5G Access Network, Communication System, Communication Method and Storage Medium

Abstract

An embodiment of the present invention provides a 5G access network, a communication system, a communication method, and a storage medium. The internal network 5G access network includes an internal network AAU and an internal network DU that are communicatively connected in sequence. The internal network AUU is configured to receive UE data sent by a UE, decode the received UE data, and send it to the internal network DU. The internal network DU further decodes it to obtain the network identifier in the UE data. When it is determined that the UE sending the UE data is an internal network UE according to the network identifier, the decoded UE data is sent to the internal network 5GC; otherwise, the decoded UE data is encoded to the High-PHY protocol layer and then sent to the internal network AAU. The internal network AAU further encodes the UE data to the NR air interface and sends it to the external network AAU, thereby realizing the traffic splitting of the data of the internal network UE and the external network UE, without the need for superposition networking of the external network and the internal network, nor the need for special distinction of the communication spectra used by the external network and the internal network, with low cost and good versatility.

Description

Technical Field

[0001] The present invention relates to the field of communications, and in particular, to a 5G access network, a communication system, a communication method, and a storage medium. Background Art

[0002] The advent of 5G (5G Network) has opened an era of "Internet of Everything". With the rapid development of the 5G Internet of Things, 5G networks are increasingly widely used in fields such as autonomous driving, vehicle-to-everything (V2X), automated factories, and telemedicine. However, in application scenarios with high security requirements, there are security management requirements for data diversion between the internal network and the external network. Currently, no effective solution has been proposed in the 5G network.

[0003] Therefore, how to achieve data diversion between the internal network and the external network in a 5G network is a technical problem that urgently needs to be solved at present. Summary of the Invention

[0004] The present invention provides a 5G access network, a communication system, a communication method, and a storage medium, which solve the problem of data diversion between the internal network and the external network in a 5G network.

[0005] An internal network 5G access network includes:

[0006] An internal network AAU, which is used for UE access and for receiving UE data sent by the UE, and decoding the received UE data to the Low-PHY protocol layer; the UE includes an internal network UE and an external network UE, and the UE data includes a network identifier indicating whether the UE sending the UE data is an internal network UE or an external network UE; the internal network AAU is also communicatively connected to an external network AAU of an external network 5G access network through an NR air interface;

[0007] An internal network DU, which is used for communicatively connecting to an internal network 5GC and the internal network AAU respectively, and for receiving the UE data decoded to the Low-PHY protocol layer sent by the internal network AAU, and further decoding the UE data to obtain the network identifier in the UE data, and when it is determined that the UE sending the UE data is an internal network UE according to the network identifier, sending the decoded UE data to the internal network 5GC; when it is determined that the UE sending the UE data is an external network UE according to the network identifier, encoding the decoded UE data to the High-PHY protocol layer, and sending the encoded UE data to the internal network AAU;

[0008] The internal network AAU is also used for further encoding the received encoded UE data to the NR air interface, and sending the UE data to the external network AAU through the NR air interface.

[0009] Optionally, the network identifier includes the PLMN code of the UE;

[0010] After receiving the UE data decoded to the Low-PHY protocol layer sent by the internal network AAU, the internal network DU further decodes the UE data through the High-PHY protocol layer and the MAC layer to the RLC layer in sequence, extracts the PLMN code in the further decoded UE data, and determines whether the UE sending the UE data is an internal network UE or an external network UE according to the PLMN code.

[0011] Optionally, the internal network 5G access network further includes a first internal network CU, the internal network DU is communicatively connected to the first internal network CU through a first intermediate transmission interface, and the first internal network CU is used for communicatively connecting to the internal network 5GC;

[0012] When the internal network DU determines that the UE sending the UE data is an internal network UE according to the network identifier, the internal network DU sends the decoded UE data to the first internal network CU through the first intermediate transmission interface;

[0013] The first internal network CU is used for sending the decoded UE data received from the first intermediate transmission interface to the internal network 5GC after being processed by the first PDCP protocol layer and the first RRC protocol layer in sequence.

[0014] Optionally, the internal network 5G access network is composed of the internal network AAU and the internal network DU, the internal network DU is used for communicatively connecting to an external second internal network CU through a second intermediate transmission interface, and the second internal network CU is used for communicatively connecting to the internal network 5GC;

[0015] When the internal network DU determines that the UE sending the UE data is an internal network UE according to the network identifier, the internal network DU sends the decoded UE data to the second internal network CU through the second intermediate transmission interface;

[0016] The second internal network CU is used for sending the decoded UE data received from the second intermediate transmission interface to the internal network 5GC after being processed by the second PDCP protocol layer and the second RRC protocol layer in sequence.

[0017] A 5G access network includes an external network 5G access network and an internal network 5G access network;

[0018] The external network 5G access network includes an external network AAU, an external network DU, and an external network CU that are communicatively connected in sequence, and the external network CU is communicatively connected to the external network 5GC;

[0019] The internal network 5G access network includes an internal network AUU and an internal network DU that are communicatively connected in sequence; the internal network AUU is used for the UE to access, and for receiving UE data sent by the UE, and decoding the received UE data to the Low-PHY protocol layer; the UE includes an internal network UE and an external network UE, and the UE data includes a network identifier indicating whether the UE sending the UE data is an internal network UE or an external network UE; the internal network AAU is also communicatively connected to the external network AAU through the NR air interface;

[0020] The internal network DU is used for communicatively connecting to the internal network 5GC and the internal network AAU respectively, and for receiving the UE data decoded to the Low-PHY protocol layer sent by the internal network AAU, and further decoding the UE data to obtain the network identifier in the UE data. When it is determined according to the network identifier that the UE sending the UE data is an internal network UE, the decoded UE data is sent to the internal network 5GC; when it is determined according to the network identifier that the UE sending the UE data is an external network UE, the decoded UE data is encoded to the High-PHY protocol layer, and the encoded UE data is sent to the internal network AAU;

[0021] The internal network AAU is also used for further encoding the received encoded UE data to the NR air interface, and sending the UE data to the external network AAU through the NR air interface;

[0022] The external network AAU sends the UE data received from the internal network AAU to the external network 5GC through the external network DU and the external network CU in sequence.

[0023] A 5G communication system includes a UE, an internal network 5GC, an external network 5GC, and a 5G access network; the UE includes an internal network UE and an external network UE; the external network CU is communicatively connected to the external network 5GC, and the internal network DU is communicatively connected to the internal network 5GC;

[0024] The internal network AUU is used for the UE to access, and for receiving UE data sent by the UE, and decoding the received UE data to the Low-PHY protocol layer; the UE data includes a network identifier indicating whether the UE sending the UE data is an internal network UE or an external network UE;

[0025] The internal network DU is used to receive the UE data decoded to the Low-PHY protocol layer sent by the internal network AAU, further decode the UE data to obtain the network identifier in the UE data, and when it is determined according to the network identifier that the UE sending the UE data is an internal network UE, send the decoded UE data to the internal network 5GC; when it is determined according to the network identifier that the UE sending the UE data is an external network UE, encode the decoded UE data to the High-PHY protocol layer and send the encoded UE data to the internal network AAU;

[0026] The internal network AAU is further used to further encode the received encoded UE data to the NR air interface and send the UE data to the external network AAU through the NR air interface;

[0027] The external network AAU sends the UE data received from the internal network AAU to the external network 5GC through the external network DU and the external network CU in sequence.

[0028] An internal network 5G access network communication method includes:

[0029] The internal network AAU provides access for the UE and receives the UE data sent by the UE; the UE includes an internal network UE and an external network UE, and the network identifier indicating whether the UE sending the UE data is an internal network UE or an external network UE is included in the UE data;

[0030] The internal network AAU decodes the received UE data to the Low-PHY protocol layer and then sends it to the internal network DU;

[0031] The internal network DU receives the UE data decoded to the Low-PHY protocol layer sent by the internal network AAU and further decodes the UE data to obtain the network identifier in the UE data;

[0032] When the internal network DU determines according to the network identifier that the UE sending the UE data is an internal network UE, it sends the decoded UE data to the internal network 5GC;

[0033] When the internal network DU determines according to the network identifier that the UE sending the UE data is an external network UE, it encodes the decoded UE data to the High-PHY protocol layer and sends the encoded UE data to the internal network AAU;

[0034] The internal network AAU further encodes the encoded UE data received from the internal network DU to the NR air interface and sends the UE data to the external network AAU through the NR air interface.

[0035] Optionally, the network identifier includes the PLMN code of the UE; the intranet DU receives the UE data decoded to the Low-PHY protocol layer sent by the intranet AAU, and further decodes the UE data to obtain the network identifier in the UE data, including:

[0036] After the intranet DU further decodes the UE data through the High-PHY protocol layer and the MAC layer to the RLC layer in sequence, extracts the PLMN code in the further decoded UE data, and determines whether the UE sending the UE data is an intranet UE or an extranet UE according to the PLMN code.

[0037] An intranet 5G access network device, characterized by comprising a memory, a processor, and a communication bus connecting the memory and the processor, the memory storing at least one computer program, and the computer program being called by the processor to execute the intranet 5G access network communication method as described above.

[0038] A computer storage medium, characterized by being applied to an intranet 5G access network device, the computer storage medium storing at least one computer program, and the computer program being called to execute the intranet 5G access network communication method as described above.

[0039] Beneficial effects

[0040] The present invention provides a 5G access network, a communication system, a communication method, and a storage medium. The intranet 5G access network includes an intranet AAU and an intranet DU that are communicatively connected in sequence. The intranet AUU is used to receive UE data sent by a UE, decode the received UE data to the Low-PHY protocol layer, and then send it to the intranet DU. The intranet DU receives the decoded UE data sent by the intranet AAU, and further decodes it to obtain the network identifier in the UE data. When it is determined that the UE sending the UE data is an intranet UE according to the network identifier, the decoded UE data is sent to the intranet 5GC; when it is determined that the UE sending the UE data is an extranet UE, the decoded UE data is encoded to the High-PHY protocol layer, and the encoded UE data is sent to the intranet AAU; the intranet AAU is further used to further encode the received encoded UE data to the NR air interface, and send the UE data to the extranet AAU through the NR air interface, thereby realizing the data shunt of the intranet UE and the extranet UE, and does not require the superposition networking of the extranet and the intranet, which can not only reduce costs, but also does not require special distinction of the communication spectra used by the extranet and the intranet, and has good versatility. Description of the drawings

[0041] Figure 1 It is a schematic diagram of protocol splitting of the 5G access network provided by the embodiment of the present invention;

[0042] Figure 2 Schematic diagram of the internal network 5G access network structure provided by an embodiment of the present invention Figure 1 ;

[0043] Figure 3 Schematic diagram of the internal network 5G access network structure provided by an embodiment of the present invention Figure 2 ;

[0044] Figure 4 Schematic diagram of the internal network 5G access network structure provided by an embodiment of the present invention Figure 3 ;

[0045] Figure 5 Schematic diagram of the internal network 5G access network structure provided by an embodiment of the present invention Figure 4 ;

[0046] Figure 6 Schematic diagram of the internal network 5G access network structure provided by an embodiment of the present invention Figure 5 ;

[0047] Figure 7 Schematic diagram of the 5G access network structure provided by an embodiment of the present invention Figure 1 ;

[0048] Figure 8 Schematic diagram of the 5G access network structure provided by an embodiment of the present invention Figure 2 ;

[0049] Figure 9 Schematic diagram of the 5G communication system structure provided by an embodiment of the present invention Figure 1 ;

[0050] Figure 10 Schematic diagram of the 5G communication system structure provided by an embodiment of the present invention Figure 2 ;

[0051] Figure 11 Schematic diagram of the communication method flow of the internal network 5G access network provided by an embodiment of the present invention. Detailed implementation manners

[0052] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the following further describes the embodiments of the present invention in detail in conjunction with the accompanying drawings through specific implementation manners. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0053] The 5G radio access network consists of three components, namely AAU (Active Antenna Unit), DU (Distributed Unit), and CU (Centralized Unit). The interface protocol between AAU and DU is eCPRI (enhanced Common Public Radio Interface), and the interface protocol between DU and CU is F1 interface protocol.

[0054] In this embodiment, AAU, DU, and CU have multiple protocol splitting schemes. The applicable scenarios and performance gains of different protocol splitting schemes are different, and there are also significant differences in the requirements for parameters such as the bandwidth, transmission delay, and synchronization of the fronthaul interface. Therefore, the protocol splitting schemes of AAU, DU, and CU in this embodiment are not limited to the schemes shown in this embodiment. For the sake of understanding, the following uses an example of the protocol splitting of AAU, DU, and CU for illustration. See Figure 1 as shown, where:

[0055] AAU includes an antenna, an RF layer, and a Low-PHY layer. DU includes an RLC (Radio Link Control) layer, a MAC (Media Access Control) layer, and a High-PHY layer. CU includes a PDCP (Packet Data Convergence Protocol) layer, data, and an RRC (Radio Resource Control) layer.

[0056] In the example of this embodiment, the functions of the Low-PHY layer may include but are not limited to precoding, digital beamforming, IFFT, and CP addition / removal; the complex domain I / Q samples transmitted on the fronthaul interface are all frequency domain data. In some examples, the Low-PHY layer includes a software entity that has a strong correlation with the DSP.

[0057] The RLC layer is located above the MAC layer and is part of L2, providing segmentation and retransmission services for user and control data. In the control plane, the service provided by the RLC to the upper layer is the radio signaling bearer SRB; in the user plane, when the PDCP and BMC protocols are not used by the service, the RLC provides the radio bearer RB to the upper layer; otherwise, the RB service is carried by the PDCP or BMC. Each RLC entity is configured by the RRC (Radio Resource Control), and there are three modes according to the service type: transparent mode TM, unacknowledged mode UM, and acknowledged mode AM.

[0058] The MAC layer belongs to the lower sub-layer of the data link layer in the OSI model and is mainly responsible for controlling and connecting to the physical medium of the physical layer. When sending data, the MAC protocol can first determine whether data can be sent. If it can be sent, some control information will be added to the data, and finally the data and control information will be sent to the physical layer in a specified format. When receiving data, the MAC protocol first determines whether there are transmission errors in the input information. If there are no errors, the control information will be removed and sent to the logical link control layer.

[0059] The functions of the High-PHY layer include but are not limited to encoding and decoding, rate matching, scrambling, modulation and demodulation, and layer mapping. The complex domain I / Q samples transmitted on the fronthaul interface are all frequency domain data. High-PHY may include software entities in L1 that have no direct strong correlation with the DSP.

[0060] The PDCP layer is a radio transmission protocol stack in UMTS. It is responsible for compressing and decompressing the IP header, transmitting user data, and maintaining the sequence number of the radio bearer set up for the lossless radio network service subsystem.

[0061] The RRC layer is the message configuration center and control center of the access layer of the entire radio communication protocol stack. The radio resource control layer can be understood as a common language that both the network and the user terminal should understand.

[0062] In this embodiment, in the specific device implementation of the DU and CU, a combined DU and CU solution or a separated DU and CU solution can be adopted, which can be flexibly selected according to application requirements, and this embodiment does not limit it.

[0063] For ease of understanding, the following in this embodiment Figure 1 The protocol splitting scheme of the AAU, DU, and CU shown is used as an example for illustration. When other protocol splitting schemes are adopted, only corresponding adjustments need to be made according to the specific protocol splitting scheme, and details will not be elaborated here.

[0064] The internal network 5G access network 1 provided in this embodiment is shown in Figure 2 shown, including: internal network AAU11, internal network DU12, where:

[0065] The internal network AAU 11 is used for UE access and for receiving UE data sent by the UE. The internal network AAU 11 in this embodiment is for internal network UEs and external network UEs, that is, both internal network UEs and external network UEs can access the internal network AAU 11, but the internal network UEs have network identifiers that can identify them as internal network UEs. It should be understood that the network identifiers in this embodiment can be flexibly set as long as the internal network DU 12 can effectively distinguish between internal network UEs and external network UEs. For example, in some examples, the network identifier includes the PLMN code of the UE, that is, the PLMN code (Public Land Mobile Network code) of the SIM card used by the UE. By setting the PLMN code of the internal network UE to be different from that of the external network UE, and registering or recording the PLMN code of the internal network UE on the internal network DU 12, the internal network DU 12 can determine whether the UE data is sent by an external network UE or an internal network UE according to the PLMN code included in the UE data.

[0066] In this embodiment, after receiving the UE data sent by the UE, the internal network AAU 11 decodes the received UE data to the Low-PHY protocol layer and then sends it to the internal network DU. For example, it can be sent to the internal network DU through, but not limited to, the eCPRI interface between the two. In this embodiment, the internal network AAU also communicates with the external network AAU of the external network 5G access network through the NR air interface.

[0067] In this embodiment, the internal network DU12 is used to communicate with the internal network 5GC and the internal network AAU11 respectively, and is used to receive the UE data decoded to the Low-PHY protocol layer sent by the internal network AAU11, and further decode the UE data to obtain the network identifier in the UE data. For example, in one example, after the internal network DU12 receives the UE data decoded to the Low-PHY protocol layer sent by the internal network AAU11, the UE data is further decoded to the RLC layer through the High-PHY protocol layer and the MAC layer in sequence, the PLMN code in the further decoded UE data is extracted, and it is determined whether the UE sending the UE data is an internal network UE or an external network UE according to the PLMN code. When it is determined that the UE sending the UE data is an internal network UE according to the extracted network identifier, the decoded UE data is sent to the internal network 5GC; when it is determined that the UE sending the UE data is an external network UE according to the network identifier, the decoded UE data is encoded to the High-PHY protocol layer, and the encoded UE data is sent to the internal network AAU11. The internal network AAU11 is further used to encode the received encoded UE data to the NR air interface, and send the UE data to the external network AAU through the NR air interface, so as to send the UE data to the external network 5GC through the external network AAU, the external network DU and the external network CU, thereby realizing the 5G data shunting of the internal network UE and the external network UE. And there is no need to overlay the external network and the internal network for networking, which can greatly reduce the cost, and there is no need to specifically distinguish the communication spectra used by the external network and the internal network, and the versatility is good, that is, in this embodiment, the internal network UE and the external network UE can use the same communication spectrum, thereby improving the utilization rate of spectrum resources; the internal network UE and the external network UE can also use different communication spectra according to needs to improve flexibility. And when the internal network DU12 determines that the UE data is sent by an external network UE, the decoded UE data is re-encoded to the NR air interface and sent to the external network AAU of the external network 5G access network, without changing the external network architecture, and the implementation is simple, the cost is low and the versatility is good.

[0068] In this embodiment, when the internal network DU12 determines that the received UE data is sent by an internal network UE, the method of sending the decoded UE data to the internal network NGC can be set flexibly. For example, in one example, see Figure 3As shown in the figure, the internal network 5G access network 1 may further include a first internal network CU13 communicatively connected to the internal network DU12. The internal network DU12 and the first internal network CU13 may be communicatively connected through, but not limited to, a first midhaul interface (such as F1). In this embodiment, the first internal network CU13 may be communicatively connected to the internal network NGC through, but not limited to, an Nx interface (such as including, but not limited to, N1 / 2 / 3 interfaces); when the internal network DU12 determines that the received UE data is sent by an internal network UE, it sends the decoded data to the first internal network CU13 through the first midhaul interface. After the first internal network CU13 processes the decoded UE data received from the F1 interface through the first PDCP layer and the first data / RRC layer in sequence, it sends the data to the internal network NGC through the Nx interface. It should be understood that in this embodiment, one first internal network CU13 may be connected to one internal network DU12, or at least two internal network DU12s may be connected according to requirements. See Figure 4 As shown in the figure, and the specific number of the internal network D12s connected can be flexibly set according to the specific application scenario, which will not be elaborated here.

[0069] In another example of this embodiment, see Figure 5 As shown in the figure, the internal network 5G access network 1 is composed of an internal network AAU11 and an internal network DU12. The internal network DU12 is used to be communicatively connected to a second internal network CU2 located outside the internal network 5G access network 1 through a second midhaul interface. The second internal network CU2 is communicatively connected to the internal network NGC through a second Nx interface; when the internal network DU12 determines that the received UE data is sent by an external network UE, it sends the decoded UE data to the second internal network CU2 through the second midhaul interface; the second internal network CU2 is used to process the decoded UE data received from the second midhaul interface through the second PDCP layer and the second data / RRC layer in sequence, and then send the data to the internal network NGC through the second Nx interface. It should be understood that in some application scenarios of this embodiment, the second internal network CU2 may adopt, but not be limited to, the same or similar architecture as the first internal network CU13, which will not be elaborated here. In this way, the second internal network CU2 can be flexibly set outside the internal network 5G access network 1, and the communication architecture is more flexible and can be applied to various application scenarios. It should be understood that in this embodiment, one second internal network CU2 may be connected to one internal network DU12, or at least two internal network DU12s may be connected according to requirements. See Figure 6As shown, the number of internal network D12 specifically connected under a second internal network CU2 can be flexibly set according to specific application scenarios, which will not be elaborated here. In this embodiment, for downlink traffic, such as traffic from the internal network NGC, after the internal network 5G access network 1 receives and decodes it to the RLC layer, it does not need to judge the PLMN and directly delivers it to the access-side RLC for re-encoding and sending to the NR air interface. For traffic from the external network NGC, the external network 5G access network re-encodes it to the NR air interface and sends it using but not limited to existing traffic forwarding methods. Therefore, there is no need to modify the existing external network architecture, and the compatibility is good.

[0070] This embodiment provides a 5G access network that can implement 5G traffic splitting and processing for internal network UEs and external network UEs, which includes an external network 5G access network 3 and the internal network 5G access network 1 shown in the above examples;

[0071] The external network 5G access network 3 includes an external network AAU 31, an external network DU 32, and an external network CU 33. The external network AAU 31 is communicatively connected to the internal network AAU 11 through the NR air interface.

[0072] In one example, refer to Figure 7 As shown, the internal network 5G access network includes an internal network AUU 11, an internal network DU 12, and a first internal network CU 13 that are communicatively connected in sequence; the internal network AUU 12 is used for UEs to access and for receiving UE data sent by UEs, and decoding the received UE data to the Low-PHY protocol layer; the internal network AAU 11 is also communicatively connected to the external network AAU through the NR air interface;

[0073] The internal network DU 12 is used to be communicatively connected to the internal network 5GC and the internal network AAU 11 respectively, and for receiving the UE data decoded to the Low-PHY protocol layer sent by the internal network AAU, and further decoding the UE data to obtain the network identifier (such as the PLMN code) in the UE data. When it is determined that the UE sending the UE data is an internal network UE according to the network identifier, the decoded UE data is sent to the internal network 5GC through the first internal network CU 13; when it is determined that the UE sending the UE data is an external network UE according to the network identifier, the decoded UE data is encoded to the High-PHY protocol layer, and the encoded UE data is sent to the internal network AAU 11; the internal network AAU 11 is also used for further encoding the received encoded UE data to the NR air interface and sending the UE data to the external network AAU 31 through the NR air interface; the external network AAU 31 sends the UE data received from the internal network AAU 11 to the external network 5GC through the external network DU 22 and the external network CU 33 in sequence.

[0074] In another example, refer to Figure 8As shown in the figure, the internal network 5G access network 1 includes an internal network AAU 11 and an internal network DU 12 that are communicatively connected in sequence. The 5G access network further includes a second internal network CU 2 disposed outside the internal network 5G access network 1. The internal network AAU 12 is used for UE access and for receiving UE data sent by the UE, and decoding the received UE data to the Low-PHY protocol layer. The internal network AAU 11 is also communicatively connected to the external network AAU through the NR air interface. The internal network DU 12 is used for communicatively connecting to the internal network 5GC and the internal network AAU 11 respectively, and for receiving the UE data decoded to the Low-PHY protocol layer sent by the internal network AAU, and further decoding the UE data to obtain the network identifier (such as the PLMN code) in the UE data. When it is determined according to the network identifier that the UE sending the UE data is an internal network UE, the decoded UE data is sent to the internal network 5GC through the second internal network CU 2. When the internal network DU 12 determines according to the network identifier that the UE sending the UE data is an external network UE, the decoded UE data is encoded to the High-PHY protocol layer, and the encoded UE data is sent to the internal network AAU 11. The internal network AAU 11 is also used for further encoding the received encoded UE data to the NR air interface, and sending the UE data to the external network AAU 31 through the NR air interface. The external network AAU 31 sends the UE data received from the internal network AAU 11 to the external network 5GC through the external network DU 22 and the external network CU 33 in sequence.

[0075] It should be understood that in some application scenarios, the internal network 5G access network and the external network 5G access network in this embodiment can also be combined into an integrated access network, and only one set of integrated AAU (that is, the external network AAU 31 and the internal network AAU 11 are combined into one AAU) and integrated DU (that is, the external network DU 32 and the internal network DU 12 are combined into one DU) need to be deployed in this integrated access network. The integrated DU is respectively connected to the internal network CU (which can be the first internal network CU 12 or the second internal network CU 2) and the external network CU 33. The integrated AAU receives the UE data sent by the UE and sends it to the integrated DU. The integrated DU judges the UE data. If it is sent by an internal network UE, it is forwarded to the internal network CU and sent to the internal network 5GC through the internal network CU. If it is sent by an external network UE, it is forwarded to the external network CU 33 and sent to the external network 5GC through the external network CU 33. This integrated setting method can further simplify the network architecture of the access network and reduce costs.

[0076] This embodiment also provides a 5G communication system, including a UE, an internal network 5GC, an external network 5GC, and the 5G access network shown above. An example of a 5G communication system is shown in Figure 9As shown in the figure, the 5G communication system includes an internal network AUU11, an internal network DU12, and a first internal network CU13 that are sequentially communicatively connected; the internal network AUU12 is used for the UE6 to access, and for receiving the UE data sent by the UE6, and decoding the received UE data to the Low-PHY protocol layer; the internal network AAU11 is also communicatively connected to the external network AAU31 through the NR air interface; the internal network DU12 is used for communicatively connecting to the internal network 5GC4 and the internal network AAU11 respectively, and for receiving the UE data decoded to the Low-PHY protocol layer sent by the internal network AAU, and further decoding the UE data to obtain the network identifier (such as the PLMN code) in the UE data. When it is determined that the UE6 sending the UE data is an internal network UE according to the network identifier, the decoded UE data is sent to the internal network 5GC4 through the first internal network CU13; when it is determined that the UE6 sending the UE data is an external network UE according to the network identifier, the decoded UE data is encoded to the High-PHY protocol layer, and the encoded UE data is sent to the internal network AAU11; the internal network AAU11 is also used for further encoding the received encoded UE data to the NR air interface, and sending the UE data to the external network AAU31 through the NR air interface; the external network AAU31 sends the UE data received from the internal network AAU11 to the external network 5GC5 through the external network DU22 and the external network CU33 in sequence.

[0077] Another example can be seen in Figure 10 As shown in the figure, the internal network 5G access network 1 includes an internal network AUU11 and an internal network DU12 that are sequentially communicatively connected. The 5G access network also includes a second internal network CU2 located outside the internal network 5G access network 1; the internal network AUU12 is used for the UE6 to access, and for receiving the UE data sent by the UE6, and decoding the received UE6 data to the Low-PHY protocol layer; the internal network AAU11 is also communicatively connected to the external network AAU31 through the NR air interface; the internal network DU12 is used for communicatively connecting to the internal network 5GC and the internal network AAU11 respectively, and for receiving the UE data decoded to the Low-PHY protocol layer sent by the internal network AAU11, and further decoding the UE data to obtain the network identifier. When it is determined that the UE6 sending the UE data is an internal network UE according to the network identifier, the decoded UE data is sent to the internal network 5GC4 through the second internal network CU2; when the internal network DU12 determines that the UE6 sending the UE data is an external network UE according to the network identifier, the decoded UE data is encoded to the High-PHY protocol layer, and the encoded UE data is sent to the internal network AAU11; the internal network AAU11 is also used for further encoding the received encoded UE data to the NR air interface, and sending the UE data to the external network AAU31 through the NR air interface; the external network AAU31 sends the UE data received from the internal network AAU11 to the external network 5GC5 through the external network DU22 and the external network CU33 in sequence.

[0078] For ease of understanding, in the following embodiments, the intra-network 5G access network communication method of the intra-network 5G access network shown in the above example will be used for illustration. Refer to Figure 11 as shown, including:

[0079] S1101: After the intra-network AAU provides access for the UE, it receives the UE data sent by the UE; the UE includes an intra-network UE and an external network UE, and the UE data includes a network identifier indicating whether the UE sending the UE data is an intra-network UE or an external network UE.

[0080] S1102: The intra-network AAU decodes the received UE data to the Low-PHY protocol layer and then sends it to the intra-network DU.

[0081] S1103: The intra-network DU receives the UE data decoded to the Low-PHY protocol layer sent by the intra-network AAU, and further decodes the UE data to obtain the network identifier in the UE data.

[0082] For example, in some examples, the network identifier includes the PLMN code of the UE; the intra-network DU receives the UE data decoded to the Low-PHY protocol layer sent by the intra-network AAU, and further decodes the UE data to obtain the network identifier in the UE data, including: the intra-network DU further decodes the UE data through the High-PHY protocol layer, MAC layer, and then to the RLC layer in sequence, and extracts the PLMN code in the further decoded UE data.

[0083] S1104: The intra-network DU determines whether the UE sending the UE data is an intra-network UE according to the network identifier. If so, go to S1105; otherwise, go to S1106.

[0084] For example, the intra-network DU can determine whether the UE sending the UE data is an intra-network UE or an external network UE according to the PLMN code.

[0085] S1105: The intra-network DU sends the decoded UE data to the intra-network NGC.

[0086] For example, the intra-network DU12 sends the decoded UE data to the first intra-network CU included in the intra-network 5G access network 1; the first intra-network CU processes the received decoded UE data through the PDCP layer and the data / RRC layer in sequence, and then sends it to the intra-network NGC.

[0087] Another example, the intra-network DU sends the decoded UE data to the second intra-network CU located outside the intra-network 5G access network; the second intra-network CU processes the received decoded UE data through the PDCP layer and the RRC layer in sequence, and then sends it to the intra-network NGC.

[0088] S1106: The internal network DU encodes the decoded UE data into the High-PHY protocol layer and sends the encoded UE data to the internal network AAU.

[0089] S1107: The internal network AAU further encodes the encoded UE data received from the internal network DU into the NR air interface and sends the UE data to the external network AAU through the NR air interface.

[0090] S1108: The external network AAU sends the received UE data to the external network 5GC through the external network DU and the external network CU in sequence.

[0091] This embodiment also provides an internal network 5G access network device, which includes a processor, a memory, and a communication bus. Among them: the communication bus is used to realize the connection communication between the processor and the memory; the processor is used to execute one or more computer programs stored in the memory to execute at least one step in the above-mentioned internal network 5G access network communication method.

[0092] This embodiment also provides a computer-readable storage medium, which includes volatile or non-volatile, removable or non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, computer program modules, or other data). Computer-readable storage media include, but are not limited to, RAM (Random Access Memory), ROM (Read-Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory), flash memory, or other memory technologies, CD-ROM (Compact Disc Read-Only Memory), digital versatile disc (DVD), or other optical disc storage, magnetic cassette, tape, magnetic disk storage, or any other medium that can be used to store the desired information and can be accessed by a computer.

[0093] The computer-readable storage medium in this embodiment can be used to store one or more computer programs, and the one or more computer programs stored therein can be executed by the processor to execute at least one step in the above-mentioned internal network 5G access network communication method.

[0094] It can be seen that those skilled in the art should understand that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices, can be implemented as software (which can be realized by computer program code executable by a computing device), firmware, hardware, and their appropriate combinations. In the hardware implementation, the division between the functional modules / units mentioned above does not necessarily correspond to the division of physical components; for example, a physical component can have multiple functions, or a function or step can be executed by the cooperation of several physical components. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or can be implemented as hardware, or can be implemented as an integrated circuit, such as an application-specific integrated circuit.

[0095] In addition, as is well known to those of ordinary skill in the art, a communication medium generally contains computer-readable instructions, data structures, computer program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanisms, and can include any information delivery medium. Therefore, the present invention is not limited to any specific combination of hardware and software.

[0096] The above content is a further detailed description of the embodiments of the present invention in combination with specific implementation manners, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. An internal network 5G access network, characterized in that, Comprising: An internal network AAU, which is used for the UE to access, and for receiving the UE data sent by the UE, and decoding the received UE data to the Low-PHY protocol layer; the UE includes an internal network UE and an external network UE, and the UE data includes a network identifier indicating whether the UE sending the UE data is an internal network UE or an external network UE; the internal network AAU is also communicatively connected to an external network AAU of the external network 5G access network through the NR air interface; An internal network DU, which is used for communicatively connecting to an internal network 5GC and the internal network AAU respectively, and for receiving the UE data decoded to the Low-PHY protocol layer sent by the internal network AAU, and further decoding the UE data to obtain the network identifier in the UE data, and when it is determined that the UE sending the UE data is an internal network UE according to the network identifier, sending the decoded UE data to the internal network 5GC; when it is determined that the UE sending the UE data is an external network UE according to the network identifier, encoding the decoded UE data to the High-PHY protocol layer, and sending the encoded UE data to the internal network AAU; The internal network AAU is also used for further encoding the received encoded UE data to the NR air interface, and sending the UE data to the external network AAU through the NR air interface.

2. The internal network 5G access network according to claim 1, wherein The network identifier includes the PLMN code of the UE; After receiving the UE data decoded to the Low-PHY protocol layer sent by the internal network AAU, the internal network DU further decodes the UE data to the RLC layer through the High-PHY protocol layer and the MAC layer in sequence, extracts the PLMN code in the further decoded UE data, and determines whether the UE sending the UE data is an internal network UE or an external network UE according to the PLMN code.

3. The internal network 5G access network according to claim 1 or 2, characterized in that, The internal network 5G access network further includes a first internal network CU, the internal network DU is communicatively connected to the first internal network CU through a first intermediate transmission interface, and the first internal network CU is used for communicatively connecting to the internal network 5GC; The internal network DU is used for, when it is determined that the UE sending the UE data is an internal network UE according to the network identifier, sending the decoded UE data to the first internal network CU through the first intermediate transmission interface; The first internal network CU is used for sending the decoded UE data received from the first intermediate transmission interface to the internal network 5GC after being processed by the first PDCP protocol layer and the first RRC protocol layer in sequence.

4. The internal network 5G access network according to claim 1 or 2, characterized in that The internal network 5G access network is composed of the internal network AAU and the internal network DU, the internal network DU is used for communicatively connecting to an external second internal network CU through a second intermediate transmission interface, and the second internal network CU is used for communicatively connecting to the internal network 5GC; The internal network DU is used for, when it is determined that the UE sending the UE data is an internal network UE according to the network identifier, sending the decoded UE data to the second internal network CU through the second intermediate transmission interface; The second internal network CU is configured to send the decoded UE data received from the second intermediate transmission interface to the internal network 5GC after processing by the second PDCP protocol layer and the second RRC protocol layer in sequence.

5. A 5G access network, characterized in that, It includes an external network 5G access network and an internal network 5G access network; The external network 5G access network includes an external network AAU, an external network DU, and an external network CU that are communicatively connected in sequence, and the external network CU is communicatively connected to the external network 5GC; The internal network 5G access network includes an internal network AUU and an internal network DU that are communicatively connected in sequence; the internal network AUU is used for UE access and for receiving UE data sent by the UE, decoding the received UE data to the Low-PHY protocol layer; the UE includes an internal network UE and an external network UE, and the UE data includes a network identifier indicating whether the UE sending the UE data is an internal network UE or an external network UE; the internal network AAU is also communicatively connected to the external network AAU through the NR air interface; The internal network DU is used to be communicatively connected to the internal network 5GC and the internal network AAU respectively, and for receiving the UE data decoded to the Low-PHY protocol layer sent by the internal network AAU, and further decoding the UE data to obtain the network identifier in the UE data. When it is determined according to the network identifier that the UE sending the UE data is an internal network UE, the decoded UE data is sent to the internal network 5GC; when it is determined according to the network identifier that the UE sending the UE data is an external network UE, the decoded UE data is encoded to the High-PHY protocol layer, and the encoded UE data is sent to the internal network AAU; The internal network AAU is also used to further encode the received encoded UE data to the NR air interface and send the UE data to the external network AAU through the NR air interface; The external network AAU sends the UE data received from the internal network AAU to the external network 5GC through the external network DU and the external network CU in sequence.

6. A 5G communication system, characterized in that, It includes a UE, an internal network 5GC, an external network 5GC, and a 5G access network as described in claim 5; the UE includes an internal network UE and an external network UE; the external network CU is communicatively connected to the external network 5GC, and the internal network DU is communicatively connected to the internal network 5GC; The internal network AUU is used for the UE to access and for receiving UE data sent by the UE, decoding the received UE data to the Low-PHY protocol layer; the UE data includes a network identifier indicating whether the UE sending the UE data is an internal network UE or an external network UE; The internal network DU is used to receive the UE data decoded to the Low-PHY protocol layer sent by the internal network AAU, further decode the UE data to obtain the network identifier in the UE data, and when it is determined that the UE sending the UE data is an internal network UE according to the network identifier, send the decoded UE data to the internal network 5GC; when it is determined that the UE sending the UE data is an external network UE according to the network identifier, encode the decoded UE data to the High-PHY protocol layer and send the encoded UE data to the internal network AAU; The internal network AAU is further used to further encode the received encoded UE data to the NR air interface and send the UE data to the external network AAU through the NR air interface; The external network AAU sends the UE data received from the internal network AAU to the external network 5GC through the external network DU and the external network CU in sequence.

7. A method for communication in an intranet 5G access network, characterized in that, Comprising: The internal network AAU is for UE access and receives the UE data sent by the UE; the UE includes an internal network UE and an external network UE, and the UE data includes a network identifier indicating whether the UE sending the UE data is an internal network UE or an external network UE; The internal network AAU decodes the received UE data to the Low-PHY protocol layer and then sends it to the internal network DU; The internal network DU receives the UE data decoded to the Low-PHY protocol layer sent by the internal network AAU and further decodes the UE data to obtain the network identifier in the UE data; When the internal network DU determines that the UE sending the UE data is an internal network UE according to the network identifier, it sends the decoded UE data to the internal network 5GC; When the internal network DU determines that the UE sending the UE data is an external network UE according to the network identifier, it encodes the decoded UE data to the High-PHY protocol layer and sends the encoded UE data to the internal network AAU; The internal network AAU further encodes the encoded UE data received from the internal network DU to the NR air interface and sends the UE data to the external network AAU through the NR air interface.

8. The method for intranet 5G access network communication according to claim 7, characterized in that, The network identifier includes the PLMN code of the UE; the internal network DU receives the UE data decoded to the Low-PHY protocol layer sent by the internal network AAU, and the steps for further decoding the UE data to obtain the network identifier in the UE data include: The internal network DU further decodes the UE data to the RLC layer through the High-PHY protocol layer and the MAC layer in sequence, extracts the PLMN code in the further decoded UE data, and determines whether the UE sending the UE data is an internal network UE or an external network UE according to the PLMN code.

9. An internal network 5G access network device, characterized in that, Comprising a memory, a processor, and a communication bus connecting the memory and the processor, the memory stores at least one computer program, and the computer program is for the processor to call to execute the internal network 5G access network communication method as claimed in claim 7 or 8.

10. A computer storage medium, characterized in that, Applied to an intranet 5G access network device, the computer storage medium stores at least one computer program, and the computer program is called for execution of the intranet 5G access network communication method as claimed in claim 7 or 8.

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