CN104581740B

CN104581740B - A kind of method and apparatus of the frequency spectrum switching based on cognitive radio

Info

Publication number: CN104581740B
Application number: CN201310493785.6A
Authority: CN
Inventors: 谭飞翔
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-10-18
Filing date: 2013-10-18
Publication date: 2019-04-19
Anticipated expiration: 2033-10-18
Also published as: CN104581740A

Abstract

The embodiment of the present invention provides a kind of method and apparatus of frequency spectrum switching based on cognitive radio, it is related to the communications field, to realize being switched fast for base station during frequency spectrum switches, to avoid the interruption of customer service, this method comprises: base station is after determining progress frequency spectrum switching, obtain frequency spectrum handover information, the frequency spectrum handover information is sent to the radio frequency remote unit RRU of the base station by BBU by CPRI interface, the frequency spectrum handover information is sent to terminal by the RRU, the corresponding frequency spectrum of mark that the target spectrum is switched to by current frequency spectrums of operation according to the frequency spectrum switching time so as to the terminal.This method embodiment switches for frequency spectrum.

Description

A kind of method and apparatus of the frequency spectrum switching based on cognitive radio

Technical field

The present invention relates to the communications field more particularly to a kind of methods and apparatus of the frequency spectrum switching based on cognitive radio.

Background technique

CR(Cognitive Radio, cognitive radio) technology is to solve nervous most promising of current frequency spectrum resource Technology.Current frequency spectrum Distursement is fixed allocation, i.e., government is that the specific transactions of specific user distribute fixed resource, such as All using fixed frequency spectrum, some of frequency spectrums are not to use always for TV, broadcast, radar, navigation etc., thus there is certain A little periods and certain geographical locations, partial frequency spectrum are not used adequately, and at present in the frequency spectrum of fixed allocation, have A large amount of frequency spectrums are underutilized, and which results in the significant wastages of frequency spectrum resource.Cognitive radio passes through cognitive radio frequency spectrum ring Border, it can be found that these vacant frequency spectrums for occurring whenever and wherever possible, and do not interfering PU(Primary User, primary user) before These frequency spectrums of dynamic access are put, to improve the availability of frequency spectrum, wherein the PU is the frequency usage user of former fixed allocation.

In the existing frequency spectrum switching based on cognitive radio scene, base station passes through after determining progress frequency spectrum switching BBU(Base band Unit, baseband processing unit) the frequency spectrum handover information that will acquire is sent to terminal, and will be obtained in BBU During the frequency spectrum handover information got is sent to terminal, BBU needs to switch the frequency spectrum by high-level signaling (application layer) Information is sent to bottom (physical layer) by high-rise (application layer), and eats dishes without rice or wine to send out the frequency spectrum handover information eventually by physical layer It send to terminal, the time of the high-level signaling can be received to physical layer due to issuing the high-level signaling from high-rise (application layer) It is uncertain, therefore, it will cause the delay of frequency spectrum handover information transmission, thus the delay for causing frequency spectrum to switch, in this way, making base Frequency spectrum switching can not be carried out in time by standing, to cause the interruption of customer service, reduce user experience.

Summary of the invention

The present invention provides a kind of method and apparatus of frequency spectrum switching, to realize the quick of base station during frequency spectrum switches Switching, to avoid the interruption of customer service.

In a first aspect, providing a kind of method of frequency spectrum switching based on cognitive radio, comprising:

Base station obtains frequency spectrum handover information, wherein the frequency spectrum handover information includes mesh after determining progress frequency spectrum switching Mark mark and the frequency spectrum switching time of frequency spectrum；

The frequency spectrum handover information is sent to the remote radio of the base station by Base Band Unit BBU by CPRI interface Unit R RU；

The frequency spectrum handover information is sent to terminal by the RRU, so that the terminal switches according to the frequency spectrum Time is by the corresponding frequency spectrum of mark that current frequency spectrums of operation switches to the target spectrum.

In a first possible implementation of that first aspect, described switched the frequency spectrum by Base Band Unit BBU is believed It ceases through the radio frequency remote unit RRU that CPRI interface is sent to the base station and includes:

The frequency spectrum handover information is encapsulated as radio frames by the BBU, and by the CPRI interface by the nothing Line frame is sent to the RRU.

With reference to first aspect or the first possible implementation, in the second possible implementation, described to pass through The frequency spectrum handover information includes: by BBU by the RRU that CPRI interface is sent to the base station

The frequency spectrum handover information is sent to the RRU by the reservation control word in CPRI superframe by the BBU.

With reference to first aspect or the first possible implementation, in the third possible implementation, described to pass through The frequency spectrum handover information includes: by BBU by the RRU that CPRI interface is sent to the base station

The frequency spectrum handover information is sent to the RRU by ethernet link by the BBU.

With reference to first aspect or the first possible implementation, in the fourth possible implementation, described to pass through The frequency spectrum handover information includes: by BBU by the RRU that CPRI interface is sent to the base station

The frequency spectrum handover information is sent to by the channel High-Level Data Link Control HDLC by the BBU described RRU。

With reference to first aspect or the first possible implementation, in a fifth possible implementation, described to pass through The frequency spectrum handover information includes: by BBU by the RRU that CPRI interface is sent to the base station

The frequency spectrum handover information is sent to the RRU by digital baseband I/Q data channel by the BBU.

Second aspect provides a kind of method of frequency spectrum switching based on cognitive radio, comprising:

Terminal receives the frequency spectrum handover information that base station is sent by RRU, wherein the frequency spectrum handover information includes target frequency The mark of spectrum and frequency spectrum switching time；

The frequency spectrum handover information is sent to BBU by CPRI interface by RRU, so that the BBU is according to the frequency Spectrum handover information obtain the target spectrum mark and the frequency spectrum switching time；

The mark of the target spectrum and the frequency spectrum switching time are sent by the CPRI interface by the BBU To RRU, so that the terminal is switched to the target by current frequency spectrums of operation according to the frequency spectrum switching time by the RRU The corresponding frequency spectrum of the mark of frequency spectrum.

In second aspect in the first possible implementation, it is described by the BBU by the mark of the target spectrum Being sent to RRU by the CPRI interface with the frequency spectrum switching time includes:

The mark of the target spectrum and the frequency spectrum switching time are passed through into the reservation in CPRI superframe by the BBU Control word is sent to the RRU.

In second of second aspect possible implementation, it is described by the BBU by the mark of the target spectrum Being sent to RRU by the CPRI interface with the frequency spectrum switching time includes:

The mark of the target spectrum and the frequency spectrum switching time are sent to by ethernet link by the BBU The RRU.

In second aspect in the third possible implementation, the BBU of the terminal will be described by the CPRI interface The RRU that the mark of frequency spectrum switching time and the target spectrum is sent to the terminal includes:

The mark of the target spectrum and the frequency spectrum switching time are passed through into High-Level Data Link Control by the BBU The channel HDLC is sent to the RRU.

In the 4th kind of possible implementation of second aspect, the BBU of the terminal will be described by the CPRI interface The RRU that the mark of frequency spectrum switching time and the target spectrum is sent to the terminal includes:

The mark of the target spectrum and the frequency spectrum switching time are led to by digital baseband I/Q data by the BBU Road is sent to the RRU.

The third aspect provides a kind of base station, comprising: Base Band Unit BBU and radio frequency remote unit RRU；

The BBU, for obtaining frequency spectrum handover information, and the frequency spectrum is switched and is believed after determining progress frequency spectrum switching Breath is sent to the RRU by CPRI interface, wherein the frequency spectrum handover information includes the mark and frequency spectrum switching of target spectrum Time；

The RRU, the frequency spectrum handover information for obtaining the BBU are sent to terminal, so that the terminal is according to institute State the corresponding frequency spectrum of mark that frequency spectrum switching time switches to the target spectrum by current frequency spectrums of operation；

The RRU is also used to, and is switched to the base station by current spectral according to the frequency spectrum switching time that the BBU is sent The corresponding frequency spectrum of the mark of the target spectrum.

In the third aspect in the first possible implementation, the BBU is specifically used for, and the frequency spectrum handover information is sealed Dress is radio frames, and the radio frames are sent to the RRU by the CPRI interface.

In conjunction with the third aspect or the first possible implementation, in the second possible implementation, the BBU tool Body is used for, and the frequency spectrum handover information is sent to the RRU by the reservation control word in CPRI superframe.

In conjunction with the third aspect or the first possible implementation, in the third possible implementation, the BBU tool Body is used for, and the frequency spectrum handover information is sent to the RRU by ethernet link.

In conjunction with the third aspect or the first possible implementation, in the fourth possible implementation, the BBU tool Body is used for, and the frequency spectrum handover information is sent to the RRU by the channel High-Level Data Link Control HDLC.

In conjunction with the third aspect or the first possible implementation, in a fifth possible implementation, the BBU tool Body is used for, and the frequency spectrum handover information is sent to the RRU by digital baseband I/Q data channel.

Fourth aspect provides a kind of terminal, comprising: Base Band Unit BBU and radio frequency remote unit RRU；

The frequency spectrum handover information is passed through CPRI interface for receiving the frequency spectrum handover information of base station transmission by the RRU It is sent to BBU, wherein the frequency spectrum handover information includes mark and the frequency spectrum switching time of target spectrum；

The BBU, the frequency spectrum handover information for being sent according to the RRU obtain the mark of the target spectrum and described Frequency spectrum switching time, and the mark of the target spectrum and the frequency spectrum switching time are sent to by the CPRI interface RRU；

The RRU is also used to, and the terminal is switched to institute by current frequency spectrums of operation according to the frequency spectrum switching time State the corresponding frequency spectrum of mark of target spectrum.

In fourth aspect in the first possible implementation, the BBU is specifically used for, by the mark of the target spectrum The RRU is sent to by the reservation control word in CPRI superframe with the frequency spectrum switching time.

In second of fourth aspect possible implementation, the BBU is specifically used for, by the mark of the target spectrum The RRU is sent to by ethernet link with the frequency spectrum switching time.

In fourth aspect in the third possible implementation, the BBU is specifically used for, by the mark of the target spectrum The RRU is sent to by the channel High-Level Data Link Control HDLC with the frequency spectrum switching time.

In the 4th kind of possible implementation of fourth aspect, the RRU is specifically used for, by the mark of the target spectrum The RRU is sent to by digital baseband I/Q data channel with the frequency spectrum switching time.

By using above scheme, the frequency spectrum handover information that base station will acquire by BBU is sent to by CPRI interface The RRU of base station, and the frequency spectrum handover information is sent to by terminal by the RRU, to realize that base station is synchronous with the frequency spectrum of terminal Switching, in this way, due to the interface that the CPRI interface between BBU and RRU is physical layer, the BBU of base station directly passes through physics Frequency spectrum handover information is transmitted to RRU by layer, and the frequency spectrum handover information is sent to terminal eventually by RRU, is needed not move through High level to bottom (i.e. application layer to physical layer) transmission, so as to avoid the frequency spectrum as caused by transmission of the high level to bottom The delay of handover information transmission guarantees that base station and terminal can carry out the synchronism switching of frequency spectrum in time, avoids customer service It interrupts, improves user experience.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, embodiment will be described below Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these Figure obtains other attached drawings.

Fig. 1 is a kind of flow diagram of the frequency spectrum switching method based on cognitive radio provided in an embodiment of the present invention；

Fig. 2 is the process signal of another frequency spectrum switching method based on cognitive radio provided in an embodiment of the present invention Figure；

Fig. 3 is a kind of Signalling exchange signal of frequency spectrum switching method based on cognitive radio provided in an embodiment of the present invention Figure；

Fig. 4 is a kind of structural schematic diagram of base station provided in an embodiment of the present invention；

Fig. 5 is a kind of structural schematic diagram of terminal provided in an embodiment of the present invention.

Specific embodiment

For the purpose of the present invention, technical solution and advantage is more clearly understood, with reference to the accompanying drawings and examples, Technical solution provided by the invention is described in further detail.Obviously, described embodiment is only that present invention a part is real Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creation Property labour under the premise of every other embodiment obtained, shall fall within the protection scope of the present invention.

The embodiment of the present invention is applied to cognitive radio scene system, and within the system, base station carries out frequency spectrum detection, works as base When station detects that primary user appears in the frequency spectrum that present terminal uses, base station obtains frequency spectrum handover information according to testing result, and The frequency spectrum handover information is sent to the RRU (Radio Remote Unit, wireless extension unit) of the base station by BBU, is passed through The frequency spectrum handover information is sent to terminal by the RRU.

Terminal obtains the frequency spectrum handover information by RRU and BBU, and will be described by RRU according to the frequency spectrum handover information Terminal switches to target spectrum by current spectral, interferes to avoid to primary user.

The embodiment of the present invention provides a kind of method of frequency spectrum switching based on cognitive radio, as shown in Figure 1, this method Executing subject is base station, this method comprises:

S101, base station obtain frequency spectrum handover information after determining progress frequency spectrum switching.

Wherein, which includes mark and the frequency spectrum switching time of target spectrum, the time of frequency spectrum switching It is carried out for the base station time of frequency spectrum switching, which is the purpose frequency spectrum that the base station carries out frequency spectrum switching.

Specifically, base station detects that primary user occurs on current spectral, it is determined that carries out frequency spectrum switching, and determines frequency spectrum Switching time, and determine idle frequency spectrum as target spectrum from the list for the usable spectrum that itself is stored.

The frequency spectrum handover information is passed through CPRI(Common Public Radio by BBU by S102, base station Interface, general public wireless interface) interface is sent to the RRU of the base station.

Specifically, which is encapsulated as radio frames by the BBU by base station, and should by the CPRI interface Radio frames are sent to the RRU.

Wherein, in existing CPRI agreement, a kind of CPRI superframe is defined, which includes control word sum number According to, and be made of 256 basic frames (frame number can be denoted as 0 to 255), 150 superframes form a radio frames；Due to a base This frame includes 1 control word, and therefore, a CPRI superframe includes 256 control words (control font size can be denoted as 0 to 255), this 256 control words are divided into 64 subchannels again, and each subchannel includes 4 control words, as shown in the table:

Wherein, manufacturer's specified control word can be by manufacturer's self-defining function of distinct device.

Specifically, base station can wrap the frequency spectrum handover information by the RRU that CPRI interface is sent to the base station by BBU Include following four mode:

Mode one: the frequency spectrum handover information is sent to by base station by the BBU by the reservation control word in CPRI superframe The RRU.

Specifically, it is idle control word due to retaining control word, does not include any information, therefore the BBU of base station can be with The mark of frequency spectrum switching time and the target spectrum in the frequency spectrum handover information are arranged in the reservation control word, and passed through CPRI interface is sent to the RRU of base station.

Optionally, the mark of the frequency spectrum switching time and the target spectrum can be set carries out in same reservation control word Transmission, certainly, the mark of the frequency spectrum switching time and the target spectrum also can be set in different reservation control words, this hair It is bright that this is not construed as limiting.

For example, base station the frequency spectrum switching time is arranged in the control word that control font size is 15, and by the target spectrum Mark be arranged in control font size be 79 control word in, be merely illustrative here, this is not limited by the present invention.

In addition, the above-mentioned lattice comprising frequency spectrum switching time basic frame corresponding with the control field of the mark of the target spectrum Formula can be following format:

Frame head

Frequency spectrum switching time

The mark of target spectrum

The basic frame is encapsulated as radio frames by the BBU of base station, and the RRU of base station is sent to by CPRI interface, thus will The mark of the frequency spectrum switching time and target spectrum is sent to the RRU of the base station.

Mode two: the frequency spectrum handover information is sent to the RRU by ethernet link by BBU by base station.

Wherein, which is used for transmission high-speed data.

Specifically, the mark of frequency spectrum switching time and target spectrum in the frequency spectrum handover information are arranged the BBU of base station In the corresponding control word of the ethernet link (control word of the quick control maintenance channel in i.e. above-mentioned table), and by being somebody's turn to do CPRI interface is sent to the RRU of the base station.

The format of its corresponding basic frame can be following format:

Frame head

Frequency spectrum switching time

The mark of target spectrum

Mode three: the frequency spectrum handover information is passed through HDLC(High level Data Link by BBU by base station Control, High-Level Data Link Control) channel is sent to the RRU.

Wherein, which is used for transmission low speed data.

Specifically, the BBU of base station sets the mark of frequency spectrum switching time and the target spectrum in the frequency spectrum handover information It sets in the corresponding control word in the channel HDLC (control word for controlling maintenance channel at a slow speed in i.e. above-mentioned table), and passes through CPRI Interface is sent to base station RRU.

The format of its corresponding basic frame can be following format:

Frame head

Frequency spectrum switching time

The mark of target spectrum

Mode four: the frequency spectrum handover information is passed through IQ(In-phase Quadrature, digital base by BBU by base station Band) data channel is sent to the RRU.

Wherein, I/Q data channel is used for the transmission services data between the BBU and RRU of base station, which is that IQ is same Mutually orthogonal format.

Specifically, the BBU of base station is when sending I/Q data to the RRU of the base station, by the frequency spectrum in the frequency spectrum handover information The mark of switching time and the target spectrum is added in the I/Q data, thus by the frequency spectrum switching time and the target spectrum Mark is sent to the RRU of the base station.

In addition, the format of corresponding basic frame can be following format during transmitting I/Q data:

Frame head

Frequency spectrum switching time

The mark of target spectrum

The RRU of the base station is after receiving the frequency spectrum handover information, when being switched according to the frequency spectrum in the frequency spectrum handover information Between the base station is switched to the corresponding frequency spectrum of mark of the target spectrum by the mark of current goal frequency spectrum.

Optionally, since the position of base station immobilizes, the BBU of base station is transmitting basic frame to the RRU of base station Time delay is fixed in the process, in addition, the BBU of base station is getting frequency since the duration of basic frame is fixed (265 nanosecond) After composing switching time, which is converted to the quantity of corresponding basic frame according to the duration of basic frame, and will packet The effective marker position of basic frame of the section containing the switching time is set as significance bit (such as being set as 1), and by the number of the basic frame Amount is sent to the RRU of the base station, and the RRU of base station is receiving the basic frame and determining that the effective marker position of the basic frame is effective Behind position, is counted according to the quantity of the basic frame, reach the quantity of the basic frame in the quantity of subsequently received basic frame When, the RRU of base station carries out frequency spectrum switching.

For example, the BBU of base station is determined in 7 points of progress frequency spectrum switchings in 30 minutes, and determines and sent out to the RRU of base station within 20 minutes at 7 points Send frequency spectrum switching time, due to the duration of basic frame be it is fixed, the BBU of base station is by 7 points of 20 minutes to 7: 30/times Section (10 minutes) is converted into the quantity of corresponding basic frame, and the quantity of the basic frame is sent to the RRU of base station, then base station RRU is counted, subsequently received after the quantity for receiving the basic frame according to the quantity of frame basic in the radio frames When the quantity of basic frame reaches the quantity of the basic frame, the RRU of base station carries out frequency spectrum switching.

Optionally, if the RRU of the true directional base station of the BBU of base station sends time and the frequency spectrum switching of frequency spectrum switching time Between between period it is too long, then the quantity of corresponding basic frame can be very more, to keep the counting of basic frame very big, in order to Simplify, a 10ms radio frames can be divided into 2 5ms wireless frame periods, be denoted as the first 5ms radio frames and second respectively 5ms radio frames, in this way, the BBU in base station is determined when carrying out frequency spectrum switching at the time of the 2nd 5ms radio frames correspond to, base station BBU can be converted to the frequency spectrum switching time when the 2nd 5ms radio frames arrive, it is also necessary to which the quantity of received basic frame is simultaneously The quantity of the basic frame is sent to the RRU of base station, the RRU of base station is when determination receives the 2nd 5ms radio frames, start recording The quantity of received basic frame, the quantity of basic frame that the BBU in the quantity for determining received basic frame with base station is sent are identical When, the RRU of the base station carries out frequency spectrum switching.

For example, the first 5ms radio frames correspond to 7 points to 7 points 15 minutes periods, the 2nd 5ms radio frames it is corresponding 7 points 15 minutes extremely 7 points of 30 minutes periods, if the BBU of base station is determined in 7 points of progresss frequency spectrum switchings in 20 minutes, and determination 7 points 10 minutes to base station RRU sends frequency spectrum switching time, the BBU of base station then by the frequency spectrum switching time received be converted to 7 points 15 minutes with 7: 20/ Between period corresponding basic frame quantity, in this way, the basic frame that the RRU of base station is sent in the BBU for receiving the base station After quantity, the quantity of the received basic frame of start recording, in the base that the BBU for the quantity and base station for determining received basic frame is sent When the quantity of this frame is identical, the RRU of the base station carries out frequency spectrum switching.The above is merely illustrative, and is not construed as limiting.

The frequency spectrum handover information is sent to terminal by the RRU by S103, base station, so that the terminal switches according to the frequency spectrum Time is by the corresponding frequency spectrum of mark that current frequency spectrums of operation switches to the target spectrum.

Specifically, which is encapsulated as radio frames by the RRU by base station, and by eating dishes without rice or wine to be sent to terminal RRU, the RRU of terminal, which passes through, eats dishes without rice or wine to receive the radio frames that the RRU from base station is sent, and radio frames are sent out by CPRI interface The BBU of terminal is given, the BBU of terminal obtains frequency spectrum handover information by parsing the radio frames, and the spectral shaping is switched and is believed Breath is sent to the RRU of terminal by CPRI interface, when obtaining the switching of the frequency spectrum in the frequency spectrum handover information so as to the RRU of the terminal Between and target spectrum mark.When reaching frequency spectrum switching time, the RRU of the terminal is switched to the terminal by current spectral The corresponding frequency spectrum of the mark of the target spectrum, to realize the synchronism switching with the frequency spectrum of base station.

It should be noted that since terminal is in moveable state, when terminal occurs mobile, the RRU and base of terminal The fiducial time of the RRU to stand is likely to be out of synchronization, therefore, if the frequency spectrum switching time that the BBU of terminal is obtained is the specific moment, eventually The BBU at end sends switching time section before reaching the specific moment, to the RRU of terminal, wherein switching time section is the tool Period between at the time of the BBU of body moment and terminal determination transmission frequency spectrum switching time, at this point, the BBU of terminal is needed By the effective marker position in the basic frame comprising switching time section, (the effective marker position can be located at the frame head of basic frame In) be set as significance bit (such as being set as 1), the RRU of terminal is when receiving the radio frames comprising the basic frame, however, it is determined that should The effective marker position of basic frame is significance bit, then the RRU start recording of terminal switching time section, when meter full switching time Section, then the RRU of the terminal carries out frequency spectrum switching according to the mark of target spectrum, so that the terminal is switched to mesh by current spectral Mark frequency spectrum.

For example, the BBU of base station informs that the BBU of terminal carries out frequency spectrum switching 7 points of 30 minutes (i.e. specific moment) in 7 o'clock sharps, For the BBU of terminal when 7 points the specific moment is sent to the RRU of terminal by determination within 20 minutes, the BBU of terminal will include the specific moment Basic frame in effective marker position be set as 1, and determine that the BBU of the terminal determines at the time of send the specific moment at (i.e. 7 points 20 points) and the specific moment (7 points 30 minutes) between period be 10 minutes (i.e. switching time section), and switching time section is sent out It send to the RRU of terminal, the RRU of terminal is when the effective marker position for determining the basic frame is 1, start recording switching time section This is often just subtracted 1 in 10 minutes after one minute when switching time section is denoted as 0(i.e. from 10 minutes start recordings by (i.e. 10 minutes) Minute, until the RRU of the terminal carries out frequency spectrum switching according to the mark of target spectrum, thus by the terminal by working as when being kept to 0) Preceding frequency spectrum switches to target spectrum, is merely illustrative here, is not construed as limiting.

In the alternatively possible implementation of the present invention, if the BBU of terminal received frequency spectrum switching time is the time Section, the BBU of terminal need to be converted to the period the specific moment when sending the period to the RRU of terminal, and by being somebody's turn to do The specific moment obtains the specific moment and the terminal determines switching time section between at the time of sending the period, will be comprising should The effective marker position of the basic frame of switching time section is set as significance bit (such as being set as 1), and the RRU of terminal is receiving the base When this frame, however, it is determined that the effective marker position is significance bit, then the RRU start recording of terminal switching time section, when full this of meter is cut It changes the period, then the RRU of the terminal carries out frequency spectrum switching according to the mark of target spectrum, so that the terminal be cut by current spectral Shift to target spectrum.

It should be noted that when not including frequency spectrum switching time in the basic frame, then the effective marker in the basic frame Position is invalid bit (being set as 0).

It is the scheme of base station by using executing subject, since the CPRI interface between the BBU and RRU of base station is physical layer Interface, therefore, the BBU of base station directly passes through physical layer and frequency spectrum handover information is transmitted to RRU, and should eventually by RRU Frequency spectrum handover information is sent to terminal, the high-rise transmission to bottom (i.e. application layer to physical layer) is needed not move through, to avoid The delay that the frequency spectrum handover information as caused by transmission of the high level to bottom transmits, guarantee base station and terminal can in time into The synchronism switching of line frequency spectrum, avoids the interruption of customer service, improves user experience.

The embodiment of the present invention provides a kind of method of frequency spectrum switching based on cognitive radio, as shown in Fig. 2, this method Executing subject is terminal, this method comprises:

S201, terminal receive the frequency spectrum handover information that base station is sent by RRU.

The frequency spectrum handover information is sent to BBU by CPRI interface by RRU by S202, terminal, so that the BBU is according to this Frequency spectrum handover information obtains mark and frequency spectrum switching time of the target spectrum.

Specifically, the RRU of terminal, which passes through, eats dishes without rice or wine to receive the radio frames that the RRU from base station is sent, and passes through CPRI interface Radio frames are sent to the BBU of terminal, the BBU of terminal obtains frequency spectrum handover information by parsing the radio frames, to obtain mesh Mark mark and the frequency spectrum switching time of frequency spectrum.

S203, terminal are sent out the mark of the target spectrum and the frequency spectrum switching time by the CPRI interface by the BBU It send to RRU, so that the terminal is switched to the target spectrum by current frequency spectrums of operation according to the frequency spectrum switching time by the RRU Identify corresponding frequency spectrum.

In existing CPRI agreement, a kind of CPRI superframe is defined, which includes control word and data, and by 256 basic frame (frame number can be denoted as 0 to 255) compositions, 150 superframes form a radio frames；Due to a basic frame packet Containing 1 control word, therefore, a CPRI superframe includes 256 control words (control font size can be denoted as 0 to 255), and this 256 Control word is divided into 64 subchannels again, and each subchannel includes 4 control words, as shown in the table:

Specifically, the mark of the target spectrum and the frequency spectrum switching time are passed through the CPRI interface by the BBU by terminal Being sent to RRU may include following four mode:

Mode one: terminal is passed through the mark of the target spectrum and the frequency spectrum switching time in CPRI superframe by the BBU Reservation control word be sent to the RRU.

Specifically, it is idle control word due to retaining control word, does not include any information, therefore the BBU of terminal can be with The mark of frequency spectrum switching time and the target spectrum in the frequency spectrum handover information are arranged in the reservation control word, and passed through CPRI interface is sent to the RRU of terminal.

Optionally, the mark of the frequency spectrum switching time and the target spectrum can be set carries out in same reservation control Transmission, certainly, the mark of the frequency spectrum switching time and the target spectrum also can be set in different reservation control words, this hair It is bright that this is not construed as limiting.

For example, the BBU of terminal the frequency spectrum switching time is arranged in the control word that control font size is 15, and by the target The mark of frequency spectrum is arranged in the control word that control font size is 79, is merely illustrative here, this is not limited by the present invention.

Frame head

Frequency spectrum switching time

The mark of target spectrum

The basic frame is encapsulated as radio frames by the BBU of terminal, and the RRU of terminal is sent to by CPRI interface, thus will The mark of the frequency spectrum switching time and target spectrum is sent to the RRU of the terminal.

Mode two: the mark of the target spectrum and the frequency spectrum switching time are passed through ethernet link by the BBU by terminal It is sent to the RRU.

Wherein, which is used for transmission high-speed data.

Specifically, the mark of frequency spectrum switching time and target spectrum in the frequency spectrum handover information are arranged the BBU of terminal In the corresponding control word of the ethernet link (control word of the quick control maintenance channel in i.e. above-mentioned table), and by being somebody's turn to do CPRI interface is sent to the RRU of terminal.

The format of its corresponding basic frame can be following format:

Frame head

Frequency spectrum switching time

The mark of target spectrum

Mode three: the mark of the target spectrum and the frequency spectrum switching time are passed through high-level data chain by the BBU by terminal The road control channel HDLC is sent to the RRU.

Wherein, which is used for transmission low speed data.

Specifically, the BBU of terminal sets the mark of frequency spectrum switching time and the target spectrum in the frequency spectrum handover information It sets in the corresponding control word in the channel HDLC (control word for controlling maintenance channel at a slow speed in i.e. above-mentioned table), and passes through CPRI Interface is sent to the RRU of terminal.

The format of its corresponding basic frame can be following format:

Frame head

Frequency spectrum switching time

The mark of target spectrum

Mode four: the mark of the target spectrum and the frequency spectrum switching time are passed through digital baseband IQ by the BBU by terminal Data channel is sent to the RRU.

Wherein, I/O data channel is used for transmission services data, business number between the BBU of terminal and the RRU of the terminal According to the format for IQ inphase quadrature.

Specifically, the BBU of terminal is when sending I/Q data, by the frequency spectrum handover information frequency spectrum switching time and the mesh The mark of mark frequency spectrum is added in the I/Q data, so that the mark of the frequency spectrum switching time and the target spectrum are sent to the end The RRU at end.

In addition, the format of corresponding basic frame can be following format during transmitting I/O data:

Frame head

Frequency spectrum switching time

The mark of target spectrum

Similarly, base station obtains frequency spectrum handover information, is switched the frequency spectrum by BBU after determining progress frequency spectrum switching Information encapsulation is radio frames, and the radio frames are sent to the RRU by the CPRI interface, and the RRU of the base station is receiving this After frequency spectrum handover information, according to the frequency spectrum switching time in the frequency spectrum handover information by the base station by the mark of current goal frequency spectrum The corresponding frequency spectrum of mark for switching to the target spectrum, to realize the synchronism switching of the frequency spectrum of base station and terminal.

It is the scheme of terminal by using executing subject, the frequency spectrum handover information of acquisition was listened CPRI to connect by the BBU of base station Mouth is sent to the RRU of base station, the frequency spectrum handover information that terminal is sent by the RRU that RRU receives base station, and passing through CPRI interface will The frequency spectrum handover information is sent to the BBU of terminal, the BBU of the terminal according to the frequency spectrum handover information obtain frequency spectrum switching time and The mark of target spectrum, thus according to the mark of frequency spectrum switching time and target spectrum and base station completion frequency spectrum synchronize cut It changes, in this way, due to the interface that the interface between the BBU and RRU of base station and the BBU and RRU of terminal is physical layer, in this way, frequency The transmission of spectrum handover information needs not move through the high-rise transmission to bottom (i.e. application layer to physical layer), so as to avoid due to height The delay that the frequency spectrum handover information caused by transmission of the layer to bottom transmits guarantees that base station and terminal can carry out frequency spectrum in time Synchronism switching avoids the interruption of customer service, improves user experience.

The embodiment of the present invention provides a kind of method of frequency spectrum switching based on cognitive radio, as shown in figure 3, this method packet It includes:

S301, base station obtain frequency spectrum handover information after determining progress frequency spectrum switching.

Specifically, the BBU of base station detects that primary user occurs on current spectral, it is determined that carries out frequency spectrum switching, and really Determine frequency spectrum switching time, and determines idle frequency spectrum as target spectrum from the list for the usable spectrum that itself is stored.

S302, the RRU that the frequency spectrum handover information is sent to the base station by BBU by CPRI interface.

Specifically, which is encapsulated as radio frames by the BBU by base station, and should by the CPRI interface Radio frames are sent to the RRU of base station.

Frame head

Frequency spectrum switching time

The mark of target spectrum

Wherein, which is used for transmission high-speed data.

The format of its corresponding basic frame can be following format:

Frame head

Frequency spectrum switching time

The mark of target spectrum

Mode three: the frequency spectrum handover information is sent to by base station by BBU by the channel High-Level Data Link Control HDLC The RRU.

Wherein, which is used for transmission low speed data.

The format of its corresponding basic frame can be following format:

Frame head

Frequency spectrum switching time

The mark of target spectrum

Frame head

Frequency spectrum switching time

The mark of target spectrum

S303, base station RRU pass through the RRU for eating dishes without rice or wine for frequency spectrum handover information to be sent to terminal.

Specifically, the RRU of base station is by eating dishes without rice or wine for the frequency spectrum handover information to be encapsulated as radio frames, and the radio frames are passed through Eat dishes without rice or wine the RRU for being sent to terminal.

S304, terminal RRU frequency spectrum handover information is sent to by terminal BBU by CPRI interface.

Specifically, after radio frames of the RRU of terminal by the RRU transmission for eating dishes without rice or wine to receive base station, which is passed through CPRI interface is sent to the BBU of terminal.

It should be noted that the specific implementation of the step can pass through BBU for the frequency with reference to base station in step S302 Spectrum handover information is sent to four kinds of modes of the RRU of the base station by CPRI interface, and details are not described herein again.

S305, terminal BBU the mark of frequency spectrum switching time and target spectrum is obtained according to the frequency spectrum handover information.

S306, terminal BBU the mark of the frequency spectrum switching time and the target spectrum are sent to by end by CPRI interface The RRU at end.

Specifically, the BBU of terminal parses the radio frames, obtains the mark of frequency spectrum switching time and target spectrum, and lead to Cross the RRU that the mark of the frequency spectrum switching time and target spectrum are sent to terminal by CPRI interface.

S307, terminal RRU the terminal is switched to by current frequency spectrums of operation by the target according to the frequency spectrum switching time The corresponding frequency spectrum of the mark of frequency spectrum.

S308, base station RRU the base station is switched to by current frequency spectrums of operation by the target according to the frequency spectrum switching time The corresponding frequency spectrum of the mark of frequency spectrum.

It should be noted that the position due to base station immobilizes, the BBU of base station is transmitting base to the RRU of base station Time delay is fixed during this frame, in addition, the BBU of base station is being obtained since the duration of basic frame is fixed (265 nanosecond) After getting frequency spectrum switching time, which is converted to the quantity of corresponding basic frame according to the duration of basic frame, And it sets the effective marker position of the basic frame comprising switching time section to significance bit (such as being set as 1), and this is basic The quantity of frame is sent to the RRU of the base station, and the RRU of base station is in the effective marker position for receiving the basic frame and the determining basic frame It after significance bit, is counted according to the quantity of the basic frame, reaches the basic frame in the quantity of subsequently received basic frame Quantity when, the RRU of base station carries out frequency spectrum switching.

By using above scheme, since the interface between the BBU and RRU of base station and the BBU and RRU of terminal is physics The interface of layer, in this way, the transmission of frequency spectrum handover information needs not move through the high-rise transmission to bottom (i.e. application layer to physical layer), So as to avoid the delay that the frequency spectrum handover information as caused by transmission of the high level to bottom transmits, guarantee base station and terminal energy Enough synchronism switchings for carrying out frequency spectrum in time, avoid the interruption of customer service, improve user experience.

It should be noted that for simple description, therefore, it is stated as a series of dynamic for above method embodiment It combines, but those skilled in the art should understand that, the present invention is not limited by the sequence of acts described.Secondly, this Field technical staff also should be aware of, and the embodiments described in the specification are all preferred embodiments, it is related movement and Module is not necessarily essential to the invention.

The embodiment of the present invention provides a kind of base station 40, as shown in figure 4, the base station 40 includes BBU41 and RRU42,

The BBU41, for obtaining frequency spectrum handover information, and by the frequency spectrum handover information after determining and carrying out frequency spectrum switching The RRU is sent to by CPRI interface.

Wherein, which includes mark and the frequency spectrum switching time of target spectrum.

The RRU42, the frequency spectrum handover information for obtaining the BBU41 are sent to terminal, so that the terminal is according to the frequency The corresponding frequency spectrum of mark that spectrum switching time switches to the target spectrum by current frequency spectrums of operation.

The RRU42 is also used to, and the base station is switched to this by current spectral according to the frequency spectrum switching time that the BBU41 is sent The corresponding frequency spectrum of the mark of target spectrum.

Further, which is specifically used for, which is encapsulated as radio frames, and connect by the CPRI The radio frames are sent to the RRU by mouth.

Optionally, which is specifically used for, which is sent by the reservation control word in CPRI superframe To the RRU42.

It should be noted that the mark of the frequency spectrum switching time and the target spectrum can be set in same reservation control word In transmitted, certainly, the mark of the frequency spectrum switching time and the target spectrum also can be set in different reservation control words In, this is not limited by the present invention.

Frame head

Frequency spectrum switching time

The mark of target spectrum

Optionally, which is specifically used for, which is sent to the RRU42 by ethernet link.

Wherein, which is used for transmission high-speed data.

Frame head

Frequency spectrum switching time

The mark of target spectrum

Optionally, which is specifically used for, which is sent out by the channel High-Level Data Link Control HDLC It send to the RRU42.

Wherein, which is used for transmission low speed data.

The format of its corresponding basic frame can be following format:

Frame head

Frequency spectrum switching time

The mark of target spectrum

Optionally, which is specifically used for, which is sent to this by digital baseband I/Q data channel RRU42。

Frame head

Frequency spectrum switching time

The mark of target spectrum

It should be noted that the RRU of terminal, which passes through, eats dishes without rice or wine to receive the frequency spectrum handover information that the RRU of base station is sent, and should Frequency spectrum handover information is sent to the BBU of terminal, and the BBU of terminal obtains frequency spectrum switching time and target according to the frequency spectrum handover information The mark of frequency spectrum, and the mark of the frequency spectrum switching time and target spectrum are sent to the RRU of terminal, so as to the RRU of the terminal The corresponding frequency spectrum of mark that the terminal is switched into the target spectrum by current frequency spectrums of operation according to the frequency spectrum switching time.

Optionally, since terminal is in moveable state, when terminal occurs mobile, the RRU of terminal and the RRU of base station Fiducial time be likely to be out of synchronization, therefore, if the BBU of terminal obtained frequency spectrum switching time is specific moment, the BBU of terminal Before reaching the specific moment, switching time section is sent to the RRU of terminal, wherein switching time section is the specific moment The period between at the time of sending the frequency spectrum switching time is determined with the BBU of the terminal, at this point, the BBU of terminal needs to wrap Effective marker position (the effective marker position can be located in the frame head of basic frame) setting in the basic frame of the section containing the switching time For significance bit (such as being set as 1), the RRU of terminal is when receiving the radio frames comprising the basic frame, however, it is determined that the basic frame Effective marker position be significance bit, then the RRU start recording of terminal switching time section then should when counting full switching time section The RRU of terminal carries out frequency spectrum switching according to the mark of target spectrum, so that the terminal is switched to target spectrum by current spectral.

By using above-mentioned base station, since the CPRI interface between the BBU and RRU of base station is the interface of physical layer, The BBU of base station directly passes through physical layer and frequency spectrum handover information is transmitted to RRU, and eventually by RRU by the frequency spectrum handover information Be sent to terminal, need not move through the high-rise transmission to bottom (i.e. application layer to physical layer), so as to avoid due to it is high-rise extremely The delay of the transmission of the frequency spectrum handover information caused by the transmission of bottom guarantees that base station can carry out the synchronous of frequency spectrum with terminal in time Switching, avoids the interruption of customer service, improves user experience.

Affiliated those skilled in the art can be understood that, for convenience and simplicity of description, the base of foregoing description The specific work process and description stood, can be no longer superfluous herein with reference to the corresponding process in aforementioned embodiment of the method shown in FIG. 1 It states.

The embodiment of the present invention provides a kind of terminal 50, as shown in figure 5, the terminal 50 includes: BBU51 and RRU52；

The RRU52 is sent out the frequency spectrum handover information by CPRI interface for receiving the frequency spectrum handover information of base station transmission It send to BBU51.

The BBU51, the frequency spectrum handover information for being sent according to the RRU52 obtain the mark and the frequency spectrum of the target spectrum Switching time, and the mark of the target spectrum and the frequency spectrum switching time are sent to RRU52 by the CPRI interface.

The RRU52 is also used to, and the terminal is switched to the target by current frequency spectrums of operation according to the frequency spectrum switching time The corresponding frequency spectrum of the mark of frequency spectrum.

Optionally, which is specifically used for, and the mark of the target spectrum and the frequency spectrum switching time are passed through CPRI superframe In reservation control word be sent to the RRU52.

It should be noted that the mark of the frequency spectrum switching time and the target spectrum, which can be set, controls son in same reservation In transmitted, certainly, the mark of the frequency spectrum switching time and the target spectrum also can be set in different reservation control words In, this is not limited by the present invention.

Frame head

Frequency spectrum switching time

The mark of target spectrum

Optionally, which is specifically used for, and the mark of the target spectrum and the frequency spectrum switching time are passed through ether network chain Road is sent to the RRU52.

Wherein, which is used for transmission high-speed data.

The format of its corresponding basic frame can be following format:

Frame head

Frequency spectrum switching time

The mark of target spectrum

Optionally, which is specifically used for, and the mark of the target spectrum and the frequency spectrum switching time are passed through high-level data The link control channel HDLC is sent to the RRU52.

Wherein, which is used for transmission low speed data.

The format of its corresponding basic frame can be following format:

Frame head

Frequency spectrum switching time

The mark of target spectrum

Optionally, which is specifically used for, and the mark of the target spectrum and the frequency spectrum switching time are passed through digital baseband I/Q data channel is sent to the RRU52.

Frame head

Frequency spectrum switching time

The mark of target spectrum

It is the scheme of terminal by using executing subject, due between the BBU and RRU of base station and the BBU and RRU of terminal Interface be physical layer interface, in this way, the transmission of frequency spectrum handover information need not move through it is high-rise to bottom (i.e. application layer to object Manage layer) transmission guarantee so as to avoid the delay that the frequency spectrum handover information as caused by transmission of the high level to bottom transmits Base station and terminal can carry out the synchronism switching of frequency spectrum in time, avoid the interruption of customer service, improve user experience.

Affiliated those skilled in the art can be understood that, for convenience and simplicity of description, the base of foregoing description The specific work process and description stood, can be no longer superfluous herein with reference to the corresponding process in aforementioned embodiment of the method shown in Fig. 2 It states.

The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. a kind of method of the frequency spectrum switching based on cognitive radio characterized by comprising

Base station obtains frequency spectrum handover information after determining progress frequency spectrum switching, wherein the frequency spectrum handover information includes target frequency The mark of spectrum and frequency spectrum switching time；

The frequency spectrum handover information is sent to by general public radio interface CPRI interface by the Base Band Unit BBU of base station The radio frequency remote unit RRU of the base station；

The frequency spectrum handover information is sent to the RRU of terminal by the RRU of the base station, so as to the terminal RRU by institute State the BBU that frequency spectrum handover information is sent to the terminal, and by the BBU of the terminal by the mark of the target spectrum and institute The RRU that frequency spectrum switching time is sent to the terminal is stated, so that the RRU of the terminal obtains mesh according to the frequency spectrum handover information Mark and the frequency spectrum switching time of frequency spectrum are marked, and the mesh is switched to by current frequency spectrums of operation according to the frequency spectrum switching time Mark the corresponding frequency spectrum of mark of frequency spectrum.

2. the method according to claim 1, wherein described switched the frequency spectrum by Base Band Unit BBU is believed It ceases through the radio frequency remote unit RRU that CPRI interface is sent to the base station and includes:

The frequency spectrum handover information is encapsulated as radio frames by the BBU of the base station, and will be described by the CPRI interface Radio frames are sent to the RRU of the base station.

3. method according to claim 1 or 2, which is characterized in that the BBU by base station, which switches the frequency spectrum, to be believed It ceases through the RRU that CPRI interface is sent to the base station and includes:

The frequency spectrum handover information is sent to the base by the reservation control word in CPRI superframe by the BBU of the base station The RRU to stand.

4. method according to claim 1 or 2, which is characterized in that the BBU by base station, which switches the frequency spectrum, to be believed It ceases through the RRU that CPRI interface is sent to the base station and includes:

The frequency spectrum handover information is sent to the RRU of the base station by the BBU of the base station by ethernet link.

5. method according to claim 1 or 2, which is characterized in that described to be passed through the frequency spectrum handover information by BBU The RRU that CPRI interface is sent to the base station includes:

The frequency spectrum handover information is sent to by the channel High-Level Data Link Control HDLC by the BBU of the base station described The RRU of base station.

6. method according to claim 1 or 2, which is characterized in that the BBU by base station, which switches the frequency spectrum, to be believed It ceases through the RRU that CPRI interface is sent to the base station and includes:

The frequency spectrum handover information is sent to the base station by digital baseband I/Q data channel by the BBU of the base station RRU。

7. a kind of method of the frequency spectrum switching based on cognitive radio characterized by comprising

Terminal receives the frequency spectrum handover information that base station is sent by the terminal radio frequency extension unit RRU of the terminal, wherein described Frequency spectrum handover information includes mark and the frequency spectrum switching time of target spectrum；

The frequency spectrum handover information is sent to by general public radio interface CPRI interface by the RRU of the terminal described The terminal baseband unit B BU of terminal, so that the BBU of the terminal obtains the target spectrum according to the frequency spectrum handover information Mark and the frequency spectrum switching time；

The mark of the target spectrum and the frequency spectrum switching time are sent out by the CPRI interface by the BBU of the terminal Send to the RRU of the terminal, so as to the terminal RRU according to the frequency spectrum switching time by the terminal by current work Frequency spectrum switches to the corresponding frequency spectrum of mark of the target spectrum.

8. the method according to the description of claim 7 is characterized in that the BBU by the terminal is by the target spectrum Mark and the frequency spectrum switching time by the RRU that the CPRI interface is sent to terminal include:

The mark of the target spectrum and the frequency spectrum switching time are passed through into the guarantor in CPRI superframe by the BBU of the terminal Control word is stayed to be sent to the RRU of the terminal.

9. the method according to the description of claim 7 is characterized in that the BBU by the terminal is by the target spectrum Mark and the frequency spectrum switching time by the RRU that the CPRI interface is sent to terminal include:

The mark of the target spectrum and the frequency spectrum switching time are sent by ethernet link by the BBU of the terminal To the RRU of the terminal.

10. the method according to the description of claim 7 is characterized in that the BBU of the terminal will be described by the CPRI interface The RRU that the mark of frequency spectrum switching time and the target spectrum is sent to the terminal includes:

The mark of the target spectrum and the frequency spectrum switching time are passed through into high-level data link control by the BBU of the terminal The channel HDLC processed is sent to the RRU.

11. the method according to the description of claim 7 is characterized in that the BBU of the terminal will be described by the CPRI interface The RRU that the mark of frequency spectrum switching time and the target spectrum is sent to the terminal includes:

The mark of the target spectrum and the frequency spectrum switching time are sent out by digital baseband I/Q data channel by the BBU It send to the RRU of the terminal.

12. a kind of base station characterized by comprising the Base Band Unit BBU of base station and the radio frequency remote unit RRU of base station；

The BBU of the base station, for obtaining frequency spectrum handover information, and the frequency spectrum is switched after determining progress frequency spectrum switching Information is sent to the RRU of the base station by general public radio interface CPRI interface, wherein the frequency spectrum handover information includes The mark of target spectrum and frequency spectrum switching time；

The RRU of the base station, for the frequency spectrum handover information of the BBU acquisition of the base station to be sent to the RRU of terminal, with toilet The frequency spectrum handover information is sent to the BBU of the terminal by the RRU for stating terminal, and by the BBU of the terminal by the mesh The mark of mark frequency spectrum and the frequency spectrum switching time are sent to the RRU of the terminal, so that the RRU of the terminal is according to the frequency Spectrum handover information obtains mark and the frequency spectrum switching time of target spectrum, and according to the frequency spectrum switching time by current work Frequency spectrum switches to the corresponding frequency spectrum of mark of the target spectrum；

The RRU of the base station is also used to, and the frequency spectrum switching time sent according to the BBU of the base station is by the base station by current frequency Spectrum switches to the corresponding frequency spectrum of mark of the target spectrum.

13. base station according to claim 12, which is characterized in that the BBU of the base station is specifically used for, and the frequency spectrum is cut Changing Information encapsulation is radio frames, and the radio frames are sent to the RRU of the base station by the CPRI interface.

14. base station according to claim 12 or 13, which is characterized in that the BBU of the base station is specifically used for, by the frequency Spectrum handover information is sent to the RRU of the base station by the reservation control word in CPRI superframe.

15. base station according to claim 12 or 13, which is characterized in that the BBU of the base station is specifically used for, by the frequency Spectrum handover information is sent to the RRU of the base station by ethernet link.

16. base station according to claim 12 or 13, which is characterized in that the BBU of the base station is specifically used for, by the frequency Spectrum handover information is sent to the RRU of the base station by the channel High-Level Data Link Control HDLC.

17. base station according to claim 12 or 13, which is characterized in that the BBU of the base station is specifically used for, by the frequency Spectrum handover information is sent to the RRU of the base station by digital baseband I/Q data channel.

18. a kind of terminal characterized by comprising the Base Band Unit BBU of terminal and the radio frequency remote unit RRU of terminal；

The frequency spectrum handover information is passed through general public affairs for receiving the frequency spectrum handover information of base station transmission by the RRU of the terminal Many radio interface CPRI interfaces are sent to the BBU of terminal, wherein the frequency spectrum handover information includes the mark and frequency of target spectrum Compose switching time；

The BBU of the terminal, the frequency spectrum handover information for being sent according to the RRU obtain mark and the institute of the target spectrum Frequency spectrum switching time is stated, and the mark of the target spectrum and the frequency spectrum switching time are sent to by the CPRI interface The RRU of terminal；

The RRU of the terminal is also used to, and is switched to the terminal by current frequency spectrums of operation according to the frequency spectrum switching time The corresponding frequency spectrum of the mark of the target spectrum.

19. terminal according to claim 18, which is characterized in that the BBU of the terminal is specifically used for, by the target frequency The mark of spectrum and the frequency spectrum switching time are sent to the RRU of the terminal by the reservation control word in CPRI superframe.

20. terminal according to claim 18, which is characterized in that the BBU of the terminal is specifically used for, by the target frequency The mark of spectrum and the frequency spectrum switching time are sent to the RRU of the terminal by ethernet link.

21. terminal according to claim 18, which is characterized in that the BBU of the terminal is specifically used for, by the target frequency The mark of spectrum and the frequency spectrum switching time are sent to the RRU of the terminal by the channel High-Level Data Link Control HDLC.

22. terminal according to claim 18, which is characterized in that the RRU of the terminal is specifically used for, by the target frequency The mark of spectrum and the frequency spectrum switching time are sent to the RRU of the terminal by digital baseband I/Q data channel.