CN108271170B - Distributed antenna system, multi-channel signal transmission system and method - Google Patents
Distributed antenna system, multi-channel signal transmission system and method Download PDFInfo
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- CN108271170B CN108271170B CN201611264706.4A CN201611264706A CN108271170B CN 108271170 B CN108271170 B CN 108271170B CN 201611264706 A CN201611264706 A CN 201611264706A CN 108271170 B CN108271170 B CN 108271170B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
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Abstract
Embodiments of the present application provide a distributed antenna system, a multi-channel signal transmission system, and a method, so as to at least reduce the cost of an existing DAS that transmits signals in multiple streams. The DAS comprises M circuit feeders and N antennas distributed at N positions, wherein M is a positive integer larger than or equal to 2, N is a positive integer, and N is larger than or equal to M; each of the M feeder lines is respectively connected to different ports of M ports of the radio frequency module; and M adjacent antennas in the N antennas are respectively connected to different feeders in the M feeders, wherein a coverage overlapping area is formed by communication coverage ranges of S antennas in the M adjacent antennas, the coverage overlapping area supports Q-path signal transmission, S takes any value from 2 to M, and Q takes all values from 1 to S. The application is applicable to the technical field of communication.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a Distributed Antenna System (DAS), a multipath signal transmission System, and a method thereof.
Background
With the development of Mobile Broadband (MBB), the popularization of intelligent terminals and the wide use of Mobile applications, people's demand for Mobile data is rapidly increasing. Research and analysis show that the indoor coverage service occupies about 90% of the total amount of the mobile broadband service, and therefore many operators need to expand the capacity of the existing indoor system urgently.
DAS is a common technique for solving the problem of indoor coverage at present, and is mainly composed of a feeder line, a combiner, a coupler, a power divider, and an antenna. DAS has been deployed in indoor buildings such as malls, movie theaters, gymnasiums, large offices of enterprises, hospitals, schools, etc. in most cities today.
Currently, most of the deployed Long Term Evolution (LTE) DAS supports only one-channel signal transmission. As shown in fig. 1, after receiving a signal from a Radio Remote Unit (RRU), indoor coverage is performed by a DAS. However, the LTE multiple-Input multiple-Output (MIMO) technology supports multiple signal transmission, and how to transmit multiple signals on the DAS is a problem to be considered for new creation or upgrade of the DAS.
Fig. 2 shows an existing DAS for transmitting two-way signals, where a set of circuits needs to be newly deployed, a coupler, a power divider and other devices need to be added at the same position, and an antenna is added or a dual-polarized antenna is replaced at the antenna, compared with the DAS for transmitting one-way signals. Obviously, compared with the DAS for transmitting a single-channel signal, this requires a double number of feeder lines and devices, which is costly.
Disclosure of Invention
Embodiments of the present application provide a distributed antenna system, a multi-channel signal transmission system, and a method, so as to at least reduce the cost of an existing DAS that transmits signals in multiple streams.
In order to achieve the above purpose, the embodiments of the present application provide the following technical solutions:
on one hand, a distributed antenna system DAS is provided, which comprises M circuit feeders and N antennas distributed at N positions, wherein M is a positive integer larger than or equal to 2, N is a positive integer, and N is larger than or equal to M; each of the M feeder lines is respectively connected to different ports of M ports of the radio frequency module; and M adjacent antennas in the N antennas are respectively connected to different feeders in the M feeders, wherein a coverage overlapping area is formed by communication coverage areas of S antennas in the M adjacent antennas, the coverage overlapping area supports Q-path signal transmission, S takes any value from 2 to M, and Q takes all values from 1 to S. Based on the DAS provided in the embodiment of the present application, the DAS in the embodiment of the present application includes M feeder lines and N antennas distributed at N positions, where M is a positive integer greater than or equal to 2, N is a positive integer, and N is greater than or equal to M; and each of the M feeder lines is connected to a different port of the M ports of the radio frequency module, and M adjacent antennas of the N antennas are connected to different feeder lines of the M feeder lines, respectively, wherein a coverage overlapping area formed by communication coverage of S antennas of the M adjacent antennas supports Q-path signal transmission, S takes any value from 2 to M, and Q takes all values from 1 to S, so MIMO multi-path signal transmission can be formed in the coverage overlapping area. For example, if the coverage overlapping area is formed by communication coverage of 2 antennas, MIMO dual-path transmission may be formed in the coverage overlapping area; if the coverage overlap area is formed by communication coverage of 4 antennas, MIMO two-way transmission, MIMO three-way transmission, MIMO four-way transmission, and/or the like may be formed in the coverage overlap area. Compared with the existing DAS for transmitting multi-channel signals, the DAS in the embodiment of the application only needs to add a feeder on the DAS for transmitting single-channel signals and does not need to add an antenna, so that hardware investment can be saved, construction can be reduced, and cost can be reduced.
In one possible design, if M is 2, adjacent M antennas of the N antennas are respectively connected to different ones of the M feeders, wherein a coverage overlap area is formed by communication coverage areas of S antennas of the adjacent M antennas, the coverage overlap area supports Q-way signal transmission, S takes any value from 2 to M, and Q takes all values from 1 to S, including: a first antenna of the N antennas is connected to a first feeder of the two feeders; a second antenna of the N antennas is connected to a second feeder of the two feeders; wherein the first antenna and the second antenna are two adjacent antennas of the N antennas; the coverage overlap area formed by the communication coverage areas of the first antenna and the second antenna supports one-way signal transmission and two-way signal transmission. Compared with the existing DAS for transmitting multi-channel signals, the DAS in the embodiment of the application only needs to add one feeder line on the DAS for transmitting single-channel signals and does not need to add an antenna, so that hardware investment can be saved, construction can be reduced, and cost can be reduced.
In one possible design, if M is 4, adjacent M antennas of the N antennas are respectively connected to different ones of the M feeder lines, wherein a coverage overlap area is formed by communication coverage areas of S antennas of the adjacent M antennas, the coverage overlap area supports Q-way signal transmission, S takes any value from 2 to M, and Q takes all values from 1 to S, including: a first antenna of the N antennas is connected to a first feed of the four feeds; a second antenna of the N antennas is connected to a second feed of the four feeds; a third antenna of the N antennas is connected to a third feed of the four feeds; a fourth antenna of the N antennas is connected to a fourth feed of the four feeds; wherein the first antenna, the second antenna, the third antenna and the fourth antenna are four adjacent antennas of the N antennas; a coverage overlapping area formed by the communication coverage areas of any two antennas of the first antenna, the second antenna, the third antenna and the fourth antenna supports one-path signal transmission and two-path signal transmission; a coverage overlapping area formed by the communication coverage areas of any three of the first antenna, the second antenna, the third antenna and the fourth antenna supports one-path signal transmission, two-path signal transmission and three-path signal transmission; the coverage overlapping area formed by the communication coverage areas of the first antenna, the second antenna, the third antenna and the fourth antenna supports one-way signal transmission, two-way signal transmission, three-way signal transmission and four-way signal transmission. Compared with the existing DAS for transmitting multi-channel signals, the DAS in the embodiment of the application only needs to add two or three feeders on the DAS for transmitting single-channel signals and does not need to add antennas, so that hardware investment can be saved, construction can be reduced, and cost can be reduced.
In one possible design, the radio frequency module includes a radio remote unit RRU or a radio unit RU.
In another aspect, a multi-channel signal transmission system is provided, which includes a radio frequency module and the DAS according to any of the above aspects.
Since the multiple signal transmission system provided in the embodiment of the present application includes the DAS according to any one of the above aspects, the technical effect that can be obtained by the multiple signal transmission system can also refer to the technical effect of the DAS, which is not described herein again.
In another aspect, there is provided a multiplex transmission method applied to the multiplex transmission system according to the above aspect, the method including: receiving M paths of signals through M ports of the radio frequency module; transmitting the M signals to the N antennas through the M feeders respectively, and transmitting the M signals through the N antennas; and forming a coverage overlapping area by the communication coverage range of S antennas in the M adjacent antennas, wherein the coverage overlapping area supports Q-path signal transmission, S takes any value from 2 to M, and Q takes all values from 1 to S. Based on the multi-channel signal transmission method provided by the embodiment of the application, downlink multi-channel signal transmission from the radio frequency module to the terminal can be realized.
In one possible design, the method further includes: respectively receiving M paths of signals through each antenna in the adjacent M antennas; the communication coverage range of S antennas in the M adjacent antennas forms a coverage overlapping area, the coverage overlapping area supports Q-path signal transmission, S takes any value from 2 to M, and Q takes all values from 1 to S; and transmitting the M paths of signals received by each antenna to the radio frequency module through a feeder line connected with each antenna, and processing the M paths of signals by the radio frequency module to obtain the S paths of signals. Based on the multipath signal transmission method provided by the embodiment of the application, uplink multipath signal transmission from the terminal to the radio frequency module can be realized.
In one possible design, if M is 2, a coverage overlapping area is formed by communication coverage areas of S antennas in the M adjacent antennas, the coverage overlapping area supports Q-path signal transmission, S takes any value from 2 to M, and Q takes all values from 1 to S, including that the coverage overlapping area formed by the communication coverage areas of the first antenna and the second antenna supports one-path signal transmission and two-path signal transmission; wherein, the first antenna and the second antenna are two adjacent antennas in the N antennas.
In one possible design, if M is 4, a coverage overlapping area is formed by communication coverage areas of S antennas in the adjacent M antennas, the coverage overlapping area supports Q-path signal transmission, S takes an arbitrary value from 2 to M, and Q takes all values from 1 to S, including that a coverage overlapping area formed by communication coverage areas of any two antennas of the first antenna, the second antenna, the third antenna, and the fourth antenna supports one-path signal transmission and two-path signal transmission; a coverage overlapping area formed by the communication coverage areas of any three of the first antenna, the second antenna, the third antenna and the fourth antenna supports one-path signal transmission, two-path signal transmission and three-path signal transmission; a coverage overlapping area formed by the communication coverage areas of the first antenna, the second antenna, the third antenna and the fourth antenna supports one-way signal transmission, two-way signal transmission, three-way signal transmission and four-way signal transmission; wherein the first antenna, the second antenna, the third antenna and the fourth antenna are adjacent four antennas of the N antennas.
In summary, based on the distributed antenna system, the multi-channel signal transmission system and the method provided by the embodiment of the present application, the embodiment of the present application can not only form MIMO multi-channel signal transmission in the coverage overlapping area formed by the communication coverage areas of multiple antennas; compared with the existing DAS for transmitting multi-channel signals, the DAS in the embodiment of the application only needs to add a feeder on the DAS for transmitting single-channel signals and does not need to add an antenna, so that hardware investment and construction can be saved, and cost can be reduced.
Drawings
Fig. 1 is a schematic diagram of a conventional DAS supporting single-channel signal transmission;
fig. 2 is a schematic structural diagram of a conventional DAS supporting two-way signal transmission;
fig. 3 is a first schematic diagram of a multi-channel signal transmission system according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram illustrating a second architecture of a multi-channel signal transmission system according to an embodiment of the present application;
fig. 5 is a third schematic diagram of an architecture of a multi-channel signal transmission system according to an embodiment of the present application;
fig. 6 is a first flowchart of a multi-channel signal transmission method according to an embodiment of the present disclosure;
fig. 7 is a flowchart illustrating a second method for transmitting multiple signals according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Where "/" in the present application means "or", for example, a/B may mean a or B; in the present application, "and/or" is only an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.
Fig. 3 is a schematic diagram of an architecture of a multiple signal transmission system according to an embodiment of the present application. The multiplex transmission system comprises a radio frequency module and a DAS. The DAS comprises M circuit feeders and N antennas distributed at N positions, wherein M is a positive integer larger than or equal to 2, N is a positive integer, and N is larger than or equal to M.
Each of the M feeder lines is connected to a different one of the M ports of the radio frequency module.
And adjacent M antennas in the N antennas are respectively connected to different feeders in the M feeders, wherein a coverage overlapping area is formed by communication coverage ranges of S antennas in the adjacent M antennas, the coverage overlapping area supports Q signal transmission, S takes any value from 2 to M, and Q takes all values from 1 to S.
Specifically, the Radio frequency module in the embodiment of the present application may be an RRU or a Radio frequency Unit (RU), which is not specifically limited in the embodiment of the present application. In addition, the RRU or the RU may be independently deployed or integrated in the base station, and this is not specifically limited in this embodiment of the present application.
The forming of the coverage overlapping area by the communication coverage areas of the S antennas specifically means: if the received signal strength of the signals received by the S antennas at a certain position is greater than a certain threshold (e.g., -70dBm), the position belongs to a position in a coverage overlapping area formed by the communication coverage of the S antennas. All the positions meeting the rule form a coverage overlapping area formed by the communication coverage range of the S antennas.
Specifically, in this embodiment of the application, the connection of the adjacent M antennas of the N antennas to different feeder lines of the M feeder lines may specifically include: any adjacent M antennas in the N antennas are respectively connected to different feeder lines in the M feeder lines; or, M adjacent antennas in the N antennas are respectively connected to different feeder lines in the M feeder lines, and a part of antennas in the M adjacent antennas are also connected to the same feeder line in the M feeder lines.
It should be noted that fig. 3 is only an exemplary illustration in which the antenna N is connected to the feeder M of the M feeders, and of course, the antenna N may be connected to any one of the M feeders, which is not specifically limited in this embodiment of the application.
It should be noted that the antenna M and the antenna M +1 in fig. 3 are only used to characterize adjacent antennas, and do not limit whether the antennas are numbered or not, for example, the antenna 1 and the antenna 2 are adjacent antennas, the antenna 2 and the antenna 3 are adjacent antennas, and so on. In the embodiment of the present application, the adjacent antennas specifically refer to antennas that can form a coverage overlapping area, which is described herein in a unified manner and will not be described in detail below.
It should be noted that the DAS provided in the embodiment of the present application may further include devices such as a combiner, a coupler, and a power divider, and this is not particularly limited in the embodiment of the present application. One port of the combiner is connected with the port of the radio frequency module, and the other port of the combiner is connected with the ports of other systems and is used for combining the output signal of the port of the radio frequency module with the different-frequency signal of other systems or the same system; the power divider is connected with the combiner and used for equally dividing signals output by the combiner into different branches; the coupler is arranged on a feeder line of the branch divided by the power divider and used for dividing signals output by the power divider into different branches unequally. Reference may be made to the existing DAS deployment, which is not described herein again.
The DAS may be modified from an existing DAS that transmits a single-channel signal, or may be newly built, and this is not particularly limited in the embodiment of the present invention.
Based on the DAS provided in the embodiment of the present application, the DAS in the embodiment of the present application includes M feeder lines and N antennas distributed at N positions, where M is a positive integer greater than or equal to 2, N is a positive integer, and N is greater than or equal to M; and each of the M feeder lines is connected to a different port of the M ports of the radio frequency module, and M adjacent antennas of the N antennas are connected to different feeder lines of the M feeder lines, respectively, wherein a coverage overlapping area formed by communication coverage of S antennas of the M adjacent antennas supports Q-path signal transmission, S takes any value from 2 to M, and Q takes all values from 1 to S, so MIMO multi-path signal transmission can be formed in the coverage overlapping area. For example, if the coverage overlapping area is formed by communication coverage of 2 antennas, MIMO dual-path transmission may be formed in the coverage overlapping area; if the coverage overlap area is formed by communication coverage of 4 antennas, MIMO two-way transmission, MIMO three-way transmission, MIMO four-way transmission, and/or the like may be formed in the coverage overlap area. Compared with the existing DAS for transmitting multi-channel signals, the DAS in the embodiment of the application only needs to add a feeder on the DAS for transmitting single-channel signals and does not need to add an antenna, so that hardware investment can be saved, construction can be reduced, and cost can be reduced.
Specifically, fig. 4 illustrates an example where M is 2, that is, the DAS includes two feeder lines, namely, a feeder line 1 and a feeder line 2. Then, M adjacent antennas of the N antennas are respectively connected to different feeders of the M feeders, where a coverage overlapping area is formed by communication coverage areas of S antennas of the M adjacent antennas, the coverage overlapping area supports Q signal transmission, S takes any value from 2 to M, and Q takes all values from 1 to S, which may specifically include:
a first antenna of the N antennas is connected to the feeder 1; the second of the N antennas is connected to the feed 2. The first antenna and the second antenna are two adjacent antennas in the N antennas. The coverage overlap area formed by the communication coverage of the first antenna and the second antenna supports one-way signal transmission and two-way signal transmission.
For example, the antenna 1 and the antenna 2 in fig. 4 are two adjacent antennas. Wherein, the coverage overlapping area a1 formed by the communication coverage of antenna 1 and antenna 2 supports single-channel signal transmission and MIMO two-channel signal transmission.
Or, for example, the antenna 2 and the antenna 3 in fig. 4 are two adjacent antennas. Therein, a coverage overlap area a2 formed by the communication coverage of antennas 2 and 3 supports single-pass signaling and MIMO two-pass signaling.
Or, for example, the antenna 3 and the antenna 4 in fig. 4 are two adjacent antennas. Wherein the coverage overlap area a3 formed by the communication coverage of antennas 3 and 4 supports single-pass signaling and MIMO two-pass signaling, among others.
It should be noted that fig. 4 is only an exemplary illustration in which the antenna N is connected to the feeder 2, and of course, the antenna N may also be connected to the feeder 1, which is not specifically limited in this embodiment of the application.
Compared with the existing DAS for transmitting multi-channel signals, the DAS in the embodiment of the application only needs to add one feeder line on the DAS for transmitting single-channel signals and does not need to add an antenna, so that hardware investment can be saved, construction can be reduced, and cost can be reduced.
Specifically, fig. 5 illustrates an example where M is 4, that is, the DAS includes four feeder lines, namely, the feeder line 1, the feeder line 2, the feeder line 3, and the feeder line 4. Then, M adjacent antennas of the N antennas are respectively connected to different feeders of the M feeders, where a coverage overlapping area is formed by communication coverage areas of S antennas of the M adjacent antennas, the coverage overlapping area supports Q signal transmission, S takes any value from 2 to M, and Q takes all values from 1 to S, which may specifically include:
a first antenna of the N antennas is connected to the feeder 1; a second antenna of the N antennas is connected to the feeder 2, and a third antenna of the N antennas is connected to the feeder 3; a fourth antenna of the N antennas is connected to the feed line 4. The first antenna, the second antenna, the third antenna and the fourth antenna are four adjacent antennas in the N antennas. A coverage overlapping area formed by communication coverage areas of any two antennas of the first antenna, the second antenna, the third antenna and the fourth antenna supports one-path signal transmission and two-path signal transmission; a coverage overlapping area formed by the communication coverage range of any three antennas of the first antenna, the second antenna, the third antenna and the fourth antenna supports one-path signal transmission, two-path signal transmission and three-path signal transmission; the coverage overlapping area formed by the communication coverage areas of the first antenna, the second antenna, the third antenna and the fourth antenna supports one-way signal transmission, two-way signal transmission, three-way signal transmission and four-way signal transmission.
For example, the antenna 1, the antenna 2, the antenna 3, and the antenna 4 in fig. 5 are adjacent four antennas. Wherein the coverage overlap area a1 formed by the communication coverage of the antennas 1 and 3, the coverage overlap area a2 formed by the communication coverage of the antennas 1 and 2, the coverage overlap area A3 formed by the communication coverage of the antennas 2 and 4, and the coverage overlap area a4 formed by the communication coverage of the antennas 3 and 4 support single-pass signal transmission and MIMO two-pass signal transmission; a coverage overlap area B1 formed by the communication coverage of the antennas 1, 2 and 3, a coverage overlap area B2 formed by the communication coverage of the antennas 1, 2 and 4, a coverage overlap area B3 formed by the communication coverage of the antennas 1, 3 and 4 and a coverage overlap area B4 formed by the communication coverage of the antennas 2, 3 and 4 support single-pass signal transmission, MIMO two-pass signal transmission and three-pass MIMO signal transmission; the coverage overlap area C1 formed by the communication coverage of antenna 1, antenna 2, antenna 3, and antenna 4 supports single-pass signaling, MIMO two-pass signaling, MIMO three-pass signaling, and MIMO four-pass signaling.
Alternatively, for example, the antennas 3, 4, 5, and 6 in fig. 5 are four adjacent antennas. Wherein a coverage overlap area a4 formed by the communication coverage of antennas 3 and 4, a coverage overlap area a5 formed by the communication coverage of antennas 3 and 5, a coverage overlap area a6 formed by the communication coverage of antennas 4 and 6, and a coverage overlap area a7 formed by the communication coverage of antennas 5 and 6 support single-pass signal transmission and MIMO two-pass signal transmission; a coverage overlap area B5 formed by the communication coverage of the antennas 3, 4 and 5, a coverage overlap area B6 formed by the communication coverage of the antennas 3, 4 and 6, a coverage overlap area B7 formed by the communication coverage of the antennas 3, 5 and 6 and a coverage overlap area B8 formed by the communication coverage of the antennas 4, 5 and 6 support single-pass signal transmission, MIMO two-pass signal transmission and three-pass MIMO signal transmission; the coverage overlap area C2 formed by the communication coverage of antennas 3, 4, 5, and 6 supports single-pass signaling, MIMO two-pass signaling, MIMO three-pass signaling, and MIMO four-pass signaling.
Alternatively, for example, the antennas 5, 6, 7, and 8 in fig. 5 are four adjacent antennas. Wherein a coverage overlap area a7 formed by the communication coverage of antennas 5 and 6, a coverage overlap area A8 formed by the communication coverage of antennas 5 and 7, a coverage overlap area a9 formed by the communication coverage of antennas 6 and 8, and a coverage overlap area a10 formed by the communication coverage of antennas 7 and 8 support single-pass signal transmission and MIMO two-pass signal transmission; a coverage overlap area B9 formed by the communication coverage of the antennas 5, 6 and 7, a coverage overlap area B10 formed by the communication coverage of the antennas 5, 6 and 8, a coverage overlap area B11 formed by the communication coverage of the antennas 5, 7 and 8 and a coverage overlap area B12 formed by the communication coverage of the antennas 6, 7 and 8 support single-pass signaling, MIMO two-pass signaling and three-pass MIMO signaling; the coverage overlap area C3 formed by the communication coverage areas of antennas 5, 6, 7, and 8 supports single-pass signaling, MIMO two-pass signaling, MIMO three-pass signaling, and MIMO four-pass signaling, among others.
It should be noted that fig. 5 illustrates that the antenna N is connected to the feed line 4, but of course, the antenna N may also be connected to the feed line 1, the feed line 2, or the feed line 3, which is not specifically limited in this embodiment of the present application.
It can be seen that, compared with the existing DAS for transmitting multi-path signals, the DAS in the embodiment of the present application only needs to add three feeder lines to the DAS for transmitting single-path signals as shown in fig. 1, and does not need to add an antenna, so that hardware investment and construction can be reduced, and thus cost can be reduced.
Of course, fig. 1 is only an exemplary architectural illustration of a DAS that transmits a single-channel signal. In addition, in a scenario where a large antenna communication coverage is required, there is also a DAS for transmitting a single-channel signal, where the DAS includes a power divider in addition to the devices shown in fig. 1. One end of the power divider is connected with the port 1, and the other end of the power divider is divided into two branches, wherein one branch is a feeder 1, and the other branch is a feeder 3. When the DAS including 4 feeders shown in fig. 5 is deployed, the feeder 3 divided by the power divider may be connected to the port 3, and two additional feeders are added, one being connected to the port 2 and the other being connected to the port 4. The present embodiment does not specifically limit this case. Compared with the existing DAS for transmitting multi-channel signals, the method only needs to add two feeder lines on the DAS for transmitting single-channel signals, and does not need to add antennas, so that the hardware investment can be saved, the construction can be reduced, and the cost can be reduced.
As shown in fig. 6, a multiple signal transmission method provided for the embodiment of the present application is applied to any one of the multiple signal transmission systems shown in fig. 3 to fig. 5, and includes the following steps:
s601, receiving M paths of signals through M ports of the radio frequency module.
And S602, transmitting the M paths of signals to the N antennas through the M paths of feeder lines respectively, and transmitting the signals through the N antennas. The communication coverage range of S antennas in the adjacent M antennas forms a coverage overlapping area, the coverage overlapping area supports Q-path signal transmission, S takes any value from 2 to M, and Q takes all values from 1 to S.
For example, taking M ═ 2 as an example for explanation, that is, assuming that the multiple signal transmission system is specifically shown in fig. 4, receiving M channels of signals through M ports of the radio frequency module may specifically include: port 1 signals are received through port 1 of the radio frequency module and port 2 signals are received through port 2 of the radio frequency module.
Forming a coverage overlapping area by communication coverage areas of S antennas in adjacent M antennas, where the coverage overlapping area supports Q-path signal transmission, S takes any value from 2 to M, and Q takes all values from 1 to S, which may specifically include:
the coverage overlap area formed by the communication coverage of the first antenna and the second antenna supports one-way signal transmission and two-way signal transmission. The first antenna and the second antenna are two adjacent antennas in the N antennas. For example, the first antenna and the second antenna may be antenna 1 and antenna 2, respectively; alternatively, the first and second antennas may be antennas 2 and 3, respectively; alternatively, the first and second antennas may be antennas 3 and 4, respectively, and so on. For implementation of supporting one-path signal transmission and two-path signal transmission in a coverage overlapping area formed by communication coverage areas of the first antenna and the second antenna, reference may be made to the embodiment shown in fig. 4, which is not described herein again in this embodiment of the present application.
Or, for example, taking M ═ 4 as an example for explanation, that is, assuming that the multiple signal transmission system is specifically shown in fig. 5, receiving M channels of signals through M ports of the radio frequency module may specifically include: receive port 1 signals through port 1 of the radio frequency module, port 2 signals through port 2 of the radio frequency module, port 3 signals through port 3 of the radio frequency module, and port 4 signals through port 4 of the radio frequency module.
The method comprises the following steps that a coverage overlapping area is formed by communication coverage areas of S antennas in adjacent M antennas, the coverage overlapping area supports Q-path signal transmission, S takes any value from 2 to M, and Q takes all values from 1 to S, and specifically, the coverage overlapping area formed by the communication coverage areas of any two antennas in a first antenna, a second antenna, a third antenna and a fourth antenna supports one-path signal transmission and two-path signal transmission; a coverage overlapping area formed by the communication coverage range of any three antennas of the first antenna, the second antenna, the third antenna and the fourth antenna supports one-path signal transmission, two-path signal transmission and three-path signal transmission; a coverage overlapping area formed by communication coverage areas of the first antenna, the second antenna, the third antenna and the fourth antenna supports one-path signal transmission, two-path signal transmission, three-path signal transmission and four-path signal transmission; the first antenna, the second antenna, the third antenna and the fourth antenna are four adjacent antennas in the N antennas. For example, the first antenna, the second antenna, the third antenna, and the fourth antenna may be antenna 1, antenna 2, antenna 3, and antenna 4, respectively; alternatively, the first antenna, the second antenna, the third antenna, and the fourth antenna may be the antenna 3, the antenna 4, the antenna 5, and the antenna 6, respectively; alternatively, the first, second, third and fourth antennas may be antennas 5, 6, 7 and 8, respectively, and so on. The coverage overlapping area formed by the communication coverage areas of any two antennas of the first antenna, the second antenna, the third antenna and the fourth antenna supports one-path signal transmission and two-path signal transmission; a coverage overlapping area formed by the communication coverage range of any three antennas of the first antenna, the second antenna, the third antenna and the fourth antenna supports one-path signal transmission, two-path signal transmission and three-path signal transmission; for implementation of supporting one-path signal transmission, two-path signal transmission, three-path signal transmission, and four-path signal transmission in a coverage overlapping area formed by communication coverage areas of the first antenna, the second antenna, the third antenna, and the fourth antenna, reference may be made to the embodiment shown in fig. 5, which is not described herein again in this embodiment of the present application.
Based on the multi-channel signal transmission method provided by the embodiment of the application, downlink multi-channel signal transmission from the radio frequency module to the terminal can be realized.
As shown in fig. 7, another multiple signal transmission method provided for the embodiment of the present application is applied to any one of the multiple signal transmission systems shown in fig. 3 to fig. 5, and includes the following steps:
and S701, receiving M paths of signals through each antenna in the adjacent M antennas respectively. The communication coverage range of S antennas in the adjacent M antennas forms a coverage overlapping area, the coverage overlapping area supports Q-path signal transmission, S takes any value from 2 to M, and Q takes all values from 1 to S.
S702, transmitting the M paths of signals received by each antenna to a radio frequency module through a feeder connected with each antenna, and sending the M paths of signals through the radio frequency module.
Specifically, the radio frequency module may send the M channels of signals to the baseband module, and the baseband module processes the M channels of signals to obtain the S channels of signals, which is not specifically limited in this embodiment of the present application.
Since the coverage overlapping area formed by the communication coverage areas of S antennas in the adjacent M antennas supports Q-path signal transmission, Q may take the value of M, and therefore, each antenna may receive M-path signals.
For example, taking M ═ 2 as an example for explanation here, that is, assuming that the multi-channel signal transmission system is specifically shown in fig. 4, receiving M channels of signals through each antenna in adjacent M antennas respectively may specifically include: the two signals are received via a first antenna and the two signals are received via a second antenna.
Forming a coverage overlapping area by communication coverage areas of S antennas in adjacent M antennas, where the coverage overlapping area supports Q-path signal transmission, S takes any value from 2 to M, and Q takes all values from 1 to S, which may specifically include:
the coverage overlap area formed by the communication coverage of the first antenna and the second antenna supports one-way signal transmission and two-way signal transmission. The first antenna and the second antenna are two adjacent antennas in the N antennas. For example, the first antenna and the second antenna may be antenna 1 and antenna 2, respectively; alternatively, the first and second antennas may be antennas 2 and 3, respectively; alternatively, the first and second antennas may be antennas 3 and 4, respectively, and so on. For implementation of supporting one-path signal transmission and two-path signal transmission in a coverage overlapping area formed by communication coverage areas of the first antenna and the second antenna, reference may be made to the embodiment shown in fig. 4, which is not described herein again in this embodiment of the present application.
Or, for example, taking M ═ 4 as an example for explanation here, that is, assuming that the multiple signal transmission system is specifically shown in fig. 5, receiving M signals through each antenna in adjacent M antennas respectively may specifically include: the method includes receiving four signals via a first antenna, receiving four signals via a second antenna, receiving four signals via a third antenna, and receiving four signals via a fourth antenna.
The method comprises the following steps that a coverage overlapping area is formed by communication coverage areas of S antennas in adjacent M antennas, the coverage overlapping area supports Q-path signal transmission, S takes any value from 2 to M, and Q takes all values from 1 to S, and specifically, the coverage overlapping area formed by the communication coverage areas of any two antennas in a first antenna, a second antenna, a third antenna and a fourth antenna supports one-path signal transmission and two-path signal transmission; a coverage overlapping area formed by the communication coverage range of any three antennas of the first antenna, the second antenna, the third antenna and the fourth antenna supports one-path signal transmission, two-path signal transmission and three-path signal transmission; a coverage overlapping area formed by communication coverage areas of the first antenna, the second antenna, the third antenna and the fourth antenna supports one-path signal transmission, two-path signal transmission, three-path signal transmission and four-path signal transmission; the first antenna, the second antenna, the third antenna and the fourth antenna are four adjacent antennas in the N antennas. For example, the first antenna, the second antenna, the third antenna, and the fourth antenna may be antenna 1, antenna 2, antenna 3, and antenna 4, respectively; alternatively, the first antenna, the second antenna, the third antenna, and the fourth antenna may be the antenna 3, the antenna 4, the antenna 5, and the antenna 6, respectively; alternatively, the first, second, third and fourth antennas may be antennas 5, 6, 7 and 8, respectively, and so on. The coverage overlapping area formed by the communication coverage areas of any two antennas of the first antenna, the second antenna, the third antenna and the fourth antenna supports one-path signal transmission and two-path signal transmission; a coverage overlapping area formed by the communication coverage range of any three antennas of the first antenna, the second antenna, the third antenna and the fourth antenna supports one-path signal transmission, two-path signal transmission and three-path signal transmission; for implementation of supporting one-path signal transmission, two-path signal transmission, three-path signal transmission, and four-path signal transmission in a coverage overlapping area formed by communication coverage areas of the first antenna, the second antenna, the third antenna, and the fourth antenna, reference may be made to the embodiment shown in fig. 5, which is not described herein again in this embodiment of the present application.
Based on the multipath signal transmission method provided by the embodiment of the application, uplink multipath signal transmission from the terminal to the radio frequency module can be realized.
It is obvious to those skilled in the art that, for convenience and simplicity of description, the above division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions. For the specific working processes of the above-described system, device and unit, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a processor to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: u disk, removable hard disk, read only memory, random access memory, magnetic or optical disk, etc. for storing program codes.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. A Distributed Antenna System (DAS) is characterized in that the DAS comprises M circuit feeders and N antennas distributed at N positions, wherein M is a positive integer larger than or equal to 2, N is a positive integer, and N is larger than or equal to M;
each of the M feeder lines is respectively connected to different ports of M ports of the radio frequency module;
adjacent M antennas in the N antennas are respectively connected to different feeders in the M feeders, wherein a coverage overlapping area is formed by communication coverage areas of S antennas in the adjacent M antennas, the coverage overlapping area supports Q-path signal transmission, S takes any value from 2 to M, and Q takes all values from 1 to S; each antenna in the adjacent M antennas is configured to receive M channels of signals, the radio frequency module is configured to receive the M channels of signals through a feeder line connected to each antenna, and the radio frequency module is further configured to send the M channels of signals.
2. The DAS of claim 1, wherein if M is 2, M adjacent antennas of the N antennas are respectively connected to different ones of the M feeder lines, wherein a coverage overlap area is formed by communication coverage areas of S antennas of the M adjacent antennas, the coverage overlap area supporting Q-way signal transmission, S is any value from 2 to M, and Q is all values from 1 to S, comprising:
a first antenna of the N antennas is connected to a first feeder of the two feeders;
a second antenna of the N antennas is connected to a second feeder of the two feeders;
wherein the first antenna and the second antenna are two adjacent antennas of the N antennas;
the coverage overlapping area formed by the communication coverage areas of the first antenna and the second antenna supports one-way signal transmission and two-way signal transmission.
3. The DAS of claim 1, wherein if M is 4, M adjacent antennas of the N antennas are respectively connected to different ones of the M feeder lines, wherein a coverage overlap area is formed by coverage areas of S antennas of the M adjacent antennas, the coverage overlap area supporting Q-way signal transmission, S is any value from 2 to M, and Q is all values from 1 to S, comprising:
a first antenna of the N antennas is connected to a first feed of four feeds;
a second antenna of the N antennas is connected to a second feed of the four feeds;
a third antenna of the N antennas is connected to a third feed of the four feeds;
a fourth antenna of the N antennas is connected to a fourth feed of the four feeds;
wherein the first antenna, the second antenna, the third antenna, and the fourth antenna are four adjacent antennas of the N antennas;
a coverage overlapping area formed by communication coverage areas of any two antennas of the first antenna, the second antenna, the third antenna and the fourth antenna supports one-path signal transmission and two-path signal transmission;
a coverage overlapping area formed by communication coverage areas of any three of the first antenna, the second antenna, the third antenna and the fourth antenna supports one-path signal transmission, two-path signal transmission and three-path signal transmission;
a coverage overlap area formed by the communication coverage areas of the first antenna, the second antenna, the third antenna, and the fourth antenna supports one-way signal transmission, two-way signal transmission, three-way signal transmission, and four-way signal transmission.
4. The DAS of any one of claims 1-3, wherein the radio frequency module comprises a Radio Remote Unit (RRU) or a Radio Unit (RU).
5. A multi-channel signal transmission system comprising the radio frequency module and the DAS of any one of claims 1-4.
6. A multiplex signal transmission method applied to the multiplex signal transmission system according to claim 5, said method comprising:
receiving M paths of signals through M ports of the radio frequency module;
transmitting the M signals to the N antennas through the M feeder lines, respectively, and transmitting the M signals through the N antennas, where M adjacent antennas of the N antennas are connected to different feeder lines of the M feeder lines, respectively;
forming a coverage overlapping area by communication coverage ranges of S antennas in the M adjacent antennas, wherein the coverage overlapping area supports Q-path signal transmission, S takes any value from 2 to M, and Q takes all values from 1 to S;
respectively receiving M paths of signals through each antenna in the adjacent M antennas;
and transmitting the M paths of signals received by each antenna to the radio frequency module through a feeder line connected with each antenna, and sending the M paths of signals through the radio frequency module.
7. The method of claim 6, wherein if M is 2, a coverage overlap area is formed by communication coverage areas of S antennas in the M adjacent antennas, the coverage overlap area supports Q-path signal transmission, S takes any value from 2 to M, and Q takes all values from 1 to S, and the method comprises:
a coverage overlapping area formed by the communication coverage areas of the first antenna and the second antenna supports one-path signal transmission and two-path signal transmission;
wherein the first antenna and the second antenna are two adjacent antennas of the N antennas.
8. The method of claim 6, wherein if M is 4, a coverage overlap area is formed by communication coverage areas of S antennas in the M adjacent antennas, the coverage overlap area supports Q-path signal transmission, S takes any value from 2 to M, and Q takes all values from 1 to S, and the method comprises:
a coverage overlapping area formed by communication coverage areas of any two antennas of the first antenna, the second antenna, the third antenna and the fourth antenna supports one-path signal transmission and two-path signal transmission;
a coverage overlapping area formed by communication coverage areas of any three of the first antenna, the second antenna, the third antenna and the fourth antenna supports one-path signal transmission, two-path signal transmission and three-path signal transmission;
a coverage overlapping area formed by communication coverage areas of the first antenna, the second antenna, the third antenna and the fourth antenna supports one-way signal transmission, two-way signal transmission, three-way signal transmission and four-way signal transmission;
wherein the first antenna, the second antenna, the third antenna, and the fourth antenna are adjacent four antennas of the N antennas.
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| CN201611264706.4A CN108271170B (en) | 2016-12-30 | 2016-12-30 | Distributed antenna system, multi-channel signal transmission system and method |
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| CN201611264706.4A CN108271170B (en) | 2016-12-30 | 2016-12-30 | Distributed antenna system, multi-channel signal transmission system and method |
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| CN103337688A (en) * | 2006-08-18 | 2013-10-02 | 昆特尔科技有限公司 | Diversity antenna system with electrical tilt |
| CN104243004A (en) * | 2007-06-26 | 2014-12-24 | Lgc无线公司 | Distributed antenna communications system |
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