CN102447526A - Method and device for rate self-adaption between RRU and BBU - Google Patents

Abstract

The embodiment of the invention provides a method for rate self-adaption between RRU and BBU, which comprises the following steps: the RRU is connected with a base station through a Slave interface, and the Master interface and the Slave interface complete access at the lowest level rate; a BBU in the base station inquires rate grade information to the RRU and receives a rate grade fed back by the RRU; and the BBU determines a corresponding rate according to the attribute of the Master side equipment and informs the RRU, and the Master interface and the Slave interface communicate at the corresponding rate. According to the scheme provided by the invention, the rate grades respectively supported by the Master and the Slave interfaces are inquired through the starting of the base station, and the base station assigns the target switching rates of the Master and the Slave interfaces according to the actual situation by combining with the distribution, so that the self-adaptive matching of the rates of the Master and the Slave interfaces is effectively realized, the bandwidth between the Master and the Slave interfaces is fully utilized, and the waste of bandwidth resources is avoided.

Description

The method and apparatus of rate adaptation between RRU and the BBU

Technical field

The present invention relates to moving communicating field, particularly, the present invention relates to the method and apparatus of rate adaptation between RRU and the BBU.

Background technology

The base station is a kind of form of radio station, is meant in certain area of radio coverage, and through mobile switching center, and the radio station is believed in the transceiving that the information of carrying out between the mobile telephone terminal is transmitted.The construction of mobile communication base station is the pith of mobile communication carrier investment, and the construction of mobile communication base station generally all is to carry out around coverage rate, speech quality, returns of investment, construction difficulty or ease, key element such as easy to maintenance.Along with the development of base station construction, from reducing aspects such as networking and maintenance cost, saving site resource, distributed base station becomes topmost selection.

Distributed base station adopts the radio-frequency module remote technology, and RRU (Radio Remote Unit, Remote Radio Unit) is installed in antenna end, is connected to macro base station or BBU (BaseBand Unit, Base Band Unit) independently through optical fiber.RRU is a kind of indoor and outdoor integration apparatus, have capacity big, be prone to install, characteristics that environmental suitability is strong.BBU is a kind of Base Band Unit equipment of easy installation, has the little characteristics of volume, does not need special machine room, can be installed in narrow spaces such as passageway, staircase, basement.

Because distributed base station strengthens the increasing demand of transmission bandwidth; 4.9152Gbps even the optical fiber communication speed of higher rate is applied in distributed base station (referring to " TD-SCDMA distributed base station Ir interfacing requirement-BP1.2-090211 " agreements such as " CPRI Specification V4.1 "), RRU or BBU equipment that this demand makes each manufacturer develop the higher optical fiber speed of support satisfy new needs.How to guarantee that new equipment puts into existing network, become the key issue that new equipment is applied to existing network with the existing equipment compatibility.

Scheme is to travel through various access rate configurations by RRU and BBU itself and the other side are communicated at present, and is normal up to communication.Specifically describe as follows:

The Slave port is attempted communicating with the highest wire rate and Master port; If do not reach synchronously, promptly consistent with the other side's speed, then the cycle with T1 switches to the lower grade of speed; Reattempt with the Master port and communicate, till accomplishing synchronously.The cycle of T1 is 3.9～4.1S.

The Master port is attempted communicating with ceiling for accumulation speed and Slave port, if do not reach synchronously, then the cycle with T2 switches to the grade that speed replaces, and reattempts with the Slave port to communicate, up to accomplishing synchronously.The cycle of T2 is 0.9～1.1S.

It is consistent that existing scheme can guarantee that Slave and Master reach speed, accomplishes synchronous regime, but can't guarantee that both communicate with available ceiling for accumulation road rate.Be exemplified below:

BBU (Master Interface) and RRU (Slave interface) all can support 2.4576Gbps and two kinds of wire rates of 4.9152Gbps, carry out rate-matched between them.BBU and RRU are the cycle between 4.9152Gbps and 2.4576Gbps speed, to switch BBU as shown in Figure 1 and RRU rate-matched figure back and forth with 1S and 4S respectively.

Under situation (1), when RRU began to be connected with BBU, RRU was in the process of adaptive switched speed, locates in (1), and BBU is consistent with RRU speed, link synchronization, and rate-matched is accomplished, and two ends all work in the 4.9153Gbps wire rate.Under situation (2), when RRU began to be connected with BBU, RRU was in the adaptive switched process, locates in (2), and BBU is consistent with RRU speed, link synchronization, and rate-matched is accomplished, and two ends all work in the 2.4576Gbps wire rate.

Same equipment, same speed switching flow, but since RRU to be connected into the time point of BBU inconsistent, cause the final matching speed of BBU and RRU different.Flow process can not guarantee the uniqueness of speed switching target, and the equipment that can not guarantee can make full use of transmission bandwidth.

Therefore, be necessary to propose a kind of otherwise effective technique scheme, effectively realize the Adaptive matching of speed between RRU and the BBU.

Summary of the invention

The object of the invention is intended to solve at least one of above-mentioned technological deficiency; The speed grade of particularly supporting respectively through base station initiated inquiry Master and Slave interface; Combine cloth to join the target switching rate of specifying Master and Slave interface by the base station according to actual conditions, effectively realize the Adaptive matching of Master and Slave interface rate.

In order to achieve the above object, embodiments of the invention have proposed the method for rate adaptation between a kind of RRU and the BBU on the one hand, may further comprise the steps:

RRU connects the base station through the Slave interface, and Master Interface and Slave interface are accomplished with the lowest class speed and inserted;

BBU in the said base station is to said RRU query rate class information, and receives the speed grade of said RRU feedback;

Said BBU confirms corresponding speed and notifies said RRU that said Master Interface and Slave interface communicate with corresponding speed according to the attribute of Master side apparatus.

The embodiment of the invention has also proposed a kind of base station on the other hand, comprises BBU module, receiver module and sending module,

Said BBU module is used for to said RRU query rate class information, and confirms corresponding speed according to the attribute of Master side apparatus;

Said receiver module is used to receive RRU and connects the information that send said base station through the Slave interface, and the speed grade that receives said RRU feedback, and wherein, Master Interface and Slave interface are accomplished with the lowest class speed and inserted;

Said sending module is used for corresponding speed is sent to said RRU, and said Master Interface and Slave interface communicate with corresponding speed.

The such scheme that the present invention proposes; The speed grade of supporting respectively through base station initiated inquiry Master and Slave interface; Combine cloth to join the target switching rate of specifying Master and Slave interface by the base station according to actual conditions, effectively realize the Adaptive matching of Master and Slave interface rate, simultaneously; Can make full use of the bandwidth between Master and the Slave interface, avoid the bandwidth resources waste.The such scheme that the present invention proposes, very little to the change of existing system, can not influence the compatibility of system, and realize simple, efficient.

Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize through practice of the present invention.

Description of drawings

Above-mentioned and/or additional aspect of the present invention and advantage are from obviously with easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:

Fig. 1 is BBU and the different access of the RRU rate-matched sketch map on opportunity;

Fig. 2 is the method flow diagram of rate adaptation between embodiment of the invention RRU and the BBU;

Fig. 3 is the structural representation according to embodiment of the invention base station;

Fig. 4 matees sketch map again for the back speed of shaking hands according to embodiment of the invention inferior grade speed.

Embodiment

Describe embodiments of the invention below in detail, the example of said embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment that is described with reference to the drawings below, only be used to explain the present invention, and can not be interpreted as limitation of the present invention.

The BBU side has Master Interface, is used to insert RRU equipment.RRU equipment has upper united mouth Slave interface and second line of a couplet mouth Master Interface.Usually, RRU equipment directly is connected with the Master Interface of BBU through the Slave interface, or the Master Interface connection cascade access base station through another RRU equipment of being connected with the base station.

Master Interface and Slave interface communicate according to the minimum speed grade of agreement agreement, and each equipment and hardware can be backward compatible usually, and under this condition, Master and Slave can both realize accomplishing synchronously inserting.RRU is through Slave interface access base station.After access process was accomplished, the speed grade by base station initiated inquiry Master and Slave interface are supported respectively combined cloth to join the target switching rate of specifying Master and Slave interface by the base station according to actual conditions again.After Master Interface and Slave interface are received message, switch to targeted rate separately, the rate-matched flow process finishes.

In order to realize the present invention's purpose, the embodiment of the invention has proposed the method for rate adaptation between a kind of RRU and the BBU, may further comprise the steps: RRU connects the base station through the Slave interface, and Master Interface and Slave interface are accomplished with the lowest class speed and inserted; BBU in the said base station is to said RRU query rate class information, and receives the speed grade of said RRU feedback; Said BBU confirms corresponding speed and notifies said RRU that said Master Interface and Slave interface communicate with corresponding speed according to the attribute of Master side apparatus.

As shown in Figure 2, the method flow diagram for rate adaptation between embodiment of the invention RRU and the BBU may further comprise the steps:

S110:Master interface and Slave interface are accomplished with the lowest class speed and are inserted.

In step S110, RRU connects the base station through the Slave interface, and Master Interface and Slave interface are accomplished with the lowest class speed and inserted.

Particularly, RRU comprises through Slave interface connection base station:

The Slave interface of RRU directly connects the Master Interface of base station, or the Slave interface of RRU is through being connected and access base station with the Master Interface of another RRU of base station communication.

Therefore, correspondingly, when RRU directly connects the base station, the Master side apparatus is the BBU in the base station;

When RRU through with another RRU access base station of base station communication, the Master side apparatus is another RRU with base station communication.

S120: the base station is to RRU query rate class information, and the speed grade of reception RRU feedback.

In step S120, the BBU in the base station is to RRU query rate class information, and the speed grade of reception RRU feedback.

After RRU receives the query messages of BBU, check self speed, for example comprise the speed grade that the speed grade that software version supports, the hardware optical module of connection etc. support after, reply message and give BBU.The speed that notice BBU self supports.For example, because used lower grade of optical module, in the time of can only supporting 2.4576Gbps speed, the speed grade that will only report self is 2.4576Gbps as the Slave of RRU.

S130:Master interface and Slave interface communicate with corresponding speed.

In step S130, BBU confirms corresponding speed and notifies RRU that final Master Interface and Slave interface communicate with corresponding speed according to the attribute of Master side apparatus.

After BBU received the answer message of RRU, inspection BBU side self speed comprised the speed grade that the speed grade of software version support, the hardware optical module of link etc. are supported, combines the admissible rate grade of RRU at last, selects to satisfy the speed grade of both sides.If this speed grade is higher than the speed that cloth is joined appointment, then use cloth to join speed; If this speed grade is lower than the speed grade that cloth is joined appointment, then need report the base station, point out that actual hardware connects to join with cloth not to be inconsistent.The speed grade information that BBU will finally need use is issued RRU with the form of message.

Therefore, BBU confirms that according to the attribute of Master side apparatus corresponding speed comprises:

The speed grade that BBU selects to meet Master side apparatus and RRU traffic rate simultaneously is as corresponding speed.

In addition, when corresponding speed is greater than or equal to cloth when joining the speed of appointment, the speed that the speed of joining appointment with cloth communicates as Master Interface and Slave interface;

When corresponding speed was lower than cloth and joins the speed of appointment, BBU reported actual hardware to connect to join with cloth to the base station and is not inconsistent.

As shown in Figure 3, the embodiment of the invention also discloses a kind of base station 100, compriseBBU module 110,receiver module 120 andsending module 130.

Wherein,BBU module 110 is used for to RRU query rate class information, and confirms corresponding speed according to the attribute of Master side apparatus.

Particularly,BBU module 110 confirms that according to the attribute of Master side apparatus corresponding speed comprises:

The speed grade thatBBU module 110 is selected to meet Master side apparatus and RRU traffic rate simultaneously is as corresponding speed.

Receiver module 120 is used to receive RRU and connects the information that send the base station through the Slave interface, and the speed grade that receives the RRU feedback, and wherein, Master Interface and Slave interface are accomplished with the lowest class speed and inserted.

Particularly, RRU comprises through Slave interface connection base station:

RRU directly connects the base station, or RRU through with another RRU access base station of base station communication.

Correspondingly, when RRU directly connects the base station, the Master side apparatus is theBBU module 110 in the base station;

When RRU through with another RRU access base station of base station communication, the Master side apparatus is another RRU with base station communication.

Sending module 130 is used for corresponding speed is sent to RRU, and Master Interface and Slave interface communicate with corresponding speed.

Usually, when corresponding speed is greater than or equal to cloth when joining the speed of appointment, the speed that the speed of joining appointment with cloth communicates as Master Interface and Slave interface;

When corresponding speed was lower than cloth and joins the speed of appointment,BBU module 110 reported actual hardware to connect to join with cloth to the base station and is not inconsistent.

For the ease of understanding the present invention, combine concrete instance to do further to set forth to said method disclosed by the invention or equipment.

For example: in the Ir of TD system agreement (referring to " TD-SCDMA distributed base station Ir interfacing requirement-BP1.2-090211 "), the minimum speed grade of the Master of regulation and Slave interface is 2.4576Gbps.The highest support of the Master Interface 4.9152Gbps of BBU side, the highest support of the Slave interface 4.9152Gbps of RRU side.The speed that common this link of plan uses is 4.9152Gbps.

As shown in Figure 4, use above-mentioned disclosed method of the present invention or equipment, will be to launch with the next stage:

Stage 1:Master and Slave acquiescence are used 2.4576Gbps, the i.e. speed of the lowest class in the agreement.Because this moment, two ends speed was consistent, thus the normal transceive data of both sides, the completion access process.

Stage 2: after accomplishing access process, can communicate by letter with this RRU in the base station, thereby manage.BBU sends the message of query rate grade to RRU.

After stage 3:RRU receives query messages, check self speed, comprise the speed grade that the speed grade that software version supports, the hardware optical module of connection etc. support after, reply message and give BBU.The speed that notice BBU self supports.For example, because used lower grade of optical module, in the time of can only supporting 2.4576Gbps speed, the speed grade that will only report self is 2.4576Gbps as the Slave of RRU.In example, RRU replys BBU can support 2.4576Gbps and two kinds of speed of 4.9152Gbps.

After stage 4:BBU received the answer message of RRU, inspection BBU side self speed comprised the speed grade that software version is supported, the speed grade that the hardware optical module of link etc. are supported combines the admissible rate grade of RRU at last, selects to satisfy the speed grade of both sides.If this speed grade is higher than the speed that cloth is joined appointment, then use cloth to join speed; If this speed grade is lower than the speed grade that cloth is joined appointment, then need report the base station, point out that actual hardware connects to join with cloth not to be inconsistent.The speed grade information that BBU will finally need use is issued RRU with the form of message.In example; Because BBU and RRU all support 2.4576Gbps and two kinds of speed of 4.9152Gbps; The max rate levels 4.9152Gbps that BBU selects both to support, and cloth is joined and also is 4.9152Gbps, joins with cloth to conform to; So BBU selects the target switching rate of 4.9152Gbps as two ends, and inform RRU with the form of message.

The speed grade information that stage 5:RRU and BBU use according to the final needs in the message is switched the speed of Slave and Master.In example, two ends all switch to 4.9152Gbps.

The such scheme that the present invention proposes; The speed grade of supporting respectively through base station initiated inquiry Master and Slave interface; Combine cloth to join the target switching rate of specifying Master and Slave interface by the base station according to actual conditions, effectively realize the Adaptive matching of Master and Slave interface rate, simultaneously; Can make full use of the bandwidth between Master and the Slave interface, avoid the bandwidth resources waste.The such scheme that the present invention proposes, very little to the change of existing system, can not influence the compatibility of system, and realize simple, efficient.

One of ordinary skill in the art will appreciate that and realize that all or part of step that the foregoing description method is carried is to instruct relevant hardware to accomplish through program; Described program can be stored in a kind of computer-readable recording medium; This program comprises one of step or its combination of method embodiment when carrying out.

In addition, each functional unit in each embodiment of the present invention can be integrated in the processing module, also can be that the independent physics in each unit exists, and also can be integrated in the module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, also can adopt the form of software function module to realize.If said integrated module realizes with the form of software function module and during as independently production marketing or use, also can be stored in the computer read/write memory medium.

The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.

The above only is an execution mode of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.

Claims (10)

1. the method for rate adaptation between RRU and the BBU is characterized in that, may further comprise the steps:

RRU connects the base station through the Slave interface, and Master Interface and Slave interface are accomplished with the lowest class speed and inserted;

BBU in the said base station is to said RRU query rate class information, and receives the speed grade of said RRU feedback;

Said BBU confirms corresponding speed and notifies said RRU that said Master Interface and Slave interface communicate with corresponding speed according to the attribute of Master side apparatus.

2. the method for claim 1 is characterized in that, RRU connects the base station through the Slave interface and comprises:

Said RRU directly connects said base station, or said RRU inserts said base station through another RRU with said base station communication.

3. method as claimed in claim 2 is characterized in that,

When said RRU directly connects said base station, said Master side apparatus is the BBU in the said base station;

When said RRU inserts said base station through another RRU with said base station communication, said Master side apparatus is another RRU with said base station communication.

4. the method for claim 1 is characterized in that, said BBU confirms that according to the attribute of Master side apparatus corresponding speed comprises:

The speed grade that said BBU selects to meet Master side apparatus and said RRU traffic rate simultaneously is as corresponding speed.

5. method as claimed in claim 4 is characterized in that,

When corresponding speed is greater than or equal to cloth when joining the speed of appointment, the speed that the speed of joining appointment with cloth communicates as said Master Interface and Slave interface;

When corresponding speed was lower than cloth and joins the speed of appointment, said BBU reported actual hardware to connect to join with cloth to said base station and is not inconsistent.

6. a base station is characterized in that, comprises BBU module, receiver module and sending module,

Said BBU module is used for to said RRU query rate class information, and confirms corresponding speed according to the attribute of Master side apparatus;

Said receiver module is used to receive RRU and connects the information that send said base station through the Slave interface, and the speed grade that receives said RRU feedback, and wherein, Master Interface and Slave interface are accomplished with the lowest class speed and inserted;

Said sending module is used for corresponding speed is sent to said RRU, and said Master Interface and Slave interface communicate with corresponding speed.

7. base station as claimed in claim 6 is characterized in that, RRU connects said base station through the Slave interface and comprises:

Said RRU directly connects said base station, or said RRU inserts said base station through another RRU with said base station communication.

8. base station as claimed in claim 7 is characterized in that,

When said RRU directly connects said base station, said Master side apparatus is the said BBU module in the said base station;

When said RRU inserts said base station through another RRU with said base station communication, said Master side apparatus is another RRU with said base station communication.

9. base station as claimed in claim 6 is characterized in that, said BBU confirms that according to the attribute of Master side apparatus corresponding speed comprises:

The speed grade that said BBU module is selected to meet Master side apparatus and said RRU traffic rate simultaneously is as corresponding speed.

10. base station as claimed in claim 9 is characterized in that,

When corresponding speed is greater than or equal to cloth when joining the speed of appointment, the speed that the speed of joining appointment with cloth communicates as said Master Interface and Slave interface;

When corresponding speed was lower than cloth and joins the speed of appointment, said BBU module reported actual hardware to connect to join with cloth to said base station and is not inconsistent.

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