CN114745814A - Data communication method of small base station and data communication system of small base station - Google Patents

Data communication method of small base station and data communication system of small base station Download PDF

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Publication number
CN114745814A
CN114745814A CN202210471273.9A CN202210471273A CN114745814A CN 114745814 A CN114745814 A CN 114745814A CN 202210471273 A CN202210471273 A CN 202210471273A CN 114745814 A CN114745814 A CN 114745814A
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data
user terminal
core network
lightweight core
protocol stack
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钟海辉
孙令熹
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Super Communications Co ltd
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Super Communications Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/08—Protocols for interworking; Protocol conversion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/60—Context-dependent security
    • H04W12/69—Identity-dependent
    • H04W12/72—Subscriber identity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • 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)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application provides a data communication method of a small base station and a data communication system of the small base station. The data communication method of the small base station comprises the following steps: a radio frequency unit receives first data sent by a user terminal; the radio frequency unit sends the first data to a protocol stack processing unit; the protocol stack processing unit sends the first data to a lightweight core network deployed in a small base station; the lightweight core network sends the first data to network equipment for interaction and receives second data aiming at the first data; the lightweight core network sends the second data to a protocol stack processing unit; the protocol stack processing unit sends the second data to the radio frequency unit; and the radio frequency unit returns the second data to the user terminal. According to the method and the device, the small base station and the lightweight core network are fused together, so that the cost of the component network is reduced, and the convenience of later-stage operation and maintenance of the network is improved.

Description

Data communication method of small base station and data communication system of small base station
Technical Field
The present application relates to the technical field of 5G communication, and in particular, to a data communication method and a data communication system for a small cell.
Background
The 5G small base station is a small-sized base station which can be installed indoors and is flexibly configured; the fixed broadband network is used as a return stroke to access an operator core network; the problem of weak indoor coverage of 5G network signals can be well solved, and high-quality signal coverage in a small range is provided. The method is mainly used for solving the problems of network capacity and 5G signal coverage in a small range, such as factories, mines, hot spots and important places.
In the process of building and using small base stations, it is found that: the existing 5G small base station is difficult to network; one way is to access to the operator core network through a public network Internet network, and a security gateway and an access gateway need to be redeployed; this approach requires operator involvement and access permission to provide normal service; in another mode, a large factory and a large mine purchase core network equipment by themselves to build a 5G private network by themselves, but the mode is often high in cost and complex in subsequent operation and maintenance.
Therefore, the data communication method and the data communication system of the small cell base station are low in construction cost and convenient to operate and maintain. By fusing the 5G small base station and the lightweight 5G core network together, 5G signal coverage and 5G-based data transmission services can be provided by starting the 5G small base station equipment, so that the problem of difficulty in networking of the existing 5G small base station is solved.
Disclosure of Invention
The embodiment of the application provides a data communication method of a small cell and a technical scheme of a data communication system of the small cell, wherein the data communication method is low in construction cost and convenient to operate and maintain.
Specifically, a data communication method of a small cell includes:
a radio frequency unit receives first data sent by a user terminal;
the radio frequency unit sends the first data to a protocol stack processing unit;
the protocol stack processing unit sends the first data to a lightweight core network deployed in a small base station;
the lightweight core network sends the first data to network equipment for interaction, and receives second data aiming at the first data;
the lightweight core network sends the second data to a protocol stack processing unit;
the protocol stack processing unit sends the second data to the radio frequency unit;
and the radio frequency unit returns the second data to the user terminal.
Further, the lightweight core network deployed in the small cell is provided with an NGAP signaling interface for implementing a basic access signaling of the user terminal.
Further, the lightweight core network deployed in the small cell is deployed with an authentication function for implementing IMSI authentication of the user terminal.
Furthermore, the lightweight core network deployed in the small cell is deployed with a user plane function for implementing data routing and forwarding of the user terminal.
Further, the user plane function deployed by the lightweight core network has an IP address pool;
and the user plane function is to allocate a fixed IP address to the user terminal according to the IMSI of the user terminal.
Further, the user plane function deployed by the lightweight core network performs data forwarding in a tunnel interface mode.
Further, a small cell data communication system includes:
the radio frequency unit is used for receiving first data sent by a user terminal;
the protocol stack processing unit is used for receiving the first data sent by the radio frequency unit;
the lightweight core network is used for receiving the first data sent by the protocol stack processing unit;
the lightweight core network sends first data to network equipment and carries out interaction so as to receive second data aiming at the first data;
and the second data is sent to the protocol stack processing unit through the lightweight core network, then sent to the radio frequency unit by the protocol stack processing unit, and finally returned to the user terminal by the radio frequency unit.
Further, the lightweight core network includes:
the NGAP signaling interface is used for realizing the basic access signaling of the user terminal;
the authentication module is used for realizing the IMSI authentication of the user terminal;
and the user plane module is used for realizing data routing and forwarding of the user terminal.
Further, the user plane module is provided with an IP address pool;
and the user plane module allocates a fixed IP address to the user terminal according to the IMSI of the user terminal.
Further, the user plane module performs data forwarding through a tunnel interface mode.
The technical scheme provided by the embodiment of the application has at least the following beneficial effects:
the application provides a data communication system with low construction cost and convenient operation and maintenance and a data communication method of a small cell. By fusing the 5G small base station and the lightweight 5G core network, 5G signal coverage and 5G-based data transmission services can be provided by starting the 5G small base station equipment, so that the problem that the existing 5G small base station is difficult to network is solved, the networking cost is reduced, and the convenience in later-stage operation and maintenance is improved.
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The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a data communication method of a small cell provided in an embodiment of the present application.
Fig. 2 is a schematic diagram of a small cell data communication system according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all 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 application.
Referring to fig. 1, an embodiment of a data communication method of a small cell base station according to the present disclosure includes:
s100: a radio frequency unit receives first data sent by a user terminal;
s200: the radio frequency unit sends the first data to a protocol stack processing unit;
s300: the protocol stack processing unit sends the first data to a lightweight core network deployed in a small base station;
s400: the lightweight core network sends the first data to network equipment for interaction, and receives second data aiming at the first data;
s500: the lightweight core network sends the second data to a protocol stack processing unit;
s600: the protocol stack processing unit sends the second data to the radio frequency unit;
s700: and the radio frequency unit returns the second data to the user terminal.
It can be understood that the Small Cell (Small Cell) adopts a low-power wireless access node, is a new network architecture, operates in an authorized and unauthorized frequency spectrum, and can cover a range of 10 meters to 200 meters. The Small Cell integrates a femtocell (femtocell), a picocell (picocell), a microcell (microcell), and a distributed wireless technology, such as a Remote Radio Head (RRH). The Small Cell is a Small, indoor-mounted and flexibly-configured base station; accessing a fixed broadband network into an operator core network as a backhaul; the problem of weak indoor coverage of 5G network signals can be well solved, and high-quality signal coverage in a small range is provided. The method is mainly used for solving the problems of network capacity and 5G signal coverage in a small range.
Further, in the method embodiment provided by the present application, a radio frequency unit, a protocol stack processing unit, and a lightweight core network unit are integrated on a Small Cell of a 5G Small Cell.
It can be understood that the Radio frequency Unit (Remote Radio Unit, RRU) described in the method embodiment of the present application is divided into two parts, namely, a near-end Unit, that is, a Radio base band controller (Radio Server, RS), and a Remote Unit, that is, a Radio Remote Unit, RRU, which are connected to each other through an optical fiber, and an interface of the Remote Unit is based on an open CPRI or IR interface, and can be stably connected to a device of a main manufacturer. The near-end unit RS can be installed in a proper machine room position, and the far-end unit RRU is installed at an antenna end. Thus, by separating a portion of the previous base station module and separating the near-end unit from the far-end unit, cumbersome maintenance work can be simplified to the near-end unit. One near-end machine can be connected with a plurality of far-end machines, so that space is saved, setting cost is reduced, and networking efficiency is improved.
The Protocol Stack (also called Protocol Stack) in the embodiment of the method is a specific software implementation of a computer network Protocol suite. One protocol in a suite of protocols is typically designed for only one purpose, which may make the design easier. Since each protocol module usually has to communicate with two other protocol modules above and below, they can usually be imagined as layers in a protocol stack. The lowest level of protocols always describes physical interactions with the hardware. Each advanced level adds more features. The user application is only handling the top-most protocol.
The lightweight Core Network described in the embodiment of the method integrally covers two series, namely, an Evolved Packet Core (EPC) and a 5G Core Network (5G Core Network, 5GC), which are respectively used for forming an end-to-end networking capability together with a 4G Radio Access Network (RAN) and a 5G NR (New Radio), completing independent networking of the 4G Radio Access Network RAN, independent networking SA or non-independent networking NSA networking of the 5GNR, and the like, and the product supports all standard interfaces and functions defined by a third cooperation partner plan (3rd Generation Partnership Project, 3GPP), completes User Experience (User Experience, UE) Access, authentication, registration, connection, mobility management, data storage management, mobility management, and the like together with the Radio Access Network or the NR Network, and also supports end-to-end Network construction of a private Network.
Compared with the lightweight Core Network of the embodiment, the Core Network (Core Network) can divide the mobile Network into three parts, a base station subsystem, a Network subsystem and a system support part. The core network part is located in the network subsystem, and the core network mainly functions to connect the call request or the data request to different networks. The core network functions to provide user connectivity, management of users, and bearer completion for services, and serves as a bearer network to provide an interface to external networks.
Specifically, the method embodiment provided by the application realizes that 5G small base station equipment can provide 5G signal coverage and 5G-based data transmission services by fusing the 5G small base station and the lightweight 5G core network together, and solves the problem of difficulty in networking of the existing 5G small base station.
It should be noted that, the embodiment provided by the present application can only provide data services based on 5G signals at present, and certainly, a part of the 5gc core can be reconfigured as needed to achieve the function of supporting voice calls.
Specifically, the method for implementing data communication in the embodiment of the method provided by the present application is as follows: when a user has a requirement for using a network, a signal, i.e., the first data, is sent by a user terminal such as a mobile phone or a computer. The radio frequency unit RRU receives first data sent by a user terminal and forwards the first data to the protocol stack processing unit. And after receiving the first data, the protocol stack processing unit processes the first data through a protocol stack protocol and then sends the first data to a lightweight core network deployed in the small base station. And the lightweight core network sends the first data to the network equipment for interaction to obtain second data aiming at the first data. And the second data obtained by the interaction between the lightweight core network and the network equipment is received by the lightweight core network and is sent back to the protocol stack processing unit. And the protocol stack processing unit forwards the second data to the radio frequency unit RRU. And finally, the radio frequency unit RRU feeds the second data back to the user terminal sending the first data. The data communication of the 5G small base station can be realized through the modes of forwarding, interaction and feedback.
Further, the lightweight core network deployed in the small cell is provided with an NGAP signaling interface for implementing a basic access signaling of the user terminal.
It will be appreciated that NGAP is used to provide signalling services between a 5G radio access network (NG RAN) and an AMF network protocol (Action Message Format). The NGAP signaling services are mainly divided into two categories: user terminal related services and non-user terminal related services. The embodiment of the method provided by the application adopts the user terminal related service of the NGAP signaling service. The user terminal related services of the NGAP signaling service specifically include: providing signaling and connection for the user terminal; managing a Protocol Data Unit (PDU) session management process and a PDU session related resource management; a user terminal context management process, which specifically comprises the steps of establishing, modifying and releasing a user terminal context; a mobile management flow, switching and path change request is sent to the user terminal; paging process, paging user terminal; and transmitting the NAS message of the uplink and downlink 5G Network Attached Storage (NAS) for a message transmission flow of the NAS. In the embodiment provided by the present application, the NGAP signaling service is used to provide signaling and connection for the user terminal, so as to implement basic access signaling of the user terminal.
Further, the lightweight core network deployed in the small cell is deployed with an authentication function for implementing IMSI authentication of the user terminal.
As can be appreciated, IMSI authentication is collectively referred to as International Mobile Subscriber Identity (IMSI) authentication. Is an identification code that is not repeated in all cellular networks for distinguishing different users in the cellular networks. The handset sends the international mobile subscriber identity IMSI to the network in a 64-bit field. The international mobile subscriber identity IMSI may be used to query a Home Location Register (HLR) or a Visitor Location Register (VLR) for subscriber information. Whenever a user of one mobile network needs to interwork with other mobile networks, the international mobile subscriber identity IMSI must be used.
Specifically, the IMSI is composed of a string of decimal digits, and has a maximum length of 15 digits. The Mobile communication system is formed by sequentially connecting a Mobile Country Code (MCC), a Mobile Network Code (MNC), and a Mobile Subscriber Identification Number (MSIN). The mobile country code MCC is 3 digits long, the mobile network code MNC length is determined by the value of the mobile country code MCC, and the value of the mobile subscriber identification code MSIN is self-assigned by the operator. In the embodiment, the authentication technology is deployed in a lightweight core network of a small cell to implement international mobile subscriber identity IMSI authentication of a user terminal.
Furthermore, the lightweight core network deployed in the small cell is deployed with a user plane function for implementing data routing and forwarding of the user terminal.
Further, the user plane function deployed by the lightweight core network has an IP address pool;
the user plane function is to allocate a fixed IP address to the user terminal according to the IMSI of the user terminal.
Specifically, in this embodiment, in order to implement data routing and forwarding of the user terminal, the lightweight core network of the small base station provided in this embodiment further has a user plane function. When the user terminal sends the first data, the radio frequency unit RRU receives the first data and sends the first data to the protocol stack processing unit, and then the protocol stack processing unit sends the first data to the lightweight core network, and the lightweight core network routes and forwards the first data through the user plane function. Similarly, when the lightweight core network sends the first data to the network device for interaction and receives the second data aiming at the first data, the second data is also routed and forwarded through the user plane function.
Further, in order to facilitate the use of the user plane function of the lightweight core network, the user plane function of this embodiment has an IP address pool. It can be understood that, after a user starts a Dynamic Host Configuration Protocol (DHCP), a starting IP address and an ending IP address may be set, thereby forming an address pool, and addresses in the address pool may be dynamically allocated to clients in the network for use. The IP address pool is a segment, or range, of IP that is primarily intended for a particular IP segment.
It should be noted that the dynamic host configuration protocol DHCP is a network protocol for a lan. The method is characterized in that a server controls a range of IP addresses, and a client can automatically obtain the IP address and the subnet mask allocated by the server when logging in the server.
Specifically, in the embodiment provided by the present application, the user plane function of the lightweight core network allocates a fixed IP address to the user terminal according to the international mobile subscriber identity IMSI of the user terminal authenticated by the authentication function deployed in the lightweight core network. That is, the international mobile subscriber identity IMSI in the small base station is bound with the IP address pool of the user plane, so as to implement the allocation of the fixed IP of the user terminal.
Further, the user plane function deployed by the lightweight core network performs data forwarding in a tunnel interface mode.
Specifically, in order to implement high-speed forwarding of data, the embodiment adopts a tunnel interface in an internet protocol.
It will be appreciated that the essence of tunneling is to transport one network layer protocol over another, with the basic functions of encapsulation and encryption being implemented primarily using network tunneling. Tunneling is a key technology for constructing VPNs. The method is used for simulating a point-to-point path in an IP public network China, and realizes the following two nodes: secure communication between VPN gateways, or between a VPN gateway and a VPN remote gateway, enables data packets to be transmitted out of a private tunnel over a public network. The basic composition of the tunnel includes: a tunnel start node; a tunnel termination node; IP networks, etc. The embodiment of the application realizes high-speed forwarding of data sent by the user terminal by adopting the tunnel interface technology.
Referring to fig. 2, further, the present application provides a small cell data communication system, including:
the radio frequency unit is used for receiving first data sent by a user terminal;
the protocol stack processing unit is used for receiving the first data sent by the radio frequency unit;
the lightweight core network is used for receiving the first data sent by the protocol stack processing unit;
the lightweight core network sends first data to network equipment and carries out interaction so as to receive second data aiming at the first data;
and the second data is sent to the protocol stack processing unit through the lightweight core network, then sent to the radio frequency unit by the protocol stack processing unit, and finally returned to the user terminal by the radio frequency unit.
Specifically, in the embodiment provided by the present application, a radio frequency unit, a protocol stack processing unit, and a lightweight core network unit are integrated on a Small Cell of a 5G Small Cell. The 5G small base station is fused with the lightweight 5G core network, so that 5G signal coverage and 5G-based data transmission services can be provided when 5G small base station equipment is started, and the problem of difficulty in networking of the existing 5G small base station is solved.
It can be understood that, the Radio frequency Unit (RRU) described in the embodiments of the present application is divided into two parts, namely, a near-end Unit, that is, a Radio baseband controller (RS), and a Remote Unit, that is, a Radio Remote Unit (RRU), which are connected to each other through an optical fiber, and an interface of the Radio frequency Unit is based on an open CPRI or IR interface, and can be stably connected to a device of a main flow manufacturer. The near-end unit RS can be installed in a proper machine room position, and the far-end unit RRU is installed at an antenna end. Thus, by separating a portion of the previous base station module and separating the near-end unit from the far-end unit, cumbersome maintenance work can be simplified to the near-end unit. One near-end machine can be connected with a plurality of far-end machines, so that space is saved, setting cost is reduced, and networking efficiency is improved.
The Protocol Stack (also called Protocol Stack) described in this embodiment is a specific software implementation of a computer network Protocol suite. One protocol in a suite of protocols is typically designed for only one purpose, which may make the design easier. Since each protocol module usually has to communicate with two other protocol modules above and below, they can usually be imagined as layers in a protocol stack. The lowest level of protocols always describes physical interactions with the hardware. Each advanced level adds more features. The user application is only handling the top-most protocol.
The lightweight Core Network described in this embodiment entirely covers two series, i.e., an Evolved Packet Core (EPC) and a 5G Core Network (5G Core Network, 5GC), of a 4G Radio Access Network (RAN) and a 5G Radio Network (NR) to form an end-to-end networking capability, and to complete independent networking of the 4G Radio Access Network RAN and independent networking SA or non-independent networking NSA of the 5GNR, and the product supports all standard interfaces and functions defined by a third cooperation partner plan (3rd Generation Partnership Project, 3GPP), and completes User Experience (UE) Access, authentication, registration, connection, mobility management, data storage management, mobility management, and the like with the Radio Access Network or the NR Network, and also supports end-to-end Network construction of a private Network.
It should be noted that, the embodiment provided by the present application can only provide data services based on 5G signals at present, and certainly, a part of the 5gc core can be reconfigured as needed to achieve the function of supporting voice calls.
Specifically, the present application provides an embodiment of such a data communication system, and the data communication between the user equipment and the small cell is implemented by the data communication method embodiment of the small cell provided by the present application. When a user has a requirement for using a network, a signal, i.e., the first data, is sent by a user terminal such as a mobile phone or a computer. The radio frequency unit RRU receives first data sent by a user terminal and forwards the first data to the protocol stack processing unit. And after receiving the first data, the protocol stack processing unit processes the first data through a protocol stack protocol and then sends the first data to a lightweight core network deployed in the small base station. And the lightweight core network sends the first data to the network equipment for interaction to obtain second data aiming at the first data. And the second data obtained by the interaction between the lightweight core network and the network equipment is received by the lightweight core network and is sent back to the protocol stack processing unit. The protocol stack processing unit then forwards the second data to the radio frequency unit RRU. And finally, the radio frequency unit RRU feeds the second data back to the user terminal sending the first data. The data communication of the 5G small base station can be realized through the modes of forwarding, interaction and feedback.
Further, the lightweight core network includes:
NGAP signaling interface, which is used to realize the basic access signaling of user terminal;
the authentication module is used for realizing the IMSI authentication of the user terminal;
and the user plane module is used for realizing data routing and forwarding of the user terminal.
Further, the user plane module is provided with an IP address pool;
and the user plane module allocates a fixed IP address to the user terminal according to the IMSI of the user terminal.
It will be appreciated that NGAP is used to provide signalling services between a 5G radio access network (NG RAN) and an AMF network protocol (Action Message Format). NGAP signaling is mainly divided into two categories: user terminal related services and non-user terminal related services. The embodiment of the method provided by the application adopts the user terminal related service of the NGAP signaling. The user terminal related services of the NGAP signaling specifically include: providing signaling and connection for the user terminal; managing a Protocol Data Unit (PDU) session management process and a PDU session related resource management; a user terminal context management process, which specifically comprises the steps of establishing, modifying and releasing a user terminal context; a mobile management flow, switching and path change request is sent to the user terminal; paging process, paging user terminal; and transmitting the NAS information of the uplink and downlink 5G Network Attached Storage (NAS) for a NAS information transmission flow. In the embodiment provided by the present application, the NGAP signaling interface is used to provide signaling and connection for the user terminal, so as to implement basic access signaling of the user terminal.
It is understood that IMSI authentication is collectively referred to as International Mobile Subscriber Identity (IMSI) authentication. Is an identification code that is not repeated in all cellular networks for distinguishing different users in the cellular networks. The handset sends the international mobile subscriber identity IMSI to the network in a 64-bit field. The international mobile subscriber identity IMSI may be used to query a Home Location Register (HLR) or a Visitor Location Register (VLR) for subscriber information. Whenever a user of one mobile network needs to interwork with other mobile networks, the international mobile subscriber identity IMSI must be used.
Specifically, the IMSI is composed of a string of decimal digits, and has a maximum length of 15 digits. The Mobile communication system is formed by sequentially connecting a Mobile Country Code (MCC), a Mobile Network Code (MNC), and a Mobile Subscriber Identification Number (MSIN). The mobile country code MCC is 3 digits long, the mobile network code MNC length is determined by the value of the mobile country code MCC, and the value of the mobile subscriber identification code MSIN is self-assigned by the operator. In this embodiment, the authentication module of this technology is deployed in the lightweight core network of the small base station, so as to implement the international mobile subscriber identity IMSI authentication of the user terminal.
Further, in this embodiment, in order to implement data routing and forwarding of the user terminal, the lightweight core network of the small base station provided in this embodiment is further provided with a user plane module. When the user terminal sends the first data, the radio frequency unit RRU receives the first data and sends the first data to the protocol stack processing unit, and then the protocol stack processing unit sends the first data to the lightweight core network, and the lightweight core network performs routing and forwarding processing on the first data through the user plane module. Similarly, when the lightweight core network sends the first data to the network device for interaction and receives the second data aiming at the first data, the second data is also routed and forwarded by the user plane module.
Specifically, in the embodiment provided in the present application, in order to facilitate the use of the user plane function of the lightweight core network, the user plane module of the embodiment has an IP address pool. It can be understood that, after a user starts a Dynamic Host Configuration Protocol (DHCP), a starting IP address and an ending IP address may be set, thereby forming an address pool, and addresses in the address pool may be dynamically allocated to clients in the network for use. An IP address pool is a segment, or range, of IP that is primarily intended for a particular IP segment.
It should be noted that the dynamic host configuration protocol DHCP is a network protocol for a lan. The method is characterized in that a server controls a range of IP addresses, and a client can automatically obtain the IP address and the subnet mask allocated by the server when logging in the server.
Specifically, in the embodiment provided by the present application, the user plane module of the lightweight core network allocates a fixed IP address to the user terminal according to the international mobile subscriber identity IMSI authenticated by the user terminal through the authentication module deployed in the lightweight core network. That is, the international mobile subscriber identity IMSI in the small base station is bound with the IP address pool of the user plane, so as to implement the allocation of the fixed IP of the user terminal.
Further, the user plane module performs data forwarding through a tunnel interface mode.
Specifically, in the embodiment provided in the present application, in order to implement high-speed forwarding of data, a tunnel interface in an internet protocol is used in the embodiment. It will be appreciated that the essence of tunneling is to transport one network layer protocol over another, with the basic functions of encapsulation and encryption being implemented primarily using network tunneling. Tunneling is a key technology for constructing VPNs. The method is used for simulating a point-to-point path in an IP public network China, and realizes the following two nodes: secure communication between VPN gateways, or between a VPN gateway and a VPN remote user, enables data packets to be transmitted out of a private tunnel over a public network. The basic composition of the tunnel includes: a tunnel start node; a tunnel termination node; IP networks, etc. The embodiment of the application realizes high-speed forwarding of data sent by the user terminal by adopting the tunnel interface technology.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the statement that there is an element defined as "comprising" … … does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (10)

1. A data communication method of a small cell, comprising:
a radio frequency unit receives first data sent by a user terminal;
the radio frequency unit sends the first data to a protocol stack processing unit;
the protocol stack processing unit sends the first data to a lightweight core network deployed in a small base station;
the lightweight core network sends the first data to network equipment for interaction, and receives second data aiming at the first data;
the lightweight core network sends the second data to a protocol stack processing unit;
the protocol stack processing unit sends the second data to the radio frequency unit;
and the radio frequency unit returns the second data to the user terminal.
2. The data communication method of claim 1, wherein the lightweight core network deployed in the small cell is provided with an NGAP signaling interface for implementing a basic access signaling of the user equipment.
3. The data communication method of claim 1, wherein the lightweight core network deployed in the small cell is deployed with an authentication function for implementing IMSI authentication of a user terminal.
4. The data communication method of claim 1, wherein the lightweight core network deployed in the small cell is deployed with a user plane function for implementing data routing and forwarding of a user terminal.
5. The data communication method of the small cell site according to claim 4, wherein the user plane function deployed by the lightweight core network has an IP address pool;
and the user plane function is to allocate a fixed IP address to the user terminal according to the IMSI of the user terminal.
6. The data communication method of the small cell site as claimed in claim 4, wherein the user plane function deployed in the lightweight core network performs data forwarding in a tunnel interface manner.
7. A small cell data communication system, comprising:
the radio frequency unit is used for receiving first data sent by a user terminal;
the protocol stack processing unit is used for receiving the first data sent by the radio frequency unit;
the lightweight core network is used for receiving the first data sent by the protocol stack processing unit;
the lightweight core network sends first data to network equipment and carries out interaction so as to receive second data aiming at the first data;
and the second data is sent to the protocol stack processing unit through the lightweight core network, then sent to the radio frequency unit by the protocol stack processing unit, and finally returned to the user terminal by the radio frequency unit.
8. The small cell site data communication system of claim 7, wherein the lightweight core network comprises:
the NGAP signaling interface is used for realizing the basic access signaling of the user terminal;
the authentication module is used for realizing the IMSI authentication of the user terminal;
and the user plane module is used for realizing data routing and forwarding of the user terminal.
9. The small cell site data communication system of claim 8, wherein the user plane module has a pool of IP addresses;
and the user plane module allocates a fixed IP address to the user terminal according to the IMSI of the user terminal.
10. The femtocell data communication system of claim 8, wherein the user plane module performs data forwarding by a tunnel interface mode.
CN202210471273.9A 2022-04-28 2022-04-28 Data communication method of small base station and data communication system of small base station Pending CN114745814A (en)

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