CN105792229B - Small cellular base station return transmission method and system based on distributed antennas - Google Patents
Small cellular base station return transmission method and system based on distributed antennas Download PDFInfo
- Publication number
- CN105792229B CN105792229B CN201410841447.1A CN201410841447A CN105792229B CN 105792229 B CN105792229 B CN 105792229B CN 201410841447 A CN201410841447 A CN 201410841447A CN 105792229 B CN105792229 B CN 105792229B
- Authority
- CN
- China
- Prior art keywords
- backhaul
- small cell
- distributed antenna
- base station
- antenna system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a method for deploying a small cellular base station in a DAS (distributed access system) and realizing backhaul transmission of an indoor small cellular base station by utilizing the existing DAS, and the realization scheme of the invention does not influence wireless access communication in the existing DAS, does not need to lay a specific cable or optical fiber for backhaul transmission, and does not need to find the position again to install the small cellular base station; therefore, the implementation scheme of the invention has low cost and quick deployment.
Description
Technical Field
The present invention relates to the field of wireless communication, and more particularly, to a backhaul transmission method and system for a small cell base station based on distributed antennas in the field of wireless communication.
Background
The concept of small cells has been widely accepted by telecom operators and equipment vendors. Usually, a plurality of small cells can be deployed in a macro cell to form a heterogeneous network, in which the small cells will shunt the traffic of the macro cell, so that the network capacity is increased without increasing macro cell sites, and the increasing coverage and capacity requirements of the mobile network are met at a high cost.
On the other hand, Distributed Antenna Systems (DAS) remain the main indoor coverage solution. In a DAS indoor coverage system, downlink wireless signals of a macro base station or a macro remote unit (RRH) are broadcast to an antenna through a DAS, and uplink wireless signals from the antenna are transmitted to the macro base station or the macro RRH through DAS aggregation.
The DAS system is mainly used for indoor macro cell coverage, and small cells are deployed in indoor macro cells to further improve system capacity.
In the prior art, a general indoor small cell deployment method needs to establish an independent backhaul transmission network, which can utilize the existing wired access technology, such as ethernet, and the transmission medium can be optical fiber or stranded wire. This deployment method requires re-pulling the fiber or strand in the building and finding a new installation location for the small cell base station. Therefore, the deployment cost is high, the installation is complex, and the consent of building owners is required. The invention will give how to deploy the small cell in DAS system and how to utilize the existing DAS system to realize the backhaul transmission of the indoor small cell base station, the implementation scheme of the invention does not affect the wireless access communication in the existing DAS, no matter the access network is 2G, 3G or 4G network, and no matter which access system; in addition to providing the necessary power lines, the present invention does not require the laying of special cables or optical fibers for backhaul transmission, nor relocation to install a small base station; therefore, the implementation scheme of the invention has low cost and quick deployment.
Disclosure of Invention
According to a first aspect of the invention, there is provided a method of deploying a small cell base station integrated in an antenna head of a macro cell antenna, the small cell base station being connected to a small cell backhaul access point via a distributed antenna system of the macro cell.
According to one embodiment of the invention, the backhaul signal of the small cell base station is transmitted back to the small cell backhaul access point through the distributed antenna system of the macro cell.
According to one embodiment of the invention, in a distributed antenna system for a macro cell, the frequency band of the small cell backhaul transmission is isolated from the frequency band of the macro cell.
According to one embodiment of the invention, the small cell base station comprises a small cell antenna, a small cell and a backhaul transmission unit, wherein one end of the backhaul transmission unit is connected with a distributed antenna system of a macro cell, and the other end of the backhaul transmission unit is connected with the small cell; the other end of the small base station is connected with a small cellular antenna.
According to an embodiment of the present invention, the small cell backhaul access point is a WiFi access point, and an antenna interface of the WiFi access point is connected to the distributed antenna system of the macro cell, and is configured to receive an uplink backhaul signal from the distributed antenna system of the macro cell or send a downlink backhaul signal to the distributed antenna system of the macro cell, where the backhaul signal is a WiFi wireless signal.
According to an embodiment of the present invention, the backhaul transmission unit of the small cell base station is a WiFi backhaul transmission unit, an antenna port of the WiFi backhaul transmission unit is connected to a distributed antenna system of a macro cell, and the WiFi backhaul transmission unit performs backhaul transmission with a WiFi access point through the distributed antenna system of the macro cell.
According to an embodiment of the present invention, the small cell backhaul access point is a specific small cell base station, and is a backhaul small cell base station, an antenna interface of the backhaul small cell base station is connected to the distributed antenna system of the macro cell, and is configured to receive an uplink backhaul signal from the distributed antenna system of the macro cell or transmit a downlink backhaul signal to the distributed antenna system of the macro cell, where the backhaul signal is a wireless signal under a wireless communication standard that the backhaul small cell base station follows.
According to an embodiment of the present invention, the backhaul transmission unit of the small cell base station is a small cell backhaul transmission unit, an antenna port of the small cell backhaul transmission unit is connected to a distributed antenna system of a macro cell, and the small cell backhaul transmission unit performs backhaul transmission with the backhaul small base station through the distributed antenna system of the macro cell.
According to one embodiment of the invention, the antenna head of the distributed antenna system of the macro cell is configured with a band-stop filter, and the stop band is a frequency band of backhaul transmission of the small cell.
According to a second aspect of the present invention, there is provided a small cell backhaul transmission system based on distributed antennas, the backhaul transmission system comprising at least one small cell backhaul access point, at least one macro cell distributed antenna system, and at least one small cell base station, the small cell base station being integrated in an antenna head of the distributed antenna system, the small cell base station being connected to the small cell backhaul access point through the macro cell distributed antenna system.
According to one embodiment of the invention, the distributed antenna system is configured to transmit backhaul signals from the small cell base station back to the small cell backhaul access point.
According to one embodiment of the invention, in a distributed antenna system for a macro cell, the frequency band of the small cell backhaul transmission is isolated from the frequency band of the macro cell.
According to one embodiment of the invention, the small cell base station comprises a small cell antenna, a small cell and a backhaul transmission unit, wherein one end of the backhaul transmission unit is connected with a distributed antenna system of a macro cell, and the other end of the backhaul transmission unit is connected with the small cell; the other end of the small base station is connected with a small cellular antenna.
According to an embodiment of the present invention, the small cell backhaul access point is a WiFi access point, and an antenna interface of the WiFi access point is connected to the distributed antenna system of the macro cell, and is configured to receive an uplink backhaul signal from the distributed antenna system of the macro cell or send a downlink backhaul signal to the distributed antenna system of the macro cell, where the backhaul signal is a WiFi wireless signal.
According to an embodiment of the present invention, the backhaul transmission unit of the small cell base station is a WiFi backhaul transmission unit, an antenna port of the WiFi backhaul transmission unit is connected to a distributed antenna system of a macro cell, and the WiFi backhaul transmission unit performs backhaul transmission with a WiFi access point through the distributed antenna system of the macro cell.
According to an embodiment of the present invention, the backhaul access point comprises a backhaul traffic aggregation unit configured to aggregate backhaul signals from different small cell base stations.
According to one embodiment of the invention, the backhaul access point identifies the small cell base station by an IP address and a MAC address.
According to one embodiment of the invention, the backhaul service convergence unit is located at an application layer of a protocol stack, and a lower layer protocol is a WiFi protocol stack.
According to one embodiment of the invention, the plurality of backhaul access points operate at different frequencies by frequency hopping.
According to an embodiment of the present invention, the small cell backhaul access point is a specific small cell base station, and is a backhaul small cell base station, and an antenna interface of the backhaul small cell base station is connected to the distributed antenna system of the macro cell, and is configured to receive an uplink backhaul signal from the distributed antenna system of the macro cell and transmit a downlink backhaul signal to the distributed antenna system of the macro cell.
According to an embodiment of the present invention, the backhaul transmission unit of the small cell base station is a small cell backhaul transmission unit, an antenna port of the small cell backhaul transmission unit is connected to a distributed antenna system of the macro cell, and the small cell backhaul transmission unit performs backhaul transmission with the backhaul small base station through the distributed antenna system of the macro cell.
According to one embodiment of the invention, the antenna head of the distributed antenna system of the macro cell is configured with a band-stop filter, and the stop band is a frequency band of backhaul transmission of the small cell.
According to one embodiment of the invention, when the distributed antenna system is connected with a plurality of small cell base stations, the small cell backhaul transmission units of the plurality of small cell base stations work in different time-frequency resources.
According to an embodiment of the present invention, when at least two groups of small cell base stations in the system respectively perform backhaul transmission through two or more distributed antenna systems, the two or more distributed antenna systems form a mimo antenna array, wired channels of the distributed antenna systems are orthogonal to each other, and the wired channel of each distributed antenna system is used for backhaul transmission of at least one group of small cells.
According to a third aspect of the present invention, there is provided a backhaul transmission method for a small cell base station based on a distributed antenna, the small cell base station being integrated in an antenna head of a macro cell antenna, the small cell base station transmitting a backhaul signal to a small cell backhaul access point through a distributed antenna system of the macro cell.
According to one embodiment of the invention, in a distributed antenna system for a macro cell, the frequency band of the small cell backhaul transmission is isolated from the frequency band of the macro cell.
According to one embodiment of the invention, the small cell base station comprises a small cell antenna, a small cell and a backhaul transmission unit, wherein one end of the backhaul transmission unit is connected with a distributed antenna system of a macro cell, and the other end of the backhaul transmission unit is connected with the small cell; the other end of the small base station is connected with a small cellular antenna.
According to an embodiment of the present invention, the small cell backhaul access point is a WiFi access point, and an antenna interface of the WiFi access point is connected to the distributed antenna system of the macro cell, and is configured to receive an uplink backhaul signal from the distributed antenna system of the macro cell or send a downlink backhaul signal to the distributed antenna system of the macro cell, where the backhaul signal is a WiFi wireless signal.
According to an embodiment of the present invention, the backhaul transmission unit of the small cell base station is a WiFi backhaul transmission unit, an antenna port of the WiFi backhaul transmission unit is connected to a distributed antenna system of a macro cell, and the WiFi backhaul transmission unit performs backhaul transmission with a WiFi access point through the distributed antenna system of the macro cell.
According to an embodiment of the present invention, the small cell backhaul access point is a specific small cell base station, and is a backhaul small cell base station, and an antenna interface of the backhaul small cell base station is connected to the distributed antenna system of the macro cell, and is configured to receive a backhaul signal from the distributed antenna system of the macro cell, where the backhaul signal is a wireless signal under a wireless communication standard that the backhaul small cell base station conforms to.
According to an embodiment of the present invention, the backhaul transmission unit of the small cell base station is a small cell backhaul transmission unit, an antenna port of the small cell backhaul transmission unit is connected to a distributed antenna system of a macro cell, and the small cell backhaul transmission unit performs backhaul transmission with the backhaul small base station through the distributed antenna system of the macro cell.
According to one embodiment of the invention, the antenna head of the distributed antenna system of the macro cell is configured with a band-stop filter, and the stop band is a frequency band of backhaul transmission of the small cell.
According to a fourth aspect of the present invention, there is provided a distributed antenna system, one end of which is connected to the antenna head of at least one macro-cell antenna and to the antenna head of at least one macro-cell antenna integrated with a small-cell base station; the other end of the distributed antenna system is connected to at least one backhaul access point.
According to one embodiment of the invention, the backhaul signals of the small cell base station are transmitted to the backhaul access point through the distributed antenna system.
According to one embodiment of the invention, the backhaul signal of the small cell base station is a WiFi signal.
According to one embodiment of the invention, the backhaul signals of the small cell base station are wireless signals of a small cell system, including uplink and downlink signals.
According to one embodiment of the invention, the antenna head of the macro cell is configured with a band-stop filter, and the stop band is a frequency band of backhaul transmission of the small cell.
According to one embodiment of the invention, in the distributed antenna system, the frequency band of backhaul transmission of the small cell is isolated from the frequency band of the macro cell.
According to an embodiment of the present invention, when the two or more distributed antenna systems perform backhaul transmission, the two or more distributed antenna systems form a mimo antenna array, wired channels of the distributed antenna systems are orthogonal to each other, and the wired channel of each distributed antenna system is used for backhaul transmission of at least one group of small cells.
According to a fifth aspect of the present invention, there is provided an antenna head for operation in a macrocellular system, the antenna head incorporating a small cell base station.
According to one embodiment of the invention, the small cell base station comprises a small cell antenna, a small cell and a return transmission unit, wherein one end of the return transmission unit is connected with an antenna system of a macro cell, and the other end of the return transmission unit is connected with the small cell; the other end of the small base station is connected with a small cellular antenna.
According to one embodiment of the invention, the antenna head of the macro cell is configured with a band-stop filter, and the stop band is a frequency band of backhaul transmission of the small cell.
According to one embodiment of the invention, the frequency band of the small cell is isolated from the frequency band of the macro cell.
According to a sixth aspect of the present invention, there is provided a small cell base station integrated on an antenna head of a macro cell, the small cell base station transmitting an uplink backhaul signal to a small cell backhaul access point and a downlink backhaul signal to the small cell base station through a distributed antenna system of the macro cell.
According to one embodiment of the invention, the frequency band of the small cell backhaul transmission is isolated from the frequency band of the macro cell.
According to one embodiment of the invention, the small cell base station comprises a small cell antenna, a small cell and a backhaul transmission unit, wherein one end of the backhaul transmission unit is connected with a distributed antenna system of a macro cell, and the other end of the backhaul transmission unit is connected with the small cell; the other end of the small base station is connected with a small cellular antenna.
According to an embodiment of the present invention, the backhaul transmission unit of the small cell base station is a WiFi backhaul transmission unit, an antenna port of the WiFi backhaul transmission unit is connected to a distributed antenna system of a macro cell, and the WiFi backhaul transmission unit performs backhaul transmission with a WiFi access point through the distributed antenna system of the macro cell.
According to an embodiment of the present invention, the backhaul transmission unit of the small cell base station is a small cell backhaul transmission unit, an antenna port of the small cell backhaul transmission unit is connected to a distributed antenna system of a macro cell, and the small cell backhaul transmission unit performs backhaul transmission with the backhaul small base station through the distributed antenna system of the macro cell.
Drawings
Other features, objects and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments thereof, which proceeds with reference to the accompanying drawings.
Fig. 1 shows a DAS-based small cell backhaul transmission and antenna head schematic;
fig. 2 shows a schematic diagram of a transmission path where one backhaul AP serves multiple small cells;
fig. 3 shows a DAS system based backhaul transmission diagram with a multi-backhaul Access Point (AP);
fig. 4 shows a DAS-based small cell backhaul transport diagram for WiFi as the backhaul transport protocol;
fig. 5 shows a protocol stack diagram for supporting multi-small cell backhaul with WiFi as the backhaul transport protocol;
fig. 6 shows a schematic diagram of backhaul transmission in closed mode;
fig. 7 is a schematic diagram illustrating the relationship between the backhaul transmission frequency band and the operating frequency band of the repeater in the closed mode;
fig. 8 shows a DAS-based small cell backhaul transmission diagram in closed mode;
fig. 9 shows a comparison of the small cell base station deployment method of the present invention with a conventional small cell base station deployment method.
In the drawings, like or similar reference numerals designate like or similar means (elements) or steps throughout the different views.
Detailed Description
In the following detailed description of the preferred embodiments, reference is made to the accompanying drawings which form a part hereof. The accompanying drawings illustrate, by way of example, specific embodiments in which the invention may be practiced. The illustrated embodiments are not intended to be exhaustive of all embodiments according to the invention. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention is defined by the appended claims. It should be noted that although the steps of methods of the present invention are depicted in the drawings in a particular order, this does not require or imply that these operations must be performed in this particular order, or that all of the illustrated operations must be performed, to achieve desirable results, but rather that the steps described herein can be performed in an order that varies. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions.
Fig. 1 shows a schematic diagram of a DAS-based backhaul transmission and antenna head of a small cell, and the present invention utilizes an existing DAS system, which includes radio frequency cables, various passive devices (such as couplers, power splitters, etc.) and active devices (such as amplifiers, etc.). The DAS is connected with at least one macro-cellular antenna head and at least one macro-cellular antenna head integrated with a small-cell base station; the backhaul access point is placed at the side of the DAS base station, and an antenna interface of the backhaul AP is connected to the DAS, and may receive backhaul uplink signals from the DAS or may transmit backhaul downlink signals through the DAS. In the present invention, the signal transmission of the backhaul transmission element and the backhaul access point is similar to the relationship of the terminal and the base station/access point, and therefore is often also referred to as the backhaul terminal element, the backhaul transmission element is used for backhaul transmission, its antenna port is also connected to the DAS, and the backhaul transmission element of the small cell base station communicates with the backhaul AP through the DAS. In the present invention, a DAS system may have a plurality of small cell base stations, each integrated into a macro cell antenna head, whose backhaul transmissions share a DAS wired channel. Additionally the DAS system is shared by the macro cell's wireless signals and the small cell's backhaul signals. In order to avoid mutual interference between signals, the frequency band of backhaul transmission of the small cell should be isolated from the frequency band of the macro cell, and meanwhile, in order to reduce implementation cost, the backhaul transmission can adopt a mature wireless access technology, but the backhaul transmission on the DAS is not excluded from other technologies. In addition, because the present invention uses the existing DAS system to perform backhaul transmission of the small cell base station, in order to avoid mutual interference between signals, the frequency band of backhaul transmission of the small cell should be separated from the frequency band of the macro cell. The frequency band of the small cell backhaul transmission may be a licensed frequency band of an operator or a free frequency band. The backhaul transmission frequency band of the small cell may be the same as the wireless access frequency band of the small cell, but in this case, backhaul transmission signals should be limited in the DAS system to avoid radiating on an air interface and interfering with wireless access of the small cell.
Fig. 2 shows a DAS system based backhaul transmission diagram with a multi-backhaul Access Point (AP). In the backhaul access point AP, there is a backhaul traffic aggregation unit, which aggregates backhaul traffic from different small cells and is responsible for managing and configuring the small cells. When there are more small cells in the DAS system, it is difficult for one backhaul access point AP to meet the backhaul traffic demand of these small cells, and in a DAS system, there may be multiple backhaul access points APs, where each AP will be responsible for the backhaul transmission of a group of small cells. As shown in fig. 3.
The small cell backhaul transmission may be in open mode or closed mode.
In the open mode, backhaul signals transmitted in the DAS may be radiated to the air interface through antennas on the DAS, and although an operator may purchase a frequency band specifically for backhaul transmission, the cost is obviously unacceptable, and therefore, in this mode, it is most economical to select a WiFi access technology operating in a free frequency band. A WiFi network near the DAS can enter a backhaul transmission channel through the DAS antenna, but a backhaul transmission AP avoids collision through a CSMA/CA mechanism inherent in the WiFi. Generally, through the DAS antenna, WiFi devices near the DAS can also detect the existence of the backhaul AP, but the backhaul AP can reject the access of external WiFi devices through an authentication mechanism, and only WiFi terminals of small cells are allowed to access the backhaul AP. Since the backhaul transmission signal exists only on the DAS wired channel of high quality, the rate of backhaul transmission is high enough to guarantee the capacity requirement of multiple small cells. When many small cells are connected to the DAS and one backhaul AP cannot meet the capacity and delay requirements of backhaul transmission of these small cells, multiple backhaul APs may be used on the DAS, each serving a group of small cells, as shown in fig. 3, backhaul AP1 serving small cells 1 and 3, and backhaul AP2 serving small cells 2 and 4.
Fig. 4 shows a DAS-based backhaul transmission diagram of a small cell using WiFi as a backhaul transmission protocol, where the backhaul access point is a WiFi AP and WiFi signals are transmitted on the DAS system. In the backhaul access point WiFi AP, there is a backhaul traffic aggregation unit, which aggregates backhaul traffic from different small cells and is responsible for managing and configuring the small cells. In the system initialization phase, the convergence unit establishes connection with each small cell base station, and the backhaul AP identifies the small cell base stations through IP addresses and MAC addresses. The convergence unit is in the application layer of the protocol stack, the lower layer protocol utilizes the existing WiFi protocol stack, which simplifies the system implementation, and fig. 5 shows a backhaul transport protocol station with the convergence layer. One WiFi channel can support backhaul transmission of a plurality of small cells through a convergence unit. When there are more small cells in the DAS system, it is difficult for one backhaul access point AP to meet the backhaul traffic demand of these small cells, and in one DAS system, multiple backhaul access points AP may be used, which operate on different frequencies and on different channels through frequency hopping without interfering with each other, where each AP is responsible for backhaul transmission of a group of small cells.
Besides the WiFi access technology adopting the open technology, the small cell backhaul may also adopt the access technology of the small cell itself, and the mode of performing backhaul transmission by adopting the access technology of the small cell itself is called a closed mode. Fig. 6 shows a schematic diagram of backhaul transmission in a closed mode, that is, backhaul transmission of other small cells is implemented by using a specific small cell base station, which is called a backhaul small base station, and a small cell base station performing wireless access is called an access small base station, that is, backhaul transmission and wireless access both use the same technology, backhaul transmission operates in a DAS wired medium, and wireless access operates on an air interface, and since the backhaul small base station operates only in a DAS wired environment and does not radiate onto the air interface, interference does not occur to the access small base station, and in addition, since the quality of a wired DAS transmission channel is very good enough to ensure a communication bandwidth of backhaul transmission, one backhaul small base station can support multiple access small base stations. The backhaul small base station is only responsible for the backhaul of other access small base stations, the access small base station is equivalent to user terminal equipment of the backhaul small base station, the backhaul small base station is a cascade of small base stations, the backhaul small base station and the access small base station can work on the same frequency spectrum, at the moment, all antenna heads in the DAS need to be upgraded, and through inserting a band elimination filter, the phenomenon that a backhaul signal leaks to an air interface to interfere with an access small cell is avoided.
When the DAS is a conventional repeater system or an active DAS system, a small cell should be used as backhaul transmission due to a narrow operating band, and a suitable operating band is selected, which is not only within the operating band of the DAS but also cannot collide with a macro cell signal in the DAS. However, the free frequency bands where the WiFi system operates are not necessarily supported by the DAS systems. Fig. 7 shows the relationship between backhaul transmission frequency band and repeater operating frequency band, wherein the macro cell operates in f1 frequency band, and the backhaul small cell operates in f2 frequency band. Both of which are within the repeater operating band.
In the closed mode, the backhaul signal is closed in the DAS and does not leak to the air interface, so an operator can reuse its licensed frequency band as backhaul transmission of a small cell and reuse it on a wired channel and a wireless channel. The backhaul base station may use a high capacity access technology, such as LTE. A typical application is that the backhaul base station and the small cell base station use the same frequency band and the same access technology to form a small cell cascade. Fig. 8 shows a schematic diagram of DAS-based small cell backhaul transmission, and an antenna head integrated with a small cell base station. In closed mode, the backhaul cell is responsible for the backhaul transmissions of other access cells, all operating on the same frequency f 1. The backhaul small base station operates in a DAS wired channel, and the access small base station operates in a wireless air interface channel. In order to avoid interference, all antennas on the DAS integrate band-stop filters to isolate the wired DAS channel from the wireless air interface channel, and the band-stop filters only prevent the f1 frequency from passing through, while the signals of other macrocells are not affected. In the closed mode, all DAS antenna heads are replaced, and there are two new antenna heads, one is an antenna head integrated with a small cell base station, and the other is an antenna head with a band-stop isolation filter, as shown in fig. 8. The antenna head integrated with the small cell base station comprises a macro antenna, a band-stop filter, the small cell antenna, the small cell base station and a return terminal. In fact, the backhaul terminal is a special user terminal device, and is dedicated to backhaul transmission of the small cell. When a plurality of small cells are connected in the DAS, the backhaul terminals of the small cells share the DAS wired channel and work on different time-frequency resources, the convergence unit of the backhaul terminal converges backhaul signals of different small cell base stations, and the backhaul small cell base station is responsible for scheduling the DAS wired channel. Also, due to the high quality of the DAS wired channel, one backhaul base station can support backhaul transmission of multiple small cells. In addition, the small cell base station can supply power through DAS coaxial cables or can supply power through an independent power line.
When some indoor coverage systems support MIMO transmission, there are often two parallel DAS networks to support 2x2 MIMO, and then backhaul transmission can also implement MIMO transmission on two parallel DASs. However, different from the air interface, the two wired channels are completely orthogonal, and therefore, the two channels may also be used for backhaul transmission respectively, and each channel is used for backhaul transmission of two different groups of small cells.
The invention provides a simple and rapid deployment mode of small cells, and the small cells are integrated into the antenna head, so that the deployment of the small cells can be completed by replacing the existing antenna head, the deployment is very simple, and the existing macro-cell signals in the DAS are not influenced. In addition to providing the necessary power supply lines, the present invention does not require special cabling or fiber optics for backhaul transmission, nor relocation to install the small base station, and indeed, if the DAS coaxial line is used to provide power, i.e. the small base station on the antenna head is powered by coaxial cable, e.g. 12V or 48V dc, then there is no need to pull additional power to the antenna head, which makes deployment easier. Fig. 9 shows the simplicity of the present invention compared to the conventional small cell base station deployment approach.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. Furthermore, it will be obvious that the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. Several elements recited in the apparatus claims may also be implemented by one element. The terms first, second, etc. are used to denote names, but not any particular order.
Claims (42)
1. A deployment method of a small cell base station is disclosed, wherein the small cell base station is integrated in an antenna head of a macro cell antenna, the small cell base station is connected with a small cell backhaul access point through a distributed antenna system of a macro cell, the small cell backhaul access point is one of a backhaul small cell and a WiFi access point, and an antenna interface of the small cell backhaul access point is connected to the distributed antenna system of the macro cell and used for receiving uplink backhaul signals from the distributed antenna system of the macro cell or sending downlink backhaul signals to the distributed antenna system of the macro cell.
2. The method of claim 1, wherein backhaul signals of the small cell base station are transmitted back to the small cell backhaul access point through a distributed antenna system of the macro cell.
3. The method of claim 1, wherein a frequency band of the small cell backhaul transmission is isolated from a frequency band of the macro cell in the distributed antenna system of the macro cell.
4. The method of claim 1, wherein the small cell base station comprises a small cell antenna, a small cell base station and a backhaul transmission unit, one end of the backhaul transmission unit is connected with a distributed antenna system of the macro cell, and the other end of the backhaul transmission unit is connected with the small cell base station; the other end of the small base station is connected with a small cellular antenna.
5. The method of claim 1, wherein the small cell backhaul access point is a WiFi access point, and an antenna interface of the WiFi access point is connected to the distributed antenna system of the macro cell for receiving uplink backhaul signals from the distributed antenna system of the macro cell or transmitting downlink backhaul signals to the distributed antenna system of the macro cell, and the backhaul signals are WiFi wireless signals.
6. The method of claim 4, wherein the backhaul transmission unit of the small cell base station is a WiFi backhaul transmission unit, an antenna port of the WiFi backhaul transmission unit is connected to a distributed antenna system of the macro cell, and the WiFi backhaul transmission unit performs backhaul transmission with the WiFi access point through the distributed antenna system of the macro cell.
7. The method of claim 1, wherein the small cell backhaul access point is the backhaul small cell, and an antenna interface of the backhaul small cell is connected to a distributed antenna system of the macro cell, and is configured to receive an uplink backhaul signal from the distributed antenna system of the macro cell or transmit a downlink backhaul signal to the distributed antenna system of the macro cell, and the backhaul signal is a wireless signal of the backhaul small cell in accordance with a wireless communication standard.
8. The method of claim 7, wherein the backhaul transmission unit of the small cell base station is a small cell backhaul transmission unit, an antenna port of the small cell backhaul transmission unit is connected to a distributed antenna system of the macro cell, and the small cell backhaul transmission unit performs backhaul transmission with the backhaul small base station through the distributed antenna system of the macro cell.
9. The method of claim 7 or 8, wherein the antenna head of the distributed antenna system of the macro cell is configured with a band-reject filter, and the reject band is a frequency band of a backhaul transmission of the small cell.
10. A small cell backhaul transmission system based on a distributed antenna system comprises at least one small cell backhaul access point, at least one macro cell distributed antenna system and at least one small cell base station, wherein the small cell base station is integrated in an antenna head of the distributed antenna system, the small cell base station is connected with the small cell backhaul access point through the macro cell distributed antenna system, the small cell backhaul access point is one of a backhaul small cell base station and a WiFi access point, and an antenna interface of the small cell backhaul access point is connected to the distributed antenna system of a macro cell and used for receiving uplink backhaul signals from the distributed antenna system of the macro cell or sending downlink backhaul signals to the distributed antenna system of the macro cell.
11. The backhaul transmission system of claim 10, the distributed antenna system configured to transmit backhaul signals from a small cell base station back to a small cell backhaul access point.
12. The backhaul transmission system of claim 10, wherein a frequency band of the backhaul transmission of the small cell is isolated from a frequency band of the macro cell in the distributed antenna system of the macro cell.
13. The backhaul transmission system of claim 10, wherein the small cell base station comprises a small cell antenna, a small cell base station, and a backhaul transmission unit, one end of the backhaul transmission unit is connected to the distributed antenna system of the macro cell, and the other end of the backhaul transmission unit is connected to the small cell base station; the other end of the small base station is connected with a small cellular antenna.
14. The backhaul transmission system of claim 10, wherein the small cell backhaul access point is a WiFi access point, and an antenna interface of the WiFi access point is connected to the distributed antenna system of the macro cell, for receiving uplink backhaul signals from the distributed antenna system of the macro cell or transmitting downlink backhaul signals to the distributed antenna system of the macro cell, and the backhaul signals are WiFi wireless signals.
15. The backhaul transmission system of claim 13, wherein the backhaul transmission unit of the small cell base station is a WiFi backhaul transmission unit, an antenna port of the WiFi backhaul transmission unit is connected to a distributed antenna system of the macro cell, and the WiFi backhaul transmission unit performs backhaul transmission with a WiFi access point through the distributed antenna system of the macro cell.
16. The backhaul transmission system of claim 14, wherein the backhaul access point comprises a backhaul traffic aggregation unit configured to aggregate backhaul signals from different small cell base stations.
17. The backhaul transmission system of claim 14, the backhaul access point identifying a small cell base station by an IP address and a MAC address.
18. The backhaul transport system of claim 16, wherein the backhaul traffic convergence unit is at an application layer of a protocol stack, and the lower layer protocol is a WiFi protocol stack.
19. The backhaul transmission system of claim 14, wherein the plurality of backhaul access points operate at different frequencies by frequency hopping.
20. The backhaul transmission system of claim 10, wherein the small cell backhaul access point is the backhaul small cell, and an antenna interface of the backhaul small cell is connected to a distributed antenna system of a macro cell, and is configured to receive an uplink backhaul signal from the distributed antenna system of the macro cell or transmit a downlink backhaul signal to the distributed antenna system of the macro cell.
21. The backhaul transport system of claim 20, wherein the backhaul transport unit of the small cell base station is a small cell backhaul transport unit, an antenna port of the small cell backhaul transport unit is connected to a distributed antenna system of the macro cell, and the small cell backhaul transport unit performs backhaul transport with the backhaul small base station through the distributed antenna system of the macro cell.
22. The backhaul transmission system of claim 20 or 21, wherein the antenna head of the macro-cellular distributed antenna system is configured with a band-reject filter, and the reject band is a frequency band of the small-cell backhaul transmission.
23. The backhaul transmission system of claim 20, wherein when a plurality of small cell base stations are connected to the distributed antenna system, the small cell backhaul transmission units of the plurality of small cell base stations operate on different time-frequency resources.
24. The backhaul transmission system of claim 10, wherein when at least two groups of small cell base stations in the system perform backhaul transmission through two or more distributed antenna systems, respectively, the two or more distributed antenna systems form a mimo antenna array, wired channels of the distributed antenna systems are orthogonal to each other, and the wired channel of each distributed antenna system is used for backhaul transmission of at least two groups of small cells.
25. A backhaul transmission method of a small cell base station based on a distributed antenna system, the small cell base station is integrated in an antenna head of a macro cell antenna, the small cell base station transmits backhaul signals to a small cell backhaul access point through the distributed antenna system of the macro cell, the small cell backhaul access point is one of a backhaul small cell and a WiFi access point, and an antenna interface of the small cell backhaul access point is connected to the distributed antenna system of the macro cell and is used for receiving uplink backhaul signals from the distributed antenna system of the macro cell or sending downlink backhaul signals to the distributed antenna system of the macro cell.
26. The method of claim 25, wherein the frequency band of the small cell backhaul transmission is isolated from the frequency band of the macro cell in the distributed antenna system of the macro cell.
27. The method of claim 25, wherein the small cell base station comprises a small cell antenna, a small cell base station and a backhaul transmission unit, one end of the backhaul transmission unit is connected with the distributed antenna system of the macro cell, and the other end of the backhaul transmission unit is connected with the small cell base station; the other end of the small base station is connected with a small cellular antenna.
28. The method of claim 25, wherein the small cell backhaul access point is a WiFi access point, and an antenna interface of the WiFi access point is connected to the distributed antenna system of the macro cell for receiving uplink backhaul signals from the distributed antenna system of the macro cell or transmitting downlink backhaul signals to the distributed antenna system of the macro cell, and the backhaul signals are WiFi wireless signals.
29. The method of claim 28, wherein the backhaul transmission unit of the small cell base station is a WiFi backhaul transmission unit, an antenna port of the WiFi backhaul transmission unit is connected to a distributed antenna system of the macro cell, and the WiFi backhaul transmission unit performs backhaul transmission with the WiFi access point through the distributed antenna system of the macro cell.
30. The method of claim 25, the small cell backhaul access point is the backhaul small cell, and an antenna interface of the backhaul small cell is connected to a distributed antenna system of the macro cell for receiving backhaul signals from the distributed antenna system of the macro cell, the backhaul signals being wireless signals under a wireless communication standard followed by the backhaul small cell.
31. The method of claim 30, wherein the backhaul transmission unit of the small cell base station is a small cell backhaul transmission unit, an antenna port of the small cell backhaul transmission unit is connected to a distributed antenna system of the macro cell, and the small cell backhaul transmission unit performs backhaul transmission with the backhaul small base station through the distributed antenna system of the macro cell.
32. The method of claim 30 or 31, the antenna head of the distributed antenna system of the macro cell being configured with a band-reject filter, the reject band being a frequency band of a small cell backhaul transmission.
33. One end of the distributed antenna system is connected with an antenna head of at least one macro cellular antenna and is connected with an antenna head of at least one macro cellular antenna integrated with a small cellular base station; the other end of the distributed antenna system is connected with at least one return access point, when two or more distributed antenna systems carry out return transmission, the two or more distributed antenna systems form a multi-input multi-output antenna array, wired channels of the distributed antenna systems are mutually orthogonal, and the wired channel of each distributed antenna system is used for return transmission of at least one group of small cells.
34. The distributed antenna system of claim 33, wherein backhaul signals of the small cell base station are transmitted to a backhaul access point through the distributed antenna system.
35. The distributed antenna system of claim 33, wherein the backhaul signal of the small cell base station is a WiFi signal.
36. The distributed antenna system of claim 33, wherein the backhaul signals of the small cell base station are wireless signals of the small cell system, including uplink and downlink signals.
37. The distributed antenna system of claim 36, wherein the antenna head of the macrocell antenna integrated with the small cell base station is configured with a band reject filter that is a frequency band of small cell backhaul transmission.
38. The distributed antenna system of claim 34, wherein frequency bands of small cell backhaul transmissions are isolated from frequency bands of macro cells.
39. A small cell base station integrated on an antenna head of a macro cell, the small cell base station comprising a small cell antenna, a small cell and a backhaul transmission unit, the backhaul transmission unit having one end connected to a distributed antenna system of the macro cell and the other end connected to the small cell, the small cell base station having the other end connected to the small cell antenna, the small cell base station transmitting an uplink backhaul signal to a small cell backhaul access point through the distributed antenna system of the macro cell, and the small cell backhaul access point transmitting a downlink backhaul signal to the small cell base station.
40. The small cell base station of claim 39, wherein the frequency band of the small cell backhaul transmission is isolated from the frequency band of the macro cell.
41. The small cell base station of claim 39, wherein the backhaul transport unit of the small cell base station is a WiFi backhaul transport unit, an antenna port of the WiFi backhaul transport unit is connected to a distributed antenna system of the macro cell, and the WiFi backhaul transport unit performs backhaul transport with a WiFi access point through the distributed antenna system of the macro cell.
42. The small cell base station of claim 39, wherein the small cell backhaul access point is a backhaul small cell, the backhaul transmission unit of the small cell base station is a small cell backhaul transmission unit, an antenna port of the small cell backhaul transmission unit is connected to the distributed antenna system of the macro cell, and the small cell backhaul transmission unit performs backhaul transmission with the backhaul small cell through the distributed antenna system of the macro cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410841447.1A CN105792229B (en) | 2014-12-25 | 2014-12-25 | Small cellular base station return transmission method and system based on distributed antennas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410841447.1A CN105792229B (en) | 2014-12-25 | 2014-12-25 | Small cellular base station return transmission method and system based on distributed antennas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105792229A CN105792229A (en) | 2016-07-20 |
| CN105792229B true CN105792229B (en) | 2021-08-31 |
Family
ID=56389685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410841447.1A Active CN105792229B (en) | 2014-12-25 | 2014-12-25 | Small cellular base station return transmission method and system based on distributed antennas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105792229B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10573144B2 (en) | 2016-10-10 | 2020-02-25 | Netgear, Inc. | Changing topology in a wireless network |
| EP4246768A3 (en) * | 2016-11-15 | 2023-11-01 | Wilson Electronics, LLC | Desktop signal booster |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011066426A1 (en) * | 2009-11-25 | 2011-06-03 | Mobileaccess Networks Ltd. | Method and system for integrating an rf module into a digital network access point |
| JP5583035B2 (en) * | 2011-01-06 | 2014-09-03 | 株式会社日立製作所 | Wireless system and wireless communication method |
| US8831619B2 (en) * | 2011-07-21 | 2014-09-09 | Alcatel Lucent | Method of sharing information between base stations associated with different network technologies and the base stations |
| CN102300220B (en) * | 2011-09-16 | 2014-01-01 | 华为技术有限公司 | Method and device for determining deployment position of micro base station |
| US9801099B2 (en) * | 2013-05-15 | 2017-10-24 | Blackberry Limited | Method and system for use of cellular infrastructure to manage small cell access |
| CN103906246B (en) * | 2014-02-25 | 2017-06-30 | 北京邮电大学 | A kind of wireless backhaul resource regulating method under honeycomb heterogeneous network |
-
2014
- 2014-12-25 CN CN201410841447.1A patent/CN105792229B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105792229A (en) | 2016-07-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102067102B1 (en) | Small cell network architecture for servicing multiple network operators | |
| US9191098B2 (en) | Capability reporting for relay nodes in wireless networks | |
| US8798525B2 (en) | Composite reporting of wireless relay power capability | |
| CN101517924B (en) | System for and method of for providing dedicated capacity in a cellular network | |
| CN110351765B (en) | Monitoring in a wireless backhaul network | |
| US9425914B2 (en) | Method and device for relay deployment in a TDD communication network | |
| KR101904591B1 (en) | Methods and network nodes for communication between a first network node and a second network node over a twisted pair wire | |
| US11533780B2 (en) | Wireless backbone and structured wireless | |
| WO2014106539A1 (en) | Method of adaptive antenna beam forming for wireless base station in-channel self-backhauling | |
| US9906302B2 (en) | Distribution network for a distributed antenna system | |
| US10498039B2 (en) | Base station | |
| US10707955B2 (en) | Methods and nodes of a distributed base station system for improved downlink transmission | |
| WO2012019560A1 (en) | Method, system and wireless communication device for auxiliary transmission to adjacent channels | |
| CN106211175B (en) | Method, device and system for configuring working frequency band of base station | |
| US20230070695A1 (en) | Wireless backbone and structured wireless | |
| EP2819318B1 (en) | Repeater system and method for operating said system | |
| CN105792229B (en) | Small cellular base station return transmission method and system based on distributed antennas | |
| WO2016160894A1 (en) | Multiple service distributed-antenna system | |
| US10756786B1 (en) | Systems and methods for providing isolation for antennas in a wireless communication system | |
| EP2664213A1 (en) | Capability reporting for relay nodes in wireless networks | |
| US11160048B2 (en) | Systems and methods for automatic routing, mapping, and clustering of remote units in a distributed communication system | |
| CN103379648B (en) | Relaying coordinated scheduling method and device | |
| JP2022517304A (en) | How to provide a mobile wireless connection in a confined space using an external TV antenna and related systems | |
| KR101730614B1 (en) | Method for Providing In-Building Service By Using Wideband Coupler, In-Building System And Wideband Coupler Therefor | |
| EP3039847B1 (en) | Arrangement, system and methods therein for monitoring a transmission line |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 201206 Pudong New Area Jinqiao Export Processing Zone, Nanjing Road, No. 388, Shanghai Applicant after: Shanghai NOKIA Baer Limited by Share Ltd Address before: 201206 Pudong New Area Jinqiao Export Processing Zone, Nanjing Road, No. 388, Shanghai Applicant before: Shanghai Alcatel-Lucent Co., Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |