WO2017000762A1

WO2017000762A1 - Method and apparatus for transmitting voice in party-line telephone system

Info

Publication number: WO2017000762A1
Application number: PCT/CN2016/085606
Authority: WO
Inventors: 韩淑玲; 颜晓庆; 徐劲松; 孙正旻
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-06-30
Filing date: 2016-06-13
Publication date: 2017-01-05
Also published as: CN106331397A

Abstract

Disclosed is a method for transmitting voice in a party-line telephone system and the method is applied to nodes in a chain network. The method includes: encoding a voice signal of a user in the present node, and transmitting the encoded voice signal of the user in the present node on a line; determining, according to the location of the present node in the chain network, whether to forward the encoded voice signal received on the line; mixing encoded voice signals which are received on the line and are the encoded voice signals of users in other nodes, decoding the mixed signal and then transmitting the decoded signal to the user in the present node.

Description

Method and device for transmitting voice in collinear telephone system

Technical field

This document relates to, but is not limited to, the field of communication technologies, and in particular, to a method and apparatus for transmitting voice in a collinear telephone system.

Background technique

The collinear telephone is a kind of telephone service commonly used in the railway private network, and is mainly used for various traffic scheduling, etc. The basic feature is that the voice signals of the dispatching station and the plurality of dispatching stations are mixed into one conference call, and each other It can be heard between, that is, to achieve superposition of multiple audio. Therefore, when the conventional railway equipment is implemented, this function is realized in a 64K time slot bandwidth. In a collinear telephone system, all the extensions belonging to the collinear group are scattered on multiple site devices. In order to ensure the safety of the railway operation, the completion of the audio superposition function cannot generally be concentrated at one point, otherwise the failure occurs at this point. The dispatching system will be paralyzed, so the collinear mixing function of the railway dedicated line equipment generally adopts chain networking and hierarchical superposition. When hierarchically superimposing, if N users participate, then each user hears the voice after N-2 times of superimposition. Since multi-level superposition will introduce more echoes and delays, the superimposed voice effect is not ideal, there is Howling, self-excitation, noise interference, etc.

After actual verification, the conference function consisting of 32 users, if the centralized mixing mode is adopted, the echo attenuation exceeds -33dB, and the speech effect is very good; for the conference function composed of 64 users, if the centralized mixing mode is adopted, the echo is used. The attenuation can reach -30dB, and the user experience is also very good. However, 32 users are basically impossible to achieve with 30-level mixing, because it has been verified that after the general mixing equipment has been mixed by more than 10 levels, the delay and echo are obvious, and the echo attenuation is even less than -20dB. Basically unusable, the user experience is poor.

Therefore, how to improve the voice transmission quality of the collinear telephone system and ensure the reliability is a problem to be solved.

Summary of the invention

The following is an overview of the topics detailed in this document. This summary is not intended to limit the claims The scope of protection.

This document provides a method of transmitting voice in a collinear telephone system that improves the voice quality of a collinear telephone system and ensures reliability.

An embodiment of the present invention provides a method for transmitting voice in a collinear telephone system, which is applied to a node of a chain network, and the method includes:

Encoding the voice signal of the user of the node, and transmitting the voice coded signal of the user of the node to the line;

Determining whether to forward the voice coded signal received from the line according to the location of the node on the chain network;

The voice coded signals of other node users received from the line are mixed, and the mixed signals are decoded and then sent to the user of the node.

Optionally, sending the voice coded signal of the user of the node to the line, including:

When the node is the first node or the intermediate node of the chain network, the voice coded signal of the user of the node is sent to the adjacent downstream node on the downlink time slot allocated to the node;

When the node is a tail node of the chain network, the voice coded signal of the user of the node is sent to the adjacent upstream node on the uplink time slot allocated to the node;

Wherein, the downlink is a link between a node and an adjacent downstream node; the uplink is a link between the node and an adjacent upstream node;

Each node of the chain network is allocated a different time slot resource on the line to transmit a voice coded signal of the user of the node.

Optionally, determining, according to the location of the node on the chain network, whether to perform forwarding processing on the voice coded signal received from the line, including:

When the node is the first node of the chain network, the voice coded signal received from the downlink is not forwarded;

When the node is an intermediate node of the chain network, the voice coded signal received from the downlink is transparently transmitted to the uplink, and the voice coded signal received from the uplink is transparently transmitted to the downlink. Upper

When the node is the tail node of the chain network, the voice coded signal received from the uplink is looped back to the uplink.

Optionally, mixing the voice coded signals of other node users received from the line, including:

When the node is the first node or the intermediate node of the chain network, the voice coded signals of other node users received from the downlink are mixed and processed;

When the node is a tail node of the chain network, the voice coded signals of other node users received from the uplink are subjected to mixing processing.

When the node is the first node of the chain network, the voice coded signal of the user of the node is sent to the adjacent downstream node on the downlink time slot allocated to the node;

When the node is an intermediate node of the chain network, the voice coded signal of the user of the node is sent to the adjacent downstream node on the downlink time slot allocated to the node, and when the uplink is allocated to the node Sending a voice coded signal of the user of the node to an adjacent upstream node;

When the node is the tail node of the chain network, the voice coded signal received from the uplink is not forwarded.

When the node is the first node of the chain network, the voice coded signals of other node users received from the downlink are mixed and processed;

When the node is an intermediate node of the chain network, the voice coded signal of the upstream node user received from the uplink and the voice coded signal of the downstream node user received from the downlink are mixed and processed;

Optionally, the line is an E1 link;

A bidirectionally transmitted E1 link is configured between any two nodes of the chain network.

An embodiment of the present invention provides a device for transmitting voice in a collinear telephone system, which is applied to a node of a chain network, and includes:

The user voice signal processing module of the node is configured to encode the voice signal of the user of the node, and send the voice coded signal of the user of the node to the line;

The line receiving signal processing module is configured to determine whether to forward the voice coded signal received from the line according to the position of the node on the chain network;

The other node user voice signal processing module is configured to perform mixing processing on the voice coded signals of other node users received from the line, decode the mixed signal, and then send the signal to the user of the node.

Optionally, the user voice signal processing module of the node is configured to send the voice coded signal of the user of the node to the line in the following manner:

When the node is the tail node of the chain network, it is sent on the uplink time slot allocated to the node. Sending a voice coded signal of the user of the node to an adjacent upstream node;

Optionally, the line receiving signal processing module is configured to determine whether to forward the voice coded signal received from the line according to the location of the node on the chain network in the following manner:

When the node is an intermediate node of the chain network, the voice coded signal received from the downlink is transparently transmitted to the uplink, and the voice coded signal received from the uplink is transparently transmitted to the downlink. on;

Optionally, the other node user voice signal processing module is configured to perform sound mixing processing on the voice coded signals of other node users received from the line in the following manner:

Optionally, the line is an E1 link;

The embodiment of the invention further provides a computer readable storage medium storing computer executable instructions, which are implemented when executed by a processor.

Compared with the related art, the method for transmitting voice in the collinear telephone system provided by the embodiment of the present invention, the node on the chain network encodes the voice signal of the user of the node and sends the voice signal to the line, according to the node. The position on the chain network determines whether to forward the voice coded signal received from the line, mixes the voice coded signals of other node users received from the line, and performs the mixed signal on the mixed signal. The decoding process is then sent to the user of the node. The voice transmission method of the invention enables more stations to join the collinear group, and has small speech delay and good echo suppression effect, eliminating the problems of traditional implementation methods such as howling self-excitation and noise interference, thereby significantly improving the collinear telephone system. Voice quality and reliability.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

FIG. 1 is a schematic structural diagram of an apparatus for transmitting voice in a collinear telephone system on a chain network according to an embodiment of the present invention (taking an intermediate node of a chain network as an example).

2 is a flow chart of a method for transmitting voice in a collinear telephone system according to an embodiment of the present invention.

FIG. 3 is a schematic structural diagram of an apparatus for transmitting voice in a collinear telephone system according to an embodiment of the present invention.

4 is a schematic structural diagram of a chain network in a collinear telephone system according to an application example of the present invention.

FIG. 5 is a schematic diagram of the operation of the head node of the chain network in the application example 1 of the present invention.

FIG. 6 is a schematic diagram of the operation of the intermediate node of the chain network in the application example 1 of the present invention (taking the site 2 as an example).

FIG. 7 is a schematic diagram of the operation of the tail node of the chain network in the application example 1 of the present invention.

FIG. 8 is a schematic diagram of the operation of the head node of the chain network in the application example 2 of the present invention.

FIG. 9 is a schematic diagram of the operation of the intermediate node of the chain network in the application example 2 of the present invention (taking the site 2 as an example).

FIG. 10 is a schematic diagram showing the operation of the tail node of the chain network in the application example 2 of the present invention.

Embodiments of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

As the bandwidth capacity of transmission equipment becomes higher and higher, the transmission capacity is no longer the bottleneck of private networks such as railways and power, and the collinear telephone function does not need to strongly transmit one in a 64k. The mixed voice of the dispatch group, the transmission system has the ability to provide more channel resource usage. In this case, it is completely possible to consider the use of chain-type networking and single-stage mixing to realize the collinear telephone function in the railway private network, which not only ensures the high voice quality of the centralized mixing mode, but also achieves the high chain-type networking mode. Reliability, combined with the ring protection function, can achieve the effect that the single-line fault scheduling function is not affected, and the scheduling service of other stations in a single station failure is not affected.

The embodiment of the invention realizes the function of chain type networking and single-stage mixing, has the voice effect of centralized mixing and the high reliability of the chain type networking, and requires high reliability and high voice quality on the railway. It is very suitable.

As shown in FIG. 1, the device for transmitting voice in the collinear telephone system includes at least the following modules:

The voice coding module is configured to encode the voice signal sent by the user end of the node, and generate a voice coded signal of the node;

The voice decoding module is configured to decode the signal after the mixing of the mixing module, and the decoded voice signal is sent to the user end of the node;

a line interface module configured to receive a voice coded signal from a line or to transmit a voice coded signal to the line;

a mixing module configured to perform a mixing process on the voice coded signals of other nodes received from the line;

As shown in FIG. 1, for a voice transmission device located at an intermediate node or a tail node of a chain network, Can include:

a signal transparent transmission module, configured to transparently forward and transmit the voice coded signal received from the line;

The method for transmitting voice in the collinear telephone system according to the embodiment of the present invention includes the following steps:

The first step: the voice signal from the user terminal of the node is digitally processed by the coding module to obtain a voice coded signal;

The second step: according to the location of the node on the link, the voice coded signal of the user terminal of the node is sent to the corresponding channel through the line interface module for transmission;

The third step: the voice coded signal received from the line through the line interface module is transparently transmitted to the line through the signal transparent transmission module (for the intermediate node or the tail node of the chain network) and the line interface module;

The fourth step: all the voice coded signals of the non-local node received from the line are sent to the mixing module for mixing, and then sent to the decoding module for decoding to obtain the voice signal, which is sent to the user terminal of the node, and the user can Hear the sound information of each other node.

Compared with the related technologies, more methods can be added to the scheduling collinear group, and the speech delay is small, the echo suppression effect is good, and the traditional self-excitation and noise interference are eliminated. The problem of implementation mode, after actual measurement proves that the collinear group conference function composed of 32 users, if the chain type network and single-stage mixing device of the invention are adopted, the voice effect is good, and the echo attenuation exceeds -33 dB; With 64 users of the collinear group, the echo attenuation can still reach -30dB, and the user experience is also very good. This voice effect is far from the ordinary multi-level overlay mixing method.

As shown in FIG. 2, an embodiment of the present invention provides a method for transmitting voice in a collinear telephone system, which is applied to a node of a chain network, and the method includes:

S10: Perform encoding processing on the voice signal of the user of the node, and send the voice coded signal of the user of the node to the line;

S20. Determine, according to the location of the node on the chain network, whether it is received from the line. The voice coded signal is forwarded;

S30, performing a mixing process on the voice coded signals of other node users received from the line, decoding the mixed signal, and then transmitting the signal to the user of the node;

The method may also include the following features:

Optionally, the transmission line is an E1 link;

Optionally, the encoding process is performed on the voice signal of the user of the node, including: performing pulse code modulation (PCM) coding on the voice signal of the user of the node;

Decoding the mixed signal, including: performing PCM decoding processing on the mixed signal;

Each node of the chain network is allocated a different time slot resource on the line to transmit a voice coded signal of the user of the node. If a node has multiple users, multiple time slots are allocated.

Wherein, for any node on the chain network, the downstream node of the node is a node on the chain network that is closer to the tail node than the node, and the upstream node of the node is more than the node on the chain network. a node near the head node;

The link between any two nodes of the chain network is a bidirectional transmission link, that is, the uplink of any node is a bidirectional transmission link, and the downlink of any node is a bidirectional transmission link;

When the node is a tail node of the chain network, the voice coded signal received from the uplink is looped back to the uplink;

When the node is a tail node of the chain network, the voice coded signals of other node users received from the uplink are mixed and processed;

When the node is a tail node of the chain network, the voice coded signal received from the uplink is not forwarded;

Optionally, a loopback protection link may also be configured between the head node and the tail node of the chain network. When any site abnormality or abnormal link between stations occurs in the chain network, the protection link is automatically detected and enabled, and the first station, intermediate station, and tail station information of each station are adjusted to realize the protection function.

As shown in FIG. 3, an embodiment of the present invention provides a device for transmitting voice in a collinear telephone system, which is applied to a node of a chain network, and includes:

The device may also include the following features:

Optionally, the user voice signal processing module of the node is configured to send the voice coded signal of the user of the node to the line, including:

Optionally, the line receiving signal processing module is configured to determine, according to the location of the node on the chain network, whether to forward the voice coded signal received from the line, including:

Optionally, the line is an E1 link, and may be a link group composed of multiple E1s;

Configuring an E1 link for bidirectional transmission between any two nodes of the chain network;

The user voice signal processing module of the node is configured to encode the voice signal of the user of the node in the following manner: performing pulse coding and modulating the PCM code on the voice signal of the user of the node;

The other node user voice signal processing module is configured to perform decoding processing on the mixed signal in the following manner: performing PCM decoding processing on the mixed signal;

Application example

In the railway dispatching private network, all the stations participating in the dispatching system form a chain network through one or a group of E1s, and there is one or a set of loopback protection E1 between the defined first node and the tail node (protecting E1 in normal It is redundant in operation and does not transmit useful signals. When an intermediate station fails or a certain working E1 fails, the protection E1 implements loopback protection to form a new chain network. As shown in FIG. 3, a scheduling system composed of five stations is taken as an example. Station 1 is the first node of the chain network, station 2 to station 4 are intermediate nodes of the chain network, and station 5 is the tail node of the chain network. Taking station 2 as an example, the E1 link between station 1 and station 2 is the uplink, and the link between station 3 and station 2 is the downlink.

Example 1

The voice transmission method of Example 1 includes the following steps:

S101. Allocate exclusive line slot resources for users participating in the collinear group at each site;

Since all the user signals participating in the collinear call are relayed in the same group of chain E1, the users of each station exclusively occupy a fixed time slot resource in the group E1.

S102: Send the voice coded signal of the local node to the line according to the time slot resource allocated by the node;

For the first station node and the intermediate station node, the voice coded signal of the local station user is connected to the corresponding time slot of the downlink E1;

For the tail station node, the voice coded signal of the user of the station is connected to the corresponding time slot of the uplink E1;

S103. Determine, according to the location of the node in the chain network, whether to forward the received voice coded signal.

For the first station node, the voice coded signal received from the line is not forwarded;

For the intermediate station node, transparently transmitting the voice coded signal received from the line;

For the tail station node, performing loopback processing on the voice coded signal received from the line;

S104: Perform mixing processing on the voice coded signals of other node users received from the transmission line, decode the mixed voice coded signals, and send the voice coded signals to the user of the node;

The signals transmitted on the time slots occupied by other stations on the E1 line are mixed and sent to the receiving circuit of the user of the station for PCM decoding, and the decoded signals are sent to the handset of the user of the station.

For example, the user configuring station 1 exclusively has time slot 1, the user configuring station 2 exclusively has time slot 2, the user configuring station 3 has exclusive time slot 3, the user configuring station 4 has exclusive time slot 4, and the user of station 5 has exclusive time slot. 5. The users of station 1 to station 5 respectively transmit the transmission signals of the station to the specified time slots, and the received signals of each user are a mixture of signals transmitted by other stations.

For example, the station 1 transmits the voice coded signal of the user of the station to the downlink time slot 1, and mixes the signals received from the downlink time slots 2, 3, 4, 5 and sends them to the receiving circuit of the user of the station;

Station 2 transmits the voice coded signal of the user of the station to the downlink time slot 2, and mixes the signals received from the downlink time slots 1, 3, 4, 5 and sends them to the user receiving circuit of the station; The signal received by the time slot 1 is transparently transmitted to the downlink time slot 1, and the signals received from the downlink time slots 1, 2, 3, 4, and 5 are transparently transmitted to the uplink time slots 1, 2, 3, 4, and 5;

Station 3 transmits the voice coded signal of the user of the station to the downlink time slot 3, and mixes the signals received from the downlink time slots 1, 2, 4, and 5 and sends them to the user receiving circuit of the station; The signals received in time slots 1, 2 are transparently transmitted to the downlink time slots 1, 2, and the signals received from the downlink time slots 1, 2, 3, 4, 5 are transparently transmitted to the uplink time slots 1, 2, 3, and 4. 5;

The station 4 transmits the voice coded signal of the user of the station to the downlink time slot 4, and mixes the signals received from the downlink time slots 1, 2, 3, and 5 and sends them to the user receiving circuit of the station; The signals received in slots 1, 2, and 3 are transparently transmitted to the downlink slots 1, 2, and 3, and the signals received from the downlink slots 1, 2, 3, 4, and 5 are transparently transmitted to the uplink slots 1, 2 , 3, 4, 5;

The station 5 sends the voice coded signal of the user of the station to the uplink time slot 5, and mixes the signals received from the uplink time slots 1, 2, 3, 4 and sends them to the user receiving circuit of the station; The signals received by time slots 1, 2, 3, 4 are looped back into the upstream time slots 1, 2, 3, 4.

5 is a schematic diagram of the operation of the head node of the chain network in the example 1, and FIG. 6 is a schematic diagram of the operation of the intermediate node of the chain network in the example 1 (taking the station 2 as an example), and FIG. 7 is the example 1 Schematic diagram of the work of the tail node of a chain network.

Example 2

The voice transmission method of Example 2 includes the following steps:

For the first station node, the voice coded signal of the local station is connected to the corresponding time slot of the downlink E1;

For the intermediate station node, the voice coded signal of the local station is connected to the corresponding time slot of the uplink E1 and the downlink E1;

For the tail station node, the voice coded signal of the local station is connected to the corresponding time slot of the uplink E1;

For the first station node and the tail station node, there is no need to forward the voice coded signal received from the line;

The station 2 simultaneously transmits the voice coded signal of the own station user to the downlink time slot 2 and the uplink time slot 2, and transmits the signal received from the uplink time slot 1 and the signal received from the downlink time slots 3, 4, and 5. After mixing, the user sent to the station receives the circuit; and the signal received from the uplink time slot 1 is transparently transmitted to the downlink time slot 1, and the signal received from the downlink time slots 3, 4, 5 is transparently transmitted to the uplink time slot. 3, 4, 5;

The station 3 simultaneously transmits the voice coded signal of the user of the station to the downlink time slot 3 and the uplink time slot 3, and transmits the signals received from the uplink time slots 1, 2 and the signals received from the downlink time slots 4, 5. After mixing, the user sent to the station receives the circuit; and the signals received from the uplink time slots 1, 2 are transparently transmitted to the downlink time slots 1, 2, and the signals received from the downlink time slots 4, 5 are transparently transmitted to the uplink. Gap 4, 5;

The station 4 simultaneously transmits the voice coded signal of the own station user to the downlink time slot 4 and the uplink time slot 4, and transmits the signal received from the uplink time slots 1, 2, 3 and the signal received from the downlink time slot 5 After mixing, the user sent to the station receives the circuit; and transmits the signals received from the uplink time slots 1, 2, and 3 to the downlink time slots 1, 2, and 3, and transparently transmits the signals received from the downlink time slot 5. Go to the upstream time slot 5;

The station 5 transmits the voice coded signal of the own station user to the uplink time slot 5, and mixes the signals received from the uplink time slots 1, 2, 3, 4 and sends them to the user receiving circuit of the own station.

8 is a schematic diagram of the operation of the head node of the chain network in Example 2, and FIG. 9 is a schematic diagram of the operation of the intermediate node of the chain network in Example 2 (taking the site 2 as an example), and FIG. 10 is an example 2; Schematic diagram of the work of the tail node of a chain network.

In addition, an embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, which are implemented when executed by a processor.

The method for transmitting voice in a collinear telephone system provided by the above embodiment, on a chain network The node encodes the voice signal of the user of the node and sends it to the line, and determines whether to forward the voice coded signal received from the line according to the position of the node on the chain network, and receive the received signal from the line. The voice coded signals of other node users are subjected to mixing processing, and the mixed signals are decoded and then sent to the user of the node. The voice transmission method of the embodiment of the invention enables more stations to join the collinear group, and the voice delay is small, the echo suppression effect is good, and the traditional implementation methods such as howling self-excitation and noise interference are eliminated, so that the collinearity can be significantly improved. The voice quality of the telephone system and reliability.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware, such as a processor, which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. Instructions to achieve their corresponding functions. This application is not limited to any specific combination of hardware and software.

It should be noted that various other embodiments and modifications may be made by those skilled in the art without departing from the spirit and scope of the application, Corresponding changes and modifications are intended to fall within the scope of the appended claims.

Industrial applicability

According to the technical solution provided by the embodiment of the present invention, the node on the chain network encodes the voice signal of the user of the node and sends the voice signal to the line, and determines whether to receive the slave line according to the location of the node on the chain network. The obtained voice coded signal is forwarded, and the voice coded signals of other node users received from the line are mixed and processed, and the mixed signal is decoded. And then sent to the user of this node. The voice transmission method of the embodiment of the invention enables more stations to join the collinear group, and the voice delay is small, the echo suppression effect is good, and the traditional implementation methods such as howling self-excitation and noise interference are eliminated, so that the collinearity can be significantly improved. The voice quality of the telephone system and reliability.

Claims

A method for transmitting voice in a collinear telephone system, applied to a node of a chain network, the method comprising:

Encoding the voice signal of the user of the node, and transmitting the voice coded signal of the user of the node to the line;

Determining whether to forward the voice coded signal received from the line according to the location of the node on the chain network;

The voice coded signals of other node users received from the line are mixed, and the mixed signals are decoded and then sent to the user of the node.
The method of claim 1 wherein:

Send the voice coded signal of the user of the node to the line, including:

When the node is the first node or the intermediate node of the chain network, the voice coded signal of the user of the node is sent to the adjacent downstream node on the downlink time slot allocated to the node;

When the node is a tail node of the chain network, the voice coded signal of the user of the node is sent to the adjacent upstream node on the uplink time slot allocated to the node;

Wherein, the downlink is a link between a node and an adjacent downstream node; the uplink is a link between the node and an adjacent upstream node;

Each node of the chain network is allocated a different time slot resource on the line to transmit a voice coded signal of the user of the node.
The method of claim 2 wherein:

Determining whether to forward the voice coded signal received from the line according to the location of the node on the chain network, including:

When the node is the first node of the chain network, the voice coded signal received from the downlink is not forwarded;

When the node is an intermediate node of the chain network, the voice coded signal received from the downlink is transparently transmitted to the uplink, and the voice coded signal received from the uplink is transparently transmitted to the downlink. On the link;

When the node is the tail node of the chain network, the voice coded signal received from the uplink is looped back to the uplink.
The method of claim 3 wherein:

Mixing the voice coded signals of other node users received from the line, including:

When the node is the first node or the intermediate node of the chain network, the voice coded signals of other node users received from the downlink are mixed and processed;

When the node is a tail node of the chain network, the voice coded signals of other node users received from the uplink are subjected to mixing processing.
The method of claim 1 wherein:

Send the voice coded signal of the user of the node to the line, including:

When the node is the first node of the chain network, the voice coded signal of the user of the node is sent to the adjacent downstream node on the downlink time slot allocated to the node;

When the node is an intermediate node of the chain network, the voice coded signal of the user of the node is sent to the adjacent downstream node on the downlink time slot allocated to the node, and when the uplink is allocated to the node Sending a voice coded signal of the user of the node to an adjacent upstream node;

When the node is a tail node of the chain network, the voice coded signal of the user of the node is sent to the adjacent upstream node on the uplink time slot allocated to the node;

Wherein, the downlink is a link between a node and an adjacent downstream node; the uplink is a link between the node and an adjacent upstream node;

Each node of the chain network is allocated a different time slot resource on the line to transmit a voice coded signal of the user of the node.
The method of claim 5 wherein:

Determining whether to forward the voice coded signal received from the line according to the location of the node on the chain network, including:

The voice coded signal received from the downlink when the node is the head node of the chain network No forwarding processing;

When the node is an intermediate node of the chain network, the voice coded signal received from the downlink is transparently transmitted to the uplink, and the voice coded signal received from the uplink is transparently transmitted to the downlink. on;

When the node is the tail node of the chain network, the voice coded signal received from the uplink is not forwarded.
The method of claim 6 wherein:

Mixing the voice coded signals of other node users received from the line, including:

When the node is the first node of the chain network, the voice coded signals of other node users received from the downlink are mixed and processed;

When the node is an intermediate node of the chain network, the voice coded signal of the upstream node user received from the uplink and the voice coded signal of the downstream node user received from the downlink are mixed and processed;

When the node is a tail node of the chain network, the voice coded signals of other node users received from the uplink are subjected to mixing processing.
The method of any of claims 1-7, wherein:

The line is an E1 link;

A bidirectionally transmitted E1 link is configured between any two nodes of the chain network.
A device for transmitting voice in a collinear telephone system, applied to a node of a chain network, comprising:

The user voice signal processing module of the node is configured to encode the voice signal of the user of the node, and send the voice coded signal of the user of the node to the line;

The line receiving signal processing module is configured to determine whether to forward the voice coded signal received from the line according to the position of the node on the chain network;

The other node user voice signal processing module is configured to perform mixing processing on the voice coded signals of other node users received from the line, decode the mixed signal, and then send the signal to the user of the node.
The apparatus of claim 9 wherein:

The user voice signal processing module of the node is configured to send the voice coded signal of the user of the node to the line in the following manner:

When the node is the first node or the intermediate node of the chain network, the voice coded signal of the user of the node is sent to the adjacent downstream node on the downlink time slot allocated to the node;

When the node is a tail node of the chain network, the voice coded signal of the user of the node is sent to the adjacent upstream node on the uplink time slot allocated to the node;

Wherein, the downlink is a link between a node and an adjacent downstream node; the uplink is a link between the node and an adjacent upstream node;

Each node of the chain network is allocated a different time slot resource on the line to transmit a voice coded signal of the user of the node.
The apparatus of claim 10 wherein:

The line receiving signal processing module is configured to determine whether to forward the voice coded signal received from the line according to the position of the node on the chain network in the following manner:

When the node is the first node of the chain network, the voice coded signal received from the downlink is not forwarded;

When the node is an intermediate node of the chain network, the voice coded signal received from the downlink is transparently transmitted to the uplink, and the voice coded signal received from the uplink is transparently transmitted to the downlink. on;

When the node is the tail node of the chain network, the voice coded signal received from the uplink is looped back to the uplink.
The apparatus of claim 11 wherein:

The other node user voice signal processing module is configured to perform sound mixing processing on the voice coded signals of other node users received from the line in the following manner:

When the node is the first node or the intermediate node of the chain network, the voice coded signals of other node users received from the downlink are mixed and processed;

When the node is a tail node of the chain network, the voice coded signals of other node users received from the uplink are subjected to mixing processing.
The apparatus of claim 9 wherein:

The user voice signal processing module of the node is configured to send the voice coded signal of the user of the node to the line in the following manner:

When the node is the first node of the chain network, the voice coded signal of the user of the node is sent to the adjacent downstream node on the downlink time slot allocated to the node;

When the node is an intermediate node of the chain network, the voice coded signal of the user of the node is sent to the adjacent downstream node on the downlink time slot allocated to the node, and when the uplink is allocated to the node Sending a voice coded signal of the user of the node to an adjacent upstream node;

When the node is a tail node of the chain network, the voice coded signal of the user of the node is sent to the adjacent upstream node on the uplink time slot allocated to the node;

Wherein, the downlink is a link between a node and an adjacent downstream node; the uplink is a link between the node and an adjacent upstream node;

Each node of the chain network is allocated a different time slot resource on the line to transmit a voice coded signal of the user of the node.
The apparatus of claim 13 wherein:

The line receiving signal processing module is configured to determine whether to forward the voice coded signal received from the line according to the position of the node on the chain network in the following manner:

When the node is the first node of the chain network, the voice coded signal received from the downlink is not forwarded;

When the node is an intermediate node of the chain network, the voice coded signal received from the downlink is transparently transmitted to the uplink, and the voice coded signal received from the uplink is transparently transmitted to the downlink. on;

When the node is the tail node of the chain network, the voice coded signal received from the uplink is not forwarded.
The apparatus of claim 14 wherein:

The other node user voice signal processing module is configured to perform sound mixing processing on the voice coded signals of other node users received from the line in the following manner:

When the node is the first node of the chain network, the voice coded signals of other node users received from the downlink are mixed and processed;

When the node is an intermediate node of the chain network, the voice coded signal of the upstream node user received from the uplink and the voice coded signal of the downstream node user received from the downlink are mixed and processed;

When the node is a tail node of the chain network, the voice coded signals of other node users received from the uplink are subjected to mixing processing.
A device according to any of claims 9-15, wherein:

The line is an E1 link;

A bidirectionally transmitted E1 link is configured between any two nodes of the chain network.
A computer readable storage medium storing computer executable instructions that, when executed by a processor, implement the method of any of the preceding claims 1-8.