CN111182476A - DMR/PDT multi-carrier frequency base station communication system and carrier frequency base station communication method thereof - Google Patents
DMR/PDT multi-carrier frequency base station communication system and carrier frequency base station communication method thereof Download PDFInfo
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- CN111182476A CN111182476A CN202010009869.8A CN202010009869A CN111182476A CN 111182476 A CN111182476 A CN 111182476A CN 202010009869 A CN202010009869 A CN 202010009869A CN 111182476 A CN111182476 A CN 111182476A
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- base station
- carrier frequency
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W4/10—Push-to-Talk [PTT] or Push-On-Call services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
Abstract
The invention discloses a DMR/PDT multi-carrier frequency base station communication system, belonging to the field of communication systems, comprising at least one DMR/PDT carrier frequency base station and a plurality of terminals, wherein the terminals communicate with the DMR/PDT carrier frequency base station in a wireless link mode, the DMR/PDT carrier frequency base station comprises a carrier frequency control center, the carrier frequency control center comprises a control channel machine and at least one voice channel machine, the control channel machine sends control signaling to the terminals within the network coverage range by fixed frequency, and the control channel machine sends a line establishing instruction to the corresponding voice channel machine according to a call request. The invention also provides a communication method of the carrier frequency base station. The DMR/PDT multi-carrier frequency base station communication system disclosed by the invention can conveniently realize the switching of different working modes of the carrier frequency base station communication system, and can meet the conventional communication of a small number of mobile stations and the trunking communication of a large number of mobile stations.
Description
Technical Field
The invention relates to the field of base station communication systems, in particular to a DMR/PDT multi-carrier frequency base station communication system and a carrier frequency base station communication method for the base station communication system.
Background
The carrier frequency base station communication system refers to an overall communication system consisting of a transmitter and a receiver operated by a cluster system controller in a specific area. When a plurality of carrier frequency base stations are networked, the networking is generally performed through network cables.
The carrier frequency base station usually has two operation modes, one is a cluster operation mode, and the other is a normal operation mode. In the cluster working mode, the system can simultaneously support simultaneous communication of a plurality of mobile stations, thereby being suitable for the situation with more mobile stations, and in the conventional working mode, the system can simultaneously support a plurality of mobile stations by a plurality of channels, thereby being suitable for the situation with less mobile stations. The existing carrier frequency base station can not be compatible with two working modes at the same time, namely, the free switching between the common working mode corresponding to six voice channels and the cluster working mode of a plurality of voice channels working at the same time can not be realized, so that the use convenience of the carrier frequency base station is greatly reduced.
Disclosure of Invention
In order to overcome the defects of the prior art, the technical problem to be solved by the invention is to provide a DMR/PDT multi-carrier frequency base station communication system, which can conveniently realize the switching of different working modes of the carrier frequency base station communication system, and can meet the conventional communication of a small number of mobile stations and the trunking communication of a large number of mobile stations.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a DMR/PDT multi-carrier frequency base station communication system, which comprises at least one DMR/PDT carrier frequency base station and a plurality of terminals, wherein the terminals are communicated with the DMR/PDT carrier frequency base station in a wireless link mode, and the DMR/PDT carrier frequency base station comprises a carrier frequency control center.
And setting the carrier frequency control center to be in a cluster working mode.
The carrier frequency control center comprises a control channel machine and at least one voice channel machine.
The control channel machine sends control signaling to the terminals within the network coverage range at a fixed frequency.
After receiving the voice, any terminal generates a call request and transmits the call request to the control channel machine, and the control channel machine sends a line establishing instruction to the corresponding voice channel machine according to the call request.
The invention further adopts the technical scheme that the control channel machine comprises an instruction control unit and a fixed frequency radio frequency device, and a signal interface of the instruction control unit is electrically connected with the fixed frequency radio frequency device through a first-class CAN bus.
The invention further adopts the technical scheme that the voice channel machine comprises a voice control unit, a low-frequency radio frequency device and a high-frequency radio frequency device, wherein a low-frequency interface of the voice control unit is electrically connected with the low-frequency radio frequency device, and a high-frequency interface of the voice control unit is electrically connected with the high-frequency radio frequency device.
The further technical scheme of the invention is that the carrier frequency control center comprises a control channel machine and five voice channel machines.
The further technical scheme of the invention is that the carrier frequency control center is arranged to convert the cluster working mode into a conventional working mode, the carrier frequency control center comprises at least one voice channel machine, and each voice channel machine receives the call request of the terminal corresponding to the voice channel machine.
The further technical scheme of the invention is that the carrier frequency control center comprises six voice channel machines.
The invention further adopts the technical scheme that the DMR/PDT carrier frequency base station also comprises a base station antenna, and the base station antenna is electrically connected with the carrier frequency control center.
The invention further adopts the technical scheme that the DMR/PDT carrier frequency base station also comprises a key panel, and the key panel is electrically connected with the carrier frequency control center.
The invention also provides a carrier frequency base station communication method, which is used for the DMR/PDT multi-carrier frequency base station communication system and is implemented according to the following steps:
setting a carrier frequency control center in a cluster working mode:
and after any terminal is in the network coverage range of the carrier frequency base station, the terminal is networked with the base station.
The control channel machine in the carrier frequency control center sends control signaling to the terminal at fixed frequency in timing.
After receiving the user call information, any terminal generates a call request and transmits the call request to the control channel machine.
The control channel machine judges the number of line building and the terminal identity according to different calling requests, and sends line building instructions to the corresponding number of voice channel machines, and the voice channel machines and the corresponding terminals complete line building.
After the line is established, each voice channel machine receives the calling information of the corresponding terminal.
After the call is completed, the terminal sends a disconnection request to the control channel machine.
And after the control channel machine confirms the disconnecting request, sending a disconnecting instruction to the terminal, and ending the call.
The invention has the further technical scheme that the carrier frequency control center is arranged to convert the cluster working mode into a conventional working mode, after any terminal is positioned in the network coverage range of the carrier frequency base station, any terminal receives user calling information, generates a calling request and transmits the calling request to the voice channel machine, and the voice channel machine receives the calling information corresponding to the terminal.
The invention has the beneficial effects that:
the communication system of the DMR/PDT multi-carrier frequency base station provided by the invention is provided with the carrier frequency control center, and the carrier frequency control center can switch the control channel machine in the cluster working mode into the voice channel machine in the conventional working mode, so that the wire connection and disconnection operation in the cluster working mode can be effectively realized, the working scene of a plurality of voice channels in the conventional working mode can be met, and the communication system of the DMR/PDT multi-carrier frequency base station can simultaneously give consideration to different working modes and application scenes. In addition, the DMR/PDT multi-carrier frequency base station communication system provided by the invention realizes the wire connection and disconnection by controlling the channel machine, can effectively control the conversation sequence and ensures that a plurality of voice channels are not interfered with each other in a cluster working mode.
Drawings
Fig. 1 is a schematic structural diagram of a DMR/PDT multi-carrier base station communication system according to an embodiment of the present invention, wherein the DMR/PDT multi-carrier base station communication system is in a cluster working mode;
FIG. 2 is a schematic structural diagram of a DMR/PDT multi-carrier frequency base station communication system in a normal operation mode according to an embodiment of the present invention
Fig. 3 is a flowchart of a carrier frequency base station communication method according to an embodiment of the present invention, where the DMR/PDT multi-carrier frequency base station communication system is in a cluster operating mode.
In the figure:
1. DMR/PDT carrier frequency base station; 2. a terminal; 11. a carrier frequency control center; 111. a control channel machine; 112. a voice channel machine; 1111. an instruction control unit; 1112. a fixed frequency radio frequency; 1121. a voice control unit; 1122. a low frequency radio frequency; 1123. a high frequency radio frequency; 12. a base station antenna; 13. a key panel.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Example one
As shown in fig. 1, an embodiment of a DMR/PDT multi-carrier base station communication system includes at least one DMR/PDT carrier base station 1 and a plurality of terminals 2, wherein the plurality of terminals 2 communicate with the DMR/PDT carrier base station 1 through a wireless link, the DMR/PDT carrier base station 1 includes a carrier control center 11, and the terminals 2 are typically mobile stations or intercom devices capable of communicating with the base station. When the DMR/PDT multi-carrier base station communication system is in the trunking working mode, the carrier frequency control center 11 is set to be in the trunking working mode by a button of the key panel 13, and at this time, the carrier frequency control center 11 includes a control channel machine 111 and at least one voice channel machine 112, the control channel machine 111 is used for establishing and disconnecting the voice channel machine 112, and the voice channel machine 112 is used for receiving and transmitting voice information. The control channel machine 111 sends control signaling to the terminal 2 within its network coverage area at a fixed frequency, so that the control channel machine 111 and the terminal 2 maintain network connection, that is, the terminal 2 can find the carrier frequency control center 11. After receiving the voice from the user, any terminal 2 will generate a call request and transmit it to the control channel machine 111, the control channel machine 111 will send a line establishing instruction to the corresponding voice channel machine 112 according to the call request, and the terminal 2 will transmit the voice of the user to the carrier frequency control center 11 through the voice channel machine 112.
In order to facilitate the connection and disconnection of the control channel unit 111, further, the control channel unit 111 includes an instruction control unit 1111 and a fixed frequency rf 1112, a signal interface of the instruction control unit 1111 is electrically connected to the fixed frequency rf 1112 through a first type CAN bus, and the instruction control unit 1111 is configured to send a disconnection instruction and a connection instruction. After receiving the voice sent by the user, any terminal 2 generates a call request and transmits the call request to the control channel machine 111, the control channel machine 111 sends a wire building instruction to the corresponding voice channel machine 112 according to the call request, and then receives the voice of the user through the voice channel machine 112, after the voice transmission of the user is completed, the terminal 2 sends a wire disconnecting request to the control channel machine 111, and after the carrier frequency control center 11 determines the wire disconnecting request, the carrier frequency control center sends a wire disconnecting instruction to the terminal 2 through the control channel machine 111.
In order to facilitate the carrier frequency control center 11 to perform voice communication, the voice channel machine 112 further includes a voice control unit 1121, a low frequency rf 1122 and a high frequency rf 1123, a low frequency interface of the voice control unit 1121 is electrically connected to the low frequency rf 1122, and a high frequency interface of the voice control unit 1121 is electrically connected to the high frequency rf 1123. The voice control unit 1121 is used for controlling the transceiving of signals of the low frequency rf 1122 and the high frequency rf 1123, the high frequency rf 1123 is used for transmitting and receiving high band frequency signals, and the low frequency rf 1122 is used for transmitting and receiving low band frequency signals. The high frequency rf 1123 has a higher transmit/receive frequency than the low frequency rf 1122, and as a whole, the voice channelizer 112 has a receive frequency range of 351-356MHz and a transmit frequency range of 361-366 MHz.
It is further preferred that the carrier frequency control center 11 includes a control channel unit 111 and five voice channel units 112. The DMR/PDT multi-carrier base station communication system provided in this embodiment can support six channels at most. Therefore, in the centralized operation mode, one control channel machine 111 is usually set for establishing and disconnecting, the remaining five control channel machines are all used as voice channel machines 112, and the more voice channel machines 112 are, the more terminals 2 can be supported for conversation, in this embodiment, it is preferable that the maximum number of the control channel machines can simultaneously support five terminals 2 for simultaneous communication, when more than five terminals 2 appear in the network coverage, the exceeding terminals 2 need to wait when passing, and the call is resumed after a certain terminal 2 completes the disconnecting.
Example two
As shown in fig. 2, the DMR/PDT multi-carrier base station communication system provided in the second embodiment includes at least one DMR/PDT carrier base station 1 and a plurality of terminals 2, wherein the plurality of terminals 2 communicate with the DMR/PDT carrier base station 1 through a wireless link, the DMR/PDT carrier base station 1 includes a carrier control center 11, and the terminals 2 are typically mobile stations or intercom devices capable of being used for communication with the base station. Several terminals 2 communicate with the carrier frequency control center 11 by means of wireless links. The difference between the first embodiment and the second embodiment is that:
the working mode of the carrier frequency control center 11 is set, the trunking working mode is converted into the normal working mode, specifically, the own communication protocol of the carrier frequency control center 11 includes a communication protocol corresponding to the trunking working mode and a communication protocol corresponding to the normal working mode, and the carrier frequency control center 11 is switched through the working mode to convert the control channel machine 111 in the trunking working mode into the voice channel machine 112 in the normal working mode, that is, at this time, the carrier frequency control center 11 includes at least one voice channel machine 112, but does not include the control channel machine 111. At this time, the DMR/PDT multi-carrier base station communication system is in a single-machine working state, and each voice channel machine 112 receives the call request of the terminal 2 corresponding thereto and directly transmits the call request to the carrier control center 11 for processing. Preferably, the carrier frequency control center 11 includes six voice channelizers 112 supporting simultaneous communication with six terminals 2 within its network coverage area.
Further, the DMR/PDT carrier base station 1 further includes a base station antenna 12, the base station antenna 12 is electrically connected to the carrier control center 11, each channel in the carrier control center 11 receives and transmits signals through the base station antenna 12, and the base station antenna 12 can enhance the network coverage of the DMR/PDT multi-carrier base station communication system.
Further, the DMR/PDT carrier base station 1 further includes a key panel 13, and the key panel 13 is electrically connected to the carrier control center 11. The operating mode of the DMR/PDT carrier base station 1 can be adjusted by the keys on the key panel 13, that is, the operating mode of the DMR/PDT carrier base station 1 is switched by the keys.
EXAMPLE III
As shown in fig. 3, a carrier frequency base station communication method provided in the third embodiment is applied to the DMR/PDT multi-carrier frequency base station communication system, and implemented according to the following steps:
and step S00: the carrier frequency control center 11 is set in a cluster operating mode.
And step S10: after any terminal 2 is in the network coverage of the carrier frequency base station, the terminal 2 and the carrier frequency base station are networked, that is, the networking state between the networking carrier frequency control center 11 and the plurality of terminals 2. The control channel machine 111 in the carrier frequency control center 11 sends control signaling to the terminal 2 at a fixed frequency in a timing manner. The control channel machine 111 sends control signaling to the terminal 2 within its network coverage area at a fixed frequency, so that the control channel machine 111 and the terminal 2 maintain network connection, that is, the terminal 2 can find the carrier frequency control center 11.
And step S20: after receiving the user call information, any terminal 2 generates a call request and transmits the call request to the control channel machine 111, the control channel machine 111 judges the number of line establishment and the identity of the terminal 2 according to different call requests, and sends a line establishment instruction to the corresponding number of voice channel machines 112, and the voice channel machines 112 complete line establishment with the corresponding terminals 2.
And step S30: after the line establishment is completed, each voice channel machine 112 receives the call information of the corresponding terminal 2.
And step S40: after the call is completed, the terminal 2 sends a disconnect request to the control channel machine 111. After confirming the disconnect request, the control channel unit 111 sends a disconnect command to the terminal 2, and the call is terminated.
Example four
The carrier frequency base station communication method provided in the fourth embodiment is applied to the DMR/PDT multi-carrier frequency base station communication system, and is implemented according to the following steps:
and setting a carrier frequency control center 11, and converting the cluster working mode into a conventional working mode.
After any terminal 2 is in the network coverage of the carrier frequency base station, after any terminal 2 receives the user call information, a call request is generated and transmitted to the voice channel machine 112, and the voice channel machine 112 receives the call information of the terminal 2 corresponding to the call request. At this time, the DMR/PDT multi-carrier base station communication system is in a single-machine working state, and each voice channel machine 112 receives the call request of the terminal 2 corresponding thereto and directly transmits the call request to the carrier control center 11 for processing.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.
Claims (10)
1. A DMR/PDT multi-carrier frequency base station communication system comprises at least one DMR/PDT carrier frequency base station and a plurality of terminals, wherein the terminals communicate with the DMR/PDT carrier frequency base station in a wireless link mode, the DMR/PDT carrier frequency base station comprises a carrier frequency control center, and the system is characterized in that:
setting the carrier frequency control center in a cluster working mode;
the carrier frequency control center comprises a control channel machine and at least one voice channel machine;
the control channel machine sends control signaling to the terminal within the network coverage range at a fixed frequency;
after receiving the voice, any terminal generates a call request and transmits the call request to the control channel machine, and the control channel machine sends a line establishing instruction to the corresponding voice channel machine according to the call request.
2. The DMR/PDT multi-carrier base station communication system of claim 1, wherein:
the control channel machine comprises an instruction control unit and a fixed frequency radio frequency device;
and a signal interface of the instruction control unit is electrically connected with the fixed frequency radio frequency device through a first type CAN bus.
3. The DMR/PDT multi-carrier base station communication system as claimed in claim 1 or 2, wherein:
the voice channel machine comprises a voice control unit, a low-frequency radio frequency device and a high-frequency radio frequency device;
the low-frequency interface of the voice control unit is electrically connected with the low-frequency radio frequency device;
and the high-frequency interface of the voice control unit is electrically connected with the high-frequency radio frequency device.
4. The DMR/PDT multi-carrier base station communication system of claim 1, wherein:
the carrier frequency control center comprises a control channel machine and five voice channel machines.
5. The DMR/PDT multi-carrier base station communication system of claim 1, wherein:
setting the carrier frequency control center, and converting the cluster working mode into a conventional working mode;
the carrier frequency control center comprises at least one voice channel machine;
each voice channel machine receives the call request of the terminal corresponding to the voice channel machine.
6. The DMR/PDT multi-carrier base station communication system of claim 5, wherein:
the carrier frequency control center comprises six voice channel machines.
7. The DMR/PDT multi-carrier base station communication system as claimed in claim 1 or 5, wherein:
the DMR/PDT carrier frequency base station also comprises a base station antenna;
and the base station antenna is electrically connected with the carrier frequency control center.
8. The DMR/PDT multi-carrier base station communication system as claimed in claim 1 or 5, wherein:
the DMR/PDT carrier frequency base station also comprises a key panel;
the key panel is electrically connected with the carrier frequency control center.
9. A carrier frequency base station communication method for use in the DMR/PDT multi-carrier frequency base station communication system as in any one of claims 1 to 6, comprising the steps of:
setting the carrier frequency control center in a cluster working mode:
after any terminal is in the network coverage range of the carrier frequency base station, the terminal is networked with the base station;
a control channel machine in the carrier frequency control center sends control signaling to the terminal at fixed frequency in a timing manner;
after receiving the user calling information, any terminal generates a calling request and transmits the calling request to the control channel machine;
the control channel machine judges the number of line building and the identity of the terminal according to different calling requests, and sends a line building instruction to the corresponding number of voice channel machines, and the voice channel machines and the corresponding terminals complete line building;
after the line is established, each voice channel machine receives the calling information of the terminal corresponding to the voice channel machine;
after the call is completed, the terminal sends a disconnection request to the control channel machine;
and after confirming the disconnecting request, the control channel machine sends a disconnecting instruction to the terminal, and the call is ended.
10. The carrier frequency base station communication method of claim 9, wherein:
setting the carrier frequency control center, and converting the cluster working mode into a conventional working mode;
after any terminal is in the network coverage range of the carrier frequency base station, after any terminal receives user call information, a call request is generated and transmitted to the voice channel machine;
and the voice channel machine receives the calling information corresponding to the terminal.
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| CN202010009869.8A CN111182476A (en) | 2020-01-06 | 2020-01-06 | DMR/PDT multi-carrier frequency base station communication system and carrier frequency base station communication method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112714404A (en) * | 2020-12-31 | 2021-04-27 | 哈尔滨海能达科技有限公司 | Method and device for dynamically controlling cluster terminal working mode |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103781085A (en) * | 2013-12-11 | 2014-05-07 | 北京理工大学 | Multi-frequency range TETRA digital cluster detection method and apparatus |
| CN103813285A (en) * | 2012-11-14 | 2014-05-21 | 阳光凯讯(北京)科技有限公司 | Tetra multi-carrier base station based on emergency mobile communication |
| CN105119628A (en) * | 2015-09-15 | 2015-12-02 | 福建联拓科技有限公司 | Frequency-selecting device of ARC digital intercom system |
| CN110190870A (en) * | 2019-06-14 | 2019-08-30 | 广州维德科技有限公司 | A kind of PDT multiple carrier frequency base station |
| CN110248420A (en) * | 2019-06-19 | 2019-09-17 | 广州维德科技有限公司 | A kind of cluster of base stations system and implementation method based on wireless communication protocol |
| CN110557168A (en) * | 2018-06-01 | 2019-12-10 | 成都鼎桥通信技术有限公司 | Method and device for avoiding passive intermodulation interference in dual-mode system |
-
2020
- 2020-01-06 CN CN202010009869.8A patent/CN111182476A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103813285A (en) * | 2012-11-14 | 2014-05-21 | 阳光凯讯(北京)科技有限公司 | Tetra multi-carrier base station based on emergency mobile communication |
| CN103781085A (en) * | 2013-12-11 | 2014-05-07 | 北京理工大学 | Multi-frequency range TETRA digital cluster detection method and apparatus |
| CN105119628A (en) * | 2015-09-15 | 2015-12-02 | 福建联拓科技有限公司 | Frequency-selecting device of ARC digital intercom system |
| CN110557168A (en) * | 2018-06-01 | 2019-12-10 | 成都鼎桥通信技术有限公司 | Method and device for avoiding passive intermodulation interference in dual-mode system |
| CN110190870A (en) * | 2019-06-14 | 2019-08-30 | 广州维德科技有限公司 | A kind of PDT multiple carrier frequency base station |
| CN110248420A (en) * | 2019-06-19 | 2019-09-17 | 广州维德科技有限公司 | A kind of cluster of base stations system and implementation method based on wireless communication protocol |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112714404A (en) * | 2020-12-31 | 2021-04-27 | 哈尔滨海能达科技有限公司 | Method and device for dynamically controlling cluster terminal working mode |
| CN112714404B (en) * | 2020-12-31 | 2022-04-19 | 哈尔滨海能达科技有限公司 | Method and device for dynamically controlling cluster terminal working mode |
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Application publication date: 20200519 |