Integrated Base Station Networking System Based on DDS

Abstract

The present invention relates to the field of wireless communication technologies, and particularly to an integrated base station networking system based on DDS, which includes distributed networking nodes at the hardware level and a shared UDR module, a shared UDM module, and a data splitting module at the software level; the shared UDR module is used to receive the subscribed terminal information uploaded by each group of networking nodes; each group of networking nodes is used to receive the subscribed terminal information sent by the shared UDR module to perform registration authentication of the access terminals; the shared UDM module is used to receive the registered terminal information uploaded by each group of networking nodes; each group of networking nodes is also used to receive the registered terminal information sent by the shared UDM module to perform access handover of the terminals among the internal nodes of the network; the data splitting module is used to process the IP data packets uploaded by each group of networking nodes, obtain the destination address and port information, obtain the data packet type according to the destination address and port information, and forward according to the data packet type. By adopting this solution, the stability of the networking system and the rapid access of the terminals can be improved.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technologies, and particularly to an integrated base station networking system based on DDS. Background Art

[0002] The 5G integrated base station has advantages such as a small volume, convenient engineering construction, and a certain ability to prevent damage from moisture, dust, and salt spray outdoors, and is particularly suitable for special communication scenarios such as mines, tunnels, and the wild. The integrated base station can quickly cover a certain area to meet its communication needs. However, if the area to be covered is large and a single integrated base station cannot meet the coverage requirements of the area, multiple integrated base stations are required to meet the coverage needs.

[0003] In the prior art, the novel integrated base station self-organizing network system and method based on 5G with the publication number CN113810911A disclose the following content: Multiple self-organizing network nodes are connected through a self-defined self-organizing network air interface to form an upstream-downstream relationship, constituting a novel integrated base station self-organizing network system. It adopts a networking method of parent and child nodes, and there must be a master node base station for the lower-layer nodes to access as terminals. If the master node base station has problems, the entire network function will fail, and the stability of the system is relatively low. At the same time, if the user terminal leaves the coverage range of the registered node base station, it cannot access from other node base stations. Summary of the Invention

[0004] The present invention aims to provide an integrated base station networking system based on DDS to improve the stability of the networking system and the fast access of terminals.

[0005] The present invention provides the following basic solution:

[0006] An integrated base station networking system based on DDS includes distributed networking nodes at the hardware level and a shared UDR module, a shared UDM module, and a data shunting module at the software level;

[0007] The networking nodes include integrated base stations, a 5G core network, and user front-end devices. The user front-end devices of each networking node are communicatively connected to the integrated base stations of other networking nodes to build a network;

[0008] The shared UDR module is used to receive the subscribed terminal information uploaded by each local networking node; each networking node is used to receive the subscribed terminal information sent by the shared UDR module for registration authentication of access terminals;

[0009] The shared UDM module is used to receive the registered terminal information uploaded by each networking node; each networking node is also used to receive the registered terminal information sent by the shared UDM module for access switching of the terminal between internal nodes of the network;

[0010] The data splitting module is used to process the IP data packets uploaded by each networking node, obtain the destination address and port information, obtain the data packet type according to the destination address and port information, and forward the data packet according to the data packet type.

[0011] Name description: DDS stands for Data Distribution Service, which refers to the data distribution service; UDR stands for Universal Data Repository, which refers to the unified data storage; UDM stands for Unified Data Management, which refers to the unified data management.

[0012] Beneficial effects of the basic solution:

[0013] 1. Compared with the prior art, the networking nodes in this application adopt a distributed connection and there is no subordinate relationship. When a networking node has a problem, other networking nodes can still work normally, thereby improving the stability of the operation of the networking system and ensuring the reliability of communication.

[0014] 2. Compared with the prior art, in this application, the user terminal can register and connect with any base station within the networking range, that is, it can register and connect on any networking node. When the user terminal moves, for example, when it leaves the coverage range of the registered networking node, it will adaptively access other networking nodes, effectively improving the coverage range and networking speed of the integrated base station.

[0015] 3. The setting of the data splitting module performs splitting processing through the user plane data itself. Compared with the prior art, there is no need to add new cells to distinguish ordinary terminals and nodes, and the data transmission speed is faster.

[0016] Furthermore, the user front-end device includes a 5G module and a wired module. The 5G module is used to access the integrated base stations of other networking nodes, and the wired module is communicatively connected to the 5G core network.

[0017] Beneficial effects: The setting of the 5G module realizes networking with other networking nodes, and the setting of the wired module realizes access to the 5G core network.

[0018] Furthermore, the integrated base station includes an active antenna unit, a distributed unit, and a centralized unit.

[0019] Beneficial effects: All functions of the 5G access network are realized thereby.

[0020] Furthermore, the data packet types include this node terminal packets, connected node terminal packets, and shared UDR / UDM lower-layer data packets.

[0021] Beneficial effects: The splitting processing of the user plane data is realized thereby.

[0022] Further, the 5G core network includes a UDM network element and a UDR network element. The UDR network element is used to upload the subscribed terminal information, and the UDM network element is used to receive the subscribed terminal information sent by the shared UDR module. The UDM network element is also used to upload the registered terminal information and to receive the registered terminal information sent by the shared UDM module.

[0023] Beneficial effects: The setting of the UDM network element and the UDR network element enables information interaction with the shared UDR module and the shared UDM module.

[0024] Further, the 5G core network further includes an AUSF network element. When a terminal of a non-networked node accesses, the AUSF network element sends a data request to the UDM network element of this networking node, and the UDM network element is also used to search for subscribed authentication information from the UDR network element of this networking node to perform registration authentication on the accessing terminal.

[0025] Term explanation: The full name of AUSF is Authentication Server Function, which refers to the authentication service function.

[0026] Beneficial effects: The setting of the AUSF network element can perform registration authentication on the accessing terminal by searching for subscribed authentication information when a terminal of a non-networked node accesses.

[0027] Further, the UDM network element is also used to receive the data in the shared UDR module and save it in the cache, and is also used to search for subscribed authentication information in the cache to perform registration authentication on the accessing terminal.

[0028] Beneficial effects: By caching data in the UDM network element, the search for subscribed authentication information is realized, so as to realize the registration authentication of the accessing terminal.

[0029] Further, the 5G core network includes an N6 interface and a UPF network element. The data diversion module is used to receive IP data packets, parse the destination address of the IP data packets. When the destination address is the node CPE IP, the IP data packets are forwarded to the next networking node through the user-premise equipment; when the destination address is the local UE IP, the IP data packets are forwarded to the UPF network element through the N6 interface.

[0030] Term explanation: The full name of UPF is User Plane Function, which refers to the user plane function; the full name of CPE is Customer Premise Equipment, which refers to the user-premise equipment; the full name of UE is User Equipment, which refers to the user terminal.

[0031] Beneficial effects: The IP data packets are obtained through the N6 interface or can also be introduced through the IP network. By parsing the IP data packets, the destination address is obtained, and based on the destination address, corresponding forwarding actions are taken on the data to realize the diversion processing of the data. Description of the Drawings

[0032] Figure 1 FIG. is a networking schematic diagram of an embodiment of the integrated base station networking system based on DDS of the present invention;

[0033] Figure 2 FIG. is a schematic diagram of the UE access and handover process of an embodiment of the integrated base station networking system based on DDS of the present invention;

[0034] Figure 3 FIG. is a schematic diagram of the data transmission process of an embodiment of the integrated base station networking system based on DDS of the present invention. Detailed Description of the Invention

[0035] The following is a further detailed description through specific embodiments:

[0036] Embodiment

[0037] The integrated base station networking system based on DDS includes distributed networking nodes at the hardware level and a shared UDR module, a shared UDM module, and a data splitting module at the software level. One networking node can be connected to multiple networking nodes, and multiple networking nodes are connected below the network layer through distribution, and a networking system is formed through the upper-layer shared UDR module, shared UDM module, and data splitting module.

[0038] The networking node includes an integrated base station, a 5G core network, and a user front-end device. The user front-end device of each networking node is communicatively connected to the integrated base station of other networking nodes to build a network.

[0039] The integrated base station (also known as GNB, full name the next Generation Node B) includes an active antenna unit, a distributed unit, and a centralized unit.

[0040] The 5G core network includes a UDM network element, a UDR network element, an AUSF network element, a UPF network element, and other complete 5G core network elements. The 5G core network also includes an N3 interface and an N6 interface.

[0041] The user front-end device includes a 5G module and a wired module. The 5G module is used to access the integrated base station of other networking nodes, and the wired module is communicatively connected to the 5G core network.

[0042] The shared UDR module is located above the network layer. The UDP protocol is used in the transport layer, and the DDS / RTPS protocol is used in the application layer. The shared UDR module is used to receive the subscribed terminal information uploaded by each local networking node; each networking node is used to receive the subscribed terminal information sent by the shared UDR module for the registration authentication of access terminals. Specifically, the UDR network element is used to upload the subscribed terminal information, and the UDM network element is used to receive the subscribed terminal information sent by the shared UDR module.

[0043] The shared UDM module is located above the network layer. The UDP protocol is used in the transport layer, and the DDS protocol is used in the application layer. The shared UDM module is used to receive the registered terminal information uploaded by each networking node; each networking node is also used to receive the registered terminal information sent by the shared UDM module for the access handover of the terminal between the internal nodes of the network. Specifically, the UDM network element is also used to upload the registered terminal information and is also used to receive the registered terminal information sent by the shared UDM module.

[0044] The data diversion module is used to process the IP data packets uploaded by each networking node, obtain the destination address and port information, obtain the data packet type according to the destination address and port information, and forward according to the data packet type. The data packet types include the terminal packet of this node, the terminal packet of the connected node, and the lower-layer data packet of the shared UDR / UDM.

[0045] Taking 4 networking nodes as an example, the networking of the networking nodes is as shown in the appendix Figure 1 as follows Figure 1 The explanations of the terms are as follows:

[0046] The full name of CPE is Customer Premise Equipment, which refers to the user premise equipment; the full name of 5GC is 5G Core, which refers to the 5G core network; the full name of GNB is the next Generation Node B, which refers to the integrated base station in this embodiment.

[0047] Networking pre-preparation:

[0048] The 5G core network also includes a core network local database. Each networking node obtains the IMSI (full name: International Mobile Subscriber Identity) information of the SIM (full name: Subscriber Identity Module) card of the CPE, and respectively enters it into the core network local databases of other networking nodes. After all networking nodes are started, the nodes automatically search for the networking node with the strongest surrounding signal and initiate random access. After successful random access and registration between networking nodes, a fixed IP address is assigned to them. This address cannot be occupied by ordinary UEs (full name: User Equipment), and is used as the identifier of this networking node.

[0049] The first access process of the UE is as shown in the appendix Figure 2 as follows Figure 2 The descriptions of the terms are as follows

[0050] The full name of UDR is Universal Data Repository, which refers to unified data storage; gNB is equivalent to GNB; the full name of AMF is Access and Mobility Management Function, which is the access and mobility management function; the full name of AUSF is Authentication Server Function, which refers to the authentication service function; the full name of UDM is Unified Data Management, which refers to unified data management; LOCAL gNB in this embodiment refers to the local integrated base station, that is, the integrated base station of this networking node. Similarly, other meanings can be known. NEW gNB in this embodiment refers to the newly accessed integrated base station, that is, the integrated base station of the new networking node; data_writer refers to data writing, and data_reader refers to data reading

[0051] The UDM network element of each networking node calls the DDS (the full name is Data Distribution Service, which refers to the data distribution service) service interface, and sends the SIM authentication data of this networking node to the shared UDM module through the data_writer function of DDS at a preset sending frequency

[0052] When the AUSF network element is used for the access of the terminal of the non-networking node, it sends a data request to the UDM network element of this networking node. The UDM network element is also used to search for the subscribed authentication information from the UDR network element of this networking node to perform registration authentication on the access terminal. The UDM network element is also used to receive the data in the shared UDR module and save it in the cache, and is also used to search for the subscribed authentication information in the cache to perform registration authentication on the access terminal. Specifically

[0053] For the access of the terminal of the non-networking node, it is the same as the access process of the networking node CPE. When registering, it first sends a data request to the UDM network element inside this networking node through the AUSF network element to complete the authentication process. The local UDM network element searches for the SIM subscribed authentication information in two ways: a. Query in the local UDR network element; b. Receive the data in the shared UDR module through the data_reader function of DDS and save it in the cache, and query the subscribed authentication information in the cache

[0054] The UE handover node process

[0055] When the UE successfully passes the authentication and registration, the UDM network element of each networking node calls the DDS service interface and sends the registered terminal information of the networking node to the shared UDM module through the Data_Writer function of DDS at another preset sending frequency.

[0056] When the UE leaves the coverage of the current networking node and accesses another networking node, it initiates a registration request to the core network of the new networking node. At this time, the UDM network element of the new networking node will receive the data in the shared UDM module through the Data_Reader function and save it in the cache. When the AUSF network element of the new networking node performs registration authentication, it directly queries the information in the cache for authentication. If no relevant information is found, the UE's first access process is carried out.

[0057] Shared UDR / UDM lower layer data transmission process, as shown in the attached Figure 3 As shown, Figure 3 The nouns in Chinese are explained as follows:

[0058] UPF stands for User Plane Function, which refers to the user plane function; GTPU stands for GPRS Tunneling Protocol User Plane, which refers to the GPRS tunneling protocol for user plane data; UDP stands for User Datagram Protocol, which refers to the user datagram protocol. In this embodiment, the UDP layer is the transport layer.

[0059] The UDM / UDR data received by each network node is connected to the data offload module via the N3 port. A specific port number is set at the UDP layer to distinguish it from other data packets. The data offload module parses the N3 GTPU packets. If the port number matches the specified value, it forwards them directly to the UDM / UDR network element of the network node. The data offload module also receives UDP packets with a specific port number from the UDM / UDR network element of the network node, forwards them to the N3 port, encapsulates them into GTPU packets, and forwards them via the downlink.

[0060] User plane data transmission process:

[0061] After the UE successfully passes the authentication and registration, data is transmitted through the 5G core network of this networking node. For each networking node, which may be connected to the UE or to other networking node CPEs, a data diversion module is used to process the IP data packets uploaded by the 5G core network.

[0062] The data distribution module is used to receive IP data packets, parse the destination address of the IP data packets, and when the destination address is the node CPE IP, forward the IP data packets to the next group of network nodes through the user front-end device; when the destination address is the local UE IP, forward the IP data packets to the UPF network element through the N6 port. Specifically:

[0063] In a networking node, for uplink data, user plane data is uploaded to the data distribution module through the N6 port, and the destination IP address of the IP data packet is parsed. If the destination IP address is the node CPE IP, the data is forwarded to the next networking node through the CPE. If it is the IP address of a locally connected UE, it is directly forwarded to the UPF downlink through the N6 port.

[0064] For downlink data, user plane data is transmitted to the data distribution module through the IP network, and the destination IP address of the IP data packet is parsed. If the destination IP address is the node CPE IP, the data is forwarded to the next networking node through the CPE. If it is the IP address of a locally connected UE, it is directly forwarded to the UPF downlink of this networking node through the N6 port.

[0065] The above is only an embodiment of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the field are aware of all common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the field can improve and implement this scheme in combination with their own abilities under the inspiration given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An integrated base station networking system based on DDS, characterized in that: It includes distributed networking nodes at the hardware level and shared UDR modules, shared UDM modules, and data splitting modules at the software level; The networking nodes include integrated base stations, 5G core networks, and user-premises equipment. The user-premises equipment of each group of networking nodes is communicatively connected to the integrated base stations of other networking nodes to form a network; The shared UDR module is used to receive the subscribed terminal information uploaded by each group of networking nodes; Each group of networking nodes is used to receive the subscribed terminal information sent by the shared UDR module for registration authentication of access terminals; The shared UDM module is used to receive the registered terminal information uploaded by each group of networking nodes; Each group of networking nodes is also used to receive the registered terminal information sent by the shared UDM module for access handover of terminals between internal nodes of the network; The data splitting module is used to process the IP data packets uploaded by each group of networking nodes, obtain the destination address and port information, obtain the data packet type according to the destination address and port information, and forward according to the data packet type.

2. The integrated base station networking system based on DDS according to claim 1, wherein: The user-premises equipment includes a 5G module and a wired module. The 5G module is used to access the integrated base stations of other networking nodes, and the wired module is communicatively connected to the 5G core network.

3. The integrated base station networking system based on DDS according to claim 1, characterized in that: The integrated base station includes an active antenna unit, a distributed unit, and a centralized unit.

4. The integrated base station networking system based on DDS according to claim 1, characterized in that: The data packet types include terminal packets of this node, terminal packets of connected nodes, and lower-layer data packets of shared UDR / UDM.

5. The integrated base station networking system based on DDS according to claim 1, wherein: The 5G core network includes a UDM network element and a UDR network element. The UDR network element is used to upload subscribed terminal information, and the UDM network element is used to receive the subscribed terminal information sent by the shared UDR module; The UDM network element is also used to upload registered terminal information and is also used to receive the registered terminal information sent by the shared UDM module.

6. The integrated base station networking system based on DDS according to claim 5, characterized in that: The 5G core network also includes an AUSF network element. When a terminal of a non-networking node accesses, the AUSF network element sends a data request to the UDM network element of this group of networking nodes, and the UDM network element is also used to search for subscribed authentication information from the UDR network element of this group of networking nodes to perform registration authentication on the access terminal.

7. The integrated base station networking system based on DDS according to claim 6, wherein: The UDM network element is also used to receive the data in the shared UDR module and store it in the cache, and is also used to search for subscribed authentication information in the cache to perform registration authentication on the access terminal.

8. The integrated base station networking system based on DDS according to claim 1, wherein: The 5G core network includes an N6 interface and a UPF network element. The data splitting module is used to receive IP data packets and parse the destination address of the IP data packets. When the destination address is the node CPE IP, the IP data packets are forwarded to the next group of networking nodes through the user-premises equipment; when the destination address is the local UE IP, the IP data packets are forwarded to the UPF network element through the N6 interface.

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