CN202160286U

CN202160286U - Distributed base station

Info

Publication number: CN202160286U
Application number: CN 201120138303
Authority: CN
Inventors: 陈志明; 邓世群
Original assignee: Comba Telecom Systems China Ltd
Current assignee: Comba Network Systems Co Ltd
Priority date: 2011-05-04
Filing date: 2011-05-04
Publication date: 2012-03-07
Anticipated expiration: 2021-05-04

Abstract

The utility model provides a distributed base station, which solves the problem of high cost because the BBU and RRU or cascaded RRUs are connected by an optical fibre even if the distance between the BBU and RRU or between the cascaded RRUs is small in prior art. The distributed base station of the utility model comprises a BBU and an RRU. The BBU comprises an Ethernet interface. The RRU comprises a slave interface and a master interface. The slave interface and the master interface are Ethernet interfaces. The Ethernet interface of the BBU and the slave interface of the first level of RRU are connected by an Ethernet cable. The master interface of each level of RRU and the salve interface of the next level of RRU are connected by the Ethernet cable. The distributed base station of the utility model organizes network conveniently and flexibly, improves utilization rate of existing Ethernet, and is convenient for project implementation. Most important, the networking cost is reduced.

Description

Distributed base station

Technical field

The utility model relates to moving communicating field, relates in particular to a kind of distributed base station.

Background technology

At present, the main commercial technology of mobile communication just from 2G to the 3G transition, most operation commercial city is faced with and how on original 2G network, builds 3G network, how increases new website to optimize the problem that covers for legacy network.Therefore; How select sites and find suitable installing space for these base station equipments that increase newly; Become the major issue that operator need face; And as far as there not being the startup carrier of site resource fully, owing to will carry out brand-new site planning and selection, it is more outstanding that this problem then seems.

The new distributed base station produces for addressing this problem.The new distributed base station is divided into two functional modules to traditional macro base station equipment according to function; Wherein be integrated in functions such as the base band of base station, master control, transmission, clock on the module that calls Base Band Unit BBU (Base Band Unit), the Base Band Unit volume is little, the installation site is very flexible; Be integrated in another one to radio frequency in transceiver, the power amplifier etc. in addition and call on the module of radio frequency unit RRU (Remote Radio Unit), radio frequency unit is installed in antenna end.Be connected through optical fiber between Base Band Unit and the radio frequency unit, form brand-new distributed base station solution.

Up to the present, all distributed base station BBU adopt optical fiber to be connected with RRU, and optical fiber has long distance of signal transmission, and the advantage that signal transmission quality is good is long only selection apart from the wire signal transmission.But Optical Fiber Transmission also has its shortcoming; Expensive like cost, need wiring specially, can not use existing transfer resource, connect a plurality of RRU and need many optical fiber links; Just adopt annular connection or cascade to connect at last and also need two optical fiber links at least; Cause cost double, and can cause host-host protocol complicated; Especially when between BBU and the RRU or between the RRU of cascade during close together, use optical fiber to connect the cost problem of being brought and seem more outstanding.

The utility model content

For addressing the above problem, the utility model provides a kind of distributed base station, can not need use optical fiber to be connected during close together between BBU and RRU or between the RRU of cascade.

A kind of distributed base station of the utility model comprises that BBU of base station, base station zoom out end RRU, and said BBU of base station comprises Ethernet interface, and said base station is zoomed out end RRU and comprised from interface and main interface, saidly is Ethernet interface from interface, main interface; The Ethernet interface of said BBU of base station zooms out being connected from use Ethernet netting twine between the interface of end RRU with first order base station, and the main interface that end RRU is zoomed out in base stations at different levels zooms out being connected from use Ethernet netting twine between the interface of end RRU with the next stage base station.

Can find out from above scheme; A kind of distributed base station of the utility model; With between BBU and the RRU and the networking mode that traditional optical fiber is connected between the cascaded RRUs be transformed to common Ethernet and connect; Improve the utilance of existing Ethernet, made things convenient for engineering construction, the most important thing is to reduce the cost of networking.

Description of drawings

Fig. 1 is the networking schematic diagram of a kind of distributed base station of the utility model;

Fig. 2 is the communication link protection schematic diagram of the utility model;

Fig. 3 is the annular networking schematic diagram of the utility model.

Embodiment

The utility model provides a kind of distributed base station, is in order to solve in the prior art problem in the cost costliness of using optical fiber to be connected between BBU and the RRU or between the RRU of cascade to be brought.Along with the fast development of new distribution type base station in recent years; Between BBU and the RRU or the distance between the RRU of cascade more and more nearer; Sometimes or even in building just there are BBU and RRU (or in building, having several RRU simultaneously) simultaneously; Only several meters of covering points distances between at this time every floor if also adopt traditional optical fiber to connect in the so short distance, are not calculated on the cost very much; At this moment other more cheap and common connected mode can be adopted fully, and the optical fiber of high price needn't be used.Meanwhile, the ethernet technology development is rapid, and when distance was no more than 100 meters between the equipment that two needs connect, application Ethernet netting twine transmits data became a very good selection.And the Ethernet netting twine is very common at present, in the most building covering system laying is arranged all.Therefore, between BBR and the RRU or between the RRU of two cascades, when their distance is no more than 100 meters, the network-building method that can use the application Ethernet netting twine of the utility model to connect.Be described in detail below in conjunction with the execution mode of accompanying drawing the utility model.

Embodiment one

As shown in Figure 1, a kind of distributed base station of the utility model has comprised three kinds of equipment: end (RRU), Ethernet netting twine are zoomed out in base station (BBU), base station.Wherein BBU can have one or more Ethernet interfaces that are connected with RRU.RRU comprises from interface and main interface, saidly is Ethernet interface from interface, main interface.Be used for being connected with BBU or being connected with upper level RRU from interface, main interface is used for being connected with next stage RRU.The Ethernet interface of BBU is connected from use Ethernet netting twine between the interface with first order RRU's, and the main interface of RRU at different levels is connected from use Ethernet netting twine between the interface with next stage RRU's; Said BBU sends or receives through the Ethernet interface that belongs to self and the communication information of all RRU; Owing to use the characteristic of Ethernet transmission; All comprise ethernet address (MAC Address) in the communication information, promptly which RRU is this communication information specifically will send to these all are included in the communication information, and RRU judges according to the ethernet address in the said communication information (MAC Address) whether this RRU is purpose RRU; If then information is handled in this locality; If not; Explain that then this communication information is not to send to this RRU's; This moment, this RRU was handed down to next stage RRU through main interface with the said communication information; Next stage RRU judges whether that according to the ethernet address in the said communication information this communication information issues self again, then this information is handled or is transmitted in this locality.

Above-mentioned Ethernet netting twine has the specification of multiple different rates, can select for use as the case may be, as long as guarantee to transmit ethernet signal.

Can find out from above scheme; A kind of distributed base station of the utility model; With between BBU and the RRU and the networking mode that traditional optical fiber is connected between the cascaded RRUs be transformed to common Ethernet and connect, help the acquisition of networking resource, improved the utilance of existing Ethernet; Make things convenient for engineering construction, the most important thing is to reduce the cost of networking.Therefore, when between BBU and the RRU or the distance between the cascaded RRUs when being no more than 100 meters, the networking mode of using the utility model will obviously be superior to using the connected mode of optical fiber, has application promise in clinical practice.

Embodiment two

Fig. 2 is the communication link protection schematic diagram of the utility model, and therefrom the networking of visible the utility model is very flexible.As shown in Figure 2, RRU comprises a plurality of main interfaces, and each main interface can be connected with an other RRU as required, so just can form communication link protection.

Add that with two-stage RRU a BBU is an example, describe the communication link protection principle of the utility model below in detail:

A, BBU use Ethernet netting twine and first order RRU to communicate through it self Ethernet interface, BBU through self this Ethernet interface transmission and receive the communication information of all RRU on this chain;

B, first order RRU be through receiving the communication information of BBU and all RRU from interface, the information (can judge whether belong to self information or do not belong to self information according to the ethernet address in the communication information) that comprises the information that belongs to first order RRU self in said all communication informations and do not belong to first order RRU self; First order RRU is also through sending the communication information of self information and other RRU that converge to BBU from interface in addition;

It is (as shown in Figure 2 that the information that C, first order RRU will not belong to self sends to next stage RRU through main interface; For simplicity; Can distinguish called after second level RRU; One have two second level RRU here), and receive the information that two second level RRU send (giving BBU) respectively through two main interfaces;

D, second level RRU be through receiving the information that first order RRU sends over from interface, and judge according to the ethernet address in the information whether said information is the information that belongs to self, if then information is handled in this locality; If not, then information is transmitted to third level RRU again through main interface;

E, second level RRU receive the information that third level RRU sends (giving BBU) through main interface, and through converging the information that sends to BBU to first order RRU from interface.

In fact the third level, the fourth stage on the whole link ... even the working method of all RRU is all similar with the first order, second level RRU; Just down send with data quantity transmitted up and constantly reduce, only need from the information between interface reception and transmission and the BBU until last RRU.

Embodiment three

Fig. 3 is the annular networking schematic diagram of the utility model, the therefrom same visible networking flexibility property of using the utility model.As shown in Figure 3, the main distinction of present embodiment and embodiment one is that the main interface of afterbody RRU is connected with the Ethernet interface of BBU to form annular networking.

In the annular networking of present embodiment; BBU also is used to detect RRU at different levels whether fault has taken place; When the RRU that detects outside the said afterbody RRU breaks down, then notify the RRU RRU afterwards that fault has taken place that main interface is changed into from interface, will change main interface into from interface.This be because; Though the main interface of afterbody RRU is connected with the Ethernet interface of BBU; But the main interface of the afterbody RRU that is connected with BBU is not send data and information at ordinary times, has only that this main interface just can start when wherein any one RRU except that said afterbody RRU on the full annular link or certain bar Ethernet netting twine break down; This moment, BBU sent the information (through the main interface of afterbody RRU) that fault has taken place other equipment to afterbody RRU; After afterbody RRU received fault message, its main interface was transformed into from interface, undertook the responsibility of the information of sending to BBU; Accordingly, the main interface that RRU other RRU afterwards of fault have taken place on the full annular link also can be transformed into from interface, become main interface from interface, and this moment, annular link can logically become two chain links.

Above-described the utility model execution mode does not constitute the qualification to the utility model protection range.The modification of being done within any spirit and principle at the utility model, be equal to replacement and improvement etc., all should be included within the claim protection range of the utility model.

Claims

1. distributed base station comprises that BBU of base station, more than one base station zoom out end RRU, it is characterized in that:

Said BBU of base station comprises Ethernet interface, and each base station is zoomed out end RRU and comprised from interface and main interface, saidly is Ethernet interface from interface, main interface; The Ethernet interface of said BBU of base station zooms out being connected from use Ethernet netting twine between the interface of end RRU with first order base station, and the main interface that end RRU is zoomed out in base stations at different levels zooms out being connected from use Ethernet netting twine between the interface of end RRU with the next stage base station.

2. distributed base station according to claim 1 is characterized in that, said base station is zoomed out end RRU and comprised a plurality of main interfaces, forms communication link protection.

3. distributed base station according to claim 1 is characterized in that, the main interface that end RRU is zoomed out in the afterbody base station is connected with the Ethernet interface of said BBU of base station to form annular networking.