1. Industry background
Auxiliary police personnel refer to non-people's police personnel who assist in law enforcement by local people's governments at or above the county level or public security organs in accordance with the development of the social security situation and the actual needs of public security work. The relevant funds are included in the financial budget at the same level for guarantee. They are managed in accordance with the " Public Security Ordinance for People's Police in Public Security Organs ", and are directed and managed by the public security organs, and provide auxiliary support for the daily operation of public security organs and police activities.
2. Industry status quo
Auxiliary police personnel's work responsibilities: assist public security personnel in law enforcement, maintaining public safety, public security patrol inspection, maintaining traffic accident site order, community management, auxiliary police activities confirmed by public security organs, etc. The nature of the work and communication equipment are between the current security guards and regular police officers, and play an important role in assisting public security police officers in maintaining social security, cracking down on illegal and criminal activities, carrying out administrative management and serving the people.
2.1 Currently, communication equipment situation
The daily communication system of auxiliary police can be summarized into three categories, namely: ordinary telephone, digital cluster, and analog cluster. These three types of communication systems have alleviated the daily communication needs of auxiliary police to a certain extent, but they have brought many disadvantages in terms of "emergency speed", "cost spending", and "function expansion".
2.1.1 Ordinary phone
cannot form cluster communication, and can only call one-to-one, call response speed is slow, the unit cannot be equipped with unified equipment and dedicated telephone cards, and the auxiliary police work and use frequency is not high.
2.2.2 Digital Cluster
Digital Cluster Intercom requires building a base station to achieve interconnection. The cost of building and the sales price of terminal machines is high, and there are many auxiliary police officers in the city, which is not the best choice in cost control.
2.2.3 Simulation cluster
Some areas use simulated cluster communication systems for auxiliary police use, but simulated clusters require self-built relay stations. The system is subject to the number of relay stations, blocked by building blocks, and the coverage is limited, and it cannot be intercom in suburban counties and remote areas. It is not the best communication method for auxiliary police personnel with extremely mobile mobility.
From the above situation, it can be seen that ordinary phones are slow to respond and lack cluster scheduling capabilities; the construction cost of digital clusters is high, and the proportion of auxiliary police personnel cannot meet their conditions; the communication distance of simulated clusters is limited, and the quality of calls from longer distances is poor. From the above situation, the above three communication methods are not applicable to auxiliary police personnel.
3. Introduction to the pain point analysis function
Now auxiliary police personnel are increasingly complex in handling police incidents, and the requirements for communication systems are getting higher and higher. They must not only meet the daily communication business needs, but also establish a command, dispatch, and dispatch system. In the analysis of the responsibilities and communication status of auxiliary police, the auxiliary police group has the following pain points:
3.1 communication is difficult
Public security does not uniformly allocate communication equipment to auxiliary police personnel, the daily communication between auxiliary police personnel uses ordinary telephones, and cannot be unified in communication and command and dispatch; equipped with digital intercom , the cost of building and the sales price of terminal machines is high, and it cannot be configured one-to-one; equipped with simulated clusters, in case of emergencies and cooperation between multiple police types, it is impossible to conduct cross-domain unified calls and command and dispatch with the police.
3.2 Management difficulty
From the responsibilities, we can see that the nature of the work of auxiliary police personnel is relatively special and the group, so the work mobility is relatively high. In order to ensure the normal and orderly development of auxiliary police work, an effective management system is needed to standardize the daily work of auxiliary police. For example, patrolling auxiliary police officers, police personnel need to communicate with auxiliary police personnel for command and dispatch, and also supervise whether auxiliary police personnel patrol according to the established route and whether they have arrived at designated locations on time.
3.3 Data difficulty
According to the duties of auxiliary police, especially the auxiliary police, they have multimedia data sharing and reporting requirements in their work. For example, police information reporting may be used to report videos, and there are also applications such as recording, image evidence collection, positioning, tracking, and patrol task reporting. These requirements reflect the data difficulty problems of auxiliary police at this stage.
4. Customers need
The wireless communication system of auxiliary police is to meet the voice, data and video communication needs of auxiliary police when performing tasks such as daily patrols, maintaining traffic order, population information collection, fire rescue, maintaining social security, maintaining social order, public security inspection, and stopping illegal and criminal acts; on the other hand, it is also necessary to facilitate the public security organs to conduct unified command and dispatch of auxiliary police, check the personnel positioning and patrol trajectory of auxiliary police in real time, manage their work at the attendance management, record the communication process of auxiliary police, facilitate later query and playback, and conduct network management of the communication system. In addition, when the auxiliary police encounters emergencies during duty, they still need to communicate with the public security police. Therefore, the wireless communication system used by the auxiliary police must be able to interconnect with the public security communication system, and be able to take necessary measures to ensure the security of the public security communication network in accordance with the requirements of relevant regulations.
4.1 Communication Requirements
4.1.1 Voice Communication
Voice Calls include: cluster intercom and IP Calls. Cluster intercom is a cluster communication system implemented using various wireless network access technologies, which can realize flexible intercom within a larger range of mobile communication network coverage. It has the characteristics of: one call and hundreds of responses, cross-regional linkage, speech permissions, large user capacity in the group, and group calls. Suitable for work scenarios with on-site command and on-site coordination. Functions include: single call, group call, group call, group call nesting, broadcast, call reminder, final group, monitoring, shake death, etc. IP calls are based on duplex communication implemented by mobile networks, including one-to-one and one-to-many calls.
4.1.2 Video communication
In an emergency, the police officer can send on-site videos or pictures to the command center so that the leaders of the command stand can grasp the on-site situation and accurately mobilize the number of police officers and allocate equipment; when handling on-site events, the auxiliary police can shoot and record the entire process of the incident and send it to the server for evidence collection. Video functions include: video calls, video calls, video surveillance, video upload, picture sending, video collection, video distribution, etc.
4.1.3 Auxiliary communication
In addition to voice communication and video communication, when encountering special circumstances, auxiliary police can also contact police officers through text messages and quick help alarm buttons.
4.2 Management requirements
4.2.1 Personnel positioning
There is a GPS\Beidou positioning module on the communication terminal, which can update the location information in real time and send it to the server. On the dispatching station, you can intuitively see the real-time location of the police officer and accurately check the historical trajectory of the police officer, making it convenient to view the police officer's patrol situation. When encountering an emergency, can also establish a temporary group based on the location selection to arrange nearby police support for the surrounding police.
4.2.2 Patrol attendance
Patrol is the daily work of auxiliary police personnel and an important way for regular police to inspect auxiliary police. The patrol plan consists of auxiliary police, patrol routes and patrol time. The auxiliary police will patrol the patrol point at the arranged patrol time according to the prescribed patrol route. After performing patrol tasks, the backend can query the patrol situation of each auxiliary police officer, realize data management, and intuitively see the attendance status of the auxiliary police officers, providing strong guarantees for the command center to realize digital management .
4.2.3 Command and dispatch
In order to meet the requirements of public security police for auxiliary police dispatching and command of auxiliary police and visual management of , the command and dispatch platform has functions such as voice, video, map applications, patrol check-in, SOS alarms, etc. In an emergency, the command and dispatch platform can easily and quickly call the auxiliary police forces to achieve mutual assistance.
4.2.4 Data record
Auxiliary police personnel and dispatcher intercom, positioning, pictures, videos, patrol check-in records will be collected and stored, and can be played back and inquired afterwards, and used as analysis and evidence collection.
4.3 Public private network intercommunication requirements
If the police already had a narrowband communication system in the early stage, the Poc intercom and PDT can also be communicated through the gateway through the gateway, as a supplement to the limited coverage of the narrowband network.
4.4 System security requirements
The Ministry of Public Security attaches great importance to communication security. The system uses RSA/AES: international standard encryption algorithm and SM2/SM4: the domestic password algorithm formulated by the State Cryptography Administration.
4.5 Confidentiality Requirements
Auxiliary Police Communication has different confidentiality levels for confidentiality. For this reason, three server deployment methods are provided: the first is to use a public system server and sign an confidentiality agreement with the user to ensure that data is not leaked; the second is to independently build a rental model, and the user's intercom, positioning, recording, and video file data are stored on the server designated by the customer, but the management permissions are in the public server; the third is to independently build a one-time buyout model, which is completely independent and has the highest confidentiality level.
5. Overview of construction plan
5.1 Construction principles
Practicality
Products with market development experience, mature and stable system, and cost-effective products, the system is safe and reliable, and has strong stability. The system has multiple network access capabilities such as 4G public network and Wifi to ensure smooth communication.
compatibility
conforms to the mainstream access standards in the market, integrates a variety of communication means and existing communication preparations, and the system can be upgraded online to adapt to the development needs of the industry.
Open
meets the needs of professional users, and the system is compatible with a variety of communication devices and multi-brand communication terminals. The built communication system can integrate third-party business functions, such as supporting secondary development, and secondary development is provided through the SDK through the API interface.
Extensibility
system construction can flexibly configure and expand the system scale and functions at different stages, and have the ability to continuously absorb new technologies, which facilitates the future transformation, expansion and upgrading of the system.
economic
construction system needs to rely on the existing operator communication system network, and there is no need to build a relay station system, pay the construction fees and computer room rent of the relay system, and there is no need to go to the uncommitted commission to apply for frequency application fees.
5.2 Overview of SMART-PTT Cluster System
Voice intercom service is the most widely used communication scheduling tool in cluster communication. It generally needs to be implemented within a certain coverage through specially planned wireless communication frequency and dedicated intercom bearer tools, and has the characteristics of specialization and regionality. The SMART-PTT cluster system implemented using various wireless access technologies (GPRS/CDMA 1x/EVDO/WCDMA/LTE/WiFi) reflects the difference from the above-mentioned traditional walkie-talkies, and can realize flexible intercom within a larger range of mobile communication network coverage, which is an extension and supplement to the functions of traditional cluster communication products.
SMART-PTT cluster system provides different types of solutions such as voice intercom, personnel positioning, video communication, picture information, short messages, patrol attendance, etc. The management platform is a B/S architecture model, supports two login methods: web pages and APPs, and can create different access and operation permission accounts and perform flexible scheduling and management. It supports access to multiple network modes, realizes the integration of multiple terminals such as walkie-talkies, law enforcement instruments, mobile phones, cameras, and multiple terminals with computer terminals and platforms. It is suitable for multi-level visual command and dispatch system, and can meet daily and emergency command and dispatch needs at the same time.
SMMART-PTT cluster system is flexiblely deployed, has powerful functions, is safe and reliable, and is simple to operate. It can collect, upload and store a variety of data such as voice, video, positioning, user information in real time. It can query, playback, download and statistical analysis of data records on the platform, computer, device, etc., providing powerful data management support for command and dispatch and improving scheduling efficiency.
5.3 Solution Advantages
5.3.1 Business Model
Adhering to the business model of openness, cooperation, competition and win-win, self-innovation to promote market development, and develop products in line with market needs.
5.3.2 After-sales guarantee
provides customers with 7*24 hours after-sales service, professional technical support, and one-stop solution to make customers feel at ease.
5.3.3 Multi-category terminal
has been adapted to 80% of domestic professional brand terminals, and more than 20 terminal categories, which can realize multi-scenario, multi-category, and multi-brand integrated communication.
5.3.4 coverage wide area
fully relies on leveraging the wide coverage, high bandwidth and mobility of the operator's wireless broadband network, and solves the problems of communication distance, user capacity and dedicated frequency, and can achieve flexible intercom on a larger range of mobile network coverage.
5.4 technology to realize
5.4.1 architecture
SMART-PTT cluster system mainly includes four parts:
l exchange server
l system management platform
l client software
l database system
5.4.2 The switching server of the switching server
SMART-PTT cluster system is the main part of the system, responsible for user authentication, group management, online status, conversation control, voice switching and other functions; the switching server supports distributed architecture, multi-center parallel processing, and increases the user's concurrency capacity by increasing the switching server nodes.
5.4.3 System Management Platform
SMART-PTT cluster system management platform is accessed and managed in WEB mode. Its functions mainly include: user management, group management, recording management, multimedia management, positioning management, system settings, etc. Provide a unified call access system application interface, simplify user network management, greatly improve the efficiency of secondary development applications, and facilitate integration of other systems.
5.5 Networking Solution
With the steady development of network intercom, many industries have gradually recognized the public network system, especially industries with relatively high requirements for information security, such as public security, railways, and energy companies, which have a great demand for self-built. According to customer needs, there are currently three self-built solutions to choose from:
Public server to build
Semi-built mode
Independent deployment
5.5.1 Public server to build
PTT cluster server is hosted by Zhuozhida in Alibaba Cloud and telecommunications room. The user side connects to the Internet through a wireless network to access the server. This solution will be deployed in dual computer rooms, and the database system adopts a load-balancing distributed architecture, with characteristics: improving the controllability and security of the system's disaster recovery, and simple implementation.
5.5.2 semi-self-built mode
semi-self-built mode solution refers to setting up a separate server according to customer needs according to customer needs when using the company's existing management platform. Through the company management platform, management groups, user information, and fees are consistent with the company's price system.
5.5.3 Independent deployment of
PTT cluster system database and PTT server independently deploy, which refers to the system software being completely independently built in the physical computer room specified by the customer. It is authorized by the dongle (and usage time), and is suitable for customer groups with high confidentiality level requirements.
6. Terminal planning
terminal types include: conventional intercom terminals, law enforcement recorder , multi-function terminals, and video application terminals.
computer dispatching station software supports Windows XP, Windows 7, Windows 10, MAC OS and other operating systems; handheld terminals support Symbian, Android, iPhone, Brew, WinCE, MTK, STM32 microcontroller platforms.
