CN104901729A - Low-interference distributed antenna system signal transmission method and remote antenna unit thereof - Google Patents
Low-interference distributed antenna system signal transmission method and remote antenna unit thereof Download PDFInfo
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- CN104901729A CN104901729A CN201410083452.0A CN201410083452A CN104901729A CN 104901729 A CN104901729 A CN 104901729A CN 201410083452 A CN201410083452 A CN 201410083452A CN 104901729 A CN104901729 A CN 104901729A
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Abstract
The invention provides a low-interference distributed antenna system signal transmission method and a remote antenna unit thereof. The remote antenna unit is provided with an antenna device, a testing radio-frequency output/input device and a controller, wherein the antenna device is provided with a plurality of antenna ends; and the testing radio-frequency output/input device is used for receiving a radio-frequency signal of a user device through the antenna ends. The controller is used for executing an antenna end selection program which comprises the following steps: reading the radio frequency signal; calculating the connection quality between the user device and each antenna end according to the radio frequency signal; and selecting an antenna end which is subsequently connected with the user device according to the connection quality. Through the steps above, the remote antenna unit can be connected with the user device through an antenna end with lowest interference.
Description
Technical field
The present invention about a kind of radio transmitting method and system thereof, espespecially a kind of low interference decentralized antenna system method for transmitting signals and remote antenna unit thereof.
Background technology
Existing wireless transmitting system has a frequency communication devices and a wireless device be connected with this frequency communication devices.
This wireless device receives this radiofrequency signal and has multiple wireless interface receiving end, wherein these wireless interface receiving ends have a different radio signal transmission scope respectively, and this wireless device receives and dispatches this radiofrequency signal by the user's device within the scope of these wireless interface receiving ends and these radio signal transmission.
But, due to wireless device by these wireless interface receiving ends respectively with form wireless link between the user's device sending radiofrequency signal and be connected, and wherein wireless link is easily subject to various factors interference, as factor of natural environment or and all the other wireless transmitting systems between mutually disturb, and then make the radiofrequency signal transmitted in wireless link produce a large amount of interference signals, have a strong impact on the quality of communication.
Summary of the invention
The object of the invention is to provide a kind of low interference decentralized antenna system method for transmitting signals and remote antenna unit thereof, to solve the defect of existing wireless communications transmission system.
Technical scheme of the present invention is to provide a kind of low interference decentralized antenna system method for transmitting signals and remote antenna unit thereof, and this method for transmitting signals includes:
A () lays a decentralized antenna system;
B () receives the radiofrequency signal of the user's device within the scope of its radio communication by each antenna end of a remote antenna unit of this decentralized antenna system and is reported to this remote antenna unit;
C () calculates the connection quality between each antenna end and this user's device according to this radiofrequency signal; And
D antenna end that () is connected with this user's device after selecting according to this connection quality.
The present invention also provides a kind of remote antenna unit, and said distal ends antenna element includes:
One antenna assembly, has multiple antenna end, and these days, line end received the radiofrequency signal of user's device in its communication range respectively;
One radio frequency input/output device, in order to be connected with a head end, and is connected to obtain radiofrequency signal with this antenna assembly, and exports this radiofrequency signal to this head end;
One testing radio frequency input/output device, is connected to this antenna assembly to obtain the radiofrequency signal of this user's device; And
One controller, is connected to this antenna assembly and this testing radio frequency input/output device, and performs an antenna end option program, and wherein this antenna end option program has following steps:
A () reads the radiofrequency signal of this testing radio frequency input/output device;
B () calculates the connection quality between each antenna end of this antenna assembly and this user's device according to this radiofrequency signal; And
C antenna end that () is connected with this user's device after selecting according to this connection quality.
By low interference decentralized antenna system method for transmitting signals of the present invention and remote antenna unit thereof, when making each antenna end of said antenna device connect user's device, the antenna end be connected with this user's device after can selecting according to the connection quality between each antenna end and this user's device, to guarantee this user's device energy and to disturb minimum antenna end to form wireless link by external factor between it, maintain preferred communication quality to reduce interference signal interference.
Accompanying drawing explanation
Fig. 1 is a calcspar with the preferred embodiment of the decentralized antenna system of remote antenna unit of the present invention.
Fig. 2 is the calcspar of remote antenna unit of the present invention.
Main element symbol description
10 head end 20 remote antenna unit of the present invention
21 antenna assembly 211A ~ 211D antenna end
212 transport communication port 213 test communications ports
22 radio frequency input/output device 23 testing radio frequency input/output devices
24 controller 30 user devices
Embodiment
Refer to shown in Fig. 1, the preferred embodiment of one decentralized antenna system has a head end (HEU) 10 and multiple remote antenna unit (RAU) 20 of the present invention, wherein these remote antenna unit 20 are connected to this head end 10 jointly, wherein this head end 10 is connected to a signal source, in this preferred embodiment, this signal source can be a base station or a network computer room.
Refer to shown in Fig. 2, each remote antenna unit (RAU) 20 has antenna assembly 21, radio frequency input/output device 22, testing radio frequency input/output device 23 and a controller 24.
This antenna assembly 21 has four antenna end 211A ~ 211D, multiple transport communication port 212 and multiple test communications port 213, wherein this four antenna end 211A ~ 211D has different radio communication scopes respectively, and each antenna end 211A ~ 211D can receive and dispatch the radiofrequency signal of multiple communications band, and the request in its communication range that wirelessly receives is connected to the radiofrequency signal of user's device 30 of network.These transport communication ports 212 and these test communications ports 213 be selectively connected with these four antenna end 211A ~ 211D or disconnect, and the quantity of these transport communication ports 212 is the quantity higher than these test communications ports 213.
This radio frequency input/output device 22 is connected to this antenna assembly 21 by these transport communication ports 212, to obtain the radiofrequency signal of these antenna device 21.
This testing radio frequency input/output device 23 is connected to this antenna assembly 21 by these test communications ports 213, to obtain the radiofrequency signal of user's device 30 that each antenna end 211A ~ 211D receives in this antenna assembly 21.
This controller 24 is connected with this antenna assembly 21 and this testing radio frequency input/output device 23 respectively, and when remote antenna unit 20 of the present invention starts, this controller 24 performs a built-in antenna end option program, and wherein these days, line end option program had following steps:
Read the radiofrequency signal (S1) of this testing radio frequency input/output device 23.
The connection quality (S2) between each antenna end 211A ~ 211D and this user's device 30 is calculated according to this radiofrequency signal.
Antenna end 211A ~ the 211D (S3) be connected with this user's device 30 after selecting according to this connection quality.
Step details about the antenna end option program of the invention described above remote antenna unit 20 is detailed as described below.
About above-mentioned steps (S2), this controller 24 is according to this connection quality of testing radio frequency calculated signals exported by this testing radio frequency input/output device 23.Then, in this preferred embodiment, refer to shown in following table 1, this connection quality includes a signal to noise ratio and a signal strength signal intensity, wherein the account form of this signal to noise ratio be this testing radio frequency input/output device 23 receive radiofrequency signal divided by its interfering signal power, i.e. RF signal power/interfering signal power.This signal strength signal intensity is then the intensity of this radiofrequency signal, and unit is dBm.
Table 1
About above-mentioned steps (S3), the first comparison of this controller 24 connects the signal to noise ratio of this user's device 30 with each antenna end 211A ~ 211D, and selects an antenna end 211A ~ 211D of signal to noise ratio numerical value better (namely signal to noise ratio numerical value is higher) or the signal strength signal intensity better (namely signal strength signal intensity is higher) connecting this user's device 30 these days in line end 211A ~ 211D as the antenna end 211A ~ 211D connecting this user's device 30 afterwards.
Again, in this preferred embodiment, the preferential comparison of this controller 24 connects the signal to noise ratio of this user's device 30 with each antenna end 211A ~ 211D, and select the signal to noise ratio numerical value better (namely signal to noise ratio numerical value is higher) connecting this user's device 30 these days in line end 211A ~ 211D as the antenna end 211A ~ 211D connecting this user's device 30 afterwards, and only when there being multiple antenna end 211A ~ 211D to connect the signal to noise ratio of this user's device 30 with when being judged to be better by this controller 24, this controller 24 just further in the middle of comparison signal to noise ratio be all the signal strength signal intensity that higher antenna end 211A ~ 211D connects this user's device 30, and select wherein signal strength signal intensity preferably as the antenna end 211A ~ 211D connecting this user's device 30 afterwards.
Refer to shown in table 1, with two antenna end 211A, the signal to noise ratio that 211B connects this user's device 30 is all 10 and all higher than with all the other two antenna end 211C, 211D connects the signal to noise ratio of this user's device 30, the further comparison of this controller 24 is with these two antenna end 211A, 211B connects the signal strength signal intensity of this user's device 30, the signal strength signal intensity wherein connecting this user's device 30 with this antenna end 211A is-60, higher than the signal strength signal intensity-70 connecting this user's device 30 with this antenna end 211B, therefore, can go to connect this user's device 30 with this antenna end 211A after remote antenna unit 20 of the present invention, make to form preferably wireless link between remote antenna unit 20 of the present invention and this user's device 30, to guarantee that wireless connections between the two have preferably signal to noise ratio and certain signal strength signal intensity maintenance communication quality.
Refer to shown in Fig. 2, this controller 24 makes this testing radio frequency input/output device 23 be connected with line end 211A ~ 211D these days by selecting multiple transport communication ports 212 of this antenna assembly 21, export the radiofrequency signal of the user's device 30 received by each antenna end 211A ~ 211D to this controller 24 respectively again, this controller 24 is made to be connected quality using the wireless connection conditions of whole antenna end 211A ~ 211D and this user's device 30 to perform above-mentioned steps (S1) ~ (S3) as this respectively, find out the better antenna end 211A ~ 211D be connected with this user's device 30.After above-mentioned steps (S1) ~ (S3), when wanting transceiving radio frequency signal between this remote antenna unit 20 of the present invention and this user's device 30, this controller 24 makes this radio frequency input/output device 22 be connected with this antenna end 211A by selecting a wherein transport communication port 212 of this antenna assembly 21, and this radio frequency input/output device 22 is by this antenna end 211A and this user's device 30 transceiving radio frequency signal.
In sum, after the antenna end option program of remote antenna unit 20 of the present invention, really can go to connect this user's device 30 with optimal antenna end 211A, make this antenna assembly 21 can form with this user's device 30 wireless link that has the signal strength signal intensity of higher signal to noise ratio and certain level, and with this preferably wireless link transceiving radio frequency signal, maintain the radio communication quality between remote antenna unit 20 of the present invention and this user's device 30.
Claims (15)
1. a low interference decentralized antenna system method for transmitting signals, is characterized in that having following steps:
A () lays a decentralized antenna system;
B () receives the radiofrequency signal of the user's device within the scope of its radio communication by each antenna end of a remote antenna unit of this decentralized antenna system and is reported to this remote antenna unit;
C () calculates the connection quality between each antenna end and this user's device according to this radiofrequency signal; And
D antenna end that () is connected with this user's device after selecting according to this connection quality.
2. low interference decentralized antenna system method for transmitting signals as claimed in claim 1, it is characterized in that, signal to noise ratio when each antenna end is connected with this user's device is included in the connection quality described in this step (c), and the antenna end be connected with this user's device after selecting according to this signal to noise ratio when this step (d).
3. low interference decentralized antenna system method for transmitting signals as claimed in claim 1, it is characterized in that, signal strength signal intensity when each antenna end is connected with this user's device is included in the connection quality described in this step (c), and the antenna end be connected with this user's device after selecting according to this signal strength signal intensity when this step (d).
4. low interference decentralized antenna system method for transmitting signals as claimed in claim 1, it is characterized in that, signal to noise ratio when each antenna end is connected with this user's device and signal strength signal intensity is included in the connection quality described in this step (c), and the antenna end be connected with this user's device after selecting according to this signal to noise ratio and this signal strength signal intensity when this step (d).
5. low interference decentralized antenna system method for transmitting signals as claimed in claim 2, it is characterized in that, when this step (d), select to there is the antenna end of higher signal to noise ratio as the antenna end be connected with this user's device afterwards when being connected with this user's device.
6. low interference decentralized antenna system method for transmitting signals as claimed in claim 3, it is characterized in that, when this step (d), select to there is the antenna end of higher signal strength as the antenna end be connected with this user's device afterwards when being connected with this user's device.
7. low interference decentralized antenna system method for transmitting signals as claimed in claim 4, it is characterized in that, there is the antenna end of higher signal to noise ratio as the antenna end be connected with this user's device afterwards when preferential comparison is connected with this user's device when this step (d), if have multiple antenna end with higher signal to noise ratio simultaneously, when then comparison is connected with this user's device further, the described signal strength signal intensity with the antenna end of higher signal to noise ratio, and select the antenna end wherein with higher signal strength as the antenna end be connected with this user's device afterwards.
8. a remote antenna unit, is characterized in that, this remote antenna unit has:
One antenna assembly, has multiple antenna end, and described antenna end receives the radiofrequency signal of user's device in its communication range respectively;
One radio frequency input/output device, in order to be connected with a head end, and is connected to obtain radiofrequency signal with this antenna assembly, and exports this radiofrequency signal to this head end;
One testing radio frequency input/output device, is connected to this antenna assembly to obtain the radiofrequency signal of this user's device; And
One controller, is connected to this antenna assembly and this testing radio frequency input/output device, and performs an antenna end option program, and wherein this antenna end option program has following steps:
A () reads the radiofrequency signal of this testing radio frequency input/output device;
B () calculates the connection quality between each antenna end of this antenna assembly and this user's device according to this radiofrequency signal; And
C antenna end that () is connected with this user's device after selecting according to this connection quality.
9. remote antenna unit as claimed in claim 8, it is characterized in that, in this antenna end option program step (b) described in connection quality include signal to noise ratio when each antenna end is connected with this user's device, and the antenna end be connected with this user's device after selecting according to this signal to noise ratio when this step (c).
10. remote antenna unit as claimed in claim 8, it is characterized in that, in this antenna end option program step (b) described in connection quality include signal strength signal intensity when each antenna end is connected with this user's device, and the antenna end be connected with this user's device after selecting according to this signal strength signal intensity when this step (c).
11. remote antenna unit as claimed in claim 8, it is characterized in that, in this antenna end option program step (b) described in connection quality include signal to noise ratio when each antenna end is connected with this user's device and signal strength signal intensity, and the antenna end be connected with this user's device after selecting according to this signal to noise ratio and this signal strength signal intensity when this step (c).
12. remote antenna unit as claimed in claim 9, is characterized in that, select to have the antenna end of higher signal to noise ratio as the antenna end be connected with this user's device afterwards when being connected with this user's device when this step (c).
13. remote antenna unit as claimed in claim 10, is characterized in that, select to have the antenna end of higher signal strength as the antenna end be connected with this user's device afterwards when being connected with this user's device when this step (c).
14. remote antenna unit as claimed in claim 11, it is characterized in that, there is the antenna end of higher signal to noise ratio as the antenna end be connected with this user's device afterwards when preferential comparison is connected with this user's device when this step (c), if have multiple antenna end with higher signal to noise ratio simultaneously, when then comparison is connected with this user's device further, the described signal strength signal intensity with the antenna end of higher signal to noise ratio, and select the antenna end wherein with higher signal strength as the antenna end be connected with this user's device afterwards.
15. remote antenna unit according to any one of claim 8 to 14, it is characterized in that, this antenna assembly has further:
Multiple transport communication port, is connected with this radio frequency input/output device; And
Multiple test communications port, is connected with this testing radio frequency input/output device, and the quantity of wherein said test communications port is less than the quantity of described transport communication port;
Wherein this controller selectively makes described transport communication port and described test communications port be connected with each antenna end of this antenna assembly or disconnect.
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| CN201410083452.0A CN104901729A (en) | 2014-03-07 | 2014-03-07 | Low-interference distributed antenna system signal transmission method and remote antenna unit thereof |
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| CN201410083452.0A CN104901729A (en) | 2014-03-07 | 2014-03-07 | Low-interference distributed antenna system signal transmission method and remote antenna unit thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113825090A (en) * | 2021-09-30 | 2021-12-21 | 广州广日电梯工业有限公司 | Wireless communication system and method for elevator |
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| US20120038521A1 (en) * | 2010-08-13 | 2012-02-16 | Yuan Zhu | Configurable common rerfernce signal port for reference signal received power in distributed antenna systems |
| CN102738597A (en) * | 2012-04-26 | 2012-10-17 | 大连海事大学 | Distributed type array antenna system |
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| CN101741441A (en) * | 2008-11-12 | 2010-06-16 | 华为终端有限公司 | Wireless terminal and antenna switching control method and device |
| CN101615713A (en) * | 2009-07-31 | 2009-12-30 | 中兴通讯股份有限公司 | A kind of remote antenna device |
| US20120038521A1 (en) * | 2010-08-13 | 2012-02-16 | Yuan Zhu | Configurable common rerfernce signal port for reference signal received power in distributed antenna systems |
| CN102738597A (en) * | 2012-04-26 | 2012-10-17 | 大连海事大学 | Distributed type array antenna system |
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| CN113825090A (en) * | 2021-09-30 | 2021-12-21 | 广州广日电梯工业有限公司 | Wireless communication system and method for elevator |
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Application publication date: 20150909 |