CN204442702U - The indoor covering system of mobile communication three net signal - Google Patents

Abstract

The utility model discloses a kind of indoor covering system of mobile communication three net signal, for namely 2G+3G+4G tri-net is moved GSM900, UNICOM GSM900, telecommunications CDMA800, mobile TD-SCDMA, UNICOM WCDMA, telecommunications CDMA2000, mobile LTE-TDD, UNICOM LTE-FDD and telecommunications LTE-FDD mixture of networks multinet junction, it is characterized in that, described system comprises information source base station portion, net be connected with described information source part closes channel platform POI more, for by above-mentioned each net signals disperse to the compartment system of institute overlay area, described compartment system is closed channel platform by cable be connected with described nets more, described system comprises the distribution antenna be connected with described compartment system, described distribution antenna is wirelessly connected with mobile terminal.Whereby, the utility model realizes access and the covering of indoor 2G+3G+4G signal on the basis not changing China Mobile, CHINAUNICOM and the China Telecom 2G+3G+4G network coverage.

Description

The indoor covering system of mobile communication three net signal

Technical field

The utility model relates to the in-door covering technology of mobile communications network, particularly relating to a kind of indoor covering system of mobile communication three net signal, carrying out the system of in-door covering for 2G+3G+4G tri-being netted i.e. GSM, CDMA, TD-SCDMA, WCDMA, cdma2000, LTE (FDD) and LTE (TDD) network signal.

Background technology

China's mobile communication cause by leaps and bounds develops.Infrastructure of telecommunication Joint construction and sharing in 2015 work with mechanism reform innovation for power, will promote Joint construction and sharing effect and attaches most importance to, and conscientiously reduces repeated construction, strengthens resource-sharing, promote telecommunications industry healthy and sustainable development.The utility model proposes the covering system by a set of comprehensive mobile communication, complete the in-door covering of following 9 mobile communications networks simultaneously.

China Mobile:

2G-GSM (Global System for Mobile Communications, global system for mobile communications), working frequency range: up 890MHz-909MHz, descending 935MHz-954MHz.

3G-TD-SCDMA (time division synchronous CDMA, TD SDMA), working frequency range: up, be descendingly 2010MHz-2025MHz.

4G-LTE (TDD) (Iong Term Evolution, Long Term Evolution) (time dirision duplex time division duplex), working frequency range: up, be descendingly 2320MHz-2370MHz.

CHINAUNICOM:

2G-GSM, working frequency range: up 909MHz-915MHz, descending 954MHz-960MHz.

3G-WCDMA (wideband code division multiple access, Wideband Code Division Multiple Access (WCDMA)), working frequency range: up 1940MHz-1955MHz, descending 2130MHz-2145MHz.

4G-LTE (FDD), (FDD-frequency division duplex, Frequency Division Duplexing (FDD)), working frequency range: up 1745MHz-1765MHz, descending 1840MHz-1860MHz.

China Telecom:

2G-CDMA, (code division multiple access code division multiple access), working frequency range: up 825MHz-835MHz, descending 870MHz-880MHz.

3G-cdma2000, (CDMA 2000), working frequency range: up 1920MHz-1935MHz, descending 2110MHz-2125MHz.

4G-LTE (FDD), working frequency range: up 1765MHz-1780MHz, descending 1860MHz-1875MHz.

Therefore, the utility model proposes the indoor covering system comprising mobile communication three net signal (2G+3G+4G network signal), solve the in-door covering of totally 9 mobile radio communications of China Mobile, CHINAUNICOM and China Telecom simultaneously.

Utility model content

The utility model proposes a kind of indoor covering system of mobile communication three net signal, carrying out the system of in-door covering for 2G+3G+4G tri-being netted i.e. GSM, CDMA, TD-SCDMA, WCDMA, cdma2000, LTE (FDD) and LTE (TDD) network signal.With mobile GSM900, UNICOM GSM900, telecommunications CDMA800, mobile TD-SCDMA, UNICOM WCDMA, telecommunications cdma2000, mobile LTE-TDD, UNICOM LTE-FDD and telecommunications LTE-FDD mixture of networks multinet junction, described system comprises information source base station portion, net be connected with described information source part closes channel platform POI more, for by above-mentioned each net signals disperse to the compartment system of institute overlay area, described compartment system is closed channel platform by cable be connected with described nets more, described system comprises the distribution antenna be connected with described compartment system, described distribution antenna is wirelessly connected with mobile terminal.

Accompanying drawing explanation

Accompanying drawing 1 is the parameter form of the indoor covering system of mobile communication three net signal of the present utility model.

Accompanying drawing 2 is operating frequencies that 7 of the indoor covering system of mobile communication three net signal of the present utility model closes 1 mixer filter.

Accompanying drawing 3 is 1 point of 6 branching filter operating frequency figure of the indoor covering system of mobile communication three net signal of the present utility model.

Embodiment

As seen from Figure 1, in native system, base station has 9, belongs to movement, UNICOM, the large operator of telecommunications three respectively.POI has 12 entrances.They see Fig. 1 with each base station situation of being connected.In POI, each net downstream signal and upward signal separate in advance, are then closed the downstream signal netted after the filtering of road to Tx1 more.To the upward signal of many nets then along separate routes after filtering to Rx1.Transmit in two cables respectively again.Here it is, and uplink and downlink divide cable to transmit.

POI has 4 outlets.Tx1 and Rx1 is finally to the A area of coverage.Tx2 and Rx2 is finally to the B area of coverage.POI adopts 4 outlets, is the signal energy in order to make full use of each base station.Point is covered to each, only has 2 distribution antennas, 2 transmission cables.

For 4G base station, each base station all has 2 with frequently orthogonal uplink and downlink signals, needs to transmit in POI by binary channels.So closing path filter POI needs 12 input interfaces.

POI has 4 output interfaces to be connected with compartment system.The object done like this, can improve the isolation between the uplink and downlink signal of each base station, effectively suppresses the mutual interference between this base station signal and other base station signal.Further, because the signal transmitted in every root cable is many, utilance is high, thus reducings the construction costs.

1. the utility model basic ideas:

Adopt many nets downstream signal to close road filtering respectively with signal of surfing the net more.See accompanying drawing 2 and accompanying drawing 3.Formed:

1. many nets downstream signal and the space of surfing the net between signal isolate (> 80dB) more.

2. the frequency isolation of downstream signal between respectively netting, relies on the stopband closing path filter to suppress > 80dB.

3. the frequency isolation of upward signal between respectively netting, relies on the stopband of branching filter to suppress > 80dB.

4. in order to solve 3 4G nets (that is: UNICOM LTE (FDD), telecommunications LTE (FDD), mobile LTE (TDD) net) all

5. the dual-channel transmission 4G signal adopting isolation very high is needed, to reach the requirement of 4G MIMO technology.

6. the binary channels that 3 4G net by this programme designs respectively with frequency orthogonal signalling to be transmitted in 7 conjunction 1 conjunction path filters and 1 point of 6 branching filter.Ask for an interview accompanying drawing 2 and accompanying drawing 3 filter operating frequency figure.As seen from the figure, rely on the stopband suppression of filter and the space isolation of 2 filters, achieve the requirement of 4G signal binary channels high-isolation.

7. simultaneously as seen from the figure, the 3 rank intermodulation frequencies that every two descending net signals produce, all beyond the up band connection frequency of all nets, avoid downstream signal and close 3 rank intermodulation components that road produces to the Intermodulation Interference of respectively surfing the net.

8. for 3 group networks of nearby frequency bands, this programme adopts Tx-Tx electric bridge-isolator circuit to carry out electric bridge-isolator isolation,

To solve the requirement of their Tx-Tx isolation > 40dB.

Three groups of adjacent networks are:

9. (mobile GSM900 descending (935 → 954MHz))/(UNICOM GSM descending (954 → 960MHz))

10. (UNICOM LTE (FDD) descending (1840 → 1860MHz))/(telecommunications LTE (FDD) descending (1860 → 1875MHz))

(telecommunications cdma descending (2110 → 2125MHz))/(UNICOM WCDMA descending (2130 → 2145MHz))

5. each net Signal segregation degree situation of the present utility model, can meet the demand of engineering, reach:

A) isolation between each Tx/Rx: > 80dB;

B) the TX/TX isolation between base station signal source adjacent net: > 40dB.

They are:

I. move between GSM/ UNICOM GSM:

Ii. between UNICOM WCDMA/ telecommunications cdma2000;

Iii. between UNICOM LTE (FDD)/telecommunications LTE (FDD).

C) except above-mentioned 3 kinds of adjacent networks ports, the combination of two isolation > 80dB between all the other all different network ports;

Between the 4G net binary channels of d) same operator:

I.Tx-Tx isolation > 80dB;

IiTx-Rx isolation > 80dB.

The pass band transfer characteristics of 9 net signals of 6.POI mixed transfer (comprises linear distortion characteristic, nonlinear distortion characteristics, insertion loss characteristic, time-delay characteristics, impedance matching property, second order and third order intermodulation interference suppressioning characteristic etc.) equal engineering demands.

The power capacity of POI all of the port all meets engineering demand;

It is 0 DEG C ~ 50 DEG C that POI has operating temperature range, and RH range is 5% ~ 95%;

POI is formed completely without source block, its MTBF (mean time between failures (MTBF)) > 100,000 hours.

7., in " compartment system ", according to the requirement of the area of coverage, " trunk amplifier " " optical fiber repeater " etc. can be introduced, to increase the area of coverage.

8. the capacity (telephone traffic) of the whole area of coverage depends on the capacity of respectively " base station ".Respectively the capacity of " base station " is determined by " carrier number " of each base station of increase and decrease.

Claims (1)

1. the indoor covering system of a mobile communication three net signal, for namely 2G+3G+4G tri-net is moved GSM900, UNICOM GSM900, telecommunications CDMA800, mobile TD-SCDMA, UNICOM WCDMA, telecommunications CDMA2000, mobile LTE-TDD, UNICOM LTE-FDD and telecommunications LTE-FDD mixture of networks multinet junction, it is characterized in that, described system comprises information source base station portion, net be connected with described information source part closes channel platform POI more, for by above-mentioned each net signals disperse to the compartment system of institute overlay area, described compartment system is closed channel platform by cable be connected with described nets more, described system comprises the distribution antenna be connected with described compartment system, described distribution antenna is wirelessly connected with mobile terminal.