WO2013177992A1 - 一种节电模式下控制信令发送的方法和系统 - Google Patents

一种节电模式下控制信令发送的方法和系统 Download PDF

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Publication number
WO2013177992A1
WO2013177992A1 PCT/CN2013/074623 CN2013074623W WO2013177992A1 WO 2013177992 A1 WO2013177992 A1 WO 2013177992A1 CN 2013074623 W CN2013074623 W CN 2013074623W WO 2013177992 A1 WO2013177992 A1 WO 2013177992A1
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WO
WIPO (PCT)
Prior art keywords
management unit
mobility management
signaling
power saving
terminal
Prior art date
Application number
PCT/CN2013/074623
Other languages
English (en)
French (fr)
Inventor
吴昊
谢芳
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP13796719.6A priority Critical patent/EP2849506B1/en
Priority to US14/403,488 priority patent/US9426741B2/en
Publication of WO2013177992A1 publication Critical patent/WO2013177992A1/zh
Priority to US15/211,785 priority patent/US9609593B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/04—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration using triggered events
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/02—Arrangements for increasing efficiency of notification or paging channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/20—Transfer of user or subscriber data
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of machine type communication (MTC) technology, and in particular, to a method and system for controlling signaling transmission in a power saving mode.
  • MTC machine type communication
  • the existing cellular wireless communication system is shown in FIG. 1 and is mainly composed of a core network (CN, Core Network), an access network (RAN, Radio Access Network), and a terminal.
  • the core network is responsible for non-access layer transactions, such as terminal location updates, etc.
  • the core network is the anchor point of the user plane.
  • the access network includes a base station, or includes a base station and a base station controller, and the access network is responsible for access layer transactions, such as management of radio resources; the base stations may have physical or logical connections according to actual conditions, such as the base station in FIG. 1 and base station 2, or a connection between base station 1 and base station 3, and each base station can be connected to one or more core network nodes.
  • a user equipment (UE, User Equipment) refers to various devices that can communicate with a cellular wireless communication network, such as a mobile phone or a notebook computer.
  • the mobility management unit In the Long Term Evolution (LTE) network, the mobility management unit refers to the Mobility Management Entity (MME). In the third generation mobile communication (3G) network, it refers to the Serving GPRS Support Node (SGSN, Serving GPRS Support Node); MME or SGSN is the unit responsible for managing terminal access control, location information update and handover in the core network, responsible for core network-to-terminal non-access stratum signaling control, and has the function of registering the terminal to the network. .
  • MME Mobility Management Entity
  • 3G Third generation mobile communication
  • the Home Subscriber Server (HSS) or the Home Location Register (HLR) is an entity in the core network that is responsible for storing subscription data, identity information, authentication information, and authorization information of the terminal device.
  • HSS or HLR It can be used to save the user's identity information and the binding information of the user and the terminal device, or only save the user's identity information (the gateway can save the binding information of the user and the terminal device), or directly save the identity information of the terminal device.
  • the HSS or HLR is also responsible for the user's subscription database, as well as the user's authentication and authorization.
  • the service platform can query user or terminal information from the HSS or HLR.
  • the terminal In the ISR mode, the terminal is simultaneously registered in the MME and the SGSN, so that when the terminal moves between the LTE network and the 3G network (ie, moving between the MME and the SGSN), it is not necessary to perform TAU or RAIL when there is data to reach the Serving Gateway (SGW).
  • SGW Serving Gateway
  • the serving gateway needs to send a downlink data notification message to both the MME and the SGSN, so that both the MME and the SGSN need to send a paging message to the terminal.
  • some mobile terminals do not need to communicate with the network from time to time, for example, a location reporting terminal on a courier vehicle, only to reach a certain designated location or report the location of the current vehicle according to a specified period, so that the terminal can be used for such a terminal.
  • the sleep time is set in this mode. During the sleep time, the terminal does not receive any paging message and does not communicate with the network. The data is only sent and received during the activation time.
  • the terminal enters the power-saving mode the paging message cannot be received, and the network sends a page when the downlink data arrives. At this time, not only the terminal cannot receive the paging message, but also causes the network to repeatedly page. The necessary resources are wasted. Summary of the invention
  • the main purpose of the embodiments of the present invention is to provide a method and a system for controlling signaling transmission in a power saving mode, so as to solve the problem in the prior art that when the terminal enters the power saving mode, the terminal has no When the method receives the paging message of the network, it also causes the network to repeatedly page and cause waste of resources.
  • the technical solution of the embodiment of the present invention is implemented as follows:
  • the embodiment of the invention provides a method for controlling signaling transmission in a power saving mode, and the method includes:
  • the terminal sends the tracking area update request signaling or the routing area update request signaling to the new mobility management unit, where the signaling includes a power saving parameter;
  • the new mobility management unit sends the power saving parameters to the old mobility management unit or the service gateway.
  • the new mobility management unit sends the power saving parameter to the old mobility management unit, including:
  • the new mobility management unit sends context request signaling to the old mobility management unit; the old mobility management unit sends context response signaling to the new mobility management unit, and the context response signaling includes an idle mode The signaling reduction mode ISR support indication; the new mobility management unit sends a context confirmation signaling to the old mobility management unit, where the context confirmation signaling includes an ISR activation indication and a power saving parameter.
  • the method further includes:
  • the new mobility management unit and the old mobility management unit determine based on the power saving parameters of the terminal:
  • the new mobility management unit and the old mobility management unit send a paging message to the terminal;
  • the new mobility management unit and the old mobility management unit send feedback signaling to the serving gateway, where the feedback signaling includes a delay indication.
  • the new mobility management unit sends the power saving parameter to the service gateway, including:
  • the new mobility management unit sends an update bearer request signaling to the serving gateway, where the update bearer request signaling includes the power saving parameter.
  • the method further includes: the serving gateway sending, according to the power saving parameter control signaling:
  • the serving gateway When there is data to be sent to the terminal, if it is currently in the activation time of the terminal, the serving gateway sends downlink data notification signaling to the new mobility management unit; if it is currently in the inactive time of the terminal, the serving gateway caches the data of the terminal, and waits until the terminal The activation time, sending downlink data notification signaling to the new mobility management unit.
  • the power saving parameter includes an activation time and a power saving mode period; or includes an activation time and a sleep time.
  • the embodiment of the present invention further provides a system for controlling signaling transmission in a power saving mode, the system comprising: a terminal, a new mobility management unit, an old mobility management unit, and a service gateway, where the terminal is configured to send Tracking area update request signaling or routing area update request signaling to a new mobility management unit, where the signaling includes a power saving parameter;
  • the new mobility management unit is configured to send the power saving parameter to the old mobility management unit or the service gateway;
  • the old mobility management unit and the serving gateway save the received power saving parameters.
  • the new mobility management unit is further configured to send context request signaling to the old mobility management unit;
  • the old mobility management unit is further configured to send a context response signaling to the new mobility management unit, where the context response signaling includes an idle mode signaling reduction mode ISR support indication;
  • the new mobility management unit is further configured to send context confirmation signaling to the old mobility management unit, where the context confirmation signaling includes an ISR activation indication and a power saving parameter.
  • the new mobility management unit sends the power saving parameter to the old mobility management list. After the yuan,
  • the new and old mobility management unit is further configured to: when the serving gateway sends the notification signaling to the new mobility management unit and the old mobility management unit, determine according to the power saving parameter of the terminal: The activation time of the terminal, the new mobility management unit and the old mobility management unit send a paging message to the terminal;
  • the new mobility management unit and the old mobility management unit send feedback signaling to the serving gateway, where the feedback signaling includes a delay indication.
  • the new mobility management unit is further configured to: send update bearer request signaling to the service gateway, where the update bearer request signaling includes the power saving parameter.
  • the serving gateway is further configured to: according to the power saving parameter control signaling:
  • the serving gateway When there is data to be sent to the terminal, if it is currently in the activation time of the terminal, the serving gateway sends downlink data notification signaling to the new mobility management unit; if it is currently in the inactive time of the terminal, the serving gateway caches the data of the terminal, and waits until the terminal The activation time, sending downlink data notification signaling to the new mobility management unit.
  • the power saving parameter includes an activation time and a power saving mode period; or includes an activation time and a sleep time.
  • a method and system for controlling signaling transmission in a power saving mode provided by an embodiment of the present invention is applied to when a terminal moves across a network between a 3G network and an LTE network, and the terminal is saved by the new and old mobility management unit.
  • the power saving parameter controls the timing of sending the paging message to the terminal according to the power saving parameter.
  • the SGW saves the power saving parameter of the terminal, and controls the timing of sending the downlink data notification signaling to the new MME according to the power saving parameter.
  • the network can be consistent with the power saving mode of the terminal, and the paging message is sent at the activation time to ensure that the terminal can receive the paging message, and the network is avoided. Waste of resources caused by repeated paging.
  • FIG. 1 is a schematic structural diagram of a cellular wireless communication system in the prior art
  • FIG. 1 is a flowchart of a method for transmitting control signaling in a power saving mode according to Embodiment 1 of the present invention
  • FIG. 3 is a flowchart of a method for transmitting control signaling in a power saving mode according to Embodiment 2 of the present invention
  • FIG. 5 is a flowchart of a method for transmitting control signaling in a power saving mode according to an embodiment of the present invention
  • FIG. 6 is a flowchart of a method for transmitting control signaling in a power saving mode according to an embodiment of the present invention
  • Embodiments of the present invention provide a method and system for controlling signaling transmission in a power saving mode, which will be described in detail below in conjunction with specific embodiments.
  • the method for controlling signaling transmission in the power saving mode in the first embodiment of the present invention is applicable to the mobile network moving between the 3G network and the LTE network.
  • the process of the method is as shown in FIG. 2, and the following steps are mainly included:
  • Step 201 When the terminal currently camped on the 3G network moves to the LTE network, the serving node of the terminal is changed by the SGSN (that is, the old mobility management unit) to the MME (that is, the new mobility management unit).
  • the terminal sends the TAU request signaling to the MME, where the signaling includes the identifier of the terminal, such as an International Mobile Subscriber Identification Number (IMSI) or a Globally Unique Temporary ID (GUTI) of the terminal.
  • the power saving parameters include: activation time, sleep time; or
  • the power saving parameters include: activation time, power saving mode period.
  • the activation time indicates the time when the terminal can receive data and signaling
  • the sleep time indicates the time when the terminal cannot receive data and signaling
  • the node mode period indicates the duration of the terminal between the two activation times.
  • the activation time and the sleep time are all time periods.
  • the form of the power saving parameter is not limited to the above, and the power saving parameter may include only the activation time, and may only include the sleep time and the power saving mode period (the power saving mode period is subtracted).
  • the activation time can be obtained by the sleep time.
  • Any form of power saving parameter that can indicate that the terminal can receive data and signaling time in the actual application should belong to the protection scope of the embodiment of the present invention.
  • Step 202 The MME sends a context request signal to the corresponding SGSN according to the SGSN address in the TAU request, where the signaling includes the identifier of the terminal.
  • Step 203 The SGSN queries, according to the terminal identifier in the context request signaling, the context information of the corresponding terminal, where the context information includes a bearer identifier of the terminal, a security authentication parameter, a service gateway (SGW) name, a service gateway address, and an ISR support indication.
  • the SGSN sends the context information of the terminal to the MME in the context response signaling.
  • the setting method of the ISR support indication is:
  • Idle mode Signaling Reduction Supported Indication If the value is set to 1, it means that the SGSN and the serving gateway have ISR capability. If the value is set to 0, it means that the SGSN or the serving gateway does not have ISR capability.
  • Step 204 After receiving the context information, the MME sends the context confirmation signaling to the SGSN. If the context information contains an ISR support indication, and if "Idle mode Signaling Reduction Supported Indication" is set to 1, the MME activates the ISR mode, in the context confirmation letter.
  • the command includes an ISR activation indication and a power saving parameter; wherein the ISR activation indication is set to 1, indicating that the MME has activated the ISR mode.
  • the ISR activation indication in the MME's context confirmation signaling is set to 0, indicating that the MME does not activate the ISR mode, and the context confirmation signaling is Does not include power saving parameters.
  • the SGSN continues to retain the context information of the terminal and saves the power saving parameters sent by the MME. And if the ISR activation indication in the context acknowledgment signaling from the MME is set to 1, the SGSN itself also activates the ISR mode.
  • the MME and the SGSN locally set and start the node mode timer according to the power saving parameter: if the power saving parameter includes the activation time and the sleep time, an activation timer is started, and the value is set to the activation time in the power saving parameter; After the timeout, the sleep timer is started, and the value is set to the sleep time in the power saving parameter; after the sleep timer expires, the activation timer is started again;
  • the power saving parameter includes an activation time and a power saving mode period
  • an activation timer is started, the value of which is set to the activation time in the power saving parameter, and a node mode period timer is started, and the value is set to be in the power saving parameter.
  • the power save mode cycle, and the power save mode cycle timer is a cycle start; after each cycle of the power save mode cycle timer expires, the activation timer is started again.
  • Step 205 The MME sends an update bearer request signaling to the corresponding SGW according to the SGW address in the context information.
  • Step 206 After receiving the update request signaling sent by the MME, the SGW includes the address of the MME in the local bearer context information, and sends the update bearer response signaling to the MME.
  • Step 207 When the data is sent to the terminal, the SGW sends the downlink data notification signaling to the MME and the SGSN, where the downlink data notification signaling includes the identifier of the terminal.
  • the terminal After the ISR mode is activated, the terminal does not need to move between the MME and the SGSN.
  • the line location update request therefore, the SGW cannot determine whether the terminal is currently in the MME or the service range of the SGSN, and thus needs to send downlink data notification signaling to both the MME and the SGSN.
  • Steps 208 to 209 the MME and the SGSN search for the power saving parameters of the locally saved terminal according to the terminal identifier in the downlink data notification signaling, and perform the following judgments:
  • the MME and the SGSN send a downlink data notification acknowledgement signaling to the SGW, where the signaling indicates that the paging message will be sent immediately; the MME and the SGSN send the paging message to the terminal. ;
  • the MME and the SGSN send downlink data notification acknowledgement signaling to the SGW, where the signaling includes the identifier of the terminal and the delay indication.
  • the time from the current time to the activation time of the next cycle is:
  • the duration may be set to the remaining time of the power save mode cycle timer
  • the duration can be set to the remaining time of the sleep timer.
  • the SGW After receiving the downlink data notification acknowledgement signaling, the SGW does not send the downlink data notification signaling and buffers the data of the terminal according to the value of the delay indication in the signaling.
  • the MME and the SGSN do not immediately send a paging message to the terminal, but send a paging message to the terminal when the activation time of the terminal comes.
  • both the MME and the SGSN save the context information of the terminal, the two network elements consider the terminal to be in its own network, and therefore both networks attempt to send a paging message.
  • a network element receives a response from the terminal to the page (sends a service request), it goes to the SGW. Reporting, the SGW notifies another network element to stop paging.
  • the terminal After receiving the paging message, the terminal sends a service request to the MME or the SGSN that sends the paging message;
  • the MME or the SGSN that receives the service request sends the context establishment request signaling to the base station, and includes the SGW address in the request signaling.
  • the base station After receiving the signaling, the base station establishes a radio bearer for the terminal, and after completion, the MME or the SGSN is completed.
  • the MME or the SGSN sends the address of the base station to the SGW; the SGW sends the downlink data to the base station, and the SGW sends the downlink data to the terminal.
  • the method for controlling signaling transmission in the power saving mode of the second embodiment of the present invention is applicable to the mobile network moving between the 3G network and the LTE network.
  • the process is as shown in FIG. 3, which mainly includes the following steps: Step 301, Current camping
  • the terminal under the LTE network moves to the 3G network, and the serving node of the terminal is changed by the MME (ie, the old mobility management unit) to the SGSN (ie, the new mobility management unit).
  • the terminal sends the RAU signaling to the SGSN, where the signaling includes the identifier of the terminal (IMSI or GUTI), the identifier of the MME, and the power saving parameter.
  • the form of the power saving parameter can be:
  • the power saving parameters include: activation time, sleep time; or
  • the power saving parameters include: activation time, power saving mode period.
  • the activation time indicates the time when the terminal can receive data and signaling
  • the sleep time indicates the time when the terminal cannot receive data and signaling
  • the node mode period indicates the duration of the terminal between the two activation times.
  • the activation time and the sleep time are all time periods.
  • the form of the power saving parameter is not limited to the above, and the power saving parameter may include only the activation time, and may only include the sleep time and the power saving mode period (the power saving mode period is subtracted).
  • the activation time can be obtained by the sleep time.
  • Any form of power saving parameter that can indicate that the terminal can receive data and signaling time in the actual application should belong to the protection scope of the embodiment of the present invention.
  • Step 302 The SGSN sends a context request signaling to the MME according to the MME address in the RAU request signaling, where the signaling includes the identifier of the terminal.
  • Step 303 The MME queries the context information of the terminal according to the terminal identifier in the context request signaling, where the context information includes a bearer identifier of the terminal, a security authentication parameter, a service gateway name, a service gateway address, and an ISR support indication.
  • the MME sends the context information of the terminal to the SGSN in the context response signaling.
  • the ISR support indication setting mode is:
  • the value is set to 1, it indicates that the MME and the serving gateway have ISR capability. If the value is set to 0, it indicates that the MME or the serving gateway does not have ISR capability.
  • Step 304 After receiving the context information, the SGSN sends a context confirmation signaling to the MME. If the context information includes an ISR support indication, and if "Idle mode Signaling Reduction Supported Indication" is set to 1, the SGSN activates the ISR mode, and the ISR activation indication and the power saving parameter are included in the context confirmation signaling; wherein, the ISR activation indication setting A value of 1 indicates that the SGSN has activated the ISR mode.
  • ISR activation indication in the Context Confirmation Signaling of the SGSN is set to 0, indicating that the SGSN does not activate the ISR mode, and the context confirmation letter
  • the power saving parameters are not included in the order.
  • the MME continues to retain the context information of the terminal and saves the power saving parameters sent by the SGSN. And if the ISR activation indication in the context acknowledgment signaling from the SGSN is set to 1, the MME itself also activates the ISR mode.
  • the MME and the SGSN locally set and start the node mode timer according to the power saving parameter: if the power saving parameter includes the activation time and the sleep time, an activation timer is started, and the value is set to the activation time in the power saving parameter; Start the sleep timer after the time, its The value is set to the sleep time in the power saving parameter; after the sleep timer expires, the activation timer will start again;
  • the power saving parameter includes an activation time and a power saving mode period
  • an activation timer is started, the value of which is set to the activation time in the power saving parameter, and a node mode period timer is started, and the value is set to be in the power saving parameter.
  • the power save mode cycle, and the power save mode cycle timer is a cycle start; after each cycle of the power save mode cycle timer expires, the activation timer is started again.
  • Step 305 The SGSN sends an update bearer request signaling to the corresponding SGW according to the SGW address in the context information.
  • Step 306 After receiving the update bearer request sent by the SGSN, the SGW includes the address of the SGSN in the local bearer context information, and sends the update bearer response signaling to the SGSN.
  • Step 307 When the data is sent to the terminal, the SGW sends the downlink data notification signaling to the MME and the SGSN, where the downlink data notification signaling includes the identifier of the terminal.
  • the terminal After the ISR mode is activated, the terminal does not need to perform a location update request to move between the MME and the SGSN. Therefore, the SGW cannot determine whether the terminal is currently in the MME or the service range of the SGSN, and therefore needs to send a downlink data notification message to both the MME and the SGSN. make.
  • the MME and the SGSN send a downlink data notification acknowledgement signaling to the SGW, where the signaling indicates that the paging message will be sent immediately; the MME and the SGSN send the paging message to the terminal. ;
  • the MME and the SGSN send downlink data notification acknowledgement signaling to the SGW, where the signaling includes the identifier of the terminal and the delay indication.
  • the manner of obtaining the duration of the activation time from the current time to the next cycle is: If the MME or the SGSN runs a power save mode cycle timer, the duration may be set to the remaining time of the power save mode cycle timer;
  • the duration can be set to the remaining time of the sleep timer.
  • the SGW After receiving the downlink data notification acknowledgement signaling, the SGW does not send the downlink data notification signaling within the time according to the value of the delay indication in the signaling, and caches the data of the terminal.
  • the MME and the SGSN do not immediately send a paging message to the terminal, but when the activation time of the terminal comes, a paging message is sent to the terminal.
  • both the MME and the SGSN save the context information of the terminal, the two network elements will consider the terminal to be in its own network, so both networks will try to send a paging message.
  • a network element receives the terminal's response to the paging (sending a service request), it reports to the SGW that the SGW then notifies another network element to stop paging.
  • the terminal After receiving the paging message, the terminal sends a service request to the MME or the SGSN that sends the paging message;
  • the MME or the SGSN that receives the service request sends the context establishment request signaling to the base station, and includes the SGW address in the request signaling.
  • the base station After receiving the signaling, the base station establishes a radio bearer for the terminal, and after completion, the MME or the SGSN is completed.
  • the MME or the SGSN sends the address of the base station to the SGW; the SGW sends the downlink data to the base station, and the SGW sends the downlink data to the terminal.
  • the method for controlling signaling transmission in the power saving mode in the third embodiment of the present invention is applicable to the mobile terminal moving across the tracking area in the LTE network.
  • the process of the method is as shown in FIG. 4, and the method mainly includes the following steps: Step 401: Tracking area It is a range area that the network uses to manage the location of the terminal. After the terminal registers with the network, it will be assigned to a tracking area. During the terminal movement, it may move to a new tracking area. When the terminal moves to the new tracking area, the terminal sends TAU request signaling to the MME of the new tracking area, where the signaling includes power saving parameters.
  • the form of the power saving parameter can be:
  • the power saving parameters include: activation time, sleep time; or
  • the power saving parameters include: activation time, power saving mode period.
  • the activation time indicates the time when the terminal can receive data and signaling
  • the sleep time indicates the time when the terminal cannot receive data and signaling
  • the node mode period indicates the duration of the terminal between the two activation times.
  • the activation time and the sleep time are all time periods.
  • the form of the power saving parameter is not limited to the above, and the power saving parameter may include only the activation time, and may only include the sleep time and the power saving mode period (the power saving mode period is subtracted).
  • the activation time can be obtained by the sleep time.
  • Any form of power saving parameter that can indicate that the terminal can receive data and signaling time in the actual application should belong to the protection scope of the embodiment of the present invention.
  • Step 402 the new MME according to the old MME TAU request address, sending a context request to the old MME signaling, the signaling includes the identifier (IMSI or GUTI) 0 terminal
  • Step 403 The old MME queries the terminal information of the terminal according to the terminal identifier sent by the new MME, where the context information includes the bearer identifier, the security authentication parameter, the service gateway name, and the service gateway address of the terminal; the old MME includes the context information of the terminal in the context.
  • the response signal is sent to the new MME.
  • Step 404 After receiving the context information, the new MME sends the context confirmation signaling to the old MME.
  • Step 405 The new MME sends an update bearer request signaling to the corresponding SGW according to the SGW address in the context information, where the signaling includes a power saving parameter.
  • Step 406 The SGW saves the received power saving parameter, saves the identifier or address of the new MME, and sends the updated bearer response signaling to the new MME.
  • Step 407 The SGW locally sets and starts the node mode timer according to the power saving parameter: if the power saving parameter includes an activation time and a sleep time, an activation timer is started, and the value is set to an activation time in the power saving parameter; After the timer expires, the sleep timer is started, and the value is set to the sleep time in the power saving parameter; after the sleep timer expires, the activation timer is started again;
  • the power saving parameter includes an activation time and a power saving mode period
  • an activation timer is started, the value of which is set to the activation time in the power saving parameter, and a node mode period timer is started, and the value is set to be in the power saving parameter.
  • the power save mode cycle, and the power save mode cycle timer is a cycle start; after each cycle of the power save mode cycle timer expires, the activation timer is started again.
  • Steps 408 ⁇ 409 when data is sent to the terminal, the SGW performs the following judgment according to each power saving mode timer:
  • the SGW sends the downlink data notification signaling to the new MME;
  • the SGW buffers the data of the terminal, and when the activation timer is started, sends the downlink data notification signaling to the new MME.
  • the new MME After receiving the downlink data notification signaling sent by the SGW, the new MME sends a downlink data notification acknowledgment signaling to the SGW, confirming that the signaling has been received, and indicating that the paging message will be sent immediately in the signaling; The message is to the terminal.
  • the terminal After receiving the paging message, the terminal sends a service request to the new MME.
  • the new MME sends a context setup request to the base station, and includes an SGW address in the request signaling.
  • the base station After receiving the signaling, the base station establishes a radio bearer for the terminal, and after the completion, sends a context setup complete signaling to the MME; The address is sent to the SGW; the SGW sends the downlink data to the base station, and the base station sends the data to the terminal.
  • the method for controlling signaling transmission in a power saving mode is As shown in Figure 5, it mainly includes:
  • Step 501 The terminal sends the tracking area update request signaling or the routing area update request signaling to the new mobility management unit, where the signaling includes a power saving parameter.
  • Step 502 The new mobility management unit sends the power saving parameter to the old mobility management unit or the service gateway.
  • the new mobility management unit sends the power saving parameter to the old mobility management unit, including:
  • the new mobility management unit sends the context request signaling to the old mobility management unit; the old mobility management unit sends the context response signaling to the new mobility management unit, where the context response signaling includes an ISR support indication;
  • the new mobility management unit sends context acknowledgment signaling to the old mobility management unit, and the context acknowledgment signaling includes an ISR activation indication and a power saving parameter.
  • the method further includes:
  • the new mobility management unit and the old mobility management unit determine according to the power saving parameter of the terminal: if the activation time of the terminal is currently new, The mobility management unit and the old mobility management unit send a paging message to the terminal;
  • the new mobility management unit and the old mobility management unit send feedback signaling to the serving gateway, and the feedback signaling includes a delay indication.
  • the new mobility management unit sends the power saving parameter to the serving gateway, including: the new mobility management unit sends the update bearer request signaling to the serving gateway, and the update bearer request signaling includes a power saving parameter.
  • the method further includes: the serving gateway sends the signaling according to the power saving parameter: When there is data to be sent to the terminal, if it is currently in the activation time of the terminal, the serving gateway sends downlink data notification signaling to the new mobility management unit; if it is currently in the inactive time of the terminal, the serving gateway caches the data of the terminal, and waits until the terminal The activation time, sending downlink data notification signaling to the new mobility management unit.
  • the system includes: a terminal 10, a new mobility management unit 20, and an old mobility management.
  • Unit 30 and service gateway 40 wherein
  • the terminal 10 is configured to send the tracking area update request signaling or the routing area update request signaling to the new mobility management unit 20, where the signaling includes a power saving parameter;
  • a new mobility management unit 20 configured to send the power saving parameter to the old mobility management unit 30 or the service gateway 40;
  • the old mobility management unit 30 and the service gateway 40 save the received power saving parameters.
  • the new mobility management unit 20 is further configured to send context request signaling to the old mobility management unit 30;
  • the old mobility management unit 30 is further configured to send the context response signaling to the new mobility management unit 20, where the context response signaling includes an idle mode signaling reduction mode ISR support indication;
  • the new mobility management unit 20 is further configured to send context confirmation signaling to the old mobility management unit 30, where the context confirmation signaling includes an ISR activation indication and a power saving parameter.
  • the new mobility management unit 20 sends the power saving parameter to the old mobility management unit 30,
  • the new and old mobility management unit is further configured to: when the serving gateway 40 sends the notification signaling to the new mobility management unit 20 and the old mobility management unit 30, determine according to the power saving parameter of the terminal:
  • the new mobility management unit 20 and the old The mobility management unit 30 sends a paging message to the terminal 10;
  • the new mobility management unit 20 and the old mobility management unit 30 send feedback signaling to the serving gateway 40, and the feedback signaling includes a delay indication.
  • the new mobility management unit 20 is further configured to send the update bearer request signaling to the serving gateway 40, where the update bearer request signaling includes the power saving parameter.
  • the serving gateway 40 is further configured to: according to the power saving parameter control signaling:
  • the serving gateway 40 When there is data to be sent to the terminal, if it is currently in the activation time of the terminal, the serving gateway 40 sends downlink data notification signaling to the new mobility management unit 20; if it is currently in the inactive time of the terminal, the serving gateway 40 buffers the data of the terminal. Waiting for the activation time of the terminal, the downlink data notification signaling is sent to the new mobility management unit 20.

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Abstract

本发明公开了一种节电模式下控制信令发送的方法和系统，方法包括：终端发送跟踪区更新请求信令或路由区更新请求信令给新移动性管理单元，所述信令中包括节电参数；新移动性管理单元将节电参数发送给旧移动性管理单元或服务网关。通过本发明，使得网络能够与终端的节电模式保持一致，在激活时间才发送寻呼消息，以确保终端能收到寻呼消息，也避免了由于网络反复寻呼导致的资源浪费。

Description

一种节电模式下控制信令发送的方法和系统 技术领域
本发明涉及机器类型通信（MTC, Machine Type Communication )技术 领域， 尤其涉及一种节电模式下控制信令发送的方法和系统。 背景技术
现有的蜂窝无线通讯系统如图 1 所示， 主要由核心网 （CN , Core Network ), 接入网 （RAN, Radio Access Network )和终端组成。 核心网负 责非接入层事务， 例如终端位置更新等， 核心网是用户面的锚点。 接入网 包括基站， 或者包括基站以及基站控制器， 接入网负责接入层事务， 例如 无线资源的管理； 基站之间可以根据实际情况存在物理或者逻辑上的连接， 如图 1中的基站 1和基站 2、或者基站 1和基站 3之间的连接， 并且每个基 站可以与一个或者一个以上的核心网节点连接。终端即用户设备（UE, User Equipment )是指可以和蜂窝无线通讯网络通讯的各种设备， 比如移动电话 或者笔记本电脑等。
移动性管理单元在长期演进（ LTE, Long Term Evolution ) 网络中是指 移动性管理实体（ MME, Mobility Management Entity ), 在第三代移动通信 ( 3G ) 网络中是指服务 GPRS 支持节点 （SGSN, Serving GPRS Support Node ); MME或 SGSN是核心网中负责管理终端接入控制、 位置信息更新 以及切换的单元， 负责核心网到终端的非接入层信令控制， 具备将终端注 册到网络的功能。
归属用户服务器（HSS, Home Subscriber Server )或归属用户位置寄存 器（ HLR, Home Location Register )是核心网中负责保存终端设备的签约数 据、身份信息、认证信息和授权信息等的实体。根据不同情况， HSS或 HLR 可用于保存用户的身份信息以及用户和终端设备的绑定信息， 或只保存用 户的身份信息（可由网关保存用户和终端设备的绑定信息）， 或直接保存终 端设备的身份信息。 HSS或 HLR还负责用户的签约数据库， 以及执行用户 的身份验证和授权等。 业务平台可从 HSS或 HLR查询用户或终端信息。
在 LTE部署前期， 不可能替换所有原有的 3G网络， 由此可能导致终 端反复在 LTE网络和 3G网络移动， 进而导致反复执行跟踪区更新 ( TAU, Tracking Area Update )或路由区更新 ( RAU, Routing Area Update )过程； 终端移动到 LTE网络时执行 TAU过程， 终端移动到 3G网络时执行 RAU 过程。 这样会造成较大的信令消耗， 因此 LTE终端需要通过减少空闲状态 信令（ ISR, Idle state Signaling Reduction )模式来避免大量的空闲状态下与 网络的信令交互。 在 ISR模式下， 终端同时注册在 MME和 SGSN, 这样终 端在 LTE网络和 3G网络之间移动时 （即在 MME和 SGSN之间移动 )不 需要执行 TAU或 RAIL 当有数据到达服务网关 （SGW ) 时， 服务网关需 要向 MME和 SGSN都发送下行数据通知消息，从而 MME和 SGSN都需要 向终端发送寻呼消息。
实际应用中， 部分移动终端并不需要时时与网络通信， 例如快递车辆 上的位置报告终端， 只是在到达某个指定地点或者根据指定的周期报告当 前车辆的位置， 因此对这类终端可以使用节电模式， 在该模式下设定休眠 时间， 在休眠时间内终端不接收任何寻呼消息， 也不与网络进行通信， 只 有在激活时间才收发数据。 当终端进入节电模式时， 不能接收寻呼消息， 而网络在下行数据到达时就会发送寻呼， 此时不仅终端无法收到该寻呼消 息， 还会造成网络反复寻呼而导致的不必要的资源浪费。 发明内容
有鉴于此， 本发明实施例的主要目的在于提供一种节电模式下控制信 令发送的方法和系统， 以解决现有技术中在终端进入节电模式下， 终端无 法收到网络的寻呼消息， 还会造成网络反复寻呼而导致资源浪费的问题。 为达到上述目的， 本发明实施例的技术方案是这样实现的：
本发明实施例提供了一种节电模式下控制信令发送的方法， 该方法包 括：
终端发送跟踪区更新请求信令或路由区更新请求信令给新移动性管理 单元， 所述信令中包括节电参数；
所述新移动性管理单元将节电参数发送给旧移动性管理单元或服务网 关。
较佳的， 所述新移动性管理单元将节电参数发送给旧移动性管理单元， 包括：
所述新移动性管理单元发送上下文请求信令给旧移动性管理单元； 所述旧移动性管理单元发送上下文响应信令给所述新移动性管理单 元， 所述上下文响应信令中包含空闲模式信令减少模式 ISR支持指示； 所述新移动性管理单元发送上下文确认信令给所述旧移动性管理单 元， 所述上下文确认信令中包含 ISR激活指示和节电参数。
较佳的， 在所述新移动性管理单元将节电参数发送给旧移动性管理单 元之后， 该方法还包括：
当服务网关发送通知信令给所述新移动性管理单元和旧移动性管理单 元时， 所述新移动性管理单元和旧移动性管理单元根据所述终端的节电参 数判断：
如果当前处于所述终端的激活时间， 则所述新移动性管理单元和旧移 动性管理单元发送寻呼消息给所述终端；
如果当前处于所述终端的非激活时间， 则所述新移动性管理单元和旧 移动性管理单元发送反馈信令给服务网关， 所述反馈信令中包括延迟指示。
较佳的， 所述新移动性管理单元将节电参数发送给服务网关， 包括： 所述新移动性管理单元发送更新承载请求信令给服务网关， 所述更新 承载请求信令中包括所述节电参数。
较佳的， 在所述新移动性管理单元将节电参数发送给服务网关之后， 该方法还包括： 所述服务网关根据节电参数控制信令发送：
当有数据需要发送给终端时， 如果当前处于终端的激活时间， 服务网 关发送下行数据通知信令给新移动性管理单元； 如果当前处于终端的非激 活时间， 服务网关緩存终端的数据， 等到终端的激活时间， 发送下行数据 通知信令给新移动性管理单元。
较佳的， 所述节电参数包括激活时间和节电模式周期； 或包括激活时 间和睡眠时间。
本发明实施例还提供了一种节电模式下控制信令发送的系统， 该系统 包括： 终端、 新移动性管理单元、 旧移动性管理单元和服务网关， 其中， 所述终端， 用于发送跟踪区更新请求信令或路由区更新请求信令给新 移动性管理单元， 所述信令中包括节电参数；
所述新移动性管理单元， 用于将节电参数发送给旧移动性管理单元或 服务网关；
所述旧移动性管理单元和服务网关对接收的节电参数进行保存。
较佳的， 所述新移动性管理单元还用于， 发送上下文请求信令给旧移 动性管理单元；
所述旧移动性管理单元还用于， 发送上下文响应信令给所述新移动性 管理单元， 所述上下文响应信令中包含空闲模式信令减少模式 ISR支持指 示；
所述新移动性管理单元还用于， 发送上下文确认信令给所述旧移动性 管理单元， 所述上下文确认信令中包含 ISR激活指示和节电参数。
较佳的， 在所述新移动性管理单元将节电参数发送给旧移动性管理单 元之后，
所述新、 旧移动性管理单元还用于， 当服务网关发送通知信令给所述 新移动性管理单元和旧移动性管理单元时， 根据所述终端的节电参数判断： 如果当前处于所述终端的激活时间， 则所述新移动性管理单元和旧移 动性管理单元发送寻呼消息给所述终端；
如果当前处于所述终端的非激活时间， 则所述新移动性管理单元和旧 移动性管理单元发送反馈信令给服务网关， 所述反馈信令中包括延迟指示。
较佳的， 所述新移动性管理单元还用于， 发送更新承载请求信令给服 务网关， 所述更新承载请求信令中包括所述节电参数。
较佳的， 在所述新移动性管理单元将节电参数发送给服务网关之后， 所述服务网关还用于， 根据节电参数控制信令发送：
当有数据需要发送给终端时， 如果当前处于终端的激活时间， 服务网 关发送下行数据通知信令给新移动性管理单元； 如果当前处于终端的非激 活时间， 服务网关緩存终端的数据， 等到终端的激活时间， 发送下行数据 通知信令给新移动性管理单元。
较佳的， 所述节电参数包括激活时间和节电模式周期； 或包括激活时 间和睡眠时间。
本发明实施例所提供的一种节电模式下控制信令发送的方法和系统， 应用于终端在 3G网络和 LTE网络之间的跨网络移动时， 由新、 旧移动性 管理单元保存终端的节电参数， 并根据该节电参数控制向终端发送寻呼消 息的时机。 应用于终端在 LTE网络内部的跨跟踪区移动时， 由 SGW保存 终端的节电参数，并根据该节电参数控制向新 MME发送下行数据通知信令 的时机。
通过本发明实施例， 使得网络能够与终端的节电模式保持一致， 在激 活时间才发送寻呼消息， 以确保终端能收到寻呼消息， 也避免了由于网络 反复寻呼导致的资源浪费。 附图说明
图 1为现有技术中蜂窝无线通讯系统的结构示意图；
图 1为本发明实施例一的节电模式下控制信令发送的方法流程图； 图 3为本发明实施例二的节电模式下控制信令发送的方法流程图； 图 4为本发明实施例三的节电模式下控制信令发送的方法流程图； 图 5为本发明实施例的一种节电模式下控制信令发送的方法流程图； 图 6为本发明实施例的一种节电模式下控制信令发送的系统结构示意 图。 具体实施方式
下面结合附图和具体实施例对本发明的技术方案进一步详细阐述。 考虑到现有技术中当终端进入节电模式时， 不能接收寻呼消息， 而网 络在下行数据到达时就会发起对终端的寻呼， 不仅终端无法收到该寻呼消 息， 还会造成网络反复寻呼而导致的不必要的资源浪费。 本发明实施例提 供了一种节电模式下控制信令发送的方法和系统， 下面结合具体实施例进 行详细描述。
本发明实施例一的节电模式下控制信令发送的方法， 适用于终端在 3G 网络和 LTE网络之间的跨网络移动， 该方法的流程如图 2所示， 主要包括 以下步驟：
步驟 201 , 当前驻扎在 3G网络下的终端移动到 LTE网络时， 终端的服 务节点由 SGSN (即旧移动性管理单元） 变更为 MME (即新移动性管理单 元）。 终端发送 TAU请求信令给 MME, 信令中包含终端的标识， 如终端的 国际移动用户识别码 ( IMSI, International Mobile Subscriber Identification Number )或全球唯一临时标识（ GUTI, Globally Unique Temporary ID ), 信 一、 节电参数包括： 激活时间、 睡眠时间； 或
二、 节电参数包括： 激活时间、 节电模式周期。
激活时间， 表示终端可以接收数据和信令的时间； 睡眠时间， 表示终 端不可以接收数据和信令的时间； 节点模式周期， 表示终端在两次激活时 间之间的时长。 其中， 激活时间、 睡眠时间都为时间段。
需要说明的是， 本发明实施例中节电参数的组成形式并非仅限于上述 所举， 节电参数可以只包括激活时间， 还可以只包括睡眠时间和节电模式 周期（节电模式周期减去睡眠时间即可得到激活时间）； 实际应用中任何能 够指明终端可以接收数据和信令时间的节电参数组成形式应当都属于本发 明实施例的保护范围。
步驟 202, MME根据 TAU请求中的 SGSN地址， 发送上下文请求信 令给相应的 SGSN, 该信令中包含终端的标识。
步驟 203 , SGSN根据上下文请求信令中的终端标识查询对应终端的上 下文信息， 上下文信息中包含有终端的承载标识、 安全认证参数、 服务网 关（SGW )名称、 服务网关地址、 以及 ISR支持指示。 SGSN将终端的上 下文信息包含在上下文响应信令中发送给 MME。
其中， ISR支持指示的设置方式为：
使用一个标 i只 "Idle mode Signaling Reduction Supported Indication" , 如 果其值设置为 1 , 表示 SGSN和服务网关有 ISR能力； 如果其值设置为 0, 表示 SGSN或服务网关没有 ISR能力。
步驟 204, MME接收到上下文信息后， 发送上下文确认信令给 SGSN。 如果上下文信息中包含 ISR支持指示，且如果 "Idle mode Signaling Reduction Supported Indication" 设置为 1 , 则 MME激活 ISR模式， 在上下文确认信 令中包含 ISR激活指示和节电参数； 其中， ISR激活指示设置为 1 , 表示 MME已激活 ISR模式。
如果 "Idle mode Signaling Reduction Supported Indication"设置为 0、 或 者 MME不激活 ISR模式，则在 MME的上下文确认信令中的 ISR激活指示 设置为 0, 表示 MME未激活 ISR模式， 且上下文确认信令中不包含节电参 数。
SGSN继续保留终端的上下文信息， 并且保存 MME发送的节电参数。 且如果来自 MME的上下文确认信令中的 ISR激活指示设置为 1 , 则 SGSN 自身也激活 ISR模式。
MME和 SGSN根据节电参数在本地设置和启动节点模式定时器： 如果节电参数包含激活时间和睡眠时间， 则启动一个激活定时器， 其 值设置为节电参数中的激活时间； 激活定时器到时后启动睡眠定时器， 其 值设置为节电参数中的睡眠时间； 在睡眠定时器到时后， 激活定时器会再 次启动；
如果节电参数包含激活时间和节电模式周期， 则启动一个激活定时器， 其值设置为节电参数中的激活时间， 并启动一个节点模式周期定时器， 其 值设置为节电参数中的节电模式周期， 且节电模式周期定时器是循环启动； 在节电模式周期定时器的每个周期到时后， 激活定时器会再次启动。
步驟 205, MME根据上下文信息中的 SGW地址， 发送更新承载请求 信令给相应的 SGW。
步驟 206, SGW接收到 MME发送的更新 载请求信令后， 将 MME 的地址包含在本地承载上下文信息中， 发送更新承载响应信令给 MME。
步驟 207, 当有数据发送给终端时， SGW发送下行数据通知信令给 MME和 SGSN, 下行数据通知信令中包含终端的标识。
由于激活了 ISR模式后， 终端在该 MME和 SGSN之间移动不需要执 行位置更新请求， 因此 SGW不能判断终端目前在 MME还是在 SGSN的服 务范围， 从而需要向 MME和 SGSN都发送下行数据通知信令。
步驟 208~209, MME和 SGSN根据下行数据通知信令中的终端标识查 找本地保存的相应终端的节电参数， 并进行以下判断：
如果当前处于终端的激活时间 ,即激活定时器已启动，则 MME和 SGSN 向 SGW发送下行数据通知确认信令， 该信令中指示将立即发送寻呼消息； MME和 SGSN发送寻呼消息给终端；
如果当前处于终端的睡眠时间， 即激活定时器未启动或睡眠定时器已 启动， 则 MME和 SGSN发送下行数据通知确认信令给 SGW, 该信令中包 含终端的标识和延迟指示。
延迟指示的值可以设置为略大于当前时间到下一个周期激活时间的时 长， 例如： 延迟指示的值 =所述时长（即当前时间到下一个周期激活时间的 时长） +4分钟。 其中， 当前时间到下一个周期激活时间的时长获取的方式 为：
如果 MME或 SGSN运行一个节电模式周期定时器， 则该时长可以设 置为节电模式周期定时器的剩余时间；
如果 MME或 SGSN运行一个睡眠定时器， 则该时长可以设置为睡眠 定时器的剩余时间。
SGW接收到下行数据通知确认信令后， 根据信令中延迟指示的值， 在 该时间内不再发送下行数据通知信令， 并緩存终端的数据。 相应的， MME 和 SGSN不立即发送寻呼消息给终端， 而是在终端的激活时间到来时， 再 发送寻呼消息给终端。
需要说明的是， 由于 MME和 SGSN都保存了终端的上下文信息， 因 此这两个网元都会认为终端在自己的网络， 因此两个网络都会尝试发送寻 呼消息。一旦一个网元接收到终端对寻呼的响应（发送业务请求），则向 SGW 报告， SGW通知另一个网元停止寻呼。
终端接收到寻呼消息后， 向发送该寻呼消息的 MME或 SGSN发送业 务请求；
收到业务请求的 MME或 SGSN发送上下文建立请求信令给基站， 并 在该请求信令中包含 SGW地址； 基站接收到该信令后， 为终端建立无线承 载，并在完成后向 MME或 SGSN发送上下文建立完成信令； MME或 SGSN 将基站的地址发送给 SGW; SGW将下行数据发送到基站， 由基站发送给 终端。
本发明实施例二的节电模式下控制信令发送的方法， 适用于终端在 3G 网络和 LTE网络之间的跨网络移动， 流程如图 3所示， 主要包括以下步驟： 步驟 301 , 当前驻扎在 LTE网络下的终端移动到 3G网络， 终端的服务 节点由 MME(即旧移动性管理单元）变更为 SGSN(即新移动性管理单元）。 终端发送 RAU信令给 SGSN, 信令中包含终端的标识（ IMSI或 GUTI )、 MME的标识、 节电参数。
其中， 节电参数的组成形式可以是：
一、 节电参数包括： 激活时间、 睡眠时间； 或
二、 节电参数包括： 激活时间、 节电模式周期。
激活时间， 表示终端可以接收数据和信令的时间； 睡眠时间， 表示终 端不可以接收数据和信令的时间； 节点模式周期， 表示终端在两次激活时 间之间的时长。 其中， 激活时间、 睡眠时间都为时间段。
需要说明的是， 本发明实施例中节电参数的组成形式并非仅限于上述 所举， 节电参数可以只包括激活时间， 还可以只包括睡眠时间和节电模式 周期（节电模式周期减去睡眠时间即可得到激活时间）； 实际应用中任何能 够指明终端可以接收数据和信令时间的节电参数组成形式应当都属于本发 明实施例的保护范围。 步驟 302, SGSN根据 RAU请求信令中的 MME地址， 发送上下文请 求信令给 MME , 该信令中包含终端的标识。
步驟 303 , MME根据上下文请求信令中的终端标识查询该终端的上下 文信息， 上下文信息包含有终端的承载标识、 安全认证参数、 服务网关名 称、 服务网关地址、 以及 ISR支持指示。 MME将终端的上下文信息包含在 上下文响应信令中发送给 SGSN。
其中， ISR支持指示设置方式为：
使用一个标识 "Idle mode Signaling Reduction Supported Indication" , 如 果其值设置为 1 ,则表示 MME和服务网关有 ISR能力；如果其值设置为 0, 则表示 MME或服务网关没有 ISR能力。
步驟 304, SGSN接收到上下文信息后， 发送上下文确认信令给 MME。 如果上下文信息中包含 ISR支持指示，且如果 "Idle mode Signaling Reduction Supported Indication" 设置为 1 , 则 SGSN激活 ISR模式， 在上下文确认信 令中包含 ISR激活指示和节电参数； 其中， ISR激活指示设置为 1 , 表示 SGSN已激活 ISR模式。
^口果 "Idle mode Signaling Reduction Supported Indication"设置为 0、 或 者 SGSN不激活 ISR模式， 则在 SGSN的上下文确认信令中的 ISR激活指 示设置为 0,表示 SGSN未激活 ISR模式，且上下文确认信令中不包含节电 参数。
MME继续保留终端的上下文信息， 并且保存 SGSN发送的节电参数。 且如果来自 SGSN的上下文确认信令中的 ISR激活指示设置为 1 , 则 MME 自身也激活 ISR模式。
MME和 SGSN根据节电参数在本地设置和启动节点模式定时器： 如果节电参数包含激活时间和睡眠时间， 则启动一个激活定时器， 其 值设置为节电参数中的激活时间； 激活定时器到时后启动睡眠定时器， 其 值设置为节电参数中的睡眠时间； 在睡眠定时器到时后， 激活定时器会再 次启动；
如果节电参数包含激活时间和节电模式周期， 则启动一个激活定时器， 其值设置为节电参数中的激活时间， 并启动一个节点模式周期定时器， 其 值设置为节电参数中的节电模式周期， 且节电模式周期定时器是循环启动； 在节电模式周期定时器的每个周期到时后， 激活定时器会再次启动。
步驟 305, SGSN根据上下文信息中的 SGW地址， 发送更新承载请求 信令给相应的 SGW。
步驟 306, SGW接收到 SGSN发送的更新承载请求后， 将 SGSN的地 址包含在本地承载上下文信息中， 发送更新承载响应信令给 SGSN。
步驟 307, 当有数据发送给终端时， SGW发送下行数据通知信令给 MME和 SGSN, 下行数据通知信令中包含终端的标识。
由于激活了 ISR模式后， 终端在该 MME和 SGSN之间移动不需要执 行位置更新请求， 因此 SGW不能判断终端目前在 MME还是在 SGSN的服 务范围， 因此需要向 MME和 SGSN都发送下行数据通知信令。
步驟 308~309, MME和 SGSN根据下行数据通知信令中的终端标识查 找本地保存的终端的节电参数， 并进行以下判断：
如果当前处于终端的激活时间 ,即激活定时器已启动，则 MME和 SGSN 向 SGW发送下行数据通知确认信令， 该信令中指示将立即发送寻呼消息； MME和 SGSN发送寻呼消息给终端；
如果当前处于终端的睡眠时间， 即激活定时器未启动或睡眠定时器已 启动， 则 MME和 SGSN发送下行数据通知确认信令给 SGW, 该信令中包 含终端的标识和延迟指示。
延迟指示的值可以设置为略大于当前时间到下一个周期激活时间的时 长， 例如： 延迟指示的值 =所述时长（即当前时间到下一个周期激活时间的 时长） +4分钟。其中当前时间到下一个周期激活时间的时长获取的方式为： 如果 MME或 SGSN运行一个节电模式周期定时器， 该时长可以设置 为节电模式周期定时器的剩余时间；
如果 MME或 SGSN运行一个睡眠定时器， 该时长可以设置为睡眠定 时器的剩余时间。
SGW接收到下行数据通知确认信令后， 根据该信令中延迟指示的值， 在该时间内不再发送下行数据通知信令，并緩存终端的数据。相应的， MME 和 SGSN不立即发送寻呼消息给终端， 而在终端的激活时间到来时， 再发 送寻呼消息给终端。
需要说明的是， 由于 MME和 SGSN都保存了终端的上下文信息， 因 此这两个网元都会认为终端在自己的网络， 因此两个网络都会尝试发送寻 呼消息。一旦一个网元接收到终端对寻呼的响应（发送业务请求），则向 SGW 报告， SGW再通知另一个网元停止寻呼。
终端接收到寻呼消息后， 向发送该寻呼消息的 MME或 SGSN发送业 务请求；
收到业务请求的 MME或 SGSN发送上下文建立请求信令给基站， 并 在该请求信令中包含 SGW地址，基站接收到该信令后， 为终端建立无线承 载，并在完成后向 MME或 SGSN发送上下文建立完成信令； MME或 SGSN 将基站的地址发送给 SGW; SGW将下行数据发送到基站， 由基站发送给 终端。
本发明实施例三的节电模式下控制信令发送的方法，适用于终端在 LTE 网络内部的跨跟踪区移动， 该方法的流程如图 4所示， 主要包括以下步驟： 步驟 401 ,跟踪区是网络用于管理终端所处位置而划分的范围区域， 终 端注册到网络以后会被分配在一个跟踪区， 在终端移动过程中， 可能移动 到一个新的跟踪区。 当终端移动到新的跟踪区时， 终端发送 TAU请求信令给新跟踪区的 MME, 该信令中包含节电参数。
其中， 节电参数的组成形式可以是：
一、 节电参数包括： 激活时间、 睡眠时间； 或
二、 节电参数包括： 激活时间、 节电模式周期。
激活时间， 表示终端可以接收数据和信令的时间； 睡眠时间， 表示终 端不可以接收数据和信令的时间； 节点模式周期， 表示终端在两次激活时 间之间的时长。 其中， 激活时间、 睡眠时间都为时间段。
需要说明的是， 本发明实施例中节电参数的组成形式并非仅限于上述 所举， 节电参数可以只包括激活时间， 还可以只包括睡眠时间和节电模式 周期（节电模式周期减去睡眠时间即可得到激活时间）； 实际应用中任何能 够指明终端可以接收数据和信令时间的节电参数组成形式应当都属于本发 明实施例的保护范围。
步驟 402, 新 MME根据 TAU请求中的旧 MME地址， 发送上下文请 求信令给旧 MME, 该信令中包含终端的标识（ IMSI或 GUTI )0
步驟 403 , 旧 MME根据新 MME发送的终端标识查询该终端的上下文 信息， 上下文信息包含有终端的承载标识、 安全认证参数、 服务网关名称、 服务网关地址；旧 MME将终端的上下文信息包含在上下文响应信令中发送 给新 MME。
步驟 404, 新 MME接收到上下文信息后， 发送上下文确认信令给旧 MME。
步驟 405, 新 MME根据上下文信息中的 SGW地址， 发送更新承载请 求信令给相应的 SGW, 该信令中包含节电参数。
步驟 406, SGW将接收到的节电参数保存， 将新 MME的标识或地址 保存后， 发送更新 载响应信令给新 MME。 步驟 407 , SGW根据节电参数在本地设置和启动节点模式定时器： 如果节电参数包含激活时间和睡眠时间， 则启动一个激活定时器， 其 值设置为节电参数中的激活时间； 激活定时器到时后启动睡眠定时器， 其 值设置为节电参数中的睡眠时间； 在睡眠定时器到时后， 激活定时器会再 次启动；
如果节电参数包含激活时间和节电模式周期， 则启动一个激活定时器， 其值设置为节电参数中的激活时间， 并启动一个节点模式周期定时器， 其 值设置为节电参数中的节电模式周期， 且节电模式周期定时器是循环启动； 在节电模式周期定时器的每个周期到时后， 激活定时器会再次启动。
步驟 408~409, 当有数据发送给终端时， SGW根据各个节电模式定时 器进行以下判断：
如果当前处于终端的激活时间， 即激活定时器已启动， 则 SGW发送下 行数据通知信令给新 MME;
如果当前处于终端的睡眠时间， 即激活定时器未启动或睡眠定时器已 启动， 则 SGW緩存终端的数据， 等到激活定时器启动时， 发送下行数据通 知信令给新 MME。
新 MME接收到 SGW发送的下行数据通知信令后，发送下行数据通知 确认信令给 SGW, 确认已收到该信令， 且该信令中指示将立即发送寻呼消 息； 新 MME发送寻呼消息给终端。
终端接收到寻呼消息后， 向新 MME发送业务请求；
新 MME发送上下文建立请求给基站，并在请求信令中包含 SGW地址， 基站接收到该信令后，为终端建立无线承载，并在完成后向 MME发送上下 文建立完成信令； MME将基站的地址发送给 SGW; SGW将下行数据发送 到基站， 由基站发送给终端。
综上所述， 本发明实施例提供的一种节电模式下控制信令发送的方法， 如图 5所示， 主要包括：
步驟 501，终端发送跟踪区更新请求信令或路由区更新请求信令给新移 动性管理单元， 信令中包括节电参数；
步驟 502,新移动性管理单元将节电参数发送给旧移动性管理单元或服 务网关。
较佳的， 所述新移动性管理单元将节电参数发送给旧移动性管理单元， 包括：
新移动性管理单元发送上下文请求信令给旧移动性管理单元； 旧移动性管理单元发送上下文响应信令给所述新移动性管理单元， 所 述上下文响应信令中包含 ISR支持指示；
新移动性管理单元发送上下文确认信令给旧移动性管理单元， 所述上 下文确认信令中包含 ISR激活指示和节电参数。
相应的， 在所述新移动性管理单元将节电参数发送给旧移动性管理单 元之后， 该方法还包括：
当服务网关发送通知信令给新移动性管理单元和旧移动性管理单元 时， 新移动性管理单元和旧移动性管理单元根据终端的节电参数判断： 如果当前处于终端的激活时间， 则新移动性管理单元和旧移动性管理 单元发送寻呼消息给终端；
如果当前处于终端的非激活时间， 则新移动性管理单元和旧移动性管 理单元发送反馈信令给服务网关， 反馈信令中包括延迟指示。
较佳的， 所述新移动性管理单元将节电参数发送给服务网关， 包括： 新移动性管理单元发送更新承载请求信令给服务网关， 更新承载请求信令 中包括节电参数。
相应的， 在所述新移动性管理单元将节电参数发送给服务网关之后， 该方法还包括： 服务网关根据节电参数控制信令发送： 当有数据需要发送给终端时， 如果当前处于终端的激活时间， 服务网 关发送下行数据通知信令给新移动性管理单元； 如果当前处于终端的非激 活时间， 服务网关緩存终端的数据， 等到终端的激活时间， 发送下行数据 通知信令给新移动性管理单元。
对应上述实施例的方法， 本发明实施例提供的一种节电模式下控制信 令发送的系统， 如图 6所示， 该系统包括： 终端 10、新移动性管理单元 20、 旧移动性管理单元 30和服务网关 40, 其中，
终端 10, 用于发送跟踪区更新请求信令或路由区更新请求信令给新移 动性管理单元 20, 信令中包括节电参数；
新移动性管理单元 20,用于将节电参数发送给旧移动性管理单元 30或 服务网关 40;
旧移动性管理单元 30和服务网关 40对接收的节电参数进行保存。 较佳的， 新移动性管理单元 20进一步用于， 发送上下文请求信令给旧 移动性管理单元 30;
旧移动性管理单元 30进一步用于， 发送上下文响应信令给所述新移动 性管理单元 20, 所述上下文响应信令中包含空闲模式信令减少模式 ISR支 持指示；
新移动性管理单元 20还用于， 发送上下文确认信令给所述旧移动性管 理单元 30, 所述上下文确认信令中包含 ISR激活指示和节电参数。
较佳的， 在所述新移动性管理单元 20将节电参数发送给旧移动性管理 单元 30之后，
新、 旧移动性管理单元进一步用于， 当服务网关 40发送通知信令给所 述新移动性管理单元 20和旧移动性管理单元 30时， 根据所述终端的节电 参数判断：
如果当前处于所述终端的激活时间， 则所述新移动性管理单元 20和旧 移动性管理单元 30发送寻呼消息给所述终端 10;
如果当前处于所述终端的非激活时间， 则所述新移动性管理单元 20和 旧移动性管理单元 30发送反馈信令给服务网关 40,所述反馈信令中包括延 迟指示。
较佳的， 新移动性管理单元 20进一步用于， 发送更新承载请求信令给 服务网关 40, 所述更新承载请求信令中包括所述节电参数。
在所述新移动性管理单元 20将节电参数发送给服务网关 40之后， 所 述服务网关 40进一步用于， 根据节电参数控制信令发送：
当有数据需要发送给终端时， 如果当前处于终端的激活时间， 服务网 关 40发送下行数据通知信令给新移动性管理单元 20;如果当前处于终端的 非激活时间， 服务网关 40緩存终端的数据， 等到终端的激活时间， 发送下 行数据通知信令给新移动性管理单元 20。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围。

Claims

权利要求书
1、 一种节电模式下控制信令发送的方法， 该方法包括：
终端发送跟踪区更新请求信令或路由区更新请求信令给新移动性管 理单元， 所述信令中包括节电参数；
所述新移动性管理单元将节电参数发送给旧移动性管理单元或服务 网关。
2、 根据权利要求 1所述节电模式下控制信令发送的方法， 其中， 所 述新移动性管理单元将节电参数发送给旧移动性管理单元， 包括：
所述新移动性管理单元发送上下文请求信令给旧移动性管理单元； 所述旧移动性管理单元发送上下文响应信令给所述新移动性管理单 元， 所述上下文响应信令中包含空闲模式信令减少模式 ISR支持指示； 所述新移动性管理单元发送上下文确认信令给所述旧移动性管理单 元， 所述上下文确认信令中包含 ISR激活指示和节电参数。
3、 根据权利要求 2所述节电模式下控制信令发送的方法， 其中， 在 所述新移动性管理单元将节电参数发送给旧移动性管理单元之后， 该方 法还包括：
当服务网关发送通知信令给所述新移动性管理单元和旧移动性管理 单元时， 所述新移动性管理单元和旧移动性管理单元根据所述终端的节 电参数判断：
如果当前处于所述终端的激活时间， 则所述新移动性管理单元和旧 移动性管理单元发送寻呼消息给所述终端；
如果当前处于所述终端的非激活时间， 则所述新移动性管理单元和 旧移动性管理单元发送反馈信令给服务网关， 所述反馈信令中包括延迟 指示。
4、 根据权利要求 1所述节电模式下控制信令发送的方法， 其中， 所 述新移动性管理单元将节电参数发送给服务网关， 包括：
所述新移动性管理单元发送更新承载请求信令给服务网关， 所述更 新承载请求信令中包括所述节电参数。
5、 根据权利要求 4所述节电模式下控制信令发送的方法， 其中， 在 所述新移动性管理单元将节电参数发送给服务网关之后， 该方法还包括： 所述服务网关根据节电参数控制信令发送：
当有数据需要发送给终端时， 如果当前处于终端的激活时间， 服务 网关发送下行数据通知信令给新移动性管理单元； 如果当前处于终端的 非激活时间， 服务网关緩存终端的数据， 等到终端的激活时间， 发送下 行数据通知信令给新移动性管理单元。
6、根据权利要求 1至 5任一项所述节电模式下控制信令发送的方法， 其中， 所述节电参数包括激活时间和节电模式周期； 或包括激活时间和 睡眠时间。
7、 一种节电模式下控制信令发送的系统， 该系统包括： 终端、 新移 动性管理单元、 旧移动性管理单元和服务网关， 其中，
所述终端， 用于发送跟踪区更新请求信令或路由区更新请求信令给 新移动性管理单元， 所述信令中包括节电参数；
所述新移动性管理单元， 用于将节电参数发送给旧移动性管理单元 或服务网关；
所述旧移动性管理单元和服务网关对接收的节电参数进行保存。
8、 根据权利要求 7所述节电模式下控制信令发送的系统， 其中， 所述新移动性管理单元还用于， 发送上下文请求信令给旧移动性管 理单元；
所述旧移动性管理单元还用于， 发送上下文响应信令给所述新移动 性管理单元， 所述上下文响应信令中包含空闲模式信令减少模式 ISR支 持指示；
所述新移动性管理单元还用于， 发送上下文确认信令给所述旧移动 性管理单元， 所述上下文确认信令中包含 ISR激活指示和节电参数。
9、 根据权利要求 8所述节电模式下控制信令发送的系统， 其中， 在 所述新移动性管理单元将节电参数发送给旧移动性管理单元之后，
所述新、 旧移动性管理单元还用于， 当服务网关发送通知信令给所 述新移动性管理单元和旧移动性管理单元时， 根据所述终端的节电参数 判断：
如果当前处于所述终端的激活时间， 则所述新移动性管理单元和旧 移动性管理单元发送寻呼消息给所述终端；
如果当前处于所述终端的非激活时间， 则所述新移动性管理单元和 旧移动性管理单元发送反馈信令给服务网关， 所述反馈信令中包括延迟 指示。
10、 根据权利要求 7 所述节电模式下控制信令发送的系统， 其中， 所述新移动性管理单元还用于， 发送更新承载请求信令给服务网关， 所 述更新承载请求信令中包括所述节电参数。
11、 根据权利要求 10所述节电模式下控制信令发送的系统， 其中， 在所述新移动性管理单元将节电参数发送给服务网关之后， 所述服务网 关还用于， 根据节电参数控制信令发送：
当有数据需要发送给终端时， 如果当前处于终端的激活时间， 服务 网关发送下行数据通知信令给新移动性管理单元； 如果当前处于终端的 非激活时间， 服务网关緩存终端的数据， 等到终端的激活时间， 发送下 行数据通知信令给新移动性管理单元。
12、 根据权利要求 7至 11任一项所述节电模式下控制信令发送的系 统， 其中， 所述节电参数包括激活时间和节电模式周期； 或包括激活时 间和睡眠时间
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US20150139054A1 (en) 2015-05-21
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