WO2018081956A1 - 一种信息发送方法、设备和系统 - Google Patents

一种信息发送方法、设备和系统 Download PDF

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Publication number
WO2018081956A1
WO2018081956A1 PCT/CN2016/104363 CN2016104363W WO2018081956A1 WO 2018081956 A1 WO2018081956 A1 WO 2018081956A1 CN 2016104363 W CN2016104363 W CN 2016104363W WO 2018081956 A1 WO2018081956 A1 WO 2018081956A1
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WO
WIPO (PCT)
Prior art keywords
network device
access network
terminal
information
context information
Prior art date
Application number
PCT/CN2016/104363
Other languages
English (en)
French (fr)
Inventor
杜君
李秉肇
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201680090573.5A priority Critical patent/CN109906663B/zh
Priority to PCT/CN2016/104363 priority patent/WO2018081956A1/zh
Priority to EP16920914.5A priority patent/EP3531782B1/en
Publication of WO2018081956A1 publication Critical patent/WO2018081956A1/zh
Priority to US16/400,236 priority patent/US10849097B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • 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
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, device, and system for transmitting information.
  • a terminal can access a core network (Core Network, CN) through a Radio Access Network (RAN).
  • Core Network Core Network
  • RAN Radio Access Network
  • the terminal can access the core network device in the CN through an access network device in the RAN.
  • the access network device needs to save the context information of the terminal.
  • the context information of the terminal is generally large, which occupies a lot of storage space of the access network device.
  • the number of terminals supported by one access network device is large, which causes the memory cost of the access network device to be very high.
  • the embodiment of the invention describes a method, a device and a system for transmitting information, so as to alleviate the problem of high memory cost of the access network device.
  • an embodiment of the present invention provides a method for transmitting information, where the method is used in a communication system, where the communication system includes a first access network device and a core network device, and the first access network device and the core network device have For the connection of the terminal, the method includes: the first access network device determines that the context information of the terminal needs to be acquired; then, the first access network device sends a request message to the core network device, where the request message is used to request context information of the terminal; The network device sends a response message to the first access network device, and the response message carries the context information of the terminal.
  • the foregoing connection to the terminal may be an activated connection or a deactivated connection.
  • the first access network device when determining the context information of the terminal, may request the context information of the terminal from the core network device without saving the context information of the terminal in advance. Therefore, the solution of the embodiment of the present invention can save the storage space of the access network device and reduce the memory cost of the access network device.
  • the above connection to the terminal may be an S1 connection to the terminal.
  • the context information of the foregoing terminal may include at least one of the following: terminal capability information, handover restriction list information, security information, or Track activation information.
  • the above method can be used in another communication system, the communication system includes a paging area, and the paging area includes at least a first access network device, and the first access network device and the core network device There is a connection between them.
  • the first access network device determines that the context information that needs to acquire the terminal may include one of the following situations:
  • the first scenario the first access network device receives the second downlink data or the second downlink signaling from the core network device, and the first access network device determines, according to the second downlink signaling or the second downlink signaling, that the terminal needs to be acquired. Contextual information.
  • the first access network device receives the paging response from the terminal, and the first access network device determines, according to the paging response, that the context information of the terminal needs to be acquired.
  • the first access network device receives the first indication information from the second access network device, and the first access network device determines, according to the first indication information, that the context information of the terminal needs to be acquired.
  • the second access network device may belong to the paging area.
  • the first access network device may further receive the first downlink data or the first downlink information from the core network device. And sending a paging message to the second access network device, the paging message being used to page the terminal.
  • the fourth scenario the first access network device receives the second indication information from the terminal, and the first access network device determines, according to the second indication information, that the context information of the terminal needs to be acquired.
  • the request message sent by the first access network device to the core network device may be a capability query message, a connection activation message, a connection recovery message, a context request message, a terminal information request message, or a capability matching message.
  • the response message sent by the core network device to the first access network device may be a response message of the capability query message, the connection activation message, the connection recovery message, the context request message, the terminal information request message, or the capability matching message, for example, the The response message is a capability query response message, a connection recovery response message, or a context request response message.
  • the first access network device may further send the context information of the terminal to the second access network device.
  • the first access network device may send a context transfer message to the second access network device, where the context transfer message carries the context information of the terminal.
  • an embodiment of the present invention provides another method for transmitting information, which is used in a communication system, where the communication system includes a paging area, and the paging area includes at least an access network device, an access network device, and a core.
  • the network device has a connection
  • the method includes: the access network device receives the indication information from the terminal, the indication information is used to indicate that the terminal is switched from the light connection state to the connection state; and then the access network device sends the first configuration message to the terminal, where A configuration message is used to convert the terminal from the light connection state to the connection state; the access network device sends a request message to the terminal, and the request message is used to request the context information of the terminal; the terminal sends a response message to the access network device, and the response message carries the terminal.
  • Contextual information may be an activated connection or a deactivated connection.
  • the access network device when the terminal needs to switch from the light connection state to the connection state, the access network device obtains the context of the terminal after transmitting the first configuration message to the terminal to convert the terminal from the light connection state to the connection state. Information without having to save the context information of the terminal in advance. Therefore, the solution of the embodiment of the present invention can save the storage space of the access network device and reduce the memory cost of the access network device.
  • the above connection may be an S1 connection to the terminal.
  • the context information of the foregoing terminal may include terminal capability information.
  • the access network device involved in this aspect may be the first access network device.
  • the access network device may also receive the first configuration completion message from the terminal, where the first configuration completion message is used to indicate that the terminal has switched from the light connection state to the connection state. .
  • the access network device may also send a second configuration message to the terminal, where the second configuration message is used to configure the service capability for the terminal. Further, the access network device may further receive a second configuration completion message from the terminal, where the second configuration completion message is used to indicate that the terminal has configured the service capability. Therefore, after obtaining the context information of the terminal, the solution of the embodiment of the present invention may send a second configuration message to the terminal to configure the service capability for the terminal, so that the terminal can obtain rich service services.
  • an embodiment of the present invention provides a first access network device, where the first access network device has a function of implementing behavior of a first access network device in the foregoing method design.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the first access network device includes a processor configured to support the first access network device to perform a corresponding function in the above method. Further, the first access network device may further include a communication interface, where the communication interface is used to support communication between the first access network device and the second access network device or the core network device. Further, the first access network device may further include storage The memory is for coupling with a processor that stores program instructions and data necessary for the first access network device.
  • an embodiment of the present invention provides a second access network device, where the second access network device has a function of implementing behavior of a second access network device in the foregoing method design.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the second access network device includes a processor configured to support the second access network device to perform a corresponding function in the above method. Further, the second access network device may further include a communication interface, a transmitter, and a receiver, where the communication interface is configured to support communication between the second access network device and the first access network or the core network device, where the transmitting And a receiver is used to support communication between the second access network device and the terminal. Further, the second access network device may further include a memory for coupling with the processor, which stores necessary program instructions and data of the second access network device.
  • an embodiment of the present invention provides a core network device, where the core network device has a function of implementing a behavior of a core network device in the foregoing method design.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the core network device includes a processor configured to support the core network device to perform the corresponding functions of the above methods. Further, the core network device may further include a communication interface, where the communication interface is used to support communication between the core network device and the first access network device or the second access network device. Further, the core network device may further include a memory for coupling with the processor, which stores necessary program instructions and data of the core network device.
  • an embodiment of the present invention provides a terminal, where the terminal has a function of implementing terminal behavior in the design of the foregoing method.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the terminal includes a processor configured to support the terminal in performing the corresponding functions of the above methods. Further, the terminal may further include a transmitter and a receiver for supporting communication between the terminal and the access network device. Further, the terminal may further include a memory for coupling with the processor, which stores program instructions and data necessary for the terminal.
  • the embodiment of the present invention provides a communication system, where the system includes the first access network device and the second access network device, and the system includes the first access in the foregoing aspect.
  • Network device, second access network device, and core network device are included in the foregoing aspect.
  • an embodiment of the present invention provides a computer storage medium for storing the computer software instructions for use in the first access network device, including a program designed to perform the above aspects.
  • an embodiment of the present invention provides a computer storage medium for storing the computer software instructions for the second access network device, including a program designed to perform the above aspects.
  • an embodiment of the present invention provides a computer storage medium for storing the above-mentioned computer software instructions for a core network device, including a program designed to perform the above aspects.
  • an embodiment of the present invention provides a computer storage medium for storing the above-mentioned computer software instructions for a terminal, which includes a program designed to execute the above aspects.
  • the first access network device after receiving the signaling of the terminal sent by the core network device, the first access network device sends a first paging message to the second access network device, when When receiving the first indication message sent by the second access network device, the terminal can access the second access network device, so as to perform reasonable subsequent processing.
  • the first access network device when determining that the context information of the terminal needs to be acquired, the first access network device may request the context information of the terminal from the core network device without saving the context of the terminal in advance. information. Therefore, the solution of the embodiment of the present invention can save the storage space of the access network device and reduce the memory cost of the access network device.
  • FIG. 1 is a schematic diagram of a possible application scenario according to an embodiment of the present disclosure
  • FIG. 2A is a schematic diagram of a possible network architecture according to an embodiment of the present invention.
  • FIG. 2B is a schematic diagram of another possible network architecture according to an embodiment of the present invention.
  • 2C is a possible schematic diagram of a prior art solution
  • FIG. 3 is a schematic diagram of communication of an information sending method according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of communication of another information sending method according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of communication according to still another method for transmitting information according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of communication of another method for sending information according to an embodiment of the present invention.
  • FIG. 7 is a schematic block diagram of a first access network device according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic block diagram of a second access network device according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of an access network device according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic block diagram of a core network device according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of a core network device according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic block diagram of a terminal according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • the network architecture and the service scenario described in the embodiments of the present invention are used to more clearly illustrate the technical solutions of the embodiments of the present invention, and do not constitute a limitation of the technical solutions provided by the embodiments of the present invention.
  • the technical solutions provided by the embodiments of the present invention are equally applicable to similar technical problems.
  • FIG. 1 some possible application scenarios and network architectures applicable to the embodiments of the present invention are introduced in conjunction with FIG. 1 , FIG. 2A and FIG. 2B .
  • FIG. 1 shows an application scenario that may be applicable to an embodiment of the present invention.
  • the terminal accesses an operator's Internet Protocol (IP) service network through a radio access network and a core network, such as an IP Multimedia System (IMS) network and a packet switched flow service (Packet Switched). Streaming Service, Jane PSS) Network, etc.
  • IP Internet Protocol
  • IMS IP Multimedia System
  • Packet Switched Packet Switched
  • Streaming Service Jane PSS
  • LTE Long Term Evolution
  • CDMA Code Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • TDMA Time Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • TDMA Time Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • TDMA Time Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • FIG. 2A illustrates a possible network architecture provided by an embodiment of the present invention.
  • the network architecture includes: a core network device, an access network device, and a terminal.
  • the terminal 201 can access the core network device through the access network device 101.
  • the core network device is connected to the access network device 101, and the access network device 101 and the terminal 201 can perform wireless communication.
  • FIG. 2B illustrates another possible network architecture provided by an embodiment of the present invention.
  • the network architecture includes: a core network device, a terminal, and multiple access network devices.
  • the access network device 101 and the access network device 102 are in the same paging area, such as the first paging area; the access network device 103 is in another paging area, such as the second paging area.
  • the access network device 101 may be referred to as an anchor access network device of the first paging area.
  • An anchor access network device refers to an access network device that stores context information of a terminal and maintains a connection between the terminal and a core network device, which is connected to the core network device and is connected to other accesses in the first paging area.
  • terminal 201 is in a lightly connected state.
  • the interface between the terminal and the core network device is kept at the anchor access network device, and the terminal does not need to notify the anchor access network device to move in a certain area, and the notification is not notified when the mobile area is moved out of the certain area.
  • the anchor accesses the network device.
  • the terminal 201 can maintain the interface between the terminal 201 and the core network device through the access network device in the first paging area, and the terminal 201 does not need to notify the access network device 101 when moving in the first paging area, when the terminal When the first paging area is moved out of 201, the access network device 101 is notified.
  • the light connection state may be a sub-state of a Radio Resource Control (RRC) connection state, or may be an enhanced state of an idle state. It is an independent state.
  • RRC Radio Resource Control
  • the light connection state may also have other names.
  • the light connection state may also be referred to as an inactive state, a deactivated state, a low active state, or a low overhead state.
  • the embodiment of the present invention does not limit the name or form of the light connection state.
  • the paging area involved in the network architecture shown in FIG. 2B may be a name of a cell set managed by the access network device.
  • the access network device When the terminal moves in the cell set, there is no need to notify the access network device that configures the paging area for the terminal; when the terminal moves out of the cell set, the access network device needs to be notified.
  • the access network device in the cell set needs to communicate with the terminal, it needs to page in the terminal in all cells included in the cell set.
  • the paging area may also be referred to as a registration area of the terminal, a light connection area of the terminal, a management area of the terminal, an access network registration area of the terminal, a tracking area of the terminal, or an access network tracking area of the terminal.
  • the embodiment of the invention is not limited.
  • the terminal involved in the embodiments of the present invention may include various handheld devices, in-vehicle devices, wearable devices, computing devices, or other processing devices connected to the wireless modem, and various forms of user equipment (User Equipment). , UE), mobile station (MS), terminal device, and the like.
  • User Equipment User Equipment
  • UE user equipment
  • MS mobile station
  • terminal device and the like.
  • An access network device is a device deployed in a radio access network to provide a wireless communication function for a terminal.
  • the access network device may be a base station (BS), and the base station may include various forms of macro base stations, micro base stations, relay stations, access points, and the like.
  • the name of a device with a base station function may be different, for example, in a Long Term Evolution (LTE) system, called an evolved Node B (eNB).
  • eNB evolved Node B
  • eNodeB in a 3rd generation (3G) communication system, called a Node B (Node B) or the like.
  • LTE Long Term Evolution
  • eNB evolved Node B
  • 3G 3rd generation
  • Node B Node B
  • the foregoing apparatus for providing a wireless communication function for a terminal is collectively referred to as an access network device.
  • the core network device involved in the embodiments of the present invention may include different devices in different systems.
  • a core network device may include a Mobility Management Entity (MME) or a Serving Gateway (SGW), and the core network device may include a serving GPRS support node (Serving) in the 3G communication system.
  • MME Mobility Management Entity
  • SGW Serving Gateway
  • GPRS support node Serving GPRS support node
  • SGSN GPRS Support Node
  • GGSN Gateway GPRS support Node
  • GPRS is a general packet radio system (General Packet Radio) Abbreviation for System).
  • the core network device involved in the embodiments of the present invention may further include a 5G system or a core network device in other systems that may appear in the future.
  • the access network device needs to save the context information of the terminal. For example, when the terminal is in the connected state, the access network device needs to save the context information of the terminal. For another example, when the terminal enters the light connection state, the anchor access network device needs to save the context information of the terminal.
  • the anchor access network device When the terminal is awakened, if the terminal has moved to the range of other access network devices, the anchor access network device also needs to relocate the context information of the terminal to other access network devices. The above terminal is awakened means that the terminal is switched from a lightly connected state to a connected state.
  • the terminal and the access network device when the terminal is in the connected state, the terminal and the access network device have a radio bearer, and the access network device and the core network device have an S1 bearer, and the access network device stores the context of the terminal. information.
  • the access network device and the core network device When the terminal is in the light connection state, the access network device and the core network device have an S1 bearer, and the access network device stores the context information of the terminal. It can be understood that, for a terminal, having an S1 bearer between the access network device and the core network device means that the access network device and the core network device have a connection with the terminal.
  • the context information of the terminal is generally large, which occupies a lot of storage space of the access network device.
  • the number of terminals supported by one access network device is large, which causes the memory cost of the access network device to be very high.
  • the embodiments of the present invention provide an information sending method, and an access network device, a core network device, a terminal, and a system based on the method.
  • the method is used in a communication system, where the communication system includes a first access network device and a core network device, and the first access network device and the core network device have a connection for the terminal, and the method includes: the first access network The device determines that the context information of the terminal needs to be acquired; the first access network device sends a request message to the core network device, where the request message is used to request context information of the terminal; and the core network device sends a response message to the first access network device, the response The message carries the context information of the terminal.
  • connection to the terminal may be an activated connection or a deactivated connection.
  • the above connection to the terminal may be an S1 connection to the terminal.
  • the first access network device when determining that the context information of the terminal needs to be acquired, the first access network device may request the context information of the terminal from the core network device without saving the terminal in advance. Contextual information. It can be seen that the solution of the embodiment of the present invention can save the storage space of the access network device and reduce the memory cost of the access network device.
  • the first access network device determines that context information of the terminal needs to be acquired.
  • the determining, by the first access network device, that the context information of the terminal needs to be acquired may include one of the following situations:
  • the first scenario the first access network device receives the second downlink data or the second downlink signaling from the core network device, and the first access network device determines, according to the second downlink signaling or the second downlink signaling, that the terminal needs to be acquired.
  • Contextual information For example, after receiving the second downlink data or the second downlink signaling, the first access network device learns that the second downlink data or the second downlink signaling is sent to the terminal, but the first access network device does not have a local
  • the context information of the terminal is saved, so it is determined that the context information of the terminal needs to be acquired, so that the second downlink data or the second downlink signaling is sent to the terminal.
  • the first access network device receives the paging response from the terminal, and the first access network device determines, according to the paging response, that the context information of the terminal needs to be acquired. For example, after receiving the paging response of the terminal, the first access network device finds that the context information of the terminal is not saved locally, and therefore determines that the context information of the terminal needs to be obtained, so as to ensure that the first access network device is followed by the terminal. Communication between.
  • the first access network device receives the first indication information from the second access network device, and the first access network device determines, according to the first indication information, that the context information of the terminal needs to be acquired. For example, after the first access network device receives the first indication information from the second access network device, it is learned that the second access network device needs the context information of the terminal, and the first access network device does not locally save the context information of the terminal. Therefore, it is determined that the context information of the terminal needs to be acquired, so that the context information of the terminal is sent to the second access network device.
  • the first access network device may further receive the first downlink data or the first downlink information from the core network device. And sending a paging message to the second access network device, the paging message being used to page the terminal.
  • the fourth scenario the first access network device receives the second indication information from the terminal, and the first access network device determines, according to the second indication information, that the context information of the terminal needs to be acquired. For example, after the first access network device receives the second indication information from the terminal, it is learned that the terminal needs to be switched from the light connection state to the connection state, and the first access network device does not locally save the context information of the terminal, so it is determined that the terminal needs to be obtained. End The context information of the terminal is used to convert the terminal from the lightly connected state to the connected state by using the context information of the terminal.
  • the context information of the terminal may include at least one of the following: terminal capability information, handover restriction list information, security information, or tracking activation information.
  • terminal capability information e.g., terminal capability information, handover restriction list information, security information, or tracking activation information.
  • handover restriction list information e.g., terminal capability information
  • security information e.g., security information
  • tracking activation information e.g., tracking activation information
  • the terminal capability information may include at least one of the following: a terminal capability level (eg, UE-Category), access layer protocol information of the terminal (eg, accessStratumRelease information), frequency band information supported by the terminal (eg, supported BandlistEUTRA information), and a carrier supported by the terminal.
  • a terminal capability level eg, UE-Category
  • access layer protocol information of the terminal eg, accessStratumRelease information
  • frequency band information supported by the terminal eg, supported BandlistEUTRA information
  • a carrier supported by the terminal eg, a carrier supported by the terminal.
  • the ability to aggregate Carrier Aggregation, CA) or Dual Connectivity (DC) (eg supportedBandCombination/dc-Support-r12) or the inter-frequency system measurement capability of the terminal (eg interFreqNeedForGaps and interRAT-NeedForGaps).
  • the handover restriction list information refers to: a reference information of a radio access technology or a radio access layer instance that constrains an access layer device to select a service or a terminal to move to a target.
  • the handover restriction list information may include restriction information of a public land mobile network (PLMN) or a radio access technology (RAT) that prohibits handover.
  • PLMN public land mobile network
  • RAT radio access technology
  • the security information refers to a security type algorithm that the terminal can use and information about security activities such as issuing a key.
  • the security information may include: terminal security capabilities (eg, UE security capabilities) or security keys.
  • the tracking activation information may include a tracking code, Minimization of Drive Tests (MDT) configuration information, and the like.
  • MDT Minimization of Drive Tests
  • the first access network device sends a request message to the core network device, where the request message is used to request context information of the terminal.
  • the request message may be a capability query (eg, UE capability enquiry) message, a connection activation message, a connection recovery message, a context request message, a terminal information request message (eg, UE information request), or a capability matching message (eg, UE radio) Capability match request).
  • a capability query eg, UE capability enquiry
  • a connection activation message e.g., a connection activation message
  • a connection recovery message e.g., a context request message
  • a terminal information request message eg, UE information request
  • a capability matching message eg, UE radio Capability match request
  • the core network device sends a response message to the first access network device, where the response message carries the context information of the terminal.
  • the response message may be a response to the capability query message, connection activation message, connection recovery message, context request message, terminal information request message, or capability matching message.
  • the response message is a capability query response, a connection recovery response message, or a context request response message.
  • the first access network device may further send the context information of the terminal to the second access network device.
  • the first access network device may send a context transfer message to the second access network device, where the context transfer message carries the context information of the terminal.
  • the method shown in FIG. 3 above can be applied to the network architecture shown in FIG. 2A or 2B.
  • the method can be used in another communication system, the communication system includes a paging area, and the paging area includes at least a first access network.
  • the device has a connection between the first access network device and the core network device.
  • the second access network device may belong to the paging area.
  • the method shown in FIG. 4 can be applied to the network architecture shown in FIG. 2B.
  • the first access network device receives the first indication information from the second access network device, or the first access network device receives the second indication information from the terminal as an example, for the first access
  • the process in which the network device determines the context information that needs to acquire the terminal is described.
  • the 401 to the 403 are respectively different parts of the first access network device that receive the first indication information or the second indication information, and are optional parts.
  • any one of the sections 401 to 403 may be performed, that is, after the 401 part, the 402 part, or the 403 part is executed, the 404 part is executed.
  • the 401 part is a case where the first access network device receives the first indication information from the second access network device, and specifically includes the 4011 to 4016 part.
  • Section 401 can be understood as the case where the first downlink data or the first downlink signaling triggers the terminal to switch from the light connection state to the connected state.
  • the core network device sends the first downlink data or the first downlink signaling to the first access network device.
  • the first access network device sends a first paging message to the terminal.
  • the first access network device sends a second paging message to the second access network device, and the second paging message is used to page the terminal.
  • the second access network device sends a third paging message to the terminal.
  • the terminal sends a paging response to the second access network device.
  • part 4015 when the terminal receives the first paging message sent by the first access network device and the third paging message sent by the second access network device, the terminal does not send to the first access network device.
  • the paging response is sent, and it can be seen that the terminal has moved out of the range of the first access network device.
  • the second access network device sends the second indication information to the first access network device.
  • the second indication information may be used to indicate that the terminal is converted from the light connection state to the connection state.
  • the 402 part is another case where the first access network device receives the second indication information from the second access network device, and specifically includes the 4021 part and the 4022 part.
  • Section 402 can be understood as the case where the terminal actively needs to switch from the light connection state to the connection state within the scope of the second access network device.
  • the terminal sends a connection recovery request message to the second access network device.
  • a terminal in a lightly connected state needs to perform a service, and therefore sends a connection recovery request message to the second access network device to perform traffic transmission after being converted into a connected state.
  • the terminal may not send the connection recovery request to the second access network device, but send a state transition indication to the second access network device, where the state transition indication is used to indicate that the terminal is light
  • the connected state is converted to a connected state.
  • the embodiment of the present invention does not limit the specific implementation manner of the state transition indication.
  • the second access network device sends the second indication information to the first access network device.
  • the second indication information may be used to indicate that the terminal is converted from the light connection state to the connection state.
  • Section 403 is a case where the first access network device receives the first indication information from the terminal.
  • Section 403 can be understood as the case where the terminal actively needs to switch from the light connection state to the connection state within the range of the first access network device.
  • the terminal sends the first indication information to the first access network device, where the first indication information is used to indicate that the terminal is converted from the light connection state to the connection state.
  • the terminal may not send the first indication information to the first access network device, but send a connection recovery request to the first access network device.
  • a terminal in a lightly connected state needs to perform a service, and therefore sends a connection recovery request message to the first access network device to perform traffic transmission after being converted into a connected state.
  • the 404 part and the 405 part are similar to the 302 part and the 303 part in FIG. 3 respectively, and the detailed descriptions of the 302 part and the 303 part can be referred to, and are not described herein.
  • the method shown in FIG. 4 may further include parts 406-408.
  • the method shown in FIG. 4 includes a 401 portion or a 402 portion, after the 405 portion is executed, the portions 406 to 408 are continuously executed.
  • the first access network device sends the context information of the terminal to the second access network device. Therefore, after receiving the context information of the terminal, the second access network device can convert the terminal from the light connection state to the connection state.
  • the first access network device may send a context transfer message to the second access network device, the context transfer message carrying context information of the terminal.
  • the second network access device sends a path switch request to the core network device. Therefore, after receiving the path switching request sent by the second access network device, the core network device can learn the range in which the terminal has moved to the second access network device.
  • the core network device sends third downlink data or third downlink signaling to the second access network device.
  • the embodiment of the invention further provides an information sending method, and an access network device, a terminal and a system based on the method.
  • the method is used in a communication system, the communication system includes a paging area, and the paging area includes at least an access network device, and the access network device is connected to the core network device, and the method includes: the terminal sending an indication to the access network device The information indicating that the terminal is switched from the light connection state to the connection state; the access network device sends a first configuration message to the terminal, where the first configuration message is used to convert the terminal from the light connection state to the connection state; The device sends a request message to the terminal, where the request message is used to request context information of the terminal; the terminal sends a response message to the access network device, where the response message carries the context information of the terminal.
  • the foregoing connection may be an activated connection or a deactivated connection.
  • the above connection may be an S1 connection to the terminal.
  • the access network device when the terminal needs to be switched from the light connection state to the connection state, the access network device obtains the context information of the terminal after transmitting the first configuration message to the terminal to convert the terminal from the light connection state to the connection state. Without saving the context information of the terminal in advance. It can be seen that the solution of the embodiment of the present invention can save the storage space of the access network device and reduce the memory cost of the access network device.
  • the solution provided by the embodiment of the present invention will be described below with reference to FIG.
  • the method shown in FIG. 5 can be used in a communication system including a paging area including at least a paging area
  • the access network device has a connection between the access network device and the core network device, and the method includes: 501 to 504.
  • the access network device in the method shown in FIG. 5 may be the first access network device.
  • the terminal sends a state transition indication to the access network device, where the state transition indication is used to indicate that the terminal is switched from the lightly connected state to the connected state.
  • the terminal may not send a state transition indication to the access network device, but send a connection recovery request to the access network device.
  • a terminal in a lightly connected state needs to perform a service, and therefore sends a connection recovery request message to the second access network device to perform traffic transmission after being converted into a connected state.
  • the access network device sends a first configuration message to the terminal, where the first configuration message is used to convert the terminal from the light connection state to the connection state.
  • the first configuration message may be a Radio Resource Control (RRC) RRC connection reconfiguration message.
  • RRC Radio Resource Control
  • the access network device may further receive a first configuration completion message from the terminal, where the first configuration completion message is used to indicate that the terminal has transitioned from the light connection state to the connected state.
  • the first configuration completion message may be an RRC connection reconfiguration complete message.
  • the terminal can access the access network device, so that the access network device can request the required information from the terminal.
  • the access network device sends a request message to the terminal, the request message being used to request context information of the terminal.
  • the context information of the terminal may be terminal capability information.
  • terminal capability information refer to the detailed description of part 301 in the method shown in FIG. 3, and details are not described herein.
  • the terminal sends a response message to the access network device, where the response message carries the context information of the terminal.
  • the access network device may further send a second configuration message to the terminal, where the second configuration message is used to configure the service capability for the terminal. Further, the access network device may further receive a second configuration completion message from the terminal, where the second configuration completion message is used to indicate that the terminal has configured the service capability.
  • the second configuration message may be an RRC connection reconfiguration message, and the second configuration completion message may be Reconfigure the completion message for the RRC connection.
  • the solution provided by the embodiment of the present invention is further described below based on the method shown in FIG. 5 with reference to FIG.
  • the same or similar content as the method shown in FIG. 5 can be referred to the detailed description in FIG. 5, and details are not described herein.
  • the access network device in the method shown in FIG. 6 may be the first access network device.
  • the 601 part and the 602 part are similar to the 501 part and the 502 part of FIG. 5 respectively, and the detailed description of the 501 part can be referred to, and no further description is made here.
  • the terminal sends a first configuration complete message to the access network device, where the first configuration complete message is used to indicate that the terminal has transitioned from the light connection state to the connected state.
  • Sections 604 and 605 are similar to sections 503 and 504 of FIG. 5, respectively, and reference may be made to the detailed descriptions of Sections 503 and 504, which are not described herein.
  • the access network device sends a second configuration message to the terminal, where the second configuration message is used to configure the service capability for the terminal.
  • the terminal sends a second configuration completion message to the access network device, where the second configuration completion message is used to indicate that the terminal has configured the service capability.
  • the access network device when the terminal needs to be switched from the light connection state to the connection state, the access network device obtains the context information of the terminal after transmitting the first configuration message to the terminal to convert the terminal from the light connection state to the connection state. Without saving the context information of the terminal in advance. It can be seen that the solution of the embodiment of the present invention can save the storage space of the access network device and reduce the memory cost of the access network device. Further, after acquiring the context information of the terminal, the access network device may send a second configuration message to the terminal to configure the service capability for the terminal, so that the terminal can obtain rich service services.
  • the solution provided by the embodiment of the present invention is mainly introduced from the perspective of interaction between different network elements.
  • the first access network device, the second access network device, the core network device, and the terminal include corresponding hardware structures and/or software modules for performing the respective functions.
  • the embodiments of the present invention can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the technical solutions of the embodiments of the present invention.
  • the embodiments of the present invention may perform functional unit division on the first access network device, the second access network device, the core network device, the terminal, and the like according to the foregoing method.
  • each functional unit may be divided according to each function, or may be Two or more functions are integrated in one processing unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. It should be noted that the division of the unit in the embodiment of the present invention is schematic, and is only a logical function division, and the actual implementation may have another division manner.
  • FIG. 7 shows a schematic block diagram of a first access network device provided in an embodiment of the present invention.
  • the first access network device 700 includes a processing unit 702 and a first communication unit 703.
  • the processing unit 702 is configured to perform control management on the action of the first access network device 700.
  • the processing unit 702 is configured to support the first access network device 700 to perform the processes 301 and 302 in FIG. 3, the process 4012 in FIG. 4013, 404, and 406, processes 502 and 503 in FIG. 5, processes 602, 604, and 606 in FIG. 6, and/or other processes for the techniques described herein.
  • the first communication unit 703 is configured to support communication between the first access network device 700 and other network elements (eg, the second access network device, the core network device, etc.).
  • the first access network device 700 can also include a second communication unit 704 for supporting communication between the first access network device 700 and the terminal.
  • the first access network device 700 may further include a storage unit 701 for storing program codes and data of the first access network device 700.
  • the processing unit 702 can be a processor or a controller, and can be, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), and an application-specific integrated circuit (Application-Specific). Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the first communication unit 703 may be a communication interface, where the communication interface is a collective name.
  • the communication interface may include multiple interfaces, for example, may include: an interface between the access network device and the access network device, An interface and/or other interface between the access network device and the core network device.
  • the second communication unit 704 can be a transceiver or a transceiver circuit or the like.
  • the storage unit 701 can be a memory.
  • FIG. 8 shows a type provided in an embodiment of the present invention.
  • the second access network device 800 includes a processing unit 802, a first communication unit 803, and a second communication unit 804.
  • the processing unit 802 is configured to perform control management on the action of the second access network device 800.
  • the processing unit 802 is configured to support the second access network device 800 to perform the processes 4014, 4016, 4022, and 407 in FIG. 4, and/or Or other processes for the techniques described herein.
  • the first communication unit 803 is configured to support communication between the second access network device 800 and other access network devices or core network devices.
  • the second communication unit 804 is configured to support communication between the second access network device 800 and the terminal.
  • the second access network device 800 may further include a storage unit 801 for storing program codes and data of the second access network device 800.
  • the processing unit 802 can be a processor or a controller, such as a CPU, a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the first communication unit 803 may be a communication interface, where the communication interface is a collective name.
  • the communication interface may include multiple interfaces, for example, may include: an interface between the access network device and the access network device, An interface and/or other interface between the access network device and the core network device.
  • the second communication unit 804 can be a transceiver or a transceiver circuit or the like.
  • the storage unit 801 can be a memory.
  • the first access network device When the processing unit 702 is a processor, the first communication unit 703 is a communication interface, the second communication unit 704 is a transmitter/receiver, and the storage unit 701 is a memory, the first access network device according to the embodiment of the present invention
  • the structure may be the structure of the access network device as shown in FIG.
  • the processing unit 802 is a processor, the first communication unit 803 is a communication interface, the second communication unit 804 is a transmitter/receiver, and the storage unit 801 is a memory
  • the second access network device according to the embodiment of the present invention is also It may be the structure of the access network device as shown in FIG.
  • FIG. 9 is a schematic diagram of a possible structure of an access network device according to an embodiment of the present invention.
  • Access network device 900 includes a processor 902 and a communication interface 904.
  • the processor 902 may also be a controller, and is represented as "controller/processor 902" in FIG.
  • the communication interface 904 is configured to support the access network device to communicate with other network elements (eg, other access network devices, core network devices, etc.).
  • the access network device 900 can also include a transmitter/receiver 901. Said The transmitter/receiver 901 is configured to support the transmission and reception of information between the access network device and the terminal in the above embodiment, and to support radio communication between the terminal and other terminals.
  • the processor 902 performs various functions for communicating with the terminal.
  • an uplink signal from the terminal is received via an antenna, demodulated by the receiver 901 (eg, demodulating the high frequency signal into a baseband signal), and further processed by the processor 902 to recover the terminal.
  • traffic data and signaling messages are processed by processor 902 and modulated by transmitter 901 (e.g., modulating a baseband signal into a high frequency signal) to produce a downlink signal that is transmitted to the terminal via an antenna.
  • transmitter 901 e.g., modulating a baseband signal into a high frequency signal
  • the processor 902 is further configured to perform a process involving the first access network device in the method shown in FIG. 3 to FIG. 6 and/or the present application.
  • the access network device 900 may further include a memory 903 for storing program codes and data of the access network device 900.
  • Figure 9 only shows a simplified design of the access network device 900.
  • the access network device 900 can include any number of transmitters, receivers, processors, controllers, memories, communication units, etc., and all access network devices that can implement embodiments of the present invention are in the present invention. Within the scope of protection of the embodiments.
  • FIG. 10 shows a possible schematic block diagram of the core network device involved in the embodiment of the present invention.
  • the core network device 1000 includes a processing unit 1002 and a communication unit 1003.
  • the processing unit 1002 is configured to control and manage the actions of the core network device.
  • the processing unit 1002 is configured to support the core network device to perform the process 303 in FIG. 3, the processes 4011, 405, and 408 in FIG. 4, and/or Other processes of the techniques described herein.
  • the communication unit 1003 is configured to support communication of the core network device with other network entities, such as access network devices.
  • the core network device may further include a storage unit 1001 for storing program codes and data of the core network device.
  • the processing unit 1002 may be a processor or a controller, such as a CPU, a general-purpose processor, a DSP, an ASIC, an FPGA, or other programmable logic device, and a transistor logic. Pieces, hardware components, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the communication unit 1303 may be a communication interface, a transceiver or a transceiver circuit, etc., wherein the communication interface is a collective name. In a specific implementation, the communication interface may include multiple interfaces, for example, may include: a core network device and an access network device. Interface and/or other interfaces.
  • the storage unit 1001 may be a memory.
  • the core network device involved in the embodiment of the present invention may be the core network device shown in FIG.
  • the core network device 1100 includes a processor 1102, a communication interface 1103, and a memory 1101.
  • the core network device 1100 may further include a bus 1104.
  • the communication interface 1103, the processor 1102, and the memory 1101 may be connected to each other through a bus 1104.
  • the bus 1104 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (abbreviated). EISA) bus and so on.
  • the bus 1104 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 11, but it does not mean that there is only one bus or one type of bus.
  • FIG. 12 shows a schematic block diagram of one possible terminal provided in an embodiment of the present invention.
  • the terminal 1200 includes a processing unit 1202 and a communication unit 1203.
  • the processing unit 1202 is configured to perform control management on the actions of the terminal 1200.
  • the processing unit 1202 is configured to support the terminal 1200 to perform the processes 4015, 4021, and 403 in FIG. 4, the processes 501 and 504 in FIG. 5, and the process in FIG. 601, 603, 605, and 607, and/or other processes for the techniques described herein.
  • the communication unit 1203 is for supporting communication between the terminal 1200 and other network elements (e.g., access network devices).
  • the terminal 1200 may further include a storage unit 1201 for storing program codes and data of the terminal 1200.
  • the processing unit 1202 may be a processor or a controller, such as a CPU, a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor can also be an implementation meter A combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the communication unit 1203 may be a transceiver, a transceiver circuit, a communication interface, or the like.
  • the storage unit 1201 may be a memory.
  • the terminal involved in the embodiment of the present invention may be the terminal shown in FIG.
  • FIG. 13 is a simplified schematic diagram showing one possible design structure of a terminal involved in an embodiment of the present invention.
  • the terminal 1300 includes a transmitter 1301, a receiver 1302, and a processor 1303.
  • the processor 1303 may also be a controller, and is represented as "controller/processor 1303" in FIG.
  • the terminal 1300 may further include a modem processor 1305.
  • the modem processor 1305 may include an encoder 1307, a modulator 1307, a decoder 1308, and a demodulator 1309.
  • the transmitter 1301 conditions (eg, analog transforms, filters, amplifies, upconverts, etc.) the output samples and generates an uplink signal that is transmitted via an antenna to the base station described in the above embodiments. .
  • the antenna receives the downlink signal transmitted by the base station in the above embodiment.
  • Receiver 1302 conditions (eg, filters, amplifies, downconverts, digitizes, etc.) the signals received from the antenna and provides input samples.
  • encoder 1307 receives the traffic data and signaling messages to be transmitted on the uplink and processes (e.g., formats, codes, and interleaves) the traffic data and signaling messages.
  • Modulator 1307 further processes (e.g., symbol maps and modulates) the encoded service data and signaling messages and provides output samples.
  • Demodulator 1309 processes (e.g., demodulates) the input samples and provides symbol estimates.
  • the decoder 1308 processes (e.g., deinterleaves and decodes) the symbol estimate and provides decoded data and signaling messages that are sent to the terminal 1300.
  • Encoder 1307, modulator 1307, demodulator 1309, and decoder 1308 may be implemented by a composite modem processor 1305. These units are processed according to the radio access technology employed by the radio access network (e.g., access technologies of LTE and other evolved systems). It should be noted that when the terminal 1300 does not include the modem processor 1305, the foregoing functions of the modem processor 1305 may also be completed by the processor 1303.
  • the processor 1303 controls and manages the actions of the terminal 1300 for performing the processing performed by the terminal 1300 in the embodiment of the present invention.
  • the processor 1303 is further configured to perform the processes related to the terminal in the method shown in FIG. 3 to FIG. 6 and/or other processes of the technical solutions described in the present application.
  • the terminal 1300 may further include a memory 1304 for storing program codes and data for the terminal 1300.
  • the steps of the method or algorithm described in connection with the disclosure of the embodiments of the present invention may be implemented in a hardware manner, or may be implemented by a processor executing software instructions.
  • the software instructions may be composed of corresponding software modules, which may be stored in a random access memory (RAM), a flash memory, a read only memory (ROM), an erasable programmable read only memory ( Erasable Programmable ROM (EPROM), electrically erasable programmable read only memory (EEPROM), registers, hard disk, removable hard disk, compact disk read only (CD-ROM) or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and the storage medium can be located in an ASIC.
  • the ASIC can be located in the first access network device, the core network device, the second access network device, or the terminal.
  • the processor and the storage medium may also exist as discrete components in the first access network device, the core network device, the second access network device, or the terminal.
  • the functions described in the embodiments of the present invention may be implemented in hardware, software, firmware, or any combination thereof.
  • the functions may be stored in a computer readable medium or transmitted as one or more instructions or code on a computer readable medium.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a general purpose or special purpose computer.

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Abstract

本发明实施例提供一种信息发送方法，和基于这个方法的第一接入网设备、核心网设备和终端。该方法用于通信系统中，通信系统包括第一接入网设备和核心网设备，第一接入网设备和核心网设备之间具有针对终端的连接，该方法包括：第一接入网设备确定需要获取终端的上下文信息；然后，第一接入网设备向核心网设备发送请求消息，请求消息用于请求终端的上下文信息；核心网设备向第一接入网设备发送响应消息，响应消息携带终端的上下文信息。本发明实施例中，第一接入网设备在确定需要获取终端的上下文信息时，可以向核心网设备请求终端的上下文信息，而无需事先保存该终端的上下文信息，因此，能够节省接入网设备的存储空间，降低接入网设备的内存成本。

Description

一种信息发送方法、设备和系统 技术领域
本发明涉及通信技术领域，尤其涉及一种信息发送方法、设备和系统。
背景技术
在无线通信系统中，终端可以通过无线接入网(Radio Access Network，RAN)接入到核心网(Core Network，CN)。例如，终端可以通过RAN中的某一接入网设备接入到CN中的核心网设备。终端接入到核心网后，接入网设备需要保存终端的上下文信息。然而，终端的上下文信息一般比较庞大，会占用接入网设备的很多存储空间；而且，一个接入网设备所支持的终端数量较多，这将造成接入网设备的内存成本非常高。
发明内容
本发明实施例描述了一种信息发送方法、设备和系统，以期缓解接入网设备内存成本高的问题。
一方面，本发明实施例提供一种信息发送方法，该方法用于通信系统中，该通信系统包括第一接入网设备和核心网设备，第一接入网设备与核心网设备之间具有针对终端的连接，该方法包括：第一接入网设备确定需要获取终端的上下文信息；然后，第一接入网设备向核心网设备发送请求消息，请求消息用于请求终端的上下文信息；核心网设备向第一接入网设备发送响应消息，响应消息携带终端的上下文信息。可选的，上述针对终端的连接可以是激活的连接，也可以是去激活的连接。
本发明实施例的方案中，第一接入网设备在确定需要获取终端的上下文信息时，可以向核心网设备请求终端的上下文信息，而无需事先保存该终端的上下文信息。因此，本发明实施例的方案能够节省接入网设备的存储空间，降低接入网设备的内存成本。
上述针对终端的连接可以是针对终端的S1连接。上述终端的上下文信息可以包括以下至少一项：终端能力信息、切换限制列表信息、安全信息或跟 踪激活信息。
在一个可能的设计中，上述方法可以用于另一种通信系统中，该通信系统包括寻呼区域，寻呼区域至少包括第一接入网设备，第一接入网设备与核心网设备之间具有连接。
在一个可能的设计中，第一接入网设备确定需要获取终端的上下文信息可以包括如下情形之一：
第一种情形：第一接入网设备从核心网设备接收第二下行数据或第二下行信令，第一接入网设备根据第二下行信令或第二下行信令确定需要获取终端的上下文信息。
第二种情形：第一接入网设备从终端接收寻呼响应，第一接入网设备根据该寻呼响应确定需要获取终端的上下文信息。
第三种情形：第一接入网设备从第二接入网设备接收第一指示信息，第一接入网设备根据第一指示信息确定需要获取终端的上下文信息。可选的，当本方面的方法可以用于上述通信系统时，该第二接入网设备可以属于上述寻呼区域。
在这种情形中，第一接入网设备从第二接入网设备接收第一指示信息之前，第一接入网设备还可以从核心网设备接收第一下行数据或第一下行信令，并向第二接入网设备发送寻呼消息，该寻呼消息用于寻呼该终端。
第四种情形：第一接入网设备从终端接收第二指示信息，第一接入网设备根据第二指示信息确定需要获取终端的上下文信息。
在一个可能的设计中，第一接入网设备向核心网设备发送的请求消息可以是能力查询消息、连接激活消息、连接恢复消息、上下文请求消息、终端信息请求消息或能力匹配消息。对应的，核心网设备向第一接入网设备发送的响应消息可以是上述能力查询消息、连接激活消息、连接恢复消息、上下文请求消息、终端信息请求消息或能力匹配消息的响应消息，例如该响应消息为能力查询响应消息、连接恢复响应消息或上下文请求响应消息等。
在一个可能的设计中，第一接入网设备从核心网设备接收响应消息之后，还可以向上述第二接入网设备发送终端的上下文信息。例如，第一接入网设备可以向第二接入网设备发送上下文传递消息，上下文传递消息携带终端的上下文信息。
另一方面，本发明实施例提供一种另一种信息发送方法，该方法用于通信系统中，该通信系统包括寻呼区域，寻呼区域至少包括接入网设备，接入网设备与核心网设备具有连接，该方法包括：接入网设备从终端接收指示信息，指示信息用于指示将终端从轻连接态转换为连接态；然后，接入网设备向终端发送第一配置消息，第一配置消息用于将终端从轻连接态转换为连接态；接入网设备向终端发送请求消息，请求消息用于请求终端的上下文信息；终端向接入网设备发送响应消息，响应消息携带终端的上下文信息。可选的，上述连接可以是激活的连接，也可以是去激活的连接。
本发明实施例中，当终端需要从轻连接态转换为连接态时，接入网设备在向终端发送第一配置消息以将终端从轻连接态转换为连接态后，从终端获取终端的上下文信息，而无需事先保存终端的上下文信息。因此，本发明实施例的方案能够节省接入网设备的存储空间，降低接入网设备的内存成本。
其中，上述连接可以是针对终端的S1连接。上述终端的上下文信息可以包括终端能力信息。本方面所涉及的接入网设备可以是第一接入网设备。
在一个可能的设计中，接入网设备向终端发送第一配置消息后，还可已从终端接收第一配置完成消息，第一配置完成消息用于指示终端已从轻连接态转换为连接态。
在一个可能的设计中，接入网设备还可以向终端发送第二配置消息，第二配置消息用于为终端配置业务能力。进一步的，接入网设备还可以从终端接收第二配置完成消息，第二配置完成消息用于指示终端已配置业务能力。因此，本发明实施例的方案可以在获取终端的上下文信息后，向终端发送第二配置消息，来为终端配置业务能力，从而使终端能够获得丰富的业务服务。
又一方面，本发明实施例提供一种第一接入网设备，该第一接入网设备具有实现上述方法设计中第一接入网设备行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
在一个可能的设计中，第一接入网设备包括处理器，所述处理器被配置为支持第一接入网设备执行上述方法中相应的功能。进一步的，第一接入网设备还可以包括通信接口，所述通信接口用于支持第一接入网设备与第二接入网设备或核心网设备的通信。进一步的，第一接入网设备还可以包括存储 器，所述存储器用于与处理器耦合，其保存第一接入网设备必要的程序指令和数据。
又一方面，本发明实施例提供一种第二接入网设备，该第二接入网设备具有实现上述方法设计中第二接入网设备行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
在一个可能的设计中，第二接入网设备包括处理器，所述处理器被配置为支持第二接入网设备执行上述方法中相应的功能。进一步的，第二接入网设备还可以包括通信接口、发射器和接收器，所述通信接口用于支持第二接入网设备与第一接入网或核心网设备的通信，所述发射器和接收器用于支持第二接入网设备与终端之间的通信。进一步的，第二接入网设备还可以包括存储器，所述存储器用于与处理器耦合，其保存第二接入网设备必要的程序指令和数据。
又一方面，本发明实施例提供一种核心网设备，该核心网设备具有实现上述方法设计中核心网设备行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
在一个可能的设计中，核心网设备包括处理器，所述处理器被配置为支持核心网设备执行上述方法中相应的功能。进一步的，核心网设备还可以包括通信接口，所述通信接口用于支持核心网设备与第一接入网设备或第二接入网设备之间的通信。进一步的，核心网设备还可以包括存储器，所述存储器用于与处理器耦合，其保存核心网设备必要的程序指令和数据。
又一方面，本发明实施例提供一种终端，该终端具有实现上述方法设计中终端行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
在一个可能的设计中，终端包括处理器，所述处理器被配置为支持终端执行上述方法中相应的功能。进一步地，终端还可以包括发射器和接收器，所述发射器和接收器用于支持终端与接入网设备之间的通信。进一步的，终端还可以包括存储器，所述存储器用于与处理器耦合，其保存终端必要的程序指令和数据。
又一方面，本发明实施例提供一种通信系统，该系统包括上述方面所述的第一接入网设备和第二接入网设备；或者，该系统包括上述方面所述的第一接入网设备、第二接入网设备以及核心网设备。
再一方面，本发明实施例提供一种计算机存储介质，用于储存为上述用于第一接入网设备所用的计算机软件指令，其包含用于执行上述方面所设计的程序。
再一方面，本发明实施例提供一种计算机存储介质，用于储存为上述用于第二接入网设备所用的计算机软件指令，其包含用于执行上述方面所设计的程序。
再一方面，本发明实施例提供一种计算机存储介质，用于储存为上述用于核心网设备所用的计算机软件指令，其包含用于执行上述方面所设计的程序。
再一方面，本发明实施例提供一种计算机存储介质，用于储存为上述用于终端所用的计算机软件指令，其包含用于执行上述方面所设计的程序。
相较于现有技术，本发明实施例的方案中，第一接入网设备在接收到核心网设备发送的终端的信令后，向第二接入网设备发送第一寻呼消息，当接收到第二接入网设备发送的第一指示消息时，能够获知终端已接入第二接入网设备，从而进行合理的后续处理。
相较于现有技术，本发明实施例的方案中，第一接入网设备在确定需要获取终端的上下文信息时，可以向核心网设备请求终端的上下文信息，而无需事先保存该终端的上下文信息。因此，本发明实施例的方案能够节省接入网设备的存储空间，降低接入网设备的内存成本。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来说，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的一种可能的应用场景的示意图；
图2A为本发明实施例提供的一种可能的网络架构的示意图；
图2B为本发明实施例提供的另一种可能的网络架构的示意图；
图2C为现有方案的一种可能的示意图；
图3为本发明实施例提供的一种信息发送方法的通信示意图；
图4为本发明实施例提供的另一种信息发送方法的通信示意图；
图5为本发明实施例提供的又一种信息发送方法的通信示意图；
图6为本发明实施例提供的再一种信息发送方法的通信示意图；
图7为本发明实施例提供的一种第一接入网设备的示意性框图；
图8为本发明实施例提供的一种第二接入网设备的示意性框图；
图9为本发明实施例提供的一种接入网设备的结构示意图；
图10为本发明实施例提供的一种核心网设备的示意性框图；
图11为本发明实施例提供的一种核心网设备的结构示意图；
图12为本发明实施例提供的一种终端的示意性框图；
图13为本发明实施例提供的一种终端的结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行描述。
本发明实施例描述的网络架构以及业务场景是为了更加清楚的说明本发明实施例的技术方案，并不构成对于本发明实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本发明实施例提供的技术方案对于类似的技术问题，同样适用。
下面首先结合图1、图2A和图2B对本发明实施例适用的一些可能的应用场景及网络架构进行介绍。
图1示出了本发明实施例可能适用的一种应用场景。如图1所示，终端通过无线接入网及核心网接入运营商互联网协议(Internet Protocol，IP)业务网络，例如多媒体子系统(IP Multimedia System，IMS)网络、包交换流业务(Packet Switched Streaming Service，简PSS)网络等。本发明描述的技术方案可以适用于长期演进(Long Term Evolution，LTE)系统，或其他采用各种无线接入技术的无线通信系统，例如采用码分多址(Code Division Multiple Access，CDMA)、频分多址(Frequency Division Multiple Access，FDMA)、 时分多址(Time Division Multiple Access，TDMA)、正交频分多址(Orthogonal Frequency Division Multiple Access，OFDMA)、单载波频分多址(Single Carrier Frequency Division Multiple Access，SC-FDMA)等接入技术的系统。此外，还可以适用于LTE系统后续的演进系统，如第五代(5th Generation，5G)系统等。为清楚起见，这里仅以LTE系统为例进行说明。在LTE系统中，演进的通用陆地无线接入网(Evolved Universal Terrestrial Radio Access Network，E-UTRAN)作为无线接入网，演进分组核心网(Evolved Packet Core，EPC)作为核心网。终端通过E-UTRAN及EPC接入IMS网络。需要说明的是，当本发明实施例的方案应用于5G系统或未来可能出现的其他系统时，基站、终端的名称可能发生变化，但这并不影响本发明实施例方案的实施。
基于上述应用场景，图2A示出了本发明实施例提供的一种可能的网络架构。如图2A所示，该网络架构包括：核心网设备、接入网设备和终端。例如，终端201可以通过接入网设备101接入到核心网设备，其中，核心网设备与接入网设备101相连，接入网设备101与终端201之间可以进行无线通信。
基于上述应用场景，图2B示出了本发明实施例提供的另一种可能的网络架构。如图2B所示，该网络架构包括：核心网设备、终端和多个接入网设备。接入网设备101和接入网设备102处于同一寻呼区域，例如第一寻呼区；接入网设备103处于另一寻呼区域，例如第二寻呼区。其中，接入网设备101可以称为第一寻呼区的锚点接入网设备。锚点接入网设备是指保存终端的上下文信息并且保持该终端与核心网设备之间的连接的接入网设备，其与核心网设备相连，且与第一寻呼区中的其它接入网设备相连。图2B中，终端201处于轻连接态。终端处于轻连接状态是指：终端与核心网设备之间的接口保持在锚点接入网设备，且终端在一定区域内移动不用通知锚点接入网设备，当移动出该一定区域才通知锚点接入网设备。例如，终端201可以通过第一寻呼区中的接入网设备保持终端201与核心网设备之间的接口，且终端201在第一寻呼区中移动时不用通知接入网设备101，当终端201移动出该第一寻呼区时，才通知接入网设备101。
本发明实施例所涉及的轻连接态可以是无线资源控制(Radio Resource Control，RRC)连接态的子状态，也可以是空闲(idle)态的增强状态，还可 以是独立的状态。上述轻连接态也可以有其他名称，例如，轻连接态也可以称为非激活态、去激活态、低活动态或低开销态等。本发明实施例对轻连接态的名称或形态不作限定。
图2B所示网络架构所涉及的寻呼区域可以是一种小区集合的名称，该小区集合由接入网设备管理。当终端在该小区集合中移动时，不需要通知对该终端进行寻呼区域配置的接入网设备；当终端移动出该小区集合时，需要通知该接入网设备。该小区集合中的接入网设备在需要与终端进行通信时，需要在该小区集合所包括的所有小区内对该终端内进行寻呼。需要说明的是，上述寻呼区域还可以称为终端的注册区域、终端的轻连接区域、终端的管理区域、终端的接入网注册区域、终端的跟踪区域或终端的接入网跟踪区域等，本发明实施例并不限定。
本发明实施例中，名词“网络”和“系统”经常交替使用，但本领域技术人员可以理解其含义。本发明实施例所涉及到的终端可以包括各种具有无限通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其他处理设备，以及各种形式的用户设备(User Equipment，UE)，移动台(Mobile Station，MS)，终端设备(terminal device)等等。为方便描述，上面提到的设备统称为终端。本发明实施例所涉及到的接入网设备是一种部署在无线接入网中用以为终端提供无线通信功能的装置。例如，接入网设备可以是基站(Base Station，BS)，所述基站可以包括各种形式的宏基站，微基站，中继站，接入点等等。在采用不同的无线接入技术的系统中，具备基站功能的设备的名称可能会有所不同，例如在长期演进(Long Term Evolution，LTE)系统中，称为演进的节点B(evolved NodeB，eNB或eNodeB)，在第三代(3rd Generation，3G)通信系统中，称为节点B(Node B)等等。为方便描述，本发明实施例中，上述为终端提供无线通信功能的装置统称为接入网设备。本发明实施例所涉及到的核心网设备在不同的系统中可以包括不同的设备。例如，在LTE系统中核心网设备可以包括移动性管理实体(Mobility Management Entity，MME)或服务网关(Serving Gateway，SGW)，在3G通信系统中可以包括核心网设备可以包括服务GPRS支撑节点(Serving GPRS Support Node，SGSN)或网关GPRS支撑节点(Gateway GPRS support Node，GGSN)。其中，GPRS是通用分组无线系统(General Packet Radio  System)的缩写。本发明实施例所涉及到的核心网设备还可以包括5G系统或未来可能出现的其他系统中的核心网设备。
下面将基于上面所述的本发明实施例涉及的共性方面，对本发明实施例进一步详细说明。
现有方案中，终端接入到核心网后，接入网设备需要保存终端的上下文信息。例如，终端处于连接态时，接入网设备需要保存终端的上下文信息。又例如，当终端进入轻连接态时，锚点接入网设备需要保存终端的上下文信息。待终端被唤醒时，若终端已经移动到其他接入网设备的范围，锚点接入网设备还需要将终端的上下文信息搬迁到其他接入网设备。上述终端被唤醒是指终端从轻连接态转换为连接态。
下面结合图2C，对上述现有方案作举例介绍。如图2C所示，当终端处于连接态时，终端与接入网设备之间具备无线承载，接入网设备与核心网设备之间具备S1承载，且接入网设备中保存有终端的上下文信息。当终端处于轻连接态时，接入网设备与核心网设备之间具备S1承载，且接入网设备中保存有终端的上下文信息。可以理解的是，对于一个终端而言，接入网设备与核心网设备之间具有S1承载意味着接入网设备与核心网设备之间具有针对该终端的连接。
然而，终端的上下文信息一般比较庞大，会占用接入网设备的很多存储空间；而且，一个接入网设备所支持的终端数量较多，这将造成接入网设备的内存成本非常高。
有鉴于此，本发明实施例提供一种信息发送方法，和基于这个方法的接入网设备、核心网设备、终端和系统。该方法用于通信系统中，该通信系统包括第一接入网设备和核心网设备，第一接入网设备与核心网设备之间具有针对终端的连接，该方法包括：第一接入网设备确定需要获取终端的上下文信息；第一接入网设备向核心网设备发送请求消息，该请求消息用于请求终端的上下文信息；核心网设备向第一接入网设备发送响应消息，该响应消息携带该终端的上下文信息。可选的，上述针对终端的连接可以是激活的连接，也可以是去激活的连接。作为示例，上述针对终端的连接可以是针对终端的S1连接。本发明实施例中，第一接入网设备在确定需要获取终端的上下文信息时，可以向核心网设备请求终端的上下文信息，而无需事先保存该终端的 上下文信息。由上可见，本发明实施例的方案能够节省接入网设备的存储空间，降低接入网设备的内存成本。
下面结合附图3，对本发明实施例提供的方案进行说明。
在301部分，第一接入网设备确定需要获取终端的上下文信息。
在一个示例中，第一接入网设备确定需要获取终端的上下文信息可以包括如下情形之一：
第一种情形：第一接入网设备从核心网设备接收第二下行数据或第二下行信令，第一接入网设备根据第二下行信令或第二下行信令确定需要获取终端的上下文信息。例如，第一接入网设备在接收第二下行数据或第二下行信令后，获知该第二下行数据或第二下行信令是发送给该终端的，但第一接入网设备本地没有保存该终端的上下文信息，因此确定需要获取该终端的上下文信息，以向终端发送第二下行数据或第二下行信令。
第二种情形：第一接入网设备从终端接收寻呼响应，第一接入网设备根据该寻呼响应确定需要获取终端的上下文信息。例如，第一接入网设备在接收终端的寻呼响应后，发现本地没有保存该终端的上下文信息，因此确定需要获取该终端的上下文信息，以保证第一接入网设备后续与该终端之间的通信。
第三种情形：第一接入网设备从第二接入网设备接收第一指示信息，第一接入网设备根据第一指示信息确定需要获取终端的上下文信息。例如，第一接入网设备从第二接入网设备接收第一指示信息后，获知第二接入网设备需要终端的上下文信息，而第一接入网设备本地并没有保存终端的上下文信息，因此确定需要获取终端的上下文信息，以将该终端的上下文信息发送给第二接入网设备。
在这种情形中，第一接入网设备从第二接入网设备接收第一指示信息之前，第一接入网设备还可以从核心网设备接收第一下行数据或第一下行信令，并向第二接入网设备发送寻呼消息，该寻呼消息用于寻呼该终端。
第四种情形：第一接入网设备从终端接收第二指示信息，第一接入网设备根据第二指示信息确定需要获取终端的上下文信息。例如，第一接入网设备从终端接收第二指示信息后，获知终端需要从轻连接态转换为连接态，而第一接入网设备本地并没有保存该终端的上下文信息，因此确定需要获取终 端的上下文信息，以利用该终端的上下文信息将终端从轻连接态转换为连接态。
在一个示例中，终端的上下文信息可以包括以下至少一项：终端能力信息、切换限制列表信息、安全信息或跟踪激活信息。下面分别对终端能力信息、切换限制列表信息、安全信息或跟踪激活信息做简单介绍。
终端能力信息可以包括以下至少一项：终端能力等级(例如UE-Category)、终端的接入层协议信息(例如accessStratumRelease信息)、终端所支持的频段信息(例如supportedBandlistEUTRA信息)、终端所支持的载波聚合(Carrier Aggregation，CA)或双连接(Dual Connectivity，DC)的能力(例如supportedBandCombination/dc-Support-r12)或终端的异频异系统测量能力(例如interFreqNeedForGaps and interRAT-NeedForGaps)。
切换限制列表信息是指：约束接入层设备为终端选择服务或终端移动到目标的无线接入技术或无线接入层实例的参考信息。切换限制列表信息可以包括：禁止切换的共用陆地移动网(Public Land Mobile Network，PLMN)或无线接入技术(Radio Access Technology，RAT)的限制类信息。
安全信息是指：终端可以使用的安全类算法和用于下发密钥等安全类活动的信息等。例如，安全信息可以包括：终端安全能力(例如UE security capabilities)或安全密钥(security key)。
跟踪激活信息可以包括跟踪码、最小化路测(Minimization of Drive Tests，MDT)配置信息等。
在302部分，第一接入网设备向核心网设备发送请求消息，该请求消息用于请求终端的上下文信息。
在一个示例中，该请求消息可以是能力查询(例如UE capability enquiry)消息、连接激活消息、连接恢复消息、上下文请求消息、终端信息请求消息(例如UE information request)或能力匹配消息(例如UE radio capability match request)。
在303部分，核心网设备向第一接入网设备发送响应消息，该响应消息携带终端的上下文信息。
在一个示例中，该响应消息可以是上述能力查询消息、连接激活消息、连接恢复消息、上下文请求消息、终端信息请求消息或能力匹配消息的响应 消息。例如，该响应消息为能力查询响应、连接恢复响应消息或上下文请求响应消息等。
在一个示例中，第一接入网设备从核心网设备接收响应消息之后，还可以向上述第二接入网设备发送终端的上下文信息。例如，第一接入网设备可以向第二接入网设备发送上下文传递消息，上下文传递消息携带终端的上下文信息。
上述图3所示的方法可以应用于图2A或图2B所示的网络架构。例如，当图3所示的方法应用于图2B所示的网络架构时，该方法可以用于另一种通信系统中，该通信系统包括寻呼区域，寻呼区域至少包括第一接入网设备，第一接入网设备与核心网设备之间具有连接。在这种情况下，上述第二接入网设备可以属于该寻呼区域。
下面结合附图4，在图3所示方法的基础上，对本发明实施例提供的方案做进一步说明。图4所示方法中，与图3所示方法相同或相似的内容可以参考图3中的详细描述，此处不作赘述。
需要说明的是，图4所示的方法可以应用于图2B所示的网络架构。图4所示的方法中，以第一接入网设备从第二接入网设备接收第一指示信息，或第一接入网设备从终端接收第二指示信息为例，对第一接入网设备确定需要获取终端的上下文信息这一过程进行说明。其中，401～403部分分别为第一接入网设备接收第一指示信息或第二指示信息的三种不同情况，为可选的部分。实施图4所示的方法时，执行401～403部分中的任意一种情况即可，即执行401部分、402部分或403部分后，接着执行404部分。
401部分为第一接入网设备从第二接入网设备接收第一指示信息的一种情况，具体可以包括4011～4016部分。401部分可以理解为第一下行数据或第一下行信令触发终端需要从轻连接态转换为连接态的情况。
在4011部分，核心网设备向第一接入网设备发送第一下行数据或第一下行信令。
在4012部分，第一接入网设备向终端发送第一寻呼消息。
在4013部分，第一接入网设备向第二接入网设备发送第二寻呼消息，第二寻呼消息用于寻呼终端。
在4014部分，第二接入网设备向终端发送第三寻呼消息。
在4015部分，终端向第二接入网设备发送寻呼响应。
由4015部分可以看到，当终端分别接收第一接入网设备发送的第一寻呼消息和第二接入网设备发送的第三寻呼消息时，终端并没有向第一接入网设备发送寻呼响应，由此可知，终端已移动出第一接入网设备的范围。
在4016部分，第二接入网设备向第一接入网设备发送第二指示信息。其中，第二指示信息可以用于指示将终端从轻连接态转换为连接态。
402部分为第一接入网设备从第二接入网设备接收第二指示信息的另一种情况，具体可以包括4021部分、4022部分。402部分可以理解为终端在第二接入网设备的范围内主动需要从轻连接态转换为连接态的情况。
在4021部分，终端向第二接入网设备发送连接恢复请求消息。例如，处于轻连接态的终端需要进行业务，因此向第二接入网设备发送连接恢复请求消息，以在转换为连接态之后进行业务传输。
可选的，在4021部分，终端也可以不向第二接入网设备发送连接恢复请求，而是向第二接入网设备发送一个状态转换指示，该状态转换指示用于指示将终端从轻连接态转换为连接态。其中，本发明实施例不限定状态转换指示的具体实施方式。
在4022部分，第二接入网设备向第一接入网设备发送该第二指示信息。其中，第二指示信息可以用于指示将终端从轻连接态转换为连接态。
403部分为第一接入网设备从终端接收第一指示信息的情况。403部分可以理解为终端在第一接入网设备的范围内主动需要从轻连接态转换为连接态的情况。
在403部分，终端向第一接入网设备发送第一指示信息，第一指示信息用于指示将终端从轻连接态转换为连接态。
可选的，在403部分，终端也可以不向第一接入网设备发送第一指示信息，而是向第一接入网设备发送连接恢复请求。例如，处于轻连接态的终端需要进行业务，因此向第一接入网设备发送连接恢复请求消息，以在转换为连接态之后进行业务传输。
404部分和405部分分别与图3中的302部分和303部分相似，可以参考302部分和303部分的详细描述，此处不作赘述。
可选的，图4所示的方法还可以包括406～408部分。例如，在图4所示方法包括401部分或402部分的情况下，执行完405部分后，继续执行406～408部分。
在406部分，第一接入网设备向第二接入网设备发送终端的上下文信息。从而，第二接入网设备在接收该终端的上下文信息后，可以将终端从轻连接态转换为连接态。
其中，有关终端的上下文信息的介绍可以参考图3的302部分中的详细描述，此处不作赘述。
在一个示例中，第一接入网设备可以向第二接入网设备发送上下文传递消息，上下文传递消息携带终端的上下文信息。
在407部分，第二入网设备向核心网设备发送路径切换请求。从而，核心网设备在接收到第二接入网设备发送的路径切换请求后，能够获知终端已移动到第二接入网设备的范围。
在408部分，核心网设备向第二接入网设备发送第三下行数据或第三下行信令。
本发明实施例还提供一种信息发送方法，和基于这个方法的接入网设备、终端和系统。该方法用于通信系统中，该通信系统包括寻呼区域，寻呼区域内至少包括接入网设备，接入网设备与核心网设备具备连接，该方法包括：终端向接入网设备发送指示信息，指示信息用于指示将终端从轻连接态转换为连接态；接入网设备向终端发送第一配置消息，第一配置消息用于将终端从轻连接态转换为连接态；接入网设备向终端发送请求消息，请求消息用于请求终端的上下文信息；终端向接入网设备发送响应消息，响应消息携带终端的上下文信息。可选的，上述连接可以是激活的连接，也可以是去激活的连接。作为示例，上述连接可以是针对终端的S1连接。本发明实施例中，当终端需要从轻连接态转换为连接态时，接入网设备在向终端发送第一配置消息以将终端从轻连接态转换连接态后，从终端获取终端的上下文信息，而无需事先保存终端的上下文信息。由上可见，本发明实施例的方案能够节省接入网设备的存储空间，降低接入网设备的内存成本。
下面结合附图5，对本发明实施例提供的方案进行说明。图5所示的方法可以用于通信系统中，该通信系统包括寻呼区域，寻呼区内至少包括 接入网设备，接入网设备与核心网设备之间具有连接，该方法包括：501～504部分。其中，图5所示方法中的接入网设备可以是第一接入网设备。
在501部分，终端向接入网设备发送状态转换指示，状态转换指示用于指示将终端从轻连接态转换为连接态。
可选的，终端也可以不向接入网设备发送状态转换指示，而是向接入网设备发送连接恢复请求。例如，处于轻连接态的终端需要进行业务，因此向第二接入网设备发送连接恢复请求消息，以在转换为连接态之后进行业务传输。
在502部分，接入网设备向终端发送第一配置消息，第一配置消息用于将终端从轻连接态转换为连接态。
其中，上述第一配置消息可以为无线资源控制(Radio Resource Control，RRC)连接重配置(RRC connection reconfiguration)消息。
在一个示例中，接入网设备还可以从终端接收第一配置完成消息，第一配置完成消息用于指示终端已从轻连接态转换为连接态。其中，上述第一配置完成消息可以为RRC连接重配置完成(RRC connection reconfiguration complete)消息。
在执行502部分后，终端可以接入到接入网设备，从而接入网设备可以向终端请求需要的信息。
在503部分，接入网设备向终端发送请求消息，请求消息用于请求终端的上下文信息。
在一个示例中，终端的上下文信息可以为终端能力信息。其中，有关终端能力信息的介绍可以参考图3所示方法中301部分的详细描述，此处不作赘述。
在504部分，终端向接入网设备发送响应消息，响应消息携带终端的上下文信息。
在一个示例中，接入网设备还可以向终端发送第二配置消息，第二配置消息用于为终端配置业务能力。进一步地，接入网设备还可以从终端接收第二配置完成消息，第二配置完成消息用于指示终端已配置业务能力。其中，上述第二配置消息可以为RRC连接重配置消息，上述第二配置完成消息可以 为RRC连接重配置完成消息。
下面结合附图6，在图5所示方法的基础上，对本发明实施例提供的方案做进一步说明。图6所示方法中，与图5所示方法相同或相似的内容可以参考图5中的详细描述，此处不作赘述。其中，图6所示方法中的接入网设备可以是第一接入网设备。
601部分和602部分分别与图5的501部分和502部分相似，可以参考501部分的详细描述，此处不作赘述。
在603部分，终端向接入网设备发送第一配置完成消息，第一配置完成消息用于指示终端已从轻连接态转换为连接态。
604部分和605部分分别与图5的503部分和504相似，可以参考503部分和504部分的详细描述，此处不作赘述。
在606部分，接入网设备向终端发送第二配置消息，第二配置消息用于为终端配置业务能力。
在607部分，终端向接入网设备发送第二配置完成消息，第二配置完成消息用于指示终端已配置业务能力。
本发明实施例中，当终端需要从轻连接态转换为连接态时，接入网设备在向终端发送第一配置消息以将终端从轻连接态转换连接态后，从终端获取终端的上下文信息，而无需事先保存终端的上下文信息。由上可见，本发明实施例的方案能够节省接入网设备的存储空间，降低接入网设备的内存成本。进一步地，接入网设备在获取终端的上下文信息后，可以向终端发送第二配置消息，来为终端配置业务能力，从而使终端能够获得丰富的业务服务。
上述主要从不同网元之间交互的角度对本发明实施例提供的方案进行了介绍。可以理解的是，第一接入网设备、第二接入网设备、核心网设备、终端为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。结合本发明中所公开的实施例描述的各示例的单元及算法步骤，本发明实施例能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。本领域技术人员可以对每个特定的应用来使用不同的方法来实现所描述的功能，但是这种实现不应认为超出本发明实施例的技术方案的范围。
本发明实施例可以根据上述方法示例对第一接入网设备、第二接入网设备、核心网设备、终端等进行功能单元的划分，例如，可以对应各个功能划分各个功能单元，也可以将两个或两个以上的功能集成在一个处理单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。需要说明的是，本发明实施例中对单元的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
在采用集成的单元的情况下，图7示出了本发明实施例中提供的一种第一接入网设备的示意性框图。第一接入网设备700包括：处理单元702和第一通信单元703。处理单元702用于对第一接入网设备700的动作进行控制管理，例如，处理单元702用于支持第一接入网设备700执行图3中的过程301和302，图4中的过程4012、4013、404和406，图5中的过程502和503，图6中的过程602、604和606，和/或用于本文所描述的技术的其它过程。第一通信单元703用于支持第一接入网设备700和其他网元(例如第二接入网设备、核心网设备等)之间的通信。第一接入网设备700还可以包括第二通信单元704，用于支持第一接入网设备700与终端之间的通信。第一接入网设备700还可以包括存储单元701，用于存储第一接入网设备700的程序代码和数据。
其中，处理单元702可以是处理器或控制器，例如可以是中央处理器(Central Processing Unit，CPU)，通用处理器，数字信号处理器(Digital Signal Processor，DSP)，专用集成电路(Application-Specific Integrated Circuit，ASIC)，现场可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本发明公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。第一通信单元703可以是通信接口，其中，该通信接口是统称，在具体实现中，该通信接口可以包括多个接口，例如可以包括：接入网设备与接入网设备之间的接口、接入网设备与核心网设备之间的接口和/或其他接口。第二通信单元704可以是收发器或收发电路等。存储单元701可以是存储器。
在采用集成的单元的情况下，图8示出了本发明实施例中提供的一种 第二接入网设备的示意性框图。第二接入网设备800包括：处理单元802、第一通信单元803和第二通信单元804。处理单元802用于对第二接入网设备800的动作进行控制管理，例如，处理单元802用于支持第二接入网设备800执行图4中的过程4014、4016、4022和407，和/或用于本文所描述的技术的其它过程。第一通信单元803用于支持第二接入网设备800和其他接入网设备或核心网设备之间的通信。第二通信单元804用于支持第二接入网设备800与终端之间的通信。第二接入网设备800还可以包括存储单元801，用于存储第二接入网设备800的程序代码和数据。
其中，处理单元802可以是处理器或控制器，例如可以是CPU，通用处理器，DSP，ASIC，FPGA或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本发明公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。第一通信单元803可以是通信接口，其中，该通信接口是统称，在具体实现中，该通信接口可以包括多个接口，例如可以包括：接入网设备与接入网设备之间的接口、接入网设备与核心网设备之间的接口和/或其他接口。第二通信单元804可以是收发器或收发电路等。存储单元801可以是存储器。
当处理单元702为处理器，第一通信单元703为通信接口，第二通信单元704为发射器/接收器，存储单元701为存储器时，本发明实施例所涉及的第一接入网设备的结构可以是如图9所示的接入网设备的结构。当处理单元802为处理器，第一通信单元803为通信接口，第二通信单元804为发射器/接收器，存储单元801为存储器时，本发明实施例所涉及的第二接入网设备也可以是如图9所示的接入网设备的结构。
图9示出了本发明实施例提供的接入网设备的一种可能的结构示意图。
接入网设备900包括处理器902和通信接口904。其中，处理器902也可以为控制器，图9中表示为“控制器/处理器902”。通信接口904用于支持接入网设备与其他网元(例如其它接入网设备、核心网设备等)进行通信。进一步的，接入网设备900还可以包括发射器/接收器901。所述 发射器/接收器901用于支持接入网设备与上述实施例中的所述终端之间收发信息，以及支持所述终端与其他终端之间进行无线电通信。所述处理器902执行各种用于与终端通信的功能。在上行链路，来自所述终端的上行链路信号经由天线接收，由接收器901进行解调(例如将高频信号解调为基带信号)，并进一步由处理器902进行处理来恢复终端所发送到业务数据和信令信息。在下行链路上，业务数据和信令消息由处理器902进行处理，并由发射器901进行调制(例如将基带信号调制为高频信号)来产生下行链路信号，并经由天线发射给终端。需要说明的是，上述解调或调制的功能也可以由处理器902完成。
例如，当该接入网设备900为第一接入网设备时，处理器902还用于执行图3至图6所示方法中涉及第一接入网设备的处理过程和/或本申请所描述的技术方案的其他过程；或者，当该接入网设备900为第二接入网设备时，处理器902还用于执行图3和图4所示方法中涉及第二接入网设备的处理过程和/或本申请所描述的技术方案的其他过程。
进一步的，接入网设备900还可以包括存储器903，存储器903用于存储接入网设备900的程序代码和数据。
可以理解的是，图9仅仅示出了接入网设备900的简化设计。在实际应用中，接入网设备900可以包含任意数量的发射器，接收器，处理器，控制器，存储器，通信单元等，而所有可以实现本发明实施例的接入网设备都在本发明实施例的保护范围之内。
在采用集成的单元的情况下，图10示出了本发明实施例中所涉及的核心网设备的一种可能的示意性框图。核心网设备1000包括：处理单元1002和通信单元1003。处理单元1002用于对核心网设备的动作进行控制管理，例如，处理单元1002用于支持核心网设备执行图3中的过程303，图4中的过程4011、405和408，和/或用于本文所描述的技术的其它过程。通信单元1003用于支持核心网设备与其他网络实体(例如接入网设备)的通信。核心网设备还可以包括存储单元1001，用于存储核心网设备的程序代码和数据。
其中，处理单元1002可以是处理器或控制器，例如可以是CPU，通用处理器，DSP，ASIC，FPGA或者其他可编程逻辑器件、晶体管逻辑器 件、硬件部件或者其任意组合。其可以实现或执行结合本发明公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。通信单元1303可以是通信接口、收发器或收发电路等，其中，该通信接口是统称，在具体实现中，该通信接口可以包括多个接口，例如可以包括：核心网设备和接入网设备之间的接口和/或其他接口。存储单元1001可以是存储器。
当处理单元1002为处理器，通信单元1003为通信接口，存储单元1001为存储器时，本发明实施例所涉及的核心网设备可以为图11所示的核心网设备。
参阅图11所示，该核心网设备1100包括：处理器1102、通信接口1103、存储器1101。可选的，核心网设备1100还可以包括总线1104。其中，通信接口1103、处理器1102以及存储器1101可以通过总线1104相互连接；总线1104可以是外设部件互连标准(Peripheral Component Interconnect，简称PCI)总线或扩展工业标准结构(Extended Industry Standard Architecture，简称EISA)总线等。所述总线1104可以分为地址总线、数据总线、控制总线等。为便于表示，图11中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
在采用集成的单元的情况下，图12示出了本发明实施例中提供的一种可能的终端的示意性框图。终端1200包括：处理单元1202和通信单元1203。处理单元1202用于对终端1200的动作进行控制管理，例如，处理单元1202用于支持终端1200执行图4中的过程4015、4021和403，图5中的过程501和504，图6中的过程601、603、605和607，和/或用于本文所描述的技术的其它过程。通信单元1203用于支持终端1200和其他网元(例如接入网设备)之间的通信。终端1200还可以包括存储单元1201，用于存储终端1200的程序代码和数据。
其中，处理单元1202可以是处理器或控制器，例如可以是CPU，通用处理器，DSP，ASIC，FPGA或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本发明公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计 算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。通信单元1203可以是收发器、收发电路或通信接口等。存储单元1201可以是存储器。
当处理单元1202为处理器，通信单元1203为收发器，存储单元1201为存储器时，本发明实施例所涉及的终端可以为图13所示的终端。
图13示出了本发明实施例中所涉及的终端的一种可能的设计结构的简化示意图。所述终端1300包括发射器1301，接收器1302和处理器1303。其中，处理器1303也可以为控制器，图13中表示为“控制器/处理器1303”。可选的，所述终端1300还可以包括调制解调处理器1305，其中，调制解调处理器1305可以包括编码器1307、调制器1307、解码器1308和解调器1309。
在一个示例中，发射器1301调节(例如，模拟转换、滤波、放大和上变频等)该输出采样并生成上行链路信号，该上行链路信号经由天线发射给上述实施例中所述的基站。在下行链路上，天线接收上述实施例中基站发射的下行链路信号。接收器1302调节(例如，滤波、放大、下变频以及数字化等)从天线接收的信号并提供输入采样。在调制解调处理器1305中，编码器1307接收要在上行链路上发送的业务数据和信令消息，并对业务数据和信令消息进行处理(例如，格式化、编码和交织)。调制器1307进一步处理(例如，符号映射和调制)编码后的业务数据和信令消息并提供输出采样。解调器1309处理(例如，解调)该输入采样并提供符号估计。解码器1308处理(例如，解交织和解码)该符号估计并提供发送给终端1300的已解码的数据和信令消息。编码器1307、调制器1307、解调器1309和解码器1308可以由合成的调制解调处理器1305来实现。这些单元根据无线接入网采用的无线接入技术(例如，LTE及其他演进系统的接入技术)来进行处理。需要说明的是，当终端1300不包括调制解调处理器1305时，调制解调处理器1305的上述功能也可以由处理器1303完成。
处理器1303对终端1300的动作进行控制管理，用于执行上述本发明实施例中由终端1300进行的处理过程。例如，处理器1303还用于执行图3至图6所示方法中涉及终端的处理过程和/或本申请所描述的技术方案的其他过程。
进一步的，终端1300还可以包括存储器1304，存储器1304用于存储用于终端1300的程序代码和数据。
结合本发明实施例公开内容所描述的方法或者算法的步骤可以硬件的方式来实现，也可以是由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于随机存取存储器(Random Access Memory，RAM)、闪存、只读存储器(Read Only Memory，ROM)、可擦除可编程只读存储器(Erasable Programmable ROM，EPROM)、电可擦可编程只读存储器(Electrically EPROM，EEPROM)、寄存器、硬盘、移动硬盘、只读光盘(CD-ROM)或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于第一接入网设备、核心网设备、第二接入网设备或终端中。当然，处理器和存储介质也可以作为分立组件存在于第一接入网设备、核心网设备、第二接入网设备或终端中。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本发明实施例所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
以上所述的具体实施方式，对本发明实施例的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本发明实施例的具体实施方式而已，并不用于限定本发明实施例的保护范围，凡在本发明实施例的技术方案的基础之上，所做的任何修改、等同替换、改进等，均应包括在本发明实施例的保护范围之内。

Claims (17)

  1. 一种信息发送方法，用于通信系统中，所述通信系统包括第一接入网设备和核心网设备，所述第一接入网设备与所述核心网设备之间具有针对终端的连接，包括：
    所述第一接入网设备确定需要获取所述终端的上下文信息；
    所述第一接入网设备向所述核心网设备发送请求消息，所述请求消息用于请求所述终端的上下文信息；
    所述第一接入网设备从所述核心网设备接收响应消息，所述响应消息携带所述终端的上下文信息。
  2. 根据权利要求1所述的方法，其特征在于，所述第一接入网设备确定需要获取终端的上下文信息包括如下情形之一：
    所述第一接入网设备从所述核心网设备接收下行数据或下行信令，所述第一接入网设备根据所述下行数据或所述下行信令确定需要获取所述终端的上下文信息；
    所述第一接入网设备从所述终端接收寻呼响应，所述第一接入网设备根据所述寻呼响应确定需要获取所述终端的上下文信息；
    所述第一接入网设备从第二接入网设备接收第一指示信息，所述第一接入网设备根据所述第一指示信息确定需要获取所述终端的上下文信息；
    所述第一接入网设备从所述终端接收第二指示信息，所述第一接入网设备根据所述第二指示信息确定需要获取所述终端的上下文信息。
  3. 根据权利要求2所述的方法，其特征在于，还包括：
    所述第一接入网设备向所述第二接入网设备发送所述终端的上下文信息。
  4. 根据权利要求2或3所述的方法，其特征在于，所述第一接入网设备从第二接入网设备接收第一指示信息之前，还包括：
    所述第一接入网设备从所述核心网设备接收下行数据或下行信令；
    所述第一接入网设备向所述第二接入网设备发送寻呼消息，所述寻呼消息用于寻呼所述终端。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，所述终端的上下文信息包括以下至少一项：终端能力信息、切换限制列表信息、 安全信息或跟踪激活信息。
  6. 一种信息发送方法，用于通信系统中，所述通信系统包括接入网设备和核心网设备，所述接入网设备与所述核心网设备之间具有针对终端的连接，包括：
    所述核心网设备从所述接入网设备接收请求消息，所述请求消息用于请求所述终端的上下文信息；
    所述核心网设备向所述接入网设备发送响应消息，所述响应消息携带所述终端的上下文信息。
  7. 根据权利要求6所述的方法，其特征在于，所述核心网设备从接入网设备接收请求消息之前，还包括：
    所述核心网设备向所述接入网设备发送下行数据或下行信令。
  8. 根据权利要求6或7所述的方法，其特征在于，所述终端的上下文信息包括以下至少一项：终端能力信息、切换限制列表信息、安全信息或跟踪激活信息。
  9. 一种接入网设备，所述接入网设备为第一接入网设备，用于通信系统中，所述通信系统包括所述第一接入网设备和核心网设备，所述第一接入网设备与所述核心网设备之间具有针对终端的连接，所述第一接入网设备包括：处理单元和第一通信单元，
    所述处理单元用于确定需要获取所述终端的上下文信息；以及用于通过所述第一通信单元向所述核心网设备发送请求消息，所述请求消息用于请求所述终端的上下文信息；以及用于通过所述第一通信单元从所述核心网设备接收响应消息，所述响应消息携带所述终端的上下文信息。
  10. 根据权利要求9所述的接入网设备，其特征在于，所述处理单元用于确定需要获取终端的上下文信息包括如下情形之一：
    所述处理单元用于通过所述第一通信单元从所述核心网设备接收下行数据或下行信令，并根据所述下行数据或所述下行信令确定需要获取所述终端的上下文信息；
    所述接入网设备还包括第二通信单元，所述处理单元用于通过所述第二通信单元从所述终端接收寻呼响应，并根据所述寻呼响应确定需要获取所述终端的上下文信息；
    所述处理单元用于通过所述第一通信单元从第二接入网设备接收第一指示信息，并根据所述第一指示信息确定需要获取所述终端的上下文信息；
    所述接入网设备还包括第二通信单元，所述处理单元用于通过所述第二通信单元从所述终端接收第二指示信息，并根据所述第二指示信息确定需要获取所述终端的上下文信息。
  11. 根据权利要求10所述的接入网设备，其特征在于，所述处理单元还用于通过所述第一通信单元向所述第二接入网设备发送所述终端的上下文信息。
  12. 根据权利要求10或11所述的接入网设备，其特征在于，所述处理单元还用于通过所述第一通信单元从所述核心网设备接收下行数据或下行信令；以及用于通过所述第一通信单元向所述第二接入网设备发送寻呼消息，所述寻呼消息用于寻呼所述终端。
  13. 根据权利要求9至12中任一项所述的接入网设备，其特征在于，所述终端的上下文信息包括以下至少一项：终端能力信息、切换限制列表信息、安全信息或跟踪激活信息。
  14. 一种核心网设备，用于通信系统中，所述通信系统包括接入网设备和所述核心网设备，所述接入网设备与所述核心网设备之间具有针对终端的连接，所述核心网设备包括：处理单元和通信单元，
    所述处理单元用于通过所述通信单元从所述接入网设备接收请求消息，所述请求消息用于请求所述终端的上下文信息；以及用于通过所述通信单元向所述接入网设备发送响应消息，所述响应消息携带所述终端的上下文信息。
  15. 根据权利要求14所述的核心网设备，其特征在于，所述处理单元还用于通过所述通信单元向所述接入网设备发送下行数据或下行信令。
  16. 根据权利要求14或15所述的核心网设备，其特征在于，所述终端的上下文信息包括以下至少一项：终端能力信息、切换限制列表信息、安全信息或跟踪激活信息。
  17. 一种通信系统，其特征在于，包括如权利要求9至13中任一项所述的接入网设备和如权利要求14至16中任一项所述的核心网设备。
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