CN103037384A - System of covering signals by means of single cable transmission and multiple input multiple output (MIMO) technique, and networking method of covering signals by means of single cable transmission and MIMO technique - Google Patents

Abstract

The invention relates to a system of covering signals by means of single cable transmission and the multiple input multiple output (MIMO) technique, and a networking method of covering the signals by means of the single cable transmission and the MIMO technique. The system comprises a near-end small cell group, near-end combiner units and far-end covering units. The near-end small cell group is used for receiving and sending communication signals capable of supporting MIMO networking. The near-end combiner units are used for combining the communication signals supported by the near-end small cell group and community antenna television (CATV) signals, and then the single cable transmission is achieved through CATV wire cables. The far-end covering units are used for shunting combining signals transmitted from the near-end combiner units, wherein the CATV signals are transmitted to the televisions through the CATV wire cables, and the remaining communication signals are output to MIMO antennas for signal coverage. According to the system of covering the signals by means of the single cable transmission and the MIMO technique, and the networking method of covering the signals by means of the single cable transmission and the MIMO technique, signal single cable transmission of the small cell group can be achieved by means of the existing CATV wire cables no matter whether signal frequency of a communication system supported by the small cell group is included in an frequency range occupied by the CATV signals or not, and the high-speed, high-quality and accurate signal coverage is achieved by means of the MIMO antennas of the plurality of far-end covering units at a far end.

Description

Adopt co-cable transmission and MIMO to carry out system and network-building method that signal covers

Technical field

The present invention relates to the wireless communication signals Covering domain, relate in particular to a kind of co-cable transmission and MIMO technology of adopting and carry out small base station (Small Cell) system and network-building method that signal covers.

Background technology

In recent years, the speed fast continual development that once updates with per 10 years (even shorter time) of mobile radio communication network.Along with the fast development of mobile Internet, the user has higher requirement to the data rate of mobile radio communication network, has further promoted development and the evolution of wide-band mobile communication network.In China, 3G has just entered Rapid development stage, and large-scale 4G network test launches.Yet, even if having the support of 4G technology, because increasing of indoor user, especially blocking and the wall loss of the increasing of indoor data user, building, and the factors such as spectral bandwidth and interference-limited, cause single macrocellular arrange net pattern oneself through not satisfying the demand of user's high speed seamless access.Therefore, industry is needed a kind of solution that can effectively solve indoor covering problem and capacity problem badly.Small base station of the present invention (Small Cell) has the characteristics such as low-power consumption, self-organizing, can help well operator to realize indoor arranging net, and reduces simultaneously the operation maintenance expense of network, can greatly promote popularizing and development of communications industry new technology.

At present, carrying out the difficulty that indoor covering exists coordination aspect and construction aspect by laying the special-purpose radio-frequency cable, therefore signal of communication is coupled to and has cable and carry out the co-cable transmission covering of registering one's residence, is a very practical method.See that from the perspective of policy country accelerates to advance " integration of three networks " (telecommunications network, computer network, cable television network) process, the fusion of many networks has also become following information industry development direction.

The MIMO technology is MIMO technique, in order to improve power system capacity, follow-on WiMAX mobile communication system will adopt the MIMO technology, namely places a plurality of antennas at the base station end, also place a plurality of antennas at travelling carriage, form the MIMO communication link between base station and the travelling carriage.The WiMAX mobile communication system of using MIMO technique can be divided into two large classes from many antennas laying method of base station end: a class is that a plurality of antenna for base station concentrate arrangement to form aerial array, is positioned over coverage cell, and this class can be called centralized MIMO; Another kind of is that a plurality of antennas of base station disperse to be placed on coverage cell, can be called distributed MIMO.Utilize the MIMO technology can improve the capacity of channel, the while also can be improved the reliability of channel, reduces the error rate.

The present invention expands the use scenes of small base station in conjunction with co-cable transmission technology and MIMO technology, has certain creativeness, practicality and perspective.

Summary of the invention

The purpose of this invention is to provide a kind of co-cable transmission and MIMO of adopting and carry out the system that signal covers, no matter whether can realize the signal frequency of the communication standard that the small base station group is supported drops in the shared frequency range of CATV signal, can utilize existing CATV cable to realize the signal co-cable transmission of small base station group, and can accurately cover in the high-speed high-quality amount that the MIMO antenna of far-end by a plurality of far-end capping units carries out signal.

The present invention adopts following scheme to realize: a kind of co-cable transmission and MIMO of adopting carries out the system that signal covers, and it is characterized in that: comprise

One near-end small base station group, described near-end small base station group one end is connected with the operator core net, and the other end has a plurality of signal transmitting and receiving ports, supports the signal of communication of MIMO networking in order to transmitting-receiving;

A plurality of near-end combiner units close the road for the CATV signal of the CATV power splitter output that receives the CATV bus and the signal of communication that described near-end small base station group is supported;

A plurality of far-end capping units, the described near-end combiner unit CATV cable of respectively hanging oneself is connected with each self-corresponding described far-end capping unit; This far-end capping unit passes through the CATV cable transmission to TV with the CATV signal that receives, and described signal of communication is exported to the MIMO antenna.

In an embodiment of the present invention, described near-end small base station group one end is to link to each other with the core net of operator by the broadband backhaul mode.

In an embodiment of the present invention, described near-end small base station group comprises small base station protocol process module and the MIMO processing module that connects successively, the input of described small base station protocol process module is as the input of this near-end combiner unit, and the output of described MIMO processing module is described signal transmitting and receiving port.

In an embodiment of the present invention, described MIMO processing module is with frequency conversion function, when the signal frequency that this near-end small base station winding is received dropped in the shared frequency range of CATV signal, described MIMO processing module can be received and dispatched this signal frequency conversion to a certain idle frequency range again.

In an embodiment of the present invention, also comprise a trapper, before described trapper is arranged at described CATV power splitter, be used for the signal outside the filtering CATV frequency range.

Another object of the present invention provides a kind of co-cable transmission and MIMO of adopting and carries out the network-building method that signal covers, and it is characterized in that: comprise down direction and up direction;

The processing mode of described down direction is:

One near-end small base station group is provided, and an end of this this near-end small base station group connects the core net of operator, and the multiple signals of MIMO antenna networking are supported in other end output; If when the communication signal frequency of supporting drops in the shared frequency range of CATV signal, the MIMO processing module in the near-end small base station group is exported after then needing signal of communication to be converted to a certain idle frequency range first again; A plurality of near-end combiner units close the road with the CATV signal that the CATV power splitter is exported respectively with the multichannel communication signal of near-end small base station group output, will close the road signal by the CATV cable again and transfer to corresponding far-end capping unit; This far-end capping unit carries out shunt with the signal that receives, wherein the CATV signal passes through the CATV cable transmission to TV, described multichannel communication signal is then exported to respectively the MIMO antenna, if signal of communication has through frequency-conversion processing in near-end small base station group, then need to export to again the MIMO antenna after the frequency conversion reduction;

The processing mode of described up direction is:

Described far-end capping unit will from the MIMO antenna reception to the multichannel communication signal, close respectively the road with the CATV signal that transmits in the CATV cable, when if the frequency of signal of communication drops in the shared frequency range of CATV signal, frequency-variable module in the far-end capping unit closes the road with the CATV signal after then needing first signal of communication to be converted to a certain idle frequency range again, close signal behind the road by CATV cable co-cable transmission to the near-end combiner unit; The near-end combiner unit carries out shunt with the signal that receives to be transmitted, and CATV signal wherein returns by original CATV cable, and the multichannel communication signal then transfers to near-end small base station group; After processing the multichannel communication signal that receives, near-end small base station group is transferred to the core net of operator, if these multichannel communication signals have through frequency-conversion processing in the far-end capping unit, then the frequency-variable module in the near-end small base station group can at first with its respectively frequency conversion reduction, be processed, transmit again.

In an embodiment of the present invention, described near-end small base station group is to link to each other with the core net of operator by the broadband backhaul mode.

In an embodiment of the present invention, the frequency range of described CATV signal is 5-860MHz.

In an embodiment of the present invention, described idle frequency range be frequency be higher than 860MHz and not with the afoul available frequency band of described communication signal frequency band.

In an embodiment of the present invention, before described CATV power splitter, one trapper is set, is used for the signal outside the filtering CATV frequency range.

Beneficial effect of the present invention is exactly, cover by the high-quality that signal and the common cable of original CATV cable of small base station are registered one's residence transmission and can also be used the MIMO antenna sets to carry out signal, not only widen the application scenarios of small base station, and met the growth requirement of following LTE communication.Therefore, the present invention has certain creativeness, practicality and perspective.

Description of drawings

Fig. 1 is system architecture diagram of the present invention.

Fig. 2 is that the internal main of near-end small base station group of the present invention is wanted module map.

Fig. 3 is the down direction schematic flow sheet of method of the present invention.

Fig. 4 is the up direction schematic flow sheet of method of the present invention.

Embodiment

The present invention will be further described below in conjunction with drawings and Examples.

Present embodiment provides a kind of co-cable transmission and MIMO of adopting to carry out the system that signal covers, it is characterized in that: comprise a near-end small base station group, described near-end small base station group one end is connected with the operator core net, the other end has a plurality of signal transmitting and receiving ports, supports the signal of communication of MIMO networking in order to transmitting-receiving; A plurality of near-end combiner units close the road for the CATV signal of the CATV power splitter output that receives the CATV bus and the signal of communication that described near-end small base station group is supported; A plurality of far-end capping units, the described near-end combiner unit CATV cable of respectively hanging oneself is connected with each self-corresponding described far-end capping unit; This far-end capping unit passes through the CATV cable transmission to TV with the CATV signal that receives, and described signal of communication is exported to the MIMO antenna.

Concrete, see also Fig. 1 and Fig. 2, among the figure, the present embodiment system comprises a kind of small base station system that adopts co-cable transmission and MIMO technology to carry out the signal covering, it comprises near-end small base station group, near-end combiner unit and far-end capping unit: wherein, near-end small base station group is comprised of small base station protocol process module, MIMO processing module etc.The one end links to each other with the core net of operator by modes such as broadband backhaul, and the other end has a plurality of signal transmitting and receiving ports, is used for the signal of communication that transmitting-receiving can be supported the MIMO networking.The MIMO processing module is with frequency conversion function, if when the signal frequency of the communication standard of supporting drops in the shared frequency range of CATV signal, the MIMO processing module is received and dispatched after signal of communication can being converted to a certain idle frequency range again.The near-end combiner unit, then signal of communication and CATV television signal combining for near-end small base station group is supported carry out co-cable transmission by the CATV cable; Perhaps, be used for the road signal that closes that comes from the transmission of far-end capping unit is carried out the shunt forwarding.The far-end capping unit, be used for closing the road signal to what transmit from the near-end combiner unit along separate routes, wherein the CATV signal passes through the CATV cable transmission to TV, the residue signal of communication is exported to the MIMO antenna, if signal of communication has through frequency-conversion processing in near-end small base station group, then need to export to again the MIMO antenna after the frequency conversion reduction; Perhaps, be used for the signal of communication that receives from the MIMO antenna end and the CATV signal that transmits from the CATV cable are closed the road, if signal of communication drops in the frequency range of CATV, close the road with the CATV signal again after then needing to be converted to idle frequency range by frequency-variable module first.The last road signal that closes carries out common cable passback by the CATV cable.

In addition, a trapper is installed before the power splitter of CATV bus, is used for the signal outside the filtering CATV frequency range, realize further reducing mobile communication signal to the effect of original CATV line influence.

In addition, present embodiment also provides a kind of co-cable transmission and MIMO of adopting to carry out the network-building method that signal covers, and it is characterized in that: comprise down direction and up direction;

The processing mode of described down direction is:

One near-end small base station group is provided, and an end of this this near-end small base station group connects the core net of operator, and the multiple signals of MIMO antenna networking are supported in other end output; If when the communication signal frequency of supporting drops in the shared frequency range of CATV signal, the MIMO processing module in the near-end small base station group is exported after then needing signal of communication to be converted to a certain idle frequency range first again; A plurality of near-end combiner units close the road with the CATV signal that the CATV power splitter is exported respectively with the multichannel communication signal of near-end small base station group output, will close the road signal by the CATV cable again and transfer to corresponding far-end capping unit; This far-end capping unit carries out shunt with the signal that receives, wherein the CATV signal passes through the CATV cable transmission to TV, described multichannel communication signal is then exported to respectively the MIMO antenna, if signal of communication has through frequency-conversion processing in near-end small base station group, then need to export to again the MIMO antenna after the frequency conversion reduction;

The processing mode of described up direction is:

Described far-end capping unit will from the MIMO antenna reception to the multichannel communication signal, close respectively the road with the CATV signal that transmits in the CATV cable, when if the frequency of signal of communication drops in the shared frequency range of CATV signal, frequency-variable module in the far-end capping unit closes the road with the CATV signal after then needing first signal of communication to be converted to a certain idle frequency range again, close signal behind the road by CATV cable co-cable transmission to the near-end combiner unit; The near-end combiner unit carries out shunt with the signal that receives to be transmitted, and CATV signal wherein returns by original CATV cable, and the multichannel communication signal then transfers to near-end small base station group; After processing the multichannel communication signal that receives, near-end small base station group is transferred to the core net of operator, if these multichannel communication signals have through frequency-conversion processing in the far-end capping unit, then the frequency-variable module in the near-end small base station group can at first with its respectively frequency conversion reduction, be processed, transmit again.

The frequency range of above-mentioned CATV signal is 5-860MHz.

Above-mentioned idle frequency range be frequency be higher than 860MHz and not with the afoul available frequency band of other communication standard signal frequency range.

Please continue referring to referring to figs. 1 to Fig. 4, in this implementation process, take the LTE signal of communication as example.

System configuration comprises near-end small base station group, near-end combiner unit and far-end capping unit as shown in Figure 1; Wherein, near-end small base station group is comprised of the protocol process module of LTE standard and MIMO processing module etc., as shown in Figure 2.The one end links to each other with the core net of operator by modes such as broadband backhaul, and the other end has a plurality of signal transmitting and receiving ports, is used for the signal of communication that transmitting-receiving can be supported the MIMO networking.Because the employed frequency range of LTE standard is not overlapping with CATV signal frequency range, thus do not need to adopt the method for frequency-conversion processing, can be directly and the near-end combiner unit receive and dispatch multichannel LTE signal.

The near-end combiner unit, then LTE signal of communication and CATV television signal combining for near-end small base station group is sent carry out co-cable transmission by the CATV cable; Perhaps, be used for the road signal that closes that comes from the transmission of far-end capping unit is carried out the shunt forwarding.

The far-end capping unit, be used for closing the road signal to what transmit from the near-end combiner unit along separate routes, wherein the CATV signal passes through the CATV cable transmission to TV, remaining LTE signal of communication is directly exported to the MIMO antenna, according to the difference of application scenarios, aerial position, can adopt centralized MIMO networking mode or distributed MIMO networking mode; Perhaps, be used for the LTE signal of communication that receives from the MIMO antenna end and the CATV signal that transmits from the CATV cable are closed the road, the last road signal that closes carries out common cable passback by the CATV cable.

The present invention also provides a kind of co-cable transmission and MIMO technology of adopting to carry out the small base station network-building method that signal covers, no matter whether the method can realize the signal frequency of the communication standard that the small base station group is supported and drop in the shared frequency range of CATV signal, can utilize existing CATV cable to realize the signal co-cable transmission of small base station group, and can accurately cover in the high-speed high-quality amount that the MIMO antenna of far-end by a plurality of far-end capping units carries out signal.

Further, as shown in Figure 3, down direction the method comprises:

Take the small base station of supporting the LTE standard as example.One end of near-end small base station group links to each other with the core net of operator by modes such as broadband backhaul, and the multichannel LTE signal of MIMO antenna networking is supported in other end output.Because the employed frequency range of LTE standard is not overlapping with CATV signal frequency range, so do not need to adopt the method for frequency-conversion processing, can directly multichannel LTE signal be issued respectively several near-end combiner units; A plurality of near-end combiner units close the road with the CATV signal respectively with the multichannel LTE signal of near-end small base station group output, will close the road signal by the CATV cable again and transfer to the far-end capping unit; A plurality of far-end capping units carry out shunt with the signal that receives respectively, wherein the CATV signal passes through the CATV cable transmission to TV, remaining multichannel LTE signal is then exported to respectively the MIMO antenna, if signal of communication has through frequency-conversion processing in near-end small base station group, then need to export to again the MIMO antenna after the frequency conversion reduction, according to the difference of application scenarios, aerial position, can adopt centralized MIMO networking mode or distributed MIMO networking mode.

Further, as shown in Figure 4, up direction the method comprises:

The far-end capping unit will from the MIMO antenna reception to multichannel LTE signal, close respectively the road with the CATV signal that transmits in the CATV cable, because the employed frequency range of LTE standard is not overlapping with CATV signal frequency range, so do not need to adopt the method for frequency-conversion processing, close signal behind the road by CATV cable co-cable transmission to the near-end combiner unit; The near-end combiner unit carries out shunt with the signal that receives to be transmitted, and CATV signal wherein returns by original CATV cable, and multichannel LTE signal then transfers to near-end small base station group; After processing the multichannel LTE signal that receives, near-end small base station group is transferred to the core net of operator by broadband backhaul.

The present invention is not limited to above-mentioned execution mode, and anyone can draw other various forms of employing co-cable transmissions under enlightenment of the present invention and the MIMO technology is carried out small base station system and the network-building method that signal covers.All equalizations of doing according to the present patent application claim change and modify, and all should belong to covering scope of the present invention.

Claims (10)

1. one kind is adopted co-cable transmission and MIMO to carry out the system that signal covers, and it is characterized in that: comprise

One near-end small base station group, described near-end small base station group one end is connected with the operator core net, and the other end has a plurality of signal transmitting and receiving ports, supports the signal of communication of MIMO networking in order to transmitting-receiving;

A plurality of near-end combiner units close the road for the CATV signal of the CATV power splitter output that receives the CATV bus and the signal of communication that described near-end small base station group is supported;

A plurality of far-end capping units, the described near-end combiner unit CATV cable of respectively hanging oneself is connected with each self-corresponding described far-end capping unit; This far-end capping unit passes through the CATV cable transmission to TV with the CATV signal that receives, and described signal of communication is exported to the MIMO antenna.

2. employing co-cable transmission according to claim 1 and MIMO carry out the system that signal covers, and it is characterized in that: described near-end small base station group one end is to link to each other with the core net of operator by the broadband backhaul mode.

3. employing co-cable transmission according to claim 1 and MIMO carry out the system that signal covers, it is characterized in that: described near-end small base station group comprises small base station protocol process module and the MIMO processing module that connects successively, the input of described small base station protocol process module is as the input of this near-end combiner unit, and the output of described MIMO processing module is described signal transmitting and receiving port.

4. employing co-cable transmission according to claim 3 and MIMO carry out the system that signal covers, it is characterized in that: described MIMO processing module is with frequency conversion function, when the signal frequency that this near-end small base station winding is received dropped in the shared frequency range of CATV signal, described MIMO processing module can be received and dispatched this signal frequency conversion to a certain idle frequency range again.

5. employing co-cable transmission according to claim 4 and MIMO carry out the system that signal covers, and it is characterized in that: also comprise a trapper, before described trapper is arranged at described CATV power splitter, be used for the signal outside the filtering CATV frequency range.

6. one kind is adopted co-cable transmission and MIMO to carry out the network-building method that signal covers, and it is characterized in that: comprise down direction and up direction;

The processing mode of described down direction is:

One near-end small base station group is provided, and an end of this this near-end small base station group connects the core net of operator, and the multiple signals of MIMO antenna networking are supported in other end output; If when the communication signal frequency of supporting drops in the shared frequency range of CATV signal, the MIMO processing module in the near-end small base station group is exported after then needing signal of communication to be converted to a certain idle frequency range first again; A plurality of near-end combiner units close the road with the CATV signal that the CATV power splitter is exported respectively with the multichannel communication signal of near-end small base station group output, will close the road signal by the CATV cable again and transfer to corresponding far-end capping unit; This far-end capping unit carries out shunt with the signal that receives, wherein the CATV signal passes through the CATV cable transmission to TV, described multichannel communication signal is then exported to respectively the MIMO antenna, if signal of communication has through frequency-conversion processing in near-end small base station group, then need to export to again the MIMO antenna after the frequency conversion reduction;

The processing mode of described up direction is:

Described far-end capping unit will from the MIMO antenna reception to the multichannel communication signal, close respectively the road with the CATV signal that transmits in the CATV cable, when if the frequency of signal of communication drops in the shared frequency range of CATV signal, frequency-variable module in the far-end capping unit closes the road with the CATV signal after then needing first signal of communication to be converted to a certain idle frequency range again, close signal behind the road by CATV cable co-cable transmission to the near-end combiner unit; The near-end combiner unit carries out shunt with the signal that receives to be transmitted, and CATV signal wherein returns by original CATV cable, and the multichannel communication signal then transfers to near-end small base station group; After processing the multichannel communication signal that receives, near-end small base station group is transferred to the core net of operator, if these multichannel communication signals have through frequency-conversion processing in the far-end capping unit, then the frequency-variable module in the near-end small base station group can at first with its respectively frequency conversion reduction, be processed, transmit again.

7. employing co-cable transmission according to claim 6 and MIMO carry out the network-building method that signal covers, and it is characterized in that: described near-end small base station group is to link to each other with the core net of operator by the broadband backhaul mode.

8. employing co-cable transmission according to claim 6 and MIMO carry out the network-building method that signal covers, and it is characterized in that: the frequency range of described CATV signal is 5-860MHz.

9. employing co-cable transmission according to claim 6 and MIMO carry out the network-building method that signal covers, and it is characterized in that: described idle frequency range be frequency be higher than 860MHz and not with the afoul available frequency band of described communication signal frequency band.

10. employing co-cable transmission according to claim 6 and MIMO carry out the network-building method that signal covers, and it is characterized in that: before described CATV power splitter one trapper is set, is used for the signal outside the filtering CATV frequency range.

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