CN101090289B - Communication system and method for extension covering - Google Patents
Communication system and method for extension covering Download PDFInfo
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- CN101090289B CN101090289B CN2007101372904A CN200710137290A CN101090289B CN 101090289 B CN101090289 B CN 101090289B CN 2007101372904 A CN2007101372904 A CN 2007101372904A CN 200710137290 A CN200710137290 A CN 200710137290A CN 101090289 B CN101090289 B CN 101090289B
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Abstract
This invention discloses a communication system and a method for expanding covering spheres, in which, the system includes: a terminal used in generating up-line energetic signals and combining them with RF signals to the up-line signals then to be emitted to an expanding unit, an expanding unit used in amplifying and transmiting the upline signals.
Description
Technical field
The present invention relates to a kind of communication system, relate in particular to the communication system and the network-building method thereof that are used to realize mobile communication extension covering.
Background technology
Along with the fast development in mobile communication market, surge of mobile subscriber's quantity and distribution are more and more wider, and the user improves more to the requirement of network quality simultaneously.Therefore, the coverage and the service quality of mobile communications network are more and more paid close attention to by operator, how to make full use of existing network and receive more user, realize that with lower input the comparatively covering utilization of wide area more and more obtains paying close attention to.For wide rural areas, because the user disperses, the unit telephone traffic is lower, base station density is less, might exist the blind area of covering.And for the urban area, because skyscraper is more and more, these architectural scale are big, body of wall is thick, finishing and complicated at interval, and the mobile communication signal is had very strong shielding action, depend merely on outdoor base station system and are difficult to realize indoor preferably covering and service.
For top all situations, operator needs to consider cover or provide application service to it according to the consideration of aspects such as itself brand, benefit, at this moment adopt the repeater extend covering mode since its implement convenient, low price is comparatively simple a kind of solution.But the mode that adopts the repeater to extend covering has the defective of itself, and one of defective is raising the receiver ground noise level of donor base station.This is because the thermal noise that repeater itself exists, after these noises are amplified by repeater or trunk amplifier, through and donor base station between path loss after still can form stronger up background noise interference at the receiving terminal of alms giver sector.The just very possible donor base station receiver noise level that improves in the noise stack back of this noise and donor base station receiver reduces the donor base station receiver sensitivity, and the donor base station coverage is dwindled, and has influence on original coverage planning.
We are that example illustrates with the CDMA covering system, we suppose that up link and down link are symmetrical between CDMA donor base station and the repeater, be that uplink downlink has identical antenna gain, space loss and repeater gain etc., we just can think that the repeater receiver just equals the poor of repeater transmitting power and donor base station transmitting power to the gain of donor base station receiver like this; Suppose CDMA donor base station transmitting power P
BTSBe 45dBm, repeater transmitting power P
REPEATERBe 40dBm, repeater noise factor NF
REPEATERBe 10dB, we just can calculate the repeater thermal noise through oppositely amplifying the power level P that the back arrives the base station like this
N:
P
N＝N
0+NF
REPEATER+P
REPEATER-P
BTS
Wherein: N
0Be the thermal noise under the CDMA bandwidth, its value is-113dBm/1.23MHz.
According to top hypothesis, we can calculate the noise power that arrives base station receiver, even that is to say in this overlay area does not have under the situation of telephone traffic etc., this repeater still can be higher than the noise of the nearly 5dB of thermal noise level to the base station receiver contribution.
Certainly in actual applications, when adopting the compartment system of repeater mode, can take to reduce methods such as direct end uplink transmitting power, reduction direct end uplink link gain, reduce its noise jamming, but inevitably had influence on the effect that covers so again donor base station; We know that these noises have cumulative effect simultaneously, if adopted a fairly large number of words in repeater, its influence to the donor base station ground noise is still very big.
Based on top reason, it is inevitable to the interference of donor base station to adopt the repeater to add the extension coverage mode of trunk amplifier, certainly will influence original coverage planning like this; If the covering that the mode that adopting increases little base station or base station is extended, though do the covering that can realize the zone like this, and can realize the increase of capacity, but certainly will increase considerably operating cost of operator like this, and a lot of coverage hole does not need to consider the problem of capacity yet.
Therefore, need a kind of being used to extend the solution that covers communication network, can solve the problem in the above-mentioned correlation technique.
Summary of the invention
The objective of the invention is to keep under the situation of advantage such as repeater or trunk amplifier be cheap, flexible, what overcome that it has causes shortcomings such as background noise interference to donor base station.
According to an aspect of the present invention, provide a kind of communication system that is used to extend covering, having comprised: terminal is used to produce up enable signal, and up enable signal and radiofrequency signal is synthesized upward signal, and upward signal is emitted to expanding element; And expanding element, being used under the described up enable signal effective situation of basis from described terminal, the described upward signal after described upward signal is amplified and will amplify is launched.
This system also comprises: coupling unit is used for carrying out the signal coupling between terminal and merit subdivision; And the merit subdivision, be used between coupling unit and expanding element, carrying out power division.
Above-mentioned terminal comprises: control unit is used to produce up enable signal and up enable signal is sent to radio frequency unit; Radio frequency unit is used for radiofrequency signal being sent to pilot signal dividing compound module under the effective situation of up enable signal; Pilot signal divides compound module, is used under the control of control unit up enable signal and radiofrequency signal being synthesized upward signal, and upward signal is launched by antenna.
Above-mentioned expanding element comprises: pilot signal divides compound module, be connected the up input of expanding element, the upward signal that is used for the self terminal in future inputs to first duplexer module, and extracts up enable signal from upward signal, and up enable signal is inputed to the power supply monitoring module; First duplexer module is used for from dividing the upward signal of compound module to extract radiofrequency signal from pilot signal, and radiofrequency signal is sent to the upstream amplifier module; The power supply monitoring module is used for the state according to up enable signal, is controlled to be the energising of upstream amplifier module; The upstream amplifier module be used to amplify the radiofrequency signal from first duplexer module, and the radiofrequency signal after will amplifying exports second duplexer module to; Second duplexer module is used for being synthesized by the radiofrequency signal that the upstream amplifier module is amplified the upward signal line output of going forward side by side; And descending amplifier module, be used for amplifying from the radiofrequency signal that receives downstream signal by expanding element and separate, and export first duplexer module to by second duplexer.
Wherein, under the effective situation of up enable signal, the power supply monitoring module controls makes the energising of upstream amplifier module, expanding element control is amplified upward signal, and under the invalid situation of up enable signal, make the outage of upstream amplifier module, expanding element control is not amplified upward signal; Wherein expanding element comprises one of repeater and relay amplifier at least; And descending amplifier module is worked all the time.
According to another aspect of the present invention, provide a kind of communication means that is used to extend covering, may further comprise the steps: step S202, terminal is to the expanding element transmit uplink signal; Step S204, expanding element extract up enable signal from upward signal, and the radiofrequency signal in the upward signal is inputed to the upward signal amplification module; Step S206, under the effective situation of up enable signal, control upward signal amplification module amplifies radiofrequency signal; And step S208, the radiofrequency signal after amplifying is synthesized upward signal, and launch.
Step S206 may further comprise the steps: under the invalid situation of up enable signal, make the outage of upward signal amplification module, the upward signal amplification module does not amplify upward signal.
The present invention compares with the scheme that other adopt the repeater to extend covering; kept it with low cost; lay advantages such as convenient; when the extension that has realized the weak signal zone covers; the substrate background noise of having avoided donor base station is formed disturbs; can not impact, protect original coverage planning original network coverage situation.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 illustrates the block diagram that is used to extend the communication system of covering according to of the present invention;
Fig. 2 illustrates the flow chart that is used to extend the communication means of covering according to of the present invention;
Fig. 3 is the block diagram that illustrates according to the application terminal of the embodiment of the invention; And
Fig. 4 is the block diagram that illustrates according to the repeater of the embodiment of the invention.
Embodiment
Describe embodiments of the invention in detail below in conjunction with accompanying drawing.
Fig. 1 illustrates the block diagram that is used to extend the communication system of covering according to of the present invention.With reference to Fig. 1, the communication system 100 that is used to extend covering according to the present invention comprises: terminal 102 is used to produce up enable signal, and up enable signal and radiofrequency signal is synthesized upward signal, and upward signal is emitted to expanding element; And expanding element 104, being used under the described up enable signal effective situation of basis from described terminal, the described upward signal after described upward signal is amplified and will amplify is launched.
This system also comprises: coupling unit 106 is used for carrying out the signal coupling between terminal and merit subdivision; And merit subdivision 108, be used between coupling unit and expanding element, carrying out power division.
Above-mentioned expanding element comprises: pilot signal divides compound module 104-2, be connected the up input of expanding element, being used in the future, the upward signal of self terminal inputs to first duplexer module, and from upward signal, extract up enable signal, and up enable signal is inputed to the power supply monitoring module; The first duplexer module 104-4 is used for from dividing the upward signal of compound module to extract radiofrequency signal from pilot signal, and radiofrequency signal is sent to the upstream amplifier module; Power supply monitoring module 104-6 is used for the state according to up enable signal, is controlled to be the energising of upstream amplifier module; Upstream amplifier module 104-8 be used to amplify the radiofrequency signal from first duplexer module, and the radiofrequency signal after will amplifying exports second duplexer module to; The second duplexer module 104-10 is used for being synthesized by the radiofrequency signal that the upstream amplifier module is amplified the upward signal line output of going forward side by side; And descending amplifier module 104-12, be used for amplifying from the radiofrequency signal that receives downstream signal by expanding element and separate, and export first duplexer module to by second duplexer.
Wherein, under the effective situation of up enable signal, the power supply monitoring module controls makes the energising of upstream amplifier module, expanding element control is amplified upward signal, and under the invalid situation of up enable signal, make the outage of upstream amplifier module, expanding element control is not amplified upward signal; Wherein expanding element comprises one of repeater and relay amplifier at least; And descending amplifier module is worked all the time.
Fig. 2 illustrates the flow chart that is used to extend the communication means of covering according to of the present invention.With reference to Fig. 2, the communication means that is used to extend covering according to the present invention may further comprise the steps: step S202, and terminal is to the expanding element transmit uplink signal; Step S204, expanding element extract up enable signal from upward signal, and the radiofrequency signal in the upward signal is inputed to the upward signal amplification module; Step S206, under the effective situation of up enable signal, control upward signal amplification module amplifies radiofrequency signal; And step S208, the radiofrequency signal after amplifying is synthesized upward signal, and launch.
Step S206 may further comprise the steps: under the invalid situation of up enable signal, make the outage of upward signal amplification module, the upward signal amplification module does not amplify upward signal.
Describe one embodiment of the present of invention in detail below with reference to Fig. 1, Fig. 3 and Fig. 4.
Referring again to Fig. 1, Fig. 1 has illustrated a kind of execution mode according to communication system of the present invention, therefrom can see, its implementation and other indoor distributed systems are also inequality, general indoor distributed system only is to adopt the relaying of equipment realization wireless communication signals such as repeater to amplify, and in this communication system, comprised application terminal 102, repeater (expanding element) 104, antenna 112, merit subdivision 108, coupling unit 106 and corresponding radio frequency cable 110 etc.In actual applications, antenna receives the downstream signal that donor base station is sent, through delivering to application terminal 102 after 104 amplifications of repeater, and the upward signal of application terminal 102 is radiated to donor base station by antenna 112 after amplifying through repeater 104, realizes the air interface of this communication system and donor base station like this.And, needing each component devices to cooperatively interact in order to realize the advantage of this communication system, this is illustrated in the introduction of Fig. 3 and Fig. 4.
Fig. 3 is the block diagram that illustrates according to the application terminal of the embodiment of the invention.With reference to Fig. 3, in the present embodiment, base band and main control unit 102-2 finish the Base-Band Processing of wireless communication signals of application terminal and the functions such as control of interface; In the course of the work, base band and main control unit 102-2 by send up enable signal to radio frequency unit 102-4 so that its inner ascending power amplifier work, simultaneously, divide compound module 102-6 to make it to close the road by pilot signal with radiofrequency signal, be sent to repeater 104 by radio frequency cable 110, repeater 104 is according to the upstream amplifier module 104-10 of this instruction unpack inside, cooperate the emission work finish upward signal, separately upstream amplifier module was closed according to the state of up enable signal in application terminal 102 and repeater 104 after emission was finished.
Fig. 4 is the block diagram that illustrates according to the repeater of the embodiment of the invention.With reference to Fig. 4, the repeater among this embodiment comprises that pilot signal divides compound module 104-2, upstream amplifier module 104-8, descending amplifier module 104-12, duplexer module 104-4 and parts such as 104-10, power supply monitoring module 104-6; Here pilot signal divides the pilot signal of compound module 104-2 and application terminal 102 to divide the effect of compound module 102-6 the same, mainly is to make the separation of up enable signal reach synthetic in order to realize application terminal 102 pilot signals must transmit on radio frequency cable; That duplexer module 104-4 and 104-10 mainly finish is up, downstream signal separate, close road and filtering etc.; That upstream amplifier module 104-8, descending amplifier module 104-12 mainly finish is up, the low noise of downstream signal amplifies and power amplification etc.; Power supply monitoring module 104-6 is responsible for functions such as repeater 104 complete machines power supply and Working Status Monitoring.In the course of the work, descending amplifier module 104-12 is in running order always, the donor base station that receives via antenna transmits through duplexer module 104-10 separation, through being delivered to each application terminal 102 after the descending amplifier module 104-12 amplification, can realize its receiving function at any time to guarantee each application terminal 102.The operating state of upstream amplifier module is then controlled by the up enable signal of application terminal 102, power supply monitoring module 104-6 is by detecting the up enable signal that pilot signal divides compound module 104-2 to extract, if this signal is effective, then upstream amplifier module 104-8 is opened in control, makes it the up emission work of fit applications terminal 102; Otherwise close the upstream amplifier module, to avoid influencing the donor base station receiver performance.
Above-mentioned communication system can have multiple for the occupation mode of repeater and application terminal, as adopting multistage repeater according to the scale of overlay area, adopting mode that a plurality of application terminals link to each other or the like.
Above-mentioned communication system differs and establishes a capital and need use for the use flexible configuration of coupler, power splitter, also not necessarily is confined to these two kinds, but should make this device possess the transfer function of terminal monitoring signal when being to use.
The present invention compares with the scheme that other adopt the repeater to extend covering; kept it with low cost; lay advantages such as convenient; when the extension that has realized the weak signal zone covers; the substrate background noise of having avoided donor base station is formed disturbs; can not impact, protect original coverage planning original network coverage situation.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a communication system that is used to extend covering is characterized in that, comprising:
Terminal is used to produce up enable signal, and described up enable signal and radiofrequency signal are synthesized upward signal, and described upward signal is emitted to expanding element; And
Described expanding element is used under the described up enable signal effective situation of basis from described terminal, and the described upward signal after described upward signal is amplified and will amplify is launched;
Wherein, described terminal comprises: control unit is used to produce up enable signal and described up enable signal is sent to radio frequency unit; Radio frequency unit is used for described radiofrequency signal being sent to pilot signal dividing compound module under the effective situation of described up enable signal; Described pilot signal divides compound module, is used under the control of described control unit, described up enable signal and described radiofrequency signal is synthesized described upward signal, and described upward signal is launched by antenna.
2. communication system according to claim 1 is characterized in that, also comprises:
Coupling unit is used for carrying out the signal coupling between described terminal and merit subdivision; And
Described merit subdivision is used for carrying out power division between described coupling unit and described expanding element.
3. the communication system of stating according to claim 1, it is characterized in that, under the effective situation of described up enable signal, described expanding element control is amplified described upward signal, and under the invalid situation of described up enable signal, described expanding element control is not amplified described upward signal.
4. communication system according to claim 1 is characterized in that described expanding element comprises one of repeater and relay amplifier at least.
5. communication system according to claim 1 is characterized in that, described expanding element comprises:
Pilot signal divides compound module, be connected the up input of described expanding element, be used for and input to first duplexer module from the described upward signal of described terminal, and from described upward signal, extract described up enable signal, and described up enable signal is inputed to the power supply monitoring module;
First duplexer module is used for from dividing the described upward signal of compound module to extract radiofrequency signal from described pilot signal, and described radiofrequency signal is sent to the upstream amplifier module;
The power supply monitoring module is used for the state according to described up enable signal, is controlled to be described upstream amplifier module energising;
Described upstream amplifier module be used to amplify the described radiofrequency signal from described first duplexer module, and the described radiofrequency signal after will amplifying exports second duplexer module to;
Described second duplexer module is used for being synthesized by the described radiofrequency signal that described upstream amplifier module is amplified the upward signal line output of going forward side by side; And
Descending amplifier module is used for amplifying from the radiofrequency signal that is received downstream signal by described expanding element and separate by described second duplexer, and exports described first duplexer module to.
6. communication system according to claim 5 is characterized in that, under the effective situation of described up enable signal, described power supply monitoring module controls makes described upstream amplifier module energising, otherwise makes described upstream amplifier module outage.
7. communication system according to claim 5 is characterized in that, described descending amplifier module is worked all the time.
8. a communication means that is used to extend covering is characterized in that, may further comprise the steps:
Step S202, terminal is to the expanding element transmit uplink signal;
Step S204, described expanding element extract up enable signal from described upward signal, and the radiofrequency signal in the described upward signal is inputed to the upward signal amplification module;
Step S206 under the effective situation of described up enable signal, controls described upward signal amplification module described radiofrequency signal is amplified; And
Step S208 synthesizes upward signal with the described radiofrequency signal after amplifying, and launches;
Wherein, described terminal produces in the following manner to the described upward signal of described expanding element emission: the control unit of described terminal produces up enable signal and described up enable signal is sent to radio frequency unit, described radio frequency unit is under the effective situation of described up enable signal, described radiofrequency signal is sent to pilot signal divides compound module, described pilot signal divides compound module under the control of described control unit, and described up enable signal and described radiofrequency signal are synthesized described upward signal.
9. communication means according to claim 8 is characterized in that, described step S206 may further comprise the steps:
Under the invalid situation of described up enable signal, make described upward signal amplification module outage, described upward signal amplification module does not amplify described upward signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101372904A CN101090289B (en) | 2007-07-18 | 2007-07-18 | Communication system and method for extension covering |
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| CN2007101372904A CN101090289B (en) | 2007-07-18 | 2007-07-18 | Communication system and method for extension covering |
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| CN101090289A CN101090289A (en) | 2007-12-19 |
| CN101090289B true CN101090289B (en) | 2011-06-22 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103067686A (en) * | 2012-12-17 | 2013-04-24 | 苏州云普通讯技术有限公司 | Upload amplified coaxial Ethernet access terminal device |
| CN105376763A (en) * | 2015-11-23 | 2016-03-02 | 中国联合网络通信有限公司西安市分公司 | A micro-area communication system, and an uplink noise interference suppression and energy-saving method thereof |
| CN112804691A (en) * | 2021-01-29 | 2021-05-14 | 京信网络***股份有限公司 | Indoor distribution system and signal transmission method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2788459Y (en) * | 2004-09-15 | 2006-06-14 | 宇龙计算机通信科技(深圳)有限公司 | PHS mobile communication repeater |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2788459Y (en) * | 2004-09-15 | 2006-06-14 | 宇龙计算机通信科技(深圳)有限公司 | PHS mobile communication repeater |
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