CN111465000B - Call addressing method and device - Google Patents

Call addressing method and device Download PDF

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Publication number
CN111465000B
CN111465000B CN202010251514.XA CN202010251514A CN111465000B CN 111465000 B CN111465000 B CN 111465000B CN 202010251514 A CN202010251514 A CN 202010251514A CN 111465000 B CN111465000 B CN 111465000B
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address
block chain
temporary identity
module
operator
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CN111465000A (en
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田新雪
肖征荣
马书惠
贾佳
杨子文
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China United Network Communications Group Co Ltd
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China United Network Communications Group Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/35—Network arrangements, protocols or services for addressing or naming involving non-standard use of addresses for implementing network functionalities, e.g. coding subscription information within the address or functional addressing, i.e. assigning an address to a function
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/45—Network directories; Name-to-address mapping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/104—Peer-to-peer [P2P] networks
    • H04L67/1061—Peer-to-peer [P2P] networks using node-based peer discovery mechanisms
    • H04L67/1068—Discovery involving direct consultation or announcement among potential requesting and potential source peers
    • H04L67/107—Discovery involving direct consultation or announcement among potential requesting and potential source peers with limitation or expansion of the discovery scope
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)

Abstract

The invention discloses a call addressing method, which comprises the following steps: receiving a call request, if a called number carried in the call request is a non-standard number, broadcasting a first Internet Protocol (IP) address request message carrying the called number in a first block chain, wherein the called number is a temporary identity of a called terminal, receiving a first IP address response message broadcasted by a public node in a second block chain and the first block chain, wherein the second block chain is a block chain of a second operator network to which the called terminal belongs, and the second operator is different from an operator to which the equipment belongs, acquiring an IP address in the first IP address response message, and forwarding the call request according to the IP address. The call addressing method provided by the embodiment of the invention can provide addressable capability for the card-free UE when being called, and improves the communication convenience degree of the card-free UE.

Description

Call addressing method and device
Technical Field
The invention relates to the technical field of communication, in particular to a call addressing method and a call addressing device.
Background
In the prior art, a UE (User Equipment), such as a mobile terminal, normally accesses a 5G (fifth-generation) network depending on a SIM (Subscriber Identity Module), and once the UE accesses the 5G network, the UE has a formal network Identity, and has a complete call and addressing procedure for the UE using the SIM card in 5G session management. However, when the card-less UE accesses the 5G network in some way, the network identity of the card-less UE is user-defined, and generally only can actively initiate a call or access to the outside, but cannot be called or addressed. Therefore, the development of cardless UEs is greatly limited.
Disclosure of Invention
Therefore, the invention provides a call addressing method and a call addressing device, which aim to solve the problem that the UE without the card cannot be called and addressed because the network identity of the UE without the card is customized by a user in the prior art.
In order to achieve the above object, a first aspect of the present invention provides a call addressing method applied to a first session management function entity, SMF, the method including:
receiving a call request;
if the called number carried in the call request is a non-standard number, broadcasting a first Internet Protocol (IP) address request message carrying the called number in a first block chain, wherein the called number is a temporary identity of a called terminal;
receiving a second block chain and a first IP address response message broadcast by a public node in the first block chain, wherein the second block chain is a block chain of a second operator network to which the called terminal belongs, and the second operator is different from an operator to which the device belongs;
and acquiring the IP address in the first IP address response message, and forwarding the call request according to the IP address.
A second aspect of the present invention provides a call addressing method applied to a first temporary identity registration server, where the method includes:
receiving a first IP address request message broadcasted by a first session management function entity (SMF) and acquiring a temporary identity carried in the first IP address request message;
and if the corresponding IP address is not acquired locally according to the temporary identity, broadcasting a second IP address request message carrying the temporary identity in the first block chain.
Preferably, the first blockchain ledger book is queried locally according to the temporary identity to obtain an IP address corresponding to the temporary identity.
A third aspect of the present invention provides a call addressing method applied to a second temporary identity registration server, where the method includes:
receiving a third IP address request message broadcasted by a public node in the first block chain and the second block chain, and acquiring a temporary identity carried in the third IP address request message; the first block chain is a block chain of a first operator network to which a calling terminal belongs, the first operator is different from an operator to which the equipment belongs, and the calling terminal calls a called terminal in a second block chain;
inquiring a second block chain account book according to the temporary identity to obtain an IP address corresponding to the temporary identity;
and broadcasting a second IP address response message carrying the IP address in a second block chain.
Preferably, the method further comprises:
receiving a registration request message broadcast by a card-free terminal;
and if the temporary identity acquired from the registration request message is different from the existing temporary identity, broadcasting a registration success message carrying the temporary identity and the public key of the equipment in the second block chain.
Preferably, after the broadcasting of the registration success message carrying the temporary identity and the public key of the device in the second blockchain, the method further includes:
obtaining an IP address corresponding to the temporary identity from a second session management function entity (SMF);
and if the IP address acquired from the registration request message is consistent with the IP address acquired from the second SMF, establishing a corresponding relation between the temporary identity and the IP address and sending the corresponding relation to other temporary identity registration servers.
A fourth aspect of the present invention provides a call addressing method applied to a public node, the method including:
receiving a second Internet Protocol (IP) address response message broadcast by a second temporary identity registration server, wherein the second temporary identity registration server belongs to a second block chain;
acquiring the IP address in the second IP address response message;
and broadcasting a first IP address response message carrying the IP address in the first block chain.
Preferably, the method further comprises:
receiving a second IP address request message broadcast by a first temporary identity registration server, wherein the first temporary identity registration server belongs to a first block chain;
acquiring a temporary identity in the second IP address request message;
and broadcasting a third IP address request message carrying the temporary identity in a second block chain.
The fifth aspect of the present invention provides a session management functional entity, where the session management functional entity includes a receiving module, a determining module, a broadcasting module, and a processing module;
the receiving module is configured to receive a call request and a first IP address response message broadcast by a public node in a second blockchain and the first blockchain, where the second blockchain is a blockchain of a second operator network to which the called end belongs, and the second operator is different from an operator to which the device belongs;
the judging module is used for judging whether the called number carried in the calling request is a non-standard number or not;
the broadcast module is configured to broadcast a first internet protocol IP address request message carrying a called number in a first block chain if the called number carried in the call request is a non-standard number, where the called number is a temporary identity of a called end;
the processing module is used for acquiring the IP address in the first IP address response message and forwarding the call request according to the IP address.
A sixth aspect of the present invention provides a temporary identity registration server, which is characterized in that the temporary identity registration server includes a receiving module, an obtaining module, a determining module, and a broadcasting module;
the receiving module is used for receiving a first IP address request message broadcasted by a first session management function entity (SMF);
the obtaining module is used for obtaining the temporary identity carried in the first IP address request message;
the judging module is used for judging whether the corresponding IP address is locally obtained according to the temporary identity;
the broadcast module is used for broadcasting a second IP address request message carrying the temporary identity in the first block chain if the corresponding IP address is not locally acquired according to the temporary identity.
A seventh aspect of the present invention provides a temporary identity registration server, which is characterized in that the temporary identity registration server includes a receiving module, an obtaining module, an inquiring module, and a broadcasting module;
the receiving module is used for receiving a third IP address request message broadcasted by a public node in the first block chain and the second block chain;
the acquiring module is used for acquiring the temporary identity carried in the third IP address request message; the first block chain is a block chain of a first operator network to which a calling terminal belongs, the first operator is different from an operator to which the equipment belongs, and the calling terminal calls a called terminal in a second block chain;
the query module is used for querying a second block chain account book according to the temporary identity to obtain an IP address corresponding to the temporary identity;
the broadcast module is configured to broadcast a second IP address response message carrying the IP address in a second block chain.
An eighth aspect of the present invention provides a network node, where the network node includes a receiving module, an obtaining module, and a broadcasting module;
the receiving module is configured to receive a second internet protocol IP address response message broadcast by a second temporary identity registration server, where the second temporary identity registration server belongs to a second block chain;
the acquiring module is used for acquiring the IP address in the second IP address response message;
the broadcast module is configured to broadcast a first IP address response message carrying the IP address in a first block chain.
In the call addressing method provided in the embodiment of the present invention, an SMF-B receives a call request, if it is determined that a called number, i.e., a temporary identity, in the call request is a non-standard number, a first IP address request message carrying the called number is broadcasted in a blockchain B, a Server-B obtains the temporary identity therein after receiving the message, if an IP address is not locally obtained according to the temporary identity, a second IP address request message carrying the temporary identity is broadcasted in the blockchain B, a Server-a receiving node C obtains the temporary identity therein after receiving a third IP address request message broadcasted in the blockchain a and queries a blockchain a ledger according to the temporary identity to obtain an IP address, broadcasts a second IP address response message carrying the IP address in the blockchain a, a node D obtains the IP address therein after receiving the message and broadcasts a first IP address response message carrying the IP address in the blockchain B, after receiving the message, SMF-B acquires the IP address therein and forwards the call request according to the IP address. The call addressing method provided by the embodiment of the invention can provide the addressable capability of the card-free UE when being called under the condition that the identity of the card-free UE is self-defined, thereby improving the communication convenience degree of the card-free UE and promoting the development of the card-free UE.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a first flowchart illustrating a call addressing method according to an embodiment of the present invention;
fig. 2 is a second flowchart illustrating a call addressing method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an SMF in a first block chain according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a first temporary identity registration server according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a second temporary identity registration server according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a network node according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are given by way of illustration and explanation only, not limitation.
The fifth Generation Mobile communication technology (5th Generation Mobile networks, 5G) is The latest Generation cellular Mobile communication technology, namely 4G (The 4th Generation Mobile communication technology), The fourth Generation Mobile communication technology such as LTE-a (Long Term Evolution-Advanced, Long Term Evolution Advanced) and WiMax (World Interoperability for Microwave Access)), 3G (The third Generation Mobile communication technology such as UMTS (Universal Mobile Telecommunications System), LTE (Long Term Evolution), and 2G (selected Generation), The Second Generation Mobile communication technology such as GSM (Global for Mobile Communications), The Global System for Mobile Communications (GSM-extended). The performance goals of 5G are high data rates, reduced latency, energy savings, reduced cost, increased system capacity, and large-scale device connectivity. The first phase of the 5G specification in Release-15 was to accommodate early commercial deployments. The second phase of Release-16 will be completed in month 4 of 2020, and is submitted to the International Telecommunications Union (ITU) as a candidate for IMT-2020(5G) technology. The ITU IMT-2020 specification requires speeds up to 20Gbit/s, and can implement wide channel bandwidth and large capacity MIMO (multiple-in multiple-out).
In 2019, 10, 31 months, three operators publish 5G commercial packages, and formally bring on-line 5G commercial packages in 11, 1 days. 5G mobile networks like earlier 2G, 3G and 4G mobile networks, 5G networks are digital cellular networks in which the service area covered by a provider is divided into a number of small geographical areas known as cells. Analog signals representing sound and images are digitized in the handset, converted by an analog-to-digital converter and transmitted as a bit stream. All 5G wireless devices in a cell communicate by radio waves with local antenna arrays and low power autonomous transceivers (transmitters and receivers) in the cell. The transceiver allocates frequency channels from a common pool of frequencies that are reusable in geographically separated cells. The local antenna is connected to the telephone network and the internet through a high bandwidth fiber or wireless backhaul connection. As with existing handsets, when a user crosses from one cell to another, their mobile device will automatically "switch" to the antenna in the new cell.
The main advantage of 5G networks is that the data transmission rates are much higher than in previous cellular networks, up to 10Gbit/s, faster than current wired internet, 100 times faster than previous 4G LTE cellular networks. Another advantage is lower network delay (faster response time), below 1 ms, and 4G 30-70 ms. Due to faster data transmission, the 5G network will not only serve the handset, but will also become a general home and office network provider, competing with the cable network provider. Previous cellular networks provided low data rate internet access suitable for cell phones, but one cell phone tower could not economically provide sufficient bandwidth as a general internet provider for home computers.
In 5G, the services such as audio, video and images facing large-scale users are rapidly increased, and the explosive increase of network traffic can greatly influence the quality of service for users to access the Internet. How to effectively distribute large-flow service content and reduce the time delay of obtaining information by a user becomes a big problem for network operators and content providers. The problem cannot be solved by merely increasing the bandwidth, and is also influenced by factors such as route blocking and delay in transmission, processing capacity of a web server, and the like, and the problem is closely related to the distance between user servers.
Aiming at the problem that the cardless UE can not be called and addressed in the prior art, the embodiment of the invention provides a call addressing method, and a system applied by the method comprises the following steps: a first blockchain network of operator B (blockchain B) and a second blockchain network of operator a (blockchain a). The block chain B comprises a calling terminal UE-B, a first Session Management Function entity SMF-B (SMF), a first temporary identity registration Server Server-B, a node C and a node D. The block chain A comprises a called terminal UE-A, a second temporary identity registration Server Server-A, a node C and a node D. Wherein, the node C and the node D are common nodes in the blockchain a and the blockchain B.
As shown in fig. 1, the call addressing method provided in the embodiment of the present invention may include the following steps in the called stage of the cardless UE (i.e. UE-a):
step 1, SMF-B receives a call request.
In this step, when UE-B in block chain B calls UE-a in block chain a, the call request is first forwarded to SMF-B in block chain B.
And step 2, if the SMF-B judges that the called number carried in the call request is a non-standard number, broadcasting a first IP (Internet Protocol) address request message carrying the called number in the block chain B, wherein the called number is a temporary identity of the called terminal.
In this step, the called number is carried in the call request, and when the SMF-B recognizes that the called number is the temporary identity, which indicates that the called end is the card-less UE, the SMF-B initiates a request in the block chain B to request the IP address corresponding to the temporary identity. Specifically, the SMF-B signs a first IP address request message carrying the temporary identity of the UE-a using its own private key, and then broadcasts the first IP address request message in the blockchain B.
It should be noted that, after receiving the call request, the SMF-B may also synchronize the ledger of the blockchain a, and directly query the ledger of the blockchain a according to the temporary identity to obtain the IP address of the UE-a, but this implementation is not favorable to protecting the communication security of the blockchain a, and may also occupy the storage space of the SMF-B.
And 3, the Server-B receives the first IP address request message broadcasted by the SMF-B and acquires the temporary identity carried in the first IP address request message.
In this step, after receiving a first IP address request message broadcast by the SMF-B, the Server-B in the blockchain B first queries the account book of the blockchain B according to the blockchain identifier of the SMF-B to obtain the public key of the SMF-B, then verifies the private key signature of the first IP address request message using the public key of the SMF-B, and if the verification is passed, obtains the temporary identity of the UE-a carried in the first IP address request message.
The embodiment of the invention ensures the authenticity of the identity of each communication node and ensures the safety and reliability of communication by utilizing the traceable characteristic of the block chain account book and the safety mechanism of the identity verification of the public and private keys of the block chain.
And 4, if the Server-B does not obtain the corresponding IP address locally according to the temporary identity, broadcasting a second IP address request message carrying the temporary identity in the block chain B.
In some embodiments, the Server-B locally queries the first blockchain ledger according to the temporary identity to obtain the IP address corresponding to the temporary identity. Specifically, the Server-B may query the IP address of the UE-a in the book of the blockchain B according to the temporary identity of the UE-a, if the IP address corresponding to the temporary identity is not obtained through query, which indicates that the UE-a does not belong to the operator B to which the UE-B belongs, the Server-B signs a second IP address request message carrying the temporary identity of the UE-a using its own private key, and then broadcasts the second IP address request message in the blockchain B.
And step 5, the node C receives the second IP address request message broadcasted by the Server-B and acquires the temporary identity in the second IP address request message.
In this step, since node C is a common node of the blockchain a and the blockchain B, node C may receive the second IP address request message broadcast by the Server-B. After receiving the second IP address request message broadcast by the Server-B, the node C queries the account book of the block chain B according to the block chain identifier of the Server-B to obtain the public key of the Server-B, and verifies the private key signature of the second IP address request message by using the public key of the Server-B. And if the verification is passed, the node C acquires the temporary identity in the second IP address request message.
And 6, the node C broadcasts a third IP address request message carrying the temporary identity in the block chain A.
In step, since node C is a common node in both blockchain B and blockchain a, node C has a public-private key pair in blockchain B and blockchain a, respectively. And the node C signs a third IP address request message carrying the temporary identity of the UE-A by using a private key of the node C in the block chain A, and then broadcasts the third IP address request message in the block chain A.
And 7, the Server-A receives the third IP address request message broadcast by the node C and acquires the temporary identity carried in the third IP address request message.
In this step, after receiving the third IP address request message broadcast by the node C, the Server-a in the blockchain a queries the account book of the blockchain a according to the blockchain identifier of the node C to obtain the public key of the node C in the blockchain a, verifies the private key signature of the third IP address request message using the public key of the node C in the blockchain a, and if the verification passes, the Server-a obtains the temporary identity identifier in the third IP address request message.
And 8, the Server-A queries the account book of the block chain A according to the temporary identity to obtain the IP address corresponding to the temporary identity.
In this step, if the UE-a successfully registers the temporary identity at the Server-a, the account book of the local blockchain a of the Server-a records the corresponding relationship between the temporary identity of the UE-a and the IP address. The Server-A can inquire the account book of the block chain A according to the temporary identity of the UE-A to obtain the IP address of the UE-A.
And 9, the Server-A broadcasts a second IP address response message carrying the IP address in the block chain A.
In this step, after the Server-a queries and obtains the IP address of the UE-a, it uses its own private key to sign the second IP address response message carrying the IP address of the UE-a, and then broadcasts the second IP address response message in the block chain a.
And step 10, the node D receives the second IP address response message broadcasted by the Server-A and acquires the IP address therein.
In this step, since node D is a common node in both the blockchain a and the blockchain B, node D can receive the second IP address response message broadcast by Server-a. After receiving the second IP address response message broadcast by the Server-A, the node D queries the account book of the block chain A according to the block chain identifier of the Server-A, obtains a public key of the Server-A to verify the private key signature of the second IP address response message, and if the verification is passed, the node D obtains the IP address in the second IP address response message.
Step 11, the node D broadcasts a first IP address response message carrying the IP address in the block chain B.
In this step, node D has its own public-private key pair in blockchain a and blockchain B, respectively, since node D is a common node in blockchain a and blockchain B. The node D signs the first IP address response message carrying the IP address of the UE-A by using the private key of the node D in the block chain B, and then broadcasts the first IP address response message in the block chain B.
And step 12, the SMF-B receives the first IP address response message broadcasted by the node D, acquires the IP address in the first IP address response message, and forwards the call request according to the IP address.
In this step, after receiving the first IP address response message broadcast by the node D, the SMF-B in the blockchain B queries the account book of the blockchain B according to the blockchain identifier of the node D to obtain the public key of the node D in the blockchain B, verifies the private key signature of the first IP address response message by using the public key of the node D in the blockchain B, and if the public key passes the verification, acquires the IP address in the first IP address response message and initiates a call to the IP address, thereby completing the addressing call process for the UE-a.
As can be seen from steps 1-12, in the call addressing method provided in the embodiment of the present invention, SMF-B receives a call request, if it is determined that a called number, i.e. a temporary identity, in the call request is a non-standard number, then a first IP address request message carrying the called number is broadcast in a blockchain B, Server-B obtains a temporary identity therein after receiving the message, if an IP address is not locally obtained according to the temporary identity, then a second IP address request message carrying the temporary identity is broadcast in the blockchain B, Server-a receives a third IP address request message broadcast in the blockchain a, then obtains the temporary identity therein and queries a block chain a book according to the temporary identity to obtain the IP address, then broadcasts a second IP address response message carrying the IP address in the blockchain a, and the node D acquires the IP address after receiving the message and broadcasts a first IP address response message carrying the IP address in the block chain B, and the SMF-B acquires the IP address after receiving the message and forwards the call request according to the IP address. The call addressing method provided by the embodiment of the invention can provide the addressability when the identity of the card-free UE is self-defined, so that the communication convenience degree of the card-free UE is improved, and the development of the card-free UE is promoted.
As shown in fig. 2, the call addressing method provided in the embodiment of the present invention may further include the following steps in the stage of registering the temporary identity for the card-less UE (i.e. UE-a):
step 21, Server-A receives the registration request message broadcast by UE-A.
In this step, when UE-a registers the temporary identity at the temporary identity registration server, UE-a signs the registration request message with its own private key, and then broadcasts the registration request message in blockchain a. The registration request message carries a user-defined temporary identity of the UE-A, and the temporary identity comprises a terminal identity and an IP address of the UE-A. The Server-a in block chain a may receive the registration request message broadcast by UE-a.
And step 22, if the temporary identity acquired by the Server-A from the registration request message is different from the existing temporary identity, broadcasting a registration success message carrying the temporary identity and the public key of the device in the block chain A.
In this step, after receiving the registration request message broadcast by the UE-a, the Server-a queries the account book of the blockchain a according to the blockchain identifier of the UE-a to obtain the public key of the UE-a, verifies the private key signature of the registration request message by using the public key of the UE-a, and if the verification is passed, obtains the temporary identity in the registration request message, and further obtains the IP address according to the temporary identity. The Server-A can inquire the account book of the block chain A, judge whether the temporary identity in the registration request message is the same as the existing temporary identity, if not, use the private key of the Server-A to sign the successful registration message carrying the temporary identity and the public key of the device, and then broadcast the successful registration message in the block chain A.
It should be noted that, after receiving the registration success message broadcast by the Server-a, the accounting node in the blockchain a may query the account book of the blockchain a according to the blockchain identifier of the Server-a to obtain the public key of the Server-a, verify the private key signature of the registration success message, and if the verification is passed, may obtain the temporary identity identifier and the Server-a public key in the registration success message. The accounting node can also record the sign of successful registration, the corresponding relation between the temporary identity and the IP address and the Server-A public key into a new block, and further record the sign of successful registration, the corresponding relation between the temporary identity and the IP address and the Server-A public key into an account book of the block chain A. The accounting node may sign the ledger of the blockchain a using its own private key, and then broadcast the blockchain a ledger in the blockchain a. The Server-A inquires the account book of the local block chain A according to the block chain identification of the accounting node to obtain the public key of the accounting node, verifies the account book of the block chain A broadcast by the accounting node by using the public key of the accounting node, and updates the account book of the local block chain A into a new account book of the block chain A broadcast by the accounting node after the verification is passed.
And step 23, the Server-A acquires the IP address corresponding to the temporary identity from the SMF-A.
In this step, the Server-a may determine a SUbscription hidden Identifier (SUCI) or a Globally Unique Temporary user equipment Identifier (GUTI) of the UE-a according to the Temporary Identity of the UE-a, and further send a request to the SMF-a according to the SUCI or GUTI of the UE-a, thereby obtaining an IP address allocated by the SMF-a to the UE-a according to the Temporary Identity.
And step 24, if the Server-A judges that the IP address obtained from the registration request message is consistent with the IP address obtained from the SMF-A, establishing a corresponding relation between the temporary identity and the IP address and sending the corresponding relation to other temporary identity registration servers.
In this step, if the IP address allocated by the SMF-a for the UE-a is consistent with the IP address in the registration request message, the Server-a may establish a correspondence between the temporary identity of the UE-a and the IP address, and synchronize the correspondence to other temporary identity registration servers in the block chain a in a broadcast message manner using a private key signature.
It should be noted that the whole 5G network may have a blockchain network of multiple operators, and each blockchain network may have one or more temporary identity registration servers, that is, the whole 5G network may have multiple servers, and each Server may present a star topology network connection, and may synchronize, in real time, a correspondence between a temporary identity and an IP address of a 5G cardless terminal between the servers.
It can be seen from the foregoing steps 21-24 that the Server-a receives the registration request message broadcast by the UE-a, if the temporary identity obtained from the registration request message is different from the existing temporary identity, then a registration success message carrying the temporary identity and the public key of the device is broadcast in the blockchain a, the Server-a obtains the IP address corresponding to the temporary identity from the SMF-a, and if the IP address obtained from the registration request message is consistent with the IP address obtained from the SMF-a, then establishes a correspondence between the temporary identity and the IP address and sends the correspondence to another temporary identity registration Server. The embodiment of the invention can determine whether to issue the registration success message and whether to establish the corresponding relation between the temporary identity and the IP address according to the temporary identity and the IP address in the registration request message sent by the cardless terminal, thereby providing convenience for the subsequent implementation of the called addressing of the cardless UE. The identity of the temporary identity registration server can be verified in a private key signature verification mode, the registration process can be recorded and traceable in a block chain account book recording mode, and communication of a false temporary identity registration server is avoided.
Based on the same inventive concept, an embodiment of the present invention further provides a session management function entity (SMF-B), which may include a receiving module 101, a determining module 102, a broadcasting module 103, and a processing module 104, as shown in fig. 3.
The receiving module 101 is configured to receive a call request and a first IP address response message broadcast by a common node in a first block chain and a second block chain, where the second block chain is a block chain of a second operator network to which a called end belongs, and the second operator is different from an operator to which the device belongs.
The determining module 102 is configured to determine whether the called number carried in the call request is a non-standard number.
The broadcasting module 103 is configured to broadcast a first IP address request message carrying the called number in the first block chain if the called number carried in the call request is a non-standard number, where the called number is a temporary identity of the called end.
The processing module 104 is configured to obtain an IP address in the first IP address response message, and forward the call request according to the IP address.
The embodiment of the present invention further provides a temporary identity registration Server (Server-B), as shown in fig. 4, the temporary identity registration Server may include a receiving module 201, an obtaining module 202, a determining module 203, and a broadcasting module 204.
The receiving module 201 is configured to receive a first IP address request message broadcasted by a first SMF.
The obtaining module 202 is configured to obtain the temporary identity carried in the first IP address request message.
The judging module 203 is configured to judge whether the corresponding IP address is obtained locally according to the temporary identity.
The broadcasting module 204 is configured to, if the corresponding IP address is not locally obtained according to the temporary identity, broadcast a second IP address request message carrying the temporary identity in the first block chain.
In some embodiments, the obtaining module 202 is configured to locally query the first blockchain ledger according to the temporary identity to obtain an IP address corresponding to the temporary identity.
An embodiment of the present invention further provides a temporary identity registration Server (Server-a), as shown in fig. 5, the temporary identity registration Server may include a receiving module 301, an obtaining module 302, an inquiring module 303, and a broadcasting module 304.
The receiving module 301 is configured to receive a third IP address request message broadcast by a common node in the first blockchain and the second blockchain.
The obtaining module 302 is configured to obtain a temporary identity carried in the third IP address request message; the first block chain is a block chain of a first operator network to which the calling terminal belongs, the first operator is different from an operator to which the device belongs, and the calling terminal calls a called terminal in the second block chain.
The query module 303 is configured to query the second block chain ledger according to the temporary identity to obtain an IP address corresponding to the temporary identity.
The broadcasting module 304 is configured to broadcast a second IP address response message carrying an IP address in a second block chain
In some embodiments, the receiving module 301 is further configured to receive a registration request message broadcast by the cardless terminal. The Server-a may further include a determining module, configured to determine whether the temporary identity obtained from the registration request message is the same as an existing temporary identity. The broadcasting module 304 is further configured to broadcast a registration success message carrying the temporary identity and the public key of the device in the second block chain if the temporary identity obtained from the registration request message is different from the existing temporary identity.
In some embodiments, the obtaining module 302 is further configured to obtain, from the second session management function entity SMF, an IP address corresponding to the temporary identity. The judging module is further configured to judge whether the IP address obtained from the registration request message is consistent with the IP address obtained from the second SMF. The broadcast module 304 is further configured to, if the IP address obtained from the registration request message is consistent with the IP address obtained from the second SMF, establish a corresponding relationship between the temporary identity and the IP address, and send the corresponding relationship to another temporary identity registration server.
An embodiment of the present invention further provides a network node (a common node C, D of a blockchain a and a blockchain B), as shown in fig. 6, where the network node includes a receiving module 401, an obtaining module 402, and a broadcasting module 403.
The receiving module 401 is configured to receive a second IP address response message broadcast by a second temporary identity registration server, where the second temporary identity registration server belongs to a second block chain.
The obtaining module 402 is configured to obtain an IP address in the second IP address response message.
The broadcasting module 403 is configured to broadcast a first IP address response message carrying an IP address in the first block chain.
In some embodiments, the receiving module 401 is further configured to receive a second IP address request message broadcasted by a first temporary identity registration server, where the first temporary identity registration server belongs to the first blockchain.
The obtaining module 402 is further configured to obtain the temporary identity in the second IP address request message.
The broadcasting module 403 is further configured to broadcast a third IP address request message carrying the temporary identity in the second block chain.
It will be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principles of the present invention, and the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.

Claims (6)

1. A call addressing method applied to a first Session Management Function (SMF), the method comprising:
receiving a call request;
if the called number carried in the call request is a non-standard number, broadcasting a first Internet Protocol (IP) address request message carrying the called number in a first block chain, wherein the called number is a temporary identity of a called terminal;
receiving a second block chain and a first IP address response message broadcast by a public node in the first block chain, wherein the second block chain is a block chain of a second operator network to which the called terminal belongs, and the second operator is different from an operator to which the device belongs;
and acquiring the IP address in the first IP address response message, and forwarding the call request according to the IP address.
2. A call addressing method applied to a second temporary identity registration server, the method comprising:
receiving third IP address request messages broadcast by public nodes in the first block chain and the second block chain, and acquiring temporary identity marks carried in the third IP address request messages; the first block chain is a block chain of a first operator network to which a calling terminal belongs, the first operator is different from an operator to which the equipment belongs, and the calling terminal calls a called terminal in a second block chain;
inquiring a second block chain account book according to the temporary identity to obtain an IP address corresponding to the temporary identity;
and broadcasting a second IP address response message carrying the IP address in a second block chain.
3. The method of claim 2, further comprising:
receiving a registration request message broadcast by a card-free terminal;
and if the temporary identity acquired from the registration request message is different from the existing temporary identity, broadcasting a registration success message carrying the temporary identity and the public key of the equipment in the second block chain.
4. The method according to claim 3, wherein after broadcasting the registration success message carrying the temporary identity and the device public key in the second blockchain, the method further comprises:
obtaining an IP address corresponding to the temporary identity from a second session management function entity (SMF);
and if the IP address acquired from the registration request message is consistent with the IP address acquired from the second SMF, establishing a corresponding relation between the temporary identity and the IP address and sending the corresponding relation to other temporary identity registration servers.
5. The session management functional entity is characterized by comprising a receiving module, a judging module, a broadcasting module and a processing module;
the receiving module is configured to receive a call request and a first IP address response message broadcast by a public node in a first block chain and a second block chain, where the second block chain is a block chain of a second operator network to which a called end belongs, and the second operator is different from an operator to which the device belongs;
the judging module is used for judging whether the called number carried in the calling request is a nonstandard number or not;
the broadcast module is configured to broadcast a first internet protocol IP address request message carrying a called number in a first block chain if the called number carried in the call request is a non-standard number, where the called number is a temporary identity of a called terminal;
the processing module is used for acquiring the IP address in the first IP address response message and forwarding the call request according to the IP address.
6. The temporary identity registration server is characterized by comprising a receiving module, an obtaining module, an inquiring module and a broadcasting module;
the receiving module is used for receiving a third IP address request message broadcasted by a public node in the first block chain and the second block chain;
the acquiring module is used for acquiring the temporary identity carried in the third IP address request message; the first block chain is a block chain of a first operator network to which a calling terminal belongs, the first operator is different from an operator to which the equipment belongs, and the calling terminal calls a called terminal in a second block chain;
the query module is used for querying a second block chain account book according to the temporary identity to obtain an IP address corresponding to the temporary identity;
the broadcast module is configured to broadcast a second IP address response message carrying the IP address in a second block chain.
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