CN110798814B - Indirect communication method, relay node, network equipment and system - Google Patents

Indirect communication method, relay node, network equipment and system Download PDF

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CN110798814B
CN110798814B CN201910976011.6A CN201910976011A CN110798814B CN 110798814 B CN110798814 B CN 110798814B CN 201910976011 A CN201910976011 A CN 201910976011A CN 110798814 B CN110798814 B CN 110798814B
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message
relay node
terminal equipment
equipment
terminal
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CN110798814A (en
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李建
赵军
刁文波
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/18—Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The invention discloses an indirect communication method, a relay node, network equipment and a system, relates to the field of communication, and is used for solving the problem that terminal equipment cannot be identified by a network side due to the fact that the terminal equipment is accessed to the network by the identity of the relay node. The indirect communication method comprises the following steps: the relay node receives a terminal equipment message from the terminal equipment, encapsulates the terminal equipment message in the relay node message, indicates the encapsulated content in the relay node message as the terminal equipment message, and sends the relay node message to the network selection equipment; the network selection equipment receives the relay node message, determines a core network to which the terminal equipment belongs according to the terminal equipment identity information in the relay node message, and sends the terminal equipment message to first core network equipment corresponding to the core network to which the terminal equipment belongs; and the corresponding first core network equipment receives the terminal equipment message and carries out subsequent processing on the terminal equipment message. The embodiment of the invention is applied to the indirect communication of the Internet of things.

Description

Indirect communication method, relay node, network equipment and system
Technical Field
The present invention relates to the field of communications, and in particular, to an indirect communication method, a relay node, a network device, and a system.
Background
For a 5G M-IoT (hereinafter, referred to as a large internet of things) scene or a 4G NB-IoT (hereinafter, referred to as a narrow-band internet of things) scene, a terminal device (e.g., a terminal device) generally directly accesses a network for communication. For the situation that the network coverage is insufficient or in consideration of reducing the power consumption of the terminal device, the terminal device may need to access the network in an indirect manner to communicate through nearby other relay nodes (such as a mobile phone terminal or a gateway device) as relays. Specifically, when the terminal device is connected to the relay node through a short-distance connection mode, such as Bluetooth (BT), WiFi (wireless fidelity ), etc., the relay node performs application convergence, and then accesses the network with the identity of the relay node to communicate with the application server.
However, since the terminal device is accessed to the network with the identity of the relay node, the network side cannot identify the terminal device, and thus, the terminal device and the relay node cannot be managed differently, for example, the terminal device and the relay node cannot be supported to connect different servers.
Disclosure of Invention
Embodiments of the present invention provide an indirect communication method, a relay node, a network device, and a system, which are used to solve the problem that a network side cannot identify a terminal device because the terminal device accesses a network with the identity of the relay node.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in one aspect, an embodiment of the present invention provides an indirect communication method, where the method includes: the relay node receives a terminal equipment message from the terminal equipment, wherein the terminal equipment message comprises terminal equipment identity information; the relay node encapsulates the terminal equipment message in the relay node message, and indicates the encapsulated content in the relay node message as the terminal equipment message; the relay node sends the relay node message to the network selection equipment, the relay node message is used for determining a core network to which the terminal equipment belongs according to the terminal equipment identity information in the relay node message, the network selection equipment sends the terminal equipment message to first core network equipment corresponding to the core network to which the terminal equipment belongs, and the corresponding first core network equipment carries out subsequent processing on the terminal equipment message. The indirect communication method provided by the embodiment of the invention encapsulates the terminal equipment message in the relay node message after the relay node receives the terminal equipment message from the terminal equipment, indicates the encapsulated content in the relay node message as the terminal equipment message, then forwards the terminal equipment message to the network selection equipment, obtains the core network corresponding to the terminal equipment by the network selection equipment according to the terminal equipment identity information in the relay node message, then forwards the terminal equipment message to the corresponding first core network equipment, and carries out subsequent processing on the terminal equipment message by the first core network equipment, so that the network side can identify the identity information of the terminal equipment and carry out corresponding processing, further carries out differentiated management on the terminal equipment message and the signaling or data sent by the relay node per se, and solves the problem that the terminal equipment is accessed to the network by the identity of the relay node, so that the network side cannot identify the terminal equipment.
In one possible design, indicating that the encapsulated content is a terminal device message in the relay node message includes: and indicating the packaged content as the terminal equipment message in the relay node message through self-defined relay node signaling. The design provides a method of indicating packaged content.
In one possible design, indicating that the encapsulated content is a terminal device message in the relay node message includes: and indicating the encapsulation content as the terminal equipment message in the relay node message through a newly added information element in the existing relay node signaling. The design provides a method of indicating packaged content.
In one possible design, the network selection device selects network elements or core network devices for the individual networks. This design makes it possible for the network selection device of the invention to be applied to different network elements.
In a possible design, the relay node message further includes relay node identity information, the relay node identity information is used for adding the relay node identity information to the terminal device message by the network selection device to generate a new terminal device message and send the new terminal device message to the first core network device, and the first core network device stores the relay node identity information and the terminal device identity information in the new terminal device message in a local context for addressing the terminal device during downlink addressing, or stores the relay node identity information and the terminal device identity information in the node management module for managing the relay node and the location thereof by the node management module. The design enables the relay node identity information to be stored in the local context, and when downlink data is subjected to downlink addressing, the corresponding relay node can be found according to the relay node identity information.
In a possible design, the relay node message further includes access side information, where the access side information is used for adding the access side information to the terminal device message by the network selection device, the first core network device analyzes the terminal device message to obtain the access side information, and the first core network device stores the access side information in a local context for addressing the terminal device during downlink addressing, or stores the access side information in the node management module for managing the relay node and the location thereof by the node management module. The design enables the access side information to be stored in the local context, and when downlink data is subjected to downlink addressing, the corresponding relay node can be found according to the access side information.
In a possible design, the relay node message further includes a terminal device access identifier, the terminal device access identifier is used for adding the terminal device access identifier to the terminal device message by the network selection device, the terminal device access identifier is obtained by analyzing the terminal device message by the first core network device, and the terminal device access identifier is stored in a local context by the first core network device and used for addressing the terminal device during downlink addressing. The design enables the terminal equipment access identification to be stored in the local context, and when downlink data is subjected to downlink addressing, the corresponding terminal equipment can be found according to the terminal equipment access identification.
In one possible design, the relay node message is carried on a signaling plane or a data plane of the relay node. The design is suitable for large data packet transmission when the data plane is used for carrying.
In one possible design, the method further includes: the method comprises the steps that a relay node receives downlink relay node information, wherein the downlink relay node information is formed by packaging downlink terminal equipment information from first core network equipment according to relay node identity information in the downlink terminal equipment information, the downlink terminal equipment information is generated by the first core network equipment according to downlink data and a local context, the local context comprises the relay node identity information and a terminal equipment access identifier, and the downlink terminal equipment information comprises the downlink data, the relay node identity information and the terminal equipment access identifier; the relay node analyzes the downlink relay node message to obtain a downlink terminal equipment message and a terminal equipment access identifier, and finds out corresponding terminal equipment according to the terminal equipment access identifier; and the relay node sends the downlink terminal equipment message to the corresponding terminal equipment. The design realizes that the local context established in the uplink direction provides assistance for downlink data to address the relay node and the terminal equipment, thereby realizing downlink indirect communication.
In another aspect, an embodiment of the present invention provides an indirect communication method, where the method includes: the network selection equipment receives a relay node message from a relay node, wherein the relay node message encapsulates a terminal equipment message from terminal equipment, and indicates the encapsulated content as the terminal equipment message in the relay node message, wherein the terminal equipment message comprises terminal equipment identity information; the network selection equipment determines a core network to which the terminal equipment belongs according to the terminal equipment identity information in the relay node message; the network selection equipment sends the terminal equipment message to first core network equipment corresponding to a core network to which the terminal equipment belongs, and the corresponding first core network equipment carries out subsequent processing on the terminal equipment message. The indirect communication method provided by the embodiment of the invention encapsulates the terminal equipment message in the relay node message after the relay node receives the terminal equipment message from the terminal equipment, indicates the encapsulated content in the relay node message as the terminal equipment message, then forwards the terminal equipment message to the network selection equipment, obtains the core network corresponding to the terminal equipment by the network selection equipment according to the terminal equipment identity information in the relay node message, then forwards the terminal equipment message to the corresponding first core network equipment, and carries out subsequent processing on the terminal equipment message by the first core network equipment, so that the network side can identify the identity information of the terminal equipment and carry out corresponding processing, further carries out differentiated management on the terminal equipment message and the signaling or data sent by the relay node per se, and solves the problem that the terminal equipment is accessed to the network by the identity of the relay node, so that the network side cannot identify the terminal equipment.
In one possible design, the network selection device selects network elements or core network devices for the individual networks. This design makes it possible for the network selection device of the invention to be applied to different network elements.
In one possible design, the determining, by the network selection device, the core network to which the terminal device belongs according to the terminal device identity information in the relay node message includes: the network selection equipment judges according to the encapsulation content indicated by the relay node message, when the encapsulation content of the relay node message is the terminal equipment message, the network selection equipment unpacks the relay node message to obtain the terminal equipment message, the network selection equipment unpacks the terminal equipment message to obtain the terminal equipment identity information, and the network selection equipment judges the core network to which the terminal equipment belongs according to the terminal equipment identity information. The design enables the relay node to perform corresponding processing according to the encapsulation content in the relay node message, and when the encapsulation content is the terminal equipment message, the core network to which the terminal equipment belongs can be judged according to the terminal equipment identity information.
In one possible design, determining, by the network selection device, a core network to which the terminal device belongs according to the terminal device identity information includes: and the network selection equipment acquires the subscription information of the terminal equipment from the user database according to the identity information of the terminal equipment, and judges the core network to which the terminal equipment belongs according to the subscription information of the terminal equipment. The design provides a method for judging the core network to which the terminal equipment belongs according to the identity information of the terminal equipment.
In one possible design, the network selection device sends the terminal device message to a first core network device corresponding to a core network to which the terminal device belongs, and the corresponding first core network device performs subsequent processing on the terminal device message, including: if the network selection equipment is the core network equipment corresponding to the core network to which the terminal equipment belongs, the network selection equipment performs subsequent processing on the terminal equipment message, otherwise, the network selection equipment forwards the terminal equipment message to first core network equipment corresponding to the core network to which the terminal equipment belongs, and the first core network equipment performs subsequent processing on the terminal equipment message. The design enables the embodiment of the invention to carry out subsequent processing on the terminal equipment message according to the core network equipment corresponding to the core network to which the terminal equipment belongs.
In one possible design, the method further includes: the network selection equipment decapsulates the relay node message to obtain relay node identity information, adds the relay node identity information to the terminal equipment message by the network selection equipment to generate a new terminal equipment message and sends the new terminal equipment message to the first core network equipment, and the first core network equipment stores the relay node identity information and the terminal equipment identity information in the new terminal equipment message in a local context for addressing the terminal equipment during downlink addressing or stores the relay node identity information and the terminal equipment identity information in a node management module for managing the relay node and the position of the relay node by the node management module, wherein the relay node message comprises the relay node identity information. The design enables the relay node identity information to be stored in the local context, and when downlink data is subjected to downlink addressing, the corresponding relay node can be found according to the relay node identity information.
In one possible design, the method further includes: the network selection equipment decapsulates the relay node message to obtain access side information, the network selection equipment adds the access side information to the terminal equipment message and sends the access side information to the first core network equipment, and the first core network equipment stores the access side information in the terminal equipment message in a local context for addressing the terminal equipment during downlink addressing, or stores the access side information in a node management module for managing the relay node and the position of the relay node by the node management module. The design enables the access side information to be stored in the local context, and when downlink data is subjected to downlink addressing, the corresponding relay node can be found according to the access side information.
In one possible design, the method further includes: the network selection equipment de-encapsulates the relay node message to obtain a terminal equipment access identifier, the network selection equipment adds the terminal equipment access identifier to the terminal equipment message and sends the terminal equipment access identifier to the first core network equipment, and the first core network equipment stores the terminal equipment access identifier in the terminal equipment message in a local context for addressing the terminal equipment during downlink addressing. The design enables the terminal equipment access identification to be stored in the local context, and when downlink data is subjected to downlink addressing, the corresponding terminal equipment can be found according to the terminal equipment access identification.
In one possible design, the relay node message is carried on a signaling plane or a data plane of the relay node. The design is suitable for large data packet transmission when the data plane is used for carrying.
In one possible design, the method further includes: the network selection equipment receives downlink terminal equipment information, wherein the downlink terminal equipment information is generated by first core network equipment according to downlink data and a local context, the local context comprises relay node identity information and a terminal equipment access identifier, and the downlink terminal equipment information comprises the downlink data, the relay node identity information and the terminal equipment access identifier; the network selection equipment encapsulates the downlink terminal equipment message in the downlink relay node message according to the relay node identity information in the downlink terminal equipment message; the network selection equipment sends the downlink relay node message to the relay node, the downlink relay node message is used for analyzing the downlink relay node message by the relay node to obtain a downlink terminal equipment message and a terminal equipment access identifier, the relay node finds the corresponding terminal equipment according to the terminal equipment access identifier, and the relay node sends the downlink terminal equipment message to the corresponding terminal equipment. The design realizes that the local context established in the uplink direction provides assistance for downlink data to address the relay node and the terminal equipment, thereby realizing downlink indirect communication.
In another aspect, an embodiment of the present invention provides an indirect communication method, where the method includes: the method comprises the steps that a first core network device receives a terminal device message from a terminal device from a network selection device, wherein the first core network device is a core network device corresponding to a core network to which the terminal device belongs, the core network to which the terminal device belongs is determined for the network selection device according to terminal device identity information in a relay node message, the relay node message is formed by encapsulating the terminal device message by a relay node, encapsulation content is indicated to be the terminal device message in the relay node message, and the terminal device message comprises the terminal device identity information; and the first core network equipment carries out subsequent processing on the terminal equipment message. The indirect communication method provided by the embodiment of the invention encapsulates the terminal equipment message in the relay node message after the relay node receives the terminal equipment message from the terminal equipment, indicates the encapsulated content in the relay node message as the terminal equipment message, then forwards the terminal equipment message to the network selection equipment, obtains the core network corresponding to the terminal equipment by the network selection equipment according to the terminal equipment identity information in the relay node message, then forwards the terminal equipment message to the corresponding first core network equipment, and carries out subsequent processing on the terminal equipment message by the first core network equipment, so that the network side can identify the identity information of the terminal equipment and carry out corresponding processing, further carries out differentiated management on the terminal equipment message and the signaling or data sent by the relay node per se, and solves the problem that the terminal equipment is accessed to the network by the identity of the relay node, so that the network side cannot identify the terminal equipment.
In one possible design, the network selection device selects network elements or core network devices for the individual networks. This design makes it possible for the network selection device of the invention to be applied to different network elements.
In one possible design, the method further includes: the first core network equipment analyzes the new terminal equipment message to obtain relay node identity information and terminal equipment identity information, wherein the new terminal equipment message is generated by adding the relay node identity information to the terminal equipment message by the network selection equipment; the first core network device stores the relay node identity information and the terminal device identity information in a context for addressing the terminal device during downlink addressing, or stores the relay node identity information and the terminal device identity information in a node management module for managing the relay node and the position of the relay node by the node management module. The design enables the relay node identity information to be stored in the local context, and when downlink data is subjected to downlink addressing, the corresponding relay node can be found according to the relay node identity information.
In one possible design, the method further includes: the first core network equipment analyzes the new terminal equipment message to obtain access side information, wherein the new terminal equipment message is generated by adding the access side information to the terminal equipment message by the network selection equipment; the first core network device stores the access side information in the context for addressing the terminal device during downlink addressing, or stores the access side information in the node management module for managing the relay node and the position thereof by the node management module. The design enables the access side information to be stored in the local context, and when downlink data is subjected to downlink addressing, the corresponding relay node can be found according to the access side information.
In one possible design, the method further includes: the first core network equipment analyzes the new terminal equipment message to obtain a terminal equipment access identifier, wherein the new terminal equipment message is generated by adding the terminal equipment access identifier to the terminal equipment message by the network selection equipment; the first core network device stores the terminal device access identification in the context for addressing the terminal device during downlink addressing. The design enables the terminal equipment access identification to be stored in the local context, and when downlink data is subjected to downlink addressing, the corresponding terminal equipment can be found according to the terminal equipment access identification.
In one possible design, the relay node message is carried on a signaling plane or a data plane of the relay node. The design is suitable for large data packet transmission when the data plane is used for carrying.
In one possible design, the method further includes: the first core network equipment receives downlink data; the first core network equipment generates a downlink terminal equipment message according to downlink data and a local context, wherein the local context comprises relay node identity information and a terminal equipment access identifier, and the downlink terminal equipment message comprises the downlink data, the relay node identity information and the terminal equipment access identifier; the first core network equipment sends downlink terminal equipment information to the network selection equipment, the downlink terminal equipment information is used for encapsulating the downlink terminal equipment information in the downlink relay node information by the network selection equipment according to the relay node identity information in the downlink terminal equipment information, the downlink relay node information is analyzed by the relay node to obtain the downlink terminal equipment information and a terminal equipment access identifier, the relay node finds corresponding terminal equipment according to the terminal equipment access identifier, and the relay node sends the downlink terminal equipment information to the corresponding terminal equipment. The design realizes that the local context established in the uplink direction provides assistance for downlink data to address the relay node and the terminal equipment, thereby realizing downlink indirect communication.
In another aspect, an embodiment of the present invention provides an indirect communication method, where the method includes: the relay node receives a terminal equipment message from the terminal equipment, wherein the terminal equipment message comprises terminal equipment identity information; the relay node analyzes the terminal equipment message to obtain the content of the terminal equipment message, constructs a proxy terminal equipment message according to the content of the terminal equipment message and initiates a message with the identity of the terminal equipment, wherein the proxy terminal equipment message comprises the identity information of the terminal equipment; the relay node sends the proxy terminal equipment message to the network selection equipment, the proxy terminal equipment message is used for determining a core network to which the terminal equipment belongs according to the terminal equipment identity information in the proxy terminal equipment message by the network selection equipment, the network selection equipment sends the proxy terminal equipment message to first core network equipment corresponding to the core network to which the terminal equipment belongs, and the corresponding first core network equipment carries out subsequent processing on the proxy terminal equipment message. The indirect communication method provided by the embodiment of the invention simulates the terminal equipment message through the relay node, constructs the proxy terminal equipment message, wherein, the proxy terminal device message contains the terminal device identity information, then the terminal device identity information is forwarded to the network selection device, the network selection device obtains the core network corresponding to the terminal device according to the terminal device identity information in the relay node message, then the information is forwarded to the corresponding first core network equipment, the first core network equipment carries out subsequent processing on the terminal equipment information, thereby leading the network side to be capable of identifying the identity information of the terminal equipment and carrying out corresponding processing, and then the differentiation management can be carried out on the terminal equipment message and the signaling or data sent by the relay node, so that the problem that the network side cannot identify the terminal equipment because the terminal equipment is accessed to the network by the identity of the relay node is solved.
In one possible design, the network selection device selects network elements or core network devices for the individual networks. This design makes it possible for the network selection device of the invention to be applied to different network elements.
In one possible design, the method further includes: the agent terminal equipment message also contains access side information, and the access side information is used for storing the access side information of the first core network equipment in a local context for addressing the terminal equipment during downlink addressing, or storing the access side information in a node management module for managing the relay node and the position of the relay node by the node management module. The design enables the access side information to be stored in the local context, and when downlink data is subjected to downlink addressing, the corresponding relay node can be found according to the access side information.
In one possible design, the method further includes: the proxy terminal device message also contains a terminal device access identifier, and the terminal device access identifier is used for storing the terminal device access identifier in a local context by the first core network device and is used for addressing the terminal device during downlink addressing. The design enables the terminal equipment access identification to be stored in the local context, and when downlink data is subjected to downlink addressing, the corresponding terminal equipment can be found according to the terminal equipment access identification.
In one possible design, the method further includes: a relay node receives downlink terminal equipment information, wherein the downlink terminal equipment information is generated by first core network equipment according to downlink data and a local context, the relay node performs downlink addressing for network selection equipment according to terminal equipment identity information in the downlink terminal equipment information, the local context comprises the terminal equipment identity information and a terminal equipment access identifier, and the downlink terminal equipment information comprises downlink data, the terminal equipment identity information and the terminal equipment access identifier; the relay node analyzes the downlink terminal equipment message, and finds the corresponding terminal equipment according to the terminal equipment identity access identification in the downlink terminal equipment message; and the relay node sends the downlink terminal equipment message to the corresponding terminal equipment. The design realizes that the local context established in the uplink direction provides assistance for downlink data to address the relay node and the terminal equipment, thereby realizing downlink indirect communication.
In another aspect, an embodiment of the present invention provides an indirect communication method, where the method includes: the network selection equipment receives a proxy terminal equipment message, wherein the proxy terminal equipment message is constructed by a relay node according to the content of the terminal equipment message, the proxy terminal equipment message is used for initiating a message by the relay node according to the identity of the terminal equipment, the content of the terminal equipment message is obtained by analyzing the terminal equipment message from the terminal equipment by the relay node, the terminal equipment message comprises terminal equipment identity information, and the proxy terminal equipment message comprises the terminal equipment identity information; the network selection equipment determines a core network to which the terminal equipment belongs according to the terminal equipment identity information in the proxy terminal equipment message; the network selection equipment sends the proxy terminal equipment message to first core network equipment corresponding to a core network to which the terminal equipment belongs, and the corresponding first core network equipment carries out subsequent processing on the proxy terminal equipment message. The indirect communication method provided by the embodiment of the invention simulates the terminal equipment message through the relay node, constructs the proxy terminal equipment message, wherein, the proxy terminal device message contains the terminal device identity information, then the terminal device identity information is forwarded to the network selection device, the network selection device obtains the core network corresponding to the terminal device according to the terminal device identity information in the relay node message, then the information is forwarded to the corresponding first core network equipment, the first core network equipment carries out subsequent processing on the terminal equipment information, thereby leading the network side to be capable of identifying the identity information of the terminal equipment and carrying out corresponding processing, and then the differentiation management can be carried out on the terminal equipment message and the signaling or data sent by the relay node, so that the problem that the network side cannot identify the terminal equipment because the terminal equipment is accessed to the network by the identity of the relay node is solved.
In one possible design, the network selection device selects network elements or core network devices for the individual networks. This design makes it possible for the network selection device of the invention to be applied to different network elements.
In one possible design, the determining, by the network selection device, a core network to which the terminal device belongs according to the terminal device identity information in the proxy terminal device message includes: and the network selection equipment acquires the subscription information of the terminal equipment from the user database according to the terminal equipment identity information in the proxy terminal equipment message, and judges the core network to which the terminal equipment belongs according to the subscription information of the terminal equipment. The design provides a method for judging the core network to which the terminal equipment belongs according to the identity information of the terminal equipment.
In one possible design, the network selection device sends the proxy terminal device message to a first core network device corresponding to a core network to which the terminal device belongs, and the corresponding first core network device performs subsequent processing on the proxy terminal device message, including: if the network selection equipment is the core network equipment corresponding to the core network to which the terminal equipment belongs, the network selection equipment carries out subsequent processing on the proxy terminal equipment message, otherwise, the network selection equipment forwards the proxy terminal equipment message to first core network equipment corresponding to the core network to which the terminal equipment belongs, and the first core network equipment carries out subsequent processing on the proxy terminal equipment message. The design enables the embodiment of the invention to carry out subsequent processing on the terminal equipment message according to the core network equipment corresponding to the core network to which the terminal equipment belongs.
In one possible design, the method further includes: the network selection equipment receives downlink terminal equipment information, wherein the downlink terminal equipment information is generated by first core network equipment according to downlink data and a local context, the local context comprises terminal equipment identity information and a terminal equipment access identifier, and the downlink terminal equipment information comprises the downlink data, the terminal equipment identity information and the terminal equipment access identifier; the network selection equipment carries out downlink addressing according to the terminal equipment identity information in the downlink terminal equipment message to find a corresponding relay node; the network selection equipment sends the downlink terminal equipment message to the corresponding relay node, the corresponding relay node analyzes the downlink terminal equipment message, the corresponding relay node finds the corresponding terminal equipment according to the terminal equipment access identification in the downlink terminal equipment message, and the corresponding relay node sends the downlink terminal equipment message to the corresponding terminal equipment. The design realizes that the local context established in the uplink direction provides assistance for downlink data to address the relay node and the terminal equipment, thereby realizing downlink indirect communication.
In another aspect, an embodiment of the present invention provides an indirect communication method, where the method includes: the method comprises the steps that a first core network device receives a proxy terminal device message from a network selection device, wherein the first core network device is a core network device corresponding to a core network to which the terminal device belongs, the core network to which the terminal device belongs is determined by the network selection device according to terminal device identity information in the proxy terminal device message, the proxy terminal device message is constructed by a relay node according to the content of the terminal device message, the proxy terminal device message is used for initiating a message by the relay node according to the identity of the terminal device, the content of the terminal device message is obtained by analyzing the terminal device message from the terminal device by the relay node, the terminal device message comprises the terminal device identity information, and the proxy terminal device message comprises the terminal device identity information; and the first core network equipment carries out subsequent processing on the terminal equipment message. The indirect communication method provided by the embodiment of the invention simulates the terminal equipment message through the relay node, constructs the proxy terminal equipment message, wherein, the proxy terminal device message contains the terminal device identity information, then the terminal device identity information is forwarded to the network selection device, the network selection device obtains the core network corresponding to the terminal device according to the terminal device identity information in the relay node message, then the information is forwarded to the corresponding first core network equipment, the first core network equipment carries out subsequent processing on the terminal equipment information, thereby leading the network side to be capable of identifying the identity information of the terminal equipment and carrying out corresponding processing, and then the differentiation management can be carried out on the terminal equipment message and the signaling or data sent by the relay node, so that the problem that the network side cannot identify the terminal equipment because the terminal equipment is accessed to the network by the identity of the relay node is solved.
In one possible design, the network selection device selects network elements or core network devices for the individual networks. This design makes it possible for the network selection device of the invention to be applied to different network elements.
In one possible design, the method further includes: the first core network equipment analyzes the proxy terminal equipment message to obtain access side information, and the access side information is carried in the proxy terminal equipment message by the relay node; the first core network device stores the access side information in the context for addressing the terminal device during downlink addressing, or stores the access side information in the node management module for managing the relay node and the position thereof by the node management module. The design enables the access side information to be stored in the local context, and when downlink data is subjected to downlink addressing, the corresponding relay node can be found according to the access side information.
In one possible design, the method further includes: the first core network equipment analyzes the proxy terminal equipment message to obtain a terminal equipment access identifier, and the terminal equipment access identifier is carried in the proxy terminal equipment message by the relay node; the first core network device stores the terminal device access identification in the context for addressing the terminal device during downlink addressing. The design enables the terminal equipment access identification to be stored in the local context, and when downlink data is subjected to downlink addressing, the corresponding terminal equipment can be found according to the terminal equipment access identification.
In one possible design, the relay node message is carried on a signaling plane or a data plane of the relay node. The design is suitable for large data packet transmission when the data plane is used for carrying.
In one possible design, the method further includes: the first core network equipment receives downlink data; the first core network equipment generates downlink terminal equipment information according to downlink data and local context, wherein the local context comprises terminal equipment identity information and a terminal equipment access identifier, and the downlink terminal equipment information comprises the downlink data, the terminal equipment identity information and the terminal equipment access identifier; the first core network equipment sends downlink terminal equipment information to the network selection equipment, the downlink terminal equipment information is used for carrying out downlink addressing by the network selection equipment according to terminal equipment identity information in the downlink terminal equipment information to find a corresponding relay node, the downlink terminal equipment information is forwarded to the corresponding relay node, the corresponding relay node analyzes the downlink terminal equipment information, the corresponding relay node finds corresponding terminal equipment according to a terminal equipment access identifier in the downlink terminal equipment information, and the corresponding relay node sends the downlink terminal equipment information to the corresponding terminal equipment. The design realizes that the local context established in the uplink direction provides assistance for downlink data to address the relay node and the terminal equipment, thereby realizing downlink indirect communication.
In another aspect, an embodiment of the present invention provides a relay node, where the relay node may implement a function performed by the relay node in the foregoing method example, where the function may be implemented by hardware, or may be implemented by hardware to execute corresponding software. The hardware or software comprises one or more modules corresponding to the functions.
In one possible design, the apparatus includes a processor and a transceiver in the structure, and the processor is configured to support the apparatus to perform the corresponding functions of the method. The transceiver is for supporting communication between the apparatus and other network elements. The apparatus may also include a memory, coupled to the processor, that retains program instructions and data necessary for the apparatus.
In another aspect, an embodiment of the present invention provides a network selection device, where the apparatus may implement the function executed by the network selection device in the foregoing method embodiment, where the function may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software comprises one or more modules corresponding to the functions.
In one possible design, the apparatus includes a processor and a communication interface, and the processor is configured to support the apparatus to perform the corresponding functions of the method. The communication interface is used to support communication between the apparatus and other network elements. The apparatus may also include a memory, coupled to the processor, that retains program instructions and data necessary for the apparatus.
In another aspect, an embodiment of the present invention provides a first core network device, where the apparatus may implement the function executed by the first core network device in the foregoing method embodiment, where the function may be implemented by hardware, and may also be implemented by hardware executing corresponding software. The hardware or software comprises one or more modules corresponding to the functions.
In one possible design, the apparatus includes a processor and a communication interface, and the processor is configured to support the apparatus to perform the corresponding functions of the method. The communication interface is used to support communication between the apparatus and other network elements. The apparatus may also include a memory, coupled to the processor, that retains program instructions and data necessary for the apparatus.
In another aspect, an embodiment of the present invention provides a communication system, where the communication system includes the apparatus capable of implementing the function of the relay node, the apparatus capable of implementing the function of the network selection device, and the apparatus capable of implementing the function of the first core network device described in the foregoing aspects.
In yet another aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions for the relay node, which includes a program designed to execute the above aspects.
In yet another aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions for the network selection device, which includes a program designed to execute the above aspects.
In another aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions for the first core network device, which includes a program designed to execute the above aspects.
Compared with the prior art, in the solution provided in the embodiment of the present invention, the relay node directly communicates with the network side and supports the terminal device to indirectly communicate with the network side through the relay node, during indirect communication, the relay device forwards the terminal device message including the terminal device identity information, the relay node encapsulates the terminal device message in the relay device message and indicates the encapsulated content as the terminal device message, or parses the terminal device message to obtain the content of the terminal device message, reconstructs a way of proxying the terminal device message according to the content of the terminal device message, and forwards the generated message to the network side, so that the network side can obtain the terminal device identity information and identify the terminal device accordingly, and simultaneously performs independent management on the terminal device and the relay node, such as independent ID, subscription, access authentication, charging, and the like, and the terminal equipment and the relay node can be accessed to different core networks, so that the problem that the network side cannot identify the terminal equipment because the terminal equipment is accessed to the network by the identity of the relay node is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a network communication system according to an embodiment of the present invention;
fig. 2 is a hardware structure diagram of a relay node according to an embodiment of the present invention;
fig. 3 is a hardware configuration diagram of a network selection device according to an embodiment of the present invention;
fig. 4 is a hardware configuration diagram of a first core network device according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a first indirect communication method according to an embodiment of the present invention;
FIG. 6 is a flow chart of a second indirect communication method according to an embodiment of the present invention;
fig. 7 is a flowchart illustrating a third indirect communication method according to an embodiment of the present invention;
FIG. 8 is a schematic flow chart of a fourth indirect communication method provided by the embodiment of the invention;
fig. 9 is a schematic flow chart of a fifth indirect communication method according to an embodiment of the present invention;
fig. 10 is a flowchart illustrating a sixth indirect communication method according to an embodiment of the present invention;
fig. 11 is a flowchart illustrating a seventh indirect communication method according to an embodiment of the present invention;
fig. 12 is a flowchart illustrating an eighth indirect communication method according to an embodiment of the present invention;
fig. 13 is a flowchart illustrating a ninth indirect communication method according to an embodiment of the present invention;
fig. 14 is a flowchart illustrating a tenth indirect communication method according to an embodiment of the present invention;
fig. 15 is a flowchart illustrating an eleventh indirect communication method according to an embodiment of the present invention;
fig. 16 is a flowchart illustrating a twelfth indirect communication method according to an embodiment of the present invention;
fig. 17 is a flowchart illustrating a thirteenth indirect communication method according to an embodiment of the present invention;
fig. 18 is a schematic structural diagram of a relay node according to an embodiment of the present invention;
fig. 19 is a schematic structural diagram of another relay node according to an embodiment of the present invention;
fig. 20 is a schematic structural diagram of another relay node according to an embodiment of the present invention;
fig. 21 is a schematic structural diagram of a network selection device according to an embodiment of the present invention;
fig. 22 is a schematic structural diagram of another network selection device according to an embodiment of the present invention;
fig. 23 is a schematic structural diagram of another network selection device according to an embodiment of the present invention;
fig. 24 is a schematic structural diagram of a core network device according to an embodiment of the present invention;
fig. 25 is a schematic structural diagram of another core network device according to an embodiment of the present invention;
fig. 26 is a schematic structural diagram of another core network device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As used in this application, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being: a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of example, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between two or more computers. In addition, these components can execute from various computer readable media having various data structures thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from one component interacting with another component in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).
Further, various aspects are described herein in connection with a wireless network device, which may be configured to communicate with one or more relay nodes; the terminal device may be a user device, may be used for communication with one or more user devices (for example, D2D (device to device, chinese) and may also be used for communication with one or more access network devices. The relay node may be a user equipment and may include some or all of the functionality of a system, subscriber unit, subscriber station, mobile wireless terminal, mobile device, node, device, remote station, remote terminal, wireless communication device, wireless communication apparatus, or user agent. The relay node may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a smart phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a laptop computer, a handheld communication device, a handheld computing device, a satellite radio, a wireless modem card, and/or other processing device for communicating over a wireless system. An access network device may also be referred to as an access point, a node B, an evolved node B (enb), or some other network entity, and may include some or all of the functionality of the above network entities. The access network device may communicate with the relay node over an air interface. The communication may be through one or more sectors. The access network device may act as a router between the wireless terminal and the rest of the access network, including an Internet Protocol (IP) network, by converting received air-interface frames to IP packets. The access network device may also coordinate management of air interface attributes and may also be a gateway between a wired network and a wireless network.
This application is intended to present various aspects, embodiments or features around a system that may include a number of devices, components, modules, and the like. It is to be understood and appreciated that the various systems may include additional devices, components, modules, etc. and/or may not include all of the devices, components, modules etc. discussed in connection with the figures. Furthermore, a combination of these schemes may also be used.
Additionally, in embodiments of the present invention, the term "exemplary" is used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the term using examples is intended to present concepts in a concrete fashion.
In the embodiment of the present invention, information (information), signal (signal), message (message), and channel (channel) may be mixed, and it should be noted that the intended meanings are consistent when the differences are not emphasized. "of" and "corresponding" may sometimes be used in combination, it being noted that the intended meaning is consistent when no distinction is made.
The network architecture and the service scenario described in the embodiment of the present invention are for more clearly illustrating the technical solution of the embodiment of the present invention, and do not form a limitation on the technical solution provided in the embodiment of the present invention, and it can be known by those skilled in the art that the technical solution provided in the embodiment of the present invention is also applicable to similar technical problems along with the evolution of the network architecture and the appearance of a new service scenario.
The embodiment of the invention can be applied to a Time Division Duplexing (TDD) scene and a Frequency Division Duplexing (FDD) scene.
The embodiment of the present invention is described by referring to a scenario of a 4G network in a wireless communication network, it should be noted that the scheme in the embodiment of the present invention may also be applied to LTE and its evolution technology, for example, 5G, and the corresponding name may also be replaced by a name of a corresponding function in other wireless communication networks.
The terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby the features defined "first", "second" may explicitly or implicitly include one or more of such features. In the following embodiments, "first" and "second" are used only for distinction, such as a first core network device and a second core network device.
An embodiment of the present invention provides a network communication system, and as shown in fig. 1, the system includes: the system comprises a terminal device 11, a relay node 12, AN access network device 13, a network selection device 14, a first core network device 15, and optionally, a server 16.
The network selection device 14 may comprise a network selection element (network selection function) or a second core network device. The network selection device 14 is mainly used for completing core network selection and message distribution according to subscription information of the terminal device or the relay node. The network selection device described in the embodiment of the present invention may be an independent network selection network element, or may be a second core network device.
It should be noted that the second core network device and the first core network device both belong to the core network device, where the second core network device queries corresponding subscription information from the user database according to the identity information of the terminal device or the relay node in the message received from the terminal device or the relay node, and determines the core network to which the terminal device or the relay node belongs according to the subscription information, if the first device belongs to the core network to which the terminal device or the relay node belongs, the received data is subjected to subsequent processing, and if the second core network device does not belong to the core network to which the terminal device or the relay node belongs, the second core network device searches for the first core network device belonging to the core network, and forwards the received data to the first core network device, which is subjected to subsequent processing by the first core network device; subsequent processing may include, but is not limited to, attach/registration, authentication, encryption, access control, terminal management, mobility management, data packet routing and forwarding, policy control, charging, forwarding data to a server, and the like.
The terminal device 11 may include, for example, an M2M (english full name: machine to machine, chinese full name: machine and machine) terminal, a smart band, and the like; the relay node 12 may include, for example, a cell phone terminal, a gateway device, etc.; the access network device 13 is configured to forward the message or the data from the relay node to a network selection network element or a second core network device, and according to different network protocols, the access network device 13 may be, for example, an eNodeB (full english name: evolved node B, full chinese name: evolved node B) in a 3GPP (full english name: 3rd generation partnership project, full chinese name: third generation partnership project) protocol, or an AP (full english name: access point, full chinese name: access point) in a WiFi protocol, and in the embodiment of the present invention, the eNodeB is taken as an example; the first Core network device 15 is mainly used for providing functions of terminal attachment/registration, authentication, encryption, access control, terminal management, mobility management, data packet routing and forwarding, policy control, charging, and the like, and may be divided into several modules according to functions and deployment locations, in the embodiment of the present invention, an M-IoT Core is taken as an example; server 16 generally refers to an application server that provides services in a particular industry.
Referring to fig. 2, which is a hardware structure diagram of a relay node in an embodiment of the present invention, a relay node 12 includes a communication module 1201, a processor 1202, an erasable memory 1203, and an erasable memory 1204, where the communication module 1201 is configured to communicate with other communication devices, the erasable memory 1203 is configured to store executable program codes and parameters, such as a kernel (full english name: kernel), a middleware (full english name: middleware), an application program interface (full english name: application programming interface, abbreviated english: API), an application program, and the like, the erasable memory 1204 is configured to store variables or run program codes, and the processor 1202 is configured to control the communication module 1201 to communicate, read the program codes and the curing parameters in the erasable memory 1203, and read and write the erasable memory 1204 to execute the program codes or the variables.
Referring to fig. 3, which is a hardware structure diagram of the network selection device in the embodiment of the present invention, the network selection device 14 includes a communication module 1401, a processor 1402, a non-erasable memory 1403 and an erasable memory 1404, where the communication module 1401 is used for the network selection device 14 to communicate with other communication devices, the non-erasable memory 1403 is used for storing executable program codes and parameters, such as kernels, middleware, application interfaces, application programs, and the like, the erasable memory 1404 is used for storing variables or running program codes, the processor 1402 is used for controlling the communication module 1401 to communicate, reading the program codes and the solidified parameters in the non-erasable memory 1403, and the read-write erasable memory 1404 executes the program codes or the variables.
Referring to fig. 4, the first core network device 15 in the embodiment of the present invention includes a communication module 1501, a processor 1502, a non-erasable memory 1503 and an erasable memory 1504, where the communication module 1501 is used for the first core network device 15 to communicate with other communication devices, the non-erasable memory 1503 is used for storing executable program codes and parameters, such as kernels, middleware, application interfaces, application programs, and the like, the erasable memory 1504 is used for storing variables or running program codes, the processor 1502 is used for controlling the communication module 1501 to communicate, reading the program codes and the solidification parameters in the non-erasable memory 1503, and the read-write-erasable memory 1504 is used for executing the program codes or the variables, and the like.
The communication module is used for connecting the equipment with other terminals, servers and networks. For example, the communication interface may be connected to a network by wire or wirelessly to connect to an external other terminal or server. The wireless communication may include at least one of: bluetooth, WiFi, Near Field Communication (NFC), GPS (Global positioning System), and cellular communication (cellular communication), such as LTE (Long term evolution), LTE-A (Long term evolution), CDMA (code division multiple Access), WCDMA (wideband code division multiple Access), UMTS (Universal wideband code division multiple Access), broadband Mobile communication (Wireless Mobile communication), chinese characters are fully called: global system for mobile communications), etc. The wired communication may include at least one of: USB (universal serial bus for English, universal serial bus for Chinese), HDMI (high definition multimedia interface for Chinese), RS-232 (recommended standard 232 for Chinese), POTS (plain old telephone service for Chinese).
The terminal equipment identity information in the embodiment of the invention refers to information for identifying the characteristics of the terminal equipment, and is used for uniquely identifying the terminal equipment, such as terminal equipment IDs (international mobile subscriber identity) of IMSI (international mobile subscriber identity), GUTI (global unique temporary UE identity, Chinese full name) and TMSI (temporary mobile subscriber identity) and the like; the relay node identity information refers to information for identifying characteristics of the relay node, and is used for uniquely identifying the relay node, such as a relay node ID; the terminal device access identifier refers to an identifier used when the terminal device communicates with the relay node, for example, an MAC address in a WiFi protocol, a bluetooth identifier in a bluetooth protocol, and the like.
The terminal equipment message in the embodiment of the invention refers to a signaling or data message sent to a core network by the terminal equipment through a relay node; the relay node message is a message generated by encapsulating the terminal equipment message by the relay node, or a signaling or data message sent to the core network by the relay node itself for performing a service, and both the relay node message and the terminal equipment message include the relay node identity information when the terminal equipment message is encapsulated or the relay node itself performs a service.
The user database in the embodiment of the present invention refers to a server storing the subscription information of the devices such as the user device or the terminal device in the core network, for example, HSS (home subscriber server, home location register, or home location register, or home location register, or home location register; the subscription information refers to a service type, a usage type, a device type, and the like subscribed to the user equipment or the terminal equipment.
The access side information in the embodiment of the present invention is used to indicate access network information of the relay node, such as TAI (total name of tracking area identity, chinese total name: tracking area identifier), CGI (total name of cell global identity, chinese total name: cell global identity), and the like.
The embodiment of the invention supports direct communication between the relay node and the network side, and supports indirect communication between the terminal equipment and the network side through the relay node, when the indirect communication is performed, the relay node forwards a terminal equipment message containing terminal equipment identity information, the relay node encapsulates the terminal equipment message in the relay equipment message and indicates the encapsulated content as the terminal equipment message, or analyzes the terminal equipment message to obtain the content of the terminal equipment message, reconstructs a mode of acting the terminal equipment message according to the content of the terminal equipment message, and forwards the generated message to the network side, so that the network side can obtain the terminal equipment identity information and identify the terminal equipment according to the terminal equipment identity information, and simultaneously performs independent management on the terminal equipment and the relay node, such as independent ID, subscription, access authentication, charging and the like, and the terminal equipment and the relay node can be accessed into different core networks, therefore, the problem that the terminal equipment can not be identified by the network side because the terminal equipment is accessed to the network by the identity of the relay node is solved.
An embodiment of the present invention provides an indirect communication method, which is shown in fig. 5 and includes:
s101, the relay node receives a terminal device message from the terminal device.
The terminal equipment message comprises terminal equipment identity information.
S102, the relay node encapsulates the terminal equipment message in the relay node message, and indicates that the encapsulated content is the terminal equipment message in the relay node message.
The purpose of indicating the encapsulated content as the terminal equipment message in the relay node message is as follows: and distinguishing the terminal equipment message from signaling or data sent by the service of the relay node.
Optionally, when the relay node performs service transmission signaling or data, the relay node constructs a relay node message according to the relay node identity information, where the relay node message indicates that the encapsulated content is the signaling or data of the relay node.
S103, the relay node sends the relay node message to the network selection equipment.
The relay node may be forwarded to the network selection device via the access network device.
And S104, the network selection equipment receives the relay node message.
And S105, the network selection equipment determines the core network to which the terminal equipment belongs according to the terminal equipment identity information in the relay node message.
The network selection device firstly decapsulates the relay node message to obtain the terminal device message therein, and decapsulates the terminal device message to obtain the terminal device identity information therein.
The network selection device may query the user database according to the terminal device identity information in the relay node message to obtain subscription information of the terminal device, and determine a core network to which the terminal device belongs according to the subscription information of the terminal device.
Optionally, when the encapsulated content of the relay node message is signaling or data for a service performed by the relay node itself, the network side device decapsulates the relay node message to obtain the relay node identity information.
S106, the network selection equipment sends the terminal equipment message to first core network equipment corresponding to a core network to which the terminal equipment belongs.
And S107, the corresponding first core network equipment receives the terminal equipment message.
And S108, the corresponding first core network equipment carries out subsequent processing on the terminal equipment message.
The indirect communication method provided by the embodiment of the invention encapsulates the terminal equipment message in the relay node message after the relay node receives the terminal equipment message from the terminal equipment, indicates the encapsulated content in the relay node message as the terminal equipment message, then forwards the terminal equipment message to the network selection equipment, obtains the core network corresponding to the terminal equipment by the network selection equipment according to the terminal equipment identity information in the relay node message, then forwards the terminal equipment message to the corresponding first core network equipment, and carries out subsequent processing on the terminal equipment message by the first core network equipment, so that the network side can identify the identity information of the terminal equipment and carry out corresponding processing, further carries out differentiated management on the terminal equipment message and the signaling or data sent by the relay node per se, and solves the problem that the terminal equipment is accessed to the network by the identity of the relay node, so that the network side cannot identify the terminal equipment.
An embodiment of the present invention provides an indirect communication method, which is used when a network selection device in a system is a second core network device, and as shown in fig. 6, the method includes steps S201 to S215.
S201, the terminal device constructs a terminal device message, and transmits the terminal device message as data to the relay node through an air interface.
The terminal equipment message comprises terminal equipment identity information.
The terminal device message may be a signaling message or a data message, where the terminal device message includes terminal device identity information, such as a terminal device ID (identity), and the terminal device identity information serves to uniquely identify the terminal device.
S202, after receiving the terminal device message of the terminal device, the relay node encapsulates the terminal device message in the relay node message, and indicates that the encapsulated content is the terminal device message in the relay node message, but not the message sent by the service carried out by the relay node, so as to be different from the relay node message sent by the service carried out by the relay node.
Optionally, the relay node encapsulates the terminal device message in the relay node message by adding a header, where the relay node identity information is included.
The relay node message can be carried on a signaling plane or a data plane, and is more suitable for transmitting a large data packet when the data plane is adopted for carrying.
Optionally, the encapsulated content may be indicated as the terminal device message by a self-defined relay node signaling in the relay node message, or may be indicated as the terminal device message by a newly added cell in an existing relay node signaling in the relay node message.
Optionally, the relay node message may further include access side information.
Optionally, the relay node message may further include a terminal device access identifier.
This step corresponds to steps S101 and S102.
S203, when the relay node sends signaling or data by service, the relay node constructs a relay node message according to the identity information of the relay node.
And the relay node message indicates that the encapsulated content is signaling or data of the relay node.
And S204, the relay node sends the relay node message to the access network equipment.
S205, the access network equipment encapsulates the relay node message according to the communication protocol to generate an access network equipment forwarding message.
Illustratively, the communication protocol refers to, for example, a 3GPP protocol or a WiFi protocol.
S206, the access network equipment forwards the access network equipment forwarding message to the second core network equipment.
Steps S204-S206 correspond to step S103.
And S207, the second core network device decapsulates the access network device forwarding message to obtain a relay node message, and determines according to the encapsulated content indicated by the relay node message, if the encapsulated content of the relay node message is a terminal device message, the step S208 is performed, and if the encapsulated content of the relay node message is signaling or data of a relay node, the step S212 is performed.
And S208, if the encapsulated content of the relay node message is the terminal equipment message, the second core network equipment decapsulates the relay node message to obtain the terminal equipment message, and decapsulates the terminal equipment message to obtain the terminal equipment identity information.
Optionally, the second core network device decapsulates the relay node message and may further obtain the relay node identity information.
Optionally, the second core network device decapsulates the relay node message and may further obtain access side information. The access side information is used for indicating access network information of the relay node, such as TAI, CGI, and the like.
Optionally, the second core network device decapsulates the relay node message and may further obtain the terminal device access identifier.
The second core network device may also authenticate the relay node and the terminal device.
S209, the second core network device queries the user database according to the identity information of the terminal device to obtain the subscription information of the terminal device, and judges the core network to which the terminal device belongs according to the subscription information of the terminal device.
Steps S207 to S209 correspond to step S105.
S210, if the second core network device is the core network device corresponding to the core network to which the terminal device belongs, the second core network device performs subsequent processing on the terminal device message, otherwise, the second core network device sends the terminal device message to the first core network device corresponding to the core network to which the terminal device belongs.
Optionally, the second core network device may add the relay node identity information obtained in the process of decapsulating the relay node message to the terminal device message and send the terminal device message to the first core network device.
Optionally, the second core network device may add the access side information to the terminal device message and send the terminal device message to the first core network device.
Optionally, the second core network device may add the terminal device access identifier to the terminal device message and send the terminal device access identifier to the first core network device.
This step corresponds to step S106.
S211, the first core network equipment analyzes the terminal equipment message to obtain the terminal equipment identity information, and the first core network equipment carries out subsequent processing on the terminal equipment message.
Optionally, the first core network device may further analyze the terminal device message to obtain relay node identity information, and store the relay node identity information and the terminal device identity information in a local context for addressing the terminal device during downlink addressing, or store the relay node identity information and the terminal device identity information in the node management module for managing the relay node and the location thereof by the node management module.
Optionally, the first core network device may further analyze the terminal device message to obtain access side information, and store the access side information in a local context for addressing the terminal device during downlink addressing, or store the access side information in the node management module for managing the relay node and the location thereof by the node management module.
Optionally, the first core network device may further parse the terminal device message to obtain a terminal device access identifier, and store the terminal device access identifier in a local context for addressing the terminal device during downlink addressing.
Optionally, the first core network device may send the terminal device identity information to a corresponding server.
This step corresponds to step S108.
S212, if the encapsulation content of the relay node message is signaling or data sent by the relay node for service, the second core network device decapsulates the relay node message to obtain the relay node identity information.
And S213, the second core network equipment queries the user database according to the identity information of the relay node to obtain the subscription information of the relay node, and judges the core network to which the relay node belongs according to the subscription information of the relay node.
And S214, if the second core network equipment is the core network equipment corresponding to the core network to which the relay node belongs, the second core network equipment performs subsequent processing on the relay node message, otherwise, the second core network equipment sends the relay node message to the first core network equipment corresponding to the core network to which the relay node belongs.
S215, the first core network equipment analyzes the relay node message to obtain the relay node identity information, and performs subsequent processing on the relay node message.
In the indirect communication method provided by the embodiment of the present invention, after a relay node receives a terminal device message of a terminal device, the terminal device message is encapsulated in the relay node message through the relay node, and when the relay node message indicates that the encapsulated content is the terminal device message and forwards the terminal device message, a second core network device queries a user database according to the terminal device identity information in the terminal device message to obtain subscription information of the terminal device, and determines a core network to which the terminal device belongs according to the subscription information of the terminal device, and then sends the terminal device message to a corresponding first core network device, and the first core network device performs subsequent processing on the terminal device message, so that the first core network device can identify the identity information of the terminal device and perform corresponding processing; when the relay node sends signaling or data for service, the relay node constructs a relay node message according to the relay node identity information, wherein the relay node message indicates that the encapsulated content is the signaling or data for service sending of the relay node, when forwarding is carried out, the second core network device queries a user database according to the relay node identity information in the relay node message to obtain subscription information of the relay node, judges the core network to which the relay node belongs according to the subscription information of the relay node, then sends the relay node message to the corresponding first core network device, and the first core network device carries out subsequent processing on the relay node message, so that the network side can identify the identity information of the relay node and carry out corresponding processing. And then the differentiation management can be carried out on the terminal equipment message and the signaling or data sent by the relay node for carrying out service, and the problem that the network side cannot identify the terminal equipment because the terminal equipment is accessed to the network by the identity of the relay node is solved. And the terminal equipment identity information and the relay node identity information can be sent to servers corresponding to different core networks.
An embodiment of the present invention provides an indirect communication method, which is shown in fig. 7 when a network selection network element exists in a system, and the method includes steps S301 to S315. Steps S301 to S305 are the same as steps S201 to S205 shown in fig. 6, and are not described herein again. The following describes a different part from the step shown in fig. 6.
S306, the access network equipment forwards the access network equipment forwarding message to the network selection network element.
Steps S304-S306 correspond to step S103.
S307, the network selection network element decapsulates the access network device forwarding message to obtain a relay node message, and determines according to the encapsulated content indicated by the relay node message, if the encapsulated content of the relay node message is a terminal device message, the step S308 is performed, and if the encapsulated content of the relay node message is signaling or data sent by the relay node itself for service, the step S312 is performed.
S308, if the relay node message encapsulation content is the terminal equipment message, the network selects the network element to decapsulate the relay node message to obtain the terminal equipment message, and decapsulates the terminal equipment message to obtain the terminal equipment identity information.
Optionally, the network selection network element decapsulates the relay node message and may further obtain the relay node identity information.
Optionally, the network selection network element decapsulates the relay node message and may further obtain access side information. The access side information is used for indicating access network information of the relay node, such as TAI, CGI, and the like.
Optionally, the network selection network element decapsulates the relay node message and may further obtain the terminal device access identifier.
The network selection network element can also authenticate the relay node and the terminal equipment.
S309, the network selection network element obtains the subscription information of the terminal equipment from the user database according to the identity information of the terminal equipment, and judges the core network to which the terminal equipment belongs according to the subscription information of the terminal equipment.
Steps S307 to S309 correspond to step S105.
S310, the network selection network element forwards the terminal equipment message to first core network equipment corresponding to a core network to which the terminal equipment belongs.
Optionally, the network selection network element may add the relay node identity information obtained in the process of decapsulating the relay node message to the terminal device message and send the terminal device message to the first core network device.
Optionally, the network selection network element may further add the access side information to the terminal device message and send the terminal device message to the first core network device.
Optionally, the network selection network element may further add the terminal device access identifier to the terminal device message and send the terminal device access identifier to the first core network device.
This step corresponds to step S106.
S311, the first core network device analyzes the terminal device message to obtain the terminal device identity information, and the first core network device performs subsequent processing on the terminal device message.
Optionally, the first core network device may further analyze the terminal device message to obtain relay node identity information, and store the relay node identity information and the terminal device identity information in a local context for addressing the terminal device in downlink addressing, or store the relay node identity information and the terminal device identity information in the node management module for managing the relay node and the location thereof by the node management module.
Optionally, the first core network device may further analyze the terminal device message to obtain access side information, and store the access side information in a local context for addressing the terminal device during downlink addressing, or store the access side information in the node management module for managing the relay node and the location thereof by the node management module.
Optionally, the first core network device may further parse the terminal device message to obtain a terminal device access identifier, and store the terminal device access identifier in a local context for addressing the terminal device during downlink addressing.
Optionally, the first core network device may send the terminal device identity information to a corresponding server.
This step corresponds to step S108.
S312, if the encapsulation content of the relay node message is the relay node message sent by the relay node for service, the network selection network element decapsulates the relay node message to obtain the relay node identity information.
S313, the network selection network element queries the user database according to the identity information of the relay node to obtain the subscription information of the relay node, and judges the core network to which the relay node belongs according to the subscription information of the relay node.
And S314, the network selection network element forwards the relay node message to the first core network equipment corresponding to the core network to which the relay node belongs.
S315, the first core network equipment analyzes the relay node message to obtain the relay node identity information, and performs subsequent processing on the relay node message.
Optionally, the first core network device may send the relay node identity information to a corresponding server.
In the indirect communication method provided by the embodiment of the present invention, after a relay node receives a terminal device message of a terminal device, the terminal device message is encapsulated in the relay node message through the relay node, and when the relay node message indicates that the encapsulated content is the terminal device message and forwards the terminal device message, a network selection network element queries a user database according to the terminal device identity information in the terminal device message to obtain subscription information of the terminal device, and determines a core network to which the terminal device belongs according to the subscription information of the terminal device, and then sends a proxy terminal device message to a corresponding first core network device, and the first core network device performs subsequent processing on the proxy terminal device message, so that a network side can identify the identity information of the terminal device and perform corresponding processing; when the relay node sends signaling or data for service, the relay node constructs a relay node message according to the relay node identity information, wherein the relay node message indicates that the encapsulated content is the signaling or data for service sending of the relay node, when forwarding is carried out, a network selection network element queries a user database according to the relay node identity information in the relay node message to obtain subscription information of the relay node, judges a core network to which the relay node belongs according to the subscription information of the relay node, then sends the relay node message to corresponding first core network equipment, and carries out subsequent processing on the relay node message by the first core network equipment, so that a network side can identify the identity information of the relay node and carry out corresponding processing. And then can carry on the differentiation management to the signalling or data that terminal equipment message and relay node oneself carry on the business and send, have solved the terminal equipment and cut in the network with the identity of the relay node, make the problem of the terminal equipment of network side unable discernment, and can support and send terminal equipment identity information and relay node identity information to the server that different core networks correspond.
An embodiment of the present invention provides an indirect communication method, which is shown in fig. 8 and includes:
s401, the relay node receives a terminal device message from the object terminal device.
The terminal equipment message comprises terminal equipment identity information.
S402, the relay node analyzes the terminal equipment message to obtain the content of the terminal equipment message, and constructs a proxy terminal equipment message according to the content of the terminal equipment message to initiate a message with the identity of the terminal equipment.
The proxy terminal equipment message comprises terminal equipment identity information.
The step of initiating the message by the relay node with the identity of the terminal device in the embodiment of the present invention means: when other equipment directly analyzes the proxy terminal equipment message, the terminal equipment identity information is obtained, and the message is considered to come from the terminal equipment indicated by the terminal equipment identity information.
The purpose of constructing the proxy terminal equipment message in the relay node message is as follows: and distinguishing the terminal equipment message from signaling or data sent by the service of the relay node.
Optionally, when the relay node performs service transmission signaling or data, the relay node constructs a relay node message according to the relay node identity information, where the relay node message indicates that the encapsulated content is the signaling or data for the relay node to perform service transmission.
And S403, the relay node sends the proxy terminal equipment message to the network selection equipment.
The relay node may be forwarded to the network selection device via the access network device.
S404, the network selection equipment receives the proxy terminal equipment message.
S405, the network selection equipment determines a core network to which the terminal equipment belongs according to the terminal equipment identity information in the proxy terminal equipment message.
The network selection device firstly decapsulates the relay node message to obtain the terminal device message therein, and decapsulates the terminal device message to obtain the terminal device identity information therein.
The network selection device may query the user database according to the terminal device identity information in the relay node message to obtain subscription information of the terminal device, and determine a core network to which the terminal device belongs according to the subscription information of the terminal device.
Optionally, when the relay node performs service signaling or data transmission, the network side device decapsulates the relay node message to obtain the relay node identity information.
S406, the network selection device sends the proxy terminal device message to a first core network device corresponding to a core network to which the terminal device belongs.
And S407, the corresponding first core network equipment receives the proxy terminal equipment message.
And S408, the corresponding first core network equipment carries out subsequent processing on the proxy terminal equipment message.
The indirect communication method provided by the embodiment of the invention simulates the terminal equipment message through the relay node, constructs the proxy terminal equipment message, wherein, the proxy terminal device message contains the terminal device identity information, then the terminal device identity information is forwarded to the network selection device, the network selection device obtains the core network corresponding to the terminal device according to the terminal device identity information in the relay node message, then the information is forwarded to the corresponding first core network equipment, the first core network equipment carries out subsequent processing on the terminal equipment information, thereby leading the network side to be capable of identifying the identity information of the terminal equipment and carrying out corresponding processing, and then the differentiation management can be carried out on the terminal equipment message and the signaling or data sent by the relay node, so that the problem that the network side cannot identify the terminal equipment because the terminal equipment is accessed to the network by the identity of the relay node is solved.
An embodiment of the present invention provides an indirect communication method, which is shown in fig. 9 when a network selection network element is absent in a system, and the method includes:
s501, the terminal device constructs a terminal device message, and transmits the terminal device message as data to the relay node through an air interface.
The terminal equipment message comprises terminal equipment identity information.
This step is the same as S201, and is not described herein again.
S502, the relay node analyzes the terminal equipment message to obtain the content of the terminal equipment message, and constructs a proxy terminal equipment message according to the content of the terminal equipment message to initiate a message with the identity of the terminal equipment.
The proxy terminal device message may directly embody the message type, for example, may embody attach, subscription, access authentication, charging, and the like.
Optionally, the relay node constructs a proxy terminal device message according to the terminal device identity information and the content of the terminal device message, and initiates a message with the identity of the terminal device.
Optionally, the proxy terminal device message may further include access side information.
Optionally, the proxy terminal device message may further include a terminal device access identifier.
This step corresponds to steps S401 and S402.
S503, when the relay node sends signaling or data by itself, the relay node constructs a relay node message according to the relay node identity information.
The relay node message indicates that the encapsulated content is signaling or data sent by the relay node for service.
And S504, the relay node sends the proxy terminal equipment message or the relay node message to the access network equipment.
And S505, the access network equipment encapsulates the proxy terminal equipment message or the relay node message according to the communication protocol to generate an access network equipment forwarding message.
Illustratively, the communication protocol refers to, for example, a 3GPP protocol or a WiFi protocol.
S506, the access network equipment forwards the access network equipment forwarding message to the second core network equipment.
Steps S504-S506 correspond to step S403.
S507, the second core network device decapsulates the access network device forwarding message to obtain a relay node message or a proxy terminal device message, and then decapsulates the relay node message or the proxy terminal device message obtained by decapsulation.
S508, if the proxy terminal equipment message is decapsulated, the second core network equipment obtains the terminal equipment identity information, and the step S509 is carried out; if the relay node message is decapsulated, the second core network device obtains the relay node identity information, and then step S512 is performed.
And S509, the second core network device queries the user database according to the identity information of the terminal device to obtain subscription information of the terminal device, and judges a core network to which the terminal device belongs according to the subscription information of the terminal device.
Steps S507 to S509 correspond to step S405.
And S510, if the second core network device is the core network device corresponding to the core network to which the terminal device belongs, the second core network device performs subsequent processing according to the proxy terminal device message, otherwise, the second core network device sends the proxy terminal device message to the first core network device corresponding to the core network to which the terminal device belongs.
This step corresponds to step S406.
And S511, the first core network equipment analyzes the proxy terminal equipment message to obtain the terminal equipment identity information, and the first core network equipment carries out subsequent processing on the proxy terminal equipment message.
Optionally, the first core network device may further analyze the proxy terminal device message to obtain access side information, and store the access side information in a local context for addressing the terminal device during downlink addressing, or store the access side information in the node management module for managing the relay node and the location thereof by the node management module.
Optionally, the first core network device may further parse the proxy terminal device message to obtain a terminal device access identifier, and store the terminal device access identifier in a local context for addressing the terminal device during downlink addressing.
Optionally, the first core network device may send the terminal device identity information to a corresponding server.
This step corresponds to step S408.
And S512, the second core network equipment queries the user database according to the identity information of the relay node to obtain subscription information of the relay node, and judges the core network to which the relay node belongs according to the subscription information of the relay node.
And S513, if the second core network device is the core network device corresponding to the core network to which the relay node belongs, the second core network device performs subsequent processing on the relay node message, otherwise, the second core network device sends the relay node message to the first core network device corresponding to the core network to which the relay node belongs.
And S514, the first core network equipment analyzes the relay node message to obtain the relay node identity information, and performs subsequent processing on the relay node message.
In the indirect communication method provided by the embodiment of the invention, after a relay node receives a terminal device message of a terminal device, the relay node simulates the terminal device message to construct a proxy terminal device message, wherein the proxy terminal device message contains terminal device identity information, when forwarding is carried out, a second core network device queries a user database according to the terminal device identity information in the proxy terminal device message to obtain subscription information of the terminal device, judges a core network to which the terminal device belongs according to the subscription information of the terminal device, then sends the terminal device message to a corresponding first core network device, and carries out subsequent processing on the terminal device message by the first core network device, so that a network side can identify the identity information of the terminal device and carry out corresponding processing; when the relay node sends signaling or data for service, the relay node constructs a relay node message according to the relay node identity information, wherein the relay node message indicates that the encapsulated content is the signaling or data for service sending of the relay node, when forwarding is carried out, the second core network device queries a user database according to the relay node identity information in the relay node message to obtain subscription information of the relay node, judges the core network to which the relay node belongs according to the subscription information of the relay node, then sends the relay node message to the corresponding first core network device, and the first core network device carries out subsequent processing on the relay node message, so that the network side can identify the identity information of the relay node and carry out corresponding processing. And then can carry on the differentiation management to the signalling or data that terminal equipment message and relay node oneself carry on the business and send, have solved the terminal equipment and cut in the network with the identity of the relay node, make the problem of the terminal equipment of network side unable discernment, and can support and send terminal equipment identity information and relay node identity information to the server that different core networks correspond.
An embodiment of the present invention provides an indirect communication method, which is shown in fig. 10 when a network selection network element exists in a system, and the method includes steps S601 to S614. Steps S601 to S605 are the same as steps S501 to S505 shown in fig. 9, and are not described again here. The following describes a different part from the step shown in fig. 9.
S606, the access network equipment forwards the access network equipment forwarding message to the network selection network element.
Steps S604-S606 correspond to step S403.
S607, the network selection network element decapsulates the access network device forwarding message to obtain a relay node message or a proxy terminal device message, and then decapsulates the relay node message or the proxy terminal device message obtained by decapsulation.
And S608, if the proxy terminal equipment message is unpacked, and the terminal equipment identity information is obtained, performing S609, and if the relay node message is unpacked, and the relay node identity information is obtained, performing S612.
And S609, the network selection network element acquires the subscription information of the terminal equipment from the user database according to the identity information of the terminal equipment, and judges the core network to which the terminal equipment belongs according to the subscription information of the terminal equipment.
Steps S607 to S609 correspond to step S405.
S610, the network selection network element forwards the proxy terminal equipment message to first core network equipment corresponding to a core network to which the terminal equipment belongs.
This step corresponds to step S406.
S611, the first core network device analyzes the proxy terminal device message to obtain the terminal device identity information, and the first core network device performs subsequent processing on the proxy terminal device message.
Optionally, the first core network device may further analyze the proxy terminal device message to obtain access side information, and store the access side information in a local context for addressing the terminal device during downlink addressing, or store the access side information in the node management module for managing the relay node and the location thereof by the node management module.
Optionally, the first core network device may further parse the proxy terminal device message to obtain a terminal device access identifier, and store the terminal device access identifier in a local context for addressing the terminal device during downlink addressing.
Optionally, the first core network device may send the identity information of the end device to the corresponding server.
This step corresponds to step S408.
And S612, the network selection network element queries the user database according to the identity information of the relay node to acquire the subscription information of the relay node, and the network selection network element judges the core network to which the relay node belongs according to the subscription information of the relay node.
S613, the network selection network element forwards the relay node message to the first core network device corresponding to the core network to which the relay node belongs.
And S614, the first core network equipment analyzes the relay node message to obtain the relay node identity information, and performs subsequent processing on the relay node message.
Optionally, the first core network device may send the relay node identity information to a corresponding server.
In the indirect communication method provided by the embodiment of the invention, after a relay node receives a terminal device message of a terminal device, the relay node simulates the terminal device message to construct a proxy terminal device message, wherein the proxy terminal device message contains terminal device identity information, when forwarding is carried out, a network selection network element queries a user database according to the terminal device identity information in the proxy terminal device message to obtain subscription information of the terminal device, judges a core network to which the proxy terminal device message belongs according to the subscription information of the terminal device, then sends the proxy terminal device message to a corresponding first core network device, and carries out subsequent processing on the proxy terminal device message by the first core network device, so that a network side can identify the identity information of the terminal device and carry out corresponding processing; when the relay node sends signaling or data for service, the relay node constructs a relay node message according to the relay node identity information, wherein the relay node message indicates that the encapsulated content is the signaling or data for service sending of the relay node, when forwarding is carried out, a network selection network element queries a user database according to the relay node identity information in the relay node message to obtain subscription information of the relay node, judges a core network to which the relay node belongs according to the subscription information of the relay node, then sends the relay node message to corresponding first core network equipment, and carries out subsequent processing on the relay node message by the first core network equipment, so that a network side can identify the identity information of the relay node and carry out corresponding processing. And then can carry on the differentiation management to the signalling or data that terminal equipment message and relay node oneself carry on the business and send, have solved the terminal equipment and cut in the network with the identity of the relay node, make the problem of the terminal equipment of network side unable discernment, and can support and send terminal equipment identity information and relay node identity information to the server that different core networks correspond.
The present invention provides an indirect communication method, which is applied to the downlink addressing process shown in fig. 6 and 7, and as shown in fig. 11, the method includes:
s701, the first core network equipment receives downlink data.
The downstream data may come from a server.
S702, the first core network equipment generates a downlink terminal equipment message according to the downlink data and the local context.
The local context comprises relay node identity information, terminal equipment identity information, access side information and a terminal equipment access identifier, and the downlink terminal equipment message comprises downlink data, relay node identity information and the terminal equipment access identifier.
When the local context is uplink data transmission in steps S211 and S311, the first core network device obtains the local context according to the relay node identity information, the terminal device identity information, the access side information, and the terminal device access identifier in the terminal device message or the proxy terminal device message.
And S703, the first core network equipment sends the downlink terminal equipment message to the network selection equipment.
S704, the network selection equipment receives the downlink terminal equipment message.
S705, the network selection device encapsulates the downlink terminal device message in the downlink relay node message according to the relay node identity information in the downlink terminal device message.
And S706, the network selection equipment sends the downlink relay node message to the relay node.
Optionally, the network selection device sends the relay node message to the relay node through the access network device.
And S707, the relay node receives the downlink relay node message.
S708, the relay node analyzes the downlink relay node message to obtain a downlink terminal device message and a terminal device access identifier, and finds the corresponding terminal device according to the terminal device access identifier in the downlink terminal device message.
And S709, the relay node sends the downlink terminal equipment message to the corresponding terminal equipment.
According to the indirect communication method provided by the embodiment of the invention, after downlink data reaches first core network equipment, the first core network equipment generates downlink terminal equipment information according to the downlink data and local context stored in an uplink data transmission process, a network selection network element encapsulates the downlink terminal equipment information in the relay node information according to the relay node identity information in the downlink terminal equipment information and forwards the downlink terminal equipment information to a relay node through access network equipment, the relay node analyzes the downlink relay node information, corresponding terminal equipment is found according to a terminal equipment access identifier in the downlink terminal equipment information, and finally the downlink terminal equipment information is sent to the corresponding terminal equipment, so that the relay node and the terminal equipment are addressed by the downlink data with help of the local context established in the uplink direction, and downlink indirect communication is realized.
The present invention provides an indirect communication method, which is applied to the downlink addressing process shown in fig. 9 and 10, and as shown in fig. 12, the method includes:
s801, the first core network device receives downlink data.
The downstream data may come from a server.
S802, the first core network equipment generates a downlink terminal equipment message according to the downlink data and the local context.
The local context comprises terminal equipment identity information and a terminal equipment access identifier, and the downlink terminal equipment message comprises downlink data, the terminal equipment identity information and the terminal equipment access identifier.
Optionally, the local context may further include access side information of the relay node.
Optionally, the downlink terminal device message may further include access side information of the relay node.
When the local context is uplink data transmission in steps S511 and S611, the first core network device obtains the local context according to the terminal device identity information, the access side information, and the terminal device access identifier in the terminal device message or the proxy terminal device message.
And S803, the first core network equipment sends the downlink terminal equipment message to the network selection equipment.
S804, the network selection equipment receives the downlink terminal equipment message.
And S805, the network selection equipment carries out downlink addressing according to the terminal equipment identity information in the downlink terminal equipment message to find the corresponding relay node.
Optionally, the network selection device performs downlink addressing according to the access side information of the relay node in the downlink terminal device message to find the corresponding relay node.
And S806, the network selection equipment sends the downlink terminal equipment message to the corresponding relay node.
Optionally, the network selection device sends the terminal device message to the corresponding relay node through the access network device.
And S807, the corresponding relay node receives the downlink terminal equipment message.
And S808, the corresponding relay node analyzes the downlink terminal equipment message, and finds the corresponding terminal equipment according to the terminal equipment access identification in the downlink terminal equipment message.
Optionally, the corresponding relay node may also find the context in the relay node according to the terminal device identity information in the downlink terminal device message, so as to find the corresponding terminal device access identifier, and find the corresponding terminal device according to the terminal device access identifier.
And S809, the relay node sends the downlink terminal equipment message to the corresponding terminal equipment.
According to the indirect communication method provided by the embodiment of the invention, after downlink data reaches first core network equipment, the first core network equipment generates downlink terminal equipment information according to the downlink data and local context stored in an uplink data transmission process, network selection equipment carries out downlink addressing according to terminal equipment identity information in the downlink terminal equipment information to find a corresponding relay node, the relay node analyzes the downlink terminal equipment information, finds corresponding terminal equipment according to a terminal equipment access identifier in the downlink terminal equipment information, and finally sends the downlink terminal equipment information to the corresponding terminal equipment, so that the relay node and the terminal equipment are addressed by the downlink data with help of the local context established in the uplink direction, and downlink indirect communication is realized.
The following describes the indirect communication method shown in fig. 7 with a specific signaling flow of a terminal device attach procedure, and with reference to fig. 13, the method includes:
s901, the relay node firstly accesses to the network, and broadcasts the PLMN (public land mobile network, Chinese) and Cell id (Cell identity) of the relay node at the downward air interface side.
For the air interface of the non-3 GPP protocol, the relay node broadcasts the relay node ID, such as a bluetooth identifier in the bluetooth protocol, an SSID (service set identifier in english, and service set identifier in chinese) in the WiFi protocol, and so on.
And S902, the terminal equipment selects a terminal side air interface of the relay node to initiate air interface access according to a certain network selection strategy (such as power saving).
For an air interface of a non-3 GPP protocol, for example, an air interface in a bluetooth protocol or a WiFi protocol, the terminal device and the relay node perform a mutual authentication process and key agreement.
S903, the terminal device constructs a terminal device NAS (non-access-stratum, Chinese full name: non-access stratum) message, and the NAS message is transmitted to the relay node as data through an indirect (index, for example, Bluetooth/WiFi/3 GPP).
For example, the terminal device NAS message may include, for example, an attach request (hereinafter, referred to as "attach request") message, and the delivered terminal device NAS message includes terminal device identity information, such as a terminal device ID.
S904, the relay node encapsulates the terminal equipment NAS message in the relay node NAS message, transmits the relay node NAS message to an eNodeB in a cellular network through an eNodeB air interface, and indicates the relay node NAS message to encapsulate the content as the terminal equipment NAS message in the relay node NAS message.
The indication may be performed by a customized relay node signaling message, for example, by using a relay node NAS message, or by using a newly added information element in an existing relay node NAS message, and the content indicating the encapsulation may include a terminal device NAS message and a terminal device ID.
The purpose of indicating the relay node NAS message encapsulation content in the relay node NAS message as the terminal equipment NAS message is to distinguish the terminal equipment NAS message from the relay node NAS message sent by the service of the relay node.
This step corresponds to steps S302 and S304.
S905, the access network equipment eNodeB encapsulates the relay node NAS message into an S1AP message (English full name: S1 application protocol, Chinese full name: S1 application protocol), and the message is used as access network equipment forwarding message and sent to the network selection equipment.
This step corresponds to steps S305 and S306.
S906, when the relay node sends signaling or data by service, the relay node constructs a relay node NAS message according to the identity information of the relay node and sends the NAS message to the access network equipment eNodeB.
The NAS message indicates that the encapsulated content is signaling or data sent by the relay node for service.
S907, the access network equipment eNodeB forwards the relay node NAS message to a network selection network element.
S908, the network selection device decapsulates the S1AP to obtain a relay node NAS message therein, and determines according to the encapsulated content indicated by the decapsulated relay node NAS message, if the decapsulated relay node NAS message indicates an encapsulated content terminal device NAS message, the step S909 is performed, and if the decapsulated relay node NAS message is a relay node NAS message in which the relay node itself performs service transmission, the step S911 is performed:
this step corresponds to step S307.
S909, if the decapsulated NAS message indicates a terminal device NAS message with encapsulated content, the network selection device parses the NAS message to obtain a terminal device NAS message, then parses the terminal device NAS message to obtain terminal device identity information (for example, a terminal device ID), and selects a corresponding M-IoT Core according to the terminal device identity information.
Specifically, there may be two ways S9091 and S9092:
s9091, the network selection device searches a locally configured strategy according to the device access (device access) ID in the relay node NAS message to select the Core network M-IoT Core.
S9092, the network selection device obtains the subscription information of the terminal device (only obtaining the subscription information related to the M-IoT Core) from a user database HSS (full name in english: home subscriber server) according to the terminal device identity information ID (e.g. IMSI/GUTI/TMSI, etc.) in the terminal device NAS message encapsulated in the relay node NAS message, so as to select the Core network M-IoT Core.
Here, only the terminal device IMSI in the first terminal device NAS message (without encryption) needs to be acquired, and the mapping relationship between the terminal device IMSI, the device access ID, and the selected M-IoT Core is stored in the local context for forwarding use of the subsequent NAS message (at this time, only the device access ID in the outer relay node NAS needs to be identified).
Meanwhile, the network selection device acquires RAN side information (such as TAI (total name of tracking area identity, chinese total name: tracking area identity)/CGI (total name of cell global identity, chinese total name: cell global identity), a relay node ID (authentication may be performed first), a terminal device ID, and the like) from the S1-AP and the UE NAS, adds the information in a terminal device NAS message header, and forwards the terminal device NAS message to the M-IoT Core for processing.
Step S909 corresponds to steps S308 and S309.
S910, the network selection device adds the relay node identity information and the terminal device identity information to the terminal device NAS message, and sends the terminal device NAS message to the corresponding first Core network device M-IoT Core.
This step corresponds to step S310.
And S911, after the first Core network equipment M-IoT Core receives the terminal equipment NAS message, the corresponding authentication/authorization/security flow is completed, and the attachment process is completed. Meanwhile, the obtained relay node identity information, TAI, CGI, and terminal device identity information (e.g. terminal device ID, such as bluetooth identifier, MAC (media access control), etc.) are stored in the local context for addressing the relay node during downlink addressing.
This step corresponds to step S311.
And S912, if the relay node NAS message obtained by de-encapsulation is a relay node NAS message sent by the relay node for service, the network selection equipment selects the first core network equipment for message distribution.
This step corresponds to steps S312-S315, which are not described in detail herein.
The indirect communication method provided by the embodiment of the invention encapsulates the terminal equipment NAS message in the relay node NAS message through the relay node, indicates the encapsulated content of the relay node NAS message as the terminal equipment NAS message in the relay node NAS message, then judges according to the encapsulated content indicated by the relay node NAS message obtained by de-encapsulation by the network selection equipment, analyzes the relay node NAS message to obtain the terminal equipment NAS message if the relay node NAS message obtained by de-encapsulation indicates the encapsulated content terminal equipment NAS message, then analyzes the terminal equipment NAS message to obtain the terminal equipment identity information, and obtains the signing information of the terminal equipment from the user database HSS according to the terminal equipment identity information so as to select the first Core network equipment M-IoT Core and send the terminal equipment NAS message to the corresponding first Core network equipment M-IoT Core, the first core network device can acquire the identity information of the terminal device through the terminal device NAS message, and the problem that the terminal device can not be identified by a network side due to the fact that the terminal device is accessed to the network through the identity of the relay node is solved.
The indirect communication method shown in fig. 7 is described below with a terminal device initiating an uplink MO (mobile authorized, chinese full name: mobile originating call) service flow, and with reference to fig. 14, the method includes:
s1001, the terminal device encapsulates the MO service data in a terminal device NAS message (data service request), and transmits the data to the relay node through an indirect air interface.
S1002, the relay node encapsulates the terminal equipment NAS message in the relay node NAS message, sequentially transmits the relay node NAS message to the eNodeB and the network selection equipment for processing, and the network selection equipment sends the relay node NAS message to the corresponding first Core network equipment M-IoT Core.
The processing flow of step S1002 is similar to the processing flow in steps S904-S910 in the terminal device attaching process, and is not described herein again.
S1003, the first Core network equipment M-IoT Core analyzes the service data encapsulated in the terminal equipment NAS message, encapsulates the service data according to a certain protocol and then sends the encapsulated service data to the application server.
In the indirect communication method provided by the embodiment of the invention, the terminal equipment NAS message is encapsulated in the relay node NAS message by the relay node and is sequentially transmitted to the eNodeB and the network selection equipment for processing, the network selection equipment sends the message to the corresponding M-IoT Core, and the M-IoT Core analyzes the service data encapsulated in the terminal equipment NAS message, so that the first Core network equipment can process the data in the uplink terminal equipment NAS message.
The following describes a process of addressing a terminal device in a downlink direction as described in steps in fig. 6, 7, 9, 10 and 11 by using a downlink MT (mobile terminated, chinese) service flow, and referring to fig. 15, the method includes:
s1101, the application server initiates MO service data (carrying an external device ID), and transmits the MO service data to the first Core network device M-IoT Core.
And S1102, after protocol decapsulation processing is carried out on the M-IoT Core, acquiring relay node identity information (a relay node ID) according to the local context, and inquiring access side information TAI/CGI (to solve the problem of relay node movement) of the relay node according to the local context or from a user database (HSS). And encapsulating the MT service data in a downlink terminal equipment NAS message and sending the message to the network selection equipment.
The downlink terminal equipment NAS message carries cells such as a relay node ID, a TAI/CGI, a terminal equipment ID and the like.
This step corresponds to steps S702 and S703.
S1103, the network selection device encapsulates the terminal device NAS in a relay node NAS message or S1AP according to the relay node identity information (relay node ID), TAI/CGI, and transmits the message to the access network device eNodeB.
If the relay node is in an idle state (can be judged according to the S1 interface state), the network selection equipment firstly initiates a paging message, and then issues a relay node NAS message or S1AP containing MT data after the relay node responds.
And S1104, the NodeB serving as access network equipment transmits the relay node NAS message to the relay node.
Steps S1103 and S1104 correspond to steps S705 and S706.
S1105, the relay node corresponds the terminal equipment identity information (such as the terminal equipment ID) in the terminal equipment NAS message analyzed in the relay node NAS message to the locally reserved terminal equipment identity information, and then the analyzed terminal equipment NAS message is downloaded to the corresponding terminal equipment.
If the terminal equipment is in an idle state or the relay node does not have the terminal equipment identity information at the moment, the eNodeB initiates paging or recoupling connection, and after the terminal equipment is connected to the relay node, the relay node issues a terminal equipment NAS message containing MT data.
This step corresponds to steps S708 and S709.
In the indirect communication method provided by the embodiment of the present invention, the application server initiates MO service data, transmits the MO service data to the first Core network device M-IoT Core, performs protocol decapsulation processing by the M-IoT Core, acquires relay node identity information (relay node ID) according to a local context, and queries TAI/CGI information where the relay node is located (to solve the problem of relay node mobility) according to the local context or from a user database HSS. The method comprises the steps that MT service data are packaged in a downlink terminal equipment NAS message and are issued to network selection equipment, the network selection equipment packages the terminal equipment NAS in a relay node NAS message according to relay node identity information and transmits the relay node NAS message to a relay node through an access network equipment eNodeB, the relay node finds corresponding terminal equipment according to the terminal equipment identity information in the terminal equipment NAS message analyzed in the relay node NAS message, and then the analyzed terminal equipment NAS message is issued to the corresponding terminal equipment, so that the terminal equipment is addressed by using context when data are transmitted in the downlink direction.
The following describes the indirect communication method shown in fig. 10 with a specific signaling flow of a terminal device attachment process, and referring to fig. 16, the method includes steps S1201-S1211, where steps S1201-S1203 are respectively the same as steps S901-S903 shown in fig. 13, and are not described again here. The following describes a different part from the step shown in fig. 13.
S1204, after receiving the terminal equipment NAS message, the relay node analyzes the terminal equipment NAS message to obtain the content (attachment request) of the terminal equipment NAS message, constructs an agent terminal equipment NAS message according to the content (attachment request) of the terminal equipment NAS message to initiate a message with the identity of the terminal equipment, and transmits the message to an access network equipment eNodeB in the cellular network through an air interface of the network selection equipment eNodeB.
This step corresponds to steps S602 and S604.
And S1205, when the relay node sends signaling or data to the service, the relay node constructs a relay node NAS message according to the identity information of the relay node and sends the NAS message to the access network equipment eNodeB.
The NAS message indicates that the encapsulated content is signaling or data sent by the relay node for service.
This step is the same as step S905, and corresponds to step S603.
S1206, the access network equipment eNodeB encapsulates the relay node NAS message into an S1AP message (English full name: S1 application protocol, Chinese full name: S1 application protocol), and sends the access network equipment forwarding message to the network selection equipment.
This step is the same as step S906, and corresponds to steps S605 and S606.
S1207, the network selection device decapsulates S1AP, and if the obtained proxy relay node NAS message is decapsulated, proceeds to step S1208, and if the obtained relay node NAS message is decapsulated, proceeds to step S1210.
This step is the same as step S907, and corresponds to step S607.
S1208, if the proxy relay node NAS message is obtained by decapsulation, the network selection device parses the proxy relay node NAS message to obtain terminal device identity information (e.g., a terminal device ID), and selects a corresponding M-IoT Core according to the terminal device identity information.
Specifically, there may be two ways S12081 and S12082:
s12081, the network selection equipment searches a locally configured strategy to select the M-IoT Core according to the equipment access (device access) ID in the proxy relay node NAS message.
S12082, the network selection device obtains the subscription information of the terminal device from a user database (HSS) (the HSS) according to the terminal device ID (for example, the IMSI (international mobile subscriber identity) encapsulated in the proxy relay node NAS message), the network selection device selects the M-IoT according to the IMSI (international mobile subscriber identity) encapsulated in the proxy relay node NAS message, the GUTI (the IMSI (international mobile subscriber identity) encapsulated in the proxy relay node NAS message, the TMSI (the IMSI) encapsulated in the IMSI encapsulated in the proxy relay node NAS message, the HSS (the IMSI) encapsulated in the IMSI encapsulated in the proxy relay node NAS message, the TMSI, and the HSI (the IMSI) (only the subscription information of which part is related to the M-IoT identity) are obtained), and the M-IoT is selected.
Here, only the first terminal device IMSI needs to be acquired, and the mapping relationship between the terminal device IMSI, the device access ID, and the selected M-IoT Core is stored in the local context for forwarding use of the subsequent NAS message (at this time, only the device access ID in the outer relay node NAS needs to be identified).
Meanwhile, the network selection device acquires RAN side information (such as TAI (total name of tracking area identity, chinese) from the S1-AP and the UE NAS), a relay node ID (authentication may be performed first), a terminal device ID, and the like, adds the information to a proxy relay node NAS message header, and forwards the proxy relay node NAS message to the M-IoT Core for processing.
Step S1208 corresponds to steps S608 and S609.
S1209, the network selection device sends the proxy terminal device NAS message to the corresponding M-IoT Core.
This step corresponds to steps S610-S611.
And S1210, after the M-IoT Core receives and analyzes the NAS message of the proxy terminal equipment, completing a corresponding authentication/authorization/security flow and completing an attachment process. Meanwhile, the obtained relay node identity information, TAI, CGI, and terminal device identity information (e.g. terminal device ID, such as bluetooth identifier, MAC (media access control), etc.) are stored in the local context for addressing the relay node during downlink addressing.
This step corresponds to step S612.
And S1211, if the relay node NAS message is obtained through de-encapsulation, the network selection equipment distributes the message.
This step corresponds to steps S613 to S616 and will not be described in detail herein.
In the indirect communication method provided by the embodiment of the invention, after receiving the terminal equipment NAS message, the relay node analyzes the terminal equipment NAS message to obtain the content of the terminal equipment NAS message, constructs the proxy terminal equipment NAS message according to the content of the terminal equipment NAS message to simulate the identity initiating message of the terminal equipment, the network selection equipment analyzes the proxy relay node NAS message to obtain the identity information of the terminal equipment, acquires the subscription information of the terminal equipment from the user database HSS according to the identity information of the terminal equipment and selects the M-IoT Core, the M-IoT Core analyzes the proxy terminal equipment NAS message to obtain the identity information of the terminal equipment, so that the first Core network equipment M-IoT Core can acquire the identity information of the terminal equipment through the terminal equipment NAS message, and the problem that the terminal equipment is accessed to a network by the identity of the relay node is solved, so that the network side cannot identify the terminal equipment.
The indirect communication method shown in fig. 10 is described below with a terminal device initiating an uplink MO (mobile authorized, chinese full name: mobile originating call) service flow, and as shown in fig. 17, the method includes:
s1301, the terminal device encapsulates the MO service data in a terminal device NAS message (data service request), and transmits the data to the relay node through an indirect air interface.
S1302, after receiving the terminal device NAS message, the relay node analyzes the terminal device NAS message to obtain content (MO service data) of the terminal device NAS message, constructs a proxy terminal device NAS message according to the content (MO service data) of the terminal device NAS message to initiate a message with the identity of the terminal device, sequentially transmits the message to the eNodeB and the network selection device to be processed, and sends the message to the corresponding M-IoT Core by the network selection device.
The processing flow of step S1302 corresponds to the steps in the terminal device attaching process. The processing flows in S1204-S1210 are similar, except that the content of the NAS message of the terminal device is MO service data, which is not described herein again.
And S1303, the M-IoT Core analyzes the service data encapsulated in the NAS message of the proxy terminal equipment, encapsulates the service data by a certain protocol and then sends the encapsulated service data to the application server.
In the indirect communication method provided by the embodiment of the invention, the terminal device encapsulates the MO service data in the terminal device NAS message, the relay node analyzes the terminal device NAS message after receiving the terminal device NAS message to obtain the content (MO service data) of the terminal device NAS message, constructs the proxy terminal device NAS message according to the content (MO service data) of the terminal device NAS message to initiate the message with the identity of the terminal device, and sequentially transmits the message to the eNodeB and the network selection device for processing, and the network selection device transmits the message to the corresponding M-IoT Core, so that the M-IoT Core analyzes the service data encapsulated in the proxy terminal device NAS message, and the first Core network device can process the data in the uplink terminal device NAS message.
The above-mentioned scheme provided by the embodiment of the present invention is introduced mainly from the perspective of interaction between network elements. It will be appreciated that each network element, such as the relay node and the network selection device, etc., comprises corresponding hardware structures and/or software modules for performing each function in order to implement the above functions. Those of skill in the art will readily appreciate that the present invention can be implemented in hardware or a combination of hardware and computer software, with the exemplary elements and algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiment of the present invention, functional modules of the relay node, the network selection device, and the like may be divided according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, the division of the modules in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.
In the case of dividing each functional module by corresponding functions, fig. 18 shows a schematic diagram of a possible structure of the relay node involved in the above embodiment, and the relay node 12 includes: a packaging unit 1211, a communication unit 1212, and a parsing unit 1213. The encapsulation unit 1211 is configured to support the relay node 12 to perform the process S102 in fig. 5, the processes S202 and S203 in fig. 6, the processes S302 and S303 in fig. 7, the process S402 in fig. 8, the processes S502 and S503 in fig. 9, the processes S602 and S603 in fig. 10, the process S904 in fig. 13, and the process S1002 in fig. 14; the communication unit 1212 is configured to support the relay node 12 to perform processes S101 and S103 in fig. 5, processes S202 and S204 in fig. 6, processes S302 and S304 in fig. 7, processes S401 and S403 in fig. 8, processes S502 and S504 in fig. 9, processes S602 and S604 in fig. 10, processes S707 and S709 in fig. 11, processes S807 and S809 in fig. 12, process S904 in fig. 13, process S1002 in fig. 14, process S1105 in fig. 15, and process S1205 in fig. 16; the parsing unit 1213 is configured to support the relay node 12 to perform the process S708 in fig. 11, the process S808 in fig. 12, the process S1105 in fig. 15, the process S1204 in fig. 16, and the process S1302 in fig. 17. All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.
In case of using integrated units, fig. 19 shows a possible structural diagram of the relay node involved in the above embodiment. The relay node 12 includes: a processing module 1222 and a communication module 1223. The processing module 1222 is configured to control and manage actions of the relay node, for example, the processing module 1222 is configured to support the relay node 12 to perform the processes S102 in fig. 5, the processes S202 and S203 in fig. 6, the processes S302 and S303 in fig. 7, the process S402 in fig. 8, the processes S502 and S503 in fig. 9, the processes S602 and S603 in fig. 10, the process S904 in fig. 13, the process S1002 in fig. 14, the process S708 in fig. 11, the process S808 in fig. 12, the process S1105 in fig. 15, the process S1204 in fig. 16, the process S1302 in fig. 17, and/or other processes for the technologies described herein. The communication module 1223 is used to support communication between the relay node 12 and other network entities, for example, the functional modules or network entities shown in fig. 1, fig. 3, and fig. 4. The relay node 12 may also include a storage module 1221 for storing program codes and data for the relay node.
The processing module 1222 may be a Processor or a controller, such as a Central Processing Unit (CPU), a general purpose Processor, a Digital Signal Processor (DSP), an application-specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA), other programmable logic devices, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication module 1223 may be a transceiver, a transceiver circuit, a communication interface, or the like. The storage module 1221 may be a memory.
When the processing module 1222 is a processor, the communication module 1223 is a transceiver, and the storage module 1221 is a memory, the relay node according to the embodiment of the present invention may be the relay node shown in fig. 20.
Referring to fig. 20, the relay node 12 includes: a processor 1232, a transceiver 1233, a memory 1231, and a bus 1234. Wherein the transceiver 1233, the processor 1232, and the memory 1231 are connected to each other through a bus 1234; the bus 1234 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 20, but this is not intended to represent only one bus or type of bus.
In the case of dividing each functional module by corresponding functions, fig. 21 shows a schematic diagram of a possible structure of the network selection device according to the foregoing embodiment, and the network selection device 14 includes: an acquisition unit 1411, a communication unit 1412, a judgment unit 1413, a decapsulation unit 1414 and an encapsulation unit 1415. The obtaining unit 1411 is configured to support the network selection device 14 to execute the process S105 in fig. 5, the process S405 in fig. 8, the process S805 in fig. 12, the process S909 in fig. 13, and the process S1209 in fig. 16; the communication unit 1412 is configured to support the network selection device 14 to execute the processes S104 and S106 in fig. 5, the processes S210 and S214 in fig. 6, the processes S310 and S314 in fig. 7, the processes S304 and S306 in fig. 8, the processes S510 and S513 in fig. 9, the processes S610 and S613 in fig. 10, the processes S704 and S706 in fig. 11, the processes S804 and S806 in fig. 12, the process S910 in fig. 13, the process S1103 in fig. 15, and the process S1210 in fig. 16; the determination unit 1413 is configured to support the network selection device 14 to execute the processes S207, S209, and S213 in fig. 6, the processes S307, S309, and S313 in fig. 7, the processes S507, S509, and S513 in fig. 9, the processes S607, S609, and S613 in fig. 10, the process S908 in fig. 13, and the process S1208 in fig. 16; the decapsulating unit 1414 is configured to support the network selection device 14 to perform the processes S208 and S212 in fig. 6, the processes S308 and S312 in fig. 7, the processes S508 and S512 in fig. 9, the processes S608 and S612 in fig. 10, the process S908 in fig. 13, and the process S1208 in fig. 16; the encapsulating unit 1415 is configured to support the network selection device 14 to perform the process S705 in fig. 11, the process S910 in fig. 13, the process S1103 in fig. 15, and the process S1210 in fig. 16. All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.
In the case of an integrated unit, fig. 22 shows a schematic diagram of a possible structure of the network selection device involved in the above-described embodiment. The network selection device 14 includes: a processing module 1422 and a communications module 1423. The processing module 1422 is configured to control and manage the operation of the network selection device, for example, the processing module 1422 is configured to support the network selection device to execute the process S105 in fig. 5, the process S405 in fig. 8, the process S805 in fig. 12, the process S909 in fig. 13, the process S1209 in fig. 16, the processes S207, S209, and S213 in fig. 6, the processes S307, S309, and S313 in fig. 7, the processes S507, S509, and S513 in fig. 9, the processes S607, S609, and S613 in fig. 10, process S908 in fig. 13, process S1208 in fig. 16, processes S208 and S212 in fig. 6, processes S308 and S312 in fig. 7, processes S508 and S512 in fig. 9, processes S608 and S612 in fig. 10, process S908 in fig. 13, process S1208 in fig. 16, process S705 in fig. 11, process S910 in fig. 13, process S1003 in fig. 15, process S1210 in fig. 16, and/or other processes for the techniques described herein. The communication module 1423 is used to support communication of the network selection device with other network entities, such as the functional modules or network entities shown in fig. 1, 2, or 4. The network selection device may also include a storage module 1421 for storing program codes and data for the network selection device.
The processing module 1422 may be a processor or controller, such as a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication module 1423 may be a transceiver, a transceiving circuit, a communication interface, or the like. The memory module 1421 may be a memory.
When the processing module 1422 is a processor, the communication module 1423 is a communication interface, and the storage module 1421 is a memory, the network selection device according to the embodiment of the present invention may be the network selection device shown in fig. 23.
Referring to fig. 23, the network selection device 14 includes: a processor 1432, a communication interface 1433, a memory 1431, and a bus 1434. Wherein the communication interface 1433, the processor 1432, and the memory 1431 are connected to each other through a bus 1434; the bus 1434 may be a peripheral component interconnect standard bus or an extended industry standard architecture bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 23, but it is not intended that there be only one bus or one type of bus.
In the case of adopting the functional modules divided for the respective functions, fig. 24 shows a schematic diagram of a possible structure of the first core network device according to the foregoing embodiment, where the first core network device 15 includes: a communication unit 1511, a processing unit 1512. The communication unit 1511 is configured to support the first core network device 15 to execute the process S107 in fig. 5, the processes S701 and S703 in fig. 11, the processes S801 and S803 in fig. 12, the process S911 in fig. 13, the process S1003 in fig. 14, the process S1102 in fig. 15, and the process S1303 in fig. 17; the processing unit 1512 is configured to support the first core network device 15 to execute the process S108 in fig. 5, the processes S211 and S215 in fig. 6, the processes S311 and S315 in fig. 7, the process S408 in fig. 8, the processes S511 and S514 in fig. 9, the processes S611 and S614 in fig. 10, the process S702 in fig. 11, the process S802 in fig. 12, the process S911 in fig. 13, the process S1003 in fig. 14, the process S1102 in fig. 15, the process S1210 in fig. 16, and the process S1303 in fig. 17. All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.
In the case of an integrated unit, fig. 25 shows a schematic diagram of a possible structure of the first core network device involved in the above-described embodiment. The first core network device 15 includes: a processing module 1522 and a communication module 1523. The processing module 1522 is configured to control and manage an action of the first core network device, for example, the processing module 1522 is configured to support the first core network device to execute the process S108 in fig. 5, the processes S211 and S215 in fig. 6, the processes S311 and S315 in fig. 7, the process S408 in fig. 8, the processes S511 and S514 in fig. 9, the processes S611 and S614 in fig. 10, the process S702 in fig. 11, the process S802 in fig. 12, the process S911 in fig. 13, the process S1003 in fig. 14, the process S1102 in fig. 15, the process S1210 in fig. 16, the process S1303 in fig. 17, and/or other processes for the technology described herein. The communication module 1523 is configured to support communication between the first core network device and other network entities, for example, the functional modules or network entities shown in fig. 1, fig. 2, or fig. 3. The first core network device may further comprise a storage module 1521 for storing program codes and data of the first core network device.
The processing module 1522 may be a processor or controller, such as a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication module 1523 may be a transceiver, a transceiving circuit or a communication interface, etc. The storage module 1521 may be a memory.
When the processing module 1522 is a processor, the communication module 1523 is a communication interface, and the storage module 1521 is a memory, the first core network device according to the embodiment of the present invention may be the first core network device shown in fig. 26.
Referring to fig. 26, the first core network device 15 includes: a processor 1532, a communication interface 1533, a memory 1531, and a bus 1534. Among them, the communication interface 1533, the processor 1532, and the memory 1531 are connected to each other through a bus 1534; the bus 1534 may be a peripheral component interconnect standard bus or an extended industry standard architecture bus or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 26, but this does not indicate only one bus or one type of bus.
The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may be composed of corresponding software modules, and the software modules may be stored in a Random Access Memory (RAM), a flash memory, a Read Only Memory (ROM), an Erasable Programmable Read Only Memory (EPROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a register, a hard disk, a removable hard disk, a compact disc read only memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may reside in a core network interface device. Of course, the processor and the storage medium may reside as discrete components in a core network interface device.
The technical scheme provided by the embodiment of the invention is not limited in the fields of 5G Massive IoT and 4G NB-IoT, and can also be applied in the industrial field, in particular to an application scenario that an ARPU (all English: average revenue per user) value is low, the power saving requirement is required, the number of terminal devices is huge, the terminal management requirement is required, and the relay node has certain control capability.
It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (34)

1. An indirect communication method, the method comprising:
the method comprises the steps that a relay node receives a terminal device message from a terminal device, wherein the terminal device message comprises terminal device identity information;
the relay node encapsulates the terminal equipment message in a relay node message, and indicates that the encapsulated content is the terminal equipment message in the relay node message;
the relay node forwards the relay node message to a network selection device through an access network device, the relay node message is used for determining a core network to which the terminal device belongs by the network selection device according to terminal device identity information in the relay node message, the network selection device sends the terminal device message to a first core network device corresponding to the core network to which the terminal device belongs, and the corresponding first core network device performs subsequent processing on the terminal device message.
2. The method of claim 1, wherein:
the relay node message further includes relay node identity information, the relay node identity information is used for the network selection device to add the relay node identity information to the terminal device message to generate a new terminal device message and send the new terminal device message to the first core network device, the first core network device stores the relay node identity information and the terminal device identity information in the new terminal device message in a local context for addressing the terminal device during downlink addressing, or stores the relay node and the terminal device identity information in a node management module for managing the relay node and the position where the relay node is located by the node management module.
3. The method of claim 1, wherein:
the relay node message further includes access side information, the access side information is used for the network selection device to add the access side information to the terminal device message, the first core network device analyzes the terminal device message to obtain the access side information, the first core network device stores the access side information in a local context for addressing the terminal device during downlink addressing, or stores the access side information in a node management module for managing the relay node and the position thereof by the node management module.
4. The method of claim 1, wherein:
the relay node message also contains a terminal device access identifier, the terminal device access identifier is used for being added to the terminal device message by the network selection device, the terminal device message is analyzed by the first core network device to obtain the terminal device access identifier, and the terminal device access identifier is stored in a local context by the first core network device and used for addressing the terminal device during downlink addressing.
5. The method of claim 1, further comprising:
the relay node receives a downlink relay node message, wherein the downlink relay node message is formed by encapsulating a downlink terminal equipment message from the first core network equipment according to relay node identity information in the downlink terminal equipment message, the downlink terminal equipment message is generated by the first core network equipment according to downlink data and a local context, the local context comprises relay node identity information and a terminal equipment access identifier, and the downlink terminal equipment message comprises the downlink data, the relay node identity information and the terminal equipment access identifier;
the relay node analyzes the downlink relay node message to obtain a downlink terminal equipment message and a terminal equipment access identifier, and finds out corresponding terminal equipment according to the terminal equipment access identifier;
and the relay node sends the downlink terminal equipment message to the corresponding terminal equipment.
6. An indirect communication method, the method comprising:
the method comprises the steps that network selection equipment receives a relay node message forwarded by a relay node through access network equipment, wherein the relay node message encapsulates a terminal equipment message from terminal equipment, and indicates that the encapsulated content is the terminal equipment message in the relay node message, wherein the terminal equipment message comprises terminal equipment identity information;
the network selection equipment determines a core network to which the terminal equipment belongs according to the terminal equipment identity information in the relay node message;
and the network selection equipment sends the terminal equipment message to first core network equipment corresponding to a core network to which the terminal equipment belongs for subsequent processing.
7. The method of claim 6, wherein the determining, by the network selection device, the core network to which the terminal device belongs according to the terminal device identity information in the relay node message comprises:
the network selection equipment judges according to the encapsulation content indicated by the relay node message, when the encapsulation content of the relay node message is a terminal equipment message, the network selection equipment decapsulates the relay node message to obtain the terminal equipment message, the network selection equipment decapsulates the terminal equipment message to obtain the terminal equipment identity information, and the network selection equipment judges the core network to which the terminal equipment belongs according to the terminal equipment identity information.
8. The method according to claim 7, wherein the determining, by the network selection device, the core network to which the terminal device belongs according to the terminal device identity information includes:
and the network selection equipment acquires the subscription information of the terminal equipment from a user database according to the identity information of the terminal equipment, and judges the core network to which the terminal equipment belongs according to the subscription information of the terminal equipment.
9. The method according to claim 6, wherein the network selection device sends the terminal device message to a first core network device corresponding to a core network to which the terminal device belongs, and the subsequent processing of the terminal device message by the corresponding first core network device includes:
if the network selection equipment is core network equipment corresponding to a core network to which the terminal equipment belongs, the network selection equipment performs subsequent processing on the terminal equipment message, otherwise, the network selection equipment forwards the terminal equipment message to first core network equipment corresponding to the core network to which the terminal equipment belongs, and the first core network equipment performs subsequent processing on the terminal equipment message.
10. The method of claim 6, further comprising:
the network selection equipment decapsulates the relay node message to obtain relay node identity information, adds the relay node identity information to the terminal equipment message by the network selection equipment to generate a new terminal equipment message and sends the new terminal equipment message to the first core network equipment, and the first core network equipment stores the relay node identity information and the terminal equipment identity information in the new terminal equipment message in a local context for addressing the terminal equipment during downlink addressing, or stores the relay node identity information and the terminal equipment identity information in a node management module for managing the relay node and the position where the relay node is located by the node management module, wherein the relay node message comprises the relay node identity information.
11. The method of claim 6, further comprising:
the network selection equipment decapsulates the relay node message to obtain access side information, the network selection equipment adds the access side information to the terminal equipment message and sends the access side information to the first core network equipment, and the first core network equipment stores the access side information in the terminal equipment message in a local context for addressing the terminal equipment during downlink addressing, or stores the access side information in a node management module for managing the relay node and the position of the relay node by the node management module.
12. The method of claim 6, further comprising:
the network selection equipment decapsulates the relay node message to obtain a terminal equipment access identifier, the network selection equipment adds the terminal equipment access identifier to the terminal equipment message and sends the terminal equipment access identifier to the first core network equipment, and the first core network equipment stores the terminal equipment access identifier in the terminal equipment message in a local context for addressing the terminal equipment during downlink addressing.
13. The method of claim 6, further comprising:
the network selection equipment receives downlink terminal equipment information, wherein the downlink terminal equipment information is generated by the first core network equipment according to downlink data and a local context, the local context comprises relay node identity information and a terminal equipment access identifier, and the downlink terminal equipment information comprises the downlink data, the relay node identity information and the terminal equipment access identifier;
the network selection equipment encapsulates the downlink terminal equipment message in a downlink relay node message according to the relay node identity information in the downlink terminal equipment message;
the network selection equipment sends the downlink relay node message to the relay node, the downlink relay node message is used for analyzing the downlink relay node message by the relay node to obtain the downlink terminal equipment message and the terminal equipment access identification, the relay node finds the corresponding terminal equipment according to the terminal equipment access identification, and the relay node sends the downlink terminal equipment message to the corresponding terminal equipment.
14. An indirect communication method, the method comprising:
a first core network device receives a terminal device message from a terminal device from a network selection device, wherein the first core network device is a core network device corresponding to a core network to which the terminal device belongs, the core network to which the terminal device belongs is determined for the network selection device according to terminal device identity information in a relay node message, the relay node message is formed by encapsulating the terminal device message by a relay node, and indicates that the encapsulated content is the terminal device message in the relay node message, the relay node message is forwarded to the network selection device by an access network device, and the terminal device message comprises the terminal device identity information;
and the first core network equipment carries out subsequent processing on the terminal equipment message.
15. The method of claim 14, further comprising:
the first core network equipment analyzes a new terminal equipment message to obtain relay node identity information and the terminal equipment identity information, wherein the new terminal equipment message is generated by adding the relay node identity information to the terminal equipment message by the network selection equipment;
the first core network device stores the relay node identity information and the terminal device identity information in a context for addressing the terminal device during downlink addressing, or stores the relay node identity information and the terminal device identity information in a node management module for managing the relay node and the position of the relay node by the node management module.
16. The method of claim 14, further comprising:
the first core network equipment analyzes a new terminal equipment message to obtain access side information, wherein the new terminal equipment message is generated by the network selection equipment by adding the access side information to the terminal equipment message;
the first core network device stores the access side information in a context for addressing the terminal device during downlink addressing, or stores the access side information in a node management module for managing the relay node and the position thereof by the node management module.
17. The method of claim 14, further comprising:
the first core network equipment analyzes a new terminal equipment message to obtain a terminal equipment access identifier, wherein the new terminal equipment message is generated by adding the terminal equipment access identifier to the terminal equipment message by the network selection equipment;
and the first core network equipment stores the terminal equipment access identification in a context for addressing the terminal equipment during downlink addressing.
18. The method of claim 14, further comprising:
the first core network equipment receives downlink data;
the first core network equipment generates downlink terminal equipment information according to the downlink data and a local context, wherein the local context comprises relay node identity information and the terminal equipment access identification, and the downlink terminal equipment information comprises the downlink data, the relay node identity information and the terminal equipment access identification;
the first core network device sends the downlink terminal device message to the network selection device, the downlink terminal device message is used for being encapsulated in a downlink relay node message by the network selection device according to relay node identity information in the downlink terminal device message, the downlink relay node message is analyzed by the relay node to obtain the downlink terminal device message and the terminal device access identifier, the relay node finds the corresponding terminal device according to the terminal device access identifier, and the relay node sends the downlink terminal device message to the corresponding terminal device.
19. An indirect communication method, the method comprising:
a relay node receives a terminal equipment message from terminal equipment, wherein the terminal equipment message comprises terminal equipment identity information;
the relay node analyzes the terminal equipment message to obtain the content of the terminal equipment message, constructs a proxy terminal equipment message according to the content of the terminal equipment message and initiates a message with the identity of the terminal equipment, wherein the proxy terminal equipment message comprises the identity information of the terminal equipment;
the relay node forwards the proxy terminal device message to a network selection device through an access network device, the proxy terminal device message is used for determining a core network to which the terminal device belongs by the network selection device according to terminal device identity information in the proxy terminal device message, the network selection device sends the proxy terminal device message to a first core network device corresponding to the core network to which the terminal device belongs, and the corresponding first core network device performs subsequent processing on the proxy terminal device message.
20. The method of claim 19, further comprising:
the agent terminal device message also contains access side information, and the access side information is used for storing the access side information in a local context by the first core network device for addressing the terminal device during downlink addressing, or storing the access side information in a node management module for managing the relay node and the position thereof by the node management module.
21. The method of claim 19, further comprising:
the proxy terminal device message also contains a terminal device access identifier, and the terminal device access identifier is used for the first core network device to store the terminal device access identifier in a local context for addressing the terminal device during downlink addressing.
22. The method of claim 19, further comprising:
the relay node receives a downlink terminal device message, wherein the downlink terminal device message is generated by the first core network device according to downlink data and a local context, the relay node finds the network selection device by performing downlink addressing according to terminal device identity information in the downlink terminal device message, wherein the local context comprises the terminal device identity information and a terminal device access identifier, and the downlink terminal device message comprises the downlink data, the terminal device identity information and the terminal device access identifier;
the relay node analyzes the downlink terminal equipment message, and finds out the corresponding terminal equipment according to the terminal equipment identity access identification in the downlink terminal equipment message;
and the relay node sends the downlink terminal equipment message to the corresponding terminal equipment.
23. An indirect communication method, the method comprising:
the method comprises the steps that network selection equipment receives a proxy terminal equipment message forwarded by a relay node through access network equipment, wherein the proxy terminal equipment message is constructed by the relay node according to the content of the terminal equipment message, the proxy terminal equipment message is used for initiating a message by the relay node in the identity of the terminal equipment, the content of the terminal equipment message is obtained by analyzing the terminal equipment message from the terminal equipment by the relay node, the terminal equipment message comprises terminal equipment identity information, and the proxy terminal equipment message comprises the terminal equipment identity information;
the network selection equipment determines a core network to which the terminal equipment belongs according to the terminal equipment identity information in the proxy terminal equipment message;
and the network selection equipment sends the proxy terminal equipment message to first core network equipment corresponding to a core network to which the terminal equipment belongs, and the corresponding first core network equipment carries out subsequent processing on the proxy terminal equipment message.
24. The method of claim 23, wherein the determining, by the network selection device, the core network to which the terminal device belongs according to the terminal device identity information in the proxy terminal device message comprises:
and the network selection equipment acquires the subscription information of the terminal equipment from a user database according to the terminal equipment identity information in the proxy terminal equipment message, and judges the core network to which the terminal equipment belongs according to the subscription information of the terminal equipment.
25. The method according to claim 23, wherein the network selection device sends the proxy terminal device message to a first core network device corresponding to a core network to which the terminal device belongs, and the subsequent processing of the proxy terminal device message by the corresponding first core network device includes:
if the network selection equipment is core network equipment corresponding to a core network to which the terminal equipment belongs, the network selection equipment performs subsequent processing on the proxy terminal equipment message, otherwise, the network selection equipment forwards the proxy terminal equipment message to first core network equipment corresponding to the core network to which the terminal equipment belongs, and the first core network equipment performs subsequent processing on the proxy terminal equipment message.
26. The method of claim 23, further comprising:
the network selection equipment receives downlink terminal equipment information, wherein the downlink terminal equipment information is generated by the first core network equipment according to downlink data and a local context, the local context comprises terminal equipment identity information and a terminal equipment access identifier, and the downlink terminal equipment information comprises the downlink data, the terminal equipment identity information and the terminal equipment access identifier;
the network selection equipment carries out downlink addressing according to the terminal equipment identity information in the downlink terminal equipment message to find a corresponding relay node;
the network selection equipment sends the downlink terminal equipment message to the corresponding relay node, the corresponding relay node analyzes the downlink terminal equipment message, the corresponding relay node finds the corresponding terminal equipment according to the terminal equipment access identification in the downlink terminal equipment message, and the corresponding relay node sends the downlink terminal equipment message to the corresponding terminal equipment.
27. An indirect communication method, the method comprising:
a first core network device receives a proxy terminal device message from a network selection device, wherein the first core network device is a core network device corresponding to a core network to which the terminal device belongs, the core network to which the terminal device belongs is determined by the network selection device according to terminal device identity information in the proxy terminal device message, the proxy terminal device message is constructed by a relay node according to content of the terminal device message, the proxy terminal device message is used for the relay node to initiate a message by using the identity of the terminal device, the content of the terminal device message is obtained by analyzing the terminal device message from the terminal device by the relay node, the terminal device message includes the terminal device identity information, the proxy terminal device message includes the terminal device identity information, and the proxy terminal device message is obtained by forwarding the relay node to the network selection device through an access network device The equipment is provided;
and the first core network equipment carries out subsequent processing on the terminal equipment message.
28. The method of claim 27, further comprising:
the first core network equipment analyzes the agent terminal equipment message to obtain access side information, and the access side information is carried in the agent terminal equipment message by the relay node;
the first core network device stores the access side information in a context for addressing the terminal device during downlink addressing, or stores the access side information in a node management module for managing the relay node and the position thereof by the node management module.
29. The method of claim 27, further comprising:
the first core network equipment analyzes the proxy terminal equipment message to obtain a terminal equipment access identifier, and the terminal equipment access identifier is carried in the proxy terminal equipment message by the relay node;
and the first core network equipment stores the terminal equipment access identification in a context for addressing the terminal equipment during downlink addressing.
30. The method of claim 27, further comprising:
the first core network equipment receives downlink data;
the first core network device generates a downlink terminal device message according to the downlink data and a local context, wherein the local context comprises terminal device identity information and a terminal device access identifier, and the downlink terminal device message comprises the downlink data, the terminal device identity information and the terminal device access identifier;
the first core network device sends the downlink terminal device message to the network selection device, the downlink terminal device message is used for the network selection device to perform downlink addressing according to the terminal device identity information in the downlink terminal device message to find a corresponding relay node, the downlink terminal device message is forwarded to the corresponding relay node, the corresponding relay node analyzes the downlink terminal device message, the corresponding relay node finds a corresponding terminal device according to a terminal device access identifier in the downlink terminal device message, and the corresponding relay node sends the downlink terminal device message to the corresponding terminal device.
31. A relay node, comprising:
a processor and a memory coupled to each other, the memory having computer program code stored therein;
the processor reads and executes computer program code stored in the memory to cause the relay node to perform the method of any of claims 1-5, 19, 22.
32. A network selection device, comprising:
a processor and a memory coupled to each other, the memory having computer program code stored therein;
the processor reads and executes the computer program code stored in the memory to cause the network selection device to perform the method of any of claims 6-13, 23-26.
33. A core network device, comprising:
a processor and a memory coupled to each other, the memory having computer program code stored therein;
the processor reads and executes the computer program code stored in the memory to cause the core network device to perform the method of any of claims 14-18, 27-30.
34. A communication system comprising a relay node according to claim 31, a network selection device according to claim 32 and a core network device according to claim 33.
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