CN111432294B - Wireless communication method and system of full-duplex interphone - Google Patents
Wireless communication method and system of full-duplex interphone Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
- H04Q5/24—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange for two-party-line systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1423—Two-way operation using the same type of signal, i.e. duplex for simultaneous baseband signals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides a wireless communication method and a system of a full-duplex interphone, wherein the method comprises the following steps: step 1, dividing a frequency point for transmission into a plurality of time slots, and determining whether a first interphone has an idle time slot in the plurality of current time slots under the frequency point; if yes, randomly selecting one of the idle gaps to send voice data, and updating the time slot state; if not, the transmission is refused; step 2, receiving the voice data and extracting a receiving time slot number of a time slot in which the voice data is positioned; simultaneously determining whether the first interphone is a response group of the second interphone or not according to the receiving time slot number; if yes, carrying out voice decoding output on the voice data; and if not, no response is carried out. The invention can meet the requirement of carrying out multi-party call by using the interphone.
Description
Technical Field
The invention relates to the technical field of interphone communication, in particular to a wireless communication system of a full-duplex interphone.
Background
The interphone is a wireless communication terminal device capable of performing point-to-multipoint communication, and enables multiple people to listen to the speaking content of the same person at the same time. The method has the characteristics of timely communication, one-click response, economy and practicality, low operation cost, no consumption of communication expense and the like, and also has the functions of group calling broadcasting, system calling, confidential calling and the like. When handling emergency, the role of the system in dispatching command can not be replaced by other communication tools.
Under the digital direct communication, the traditional PDT interphone belongs to a half-duplex mode, namely, data is transmitted in a TDMA (double time slot) multiple access mode, and the transmission mode only allows one person to talk and other persons to answer at the same time, so that the urgent requirement of simultaneous multi-party communication cannot be met. Moreover, the existing full-duplex communication scheme can only be applied to mobile phone communication basically, but cannot be applied to interphones.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a wireless communication method and a wireless communication system of a full-duplex interphone, which can meet the requirement of carrying out multi-party call by utilizing the interphone.
The technical scheme of the invention is realized as follows:
a wireless communication method of a full-duplex interphone comprises the following steps:
step 1, dividing a frequency point for transmission into a plurality of time slots, and determining whether a plurality of current time slots have idle time slots by a first interphone at the frequency point; if yes, randomly selecting one of the idle gaps to send voice data, and updating the time slot state; if not, the transmission is refused;
step 2, the second intercom receives the said voice data, and withdraw the receiving time slot number of the time slot where the voice data locates; simultaneously determining whether the first interphone is a response group of the second interphone or not according to the receiving time slot number; if yes, carrying out voice decoding output on the voice data; and if not, no response is carried out.
Further, when there are a plurality of first intercom sets simultaneously transmitting voice data, step 2 includes the following substeps:
step 201, receiving voice data sent by each first interphone, and extracting a receiving time slot number of a time slot in which each voice data is located; simultaneously determining whether a first interphone has a response group of a second interphone according to the receiving time slot number;
and 202, if yes, decoding and outputting the voice data of the time slot belonging to the second interphone response group.
Further, when the response group of the second interphone has only one first interphone, the step 2 comprises the following substeps:
step 201a, the second interphone receives the voice data sent by the first interphone according to the time slot number selected by the first interphone;
step 201a, encoding and outputting the voice data.
Further, when the response group of the second interphone includes a plurality of first interphones, the step 2 includes the following substeps:
step 201b, receiving the voice data sent by each first interphone, and extracting the receiving time slot number of the time slot in which each voice data is located; determining which first interphone is a response group of the second interphone according to the receiving time slot number;
step 202b, decoding the voice data of the time slot where the second interphone response group is located;
step 203b, synthesizing and outputting each decoded voice data.
Further, in step 1, after the voice data to be transmitted by the first intercom is encoded, one of the idle gaps is randomly selected for transmission.
The invention discloses a wireless communication system of a full duplex interphone, comprising:
the voice data sending module is used for dividing a frequency point for transmission into a plurality of time slots, and the first interphone determines whether idle time slots exist in the plurality of current time slots or not at the frequency point; if yes, randomly selecting one of the idle gaps to send voice data, and updating the time slot state; if not, the transmission is refused;
the voice data decoding module is used for receiving the voice data by the second interphone and extracting a receiving time slot number of a time slot in which the voice data is positioned; meanwhile, whether the first interphone is a response group of the second interphone is determined according to the receiving time slot number; if yes, carrying out voice decoding output on the voice data; and if not, no response is carried out.
Further, the voice data decoding module comprises
The response group determining unit is used for receiving the voice data sent by each first interphone and extracting the receiving time slot number of the time slot in which each voice data is positioned; simultaneously determining whether a first interphone has a response group of a second interphone according to the receiving time slot number;
and the voice decoding output unit is used for decoding and outputting the voice data of the time slot where the second interphone response group is located.
Further, when the response group of the second interphone only has one first interphone,
a response group determination unit, which is specifically used for receiving the voice data sent by the first interphone according to the time slot number selected by the first interphone;
and the voice decoding output unit is specifically used for decoding and outputting the voice data.
Further, when the response set of the second interphone includes a plurality of first interphones,
the response group determining unit is used for receiving the voice data sent by each first interphone and extracting the receiving time slot number of the time slot in which each voice data is positioned; determining which first interphone is a response group of the second interphone according to the receiving time slot number;
and the voice decoding output unit is used for decoding the voice data of the time slot where the second interphone response group is located, and synthesizing and outputting the decoded voice data.
Further, the voice data sending module is further configured to code the voice data to be sent by the first intercom, and then randomly select one of the idle gaps to send.
Compared with the prior art, the invention has the following advantages: according to the invention, the frequency points for transmission are divided into a plurality of time slots, and when a first interphone needs to initiate a call, the voice data is sent by using the idle time slots, so that the first interphone is prevented from interfering with the receiving of the voice data sent by other interphones, and the requirement that the interphones simultaneously carry out multi-party communication is met; therefore, the invention respectively realizes the transmission and the reception of voice by a way of one channel in every two time slots, staggers the time slots for transmission and reception, avoids the self-excitation interference of the same-frequency signals and realizes the full duplex mode with the same frequency at the same time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of an embodiment of a wireless communication method of a full duplex interphone according to the invention;
fig. 2 is a block diagram of a wireless communication system of a full duplex intercom according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be 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 of the 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.
Referring to fig. 1, an embodiment of the present invention provides a wireless communication method for a full duplex interphone, including the following steps:
step 1, dividing a frequency point for transmission into a plurality of time slots, and determining whether a first interphone has an idle time slot in the plurality of current time slots under the frequency point; if yes, randomly selecting one of the idle gaps to send voice data, and updating the time slot state; if not, the transmission is refused;
step 2, the second intercom receives the said voice data, and withdraw the receiving time slot number of the time slot where the voice data locates; simultaneously determining whether the first interphone is a response group of the second interphone or not according to the receiving time slot number; if yes, carrying out voice decoding output on the voice data; and if not, no response is carried out.
Referring to fig. 2, the present invention also discloses a wireless communication system of a full duplex interphone, comprising:
the voice data sending module is used for dividing a frequency point for transmission into a plurality of time slots, and the first interphone determines whether idle time slots exist in the plurality of current time slots or not at the frequency point; if yes, randomly selecting one of the idle gaps to send voice data, and updating the time slot state at the same time; if not, the transmission is refused;
the voice data decoding module is used for receiving the voice data and extracting a receiving time slot number of a time slot in which the voice data is positioned; simultaneously determining whether the first interphone is a response group of the second interphone or not according to the receiving time slot number; if yes, carrying out voice decoding output on the voice data; and if not, no response is carried out.
In this embodiment, the wireless communication method of the full-duplex walkie-talkie is performed by taking the wireless communication system of the full-duplex walkie-talkie as an execution target of the procedure, or by taking each module in the system as an execution target of the procedure. Specifically, step 1 takes a voice data transmission module as an execution object of the step, and step 2 takes a voice data decoding module as an execution object of the step.
In step 1, dividing frequency points for communicating with the interphones under the same group network into a plurality of time slots, when a first interphone sends a call request, firstly, inquiring whether a plurality of current time slots have idle time slots, and if so, randomly selecting one of the idle time slots to initiate a call; if no idle time slot exists in the current time slot, the call is failed; the first intercom call is only allowed if there is currently a free time slot.
In step 2, receiving voice data sent by a first interphone; and simultaneously, the second interphone determines whether the first interphone is a response group of the second interphone or not according to the receiving time slot number, and if so, voice coding output is carried out on voice data, so that the second interphone can hear voice information sent by the first interphone.
Specifically, when there are a plurality of first intercom sets simultaneously transmitting voice data, step 2 includes the following substeps:
step 201, receiving voice data sent by each first interphone, and extracting a receiving time slot number of a time slot in which each voice data is located; simultaneously determining whether a first interphone has a response group of a second interphone according to the receiving time slot number;
and 202, if yes, decoding and outputting the voice data of the time slot where the second interphone response group is located.
Correspondingly, when a plurality of first interphones send voice data simultaneously, the voice data decoding module in the wireless communication system of the full-duplex interphone comprises
The response group determining unit is used for receiving the voice data sent by each first interphone and extracting the receiving time slot number of the time slot in which each voice data is positioned; meanwhile, determining whether a first interphone has a response group of a second interphone according to the receiving time slot number;
and the voice decoding output unit is used for decoding and outputting the voice data of the time slot where the second interphone response group is located.
Step 2 is to execute the steps by using each unit in the sound data decoding module. Specifically, step 201 takes the response group determination unit as an execution object of the step, and step 202 takes the speech decoding output unit as an execution object of the step.
Whether to output voice data is decided by determining whether the first interphone is a response group of the second interphone according to the reception slot number, thereby facilitating quick communication. Specifically, the second interphone determines the calling number of the first interphone according to the receiving time slot number, so as to determine whether the first interphone is a response group of the second interphone.
Specifically, when the response group of the second interphone has only one first interphone, the step 2 includes the following substeps:
step 201a, the second interphone receives the voice data sent by the first interphone according to the time slot number selected by the first interphone;
step 201a, decoding and outputting the voice data.
Correspondingly, when the response group of the second interphone only has one first interphone,
a response group determination unit, which is specifically used for receiving the voice data sent by the first interphone according to the time slot number selected by the first interphone;
and the voice decoding output unit is specifically used for encoding and outputting the voice data.
Similarly, step 201a is an object of execution of the step by the response group determination unit, and step 202a is an object of execution of the step by the speech decoding output unit.
In the embodiment of the invention, digital direct communication between every two interphones can be realized by setting the response group of the first interphone and setting the response group of the second interphone, namely setting the response group of one of the first interphones to be only one of the second interphones and setting the response group of the second interphone to be only the first interphone; because the response groups of the first interphone and the second interphone are determined, the voice data transmitted in the corresponding time slot numbers can be directly decoded and output, so that the digital direct communication between the first interphone and the second interphone is realized.
For example, in step 1, when the frequency points for communicating with the interphones in the same group are divided into 6 time slots, each two time slots form a full-duplex voice channel, and at most 3 voice channels can be simultaneously accommodated, that is, the interphone a and the interphone B occupy two of the time slots to realize digital direct communication, the interphone C and the interphone D occupy two of the time slots to realize digital direct communication, and the interphone E and the interphone F occupy two of the time slots to realize digital direct communication; the communication mode satisfies the communication among a plurality of groups of people and improves the working efficiency of the interphone.
In addition, when the frequency points for the communication of the interphones under the same networking are divided into 6 time slots, 2 voice channels or 1 voice channel can be formed. When 2 voice channels are formed, the interphone A, the interphone B and the interphone C form one voice channel, and the interphone D, the interphone E and the interphone F form the other voice channel; when 1 voice channel is formed, the interphone A, the interphone B, the interphone C, the interphone D, the interphone E and the interphone F form one voice channel; this response group, which is referred to as a second interphone hereinafter, includes a plurality of first interphones.
When the response group of the second interphone includes a plurality of first interphones, the step 2 includes the following substeps:
step 201b, receiving the voice data sent by each first interphone, and extracting the receiving time slot number of the time slot in which each voice data is located; determining which first interphone is a response group of the second interphone according to the receiving time slot number;
step 202b, decoding the voice data of the time slot where the second interphone response group is located;
step 203b, synthesizing and outputting each decoded voice data.
Correspondingly, when the response group of the second interphone comprises a plurality of first interphones,
the response group determining unit is used for receiving the voice data sent by each first interphone and extracting the receiving time slot number of the time slot in which each voice data is positioned; determining which first interphone is a response group of the second interphone according to the receiving time slot number;
and the voice decoding output unit is used for decoding the voice data of the time slot belonging to the second interphone response group and synthesizing and outputting the decoded voice data.
Similarly, step 201b is an object of execution of the step by the response group determination unit, and steps 202b to 203b are objects of execution of the step by the speech decoding output unit.
For example, when the frequency points for communicating with the interphones under the same networking are divided into 6 time slots, it is assumed that the interphones a, B and C can talk with each other, and the interphones D, E and F can talk with each other. Wherein, the interphone A, the interphone B, the interphone C, the interphone D and the interphone E are set as a first interphone, and the interphone F is set as a second interphone; then
In step 202B, assuming that the interphone A, the interphone B, the interphone C, the interphone D and the interphone E respectively send voice data through the time slots, the interphone F determines that the interphone C and the interphone D are response groups of the interphone F according to the receiving time slot numbers, and the interphone A, the interphone B and the interphone C are not response groups of the interphone F;
in step 202B and step 203B, since the response group of the F interphone has been determined in step 201B, the interphone F decodes the voice data in the time slot selected by the voice data sent by the C interphone and the D interphone at the same time, and then synthesizes and outputs the decoded voice data, thereby realizing the mutual digital direct communication among the a interphone, the B interphone and the C interphone.
Further, in step 1, after the voice data to be transmitted by the first intercom is encoded, one of the idle gaps is randomly selected for transmission.
Correspondingly, the voice data sending module is also used for coding the voice data to be sent by the first interphone and then randomly selecting one of the idle gaps to send.
In the embodiment of the invention, the first interphone randomly selects one of the idle gaps to send the voice data, and after the first interphone is determined to be the response group of the second interphone, the voice data transmitted in the gap are directly decoded and output, so that the function of mutual digital direct communication between the interphones is realized, and the requirement of multi-party communication is met.
In summary, the frequency point for transmission is divided into a plurality of time slots, and when a first interphone needs to initiate a call, the voice data is sent by using the idle time slot, so that the first interphone is prevented from interfering with the reception of the voice data sent by other interphones, and the requirement that the interphones simultaneously carry out multi-party call is met; therefore, the invention respectively realizes the transmission and the reception of voice by a way of one channel in every two time slots, staggers the time slots for transmission and reception, avoids the self-excitation interference of the same-frequency signals and achieves the full duplex mode with the same frequency at the same time.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A wireless communication method of a full-duplex interphone is characterized by comprising the following steps:
step 1, dividing a frequency point for transmission into a plurality of time slots, and determining whether a first interphone has an idle time slot in the plurality of current time slots under the frequency point; if yes, randomly selecting one of the idle gaps to send voice data, and updating the time slot state; if not, the transmission is refused;
step 2, receiving the voice data and extracting a receiving time slot number of a time slot in which the voice data is positioned; simultaneously determining whether the first interphone is a response group of the second interphone or not according to the receiving time slot number; if yes, carrying out voice decoding output on the voice data; if not, no response is made;
when a plurality of first interphones simultaneously send voice data, step 2 includes the following substep:
step 201, receiving voice data sent by each first interphone, and extracting a receiving time slot number of a time slot in which each voice data is located; simultaneously determining whether a response group of a second interphone exists in a first interphone according to the receiving time slot number;
step 202, if yes, decoding and outputting the voice data of the time slot where the second interphone response group is located;
when the response group of the second interphone includes a plurality of first interphones, the step 2 includes the following substeps:
step 201b, receiving the voice data sent by each first interphone, and extracting the receiving time slot number of the time slot in which each voice data is located; determining which first interphone is a response group of the second interphone according to the receiving time slot number;
step 202b, decoding the voice data of the time slot where the second interphone response group is located;
step 203b, synthesizing and outputting each decoded voice data.
2. The wireless communication method of the full duplex interphone according to claim 1, characterized in that when the response set of the second interphone has only one of the first interphones, the step 2 comprises the following substeps:
step 201a, the second interphone receives the voice data sent by the first interphone according to the time slot number selected by the first interphone;
step 201a, decoding and outputting the voice data.
3. The wireless communication method of the full duplex interphone according to claim 1, characterized in that in step 1, the voice data to be transmitted by the first interphone is encoded and then one of the idle slots is randomly selected for transmission.
4. A wireless communication system of a full-duplex interphone is characterized by comprising:
the voice data sending module is used for dividing a frequency point for transmission into a plurality of time slots, and the first interphone determines whether idle time slots exist in the plurality of current time slots or not at the frequency point; if yes, randomly selecting one of the idle gaps to send voice data, and updating the time slot state; if not, the transmission is refused;
the voice data decoding module is used for receiving the voice data and extracting a receiving time slot number of a time slot in which the voice data is positioned; simultaneously determining whether the first interphone is a response group of the second interphone or not according to the receiving time slot number; if yes, carrying out voice decoding output on the voice data; if not, no response is made;
the voice data decoding module comprises
The response group determining unit is used for receiving the voice data sent by each first interphone and extracting the receiving time slot number of the time slot in which each voice data is positioned; simultaneously determining whether a first interphone has a response group of a second interphone according to the receiving time slot number;
the voice decoding output unit is used for decoding and outputting the voice data of the time slot belonging to the second interphone response group;
when the response set of the second interphone includes a plurality of first interphones,
the response group determining unit is used for receiving the voice data sent by each first interphone and extracting the receiving time slot number of the time slot in which each voice data is positioned; determining which first interphone is a response group of the second interphone according to the receiving time slot number;
and the voice decoding output unit is used for decoding the voice data of the time slot where the second interphone response group is located, and synthesizing and outputting the decoded voice data.
5. The wireless communication system of the full duplex intercom of claim 4, wherein when the response set of the second intercom has only one of the first intercom,
a response group determination unit, which is specifically used for receiving the voice data sent by the first interphone according to the time slot number selected by the first interphone;
and the voice decoding output unit is specifically used for decoding and outputting the voice data.
6. The wireless communication system of claim 4, wherein the voice data transmitting module is further configured to randomly select one of the idle slots for transmission after encoding the voice data to be transmitted by the first interphone.
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| CN115967914A (en) * | 2022-11-23 | 2023-04-14 | 海能达通信股份有限公司 | Calling method, terminal and storage medium of narrow-band private network |
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| CN110198497A (en) * | 2019-06-21 | 2019-09-03 | 福建省万华电子科技有限公司 | A kind of digital walkie-talkie and its communication means of common-frequency time division duplex |
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| US7436791B2 (en) * | 2003-12-08 | 2008-10-14 | Research In Motion Limited | Methods and apparatus for providing slot reservations for slotted messages in wireless communication networks |
| EP2217019B1 (en) * | 2008-09-28 | 2017-08-30 | Hytera Communications Corp., Ltd. | Communication terminal, communication system and realization method for dmr special network |
| CN102710995B (en) * | 2012-06-11 | 2014-08-27 | 耿直 | Talkback and video data transmitting method based on wireless local area network, and talkback commutator |
| CN109005516A (en) * | 2018-08-01 | 2018-12-14 | 北京中兴高达通信技术有限公司 | The transmission method and device of Media Stream |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101689919A (en) * | 2008-09-28 | 2010-03-31 | 深圳市好易通科技有限公司 | Method for implementing digital mobile radio private network communication, digital mobile radio private network communication terminal, relay station and system |
| CN108541081A (en) * | 2018-04-17 | 2018-09-14 | 福建北峰通信科技股份有限公司 | A kind of small cluster method of construction of intercommunication of analog- and digital- DMR compatibilities |
| CN110198497A (en) * | 2019-06-21 | 2019-09-03 | 福建省万华电子科技有限公司 | A kind of digital walkie-talkie and its communication means of common-frequency time division duplex |
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