GB 15160-1994 Non-central multi-channel site selection mobile communication system system
Some standard content:
National Standard of the People's Republic of China
Land mobile communication system requirements usingmulti-channel access techniques without a central controllenGB 15160-94
This standard refers to the International Radio Consultative Committee (CCIR) Volume VI Mobile Services (1990 Edition). 1 Subject content and scope of application
This standard specifies the necessary technical system requirements for the land-based multi-channel access mobile communication system. According to the characteristics of the system without central control, the main technical requirements for the system, transmitter, receiver, control unit, structure and supporting parts are specified. This standard applies to the research, production, import, use and management of the land-based multi-channel access system by relevant units. 2 Reference standards
GB3380 Ringing and signaling tones for telephone automatic switching network GB12192 Measurement methods for mobile communication FM radiotelephone transmitters GB12193 Measurement methods for mobile communication FM radiotelephone receivers 3 Terminology
3.1 Without central control Without central control A decentralized control method in which each mobile station or fixed station sets the wireless communication link separately without adopting the centralized control of the switching control center. 3.2 Multi-channel access A communication system has multiple channels (frequencies) for users to use together, and sends selective call signaling according to the called user address (number) to establish communication.
3.3 M/D/1, M/M/79
The service process of the communication system can be treated as a random service system, and can be divided into different categories according to the three components of input process, service rules and service organization. The input process is divided into Poisson input (indicated by M), fixed-length input (indicated by D), etc.; the service rules are divided into exponential distribution service (indicated by M), fixed-length service (indicated by D), etc.; the number of service agencies in the communication system is the number of channels. M/D/1 means Poisson input/fixed-length service/1 channel, and M/M/79 means Poisson input/exponential distribution/79 channels. 4 System composition
This system can be composed of user equipment such as fixed stations, vehicle-mounted stations, data transmission stations, portable stations, handheld stations, remote control stations, repeaters, wired/wireless adapters, and monitoring equipment such as radio wave monitoring systems and call sign encoders. 4.1 User equipment
Fixed stations can be used for fixed purposes;
b. The vehicle-mounted station can be used for mobile use in vehicles;
The portable station can be used by individuals on their backs;
The digital transmission station can be used for computer communication;
Approved by the State Administration of Technical Supervision on August 12, 199434
Implemented on January 1, 1995
GB 1516094
Handheld stations can be used for personal handheld mobile use; remote control stations can be used for long-distance operation;
Relay stations can forward signals from mobile stations or fixed stations to extend their communication distance; g.
h. Wired/wireless adapters can communicate with simplex access devices of wireless networks and wired networks. 4.2 Monitoring equipment
4.2.1 The radio wave monitoring system is composed of a monitoring station and a computer. It is a radio wave management system that can monitor and control the communication activities of all radio stations within its wireless coverage area; 4.2.2 Call sign encoders are devices that write the assigned radio station call sign codes into ROM boxes in accordance with national radio management regulations. 4.3 Basic structure of decentralized network (see Figure 1) Any radio station can select any location within its wireless coverage area to communicate directly with another (or a group of) radio stations, forming a fully connected network in a small area. The authorized radio station can select any location within the wireless coverage area of the repeater station to relay the communication with another (or a group of) radio stations, forming a partially connected network in a large area. Back
Monitoring system
Partially connected network of large area
Fully connected network of small community
5 System structure requirements
5.1 System technical specifications (see Table 1)
Between fixed station 1 and vehicle-mounted station 2
Forwarding Between handheld station 5 and vehicle-mounted station 2
Monitoring—
Figure 1 Basic structure of decentralized network
Fully connected network of small community
Control mode
Talk mode
Rate range
Control channel
Talk channel
Channel selection method
Carrier level detection threshold
Transmitting power
Antenna height and fixed station interval
Regional mode.km
Cell mode, km
Busy hour traffic volume of each radio station
GB15160-94
Table 1 System technical specifications
Interleaved (12.5kHz) mode
Broadband (25Hz) mode
Various radio stations are detected by carrier level and set the wireless communication link independently. Distributed control mode of single-mode push-to-talk mode
Can be 1:1
915917
903~905
430~-432
915. 012 5 MHz
903.0125MHz
430.0125 MHz
Number of channels
Signal interval
Waiting mode
915.0375~~916.9875MHz
903. 037 5~ 904. 987 5 MHz
430.0375~~431.9875MHz
M/M/157
Loss system
Number of channels
Channel spacing12.5kHz
No third-order intermodulation group method (see Appendix B)
luV (open circuit voltage)
M/M/79 Loss system
Generally 5W, of which, for the 430~432MHz frequency band, it should be <1.5WAntenna height 10. Fixed station spacing ≥200: Antenna height <3 0, ≥10, fixed station interval 500: antenna height>30, fixed station interval ≥1000: special use occasions, with the approval of the Radio Management Committee, the antenna height is allowed to be 30 radius
Talk time limit
(See Appendix C)
(Call cutoff)
Recall and reconnect
Same number broadcast
Abbreviated dialing
User telephone number
Radio call code
Non-voice service
Enter the wired network
GB 15160-
Continued Table 1
Interleaved (12.5kHz) mode
Usually automatically limited to 10 minutes;
When the call channel utilization rate is higher than 80%, it will automatically switch to a 3-minute limit; a warning tone will be issued 30 seconds before the time limit expires
Broadband (25kHz) mode
When the call channel utilization rate is higher than 75%,
It will automatically switch to a 3-minute limit; a warning tone will be issued 30 seconds before the time limit expires
Called: Ringing 450Hz, beeping 1s, stopping 4$, a total of 6 tones; Call notification: Ringback 450Hz, beeping 1$, stopping 4$, a total of 6 tones; Call failed: Busy tone 450Hz, beeping 0.35s, stopping 0.35s, total 6 beeps, reset, send out disconnection signal, both parties automatically hang up to reset, wait, the other party presses the [#] key (call re-call) or the other party presses the [#] key (answer re-call), and communication can be established on the channel and telephone number just used. When users with the same group number, group number or network number make group calls, group calls or full network calls, other users can monitor and interrupt the network. 9 frequently used telephone numbers can be stored. 10-digit user address code in decimal system, can set station number. 1 assigned by the Radio Management Committee. 1 written into the ROM box. 4 in total. 10-digit 5-digit code, can be set. 1 assigned by the Radio Management Committee. 1 written into the ROM box. 2 in total. 2 provinces (autonomous regions, municipalities directly under the central government) with English letters. ）Identification code and the following 5-digit user address code (station number), assigned by the Radio Management Committee and written into the ROM box①Short distance, the control head can be used to remotely control the transceiver via a multi-core cable②Long distance, a remote control encoder can be equipped to remotely control the radio station via a cable to the decoder①Manual forwarding
②Users of this network can adapt to the communication distance directly or forward or relay via a forwarding stationCan transmit data, fax, and still imagesCan use a wired/wireless adapter (manual, semi-automatic, automatic) to enter the wired network via the user lineWhen the key operation is valid, a confirmation operation tone can be sentWhen the function works effectively, a confirmation work tone can be sent37
Telephone number
Display and memory
Broadband and interleaved mode
GB15160-94
Continued Table 1
Interleaved (12.5kHz) mode
Broadband (25 kHz) mode
PLL unlock tone: 450Hz ring 0. 04s stop 1s Normal transmission tone: 450Hz ring 0.048 stop 2s ROM abnormal tone: 450Hz ring 0.04s stop 3s or more sound until eliminated
When turning on, the local station number is displayed and the local network number is checked. When calling, the called phone number is displayed and memorized. When being called, the main calling phone number is displayed and memorized. When unattended, the last main calling phone number is memorized. Implementation in 1996
Should be compatible and interoperable with broadband mode
Implemented on the date of release
Note: 1) 903-905MHz#900MHz public mobile communication network will be discontinued in large and medium-sized cities with conflicts by 2005, and can be used until scrapped in cities and regions without conflicts. If the frequency range is changed in the future, the regulations of the National Radio Management Committee shall prevail. 2) Standard \ A" items are non-mandatory requirements. 5.2 Wireless channel number and frequency configuration (see Figure 2) Signal invitation
Signal spacing
(Mz)
Figure 2 Wireless channel number and frequency configuration
5.3 Three bandwidth modes (see Table 2 and Figure 3) Table 2
Table of three bandwidth modes
Channel spacing, kHz
Occupied bandwidth, kHz
431.987 5
904.987 3
Maximum frequency deviation, kHz
GB15160—94
Figure 3 Amplitude-frequency diagram of three bandwidths
5.4 Connectivity reliability
When the bit error rate BER=-1×10-2, the connectivity reliability is ≥90%, see Appendix A. 5.5 Communication process (see Figure 4)
6 Main technical requirements of transmitter (see Table 3)
Table 3 Main technical requirements of transmitter
Antenna power
Rated output
Reduced output, W
Cell mode mw
Frequency tolerance 10-6
Occupied bandwidth, kHz
Maximum rated deviation, kHz
Adjacent channel interference suppression filtering
(high modulation characteristics)
Adjacent channel power ratio B
Spurious emission + W
Interleaved mode
900 MHz
E band 430MHz
80lgf/3
3kHz to 15kHz
Broadband mode
Car (ship) station
Portable station Handheld station
601gf/3
f is 3 kHz to 15 kHz
≥65(25~500 MHz)
≥60(500~1 000 MHz)
Station 1
Waiting on the control channel
Press PTT to call
Measure the amount of the basic call signal
Receive input level>threshold level?
Below threshold state>Is?
Industrial control signaling
Return to control channel to receive
Receive input level > threshold level?
Send control signaling
Receive on designated call channel
Response with same address number
【Ringback
CPress PTT to speak
Release PTT to receive
【Send control signaling
Response with same address number
Response with same address number
Return to control channel to wait
GB 15160--94
Communication flow chart
In the figure: (1) The carrier level detection threshold is set to 1μV (open circuit voltage). (2) To avoid traffic congestion, the call time limit begins. 40
Radio stations 2~N
Wait on control channel
Response with same address number
Quantity Send on designated talk channel
Send ringback signal
【Receive
Response with same address number
Press PTT to speak
Release PTT to receive
Send control signaling
Press reset button
Send disconnect control signaling
Return to wait on control channel
Key technical requirements of receiver (see Table 4)
Reference sensitivity
Bandwidth (6 dB), kHz
Selectivity (60d)kHz
Spurious response immunity, dB
Adjacent channel selectivity, dB
Intermodulation immunity, dB
Local oscillator frequency tolerance 10-
Spurious emission pW
Squelch function
Carrier level detection function
Signal utilization rate determination function
Control unit technical specifications
8.1 Control signaling (see Table 5 ）
Code type (symbol form)
Signaling transmission rate
Modulation mode
Marking frequency, Hz
Space frequency, Hz
Frequency deviation, KHz
Bit synchronization
Frame synchronization
Called address
Channel number
Signaling format
Command code
Call sign code
Identification
Hagclbargcr Code length
Total length of signaling
GB 15160-94
Table 4 Main technical requirements for receivers
Interleaving mode
Car (ship) station
Community station
Portable station
Handheld station
Large area station
Better than 20dBμV
900MHz
430MHz3
Car (ship) station||t t||Better than 6dBμV
Table 5 Control signaling
Interleaved mode
Portable station
Handheld station
Broadband mode
Allowable coding error|±200×10-
Subcarrier MSK
Allowable deviation 1±200×10-
Allowable deviation <1±200×10-
±2. 5~~±3. 5
20 bit
101010.....
±2.5～±5
111011001010000
5-bit BCD
binary
binary
2×88(data length)+12m188 bit
188+50+15 253 bit .210.8 rms41
8.2Called address code
GB 15160--94
That is, the called user's telephone number, using 20-bit BCD code to represent a decimal 5-digit number Example:
Decimal
8.3 Channel number
8-bit binary code is used to represent the decimal channel number, see Table 6 for details: Table 6 Channel number
Channel number CHn
8.4 Command code
Binary code
00000001
01010000
01010001
10011110
4-bit binary code is used to represent various commands of interleaved mode and broadband mode. Call and recall commands are sent by the control channel; answer, release key and disconnect commands are sent by the talk channel. See Table 7 for details: Table 77 Instruction code
Binary code
8.5 Call sign coding
Interleaved mode
General call in large area, answerwwW.bzxz.Net
General recall in large area, release
Enter forwarding mark
Enter wired mark
General call in large area, answer
General recall in large area, release
General disconnection in large area
General call in small area, answer
General recall in small area, release
General call in small area, answer
General recall in small area, release
General call in small area, answer
General recall in small area, release
General call in small area, answer
General recall in small area, release
General call in small area, answer
General recall in small area, release
General call in small area, answer
General recall in small area, release
General call in small area, answer
General recall in small area, release
General call in small area, answer 42
Broadband mode
General call, recall, key release, answer
Forwarding mark
Wired mark
Bit number
Call number code
8.6 Identification code
Provincial identification code
GB15160-94
Table 8·Call sign coding
F(10min)
D(3 min)
The first digit of the network number
8.6.1 Use 8-bit16-16-255 in hexadecimal code to indicate that the communicating parties are in the same group for identification when disconnecting the line. See Table 9 for details:
Hexadecimal
Decimal
Binary
00010000
11111111
8.6.2 Use 8-bit16-16-0F (i.e. 0~~15 in decimal code) in hexadecimal code to indicate the remaining communication time when the key is released. See Table 10 for details: Table 10
9 Structure, ROM box, antenna and power supply
9.1 Structure
9.1.1 The casing and ROM box structure require special tools to open and remove. Remaining time of communication, s
90~120
120~-150
150~180
180~210
210~240
240~270
270~~300
300330
330360
360-390
390-420
420~450
450-~480
9.1.2 Single chip microcomputer needs to use mask to solidify the program and solder it on the printed circuit board, or take other protective measures, so that the program cannot be rewritten. 9.2 ROM box is divided into 64bit and 256bit network types. 9.2.1 Dimensions
9.2.2 Interface (see Table 11)
Call sign code (see Table 12)
Bit number
Call sign code
1~～4
9.3 Antenna
Provincial identification code
9.3.1 Impedance
9.3.2 Interface and gain (see Table 13)
Gain (dBi)
GB 15160—94
1. 5 × 45
This hole is inserted
ROM box
Figure 5 ROM box socket
Table 11 Interface
Table 12a
37~～40
Table 12b
Call sign code
Call sign code
915~917 MHz
430-432MHz
903~905 MHz
Table 13 Interface and gain
Portable
TNC type
Note: 430~432MHz portable can use Q9 type. 9.4 Power supply
9.4.1 Vehicle-mounted station, portable station (see Table 14) DC voltage: 13.8V ± 10%
Vehicle-mounted type
85~104
4105~128129~256
37~~40
10 min
Fixed type
Current consumption
Handheld station (see Table 15)
DC voltage: 7.2V
Current consumption
9.4.3 Fixed type
AC input voltage
GB15160-94
Table 14 Vehicle-mounted station, portable station
Transmitter (5W)
5 Handheld station
Transmitter (5W)
<900mA
220V±10%
13.8V±10%
DC output voltage
50V·A
<800mA
<200mA
3A (with 15.5V overvoltage protection)
<600mA2 Interface (see Table 11)
Call sign code (see Table 12)
Bit number
Call sign code
1~～4
9.3 Antenna
Provincial identification code
9.3.1 Impedance
9.3.2 Interface and gain (see Table 13)
Gain (dBi)
GB 15160—94
1. 5 × 45
This hole is inserted
ROM box
Figure 5 ROM box socket
Table 11 Interface
Table 12a
37~～40
Table 12b
Call sign code
Call sign code
915~917 MHz
430-432MHz
903~905 MHz
Table 13 Interface and gain
Portable
TNC type
Note: 430~432MHz portable can use Q9 type. 9.4 Power supply
9.4.1 Vehicle-mounted station, portable station (see Table 14) DC voltage: 13.8V ± 10%
Vehicle-mounted type
85~104
4105~128129~256
37~~40
10 min
Fixed
Current consumption
Handheld station (see Table 15)
DC voltage: 7.2V
Current consumption
9.4.3 Fixed
AC input voltage
GB15160-94
Table 14 Vehicle-mounted station, portable station
Transmitter (5W)
5 Handheld station
Transmitter (5W)
<900mA
220V±10%
13.8V±10%
DC output voltage
50V·A
<800mA
<200mA
3A (with 15.5V overvoltage protection)
<600mA2 Interface (see Table 11)
Call sign code (see Table 12)
Bit number
Call sign code
1~～4
9.3 Antenna
Provincial identification code
9.3.1 Impedance
9.3.2 Interface and gain (see Table 13)
Gain (dBi)
GB 15160—94
1. 5 × 45
This hole is inserted
ROM box
Figure 5 ROM box socket
Table 11 Interface
Table 12a
37~～40
Table 12b
Call sign code
Call sign code
915~917 MHz
430-432MHz
903~905 MHz
Table 13 Interface and gain
Portable
TNC type
Note: 430~432MHz portable can use Q9 type. 9.4 Power supply
9.4.1 Vehicle-mounted station, portable station (see Table 14) DC voltage: 13.8V ± 10%
Vehicle-mounted type
85~104
4105~128129~256
37~~40
10 min
Fixed
Current consumption
Handheld station (see Table 15)
DC voltage: 7.2V
Current consumption
9.4.3 Fixed
AC input voltage
GB15160-94
Table 14 Vehicle-mounted station, portable station
Transmitter (5W)
5 Handheld station
Transmitter (5W)
<900mA
220V±10%
13.8V±10%
DC output voltage
50V·A
<800mA
<200mA
3A (with 15.5V overvoltage protection)
<600mA
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