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E-Lins Industrial router applications Industrial-grade routers as Internet network layer communication equipment application in all walks of life, brought a lot of convenience for our industry. "E-Lins" introduce the application of industrial router scenario analysis.   1 The self-service terminal network   E-lins industrial router networking...

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Classification of 4G industrial routers There are many types of 4G industrial routers, which can be divided into different categories from different perspectives. Different types of 4G industrial routers can be used in different environments. The following sections classify the 4G industrial routers from different perspectives. According to the performance From...

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Dual SIM Router vs. Dual Radio Router Projects are looking to save their enterprises time and money ask us this very often: “When would I need to use dual SIMs, and in what situations should I consider dual radio dual sim router?” In order to make this clear, let’s take a quick look at the dual SIM and dual SIM dual radio module functionality. Dual...

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工业路由器NBMA网络转化为点到点的链路 当我们使用点到点子接口将NBMA网络转化为点到点的链路时,整个NBMA网络将产生过多的PVC部分互联或全互联的网状结构,但这将产生一定的负面影响,会使网络中产生大量的LSP泛洪流量。我们都知道,运行IS-IS的工业路由器当接收到一个LSP报文后,会将此LSP从除接收接口以外的所有启用了IS-IS协议的接口泛洪出去,以使网络中的其他工业路由器都可以接收到此LSP。但是这种泛洪机制对于存在大量部分互联或全互联的网络将产生过多冗余的LSP扩散。 所谓全互联或全网状网络拓扑,是指所有工业路由器都与其他工业级无线路由器向连接(通常是点到点子接口)。在这样的一个网络中,当一台路由器从某接口收到邻居泛洪过来的LSP后,由于它并不知道这个LSP是否已经被其他邻居工业4g路由器收到,所以会再从其他接口泛洪出去,即使其他工业级4g路由器的链路状态数据库中已经存在这个LSP。如果网络中有n个全网路由器的话,那么网络中的每台工业级LTE路由器都会扩散n-2条冗余的LSP,这样总共被泛洪的多余的LSP将为(n-1)x(n-2),条而这些LSP的扩散是多余。如果每台工业全网通路由器都刷新一条LSP的话,那么这个数量还将会成倍数的增长,导致了大量带宽资源的浪费。 为了解这种在全互联或高度互联的网络中出现的LSP泛洪的冗余现象,IS-IS提供了一种解决方案——IS-IS全通组,也称作Mesh组。IS-IS全通组在RFC2973中进行了定义。所谓全通组,就是假设所有工业3G路由器之间都是完全互联的,每个工业级全网通路由器都会直接收到其他全网通工业级路由器泛洪的原始的LSP的拷贝。 可以将全网工业路由器的接口加入到某个全通组中,一个全网通工业路由器上可以存在多个全通组,全通组内接口之间的LSP泛洪是受限制的,全通组之间的LSP泛洪是正常的操作,未加入全通组的工业级3G路由器接口与全通组之间也是正常的LSP泛洪操作。全网通路由器 ...

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工业路由器使用CSNP来保证链路状态数据库的完整性 在广播网络中,工业路由器使用CSNP来保证链路状态数据库的完整性,并且只有DIS才会发送工业全网通路由器CSNP报文,DIS发送CSNP报文的间隔为10s。CSNP报文中描述了DIS的链路状态数据库中所有工业级3G路由器LSP的摘要信息。当其他工业级路由器收到DIS发送的CSNP后,会使用CSNP中的LSP摘要信息与与本地的链路状态数据库中的LSP进行比较,进行比较的目的是确定本地链路状态数据库中的信息是否已经同步和完整。如果工业级4g路由器发现本地数据库中缺少某个LSP条目,那么它将使用PSNP向DIS请求这个缺少的LSP条目。这个PSNP报文中包含就是请求的LSP条目的摘要信息。当DIS收到其他全网路由器发送的PSNP报文后,将会发送一个完整的LSP报文,这个LSP就是其他工业无线路由器所缺少的LSP条目。在广播网络中,DIS使用周期性的CSNP报文向网络中发送同步链路状态数据库的信号,而其他工业4g路由器使用PSNP报文来请求缺少的LSP条目。 在IS-IS的点到点类型的网络中,链路状态数据库同步的操作与广播网络中略有不同,而且工业级全网通路由器发送CSNP与PSNP报文的方式和其作用也有一些差别。 在点到点网络中不存在DIS,工业3G路由器不会周期性的发送CSNP报文,CSNP报文只在链路链路被激活时发送一次,而且链路两端的工业级4g路由器都会发送CSNP报文以描述本地链路状态数据库中所有LSP的摘要信息。当工业路由器发送对端发送的CSNP中含有本地缺少的LSP信息时,也会使用PSNP报文向对端请求LSP。当对端收到PSNP报文后,将向请求方发送包含完整LSP信息的LSP报文,这点上与广播网络中的操作是相同的。但是在点到点链路上,收到LSP报文的工业4g路由器还会向对方再次发送一个PSNP报文以对之前收到的LSP进行确认。可以说,在点到点网络中的LSP交换是可靠的。这点与广播网络不同,在广播网络中工业级无线路由器不使用PSNP报文对收到的LSP进行确认,而是通过DIS周期性地发送CSNP报文以弥补广播网络中不可靠的LSP交换。 在点到点链路上,工业路由器使用PSNP对收到的LSP报文进行确认,所以在点到点链路上是可靠的泛洪机制。 IS-IS路由协议支持两种网络类型:广播链路和点到点链路。默认情况下,全网通工业级路由器IS-IS将广播网络和NBMA网络看作是广播类型。对于封装了PPP或HDCL等协议的链路看作是点到点类型。对于NBMA网络中的主接口和点到多点子接口,IS-IS将其看作是广播类型;对于NBMA网络中的点到点子接口,将其看作是点到点类型。IS-IS不像OSPF那样,提供了对NBMA网络(例如Frame-Relay、ATM)的专门支持。对于NBMA网络,全网通工业路由器IS-IS认为其网络拓扑是PVC全互联(mesh)的,就是把它看作广播网络。但如果实际网络拓扑中并不是PVC全互联的结构时,例如部分互联的结构和Hub-Spoke结构,推荐使用点到点类型网络,即使用点到点子接口,以免造成NBMA网络中的链路状态数据库同步出现问题。无线路由器

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Wireless M2M Solution for Environmental

Category : 其他

Wireless M2M Solution for Environmental

Environmental information of large quantity, various kinds and quick update is in urgent demand. Thus, how to establish environmental data acquisition systems of practical use, wide coverage, real-time, and flexibility?  Data transmission with GPRS wireless network comes. Pollution monitoring equipment could send collected pollution data and alarm information to environmental monitoring department with GPRS network timely, achieving efficient and effective management over sewage units.

Wireless M2M Solution for Energy Sources

Category : 其他

Wireless M2M Solution for Energy Sources

 

With tech development, E-Lins smart series modules and computer-systems appear to serve oil field, able to remote monitor and collect oil equipment data. Oil well pump is the key part in oil field. Large quantity and wide spread of oil wells increases labor intensity, moreover impacting real-time data extraction and accuracy of equipment monitoring. Oil field monitoring and operating system, based upon computer and GPRS wireless data radio, solves the problem, greatly improving oil production efficiency, reducing overall cost, and realizing oil production and management automation.

Wireless Router for Mobile Network

Category : 其他

Mobile wireless router is for mobile cellular network, providing wifi and rj45 connection, for Soho and Industrial class use.
From technology, Wireless router is mainly classified in wireless wifi router, wireless wimax router, and wireless cell router.
From used filed, wireless router is classified soho (also called in non-industrial) class, and industrial class for Industrial Ethernet Router.
SOHOis for large data use, for example 3Grouter (including EVDO Router, HSDPA Router, and HSUPA Router, and HSPA Router.)
A wireless router is a device that performs the functions of a router but also includes the functions of a wireless access point and a network switch. They are commonly used to allow access to the Internet or a computer network without the need for a cabled connection. It can function in a wired LAN (local area network), a wireless only LAN (WLAN), or a mixed wired/wireless network. Most current wireless routers have the following characteristics:
1. LAN RJ45 ports, normally 1 or 2 or 4 ports, which function in the same manner as the ports of a network switch
2.      A WAN port, normally 1 RJ45 port to connect to a wide area network, typically one with Internet access. External destinations are accessed using this port. If it is not used, many functions of the router will be bypassed.
3.      Wireless antennae. These allow connections from other wireless devices (NICs (network interface cards), wireless repeaters, wireless access points, and wireless bridges, for example), usually using the Wi-Fi standard.
4.      Some wireless routers also include a DSL or cable modem in addition to their other components.
As for the wireless antenna, contains GSM/3Gcellular antenna and WiFi/Wimax antenna, with different connecting type, such as SMA. Normally antenna is default packed by manufacturer. High gain antenna is available for replacement to receive better and stronger signal so as to get good receiving and transmission of data.

Wireless M2M Make Machine Talk

Category : 其他

What’s wireless M2M?

M2M=Machine to Machine, which means let the machines communicates together. Wireless M2M use wireless network for the communications, such as cellular wireless network, RFID, WiFi, Wimax and other networks.

Wireless-M2M, provides communications between people, devices and systems that turns data into information, that can communicate with companies management systems so they can act upon it. Machine-to-machine solutions are giving corporate adopters an efficient and cost-efficient method to make necessary connections happen. Companies adopting M2M are using these solutions to solve their challenges, whether it is by industry or application. Machine-to-machine business is about creating solutions aimed at improving existing business, creating new opportunities, and essentially making daily life easier. What makes M2M solutions so essential is that the technology is driven more by devices interacting with people and other devices and systems. The goal is to increase performance and competitiveness of companies, cost-saving and better service levels.

Wireless-M2M solutions range from embedded modules and boards, to external boxed solution products can make virtually any existing, or legacy devices to be easily networked, either wired or wireless. Our wireless connectivity products utilise Bluetooth, GSM, GPRS and Wi-Fi technologies to simplify cabling, increase user mobility, and enable remote device management. Wireless-M2M has helped customers in a range of vertical markets wirelessly enable their products all over the world. Applications range from Remote Data Monitoring, asset tracking, Retail Business messaging, Remote Alarm Monitoring, EPOS, Industrial, Energy Management and many others.

Wireless M2M communications Wireless-M2M range of GSM, GPRS, Bluetooth, Wireless and GPS, intelligent products provide the most robust, high-performance, and fastest route for wireless connectivity into products for data and multimedia applications for easy integration.

However, cellular network is the most used and mainly used for wireless m2m. The GSM network, 3G network, even new 4G network are the good choice for M2M if the cable network is unconvenient to get.

Cellular Producuts for Wireless M2M

Category : 其他

Equipment is normally at remote site from anywhere in the world, which need monitor or remote management. With wireless cellular device for connection, no more expensive site visiting.

The Global System for Mobile Communications Service is the most widely use. GSM also provides a number of carefully standardized and broadly supported capabilities such as Short Message Service (SMS), circuit switched data (CSD) and General Packet Radio Services (GPRS). Used on all bands throughout the world. 900 and 1800MHz, higher bands for data and imaging. Choose from our vast range of products from a simple GSM modems to a high performance GPRS2G router or a3G HSPA router.

GSM Modems have Plug & Play solution for quick and easy integration. The wide performance range and robust case of the our modems and routers enables you to quickly develop new telemetry and telematic applications. Our GSM Modems and routers come complete with all accessories to enable you to start an application. Some even come complete with additional features, such as fixed IP SIM card, application toolkit and extended AT Commands for the industrial environment.

Mainly wireless M2M device covers:
Cellular Router;
Cellular Modem;
Cellular IP modem;
Others.
During them, router and modem is the most used.

A. Routers
1. gprs router
2. edge router
3. cdma1x router
4. HSDPA router
5. HSUPA router
6. HSPA/HSPA+ router
7. EVDO router
8. 4G LTE router

B. Modem
1. gprs modem
2. edge modem
3. cdma1x modem
4. HSDPA modem
5. HSUPA modem
6. HSPA/HSPA+ modem
7. EVDO modem
8. 4G LTE modem

Port types: RJ45 ethernet, USB, RS232, RS485, TTL.

2G router and 2g modem is for small data. 3g router and 3g modem are for big data transmission requirements.
3g wifi router is a router with wifi connection, which is convenient for management locally.

Wireless M2M Solution for Security

Category : 其他

Security access control system has become an extremely important part of security system.

The fundamental reason is that it takes the initiative to replace the passive monitor, such as CCTV, burglar alarms, to control main channels to prevent criminals from entering through normal channels, and that it is able to control access doors to deter crime or reduce losses. In recent years, GPRS access control system has been popular, applied to postal system, power supply system, banking system, residential area, hotels, etc.. It greatly improves security management efficiency.

Wireless M2M Solution for Traffic

Category : 其他

Wireless M2M Solution for Traffic

Smart Traffic is a new type of transportation of information, intelligence and socialization, making use of advanced tech, including information, communication, and control. Car satellite positioning system is quite a good example. GPRS/CDMA network could also be applied to position buses, taxies, trucks, to master the overall situation for monitor and dispatch

Wireless M2M Solution for Financial System

Category : 其他

Wireless M2M Solution for Financial System

POS (Point of Sales) real-time service system is the important base of realizing commercial automation.China’s banks have set up their own systems of cable access to POS systems, but the cable POS machines are always restricted by space and telecommunication lines, which make it hard to achieve the goal that card consumption can be quick and checked at anytime and anyplace. The access way of GPRS wireless POS machines can solve the problem that POS machines can only be used on some fixed occasions, which makes POS machines not restricted by the telecommunication, and now it has been widely accepted by customers, such as, hotels, gas companies, bus companies, highway authorities, banks, distribution centers, passenger ticketing centers, taxation departments, delivery companies, and mobile sales offices, etc.

Wireless M2M Solution for Water Conservancy

Category : 其他

Wireless M2M Solution for Water Conservancy

Hydrological station is a site to collect basic water information, the basis for hydrological work. With basin’s rapid economic growth and population growth, conflict between water supply and demand is more and more prominent.  Real-time hydrological data, collected by hydrological station, is in great demand. The use of digital video surveillance system, to collect data, image, sound, video, improves accuracy. Hydrological stations spread widely and remotely. Thus, it’s impossible to use of wired or fiber communication to delivery data. In contrast, wireless communication wiring is simple, convenient, and the cost is relatively low, saving a lot of investment. E-Lins Router series is a smart choice for hydrological application

Difference in between LTE FDD and TDD?

Category : 其他

What is difference in between LTE FDD & TDD?

In both LTE FDD and LTE TDD, the transmitted signal is organized into subframes of 1 millisecond (ms) duration and 10 subframes constitute a radio frame. Each subframe normally consists of 14 OFDM symbols (12 OFDM symbols in case of the so-called Extended Cyclic Prefi).

Although the frame structure is, in most respects, the same for LTE FDD and LTE TDD, there are some differences between the two, most notably the use of special subframes in TDD. Another difference is the other subframes are allocated either for uplink transmission or for downlink transmission.

In case of FDD operation, there are two carrier frequencies, one for uplink transmission (fUL) and one for downlink transmission (fDL). During each frame, there are consequently 10 uplink subframes and 10 downlink subframes and uplink and downlink transmission can occur simultaneously within a cell.

In case of TDD operation, there is only one single carrier frequency and uplink and downlink transmissions in the cell are always separated in time. As the same carrier frequency is used for uplink and downlink transmission, both the base station and the mobile terminals must switch from transmission to reception and vice versa. Thus, as a subframe is either an uplink subframe or a downlink subframe, the number of subframes per radio frame in each direction is less than 10.

Check further info at www.e-lins.com for 4G LTE info.