Service priority guarantee method for relay access of ad hoc network terminal

Abstract

The invention belongs to the field of 5G communication, and particularly relates to a service priority guarantee method for relay access of an ad hoc network terminal. According to the method provided by the invention, the N3IWF network element performs packet detection on high-priority services such as voice services of the ad-hoc network terminal, and when a voice SIP signaling initiated by the ad-hoc network terminal is detected, the instruction for creating the proprietary stream is sent to the PCF network element where the relay terminal is located, so that the proprietary stream is triggered to be established between the relay terminal and the 5G base station as well as between the relay terminal and the 5G core network; and the voice service of the ad hoc network terminal can be transmitted preferentially. According to the service priority guarantee method for relay access of the ad hoc network terminal, the no-3GPP access technology of the 3GPP and the ADC technology are effectively combined, the high-priority service transmission guarantee problem of a specific user is solved under a relay access framework of a private network application scene, and the service priority guarantee method for relay access of the ad hoc network terminal is realized. The whole system has the end-to-end differentiated data transmission capability under the ad hoc network and 5G network fusion networking, and the user experience is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the field of 5G communications, and specifically relates to a service priority guarantee method for self-organizing network terminal relay access. Background Art

[0002] Wireless ad hoc network is a portable communication method. In the absence of any network environment, it can quickly build a decentralized network environment without relying on traditional infrastructure such as conventional computer room networks. Whether in line-of-sight or non-line-of-sight conditions, the ad hoc network system can simply network and transmit front-end voice, video, and data. It is one of the important wireless communication methods for current private networks.

[0003] However, limited by the distance and bandwidth of wireless transmission in ad hoc networks, the current ad hoc networking mode of private networks is increasingly unable to adapt to complex and changing application scenarios. The ultra-long distance, large bandwidth, low latency, and high mobility inherent in 5G networks can perfectly make up for the shortcomings of current private networks. Therefore, 5G empowers private network ad hoc networks and is increasingly recognized and being widely verified. Due to the limited air interface resources of 5G networks, how to ensure that high-priority services of high-priority users of ad hoc network terminals are preferentially transmitted in 5G networks is particularly important in private network applications.

[0004] At present, the relay access of ad hoc network in private network refers to the no-3GPP access process of 3GPP protocol. The ad hoc terminal is a dual-mode terminal (supporting both ad hoc mode and 5G mode). When it is detected that 5G mode is unavailable, it switches to ad hoc mode. At this time, if the terminal needs to communicate with the service server on the 5G core network side, then the terminal (remote terminal) needs to be securely accessed to the 5G network. Since the terminal has no 5G access, it needs to access the 5G network with the help of other terminals (relay terminals) in the same ad hoc network. First, the relay terminal uses the 5G mode to access the 5G network according to the standard 5G access process, and the session is successfully established; secondly, the remote terminal establishes an IpSec tunnel with the core network element N3IWF through the relay terminal; then, the remote terminal includes the signaling in the IpSec tunnel, interacts with N3IWF through the session established by the relay terminal, and N3IWF interacts with other network elements of the core network to complete the registration and session establishment process; finally, the remote terminal service data is encapsulated in the IpSec tunnel, sent to N3IWF through the session established by the relay terminal, and then sent to the service server through the core network UPF. In this process, the service data is always transmitted using the default bearer of the relay terminal, and the service priority cannot be distinguished. Summary of the invention

[0005] In order to solve the problem of the transmission priority of service data of self-organizing network terminals in 5G networks, the present invention provides a service priority guarantee method for relay access of self-organizing network terminals. This method uses the N3IWF network element to perform packet detection on high-priority services of remote terminals, such as voice services, and sends a command to create a dedicated flow to the PCF network element when the SIP signaling of the voice is detected, thereby triggering the establishment of a dedicated flow between the relay terminal and the 5G base station and the 5G core network, ensuring the priority transmission of the voice service of the remote terminal.

[0006] The present invention is implemented by the following technical solutions:

[0007] A service priority guarantee method for relay access of a self-organizing network terminal is implemented based on a self-organizing network terminal, a relay terminal, a base station, a core network where the relay terminal is located, and a core network where the self-organizing network terminal is located, wherein the core network where the self-organizing network terminal is located includes N31WF, CP and UP, CP includes AMF and SMF network elements, UP includes UPF network element, and includes the following steps:

[0008] Step 1: Configure high-priority users and corresponding high-priority services in N3IWF through the network management system;

[0009] Step 2: The relay terminal uses the 5G mode to access the core network where the relay terminal is located through the base station and establish a session;

[0010] Step 3: The self-organizing network terminal establishes an IpSec tunnel with the N3IWF in the core network; wherein the IpSec tunnel related messages are relayed and forwarded through the relay terminal;

[0011] Step 4: The self-organizing network terminal uses the self-organizing network mode to access the core network where the self-organizing network terminal is located through the relay terminal relay and establish a session;

[0012] Step 5: When the self-organizing network terminal performs voice services, the SIP message is encapsulated in the IPSec tunnel and forwarded to the N3IWF through the resources allocated by the relay terminal;

[0013] Step 6: N3IWF searches for the context through the IpSec tunnel information. After matching the user as a high-priority user, it strips off the IpSec tunnel information and identifies the service as SIP signaling, that is, voice service. Then it uses the GTP tunnel to forward the SIP signaling to the UP of the core network. The UP removes the GTP header and sends the SIP signaling to the IMS server.

[0014] Step 7: After matching the high-priority service of the high-priority user in step 6, N3IWF performs signaling interaction with the core network where the relay terminal is located, and requests to initiate a dedicated flow establishment process;

[0015] Step 8: The core network where the relay terminal is located triggers the dedicated flow establishment process, and establishes a dedicated flow between the relay terminal, the base station and the core network where the relay terminal is located based on the current session of the relay terminal;

[0016] Step 9: After the SIP signaling interaction between the ad hoc network terminal and the IMS server is completed, voice data exchange begins, and the voice uses the AMR encoding method.

[0017] Furthermore, the specific process of step 4 is as follows:

[0018] Step 401, the ad hoc network terminal encapsulates the signaling interaction between the terminal and the core network in the established IpSec tunnel, and sends it to the relay terminal through the ad hoc network data plane protocol;

[0019] Step 402, the relay terminal uses a radio bearer and a GTP tunnel to send the IPSec data of the ad hoc network terminal including the NAS signaling to the core network where the relay terminal is located;

[0020] Step 403: After receiving the relevant data, the core network where the relay terminal is located forwards it to the N3IWF of the core network where the ad hoc network terminal is located. The N3IWF removes the IpSec header and uses the NAS signaling of the ad hoc network terminal to interact with the CP and UP of the core network.

[0021] Step 404: The NAS signaling generated by the core network where the self-organizing terminal is located is encapsulated in the IPSec tunnel in the N3IWF, and is sent to the base station via the GTP tunnel of the core network where the relay terminal is located. The base station uses the corresponding radio bearer to forward the data to the relay terminal.

[0022] Step 405, the relay terminal forwards the IPSec data to the self-organizing terminal through the self-organizing data plane protocol, thereby completing the self-organizing terminal relay network access; the data path between the self-organizing terminal and the core network is opened.

[0023] Furthermore, the specific process of step 9 is as follows:

[0024] For uplink data, the MANET terminal encapsulates the AMR packet in the IpSec tunnel, and the IP header uses a DSCP value different from that of the data, and sends it to the relay terminal through the MANET data plane protocol; when the relay terminal forwards the AMR packet, it matches it to the proprietary flow, and uses the allocated data bearer resources to send the IpSec data to the core network where the base station and the relay terminal are located; the core network where the relay terminal is located then forwards the IpSec data to the N3IWF; the N3IWF strips off the IpSec header, and uses the session tunnel information of the MANET terminal to forward the AMR packet to the UP of the core network where the MANET terminal is located, and the UP removes the GTP header and sends the AMR packet to the IMS server;

[0025] For downlink data, the IMS server forwards the AMR data packets of other terminals to the UP of the core network where the self-organizing terminal is located through the N6 port; the UP of the core network where the self-organizing terminal is located uses the session tunnel information of the self-organizing terminal to forward the AMR packet to the N3IWF; the N3IWF adds an IpSec header and adds a DSCP value to the IpSec header, and forwards the data to the core network where the relay terminal is located; the core network where the relay terminal is located matches the IP address information and DSCP value in the IpSec header to the proprietary flow, and uses the data bearer resources allocated for the proprietary flow to send the IpSec data to the relay terminal through the base station; the relay terminal uses the self-organizing network data plane protocol to forward the IpSec data to the self-organizing terminal; after receiving the data, the self-organizing terminal removes the IpSec header and performs relevant processing on the original AMR data.

[0026] The present invention has the following beneficial technical effects:

[0027] The service priority guarantee method for relay access of self-organizing network terminals provided by the present invention effectively combines the no-3GPP access technology of 3GPP and the ADC technology, and solves the problem of high-priority service transmission guarantee for specific users under the relay access framework of private network application scenarios, so that the entire system has the ability of end-to-end differentiated data transmission under the converged networking of self-organizing networks and 5G networks, which greatly improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is the self-organizing network terminal relay access network architecture of the embodiment of the present invention.

[0029] Figure 2 The present invention is a flowchart of a remote terminal service priority guarantee process according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The present invention is described in further detail below.

[0031] like Figure 1 As shown in the figure, the self-organizing network terminal (remote terminal) interacts with the core network through the data plane channel of the relay terminal. N3IWF is regarded as the DN of the core network where the relay terminal is located, and is connected to the CP and UP functions of the core network where the remote terminal is located through the N2 and N3 interfaces respectively. The CP function includes network elements such as AMF and SMF, and the UP function includes the UPF network element.

[0032] A service priority guarantee method for relay access of a self-organizing network terminal Figure 2 As shown, the following steps are included:

[0033] Step 1: Configure high-priority users and corresponding high-priority services (such as voice services) information in N3IWF through the network management.

[0034] Step 2: The relay terminal uses the 5G mode to access the core network where the relay terminal is located through the base station and establishes a session (the core network configures 5QI=7, QFI=5 for the session).

[0035] Step 3: The remote terminal establishes an IpSec tunnel with the N3IWF in the core network; wherein the IpSec tunnel related messages are relayed and forwarded through the relay terminal.

[0036] Step 4: The remote terminal uses the self-organizing network mode to access the core network where the remote terminal is located through the relay terminal relay, and establishes a session (5QI=8, QFI=6).

[0037] The specific process of step 4 is as follows: the remote terminal encapsulates the signaling interaction between the remote terminal and the core network in the established IpSec tunnel, and sends it to the relay terminal through the ad hoc data plane protocol; when the relay terminal processes the IpSec data containing NAS signaling of the remote terminal, it uses the wireless bearer and GTP tunnel with QFI=5 to send the IpSec data to the core network where the relay terminal is located; after receiving the relevant data, the core network where the relay terminal is located forwards it to the N3IWF of the core network where the remote terminal is located. The N3IWF removes the IpSec header and uses the NAS signaling of the remote terminal to communicate with the CP and UP interaction; the NAS signaling generated by the core network where the remote terminal is located completes the IpSec tunnel encapsulation in N3IWF, and is sent to the base station through the GTP tunnel with QFI=5 in the core network where the relay terminal is located. The base station uses the wireless bearer corresponding to QFI=5 to forward the data to the relay terminal; the relay terminal forwards the IpSec data to the remote terminal through the self-organizing network data plane protocol, thereby completing the remote terminal relay access to the network. At this time, the core network allocates QFI 6 to the session where the remote terminal is located; the data path between the remote terminal and its core network is successfully opened through this process, and business data transmission can be carried out.

[0038] Step 5: When the remote terminal performs voice service, it first needs to initiate SIP registration to the IMS server. The SIP message is encapsulated in the IPSec tunnel and forwarded to the N3IWF through the resources allocated by the relay terminal for the flow with 5QI=7.

[0039] Step 6: N3IWF searches for the context through the IpSec tunnel information. After matching the user as a high-priority user, it strips off the IpSec tunnel information and identifies the service as SIP signaling, that is, voice service. Then N3IWF uses the GTP tunnel with QFI=6 to forward the SIP signaling to the UP of this core network. The UP removes the GTP header and sends the SIP signaling to the IMS server.

[0040] Step 7: After matching the high-priority service of the high-priority user in step 6, N3IWF performs signaling interaction with the core network where the relay terminal is located, requesting to initiate a dedicated flow establishment process, where the matching rule of the dedicated flow is: localIP = remote terminal address, DSCP = 8.

[0041] Step 8: The core network where the relay terminal is located triggers the dedicated flow establishment process. Based on the current session of the relay terminal, a dedicated flow is established between the relay terminal, the base station and the core network where the relay terminal is located, with 5QI=1 and QFI=7.

[0042] Step 9: After the SIP signaling interaction between the remote terminal and the IMS server is completed, voice data exchange begins, and the voice is encoded using AMR.

[0043] The specific process of step 9 is as follows:

[0044] For uplink data, the remote terminal encapsulates the AMR packet in the IpSec tunnel (the IP header uses a DSCP value different from that of the data, DSCP=8); when the relay terminal forwards the AMR packet, it matches it to the dedicated flow, and uses the data bearer resources allocated for 5QI=1 to send the IpSec data to the base station and the core network where it is located, thereby ensuring that high-priority voice service data transmission resources are scheduled first; the core network where the relay terminal is located then forwards the data to the N3IWF of the core network where the remote terminal is located; the N3IWF strips off the IpSec header and uses the remote terminal's session tunnel information QFI=6 to forward the AMR packet to the UP of the core network where the remote terminal is located, and the UP removes the GTP header and sends the AMR packet to the IMS server.

[0045] For downlink data, the IMS server forwards the AMR data packets of other terminals to the UP of the core network where the self-organizing terminal is located through the N6 port; the UP of the core network where the self-organizing terminal is located uses the session tunnel information of the self-organizing terminal to forward the AMR packet to the N3IWF; the N3IWF adds an IpSec header and adds a DSCP value to the IpSec header, and forwards the data to the core network where the relay terminal is located; the core network where the relay terminal is located matches the IP address information and DSCP value in the IpSec header to the proprietary flow, and uses the data bearer resources allocated for the proprietary flow to send the IpSec data to the relay terminal through the base station; the relay terminal uses the self-organizing network data plane protocol to forward the IpSec data to the self-organizing terminal; after receiving the data, the self-organizing terminal removes the IpSec header and performs relevant processing on the original AMR data.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A service priority guarantee method for relay access of a self-organizing network terminal, which is implemented based on a self-organizing network terminal, a relay terminal, a base station, a core network where the relay terminal is located, and a core network where the self-organizing network terminal is located, wherein: The core network where the self-organizing network terminal is located includes N31WF, CP and UP, CP includes AMF and SMF network elements, UP includes UPF network element, and is characterized in that it includes the following steps: Step 1: Configure high-priority users and corresponding high-priority services in N3IWF through the network management system; Step 2: The relay terminal uses the 5G mode to access the core network where the relay terminal is located through the base station and establish a session; Step 3: The self-organizing network terminal establishes an IpSec tunnel with the N3IWF in the core network; wherein the IpSec tunnel related messages are relayed and forwarded through the relay terminal; Step 4: The self-organizing network terminal uses the self-organizing network mode to access the core network where the self-organizing network terminal is located through the relay terminal relay and establish a session; Step 5: When the self-organizing network terminal performs voice services, the SIP message is encapsulated in the IPSec tunnel and forwarded to the N3IWF through the resources allocated by the relay terminal; Step 6: N3IWF searches for the context through the IpSec tunnel information. After matching the user as a high-priority user, it strips off the IpSec tunnel information and identifies the service as SIP signaling, that is, voice service. Then it uses the GTP tunnel to forward the SIP signaling to the UP of the core network. The UP removes the GTP header and sends the SIP signaling to the IMS server. Step 7: After matching the high-priority service of the high-priority user in step 6, N3IWF performs signaling interaction with the core network where the relay terminal is located, and requests to initiate a dedicated flow establishment process; Step 8: The core network where the relay terminal is located triggers the dedicated flow establishment process, and establishes a dedicated flow between the relay terminal, the base station and the core network where the relay terminal is located based on the current session of the relay terminal; Step 9: After the SIP signaling interaction between the ad hoc network terminal and the IMS server is completed, voice data exchange begins, and the voice uses the AMR encoding method.

2. According to claim 1, a method for ensuring service priority of a self-organizing network terminal relay access, characterized in that: The specific process of step 4 is as follows: Step 401, the ad hoc network terminal encapsulates the signaling interaction between the terminal and the core network in the established IpSec tunnel, and sends it to the relay terminal through the ad hoc network data plane protocol; Step 402, the relay terminal uses a radio bearer and a GTP tunnel to send the IPSec data of the ad hoc network terminal including the NAS signaling to the core network where the relay terminal is located; Step 403: After receiving the relevant data, the core network where the relay terminal is located forwards it to the N3IWF of the core network where the ad hoc network terminal is located. The N3IWF removes the IpSec header and uses the NAS signaling of the ad hoc network terminal to interact with the CP and UP of the core network. Step 404: The NAS signaling generated by the core network where the self-organizing terminal is located is encapsulated in the IPSec tunnel in the N3IWF, and is sent to the base station via the GTP tunnel of the core network where the relay terminal is located. The base station uses the corresponding radio bearer to forward the data to the relay terminal. Step 405, the relay terminal forwards the IPSec data to the self-organizing terminal through the self-organizing data plane protocol, thereby completing the self-organizing terminal relay network access; the data path between the self-organizing terminal and the core network is opened.

3. According to claim 1, a method for ensuring service priority of a self-organizing network terminal relay access, characterized in that: The specific process of step 9 is as follows: For uplink data, the ad hoc network terminal encapsulates the AMR packet in the IPSec tunnel, with the IP header using a different DSCP value from the data, and sends it to the relay terminal through the ad hoc network data plane protocol; When the relay terminal forwards the AMR packet, it matches the dedicated flow and uses the allocated data bearer resources to send the IpSec data to the base station and the core network where the relay terminal is located. The core network where the relay terminal is located then forwards the IpSec data to the N3IWF. The N3IWF strips off the IpSec header and uses the session tunnel information of the ad hoc network terminal to forward the AMR packet to the UP of the core network where the ad hoc network terminal is located. The UP removes the GTP header and sends the AMR packet to the IMS server. For downlink data, the IMS server forwards the AMR data packets of other terminals to the UP of the core network where the self-organizing terminal is located through the N6 port; the UP of the core network where the self-organizing terminal is located uses the session tunnel information of the self-organizing terminal to forward the AMR packet to the N3IWF; the N3IWF adds an IpSec header and adds a DSCP value to the IpSec header, and forwards the data to the core network where the relay terminal is located; the core network where the relay terminal is located matches the IP address information and DSCP value in the IpSec header to the proprietary flow, and uses the data bearer resources allocated for the proprietary flow to send the IpSec data to the relay terminal through the base station; the relay terminal uses the self-organizing network data plane protocol to forward the IpSec data to the self-organizing terminal; after receiving the data, the self-organizing terminal removes the IpSec header and performs relevant processing on the original AMR data.

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