LTE voice test module and device

Abstract

The utility model provides an LTE voice test module and LTE voice test equipment. The module comprises a core control unit, the core control unit is electrically connected with an external interface and an LTE network access unit, the LTE network access unit is electrically connected with an SIM card, and various indexes of voice service quality can be tested.

Description

TECHNICAL FIELD

[0001] The utility model relates to railway wireless communication technical field especially relates to a kind of LTE voice test module and equipment. BACKGROUND

[0002] International Railway Union has clearly proposed that the evolution route of railway mobile communication system will cross 3G technology, and directly develop from GSM-R (Global System for Mobile Communications-Railway, railway digital mobile communication system) technology to 4G LTE (Long Term Evolution). As broadband mobile communication system, LTE has higher data transmission rate, higher spectrum efficiency, lower service delay, higher security and other characteristics, supports high-speed mobile, flat network structure, low deployment cost, can flexibly configure resources and other advantages, can bear rich data service, is the important direction of current mobile communication development.

[0003] To adapt to the special application requirement of railway, railway dispatching communication, train control data and other new applications are added on the basis of ordinary LTE network, and form LTE-R network system serving railway. But current there is no complete detection evaluation technical means for these new applications, especially the availability and reliability of LTE VOIP voice dispatching service quality lack corresponding test equipment. UTILITY MODEL CONTENT

[0004] To solve the technical problem that the availability and reliability of LTE voice service quality lack corresponding test equipment, the utility model provides a kind of LTE voice test module and equipment, for testing the various indexes of LTE voice service quality, reaches the purpose of detecting and evaluating the quality of LTE voice service.

[0005] Disclose the first aspect of the embodiment, provide a kind of LTE voice test module, including core control unit, the core control unit is electrically connected with external interface and LTE network access unit, the LTE network access unit is electrically connected with SIM card.

[0006] In some implementation ways, the core control unit is further electrically connected with hardware watchdog.

[0007] In some implementation ways, the core control unit is further electrically connected with audio conversion unit, and the audio conversion unit is used to convert unbalanced LTE audio into balanced LTE audio.

[0008] In some implementation ways, the core control unit is further electrically connected with CAN interface.

[0009] In some implementations, the core control unit is further electrically connected with an interface expansion unit, and the interface expansion unit comprises a plurality of external communication interfaces.

[0010] In some implementations, the core control unit is further electrically connected with an SD card.

[0011] In some implementations, the external interface comprises an Ethernet interface and a serial port.

[0012] In some implementations, the LTE network access unit is further electrically connected with an antenna.

[0013] In some implementations, the Ethernet interface is configured to receive an LTE network test data packet, and the serial port is configured to receive a test command of the LTE network.

[0014] In the second aspect of the embodiment, a railway LTE voice test device is provided, which comprises a motherboard and an LTE voice test module as described above, and the LTE voice test module is arranged on the motherboard and electrically connected with the motherboard.

[0015] The LTE voice test module provided by the present application comprises a core control unit, which is electrically connected with an external interface and an LTE network access unit, and the LTE network access unit is electrically connected with an SIM card, so as to realize the test of each index of the voice service quality. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 is a composition principle diagram of a railway LTE voice test device provided by the present disclosure. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0019] Embodiment

[0020] The current LTE voice scheduling system adopts POC (PTT Over Cellular) voice scheduling technology, supports individual call, group call, emergency call, multi-priority preemption and other railway special services between mobile to mobile and mobile to fixed device. The voice service establishment time and success rate will directly affect the user experience, and is the core index for measuring the reliability and availability of the voice scheduling system. Therefore, the LTE voice test module needs to complete the detection of voice service quality indexes including registration service indexes, individual call service indexes, group call service indexes and PTT (Push to Talk, i.e. push to talk) indexes. The registration service indexes include registration success rate and registration time; the individual call service indexes include: fixed-mobile call success rate, fixed-mobile call establishment time, fixed-mobile call drop rate, mobile-fixed call success rate, mobile-fixed call establishment time, mobile-fixed call drop rate, mobile-mobile call success rate, mobile-mobile call establishment time, mobile-mobile call drop rate; the group call service indexes include: in-station group call success rate, in-station group call establishment time, in-station group call drop rate, adjacent station group call success rate, adjacent station group call establishment time, adjacent station group call drop rate, emergency call success rate, emergency call establishment time, emergency call drop rate, reconnection group call success rate, reconnection group call establishment time, reconnection group call drop rate; the PTT indexes include PTT talk preemption success rate and PTT talk preemption delay.

[0021] To solve the problem of lack of effective test equipment for railway LTE voice service quality, the embodiment provides an LTE voice test module for testing various indexes of LTE voice service quality, so as to achieve the purpose of detecting and evaluating the railway LTE voice service quality, which is of great significance for LTE network maintenance and ensuring smooth train operation.

[0022] The embodiment provides an LTE voice test device, such as Figure 1As shown, it comprises a motherboard (also known as a mainboard) and an LTE voice test module, which is arranged on the motherboard and electrically connected with the motherboard. The LTE voice test module comprises a core control unit, which is electrically connected with an external interface, a CAN interface, an LTE network access unit, a hardware watchdog, an audio conversion unit, an SD card and an interface expansion unit. The LTE network access unit is electrically connected with a SIM card and an antenna. The external interface comprises an Ethernet interface and a serial port. The interface expansion unit comprises multiple external communication interfaces, specifically, each external communication interface is connected with a serial port.

[0023] The LTE voice test module in the embodiment provides interfaces such as CAN, Ethernet and serial port for data or command transmission. In specific use, test control software sends test commands to the LTE voice test module through a serial port and sends network test data packets to the LTE voice test module through an Ethernet interface. Different LTE voice test modules interact with each other through a CAN bus.

[0024] The audio conversion unit is used to convert unbalanced LTE audio into balanced LTE audio. The hardware watchdog serves as a protection circuit of the LTE voice test module and can realize self-recovery of the LTE voice test module when the LTE voice test module has abnormal conditions. The LTE network access unit is electrically connected with a SIM card, realizes LTE network access and carries out end-to-end transmission of LTE network data. The core control unit is used to control the LTE access unit to log in to an LTE network according to a received test command, interacts with a POC server through an air interface after logging in to the network, realizes SIP protocol and call control, completes service registration, individual call, group call and other call services.

[0025] LTE voice service quality index testing is mainly completed by test control software controlling the LTE voice service quality. After multiple cyclic repeated tests, test values are statistically calculated to obtain the results. The LTE voice test module is applied to the LTE voice service quality testing process, which comprises the following steps:

[0026] (1) The test control software configures an individual service quality index test item;

[0027] (2) The test control software sends an AT instruction command to control the LTE voice test module to log in to an LTE network;

[0028] (3) The test control software sends a call command to control the LTE voice test module to initiate an individual call;

[0029] (4) The call result is monitored. If it is successful, the call setup time is calculated, and the number of successful times is accumulated;

[0030] (5) Wait for the call maintenance time, then hang up;

[0031] (6) Wait for the call interval time, then re-initiate the call;

[0032] (7) Accumulate the test times, and finally end the test.

[0033] The LTE voice test module mainly tracks the characteristic SIP signaling generated at the beginning and end of each voice service in real time, realizes the tracking of the whole life cycle of the voice service, and thus achieves the calculation and statistics of each index. Specifically, the test process of each index using the LTE voice test module is as follows:

[0034] (1) Registration delay and registration success rate test.

[0035] When the terminal Client registers, it needs to register with the POC server Server, that is, the terminal Client sends the REGISTER signaling to the POC server Server, and when the registration is successful, the 200 OK signaling sent by the POC server Server is received. Therefore, the registration service delay and success rate can be calculated by marking the sending and receiving time and number of the two signals.

[0036] Registration delay = Time 200 Ok - Time REGISTER (1)

[0037]

[0038] When the following two scenarios occur, it is defined as registration failure:

[0039] ① The terminal Client sends the REGISTER command to the POC server Server, and does not receive the 200 OK command within 500 ms;

[0040] ② The terminal Client sends the REGISTER command to the POC server Server, and receives the 4XX SIP command within 500 ms.

[0041] (2) Individual call / group call establishment time and establishment success rate test.

[0042] When the mobile user initiates a call, the caller sends the INVITE signaling to the POC server Server, the POC server Server returns the 180 OK signaling to indicate that the called party has started ringing, and further returns the 200 OK signaling to indicate that the called party has answered.

[0043] The call flow initiated by the fixed station FAS is similar to the call flow initiated by the mobile user. When the fixed station FAS initiates a call, the INVITE signaling is sent to the POC server Server. When the fixed station FAS receives the 180 OK, it indicates that the called party has started ringing. When the 200 OK signaling is received, it indicates that the called party has answered.

[0044] Call setup delay = Time 200 Ok -Time INVITE (3)

[0045]

[0046] When the following two scenarios occur, it is defined as a call failure:

[0047] ① The terminal Client sends the INVITE signaling to the POC server Server within 1s (terminal UE calls the fixed station FAS) or 3s (fixed station FAS calls the terminal UE), and does not receive the 200 OK signaling;

[0048] ② The terminal Client sends the INVITE signaling to the POC server Server within 1s (terminal UE calls the fixed station FAS) or 3s (fixed station FAS calls the terminal UE), and receives the 4XX SIP signaling.

[0049] (3) PTT talk right preemption time and success rate test.

[0050] The POC voice dispatch group call is a half-duplex service. Before the speaker speaks, the PTT key needs to be pressed to preoccupy the talk right. After the speech is completed, the PTT is released to release the talk right. When the terminal initiates the PTT preemption, the FLOOR REQUEST signaling is sent to the Server. After the Server makes a talk right decision, the FLOOR GRANDED signaling is returned to indicate that the talk right preoccupation is successful. When the PTT is released, the FLOOR RELEASE signaling is sent to the Server. The Server returns the FLOOR IDLE signaling to indicate that the talk right release is successful.

[0051] PTT talk right preemption delay = Time FLOOR GRANDED -Time FLOOR REQUEST (5)

[0052]

[0053] When the following two scenarios occur, it is defined as a PTT preoccupation failure:

[0054] ① The terminal does not receive the FLOOR GRANDED signaling within 100ms after sending the FLOOR REQUEST signaling;

[0055] 2. The terminal receives the Floor REJECTED signaling within 100 ms of sending the FLOOR REQUEST signaling.

[0056] (4) Call drop rate

[0057] The terminal initiates a voice call, and the calling party does not actively hang up the call during the test. The ratio of the number of non-active call releases to the test duration is taken as the statistical result of the call drop rate. Call drop mainly includes two categories: the first category is wireless drop caused by wireless disconnection, and the second category is that no wireless drop occurs, but the service layer receives the BYE signaling sent by the server.

[0058]

[0059] Through the LTE voice test module provided in the embodiment, a voice service quality evaluation system taking the registration time and success, the individual call / group call establishment time and success rate, the PTT talk burst time and success rate, the call drop rate and the like as the content is first established, and the test method and tool of each index are realized, which provides a reliable means and basis for the detection and maintenance of the LTE network voice service.

[0060] It should be noted that in this document, the terms "first", "second", etc. in the specification and claims of the application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. The terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0061] The above description is only some of the preferred embodiments of the present disclosure and an explanation of the principles of the technology applied. Those skilled in the art should understand that the scope of the utility model involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or equivalent features without departing from the above utility model concept. For example, the above features are replaced with the technical features disclosed in the embodiments of the present disclosure (but not limited to) having similar functions to form technical solutions.

Claims

1. An LTE voice test module, characterized by, The LTE voice test module comprises a core control unit, an external interface and an LTE network access unit are electrically connected with the core control unit, the LTE network access unit is electrically connected with a SIM card; the core control unit is further electrically connected with a hardware watchdog.

2. The LTE voice test module of claim 1, wherein, The core control unit is further electrically connected with an audio conversion unit, the audio conversion unit is used for converting unbalanced LTE audio into balanced LTE audio.

3. The LTE voice test module of claim 1, wherein, The core control unit is further electrically connected with a CAN interface.

4. The LTE voice test module of claim 1, wherein, The core control unit is further electrically connected with an interface expansion unit, the interface expansion unit comprises a plurality of external communication interfaces.

5. The LTE Voice test module of claim 1, wherein, The core control unit is further electrically connected with an SD card.

6. The LTE Voice test module of claim 1, wherein, The external interface comprises an Ethernet interface and a serial port.

7. The LTE Voice test module of claim 1, wherein, The LTE network access unit is further electrically connected with an antenna.

8. The LTE voice test module of claim 6, wherein, The Ethernet interface is used for receiving an LTE network test data packet; the serial port is used for receiving a test command of the LTE network.

9. A railway LTE voice test device, characterized by, The LTE voice test module comprises a core control unit, an external interface and an LTE network access unit are electrically connected with the core control unit, the LTE network access unit is electrically connected with a SIM card; the core control unit is further electrically connected with a hardware watchdog.

Images