4G Cell Phone Jammer Mobile communication system, a base station is responsible for various functions associated with the wireless as MS (mobile station) to provide UM interface to access the system, directly connected by a wireless MS, the impact of the fault on the system, the mobile network base stations can occur big. The base station failure causes are many, but most fall into the following four categories:
A. Failure caused by transmission problems
4g cell phone jammer Although belonging to the wireless mobile communication, but it is actually a combination of wireless and wired. A base station controller interface and the mobile services switching center (MSC) and a base station controller (BSC) between (BSC) which interfaces with the physical connection channel ABIS station (BTS) are used between the base transceiver standard 2.048MB / S PCM digital transmission to achieve. Another stable base of each part is inseparable from stable clock signal and the clock signal is extracted from the base of PCM transmission, Ericsson's base port does not provide an external clock input, the base station equipment is based on the traditional PDH group net square test and design. 4g cell phone jammer
At present, the transmission device is gradually transition from SDH to PDH, SDH transmission system in accordance with, due to the pointer adjustment, the transfer clock is transmitted through the line code, the add-drop multiplexer (ADM) dedicated clock output port. If a method to extract the clock from the SDH with the road code stream, it will bring problems such as out of step, slippery yards, dead stop. As Shimbashi Station Ericsson RBS200 original equipment, transmission using SDH systems, this station has been unstable since the opening, after Ericsson engineers to inspect the discovery of base station synchronization is not good, it is recommended PDH transmission system, or base station using RBS2000 equipment, (RBS2000 synchronization requirements more RBS200 low), to replace the original equipment after use RBS2000 RBS200 equipment, base stations working properly so far.
Routine maintenance often have all or part of the base station carrier frequency instability phenomenon sometimes when you retire clothes work, BSC side of the CF test results for BTS COMMUNICATION NOT POSSIBLE or CF LOAD FAILED. Most of such failure to transmit instability have errors, slips caused. When transmission errors accumulated to a certain time, BSC can not control the base station, the data is loaded, this time by the new OMT for IDB data loading in local mode, return to normal after a reset.
Second, because the base station software problems caused by failure
Base station system software is command and control station components orderly, normal work. If the base station IDB data does not match with the base station, the base station will not work properly. Such as base stations for transmission on the North Pier compression (two compressed into one) found that A, B and C residential community work is not working properly, indicating that BSC can not communicate with C-cell, so the suspicion with which wanted to neighboring B cells software is set incorrectly, the view found B-cell transmission mode is set to be mistaken STANDALONE (separate mode), when a transmission transmission ABC each sector should be separately set CASCADE, CASCADE, STANDALONE, changed the transmission mode B the base station back to normal after CASCADE.
Third, because the base station hardware failure caused
Such failures are more common phenomenon than the obvious, generally have faulty hardware FOULT its red lantern is lit, but sometimes it can not be fooled by the surface illusion.
For example Tangzha station B sector a carrier frequency (TRU) out of service, the carrier frequency of the station found this red FOULT lights and TX NOT ENABLE lights are lit, so judge for TRU hardware damage, replacement failure phenomenon remains the same, this time replace the TRU committed a "stop-gap" error, TRU out of service for its own hardware failure may also possibly with other hardware or wiring faults connected. After the diagnosis OMT software prompts for CU to connect fault TRU between inspection found loose connections, re-connect the fault disappears after. For such a failure it is recommended to use OMT software for fault location, replacement unit operates according to the recommendations OMT, and not just look at the surface. 4g cell phone jammer
Fourth, due to various disturbances caused by the failure
Mobile communication system disturbances will affect the normal operation of the base station, there is co-channel interference, adjacent channel interference, intermodulation interference. Now terrestrial cellular mobile communication system using the same frequency multiplexing to increase the frequency of utilization, increase system capacity, but it also introduced a variety of interference.
New Website routine maintenance and expansion of the station to the new load frequency selection unreasonable base frequency will not work for such failure shall cooperate with the network optimization, considering various factors, selecting a reasonable frequency, eliminating more interference.
Base stations for mobile communication systems should be carefully analyzed all kinds of trouble, find their real reason to the fastest troubleshooting, improve network quality. 4g cell phone jammer
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