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List of contents of this article:

• 1,The difference between cluster mobile communication system and gsm system andContact
• 2, Classification of mobile communication system
• 3, How to communicate with the cluster server
• 4、Comparion of the capacity of cluster mobile communication

The difference and connection between cluster mobile communication system and gsm system

SDH is a transmission system, while GSM is a wireless communication network system. The transmission system must be included in the whole communication network.

GSM mobile phones also allow users to receive short messages long as 160 words. CDMA and GSM are the main 2G communication.Streaming, technically speaking, the difference between them is that the method of wireless transmission and reception is different, and the methods of modulation and demodulation are different. For users, their difference lies in: call quality.

G speed is faster than GSM. 3G can make video calls. Now there is only Shanghai, Beijing and Hangzhou.

Different standard TD-LTE (4G)/TD-SCDMA/GSM: It is the evolutionary standard in the transition and upgrading of the third-generation mobile communication to the fourth generation. GSM/WCDMA/LTE: The third-generation digital communication standard is a 3G cellular network.

To be honest, CDMA has better advantages than GSM (1) The system capacity is large. The CDMA mobile network is 20 times larger than the analog network and 4-5 times larger than GSM.(2) The configuration of system capacity is flexible. In the CDMA system, the increase in the number of users is equivalent to the increase in background noise, resulting in a decline in voice quality.

Global System for Mobile Communication is a well-known GSM, which is currently the most widely used mobile phone standard.

Classification of mobile communication system

Classification of mobile communication system can be classified according to its application. The maritime satellite mobile system is mainly used to improve maritime rescue work, improve the efficiency and management level of ship use, and enhance maritime communication services and wireless positioning capabilities.

Satellite mobile communication. Using satellite forwarding signals can also realize mobile communication. For on-board mobile communication, equatorial fixed satellites can be used, and for handheld terminals, it is more advantageous to use multi-constellation satellites in medium and low orbits. ( 4) Cordless telephone.

The mobile communication system consists of two parts: the space system and the ground system. Ground system: refers to satellite mobile radio stations, antennas, checkpoint stations and base stations.Since the birth of the mobile communication system in the 1980s, it will go through roughly five generations of development by 2020, and by 2010, it will transition from the 3rd generation to the 4th generation (4G).

Mobile communication is a communication method used to communicate between mobile users and fixed-point users or between mobile users. One or both parties to the communication are in motion. Mobile communication includes land, sea and air communication, and the frequency bands cover low frequency, medium frequency, high frequency, very high frequency and ultra-high frequency.

How the cluster server communicates

All servers in the cluster are connected to the core switch. 2. The core switch port is not enough, and the cluster server is connected.To a high-level aggregation switch, and then the aggregation switch is connected to the core switch through the 10G/100G port. Both of these methods are used a lot, and it depends on the actual use.

DAC client logs in to the DAS server site and performs scheduling management operations through the interaction of DAS with PDS and PHR. The MSS switching subsystem is composed of entities such as mobile switching center MSC, belonging location register HLR, visiting location register VLR, authentication center AuC and short message center SMC.

The communication server provides communication channels for one or more than one user at the same time according to the software and hardware capabilities.

I said the easiest way: route to map 80 and the remote port to the 80 and remote port of the Web server.Map other ports (such as 4489) to the remote port of the database server on the route. This solves the problem that both servers need to log in remotely.

Comparation of the capacity of the networking method of cluster mobile communication

There are more than 1,000 users in each community, and the final capacity of all coverage areas can reach 1 million users. ( 3) Satellite mobile communication. Using satellite forwarding signals can also realize mobile communication. For on-board mobile communication, equatorial fixed satellites can be used, and for handheld terminals, it is more advantageous to use multi-constellation satellites in medium and low orbits. ( 4) Cordless telephone.

The first-generation mobile communication system simulates cellular mobile communication, mobility and cellular network.It started from the first generation of mobile communication, but 1G is an analog communication with poor anti-interference performance. At the same time, the simple use of FDMA technology makes the frequency multiple use and system capacity not high.

The first generation of mobile communication system is a simulated cellular mobile communication. The characteristics of mobility and cellular network come from the first generation of mobile communication, but 1G is analog communication with poor anti-interference performance. At the same time, the simple use of FDMA technology makes the frequency multiplex and system capacity not high.

Mainly digital broadband technology. In the 4G mobile communication system, the signal takes millimeter wave as the main transmission band, and the cellular community will also be much smaller, which greatly improves the user capacity, but also causes a series of technical problems. ( 3) Good compatibility.