CN113225687B - Intelligent calling system and method based on DMR and Bluetooth in indoor environment - Google Patents

Intelligent calling system and method based on DMR and Bluetooth in indoor environment Download PDF

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CN113225687B
CN113225687B CN202110343556.0A CN202110343556A CN113225687B CN 113225687 B CN113225687 B CN 113225687B CN 202110343556 A CN202110343556 A CN 202110343556A CN 113225687 B CN113225687 B CN 113225687B
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dmr
information
bluetooth
data packet
cell
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CN113225687A (en
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虞凯
陈昳
杨捷
谢联莲
段永奇
易立富
王学林
熊洁
高柏松
韦道准
苏恺
刘孜学
王富斌
王梓丞
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China Railway Eryuan Engineering Group Co Ltd CREEC
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China Railway Eryuan Engineering Group Co Ltd CREEC
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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
    • H04W4/02—Services making use of location information
    • H04W4/029—Location-based management or tracking services
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/14—Determining absolute distances from a plurality of spaced points of known location
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H04W28/065—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information using assembly or disassembly of packets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/33—Services specially adapted for particular environments, situations or purposes for indoor environments, e.g. buildings
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses an intelligent calling system and a calling method based on DMR and Bluetooth in an indoor environment, belonging to the technical field of wireless communication. The system comprises a visual terminal, a dispatching desk, an application server, a DMR central controller, a DMR base station, a DMR handheld terminal with a Bluetooth module and a Bluetooth beacon transmitting module, wherein the Bluetooth beacon transmitting module is arranged at a preset position and periodically transmits a data packet with position information; the DMR handheld terminal with the Bluetooth module is used for receiving a data packet in real time, superimposing own ID information on position information to form a position data packet with the ID information, uploading the position data packet with the ID information to the DMR base station, the application server updates the grouping information of the DMR handheld terminal with the Bluetooth module in real time according to the position data packet with the ID information, and the dispatching desk is used for calling the DMR handheld terminal with the Bluetooth module in a selected grouping according to the grouping information, so that the dispatching efficiency is improved.

Description

Intelligent calling system and method based on DMR and Bluetooth in indoor environment
Technical Field
The invention belongs to the technical field of wireless communication, and particularly relates to an intelligent calling system and method based on DMR and Bluetooth in an indoor environment.
Background
DMR narrowband communication systems have evolved from analog to digital, having been in commercial history for decades. The method is widely applied to the professional communication fields of railways, public security, forestry, earthquake relief and the like. The DMR wireless communication system has the characteristics of no need of answering, good call timeliness, one-for-one correspondence, wide single station coverage range, strong disaster tolerance and the like, and gradually replaces an analog interphone to serve communication operation of various industries.
The technical principle of the Bluetooth indoor positioning is based on a path loss model, and the distance between a Bluetooth transmitting point and a receiving station is obtained by an empirical formula according to the received signal intensity of the Bluetooth. The maximum advantages of the Bluetooth indoor positioning technology are that the equipment is small in size, short in distance and low in power consumption, and the Bluetooth positioning mode adopting signal intensity indication is not influenced by the line of sight.
The DMR has a working frequency range of 403 MHz-423.5 MHz, adopts a TDMA multiplexing mode and a 4FSK modulation mode, has a channel interval of 12.5kHz, can support 2 synchronous or independent calls by a single 12.5kHz channel, and has a frequency utilization rate improved by 1 time compared with that of the traditional analog system. Each DMR handheld terminal has a user number belonging to the DMR handheld terminal, and a central dispatcher can communicate with the terminal in a user dialing mode. However, in an indoor space with wide occupied area, multiple service types and complex operating personnel, central scheduling personnel cannot know the position information of each operating personnel on site at the first time, cannot directly schedule the personnel in a certain operating area, and can determine the position of the personnel only by calling the operating personnel on site so as to command the operating personnel in a designated area, and the scheduling efficiency is low under the emergency condition.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, a DMR communication mode occupies a large area, has multiple service types and is used for solving the problem that in an indoor space with complex operating personnel, a central dispatcher cannot know the position information of each operating personnel on site at the first time and cannot directly dispatch the personnel in a certain operating area.
In order to achieve the above purpose, the invention provides the following technical scheme:
an intelligent calling system based on DMR and Bluetooth in indoor environment comprises a visual terminal, a dispatching desk, an application server, a DMR central controller, a DMR base station, a DMR handheld terminal with a Bluetooth module and a Bluetooth beacon transmitting module,
the Bluetooth beacon transmitting module is arranged at a preset position and periodically transmits a data packet with position information;
the DMR handheld terminal with the Bluetooth module is used for receiving a data packet in real time, superimposing the position information on the ID information of the DMR handheld terminal to form a position data packet with the ID information, and uploading the position data packet with the ID information to a DMR base station;
the DMR base station sends the acquired position data packets with the ID information to an application server through a DMR central controller;
the application server updates the grouping information of the DMR handheld terminal with the Bluetooth module in real time according to the acquired position data packet with the ID information;
the visual terminal displays the position of the DMR handheld terminal with the Bluetooth module in real time according to the position data packet with the ID information;
and the dispatching desk is used for calling the DMR handheld terminal with the Bluetooth module in the selected group according to the group information.
As a preferable aspect of the present invention, the range of the positioning of the bluetooth beacon transmission module is less than or equal to 5 meters.
As a preferred scheme of the present invention, the packet information of the DMR handheld terminal with the bluetooth module is stored in the form of a call table, the field of the call table includes a location-marked cell, a call cell, a group ID number, and a user in the group, one or more call cells are set in the location cell, each call cell sets a bluetooth beacon transmitting module, the user in the group stores the ID number of the DMR handheld terminal with the bluetooth module in the call cell, and the application server searches the location cell, the call cell, and the group ID number where the DMR handheld terminal with the bluetooth module corresponding to the location data packet with the ID information is located according to the call table.
As a preferred scheme of the present invention, the location information in the location data packet with ID information is an ID number of the bluetooth beacon transmitting module, and the ID number of the bluetooth beacon transmitting module is in a one-to-one correspondence with the calling cell. And the application server reads the ID number of the corresponding Bluetooth beacon transmitting module from the acquired position data packet with the ID information, so that the position cell, the calling cell and the group ID number of the corresponding DMR handheld terminal with the Bluetooth module are determined.
As a preferred scheme of the present invention, the application server stores a location cell list, the location cell list includes fields with ID numbers of a location cell, a calling cell and a bluetooth beacon transmitting module, and the location cell and the calling cell where the DMR handheld terminal with a bluetooth module transmitting a location data packet with ID information is located are obtained through the location cell list.
As a preferred scheme of the invention, the DMR hand-held terminal with the Bluetooth module comprises a DMR chip and the Bluetooth module,
the Bluetooth module receives the data packet with the position information output by the Bluetooth beacon transmitting module and outputs the data packet with the position information to the DMR chip through the IO port,
the DMR chip superposes the data packet with the position information with the self ID data to form a position data packet with the ID information, and uploads the position data packet with the ID information to the DMR base station.
Based on the same conception, the invention also provides an intelligent calling method based on DMR and Bluetooth in the indoor environment, which comprises the following steps:
s1, establishing an indoor environment of the intelligent calling system based on DMR and Bluetooth as the claim 1-6;
s2, the DMR hand-held terminal with the Bluetooth module receives the data packet with the position information sent by the Bluetooth beacon transmitting module; the position information is superposed with the ID information of the position information to form a position data packet with the ID information, and the position data packet with the ID information is uploaded to a DMR base station;
s3, the DMR base station sends the acquired position data packets with the ID information to an application server through a DMR central controller;
s4, the application server updates the grouping information of the DMR handheld terminal with the Bluetooth module in real time according to the acquired position data packet with the ID information; the visual terminal displays the position of the DMR handheld terminal with the Bluetooth module in real time according to the position data packet with the ID information;
s5, the dispatching desk sends voice information to the selected position area, the application server finds the corresponding group according to the selected position area, and sends the voice information to the DMR handheld terminal with the Bluetooth module in the group.
As a preferable embodiment of the present invention, step S2 specifically includes the following steps:
s21, a Bluetooth module in the DMR handheld terminal with the Bluetooth module receives a data packet with position information sent by a Bluetooth beacon transmitting module;
s22, the Bluetooth module outputs the received data packet with the position information to a DMR chip in the DMR handheld terminal with the Bluetooth module through an IO port;
s23, the DMR chip superimposes the position information on the ID information of the DMR chip to form a position data packet with the ID information;
and S24, the DMR chip compresses the position data packet with the ID information into a sub-packet of a DMR data format and uploads the sub-packet to the DMR base station.
Compared with the prior art, the invention has the beneficial effects that:
1. by adopting the traditional DMR communication system, a user needs to communicate in a dialing mode, if a worker in a certain area needs to be called, the user needs to know the current worker in the area, and then the user can communicate by dialing the handheld terminal number of the corresponding worker. The invention combines the DMR and the Bluetooth technology, a calling list is preset in a server, the intelligent calling based on the position of the indoor environment can be realized, according to a pre-formed indoor gridding map, when the communication is needed to be carried out with the working personnel of a certain position cell, the calling can be carried out only by selecting the name of the position cell, and the central dispatcher can know the position information of each working personnel on site at the first time and directly communicate with the personnel of a certain working area.
2. The method comprises the steps that a position cell list and a call list are preset in an application server, the corresponding relation between each area of the cell and a Bluetooth beacon transmitting module is established, DMR communication terminals in the same area are grouped, the grouping condition is updated in real time according to the position change of the DMR communication terminals, and central scheduling personnel can send voice instructions to the corresponding DMR communication terminals directly according to position information.
Description of the drawings:
fig. 1 is a system architecture diagram of an intelligent call system based on DMR and bluetooth in an indoor environment in embodiment 1 of the present invention;
fig. 2 is a working schematic diagram of uploading location information by a DMR handheld terminal with a bluetooth module in embodiment 1 of the present invention;
fig. 3 is a passenger station calling cell map in embodiment 2 of the present invention.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
Example 1
An intelligent calling system based on DMR and Bluetooth in an indoor environment comprises a DMR wireless communication system and a Bluetooth beacon transmitting module. The DMR wireless communication system comprises a DMR base station and a DMR handheld terminal with a Bluetooth module, wherein the DMR base station is arranged in an indoor space, the DMR base station is arranged in the indoor space and covered by an antenna, the coverage range of a single DMR base station in an open area can reach 2km, the indoor environment is slightly complex, but the indoor distance is limited, indoor wireless coverage can be completed through one or more DMR base stations, and a user can talk through the DMR handheld terminal in the indoor space.
And a Bluetooth beacon transmitting module is arranged at an indoor position to be positioned. Each beacon has a separate ID, bound to a specific location in the system. The bluetooth beacon transmitting module broadcasts a bluetooth data packet by radio at regular intervals, wherein the data packet contains no information except the beacon ID, can be the geographic coordinates (such as longitude and latitude) of the current position, and can also be any other information. The wireless terminal supporting the Bluetooth can receive the information, the information is used for completing positioning, the positioning accuracy is closely related to the laying density and the transmitting power of the Bluetooth beacons, and the positioning accuracy of the radius of 5m of the installation position of the Bluetooth beacon can be generally realized.
The DMR handheld terminal with the Bluetooth module is additionally provided with the Bluetooth communication module on the basis of the original DMR handheld station, the original DMR handheld station at least comprises two paths of communication channels, one path of communication channel is used for communication, and the other path of communication channel is used for uploading position information of the DMR handheld station to a DMR central controller of a DMR wireless communication system. The DMR handheld terminal with the Bluetooth module can obtain the self positioning information according to the relative position relation with the Bluetooth beacon transmitting module.
The system architecture of an intelligent call system based on DMR and bluetooth in an indoor environment is shown in fig. 1. The Bluetooth beacon transmitting module sends out data packets containing position information (such as geographic coordinates) at regular time, the DMR handheld terminal with the Bluetooth module acquires the position information after receiving the data packets sent out by the nearest Bluetooth beacon transmitting module, after the position information is superposed with the ID data of the base station, the position information with the ID data is uploaded to a DMR base station through a DMR communication channel, the DMR base station is used for acquiring the position information with the ID data of a plurality of DMR handheld terminals in the coverage area of the DMR base station, and the position information of each ID data is forwarded to the DMR central controller, the application server displays the position information of the ID data acquired by the DMR central controller on a visual terminal, and the staff of the dispatching desk can display the position information of the ID data on the DMR central controller, and respectively sending voice instructions to the DMR handheld terminals with the Bluetooth modules through the application server and the DMR central controller. And after acquiring the output voice back instruction from the DMR central controller, the DMR base station distributes the voice back instruction to each DMR handheld terminal with the Bluetooth module through a wireless network.
As a preferred scheme, the working principle of uploading the position information by the DMR handheld terminal with the bluetooth module is shown in fig. 2. Receiving a data packet of an indoor Bluetooth beacon, and information such as an ID (identity), a geographic coordinate, Bluetooth signal intensity and the like of each Bluetooth beacon by a Bluetooth module of a DMR handheld terminal; the Bluetooth module transmits the received information to a DMR handheld terminal main chip; and thirdly, the master chip superposes the information of the Bluetooth module with the ID information of the handheld terminal and the like, compresses the information into a DMR data format, subpackages the information to the DMR base station, and forwards the information to the DMR central controller, and the DMR central controller processes the received information.
Example 2
As a preferred scheme, the indoor environment can be divided, and the bluetooth beacon transmitting module is installed according to the divided region, so that the ID information of the bluetooth beacon transmitting module corresponds to each block, and after the dispatching desk receives the ID information of the bluetooth beacon transmitting module, the corresponding position information can be directly obtained. In the concrete implementation steps, the preset steps are as follows:
(1) dividing an indoor map into different position cells which are not overlapped with each other according to requirements of operation functions, operation area division and the like, establishing a position cell list, and storing the position cell list by an application server, wherein a passenger station calling cell map is shown in figure 3;
(2) each position cell is provided with a Bluetooth beacon transmitting module, and if the range of the divided position cells exceeds the coverage range of the Bluetooth beacon, the mode of arranging a plurality of Bluetooth beacons is adopted to realize the full coverage of the Bluetooth signals in each position cell;
(3) each Bluetooth beacon has an independent ID and is bound with the name of the location cell, when a plurality of Bluetooth beacons exist in one location cell, all the Bluetooth beacons are bound with the name of the location cell, and corresponding Bluetooth ID information is stored in a location cell list.
In addition, in order to implement a positioning call, a calling cell needs to be set, that is to say:
(1) each position cell is provided with a calling cell;
(2) each calling cell is provided with a fixed calling ID number, and the calling ID numbers correspond to the calling cells and the position cells one by one;
(3) the application server establishes a call table and stores the call ID number, the call cell and the location cell name.
One specific call list setup is shown in table 1.
Table 1 call list setup
Label number Location cell Calling cell Group ID number Users in group
B1 Security inspection port C1 D1 Terminal L1, terminal L2, terminal L3, and terminal L4
B2 Security inspection port C1 D1 Terminal L1, terminal L2, terminal L3, and terminal L4
B3 Ticket checking port 1 C2 D2 Terminal L5, terminal L6, terminal L7
B4 Ticket checking port 2 C3 D3 Terminal L8
…… …… …… …… ……
B n-1 Service desk C n-1 D n-1 Terminal L n-2 、L n-1
Bn Standing hall Cn Dn Terminal Ln
The process of uploading the position information comprises the following steps:
(1) indoor operating personnel are provided with a DMR handheld terminal with a Bluetooth module;
(2) when a worker enters a certain position cell, the carried handheld terminal scans the Bluetooth beacon information sent by the corresponding Bluetooth beacon transmitting module to obtain Bluetooth ID information and corresponding position information;
(3) the DMR handheld terminal with the Bluetooth module automatically reports Bluetooth ID information to a center through a data dedicated channel;
(4) the application server receives the Bluetooth ID information reported by the DMR handheld terminal, obtains the name of the position cell through the position cell table, and analyzes the indoor position of the DMR handheld terminal.
When DMR holds terminal L n-1 From calling cell C n-1 Move to calling cell C n The center moves the terminal L according to the DMR n-1 Location information reported, will L n Moving out of calling cell C n-1 And joined to calling cell C n Group D n The call table update is shown in table 2.
Table 2 call list setup
Label number Location cell Calling cell Group ID number Users in group
B1 Security inspection port C1 D1 Terminal L1, terminal L2, terminal L3, and terminal L4
B2 Security inspection port C1 D1 Terminal L1, terminal L2, terminal L3, and terminal L4
B3 Ticket checking port 1 C2 D2 Terminal L5, terminal L6, and terminal L7
B4 Ticket checking port 2 C3 D3 Terminal L8
…… …… …… …… ……
B n-1 Service desk C n-1 D n-1 Terminal L n-2
Bn Standing hall Cn Dn Terminal L n-1 Terminal Ln
When the staff or central dispatcher in the station needs to communicate with the passenger transport staff in a certain position cell, the terminal (fixed terminal or mobile terminal) directly selects the name of the position cell to initiate a call on the operation interface, and the central server is automatically connected to all the mobile terminals in the position cell through a call list to establish a call link, thereby realizing the group call.
The execution sequence of the above steps is one embodiment of the method of the present invention, and is not limited to be executed in this order, but the execution sequence is changed based on the method idea of the present invention, and the protection scope of the present invention is also included.

Claims (7)

1. An intelligent calling system based on DMR and Bluetooth in indoor environment comprises a visual terminal, a dispatching desk, an application server, a DMR central controller and a DMR base station, and is characterized by also comprising a DMR handheld terminal with a Bluetooth module and a Bluetooth beacon transmitting module,
the Bluetooth beacon transmitting module is arranged at a preset position and periodically transmits a data packet with position information;
the DMR handheld terminal with the Bluetooth module is used for receiving the data packet in real time, superimposing the position information on the ID information of the DMR handheld terminal to form a position data packet with the ID information, and uploading the position data packet with the ID information to the DMR base station;
the DMR base station sends the acquired position data packets with the ID information to an application server through the DMR central controller;
the application server updates the grouping information of the DMR handheld terminal with the Bluetooth module in real time according to the acquired position data packet with the ID information;
the visual terminal displays the position of the DMR handheld terminal with the Bluetooth module in real time according to the position data packet with the ID information;
the dispatching desk is used for calling the DMR handheld terminal with the Bluetooth module in the selected grouping according to the grouping information;
the packet information of the DMR handheld terminal with the Bluetooth module is stored in a calling list form, fields of the calling list include a position marking cell, a calling cell, a group ID number and users in a group, one or more calling cells are arranged in the position cell, each calling cell is provided with a Bluetooth beacon transmitting module, the users in the group store the ID numbers of the DMR handheld terminals with the Bluetooth module in the calling cell, and the application server searches the position cell, the calling cell and the group ID number where the DMR handheld terminal with the Bluetooth module corresponding to the position data packet with the ID information is located according to the calling list.
2. The DMR and bluetooth based intelligent paging system in an indoor environment as claimed in claim 1, wherein the range of the location of the bluetooth beacon transmitting module is less than or equal to 5 meters.
3. The intelligent call system based on DMR and bluetooth in an indoor environment as claimed in claim 1, wherein the location information in the location data packet with ID information is an ID number of the bluetooth beacon transmitting module, and the ID number of the bluetooth beacon transmitting module is in a one-to-one correspondence relationship with the call cell;
and the application server reads the ID number of the corresponding Bluetooth beacon transmitting module from the acquired position data packet with the ID information, so that the position cell, the calling cell and the group ID number of the corresponding DMR handheld terminal with the Bluetooth module are determined.
4. The intelligent call system based on DMR and bluetooth in indoor environment as claimed in claim 3, wherein said application server stores a location cell table, said location cell table includes fields of ID numbers of a location cell, a calling cell and a bluetooth beacon transmitting module, and a location cell and a calling cell where the DMR handheld terminal with bluetooth module transmitting a location data packet with ID information is located are obtained from said location cell table.
5. The intelligent call system based on DMR and Bluetooth for indoor environment as claimed in any one of claims 1-4, wherein said DMR hand-held terminal with Bluetooth module comprises DMR chip and Bluetooth module,
the Bluetooth module receives the data packet with the position information output by the Bluetooth beacon transmitting module and outputs the data packet with the position information to the DMR chip through an IO port,
and the DMR chip superposes the data packet with the position information with self ID data to form a position data packet with ID information, and uploads the position data packet with the ID information to the DMR base station.
6. An intelligent calling method based on DMR and Bluetooth in indoor environment is characterized by comprising the following steps:
s1, establishing an indoor environment intelligent calling system based on DMR and Bluetooth according to the claims 1-5;
s2, the DMR hand-held terminal with the Bluetooth module receives the data packet with the position information sent by the Bluetooth beacon transmitting module; the position information is superposed with the ID information of the position information to form a position data packet with the ID information, and the position data packet with the ID information is uploaded to the DMR base station;
s3, the DMR base station sends the acquired position data packets with the ID information to an application server through the DMR central controller;
s4, the application server updates the grouping information of the DMR handheld terminal with the Bluetooth module in real time according to the acquired position data packet with the ID information; the visual terminal displays the position of the DMR handheld terminal with the Bluetooth module in real time according to the position data packet with the ID information;
and S5, the dispatching desk sends voice information to the selected position area, the application server searches the corresponding group according to the selected position area and sends the voice information to the DMR handheld terminal with the Bluetooth module in the group.
7. The intelligent calling method based on DMR and bluetooth for indoor environment of claim 6, wherein step S2 specifically includes the following steps:
s21, the Bluetooth module in the DMR hand-held terminal with the Bluetooth module receives the data packet with the position information sent by the Bluetooth beacon transmitting module;
s22, the Bluetooth module outputs the received data packet with the position information to a DMR chip in the DMR handheld terminal with the Bluetooth module through an IO port;
s23, the DMR chip superimposes the position information on the ID information of the DMR chip to form a position data packet with the ID information;
and S24, the DMR chip compresses the position data packet with the ID information into a sub-packet in a DMR data format and uploads the sub-packet to the DMR base station.
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