CN102104455B - A remote multi-input multi-output method, junction box and system - Google Patents

Abstract

The embodiment of the invention provides a remote-end multiple input multiple output method, a distributing cabinet and a remote-end multiple input multiple output system, which relate to the field of communication and can reduce the influence of practical wiring on the performance of a multiple input multiple output (MIMO) technology. The remote-end multiple input multiple output method comprises the following steps of: transmitting data by adopting a digital subscriber line (DSL) technology in a main line network comprising a plurality of twisted pairs; distributing the plurality of twistedpairs in the main line network to each subscriber when approaching to the subscribers; and transmitting the data by executing the MIMO technology in a line network from line distributing points to the subscribers. The embodiment of the invention is used for the realization of the remote-end MIMO technology.

Description

A remote multi-input multi-output method, junction box and system

technical field

The invention relates to the communication field, in particular to a remote multiple-input multiple-output method, a junction box and a system.

Background technique

With the rapid development of the Internet and the rapid promotion of multimedia services, the demand for network bandwidth is increasing. In the field of broadband access, although the development trend is "optical in and copper out", there are a large number of twisted pairs in the existing network, and the laying of the fiber-to-the-home network also requires a long process. Therefore, DSL (Digital Subscriber Line, Digital Subscriber Line) technology will still be one of the mainstream broadband access technologies for quite a long time.

In order to improve the transmission bandwidth of DSL technology, the standard of ITU-T has developed from 8Mbps (downlink) of ADSL (Asymmetric Digital Subscriber Line) to 24Mbps of ADSL2+, VDSL (Very High Speed Digital Subscriber Line, very high speed digital Subscriber line) 55Mbps, VDSL2 100Mbps.

In some countries and regions, there are generally two twisted-pair cables connected to users' homes. Usually, one twisted pair is used for data transmission and the other twisted pair is used for backup. In this scenario, the operator can use the DSL bonding technology to use the two twisted pairs at the same time, providing users with a rate close to double that of the original. On this basis, MIMO (Multiple Input Multiple Output) technology uses a virtual method to generate an additional channel between two twisted pairs, providing three times the rate of a single pair of lines, so users Up to 300M speed can be obtained on twisted wire.

Many twisted-pair wires in the existing wire network come out from the switch room of the operator, connect to various residential quarters through the backbone wire network, and then connect to each specific user's home after passing through the distribution box. The current MIMO technology is to generate virtual extra channels in the switch room of the backbone network, that is, to implement MIMO technology in the backbone network, and the distribution box directly connects the twisted pair on the backbone to the twisted pair in the user's home. Short circuit, as shown in Figure 1.

MIMO technology uses the common mode signal of two twisted pairs to form a pair of differential signals. Therefore, the two twisted pairs are required to be physically adjacent to effectively resist external interference and noise. However, due to the complexity and diversity of actual network wiring, the position of a user's twisted pair in the backbone network is relatively random, which may seriously affect the best performance that MIMO technology can achieve.

For example, as shown in Fig. 2, assuming that there are 10 twisted pairs in the backbone network, choosing #1 twisted pair and #2 twisted pair to apply MIMO technology can achieve better transmission performance. But in actual wiring, it is possible that the signals on #1 twisted pair and #5 twisted pair are sent to the same user's home. In this way, when there is data transmission on the #2 twisted pair, the noise induced on the #2 twisted pair on the #1 twisted pair is greater than the noise induced on the #5 twisted pair. If MIMO technology is applied to #1 twisted pair and #5 twisted pair, the system needs to distinguish the useful differential signal on the virtual channel from the noise induced on #2 twisted pair, which will cause a significant decline in the performance of MIMO technology.

Contents of the invention

Embodiments of the present invention provide a remote multiple-input multiple-output method, a distribution box and a system, which can reduce the impact of actual wiring on the performance of MIMO technology.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

In one aspect, a remote multiple-input multiple-output method is provided, including:

In the trunk line network containing multiple twisted pairs, data is transmitted with digital subscriber line DSL technology; the multiple twisted pairs in the trunk line network will be divided for each user when they are close to the users;

In the line network from the distribution point to the user, the multiple-input multiple-output (MIMO) technology is implemented to transmit the data.

On the one hand, a distribution box is provided, one end of which is connected to the main line network, and the other end is connected to the user, and is used to divide the multiple twisted pairs in the main line network into groups of twisted pairs for each user, It is characterized in that, in the main line network before reaching the junction box, the data is transmitted by DSL technology, and the data is transmitted by MIMO technology in the junction box.

In one aspect, a remote multiple-input multiple-output system is provided, including: a backbone network switch, a backbone network connected to the backbone network switch, a junction box connected to the backbone network, and a distribution box connected to the branch network Users connected to wire boxes, wherein the connecting lines are all twisted-pair wires,

The distribution box, one end is connected to the main line network, and the other end is connected to the user, and is used to divide the multiple twisted pairs in the main line network into each group of twisted pairs facing each user. In the main line network before the junction box, data is transmitted by DSL technology, and the data is transmitted by implementing MIMO technology in the junction box.

The remote multi-input multi-output method, distribution box and system provided by the embodiments of the present invention transmit data with DSL technology in a backbone network containing multiple twisted pairs; the multiple twisted pairs in the backbone network When approaching the user, the line will be split for each user; in the line network from the point of split to the user, MIMO technology will be implemented to transmit the data. This is different from the scheme of implementing MIMO technology in the backbone network in the prior art. The embodiment of the present invention transmits data with DSL technology in the backbone network. Although there are many twisted pairs in the backbone network at this time, due to There is no virtual additional channel, so there is no problem of mutual interference; MIMO technology is implemented at the point where multiple twisted pairs in the backbone network face each user to generate virtual channels and transmit data. There is no interference from other twisted-pair lines in this twisted-pair line, so the impact of interference on the performance of MIMO technology can be reduced, thereby solving the problem that actual wiring has an impact on the performance of MIMO technology.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic diagram of a networking structure of a remote MIMO technology in the prior art;

Fig. 2 is the schematic diagram of the location of the twisted pair in the main line network;

FIG. 3 is a schematic flowchart of a remote MIMO method provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram of a networking structure of a remote MIMO method provided by an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a junction box provided by an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a remote MIMO system provided by an embodiment of the present invention;

FIG. 7 is another schematic structural diagram of a remote MIMO system provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The remote MIMO method provided by the embodiment of the present invention, as shown in FIG. 1 , includes:

S301. In a backbone network containing multiple twisted pairs, transmit data using DSL technology; the multiple twisted pairs in the backbone network will be branched towards each user when approaching the users.

Here, the so-called "close to the user" means that in the backbone network, multiple twisted-pair wires transmit data together. When the lines enter each user's home, they enter in groups of two or four. Yes, this requires at a certain point to divide the multi-twisted pairs in the backbone network into groups for each user. Generally, the branching point is set in a cell close to the user, so in this embodiment, the branching point is referred to as the branching point for branching when the trunk line network is close to the user.

S302. In the line network from the branch point to the user, implement the multiple-input multiple-output (MIMO) technology to transmit the data.

The far-end MIMO method provided by the embodiment of the present invention transmits data with DSL technology in a backbone network containing multiple twisted pairs; the multiple twisted pairs in the backbone network will face Each user performs branching; in the line network from the branching point to the user, MIMO technology is implemented to transmit the data. This is different from the scheme of implementing MIMO technology in the backbone network in the prior art. The embodiment of the present invention transmits data with DSL technology in the backbone network. Although there are many twisted pairs in the backbone network at this time, due to There is no virtual additional channel, so there is no problem of mutual interference; MIMO technology is implemented at the point where multiple twisted pairs in the backbone network face each user to generate virtual channels and transmit data. There is no interference from other twisted-pair lines in this twisted-pair line, so the impact of interference on the performance of MIMO technology can be reduced, thereby solving the problem that actual wiring has an impact on the performance of MIMO technology.

A remote MIMO method provided by another embodiment of the present invention is described with reference to FIG. 4 .

As shown in FIG. 4 , the transmission data enters the backbone network 402 from the backbone network switch 401 to the distribution box 403 , and then the distribution box 403 transmits the data to each user 404 respectively.

In the trunk line network 402 containing multiple twisted pairs, ordinary DSL technology is used to transmit data, that is, each twisted pair transmits signals independently, and MIMO technology is not applied between twisted pairs. The distance between them does not affect the transfer rate.

Since no virtual channel is generated at this time, three twisted pairs can be selected to achieve the highest data transmission rate of 300Mbps. For example, use three twisted pairs #1, #5, and #7 in Figure 2 to transmit data up to 300Mbps. Since these three twisted pairs are not adjacent, when there is data transmission on #2 twisted pair or #6 twisted pair, the noise induced on #1, #5, #7 twisted pair will be different.

In the prior art, this difference will be mixed with the differential signal in the virtual channel, making it difficult to distinguish. However, in this embodiment, since there is no virtual channel here, there is no need to distinguish noise. For each twisted pair itself, since the two metal wires of the twisted pair are tightly wound together, the noise induced by the signals on the other twisted pair to the two metal wires is basically reflected in the form of common mode. , so it is easier to distinguish it from the differential signal transmitted on these two metal lines, so it has little influence on the transmitted data.

When the multiple twisted pairs in the trunk line network 402 approach the users 404 , they will be branched towards each user 404 . In the line network from the branch point to the user 404, MIMO technology is implemented to transmit data.

Because one end of the junction box 403 is connected to the main line network 402, and the other end is connected to the user 404, the multi-following twisted pair wires that are just positioned in the main line network 402 are facing each user when they are close to the user. The MIMO technology is implemented in the line network from the line point to the user. In this embodiment, the MIMO technology is implemented in the line network from the junction box 403 to the user 404, so MIMO can be applied at the junction box 403 technology.

Specifically, the data transmitted on the three twisted pairs 11, 12, 13 in the backbone network 402 may be coupled to the two twisted pairs 21, 22 facing the same user (for example, user 1) for transmission. The data transmitted on the two twisted pairs 11 and 12 in the backbone network 402 can be coupled one-to-one to the two twisted pairs 21 and 22 facing the same user, and then the data of the user (user 1) can be used. The common mode signal of the two twisted pairs constructs a virtual channel, and the data transmitted on the third twisted pair 13 in the backbone network 402 is coupled into the virtual channel.

The two twisted pairs sent to the same user's home are generally wired together, and most of the external noise induction will be reflected in the form of common mode, so it is easier to distinguish from the differential signal transmitted in the virtual channel. Moreover, unlike a large number of twisted pairs bundled together in the backbone network, there are not many other twisted pairs next to the two twisted pairs sent to the same user's home. It is well known that the noise induction decreases with the increase of the distance. Therefore, when multiple twisted pairs in the backbone network face each user and apply MIMO technology, the three channels formed by the two twisted pairs are less affected. The interference of other twisted pairs can get a higher transmission rate.

In addition, the coupling process after the branching of the junction box only needs some appropriate passive transformers, and no additional power supply is required, so it can be placed together with the existing junction box to reduce the space occupied by the equipment, and at the same time Also easy to maintain.

The junction box 50 provided by the embodiment of the present invention, as shown in Figure 5, includes:

One end of the junction box 50 is connected to the trunk line network, and the other end is connected to the user, and is used to divide a plurality of twisted pairs in the trunk line network into each group of twisted pairs facing each user, and after arriving at the junction box 50 In the previous backbone network, DSL technology is used to transmit data, and MIMO technology is implemented in the junction box 50 to transmit the data.

Further, the junction box 50 includes:

The coupling unit 501 is configured to couple the data transmitted on the three twisted pairs in the backbone network to the two twisted pairs facing the same user.

The distribution box provided by the embodiment of the present invention has one end connected to the main line network and the other end connected to the user, and is used to divide the multiple twisted pairs in the main line network into groups of twisted pairs facing each user. In the backbone network in front of the junction box, data is transmitted by DSL technology, and MIMO technology is implemented in the junction box to transmit data. This is different from the scheme of implementing MIMO technology in the backbone network in the prior art. The embodiment of the present invention transmits data with DSL technology in the backbone network. Although there are many twisted pairs in the backbone network at this time, due to There is no virtual additional channel, so there is no problem of mutual interference; MIMO technology is implemented at the point where multiple twisted pairs in the backbone network face each user to generate virtual channels and transmit data. There is no interference from other twisted-pair lines in this twisted-pair line, so the impact of interference on the performance of MIMO technology can be reduced, thereby solving the problem that actual wiring has an impact on the performance of MIMO technology.

The remote MOMI system provided by the embodiment of the present invention, as shown in FIG. 6 , includes: a backbone network switch 601, a backbone network 602 connected to the backbone network switch 601, a junction box 603 connected to the backbone network 602, and The user 604 connected to the junction box 603, wherein the connection lines are all twisted-pair lines.

Junction box 603, one end is connected with main line network 602, and the other end is connected with user 604, is used for dividing the plurality of twisted pairs in the main line network 602 into each group of twisted pairs facing each user. In the trunk line network 602 before the junction box 603 , data is transmitted by DSL technology, and MIMO technology is implemented in the junction box 603 to transmit data.

The remote MOMI system provided by the embodiment of the present invention includes: a backbone network switch, a backbone network connected to the backbone network switch, a junction box connected to the trunk network, and a user connected to the junction box, wherein the connection The lines are all twisted pairs; one end of the distribution box is connected to the main line network, and the other end is connected to the user. It is used to divide multiple twisted pairs in the main line network into groups of twisted pairs for each user. In the trunk line network before reaching the junction box, data is transmitted by DSL technology, and MIMO technology is implemented in the junction box to transmit data. This is different from the scheme of implementing MIMO technology in the backbone network in the prior art. The embodiment of the present invention transmits data with DSL technology in the backbone network. Although there are many twisted pairs in the backbone network at this time, due to There is no virtual additional channel, so there is no problem of mutual interference; MIMO technology is implemented at the point where multiple twisted pairs in the backbone network face each user to generate virtual channels and transmit data. There is no interference from other twisted-pair lines in this twisted-pair line, so the impact of interference on the performance of MIMO technology can be reduced, thereby solving the problem that actual wiring has an impact on the performance of MIMO technology.

Further, as shown in Figure 7, the junction box 603 includes:

The coupling unit 6031 is configured to couple the data transmitted on the three twisted pairs in the backbone network 502 to the two twisted pairs facing the same user.

Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the It includes the steps of the above-mentioned method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (3)

1. A remote multiple-input multiple-output method, characterized in that, comprising: In the trunk line network containing multiple twisted pairs, data is transmitted with digital subscriber line DSL technology; the multiple twisted pairs in the trunk line network will be divided for each user when they are close to the users; In the line network from the distribution point to the user, implement multiple-input multiple-output MIMO technology to transmit the data; Wherein, in the line network from the branch point to the user, implementing the MIMO technology to transmit the data includes: at the line branch point, coupling the data transmitted on the three twisted pairs in the trunk line network to Transmission on two twisted-pair lines facing the same user; Coupling the data transmitted on the three twisted pairs in the backbone network to the two twisted pairs facing the same user includes: pairing the data transmitted on the two twisted pairs in the backbone network one-to-one The ground is coupled to two twisted pairs facing the same user, and then the common mode signal of the two twisted pairs of the user is used to construct a virtual channel, and the third twisted pair in the backbone network is transmitted Data is coupled into the virtual channel. 2. A distribution box, one end is connected with the main line network, and the other end is connected with the user, and is used to divide the multiple twisted pairs in the main line network into each group of twisted pairs facing each user, its characteristics In that, in the trunk line network before reaching the junction box, the data is transmitted by DSL technology, and the MIMO technology is implemented in the junction box to transmit the data; The distribution box includes: a coupling unit, which is used to couple the data transmitted on the three twisted pairs in the trunk line network to the two twisted pairs facing the same user; Coupling the data transmitted on the three twisted pairs in the backbone network to the two twisted pairs facing the same user includes: pairing the data transmitted on the two twisted pairs in the backbone network one-to-one The ground is coupled to two twisted pairs facing the same user, and then the common mode signal of the two twisted pairs of the user is used to construct a virtual channel, and the third twisted pair in the backbone network is transmitted Data is coupled into the virtual channel. 3. A remote MIMO system, comprising: a backbone network switch, a backbone network connected to the backbone network switch, a junction box connected to the trunk network, and a junction box connected to the trunk network Connected users, wherein the connection lines are all twisted pairs, characterized in that, The distribution box, one end is connected to the main line network, and the other end is connected to the user, and is used to divide the multiple twisted pairs in the main line network into each group of twisted pairs facing each user. In the main line network before the junction box, transmit data with DSL technology, and implement MIMO technology to transmit the data in the junction box; Wherein, the distribution box includes: a coupling unit, which is used to couple the data transmitted on the three twisted pairs in the main line network to the two twisted pairs facing the same user; Coupling the data transmitted on the three twisted pairs in the backbone network to the two twisted pairs facing the same user includes: pairing the data transmitted on the two twisted pairs in the backbone network one-to-one The ground is coupled to two twisted pairs facing the same user, and then the common mode signal of the two twisted pairs of the user is used to construct a virtual channel, and the third twisted pair in the backbone network is transmitted Data is coupled into the virtual channel.

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