CN103001673A - Broadband distributed antenna system and data communication method - Google Patents
Broadband distributed antenna system and data communication method Download PDFInfo
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- CN103001673A CN103001673A CN2011102651893A CN201110265189A CN103001673A CN 103001673 A CN103001673 A CN 103001673A CN 2011102651893 A CN2011102651893 A CN 2011102651893A CN 201110265189 A CN201110265189 A CN 201110265189A CN 103001673 A CN103001673 A CN 103001673A
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Abstract
An embodiment of the invention provides a broadband distributed antenna system and a data communication method and relates to the technical field of networks. A remote hub is in data communication with remote access units in a free space communication mode. Compared with the mode that all devices in an existing broadband distributed antenna system are connected by laying optical fibers, cables and the like, the data communication method can shorten mounting time and save wiring cost. Additionally, the remote hub and each remote access unit are connected and configured flexibly so as to facilitate technological upgrading and adjustment.
Description
Technical field
The present invention relates to networking technology area, particularly relate to a kind of broadband distributing antenna system and data communications method.
Background technology
Distributing antenna system (DAS:Distributed Antenna System) be one by being distributed in certain building, the network that a plurality of antennas of providing wireless indoor to cover form being provided.The DAS system provides one than the more efficiently Indoor Coverage Solution of small-sized, distributed indoor base station for operator.
Broadband distributing antenna system (DAS) has attracted a lot of concerns recently, because it can utilize a fiber platform unification, that be independent of agreement, the signal of a plurality of frequency bands is assigned to the terminal use.
Existing broadband distributing antenna system generally includes each access unit of primary hub, Remote Line Concentrator and far-end, usually realizes connecting by laying many optical fiber or cable between them.
In implementing process of the present invention, the inventor finds that there are the following problems at least in the prior art, in the distributing antenna system of existing broadband, because when in whole coverage, the laying of carrying out optical fiber, cable between each equipment being connected, there is the very high problem of time and effort consuming, wiring cost, especially the net environment in building, this problem is more outstanding.Simultaneously, exist part circuit is wherein upgraded or adjusted to answer emerging wireless service development trend (such as multiple-input and multiple-output MIMO etc.), all may relate to larger construction.
Therefore, be badly in need of seeking a kind of new broadband distributing antenna system solution, to accelerate the set-up time, to save wiring cost.
Summary of the invention
The embodiment of the invention provides a kind of broadband distributing antenna system and data communications method, to solve the problem that wiring is complicated, cost is high in the distributing antenna system of existing broadband.
For achieving the above object, the embodiment of the invention provides following scheme:
A kind of broadband distributing antenna system comprises primary hub, Remote Line Concentrator and distance connection unit;
Adopt the free-space communication mode to carry out data communication between described Remote Line Concentrator and the distance connection unit.
A kind of broadband distributing antenna system data communications method comprises:
Carry out data communication between primary hub and the Remote Line Concentrator; Adopt the free-space communication mode to carry out data communication between Remote Line Concentrator and the distance connection unit.
According to specific embodiment provided by the invention, following technique effect is disclosed:
In the embodiment of the invention, adopt the free-space communication mode to carry out data communication between Remote Line Concentrator and the distance connection unit, compare by the mode that laying optical fiber, cable etc. are connected with each equipment room in the distributing antenna system of existing broadband, not only can accelerate the set-up time, and save wiring cost.In addition, in the invention process, between Remote Line Concentrator and each distance connection unit to be connected configuration mode flexible, be convenient to upgrading, the adjustment of technology.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The physical layer architecture block diagram of a kind of broadband distributing antenna system that Fig. 1 provides for the embodiment of the invention;
Data downstream transmission schematic diagram in the broadband distributing antenna system that Fig. 2 provides for the embodiment of the invention;
Data upstream transmission schematic diagram in the broadband distributing antenna system that Fig. 3 provides for the embodiment of the invention;
The data downstream transmission method flow chart of the broadband distributing antenna system that Fig. 4 provides for the embodiment of the invention;
The data upstream transmission method flow diagram of the broadband distributing antenna system that Fig. 5 provides for the embodiment of the invention.
Embodiment
For purpose, the feature and advantage that make the embodiment of the invention can become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Referring to Fig. 1, show the physical layer architecture block diagram of a kind of broadband distributing antenna system that the embodiment of the invention provides, wherein, solid line partly represents wire transmission mode, such as optical fiber, cable etc.; Dotted portion represents the free-space communication mode, such as the millimetre-wave attenuator mode and/the horizon communication modes such as free space optical communication mode.
The broadband distributing antenna system that the embodiment of the invention provides comprises primary hub, Remote Line Concentrator and distance connection unit.
Wherein, adopt the free-space communication mode to carry out data communication between Remote Line Concentrator and the distance connection unit.
Need to prove, described free-space communication mode comprise the millimetre-wave attenuator mode and/the horizon communication modes such as free space optical communication mode.
The free space transmission of wireless signal, referring to does not have barrier between the transmitter and receiver, and signal is along the mode of straightline propagation, and such channel is also referred to as sighting distance (line-of-sight, LOS) channel.
Concrete, be provided with free space emission interface and free space receiving interface in the Remote Line Concentrator, accordingly, also be provided with free space receiving interface and free space emission interface in the far-end input unit, be used for the data communication between realization Remote Line Concentrator and the far-end input unit.
In addition, also need to prove, alleged its major function of hub (Hub) of the embodiment of the invention is to broadcast descending multiband RF signal also to converge up multiband RF signal simultaneously, and in the process of transmission and line concentration, do not relate to the demodulation of any radiofrequency signal, completely different with general hub for transmitting baseband signal.And according to the relation of the network level in the present embodiment, can divide into again primary hub (MH:Main Hub) and Remote Line Concentrator (RH:Remote Hub).Primary hub be in this aerial network with the broadband interface of each base transceiver station (BTS:Base Transceiver Station), be responsible for the downlink radio-frequency signal of each base transceiver station is converged and broadcasts to each Remote Line Concentrator, the while also converges from the up radiofrequency signal of each Remote Line Concentrator and is back to each base transceiver station.Remote Line Concentrator is to be responsible for the carrying of the radiofrequency signal in a certain zone and propagation in this aerial network, its function mainly is that the downlink radio-frequency signal from primary hub is broadcast to each distance connection unit (RAU:Remote Access Unit), also will be back to primary hub from the up radiofrequency signal of each distance connection unit simultaneously.
In actual applications, one or more free space emission interfaces and free space receiving interface can be set in each Remote Line Concentrator, accordingly, in each distance connection unit one or more free space emission interfaces and free space receiving interface can be set also.In the Remote Line Concentrator free space emission interface and free space receiving interface can be set respectively, also free space emission interface function and the merging of free space receiving interface function can be arranged in the interface, accordingly, also free space emission interface and free space receiving interface can be set respectively in the distance connection unit, maybe free space emission interface function and the merging of free space receiving interface function can be arranged in the interface.
In one embodiment of the invention, primary hub carries out data communication by the vertical optical fiber of disposing between the floor with the Remote Line Concentrator that is arranged on each floor, certainly, in the practical application, primary hub can also carry out data communication with the Remote Line Concentrator that is arranged on each floor by the vertical cable of disposing between the floor, the embodiment of the invention does not limit the connected mode between primary hub and each Remote Line Concentrator (being communication mode), those skilled in the art can designed, designed, can realize that interconnecting communication gets final product.
Each floor is respectively equipped with Remote Line Concentrator RH; Each Remote Line Concentrator RH adopts the free-space communication mode to carry out data communication with each the distance connection unit that is arranged in the This floor respectively.
Specific, the free space emission interface among the RH is connected on the free space receiving interface of RAU; Free space receiving interface among the RH links to each other with the free space emission interface of RAU.The optional free-space communication technology that realizes this invention framework can be: millimeter wave (MMW:millimeter wave) communication technology and free space optical communication (FSO:Free-space Optics) communication technology etc.Wherein, the frequency of MMW is between 30-300GHz, and FSO can move between the 1550nm at 850nm.The characteristics of above-mentioned two kinds of communication technologys all are: operate in the horizon range, and high bandwidth.
Based on the broadband distributing antenna system that the embodiment of the invention provides, can realize the uplink of data and the downlink transfer of data.
Referring to Fig. 2, data downstream transmission schematic diagram in the broadband distributing antenna system that the embodiment of the invention provides is shown.Descender, Remote Line Concentrator RH is comprised of many transmitting-receivings port of light-electricity conversion, multiband amplification, broadband up-conversion, millimeter wave/free space optical communication.RH is connected with RAU and is connected by sighting distance free space radio transmission technology (millimeter wave or free space optical communication).Distance connection unit R AU is comprised of single transmitting-receiving port, broadband down-conversion, the multiband RF interface of millimeter wave/free space optical communication.
Referring to Fig. 3, data upstream transmission schematic diagram in the broadband distributing antenna system that the embodiment of the invention provides is shown.Ascender, distance connection unit R AU is comprised of single transmitting-receiving port of multiband RF interface, broadband up-conversion, millimeter wave/free space optical communication.RAU is connected with RH and is connected by sighting distance (line-of-sight) free space radio transmission technology (millimeter wave or free space optical communication).Remote Line Concentrator RH is comprised of many transmitting-receivings port, broadband down-conversion, multiband amplification, the electrical-optical conversion of millimeter wave/free space optical communication.
As seen, in the embodiment of the invention, adopt the free-space communication mode to carry out data communication between Remote Line Concentrator and the distance connection unit, compare by the mode that laying optical fiber, cable etc. are connected with each equipment room in the distributing antenna system of existing broadband, not only can accelerate the set-up time, and save wiring cost.In addition, in the invention process, between Remote Line Concentrator and each distance connection unit to be connected configuration mode flexible, be convenient to upgrading, the adjustment of technology.
Based on same inventive concept, the embodiment of the invention also provides a kind of broadband distributing antenna system data communications method, comprises and carries out data communication between primary hub and the Remote Line Concentrator; Adopt the free-space communication mode to carry out data communication between Remote Line Concentrator and the distance connection unit.
Wherein, the free-space communication mode comprise the millimetre-wave attenuator mode and/the horizon communication modes such as free space optical communication mode.
In one embodiment of the invention, each floor is respectively equipped with Remote Line Concentrator; Each Remote Line Concentrator adopts the free-space communication mode to carry out data communication with each the distance connection unit that is arranged in the This floor respectively; Described primary hub carries out data communication by the vertical optical fiber of disposing between the floor with the Remote Line Concentrator that is arranged on each floor.
The broadband distributing antenna system data communications method that the embodiment of the invention provides specifically comprises the downlink transmission method of data and the ascending transmission method of data, below respectively explanation.
Referring to Fig. 4, the data downstream transmission method of broadband distributing antenna system comprises:
S401: primary hub merges the radiofrequency signal of a plurality of frequency ranges of a plurality of base transceiver stations output, carry out the electrical-optical conversion after, deliver to the Remote Line Concentrator that is arranged at each floor by the vertical optical fiber transmission of disposing between the floor;
S402: after each Remote Line Concentrator will carry out from the multi-frequency band radio-frequency signal that described primary hub receives light-electricity conversion and signal amplification processing, multi-band signal is carried out the broadband upconversion process, to the wireless high carrier frequency that presets, be sent to a plurality of distance connections of This floor unit through the free space emission interface;
S403: after the free space receiving interface of each distance connection unit receives wireless high carrier frequency signaling from the Remote Line Concentrator of This floor, carry out the broadband down-converted, be reduced to the multiband RF signal, be transmitted into the wireless terminal user place through the multiband RF interface.
Referring to Fig. 5, the data upstream transmission method of described broadband distributing antenna system comprises:
S501: each distance connection unit will carry out the broadband upconversion process from the multiband RF signal that wireless terminal user receives, and be sent to the Remote Line Concentrator of This floor through the free space emission interface;
S502: after the free space receiving interface of each Remote Line Concentrator receives wireless high carrier frequency signaling from each distance connection unit, it is carried out the broadband down-converted, be reduced to the multiband RF signal, after carrying out the electrical-optical conversion, the vertical optical fiber transmission of disposing is delivered to described primary hub between floor again;
S503: primary hub will carry out from the multiband RF signal that each Remote Line Concentrator receives the conversion of light-electricity, and the radiofrequency signal of a plurality of frequency ranges is sent to each base transceiver station.
Need to prove, in this article, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby not only comprise those key elements so that comprise process, method, article or the equipment of a series of key elements, but also comprise other key elements of clearly not listing, or also be included as the intrinsic key element of this process, method, article or equipment.Do not having in the situation of more restrictions, the key element that is limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
One of ordinary skill in the art will appreciate that all or part of step that realizes in above-described embodiment method is to come the relevant hardware of instruction to finish by program, described program can be stored in the embodied on computer readable Protector.Described Protector, as: ROM/RAM, magnetic disc, CD etc.
More than the present invention is described in detail, this paper has used specific case principle of the present invention and execution mode has been set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for persons skilled in the art, according to thought of the present invention, all will change in specific embodiments and applications.In sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. a broadband distributing antenna system is characterized in that, comprises primary hub, Remote Line Concentrator and distance connection unit;
Adopt the free-space communication mode to carry out data communication between described Remote Line Concentrator and the distance connection unit.
2. system according to claim 1 is characterized in that, described free-space communication mode comprise the millimetre-wave attenuator mode and/the free space optical communication mode.
3. system according to claim 1 is characterized in that,
Be provided with the free space emission interface in the described Remote Line Concentrator, be used for to described distance connection unit transmission data;
Described distance connection is provided with the free space receiving interface in the unit, is used for from described Remote Line Concentrator receive data;
Be provided with the free space receiving interface in the described Remote Line Concentrator, be used for from described distance connection unit receive data;
Described distance connection is located at the free space emission interface in the unit, is used for from described Remote Line Concentrator receive data.
4. system according to claim 3 is characterized in that, each floor is respectively equipped with Remote Line Concentrator; Each Remote Line Concentrator adopts the free-space communication mode to carry out data communication with each the distance connection unit that is arranged in the This floor respectively.
5. each described system is characterized in that according to claim 1-4, and described primary hub carries out data communication by the vertical optical fiber of disposing between the floor with the Remote Line Concentrator that is arranged on each floor.
6. a broadband distributing antenna system data communications method is characterized in that, comprising:
Carry out data communication between primary hub and the Remote Line Concentrator; Adopt the free-space communication mode to carry out data communication between Remote Line Concentrator and the distance connection unit.
7. method according to claim 6 is characterized in that, described free-space communication mode comprise the millimetre-wave attenuator mode and/the free space optical communication mode.
8. method according to claim 6 is characterized in that, each floor is respectively equipped with Remote Line Concentrator; Each Remote Line Concentrator adopts the free-space communication mode to carry out data communication with each the distance connection unit that is arranged in the This floor respectively;
Described primary hub carries out data communication by the vertical optical fiber of disposing between the floor with the Remote Line Concentrator that is arranged on each floor.
9. method according to claim 8 is characterized in that, the data downstream transmission method of described broadband distributing antenna system comprises:
Described primary hub merges the radiofrequency signal of a plurality of frequency ranges of a plurality of base transceiver stations output, carry out the electrical-optical conversion after, deliver to the Remote Line Concentrator that is arranged at each floor by the vertical optical fiber transmission of disposing between the floor;
After each Remote Line Concentrator will carry out from the multi-frequency band radio-frequency signal that described primary hub receives light-electricity conversion and signal amplification processing, multi-band signal is carried out the broadband upconversion process, to the wireless high carrier frequency that presets, be sent to a plurality of distance connections of This floor unit through the free space emission interface;
The free space receiving interface of each distance connection unit carries out the broadband down-converted after receiving wireless high carrier frequency signaling from the Remote Line Concentrator of This floor, is reduced to the multiband RF signal, is transmitted into the wireless terminal user place through the multiband RF interface.
10. method according to claim 8 is characterized in that, the data upstream transmission method of described broadband distributing antenna system comprises:
Each distance connection unit will carry out the broadband upconversion process from the multiband RF signal that wireless terminal user receives, and be sent to the Remote Line Concentrator of This floor through the free space emission interface;
After the free space receiving interface of each Remote Line Concentrator receives wireless high carrier frequency signaling from each distance connection unit, it is carried out the broadband down-converted, be reduced to the multiband RF signal, after carrying out the electrical-optical conversion, the vertical optical fiber transmission of disposing is delivered to described primary hub between floor again;
Described primary hub will carry out from the multiband RF signal that each Remote Line Concentrator receives the conversion of light-electricity, and the radiofrequency signal of a plurality of frequency ranges is sent to each base transceiver station.
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| CN110300416A (en) * | 2019-06-27 | 2019-10-01 | 西安电子科技大学 | Millimeter wave indoor passive covering method |
| CN112738648A (en) * | 2020-11-02 | 2021-04-30 | 杭州电子科技大学 | Distributed underground leather base station system based on centralized power supply |
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Application publication date: 20130327 |