阅读说明：本技术 一种高铁场景下的5g语音业务处理系统及处理方法 (5G voice service processing system and processing method in high-speed rail scene ) 是由 张轩 李军 张伟辉 王忠峰 申佳胤 李洪波 项智强 胡建仁 李少书 李旭楠 于 2021-07-02 设计创作，主要内容包括：本发明涉及一种高铁场景下的5G语音业务处理系统及处理方法,属于移动通信领域,所述系统包括轨旁宏基站和车载子系统,所述车载子系统包括车内小基站和车载交换设备,所述车内小基站包括部署在车厢内的5G小基站和4G小基站；所述车载交换设备包括客户前置设备CPE和车顶天线,消息通过所述车顶天线和轨旁宏基站连接至运营商的核心网和I MS,实现高铁场景下的5G语音通信。本发明在高铁车厢内部署小基站和CPE,提升高速移动情况下车厢内移动通信信号质量,在未开通VoNR的情况下,高速行驶的高铁车厢内5G用户能够通过EPS FB回落4G网络的语音方案,实现高质量的语音业务。(The invention relates to a 5G voice service processing system and a processing method in a high-speed rail scene, belonging to the field of mobile communication, wherein the system comprises a trackside macro base station and a vehicle-mounted subsystem, the vehicle-mounted subsystem comprises an in-vehicle small base station and a vehicle-mounted switching device, and the in-vehicle small base station comprises a 5G small base station and a 4G small base station which are deployed in a carriage; the vehicle-mounted exchange equipment comprises Customer Premises Equipment (CPE) and a roof antenna, and the message is connected to a core network and an inter-frame mode (IMS) of an operator through the roof antenna and the trackside macro base station, so that 5G voice communication under a high-speed rail scene is realized. According to the invention, the small base station and the CPE are deployed in the high-speed rail carriage, the quality of mobile communication signals in the carriage under the condition of high-speed movement is improved, and under the condition that the VoNR is not switched on, 5G users in the high-speed rail carriage running at high speed can fall back to a voice scheme of a 4G network through the EPS FB, so that high-quality voice service is realized.)

1. A5G voice service processing system under a high-speed rail scene is characterized by comprising a trackside macro base station and a vehicle-mounted subsystem, wherein the vehicle-mounted subsystem comprises an in-vehicle small base station and a vehicle-mounted switching device, and an in-vehicle 5G user establishes connection with a core network of an operator and an IP Multimedia System (IMS) through the vehicle-mounted subsystem to realize 5G voice communication under the high-speed rail scene.

2. The system of claim 1, wherein the in-vehicle small cell base station comprises a 5G small cell base station and a 4G small cell base station deployed in a compartment; the vehicle-mounted exchange equipment comprises Customer Premises Equipment (CPE) and a roof antenna, and messages are connected to a core network and an IMS (IP multimedia subsystem) of an operator through the roof antenna and the trackside macro base station.

3. The system according to claim 2, wherein when an in-vehicle 5G user initiates a voice service request to the 5G small cell site, an EPS FB fallback procedure is triggered, the in-vehicle 5G user initiates a voice service request to the 4G small cell site, and a 4G core network forwards the voice service request to the IMS for voice service processing.

4. The system of claim 3, wherein the in-vehicle 5G user initiates a voice service request to the 5G small cell to trigger a fallback EPS FB procedure, comprising:

the 5G user in the vehicle initiates a voice service request to the 5G small base station;

the 5G small base station forwards the voice service request to the CPE;

the CPE sends the voice service request to the trackside macro base station through the roof antenna;

the trackside macro base station sends a request to a 5G core network of a ground operator to request voice service processing;

and the 5G core network returns a bearing modification request to the 5G small base station, thereby triggering an EPS FB process.

5. The system according to claim 3, wherein the in-vehicle 5G user initiates a voice service request to the 4G small cell site, and the 4G core network forwards the voice service request to the IMS for voice service processing, including:

the 5G user in the vehicle initiates a voice service request to the 4G small base station;

the 4G small base station forwards the voice service request to the CPE;

the CPE sends the voice service request to the trackside macro base station through the roof antenna;

the trackside macro base station sends a request to a 4G core network of a ground operator to request voice service processing;

and the 4G core network forwards the voice service request to the IMS for voice service processing.

6. A5G voice service processing method in a high-speed rail scene is characterized by comprising the following steps:

the vehicle-mounted subsystem receives a voice service request of a 5G user in the vehicle;

processing the voice service of the 5G user based on the voice service request;

the vehicle-mounted subsystem comprises an in-vehicle small base station and vehicle-mounted switching equipment, wherein the in-vehicle small base station comprises a 5G small base station and a 4G small base station which are deployed in a carriage; the vehicle-mounted exchange equipment comprises Customer Premises Equipment (CPE) and a roof antenna, and the message is connected to a core network and an IMS (IP multimedia subsystem) of an operator through the roof antenna and the trackside macro base station, so that 5G voice communication in a high-speed rail scene is realized.

7. The method according to claim 6, wherein when an in-vehicle 5G user initiates a voice service request to the 5G small cell, an EPS FB procedure is triggered, the in-vehicle 5G user initiates a voice service request to the 4G small cell, and a 4G core network forwards the voice service request to the IMS for voice service processing.

8. The method of claim 7, wherein the in-vehicle 5G user initiates a voice service request to the 5G small cell, and triggers a fallback EPS FB procedure, comprising:

the 5G user in the vehicle initiates a voice service request to the 5G small base station;

the 5G small base station forwards the voice service request to the CPE;

the CPE sends the voice service request to the trackside macro base station through the roof antenna;

the trackside macro base station sends a request to a 5G core network of a ground operator to request voice service processing;

and the 5G core network returns a bearing modification request to the 5G small base station, thereby triggering an EPS FB process.

9. The method according to claim 7, wherein the in-vehicle 5G user initiates a voice service request to the 4G small cell site, and a 4G core network forwards the voice service request to the IMS for voice service processing, including:

the 5G user in the vehicle initiates a voice service request to the 4G small base station;

the 4G small base station forwards the voice service request to the CPE;

and the CPE sends the voice service request to the trackside macro base station through the roof antenna.

10. The method of claim 9,

the trackside macro base station sends a request to a 4G core network of a ground operator to request voice service processing; and the 4G core network forwards the voice service request to the IMS for voice service processing.

Technical Field

The invention belongs to the field of mobile communication, and particularly relates to a 5G voice service processing system and a processing method in a high-speed rail scene.

Background

Although the ever-increasing demand for data services is a major push for the evolution of mobile communication networks towards 5G, voice services remain an integral part of the basic service. In the 5G era, it is also necessary to ensure the implementation of Voice services, but at the present stage, no Voice over New Radio (VoNR) is opened by three operators in China, but the existing good 4G network coverage is fully utilized, and an EPS FB (EPS Fallback, evolved packet circuit domain Fallback) mode is adopted for implementation.

The current 5G voice implementation is implemented by EPS FB: when a 5G user dials a Voice call, the Voice falls back to the 4G network and is realized through VoLTE (Voice over LTE, LTE carries Voice), and the method flow comprises the following steps:

0, UE (User Equipment) resides in an NR/5GC (new air interface/5G core network) network to complete 5GC (5G core network) registration and IMS (IP multimedia subsystem) registration processes; in the 5GC registration process, the registration request reply message sent by the AMF (Access and Management Function) to the UE carries an indication of "IMS Voice over PS Session supported".

The UE initiates a voice call request, sends SIP INVITE message (INVITE message in SIP protocol) to IMS, and the carried SIP parameter is consistent with the normal IMS (IP Multimedia Subsystem) voice parameter.

After receiving the 183 message sent from the called end, the P-CSCF (Proxy-Call Session Control Function) triggers a QoS (Quality of Service) authentication action, and sends an AAR message to the PCF (Policy Control Function) to request establishment of a private data stream (5QI ═ 1).

And 3, the PCF initiates a Protocol Data Unit (PDU) session modification process triggered by the network side, and establishes a 5 QI-1 QoS data stream.

4. Because the NR (New Radio, New air interface) base station is already configured with the EPS fallback mechanism supporting IMS voice, when receiving the session modification request message, it determines to trigger the procedure of fallback to the EPS. UE capabilities, network configuration (e.g., whether N26 capable configuration is supported), radio conditions, etc. need to be considered when triggering the fallback procedure. The NR base station may trigger a measurement report request from the UE, where the measurement report request includes an E-UTRAN (Evolved Universal Terrestrial Radio Access Network) as a fallback target.

The NR base station sends a message to the AMF rejecting PDU session modification, which is a reject reply corresponding to the request message in step 2 for establishing IMS voice QoS data flow, with information indicating fallback for ongoing IMS voice.

And 6, the NR base station triggers the preparation of the handover, and the target id in the handover request message sent to the AMF contains the identification information of the NodeB.

7. Execute 5GS- > EPS HO flow, and execute TAU flow, during which IMS data packet is transmitted normally.

8. After completing the mobility procedure towards the EPS system, the SMF/PGW (session management function/packet gateway) initiates a PDN connection modification procedure/dedicated bearer establishment procedure, i.e. triggers the establishment of an IMS voice dedicated bearer (QCI ═ 1) on the eNodeB.

9. And finishing the subsequent IMS call flow.

In the current 5G voice implementation manner (EPS FB), only for the case that the user moves at a low speed or does not move, how to ensure the call quality and continuity of the voice of the user when the user is on a high-speed rail and the high-speed rail moves at a high speed (moving speed > -300 km/h) is not considered. Due to the characteristics of poor leakproofness and 5G spectrum penetrating power of a carriage of a high-speed rail, after a user enters the carriage, a 5G base station signal beside a track becomes weak after entering the carriage, and when the high-speed rail moves at a high speed, the 5G signal in the carriage becomes weaker, so that the voice telephone quality of the 5G user is poor, even the voice telephone quality is interrupted, and the continuity experience is poor.

Disclosure of Invention

The invention mainly aims to overcome the defects of the prior art and provide a 5G voice service processing system and a processing method under a high-speed rail scene, wherein the system comprises a trackside macro base station and a vehicle-mounted subsystem, the vehicle-mounted subsystem comprises an in-vehicle small base station and a vehicle-mounted exchange device, and the in-vehicle small base station comprises a 5G small base station and a 4G small base station which are deployed in a carriage; the vehicle-mounted exchange equipment comprises Customer Premises Equipment (CPE) and a roof antenna, and the message is connected to a core network and an IMS (IP multimedia subsystem) of an operator through the roof antenna and the trackside macro base station, so that 5G voice communication in a high-speed rail scene is realized. According to the invention, the small base station and the CPE are deployed in the high-speed rail carriage, the quality of mobile communication signals in the carriage under the condition of high-speed movement is improved, and under the condition that the VoNR is not switched on, 5G users in the high-speed rail carriage running at high speed can fall back to a voice scheme of a 4G network through the EPS FB, so that high-quality voice service is realized.

According to one aspect of the invention, the invention provides a 5G voice service processing system under a high-speed rail scene, which comprises a trackside macro base station and a vehicle-mounted subsystem, wherein the vehicle-mounted subsystem comprises an in-vehicle small base station and a vehicle-mounted switching device, and an in-vehicle 5G user establishes connection with a core network of an operator and an IP Multimedia System (IMS) through the vehicle-mounted subsystem, so that 5G voice communication under the high-speed rail scene is realized.

Preferably, the in-vehicle small base station comprises a 5G small base station and a 4G small base station which are deployed in a carriage; the vehicle-mounted exchange equipment comprises Customer Premises Equipment (CPE) and a roof antenna, and messages are connected to a core network and an IMS (IP multimedia subsystem) of an operator through the roof antenna and the trackside macro base station.

Preferably, when an in-vehicle 5G user initiates a voice service request to the 5G small cell, an EPS FB fallback process is triggered, the in-vehicle 5G user initiates a voice service request to the 4G small cell, and a 4G core network forwards the voice service request to the IMS for voice service processing.

Preferably, the in-vehicle 5G user initiates a voice service request to the 5G small cell, and triggers a fallback EPS FB process, including:

the 5G user in the vehicle initiates a voice service request to the 5G small base station;

the 5G small base station forwards the voice service request to the CPE;

the CPE sends the voice service request to the trackside macro base station through the roof antenna;

the trackside macro base station sends a request to a 5G core network of a ground operator to request voice service processing;

and the 5G core network returns a bearing modification request to the 5G small base station, thereby triggering an EPS FB process.

Preferably, the in-vehicle 5G user initiates a voice service request to the 4G small cell, and the 4G core network forwards the voice service request to the IMS for voice service processing, including:

the 5G user in the vehicle initiates a voice service request to the 4G small base station;

the 4G small base station forwards the voice service request to the CPE;

the CPE sends the voice service request to the trackside macro base station through the roof antenna;

the trackside macro base station sends a request to a 4G core network of a ground operator to request voice service processing;

and the 4G core network forwards the voice service request to the IMS for voice service processing.

According to another aspect of the present invention, the present invention further provides a method for processing a 5G voice service in a high-speed rail scene, where the method includes:

the vehicle-mounted subsystem receives a voice service request of a 5G user in the vehicle;

processing the voice service of the 5G user based on the voice service request;

the vehicle-mounted subsystem comprises an in-vehicle small base station and vehicle-mounted switching equipment, wherein the in-vehicle small base station comprises a 5G small base station and a 4G small base station which are deployed in a carriage; the vehicle-mounted exchange equipment comprises Customer Premises Equipment (CPE) and a roof antenna, and the message is connected to a core network and an IMS (IP multimedia subsystem) of an operator through the roof antenna and the trackside macro base station, so that 5G voice communication in a high-speed rail scene is realized.

Preferably, when an in-vehicle 5G user initiates a voice service request to the 5G small cell, an EPS FB fallback process is triggered, the in-vehicle 5G user initiates a voice service request to the 4G small cell, and a 4G core network forwards the voice service request to the IMS for voice service processing.

Preferably, the in-vehicle 5G user initiates a voice service request to the 5G small cell, and triggers a fallback EPS FB process, including:

the 5G user in the vehicle initiates a voice service request to the 5G small base station;

the 5G small base station forwards the voice service request to the CPE;

the CPE sends the voice service request to the trackside macro base station through the roof antenna;

the trackside macro base station sends a request to a 5G core network of a ground operator to request voice service processing;

and the 5G core network returns a bearing modification request to the 5G small base station, thereby triggering an EPS FB process.

Preferably, the in-vehicle 5G user initiates a voice service request to the 4G small cell, and the 4G core network forwards the voice service request to the IMS for voice service processing, including:

the 5G user in the vehicle initiates a voice service request to the 4G small base station;

the 4G small base station forwards the voice service request to the CPE;

and the CPE sends the voice service request to the trackside macro base station through the roof antenna.

Preferably, the trackside macro base station sends a request to a 4G core network of a ground operator to request voice service processing;

and the 4G core network forwards the voice service request to the IMS for voice service processing.

The invention has the following beneficial effects:

1) small base stations and CPE are deployed in a high-speed railway carriage, so that the quality of mobile communication signals in the carriage under the condition of high-speed movement is improved.

2) The 4G small base stations and the 5G small base stations are simultaneously deployed in the high-speed rail carriages, so that the 5G users in the high-speed rail carriages can fall back to the voice scheme of the 4G network through the EPS FB under the condition that the VoNR is not switched on, and high-quality voice services are realized.

The features and advantages of the present invention will become apparent by reference to the following drawings and detailed description of specific embodiments of the invention.

Drawings

Fig. 1 is a schematic diagram of a 5G voice service processing system in a high-speed rail scenario according to the present invention;

fig. 2 is a schematic diagram illustrating a 5G voice service fallback flow in a high-speed rail scenario according to the present invention;

fig. 3 is a schematic flow chart of a 5G voice service processing method in a high-speed rail scenario according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Fig. 1 is a schematic diagram of a 5G voice service processing system in a high-speed rail scenario according to the present invention. As shown in fig. 1, the present invention provides a 5G voice service processing system in a high-speed rail scene, where the system includes a trackside macro base station and a vehicle-mounted subsystem, where the vehicle-mounted subsystem includes an in-vehicle small base station and a vehicle-mounted switching device, and an in-vehicle 5G user establishes a connection with a core network of an operator and an IP multimedia system IMS through the vehicle-mounted subsystem, so as to implement 5G voice communication in the high-speed rail scene.

Specifically, the in-vehicle small base station comprises a 5G small base station and a 4G small base station which are deployed in a carriage; the vehicle-mounted exchange equipment comprises Customer Premises Equipment (CPE) and a roof antenna, and messages are connected to a core network and an IMS (IP multimedia subsystem) of an operator through the roof antenna and the trackside macro base station.

When a 5G user in the vehicle initiates a voice service request to the 5G small base station, triggering a fallback EPS FB process, initiating the voice service request to the 4G small base station by the 5G user in the vehicle, and forwarding the voice service request to the IMS by a 4G core network for voice service processing.

Specifically, as shown in fig. 2, the in-vehicle 5G user initiates a voice service request to the 5G small cell, and triggers a fallback EPS FB process, including:

1. the 5G user in the vehicle initiates a voice service request to the 5G small base station;

2. the 5G small base station forwards the voice service request to the CPE;

3. the CPE sends the voice service request to the trackside macro base station through the roof antenna;

4. the trackside macro base station sends a request to a 5G core network of a ground operator to request voice service processing;

5. and the 5G core network returns a bearing modification request to the 5G small base station, thereby triggering an EPS FB process.

The 5G user in the vehicle initiates a voice service request to the 4G small base station, and the 4G core network forwards the voice service request to the IMS for voice service processing, including:

6. the 5G user in the vehicle initiates a voice service request to the 4G small base station;

7. the 4G small base station forwards the voice service request to the CPE;

8. the CPE sends the voice service request to the trackside macro base station through the roof antenna;

9. the trackside macro base station sends a request to a 4G core network of a ground operator to request voice service processing;

10. the 4G core network forwards the voice service request to the IMS for voice service processing;

11. and finishing the subsequent IMS call flow.

Through the scheme of this embodiment, avoided the drawback of the signal attenuation that the outer signal of car pierces through the automobile body and brings well, can ensure the speech quality of 5G user in the train carriage of high-speed removal, make its continuity obtain the guarantee, promote user experience.

Example 2

Fig. 3 is a schematic flow chart of a 5G voice service processing method in a high-speed rail scenario according to the present invention. As shown in fig. 3, the present invention further provides a method for processing a 5G voice service in a high-speed rail scene, where the method includes:

the vehicle-mounted subsystem receives a voice service request of a 5G user in the vehicle;

processing the voice service of the 5G user based on the voice service request;

the vehicle-mounted subsystem comprises an in-vehicle small base station and vehicle-mounted switching equipment, wherein the in-vehicle small base station comprises a 5G small base station and a 4G small base station which are deployed in a carriage; the vehicle-mounted exchange equipment comprises Customer Premises Equipment (CPE) and a roof antenna, and the message is connected to a core network and an IMS (IP multimedia subsystem) of an operator through the roof antenna and the trackside macro base station, so that 5G voice communication in a high-speed rail scene is realized.

Preferably, when an in-vehicle 5G user initiates a voice service request to the 5G small cell, an EPS FB fallback process is triggered, the in-vehicle 5G user initiates a voice service request to the 4G small cell, and a 4G core network forwards the voice service request to the IMS for voice service processing.

Preferably, the in-vehicle 5G user initiates a voice service request to the 5G small cell, and triggers a fallback EPS FB process, including:

the 5G user in the vehicle initiates a voice service request to the 5G small base station;

the 5G small base station forwards the voice service request to the CPE;

the CPE sends the voice service request to the trackside macro base station through the roof antenna;

the trackside macro base station sends a request to a 5G core network of a ground operator to request voice service processing;

and the 5G core network returns a bearing modification request to the 5G small base station, thereby triggering an EPS FB process.

Preferably, the in-vehicle 5G user initiates a voice service request to the 4G small cell, and the 4G core network forwards the voice service request to the IMS for voice service processing, including:

the 5G user in the vehicle initiates a voice service request to the 4G small base station;

the 4G small base station forwards the voice service request to the CPE;

the CPE sends the voice service request to the trackside macro base station through the roof antenna;

preferably, the trackside macro base station sends a request to a 4G core network of a ground operator to request voice service processing;

and the 4G core network forwards the voice service request to the IMS for voice service processing.

The specific implementation process of each method step in embodiment 2 of the present invention is the same as the implementation process of the function implemented by each network element in embodiment 1, and is not described herein again.

Example 3

According to another aspect of the invention, the invention also provides a computer-readable storage medium storing computer-executable instructions that, when executed by a processor, implement the method steps of embodiment 2.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.