times that the uplink signal periodically reported by the MTC device is not received exceeds the set threshold value, the MTC device is determined to be offline, otherwise, the MTC device is determined to be absent. Offline.
  • Step 103 If the MTC device is offline, the base station notifies the MTC server of the information that the MTC device is offline through the core network.
  • the base station notifies the MTC server of the information that the MTC device is offline through the core network.
  • the information may be: the base station sends the information that the MTC device is offline to the core network; and the core network sends the information that the MTC device is offline to the MTC server.
  • the base station can send the information of the MTC device in the offline state to the core network in this manner: the base station sends the identifier of the MTC device in the offline state to the core network in the set time period, where the MTC device identifier determined in step 102 is included. For example, send the ID of all offline MTC devices to the core network. It is also possible to directly send the information that the MTC device is offline to the core network.
  • a method for reporting an uplink signal by an MTC device includes the following steps:
  • Step 201 The MTC device in the connected state receives the periodically reported uplink information configured by the base station.
  • the received uplink information of the received base station configuration is the same as that of the embodiment shown in FIG. 1, and details are not described herein again.
  • Step 202 The MTC device periodically sends a uplink signal to the base station according to the periodically reported uplink information.
  • an offline detection control method for an MTC device includes the following steps:
  • Step 301 After receiving the maximum offline state detection time information of the MTC device sent by the MTC server, the core network determines that the MTC device belongs to a user whose time is urgent. If the maximum offline state detection time of the MTC device is determined to be less than a set threshold, Then, the MTC device is paged, and a connection is established with the MTC device.
  • Step 302 The core network sends the maximum offline state detection time information of the MTC device to the base station, where the maximum offline state detection time information of the MTC device is used for offline detection.
  • Step 303 The core network notifies the MTC server of the information that the MTC device obtained by the base station is offline.
  • Step 401 The core network receives the maximum offline state detection time requirement (MAX_T_Detect) of the subscription user of the current MTC device sent by the MTC server or the MTC User, if the time requirement is detected according to the maximum offline state (MAX_T— Detect ), determining that the subscriber of the MTC device is a user with relatively tight time requirements (for example, a minute level), and the core network makes the MTC device enter the connected state by means of paging on the network side.
  • MAX_T_Detect the maximum offline state detection time requirement of the subscription user of the current MTC device sent by the MTC server or the MTC User
  • Step 402 The core network notifies the base station side of the current offline state detection time requirement of the MTC device subscription user (MAX_T_Detect), and the corresponding maximum offline state detection time requirement is notified to the base station through the S1 connection based on the UE (MTC device). On the side, it is necessary to add an information field about the maximum offline state detection time in the context message of the S1 connection between the core network and the base station side.
  • the target eNB may acquire the offline detection time requirement (MAX_T_detect) of the MTC device from the source eNB.
  • Step 403 After receiving the requirement of the maximum offline state detection time (MAX T Detect ) of the current MTC device, the base station side configures different periodic reports for the current MTC device according to the requirement of the maximum offline state detection time (MAX_T_Detect).
  • Uplink information, its period (T) is related to the time requirement of offline detection of the MTC device and the value of the counter (N) in step 404.
  • the principle of the period setting is generally ⁇ ⁇ T ⁇ MAX T Detect, and the main configuration periodically performs uplink.
  • the way of transmission is 3 ⁇ 4:
  • SRS Sounding reference signal
  • RS dedicated pilot
  • SRS -configindex used to indicate the period and subframe of the SRS transmission, this depends on the cell's SRS-subframeconfig configuration
  • SRS duration single or indefinite
  • user's cyclic shift distinguishing user's ZC (Zadoff) -Chu ) sequence
  • the SRS transmission period can be: 2 ⁇ 320ms.
  • Example 2 PUCCH (Periodic CQI Feedback): For Channel Quality Indication (CQI, Channel Quality Indication) / Precoding Matrix Indication (PMI) / Rank Indication (RI, Rank Indication) in PUCCH feedback of,
  • the RRC layer also needs to configure related Per UE parameters, for example: CQI-PUCCH-resourceindex (indicating the resources of the PUCCH 2/2a/2b occupied by the UE), CQI-PMI-Configindex (indicating the period and subframe of the CQI feedback), Rl-configindex (indicating the period and subframe of RI feedback, this is optional, it needs to depend on the configuration of the feedback period of CQI), and its CQI/PMI feedback period can be: 2 ⁇ 160ms (FDD), 1 ⁇ 160ms ( TDD).
  • Example 3 BSR (Periodic BSR Reporting): For periodic BSR reporting, the RRC layer is also required to configure related Per UE parameters, such as the periodic BSR reporting period.
  • the current periodic BSR reporting period ranges from 5 to 2560 ms.
  • Step 404 The method for determining the offline state of the MTC device by the base station side: It is required to set a counter N for determining whether the line is offline (the value of the specific N needs to consider the accuracy of the offline detection), and is used for counting that the periodic uplink is not continuously received. The number of signals (CQI feedback of SRS or PUCCH) to determine whether the current MTC device is offline. If the base station does not receive periodic uplink information for N consecutive times (the uplink information of the three periodic transmissions in step 403), the base station considers that the current MTC device is in an offline state.
  • the setting of the counter value N is related to the time requirement of the maximum MTC device offline detection and the period in step 403.
  • the sounding RS transmits a PerC ZC sequence, and the PUCCH 2/2a/2b transmission is spread by a Per UE ZC sequence, so it is necessary to pass
  • the signal strength after correlation or despreading determines whether there is a current channel, so it is necessary to set a detection threshold, which should be an implementation problem.
  • Step 405 If the MTC device is offline, the base station needs to indicate the offline MTC device to the core network. There are two methods for notifying the core network:
  • a notification method based on a single UE That is, the base station indicates that the offline status indication of each MTC device is transmitted to the core network through the S1 connection of the current MTC device.
  • Step 406 The core network notifies the MTC sever or the MTC User that the MTC device is offline. In addition, if there is a problem on the station side, the MTC device under the current base station is offline, then the base station side or other network entity (0&M) will give the core network a unified indication, indicating that all the MTC devices under the current base station are in the Offline status.
  • the network side enters the connection state by means of paging, and the base station side detects the time according to the maximum offline state (MAX —T— Detect ) is the period of the uplink signal reported by the MTC device during the period (as in step 403) and the counter N determining whether it is offline (as in step 404).
  • MAX —T— Detect the time according to the maximum offline state
  • an offline detection apparatus for an MTC device includes: a configuration unit 51, configured to periodically report the time information of the MTC device according to the obtained maximum offline state detection time information of the MTC device. Uplink information, and the configured uplink information that is periodically reported is sent to the MTC device, where the MTC device is in a connected state;
  • the determining unit 52 is configured to determine, according to the received status of the uplink signal periodically reported by the MTC device, whether the MTC device is in an offline state;
  • the notification unit 53 is configured to notify the core network that the MTC device is in an offline state and the MTC device is in an offline state.
  • the configuration unit 51 is configured to receive maximum offline state detection time information of the MTC device sent by the core network.
  • the configuration unit 51 is configured to receive, according to an S1 connection of the MTC device, maximum offline state detection time information of the MTC device sent by the core network.
  • the context message of the S1 connection includes an information field about a maximum offline detection time
  • the configuration unit 51 is configured to receive the MTC by using an information field about a maximum offline detection time in a context message of the S1 connection of the MTC device.
  • Maximum offline status detection time information of the device is not limited to “1 ms”
  • the uplink information that is periodically reported includes: the uplink signal type and the transmission mode information that are reported.
  • the reported uplink signal type includes one or more of a periodic sounding dedicated pilot signal, a periodic CQI feedback signal, and a periodic BSR reporting signal.
  • the reported uplink signal type includes a periodic sounding dedicated pilot signal
  • the transmission mode information includes: a reporting period and a subframe, an SRS duration, a ZC sequence that distinguishes a user, an SRS bandwidth, and whether one of frequency hopping information Kind or more.
  • the reported uplink signal type includes a periodic CQI feedback signal
  • the transmission mode information includes: a resource, a feedback period, and a subframe of the physical uplink control channel PUCCH occupied by the CQI feedback.
  • the transmission mode information further includes: a period and a subframe indicating the RI feedback.
  • the reported uplink signal type includes a periodic BSR reporting signal, and the transmission mode information includes: a reporting period.
  • the reporting period is based on the maximum offline state detection time information of the MTC device, and the set value of the uplink signal that is periodically reported by the MTC device is not continuously received during the maximum offline state detection time of the MTC device. Configuration.
  • the status of the uplink signal that is periodically reported by the received MTC device is: In the maximum offline state detection time of the MTC device, if the uplink signal periodically reported by the MTC device is not continuously received, the determining unit 52 is configured to During the maximum offline state detection time of the MTC device, if the number of uplink signals periodically reported by the MTC device is not exceeded, the MTC device is determined to be offline. Otherwise, it is determined that the MTC device is not in the offline state. Offline status.
  • the notification unit 53 may be configured to send information that the MTC device is offline to the core network, and send information that the MTC device is offline through the core network to the MTC server.
  • the notification unit 53 may send the identifier of the MTC device that is in the offline state to the core network in the set time period, for example, send the identifier of all the offline MTC devices to the core network, or directly The information that the MTC device is offline is sent to the core network separately.
  • the configuration unit 51 may be configured to obtain, from a source base station of the MTC device, maximum offline state detection time information of the MTC device when the MTC device is switched.
  • an MTC device for reporting an uplink signal includes: a connection control unit 61, configured to establish a connection with a network side according to a paging on a network side;
  • the receiving unit 62 is configured to receive, in the connected state, uplink information that is periodically reported by the base station;
  • the reporting unit 63 is configured to periodically send an uplink signal to the base station according to the periodically reported uplink information in the connected state.
  • the uplink information of the configuration periodically >3 ⁇ 4 is the same as that in the embodiment shown in FIG. 5, and details are not described herein again.
  • an offline detection control apparatus for an MTC device includes: a control unit 71, configured to: after receiving the maximum offline state detection time information of an MTC device sent by an MTC server, determine the MTC device. If the user is in urgent need of time, the MTC device is paged to establish a connection with the MTC device;
  • the first sending unit 72 is configured to send the maximum offline state detection time information of the MTC device to the base station, where the maximum offline state detection time information of the MTC device is used for offline detection, and the receiving unit 73 is configured to receive the base station.
  • the sent MTC device is in an offline state information; the second sending unit 74 is configured to notify the received information that the MTC device is offline.
  • the offline detection system of the embodiment of the present invention includes: a core network 81 and a base station 82, where
  • the core network 81 is configured to: after receiving the maximum offline state detection time information of the MTC device sent by the MTC server, determine that the MTC device belongs to a user whose time is urgent, and then page the MTC device to establish a connection with the MTC device; The maximum offline state detection time information of the MTC device is sent to the base station; and the MTC server is notified of the information that the MTC device obtained from the base station is offline.
  • the base station 82 is configured to: according to the obtained maximum offline state detection time information of the MTC device, configure the periodically reported uplink information for the MTC device, and send the configured periodically reported uplink information to the MTC device; according to the received
  • the status of the uplink signal periodically reported by the MTC device determines whether the MTC device is in an offline state. If the MTC device is in an offline state, the MTC server is notified by the core network that the MTC device is offline.
  • the base station configures the uplink information that is periodically reported by the MTC device according to the obtained maximum offline state detection time information of the MTC device, and sends the configured uplink information that is periodically reported to the MTC device;
  • the status of the uplink signal periodically reported by the MTC device determines whether the MTC device is in an offline state; if the MTC device is in an offline state, the base station notifies the MTC server of the information that the MTC device is offline through the core network, thereby realizing The MTC device in the connected state performs offline detection in time.
  • the embodiment of the invention optimizes the offline detection process for the MTC terminal, has less impact on the existing protocol, and ensures that the system effectively implements the offline detection and notification capability. It is especially suitable for offline state detection of an MTC device with strict requirements for off-line detection time, for example, offline state detection of an MTC device for a minute level.
  • offline state detection of an MTC device with strict requirements for off-line detection time, for example, offline state detection of an MTC device for a minute level.

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Abstract

La présente invention se rapporte à un procédé de détection hors ligne ainsi qu'à un appareil et à un système pour un dispositif de communication de type machine (MTC). Le procédé, l'appareil et le système selon l'invention sont utilisés pour exécuter une détection hors ligne pour le dispositif MTC qui se trouve dans un état connecté. Le procédé selon l'invention comprend les étapes suivantes : sur la base des informations de temps de détection maximum d'état hors ligne obtenues pour le dispositif MTC, une station de base configure périodiquement des informations sur la liaison montante rapportées pour le dispositif MTC, et transmet les informations sur la liaison montante rapportées qui sont périodiquement configurées au dispositif MTC qui se trouve dans un état connecté ; sur la base du statut des signaux sur la liaison montante reçus, périodiquement rapporté par le dispositif MTC, la station de base détermine si le dispositif MTC se trouve, ou non, dans un état hors ligne ; si le dispositif MTC se trouve dans l'état hors ligne, la station de base envoie à un serveur MTC des informations qui indiquent que le dispositif MTC se trouve dans l'état hors ligne, via un cœur de réseau.
PCT/CN2011/072375 2010-04-02 2011-04-01 Procédé de détection hors ligne, et appareil et système pour un dispositif de communication de type machine WO2011120444A1 (fr)

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CN103327611B (zh) * 2012-03-22 2016-08-10 华为技术有限公司 寻找mtc终端的方法、装置和系统
KR101904572B1 (ko) * 2013-09-27 2018-10-08 주식회사 케이티 단말을 위한 상향 링크 제어 채널 자원 설정 방법 및 장치
CN105981316B (zh) * 2014-02-13 2018-07-06 Lg电子株式会社 在支持机器型通信的无线接入系统中发送探测参考信号的方法和设备
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CN106535246B (zh) * 2015-09-11 2021-03-16 中兴通讯股份有限公司 一种缓冲区状态报告的上报方法、装置及系统
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