CN102104812B - Method for automatically selecting wavelength and optical module - Google Patents
Method for automatically selecting wavelength and optical module Download PDFInfo
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- CN102104812B CN102104812B CN2009102543641A CN200910254364A CN102104812B CN 102104812 B CN102104812 B CN 102104812B CN 2009102543641 A CN2009102543641 A CN 2009102543641A CN 200910254364 A CN200910254364 A CN 200910254364A CN 102104812 B CN102104812 B CN 102104812B
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Abstract
The embodiment of the invention provides a method for automatically selecting a wavelength, comprising the following steps: carrying out signal detection on an uplink wavelength to determine whether the uplink wavelength is idle; transmitting an optical signal with a preset special signal feature on a corresponding downlink wavelength when the uplink wavelength is idle in order to inform a remoteend device that the downlink wavelength is idle and cause the remote end device to configure the wavelength according to the uplink wavelength and the downlink wavelength which are corresponding to the downlink wavelength; receiving an uplink data optical signal transmitted by the remote end device on the uplink wavelength, and transmitting a downlink data optical signal on the downlink wavelength. The embodiment of the invention further provides an optical module.
Description
Technical field
The invention belongs to the optical communication technique field, relate in particular to method and optical module that a kind of wavelength is selected automatically.
Background technology
Common public radio interface (CPRI, Common Public Radio Interface) be radio equipment controller (REC in the wireless base station device, Radio Equipment Controller) and the interface standard between the wireless device (RE, Radio Equipment).The link of CPRI refers to the two-way link between direct-connected REC and RE or two the RE nodes.What adopt between REC and the RE is point-to-point communication.During present CPRI used, REC and RE generally used optical module and two fibre of fixed wave length, i.e. optical fiber of each direction, and only transmit the light signal of a fixed wave length in every optical fiber, for example 850nm, 1310nm or 1550nm etc.
At present, industry has proposed optical distribution network (ODN, Optical Distribution Network) the transmission CPRI link data by existing passive optical-fiber network (PON, Passive Optical Network), i.e. the scheme of ODN is shared in multi-service.In this scheme, several REC are concentrated be placed on local side, these REC can be placed on a machine room with the optical line terminal (OLT, Optical Line Terminate) of PON, and RE is distributed in each place, base station or each end.Connect by the optical fiber of ODN network in wavelength division multiplexing (WDM, Wavelength-Division Multiplexing) mode between REC and the RE.CPRI link between REC and the RE uses a pair of wavelength, is respectively applied to uplink downlink.In this system, REC need adopt the optical module of specific transmitting-receiving wavelength, i.e. the optical module of fixed wave length, and RE adopts the optical module of wavelength-tunable, and these tunable optical modules all adopt support can plug the encapsulation of function.
But such scheme is faced with the wavelength of the tunable optical module of following problem: RE and how disposes when RE and REC are connected and do not clash.The means that adopt are based on the Wavelength Assignment mechanism of MAC layer at present, but because this mechanism is relevant with agreement itself, adopt this mechanism must revise existing protocol, this all needs to revise the software and hardware of REC and RE, the deployment of REC and RE at present is commonplace, and is too high to the maintenance cost of whole REC and RE.
Summary of the invention
In view of this, the purpose of the embodiment of the invention is to provide a kind of wavelength method and the optical module of selection automatically, can make the upgrade maintenance of system more simple and convenient.
The method that the embodiment of the invention at first provides a kind of wavelength to select automatically, this method comprises: carry out input to determine whether described up wavelength is idle at up wavelength; When determining described upgoing wave long idle, downstream wavelength in correspondence sends the light signal with default signal specific feature, to notify the described downstream wavelength free time of remote equipment and to make described remote equipment carry out wavelength configuration according to the up-downgoing wavelength corresponding with described downstream wavelength; Receive the upstream data light signal that is sent by described remote equipment at described up wavelength, and send the downlink data light signal in described downstream wavelength.
The method that the embodiment of the invention also provides another kind of wavelength automatically to select, this method comprises: select a pair of up-downgoing wavelength and carry out wavelength pre-configured from the Wavelength Assignment table; Whether whether detection receives the light signal with default signal specific feature in selected downstream wavelength, idle to judge described downstream wavelength; Judging described downstream wavelength during the free time, selected up-downgoing wavelength is being configured to corresponding emission wavelength respectively and receives wavelength, and carry out emission and the reception of up-downgoing data-signal at described up-downgoing wavelength.
The embodiment of the invention also provides a kind of optical module, comprising: transmitter, receiver, channel status detection module; Wherein, described receiver is used for receiving uplink optical signal at the upgoing wave product; The channel status detection module is used for that the light signal that described receiver receives is carried out wavelength and detects to confirm whether described up wavelength is idle; Described transmitter, be used for when definite described upgoing wave long idle, downstream wavelength in correspondence sends the light signal with default signal specific feature, to notify the described downstream wavelength free time of remote equipment and to make described remote equipment carry out wavelength configuration according to the up-downgoing wavelength corresponding with described downstream wavelength.
The embodiment of the invention also provides another kind of optical module, comprising: receiver, transmitter, channel status detection module, passage configuration module and memory cell; Wherein, described memory cell is used for storing the Wavelength Assignment table in advance, and described Wavelength Assignment table comprises many to alternative up-downgoing wavelength; Described passage configuration module, wavelength is pre-configured for carrying out from a pair of up-downgoing wavelength of above-mentioned Wavelength Assignment table selection, and is judging described downstream wavelength is configured to selected up-downgoing wavelength respectively correspondence during the free time emission wavelength and emission and the reception of reception wavelength to carry out the up-downgoing data-signal; Described channel status detection module, for detection of on selected downstream wavelength, whether receiving the light signal with default signal specific feature, whether idle to judge described downstream wavelength.
Utilize wavelength automatic selecting method that present embodiment provides and optical module can realize up wavelength between REC and the RE and the selection of downstream wavelength, and the optical module that carries out the wavelength selection all is that support is pluggable, thereby can reduce the change to REC and RE equipment itself, make the upgrade maintenance of system more simple and convenient.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the Organization Chart of the method system applicatory selected automatically of the wavelength that provides of the embodiment of the invention;
Fig. 2 is the flow chart of the method selected automatically of the wavelength that provides of the embodiment of the invention one;
Fig. 3 is the flow chart of the method selected automatically of the wavelength that provides of the embodiment of the invention two;
Fig. 4 is the schematic diagram of the optical module that provides of the embodiment of the invention three;
Fig. 5 is the flow chart of the method selected automatically of the wavelength that provides of the embodiment of the invention four;
Fig. 6 is that the embodiment of the invention five provides the wavelength flow chart of the method for selection automatically;
Fig. 7 is that the embodiment of the invention six provides the wavelength flow chart of the method for selection automatically;
Fig. 8 is the schematic diagram of the optical module that provides of the embodiment of the invention seven;
Fig. 9 is the schematic diagram of the optical module that provides of the embodiment of the invention eight;
Figure 10 is that the embodiment of the invention nine provides the wavelength flow chart of the method for selection automatically;
Figure 11 is that the embodiment of the invention ten provides the wavelength flow chart of the method for selection automatically;
Figure 12 is the schematic diagram of the optical module that provides of the embodiment of the invention 11;
Figure 13 is the schematic diagram of the optical module that provides of the embodiment of the invention 12.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.
Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The embodiment of the invention can be applicable to the system that optical distribution network is shared in multi-service shown in Figure 1.As shown in Figure 1, this system comprises optical line terminal OLT and the radio equipment controller REC that is arranged on local side, and the optical network unit ONU and the wireless device RE that are arranged on user's side (such as being positioned at base station or end).Wherein, OLT is connected to ONU by optical distribution network ODN and in the mode of putting multiple spot, and can carry out business transmission or other communications according to the regulation of passive optical network PON agreement between OLT and the ONU.And connect with WDM mode and the optical fiber by the ODN network between REC and the RE, and the mode by point-to-point communicates between REC and the RE, and its communication service is carried on described ODN.CPRI link between REC and the RE uses a pair of up-downgoing wavelength (such as λ d1 and λ u1, λ d2 and λ u2) to be respectively applied to uplink downlink.
The operable a kind of network system of the embodiment of the invention though Fig. 1 has schematically drawn,, should be appreciated that the various schemes that the embodiment of the invention provides can also be applied in other network systems
In embodiments of the present invention, up direction refers to the direction of the transmission from RE to REC, and described down direction refers to the direction of the transmission from REC to RE.Therefore, the emission wavelength of the optical module of RE is corresponding to up wavelength, and it receives wavelength corresponding to downstream wavelength; In like manner, the emission wavelength of the optical module of REC is corresponding to downstream wavelength, and it receives wavelength corresponding to up wavelength.
In specific embodiment, each can be bound the REC of mutual communication and the up wavelength between the RE and downstream wavelength.Wherein, REC can adopt the optical module of fixed wave length to carry out the transmitting-receiving of light signal, therefore the emission wavelength of the optical module of REC and reception wavelength are fixed, and that RE can adopt the tunable optical module to carry out optical signal transceiver is colourless with the light source of realizing RE, thereby reduce the cost of storage and O﹠M, so the emission wavelength of the optical module of RE is adjustable with receiving wavelength.And in specific embodiment, the optical module that REC and RE adopt all can adopt the encapsulation of supporting the hot plug function.
The optical module of REC judges by detecting received optical power whether corresponding up wavelength is idle, when described upgoing wave long idle, produces the light signal with signal specific feature in the downstream wavelength of correspondence, can use to inform described up wavelength to RE.
Further, optical module at RE may be configured with the Wavelength Assignment table, described Wavelength Assignment table can be stored selectable, paired up wavelength and downstream wavelength information in advance, the up wavelength of storing in the Wavelength Assignment table and downstream wavelength information are nonvoid subset or the complete or collected works of whole up wavelength and downstream wavelength in this ODN network, and are the corresponding relation of determining between up wavelength and the downstream wavelength.
Can from described Wavelength Assignment table, select a downstream wavelength to be configured to the reception wavelength of adjustable receiver of the optical module of RE behind the optical module electrifying startup of RE, and select corresponding up wavelength to be configured to the emission wavelength of adjustable transmitter capable of the optical module of RE, if RE detects the light signal of specific characteristic in selected downstream wavelength, represent that then this downstream wavelength is idle, should be all to be idle to up wavelength and downstream wavelength namely also, adopt this REC to up wavelength and downstream wavelength also to insert without any RE in other words, thereby RE can carry out two-way communication with reception wavelength and REC by the emission wavelength of this selection.
The method that the embodiment of the invention at first provides a kind of wavelength to select automatically, it can be applicable to REC.
Particularly, described wavelength automatic selecting method comprises: carry out input to determine whether described up wavelength is idle at up wavelength; When determining described upgoing wave long idle, downstream wavelength in correspondence sends the light signal with default signal specific feature, to notify the described downstream wavelength free time of remote equipment and to make described remote equipment carry out wavelength configuration according to the up-downgoing wavelength corresponding with described downstream wavelength; Receive the upstream data light signal that is sent by described remote equipment at described up wavelength, and send the downlink data light signal in described downstream wavelength.
In a kind of specific embodiment, further, describedly carry out input to determine whether idle step can comprise described up wavelength: the integrated power that detects its corresponding dropout LOS signal at up wavelength at up wavelength; Whether the integrated power of judging detected LOS signal surpasses first threshold; If surpass first threshold, then determine described upgoing wave long idle.
In a kind of specific embodiment, further, the step that described downstream wavelength in correspondence sends the light signal with signal specific feature can comprise: according to the light signal strength on the described downstream wavelength of predetermined change frequency periodically-varied periodic variation, and at the described light signal with cyclic variation intensity of described downstream wavelength transmission; Perhaps, send low frequency light signal and normal data-signal according to the switching of predetermined frequency period, and send the light signal that described periodicity hand-off process obtains in described downstream wavelength; Perhaps, transmission according to predetermined frequency period switch transmitter enables the TX_Enable signal, to obtain the light signal of discontinuity, and sending the light signal of described discontinuity in described downstream wavelength, the light signal of wherein said discontinuity specifically refers to light and the unglazed interlaced and signal that forms.
In specific embodiment, above wavelength automatic selecting method can also comprise: detect described up wavelength in the process of carrying out the transmission of data light signal whether signal conflict takes place; If detect in Preset Time at described up wavelength signal conflict does not take place, wavelength is selected to finish automatically.Further, the up wavelength of described detection step that whether signal conflict take place can comprise: detect the luminous power that receives at described up wavelength and second threshold value whether occurs increasing suddenly and surpassing; If then judge at up wavelength signal conflict take place.In addition, when judging the generation signal conflict, can further produce and send the LOS signal, and restart wavelength and select.
The method that the embodiment of the invention also provides another kind of wavelength to select automatically, it can be applicable to RE.
Particularly, the method that described wavelength is automatically selected can comprise: select a pair of up-downgoing wavelength and carry out wavelength pre-configured from the Wavelength Assignment table; Whether whether detection receives the light signal with default signal specific feature in selected downstream wavelength, idle to judge described downstream wavelength; Judging described downstream wavelength during the free time, selected up-downgoing wavelength is being configured to corresponding emission wavelength respectively and receives wavelength, and carry out emission and the reception of up-downgoing data-signal at described up-downgoing wavelength.
In specific embodiment, further, described wavelength automatic selecting method can also comprise: judging described downstream wavelength when busy, wait for after the Preset Time, in described Wavelength Assignment table, reselect a pair of up-downgoing wavelength, and the pre-configured and wavelength idle-detection of wavelength again.And described Preset Time is at least the transmitting uplink data time and adds corresponding maximum downstream data transmission period, and comprises the data processing time of local side and terminal.
Further, in a kind of specific embodiment, described detection can comprise in the step whether selected downstream wavelength receives the light signal with default signal specific feature:
The intensity instruction signal of the light signal correspondence that detection receives in described downstream wavelength, and when described intensity instruction signal indicates the intensity of described light signal to be periodically-varied, judge the described downstream wavelength free time; Perhaps,
The light signal that receives in described downstream wavelength is carried out low-pass filtering, the light signal after the low-pass filtering is detected to judge whether described light signal comprises default low frequency light signal, if judge the described downstream wavelength free time; Perhaps
Whether detection is the light signal of discontinuity at the light signal that described downstream wavelength receives, if judge the described downstream wavelength free time; Perhaps.
Detect the integrated power of the LOS signal on the described downstream wavelength, if described integrated power is then judged the described downstream wavelength free time greater than 0 and less than a default thresholding.
The embodiment of the invention also provides a kind of optical module, and it can be applicable to REC.
Particularly, described optical module can comprise: transmitter, receiver, channel status detection module; Wherein, described receiver is used for receiving uplink optical signal at the upgoing wave product; The channel status detection module is used for that the light signal that described receiver receives is carried out wavelength and detects to confirm whether described up wavelength is idle; Described transmitter, be used for when definite described upgoing wave long idle, downstream wavelength in correspondence sends the light signal with default signal specific feature, to notify the described downstream wavelength free time of remote equipment and to make described remote equipment carry out wavelength configuration according to the up-downgoing wavelength corresponding with described downstream wavelength.
Further, in specific embodiment, described optical module can also comprise: bias current arranges module, be used for to receive the index signal that sends when described channel status detection module is confirmed described upgoing wave long idle, and according to the bias current of the described transmitter of described index signal periodically-varied or the size of modulated current, so that the light signal that the emission of described transmitter has cyclic variation intensity; Perhaps, handover module is used for periodic low frequency light signal and the normal data-signal of switching, so that described transmitter sends the light signal that described periodicity hand-off process obtains in described downstream wavelength; Send control module, the transmission that is used for the periodic switch transmitter enables the TX_Enable signal, so that described transmitter sends the light signal of discontinuity in described downstream wavelength.
The embodiment of the invention also provides another kind of optical module, and it can be applicable to RE.
Particularly, described optical module can comprise: receiver, transmitter, channel status detection module, passage configuration module and memory cell; Wherein, described memory cell is used for storing the Wavelength Assignment table in advance, and described Wavelength Assignment table comprises many to alternative up-downgoing wavelength; Described passage configuration module, wavelength is pre-configured for carrying out from a pair of up-downgoing wavelength of above-mentioned Wavelength Assignment table selection, and is judging described downstream wavelength is configured to selected up-downgoing wavelength respectively correspondence during the free time emission wavelength and emission and the reception of reception wavelength to carry out the up-downgoing data-signal; Described channel status detection module, for detection of on selected downstream wavelength, whether receiving the light signal with default signal specific feature, whether idle to judge described downstream wavelength.
Further, in one embodiment, described light signal with default signal specific feature comprises: have the light signal, low frequency light signal of cyclic variation intensity and light signal that normal data-signal periodically switches or the light signal of discontinuity.
Further, in specific embodiment, when the light signal of described default signal specific feature is when having the light signal of cyclic variation intensity, the intensity instruction signal to the light signal correspondence that receives in described downstream wavelength of specifically being used for described channel status detection module detects when determining that its described intensity instruction signal indicates the intensity of described light signal to be periodically-varied, judges the described downstream wavelength free time; Perhaps
When the light signal of described default signal specific feature be low frequency light signal and normal data-signal periodically switch light signal the time, described channel status detection module specifically is used for the light signal that receives in described downstream wavelength is carried out low-pass filtering, light signal after the low-pass filtering is detected to judge whether described light signal comprises default low frequency light signal, if judge the described downstream wavelength free time; Perhaps
When the light signal of described default signal specific feature is the light signal of discontinuity, whether described channel status detection module is the light signal of discontinuity for detection of the light signal that receives in described downstream wavelength specifically, if judge the described downstream wavelength free time.
As mentioned above, the light signal with signal specific feature that REC produces in downstream wavelength can have multiple different form, multi-form with the light signal employing of this special characteristic respectively among the following embodiment is example, describes the wavelength provided by the invention specific implementation of the method for selection automatically in detail.
Embodiment one
The method that present embodiment provides a kind of wavelength to select automatically, this method can be carried out in optical module (such as the pluggable fixed wave length optical module) side of REC, and as shown in Figure 2, this method comprises:
Step S101:REC detects the integrated power of LOS (dropout, the Loss OfSignal) signal of the up wavelength of its correspondence;
According to the CPRI agreement, after starting, REC and RE can enter synchronously and the rate consulation state.Under synchronous and rate consulation state, REC sends downstream signal, and waits for the upward signal that receives the RE response with the phase same rate.RE was in the not luminance that powers on synchronously reaching speed with REC, and also, the optical module of REC can not receive any light signal before the response that receives RE.This programme utilizes these characteristics of CPRI agreement, can allow the optical module of REC judge whether the REC equipment at self place has had RE to insert, and judges up wavelength that optical module receives wavelength correspondence free time whether.
When the upgoing wave long idle, the optical module in REC detects less than uplink optical signal, can produce the LOS signal, and namely the LOS signal is high level.In order to prevent noise signal to the local interference of the LOS signal of detection, the integrated power to the LOS signal in the present embodiment detects, and can reduce noise signal so effectively to the influence of testing result.
Whether the integrated power of the LOS signal that obtains among the optical module determining step S101 of step S102:REC is greater than first threshold.If then judge the upgoing wave long idle of this REC correspondence, execution in step S103; Otherwise, illustrate that up wavelength has light signal, namely this up wavelength is occupied and be in normal operating conditions, can not select this up wavelength as the up wavelength of other RE.
The optical module of step S103:REC sexually revises the size of bias current or the modulated current of its transmitter according to predetermined frequency period, such as, bias current or modulated current are switched between two preset values, thereby light signal strength or amplitude on its corresponding downstream wavelength of periodically-varied also namely are created in and have modulated the signal that carries out the low frequency amplitude modulation(PAM) on the light signal behind the data-signal.
Described predetermined frequency can be a lower frequency, and as 10KHz, it so just can not influence normal downlink data transmission much smaller than the bandwidth of downlink transfer, guarantees that namely RE can recover data from downstream signal.
The optical module of step S104:REC is received uplink optical signal, and the LOS signal becomes low level, and the optical module of REC arranges the bias current of transmitter according to the normal operating conditions of optical module, and the bias current that makes transmitter is a stationary value.
Step S105: if in a period of time behind the optical module completing steps S104 of REC, the transmission that detects signal on the up wavelength of its correspondence clashes, namely there are a plurality of RE to launch light signal at this up wavelength simultaneously, then the optical module execution in step S103 of REC; Otherwise, if do not detect up wavelength conflict, illustrate that the wavelength autoselect process of the optical module of RE completes successfully.
The RE transmitting uplink data time that described a period of time is at least this REC correspondence adds that this REC arrives the downlink data transmission time of RE farthest, and comprises the data processing time of REC and each RE.
When a plurality of RE select with a pair of upgoing wave length and launch uplink optical signal simultaneously, whether the optical module of REC can increase suddenly by the luminous power that detects reception is judged whether up wavelength clashes, and accordingly within it portion produce the LOS signal, the optical module of REC judges that whether the integrated power of LOS signal is greater than second threshold value, if, then REC restarts the Wavelength Assignment process, namely re-executes step S103.
The method of utilizing present embodiment to provide can realize up wavelength between REC and the RE and the selection of downstream wavelength, and to carry out optical module that wavelength selects all be to support pluggablely, has reduced the change to REC and RE equipment itself.
Embodiment two
Present embodiment provides a kind of wavelength automatic selecting method, and this method can be carried out behind the RE electrifying startup.As shown in Figure 3, this method comprises:
The plug type optical module of step S201:RE selects a downstream wavelength to be configured to the reception wavelength of its adjustable receiver from the Wavelength Assignment table, and select corresponding up wavelength to be configured to the emission wavelength of its adjustable transmitter capable, and adjustable transmitter capable is in power on non-luminous state;
In practice, can dispose the adjustable receiver of plug type optical module of RE and the operation wavelength of adjustable transmitter capable according to last time success wavelength configuration; If configuration for the first time can be selected a pair of wavelength in the Wavelength Assignment table at random, or select first pair of wavelength in the Wavelength Assignment table, as the operation wavelength of adjustable receiver and adjustable transmitter capable.
Whether the plug type optical module of step S202:RE detects light signal on the selected downstream wavelength, if having, and execution in step S203 then, otherwise, execution in step S201.
Whether there is light signal to realize by the level that detects the LOS signal on the selected downstream wavelength of described detection, if the level of LOS signal is high, then do not have light signal on the downstream wavelength, otherwise on the explanation downstream wavelength light signal is arranged.
The pluggable optical module of step S203:RE detects the change frequency of reception signal strength signal intensity indication (RSSI, Received Signal Strength Indicator) signal of receiving optical signals generation.If the change frequency of described RSSI signal is consistent with predetermined change frequency, execution in step S204 then; Otherwise, execution in step S201.
The frequency of the bias current of the pluggable optical module end periodically-varied transmitter that described predetermined change frequency namely is REC.
Wherein RE detects the change frequency of RSSI and can specific implementation be: RE detects crest and the trough of RSSI, and with the difference of crest and trough greater than the frequency of the 3rd threshold value change frequency as RSSI.
The selected downstream wavelength of pluggable optical module preliminary judgement of step S204:RE is idle.Based on the description of moving for the execution of REC one side among the embodiment one, be not difficult to draw, after RE judges that the downstream wavelength of selecting is idle, can think that the up wavelength of this downstream wavelength correspondence also is idle.This moment, but the optical module of RE was in operating state, and RE can begin the mutual of protocol level with REC.
Step S205: if in a period of time T1 behind the optical module completing steps S204 of RE, receive the living information of conflicting of upgoing wave long hair from its selection of indication of its corresponding REC, namely there is other RE also to select same up wavelength to insert this REC, optical module random wait a period of time T2 of RE then, execution in step S201; Otherwise, if do not receive up wavelength conflicting information, the wavelength autoselect process that the optical module of RE is described completes successfully, and the configuration adjustable transmitter capable is normal luminance, and RE utilizes this that the up wavelength of free time and downstream wavelength and REC are carried out two-way communication then.
Described a period of time T1 is at least this RE transmitting uplink data time and adds its corresponding REC to the downlink data transmission time of farthest RE, and comprises the data processing time of REC and each RE.
Described a period of time T2 is a random value, is limited to 0 under it, and its upper limit at least should be greater than T1.
Described up wavelength conflicting information, can be that REC is at the light signal of the specific characteristic that detects the generation of conflict back, being described REC is modulating the signal that the light signal behind the data-signal carries out the low frequency amplitude modulation(PAM), also be RE when receiving luminous power with the light signal of low-frequency cycle property variation; In addition, can also be the information that REC comprises in the CPRI of down direction frame, as the far-end LOS indication information of stipulating in the CPRI agreement.
The method of utilizing present embodiment to provide cooperates the method for embodiment one, can realize the up wavelength of RE and the automatic selection of downstream wavelength, and the optical module of REC and RE all is to support pluggablely, has reduced the change to REC and RE equipment itself.
Embodiment three
Present embodiment and the embodiment one corresponding pluggable optical module that provides among a kind of REC, as shown in Figure 4, the pluggable optical module 300 of this REC comprises: transmitter 301, receiver 302, channel status detection module 303 and bias current arrange module 304.
Wherein, whether channel status detection module 303 judges the integrated power of described LOS signal greater than first threshold for the integrated power of the LOS signal of the up wavelength of measuring this REC correspondence, if, then assert the upgoing wave long idle of this REC correspondence, namely also do not have any RE to insert this REC.When channel status detection module 303 detects the upgoing wave long idle of REC correspondence, to bias current module 304 is set and sends first index signal, make bias current that module 304 is set and periodically switch bias current, be created in and modulated the signal that carries out the low frequency amplitude modulation(PAM) on the light signal behind the data-signal.
When the up wavelength that detects the REC correspondence when channel status detection module 303 has normal light signal, to bias current module 304 is set and sends second index signal, make bias current that module 304 dwelling period switching bias currents are set, keeping bias current is a stationary value.
Bias current arranges module 304 when receiving first index signal, periodically switch the bias current of transmitter 301, make the periodic downlink optical signal intensity that change of transmitter 301, the pluggable optical module of REC passes to RE with this form with the information of downstream wavelength free time; When receiving second index signal, make the bias current of transmitter 301 remain a stationary value.
The function of described channel status detection module 303 also comprises, when its transmission that detects signal on the up wavelength of its correspondence clashes, namely there are a plurality of RE to launch light signal at this up wavelength simultaneously, channel status detection module 303 detects the luminous power increase suddenly of reception and surpasses second threshold value, thereby judge the living conflict of upgoing wave long hair, then to bias current module 304 is set and sends first index signal, make bias current that module 304 is set and periodically switch bias current, be created in and modulated the signal that carries out the low frequency amplitude modulation(PAM) on the light signal behind the data-signal.
Embodiment four
Present embodiment and the embodiment two corresponding pluggable optical modules that provide among a kind of RE, as shown in Figure 5, the pluggable optical module 400 of this RE comprises: adjustable receiver 401, adjustable transmitter capable 402, channel status detection module 403, passage configuration module 404 and memory cell 405.
Wherein, memory cell 405 is used for storage Wavelength Assignment table, selectable, paired up wavelength and the downstream wavelength information of storage in the described Wavelength Assignment table.
Channel status detection module 403 is for detection of the change frequency of the RSSI of the downlink optical signal of described downstream wavelength, and relatively whether this change frequency is consistent with predetermined change frequency, and the frequency of the bias current of the pluggable optical module end periodically-varied transmitter that this predetermined change frequency namely is REC.If it is consistent, then the pluggable optical module of RE is learnt the downstream wavelength free time that this passage configuration module 404 is selected, based on the description of moving for the execution of REC one side among the embodiment one, when the channel status detection module 403 of RE one side detects a downstream wavelength and is the free time, can think that the corresponding up wavelength of this downstream wavelength also is idle.
The function of described channel status detection module 403 also is, after it detects the up wavelength of its selection and downstream wavelength free time in a period of time T1, if receive the living information of conflicting of upgoing wave long hair from its selection of indication of its corresponding REC, random wait a period of time T2 then, notify passage configuration module 404 from the Wavelength Assignment table, to reselect a pair of wavelength then, be configured to the reception wavelength of adjustable receiver 401 and the emission wavelength of adjustable transmitter capable 402 respectively, restart wavelength and select flow process.The description of described a period of time T1 and T2, up wavelength conflicting information is identical with the description among the embodiment two, does not repeat them here.If do not receive up wavelength conflicting information, illustrate that the wavelength autoselect process of the optical module of RE completes successfully.
The function of described passage configuration module 404 comprises that also after the wavelength autoselect process completed successfully, configuration adjustable transmitter capable 402 was normal luminance.RE utilizes this that the up wavelength of free time and downstream wavelength and REC are carried out two-way communication then.
Embodiment five
The method that present embodiment provides a kind of wavelength to select automatically, this method is carried out in REC one side, and as shown in Figure 6, this method comprises:
The pluggable optical module of step S501:REC detects the integrated power of LOS signal of the up wavelength of this REC correspondence;
Whether the integrated power of the LOS signal that obtains among the optical module determining step S501 of step S502:REC greater than first threshold, if then judge the upgoing wave long idle of above-mentioned this REC correspondence, execution in step S503; Otherwise illustrate that up wavelength has light signal, this REC is in normal operating conditions, belongs to prior art, does not launch in the present embodiment.
The pluggable optical module of step S503:REC periodically switches transmission low frequency light signal and normal data-signal in the downstream wavelength of this REC correspondence.
The normal data signal that the optical module of REC will send downwards behind predetermined time interval switches to the special low frequency light signal of certain time length, for example every 1 second with the normal data signal that the sends light signal that to switch to 1 millisecond of long frequency be 42MHz.
In practice, encode maximum 5 companies 0 or connect 1 of 8B10B therefore can n of selection cycle transmission connect 0 or n even 1 (5≤n＜Dalian 0 or even 1 or 160).Suppose that maximum line speed is 2.5Gbps, then the special light signal frequency is 2.5Gbps/ (2n).If n is 30, then the frequency of special light signal is 42MHz.From realizing that can simply adopt the clock crystal oscillator of a 42MHz to realize, the requirement of 30 0 or 1 pair of optical modules simultaneously is also not very very high, general commercial optical module can meet the demands.
The optical module of step S504:REC is received uplink optical signal, and the LOS signal becomes low level, and the optical module of REC sends normal data-signal according to the normal operating conditions of optical module.
Step S505: if in a period of time behind the optical module completing steps S504 of REC, the transmission that detects signal on the up wavelength of its correspondence clashes, namely there are a plurality of RE to launch light signal at this up wavelength simultaneously, detect the luminous power increase suddenly of reception and surpass second threshold value, thereby judge the living conflict of upgoing wave long hair, then the optical module execution in step S503 of REC; Otherwise, if do not detect up wavelength conflict, illustrate that the wavelength autoselect process of the optical module of RE completes successfully.
The RE transmitting uplink data time that described a period of time is at least this REC correspondence adds that this REC arrives the downlink data transmission time of RE farthest, and comprises the data processing time of REC and each RE.
When a plurality of RE select with a pair of upgoing wave length and launch uplink optical signal simultaneously, whether the optical module of REC can increase suddenly by the luminous power that detects reception is judged whether up wavelength clashes, and accordingly within it portion produce the LOS signal, the optical module of REC judges that whether the integrated power of LOS signal is greater than second threshold value, if, then REC restarts the Wavelength Assignment process, namely re-executes step S503.
The method of utilizing present embodiment to provide can be implemented in the selection of the uplink and downlink wavelength between REC and the RE, and to carry out optical module that wavelength selects all be to support pluggablely, has reduced the change to REC and RE equipment itself.
Embodiment six
Present embodiment is corresponding to provide a kind of wavelength automatic selecting method, and this method can be carried out behind the RE electrifying startup.As shown in Figure 7, this method comprises:
The plug type optical module of step S601:RE selects a downstream wavelength to be configured to the reception wavelength of its adjustable receiver from the Wavelength Assignment table, and select corresponding up wavelength to be configured to the emission wavelength of its adjustable transmitter capable, and adjustable transmitter capable is in power on non-luminous state;
In practice, can dispose the adjustable receiver of plug type optical module of RE and the operation wavelength of adjustable transmitter capable according to last time success wavelength configuration; If configuration for the first time can be selected a pair of wavelength in the Wavelength Assignment table at random, or select first pair of wavelength in the Wavelength Assignment table, as the operation wavelength of adjustable receiver and adjustable transmitter capable.
Whether the plug type optical module of step S602:RE detects light signal on the selected downstream wavelength, if having, and execution in step S603 then, otherwise, execution in step S601.
Whether there is light signal to realize by the level that detects the LOS signal on the selected downstream wavelength of described detection, if the level of LOS signal is high, then do not have light signal on the downstream wavelength, otherwise on the explanation downstream wavelength light signal is arranged.
The pluggable optical module of step S603:RE detects whether the low frequency light signal is arranged on the selected downstream wavelength within the predetermined time, and this low frequency light signal is the low frequency light signal that idle REC inserts in the data-signal of its corresponding downstream wavelength.If testing result is for being, execution in step S604 then; Otherwise, execution in step S601.
The optical module of RE can adopt the mode of low-pass filtering to the detection of low frequency light signal, after downstream signal carried out low-pass filtering, surpass a certain threshold value if detect once the intensity of this low frequency signal within the predetermined time, then draw the conclusion of this passage free time, for example, in 2 seconds, detect the light signal of a 42MHz at least, then this downstream wavelength passage free time.
The selected downstream wavelength of pluggable optical module preliminary judgement of step S604:RE is idle.Based on the description of moving for the execution of REC one side among the embodiment five, be not difficult to draw, after RE judges that the downstream wavelength of selecting is idle, can think that the up wavelength of this downstream wavelength correspondence also is idle.This moment, but the optical module of RE was in operating state, and RE can begin the mutual of protocol level with REC.
Step S605: if in a period of time T1 behind the optical module completing steps S604 of RE, receive the living information of conflicting of upgoing wave long hair from its selection of indication of its corresponding REC, namely there is other RE also to select same up wavelength to insert this REC, optical module random wait a period of time T2 of RE then, execution in step S601; Otherwise, if do not receive up wavelength conflicting information, the wavelength autoselect process that the optical module of RE is described completes successfully, and the configuration adjustable transmitter capable is normal luminance, and RE utilizes this that the up wavelength of free time and downstream wavelength and REC are carried out two-way communication then.
Described a period of time T1 is at least this RE transmitting uplink data time and adds its corresponding REC to the downlink data transmission time of farthest RE, and comprises the data processing time of REC and each RE.
Described a period of time T2 is a random value, is limited to 0 under it, and its upper limit at least should be greater than T1.
Described up wavelength conflicting information, can be that REC is at the light signal of the specific characteristic that detects the generation of conflict back, being the signal that the data-signal that sends of described REC and low frequency signal alternately occur, also is the signal that signal signal strength signal intensity behind low pass filter that the optical module of RE receives provides when still surpassing a certain threshold value; In addition, can also be the information that REC comprises in the CPRI of down direction frame, as the far-end LOS indication information of stipulating in the CPRI agreement.
The method of utilizing present embodiment to provide can realize up wavelength between REC and the RE and the selection of downstream wavelength, and to carry out optical module that wavelength selects all be to support pluggablely, has reduced the change to REC and RE equipment itself.
Embodiment seven
Present embodiment and the embodiment five corresponding pluggable optical modules that provide among a kind of REC, as shown in Figure 8, the optical module 700 of this REC comprises: transmitter 701, receiver 702, optical monitoring signal module 703, transmission control module 704, special pattern signal generator 705 and diverter switch 706.
Wherein optical monitoring signal module 703 is for the integrated power of the LOS signal of the up wavelength of this REC correspondence of monitoring, and judge that whether LOS signal share integrated power is greater than first threshold, if, the upgoing wave long idle that then shows this REC correspondence, then this REC does not also insert any RE, and optical monitoring signal module 703 is sent first index signal to sending control module 704 at this moment.When the up wavelength that detects the REC correspondence when optical monitoring signal module 703 has normal light signal, send second index signal to sending control module 704.
Send control module 704 and receive before first index signal, control diverter switch 706 makes the downstream wavelength passage send normal data-signal.Send control module 704 and receive after first index signal, the state of periodically-varied diverter switch 706 makes in the downstream wavelength passage periodically and to switch between the low frequency light signal that the normal data-signal that sends and special pattern signal generator 705 produce.Send control module 704 and receive after second index signal, change the state of diverter switch 706, make the downstream wavelength passage send normal data-signal.
Special pattern signal generator 705 produces low frequency signal, and its signal level characteristics and data-signal are similar.
The state of diverter switch 706 is by sending control module 704 controls.The state of diverter switch 706 has two kinds of operating states: under the situation of connecting special pattern signal generator 705, the low frequency signal that special pattern signal generator 705 produces is exported to the driver (LDD, Laser DiodeDriver) of transmitter 701; Under the situation of connecting data-signal, data-signal is exported to the driver of transmitter 701.
The function of described optical monitoring signal module 703 also comprises, when its transmission that detects signal on the up wavelength of its correspondence clashes, namely there are a plurality of RE to launch light signal at this up wavelength simultaneously, optical monitoring signal module 703 detects the luminous power increase suddenly of reception and surpasses second threshold value, thereby judge the living conflict of upgoing wave long hair, then send first index signal to sending control module 704, make to send the on off state that control module 704 is periodically switched diverter switch 706, produce the mixed signal that data-signal and low frequency signal replace.
The method of utilizing present embodiment to provide can realize up wavelength between REC and the RE and the selection of downstream wavelength, and to carry out optical module that wavelength selects all be to support pluggablely, has reduced the change to REC and RE equipment itself.
Embodiment eight
Present embodiment and the embodiment six corresponding pluggable optical modules that provide among a kind of RE, as shown in Figure 9, the pluggable optical module 800 of this RE comprises: adjustable receiver 801, adjustable transmitter capable 802, channel status detection module 803, passage configuration module 804 and memory cell 805.
Wherein, memory cell 805 is used for storage Wavelength Assignment table, selectable, paired up wavelength and the downstream wavelength information of storage in the described Wavelength Assignment table.
Passage configuration module 804 is used for selecting a downstream wavelength to be configured to the reception wavelength of adjustable receiver 801 from the Wavelength Assignment table, and selects corresponding up wavelength to be configured to the emission wavelength of adjustable transmitter capable 802.After the pluggable optical module of RE has just powered on, channel selecting unit 805 can dispose the reception wavelength of adjustable receiver 801 and the emission wavelength of adjustable transmitter capable 802 according to the successful wavelength configuration of last time, and adjustable transmitter capable 802 is in the not luminance that powers on afterwards.
Channel status detection module 803 is used for the downstream signal that adjustable receiver 801 receives is told one the tunnel, and this downlink optical signal is carried out frequency detecting, when detecting the low frequency light signal, learns the down going channel free time of selection.In the mode that can adopt low-pass filtering to the detection of low frequency light signal, after downstream signal carried out low-pass filtering, surpass a certain threshold value if in a period of time section, detect once the intensity of this low frequency light signal, then draw the conclusion of this passage free time, for example, in 2 seconds, detect the light signal of a 42MHz at least, then this down going channel free time.
The function of described channel status detection module 803 also is, after it detects the up wavelength of its selection and downstream wavelength free time in a period of time T1, if receive the living information of conflicting of upgoing wave long hair from its selection of indication of its corresponding REC, random wait a period of time T2 then, notify passage configuration module 804 from the Wavelength Assignment table, to reselect a pair of wavelength then, be configured to the reception wavelength of adjustable receiver 801 and the emission wavelength of adjustable transmitter capable 802 respectively, restart wavelength and select flow process.The description of described a period of time T1 and T2, up wavelength conflicting information is identical with the description among the embodiment six, does not repeat them here.If do not receive up wavelength conflicting information, illustrate that the wavelength autoselect process of the optical module of RE completes successfully.
The function of described passage configuration module 804 comprises that also after the wavelength autoselect process completed successfully, configuration adjustable transmitter capable 802 was normal luminance.RE utilizes this that the up wavelength of free time and downstream wavelength and REC are carried out two-way communication then.
Embodiment nine
The method that present embodiment provides a kind of wavelength to select automatically, this method can be carried out in REC one side, and as shown in figure 10, this method comprises:
The pluggable optical module of step S901:REC detects the integrated power of LOS signal of the up wavelength of this REC correspondence;
Whether the integrated power of the LOS signal that obtains among the pluggable optical module determining step S901 of step S902:REC greater than first threshold, if then judge the upgoing wave long idle of above-mentioned this REC correspondence, execution in step S903; Otherwise, illustrate that up wavelength has light signal, so this REC is in normal operating conditions, belong to prior art, do not launch in the present embodiment.
The optical module of step S903:REC periodically produces the switch enable signal to transmitter wherein, the downlink optical signal of transmitter after sending remodulates under the driving of above-mentioned periodic switch enable signal.
Send normal data-signal during described switch connection, transmitter was not luminous when switch cut out.Periodically close the downlink optical signal after described switch will produce remodulates, connected switch in 0.5 second again 0.5 second as closed switch every 0.5 second, so repeatedly.
The optical module of step S904:REC is received uplink optical signal, and the LOS signal becomes low level, and the optical module of REC sends normal data-signal according to the normal operating conditions of optical module.
Step S905: if in a period of time behind the optical module completing steps S904 of REC, the transmission that detects signal on the up wavelength of its correspondence clashes, namely there are a plurality of RE to launch light signal at this up wavelength simultaneously, detect the luminous power increase suddenly of reception and surpass second threshold value, thereby judge the living conflict of upgoing wave long hair, then the optical module execution in step S903 of REC; Otherwise, if do not detect up wavelength conflict, illustrate that the wavelength autoselect process of the optical module of RE completes successfully.
The RE transmitting uplink data time that described a period of time is at least this REC correspondence adds that this REC arrives the downlink data transmission time of RE farthest, and comprises the data processing time of REC and each RE.
The method of utilizing present embodiment to provide can be implemented in up wavelength between REC and the RE and the selection of downstream wavelength, and to carry out optical module that wavelength selects all be to support pluggablely, has reduced the change to REC and RE equipment itself.
Embodiment ten
The method that the embodiment of the invention provides a kind of wavelength to select automatically, this method can be carried out behind the RE electrifying startup.As shown in figure 11, this method comprises:
The plug type optical module of step S1001:RE selects a downstream wavelength to be configured to the reception wavelength of its adjustable receiver from the Wavelength Assignment table, and select corresponding up wavelength to be configured to the emission wavelength of its adjustable transmitter capable, and adjustable transmitter capable is in power on non-luminous state;
In practice, can dispose the adjustable receiver of plug type optical module of RE and the operation wavelength of adjustable transmitter capable according to last time success wavelength configuration; If configuration for the first time can be selected a pair of wavelength in the Wavelength Assignment table at random, or select first pair of wavelength in the Wavelength Assignment table, as the operation wavelength of adjustable receiver and adjustable transmitter capable.
Whether the plug type optical module of step S1002:RE detects light signal on the selected downstream wavelength, if having, and execution in step S603 then, otherwise, execution in step S601;
Whether there is light signal to realize by the level that detects the LOS signal on the selected downstream wavelength of described detection, if the level of LOS signal is high, then do not have light signal on the downstream wavelength, otherwise on the explanation downstream wavelength light signal is arranged.
Whether the integrated power of the LOS signal among the pluggable optical module determining step S1002 of step S1003:RE is between minimum and the 5th threshold value.If judged result is when being, execution in step S1004; Otherwise, execution in step S1001.
Owing to when the optical module of REC is closed optical switch, do not have light signal on the downstream wavelength, the LOS signal that produces during the downstream signal of the optical module of RE on detecting downstream wavelength is high level; When the optical module of REC was connected optical switch, the LOS signal that produces during downstream signal on detecting downstream wavelength of downstream wavelength transmitting data signal, the optical module of RE was low level.Because when not having light signal on the downstream wavelength, the LOS signal is high level always.The integrated power of judging this LOS signal as RE then can be judged this downstream wavelength free time between minimum and the 5th threshold value the time, can think that also the up wavelength of this downstream wavelength correspondence also is idle simultaneously.
The selected downstream wavelength of pluggable optical module preliminary judgement of step S1004:RE is idle.Based on the description of moving for the execution of REC one side among the embodiment nine, be not difficult to draw, after RE judges that the downstream wavelength of selecting is idle, can think that the up wavelength of this downstream wavelength correspondence also is idle.This moment, but the optical module of RE was in operating state, and RE can begin the mutual of protocol level with REC.
Step S1005: if in a period of time T1 behind the optical module completing steps S1004 of RE, receive the living information of conflicting of upgoing wave long hair from its selection of indication of its corresponding REC, namely there is other RE also to select same up wavelength to insert this REC, optical module random wait a period of time T2 of RE then, execution in step S1001; Otherwise, if do not receive up wavelength conflicting information, the wavelength autoselect process that the optical module of RE is described completes successfully, and the configuration adjustable transmitter capable is normal luminance, and RE utilizes this that the up wavelength of free time and downstream wavelength and REC are carried out two-way communication then.
Described a period of time T1 is at least this RE transmitting uplink data time and adds its corresponding REC to the downlink data transmission time of farthest RE, and comprises the data processing time of REC and each RE.
Described a period of time T2 is a random value, is limited to 0 under it, and its upper limit at least should be greater than T1.
Described up wavelength conflicting information, can be that REC is at the light signal of the specific characteristic that detects the generation of conflict back, being the remodulates light signal that the on off state of the optical module diverter switch of described REC produces, also is the signal that the integrated power of RE LOS signal when receiving provides between minimum and the 5th threshold value the time; In addition, can also be the information that REC comprises in the CPRI of down direction frame, as the far-end LOS indication information of stipulating in the CPRI agreement.
The method of utilizing present embodiment to provide can realize up wavelength between REC and the RE and the selection of downstream wavelength, and to carry out optical module that wavelength selects all be to support pluggablely, has reduced the change to REC and RE equipment itself.
Embodiment 11
Present embodiment and the embodiment nine corresponding pluggable optical modules that provide among a kind of REC, as shown in figure 12, the pluggable optical module 1100 of this REC comprises: transmitter 1101, receiver 1102, optical monitoring signal module 1103 and transmission control module 1104.
Wherein, optical monitoring signal module 1103 is used for after the optical module of REC powers on, whether monitor the integrated power of LOS signal of up wavelength of this REC correspondence greater than first threshold, if, then assert the upgoing wave long idle of this REC correspondence, namely this REC does not also insert any RE, and optical monitoring signal module 1103 is sent first index signal to sending control module 1104 simultaneously.When the up wavelength that detects the REC correspondence when optical monitoring signal module 1103 has normal light signal, send second index signal to sending control module 1104.
Send control module 1104 and receive before first index signal, make the downstream wavelength passage send normal data-signal.Sending control module 1104 receives after first index signal, the enable signal of periodic switch transmitter 1101, the enable signal of described transmitter 1101 sends normal data-signal when connecting, and transmitter was not luminous when the enable signal of described transmitter 1101 was closed.Periodically close the downlink optical signal after described switch will produce remodulates.Send control module 1104 and receive after second index signal, make transmitter 1101 send normal data-signal at the downstream wavelength passage.
The function of described optical monitoring signal module 1103 also comprises, when its transmission that detects signal on the up wavelength of its correspondence clashes, namely there are a plurality of RE to launch light signal at this up wavelength simultaneously, optical monitoring signal module 1103 detects the luminous power increase suddenly of reception and surpasses second threshold value, thereby judge the living conflict of upgoing wave long hair, then send first index signal to sending control module 1104, make and send the enable signal that control module 1104 is periodically closed transmitter 1101, the downlink optical signal after the generation remodulates.
The method of utilizing present embodiment to provide can realize up wavelength between REC and the RE and the selection of downstream wavelength, and to carry out optical module that wavelength selects all be to support pluggablely, has reduced the change to REC and RE equipment itself.
Embodiment 12
Present embodiment and the embodiment ten corresponding pluggable optical modules that provide among a kind of RE, as shown in figure 13, the pluggable optical module 1200 of this RE comprises: adjustable transmitter capable 1201, adjustable receiver 1202, channel status detection module 1203, passage configuration module 1204 and memory cell 1205.
Wherein, memory cell 1205 is used for storage Wavelength Assignment table, selectable, paired up wavelength and the downstream wavelength information of storage in the described Wavelength Assignment table.
The integrated power of the LOS signal of the downstream signal that channel status detection module 1203 receives for detection of adjustable receiver 1202, and whether the integrated power of judging this LOS signal is greater than minimum and less than the 5th threshold value, if, then judge the downstream wavelength free time of this selection, based on the description of moving for the execution of REC one side among the embodiment nine, when the channel status detection module 1203 of RE one side judges that the downstream wavelength of selecting is idle, also think that the corresponding up wavelength of this downstream wavelength also is idle simultaneously.
The function of described channel status detection module 1203 also is, after it detects the up wavelength of its selection and downstream wavelength free time in a period of time T1, if receive the living information of conflicting of upgoing wave long hair from its selection of indication of its corresponding REC, random wait a period of time T2 then, notify passage configuration module 1204 from the Wavelength Assignment table, to reselect a pair of wavelength then, be configured to the reception wavelength of adjustable receiver 1202 and the emission wavelength of adjustable transmitter capable 1201 respectively, restart wavelength and select flow process.The description of described a period of time T1 and T2, up wavelength conflicting information is identical with the description among the embodiment ten, does not repeat them here.If do not receive up wavelength conflicting information, illustrate that the wavelength autoselect process of the optical module of RE completes successfully.
The function of described passage configuration module 1204 comprises that also after the wavelength autoselect process completed successfully, configuration adjustable transmitter capable 1201 was normal luminance.RE utilizes this that the up wavelength of free time and downstream wavelength and REC are carried out two-way communication then.
REC in the embodiment of the invention and the optical module of RE all are pluggable optical modules, as small form factor pluggable (SFP, Small Form Pluggable) optical module, this will be convenient to the upgrading of existing REC and RE equipment is replaced, and it is just passable only to need to change optical module.
The application scenarios of this patent invention goes for the P2MP framework based on WDM and tunable optical module, as WDM PON.The a pair of transmitter and receiver that can regard REC as the OLT of WDM-PON; RE is regarded as ONU, and up not luminous when not inserting, the method that the optical module of ONU is described according to this patent is finished Wavelength Assignment, inserts OLT.
The concept of each embodiment medium wavelength of the present invention can be amplified the concept of passage, and namely the wavelength automatic selecting method among the embodiment can be used as the automatic selecting method of passage.Described passage not only comprises wavelength channel, also comprises sign indicating number subchannel in time slot passage in the time division multiplex system, the channel of polarization in the polarisation multiplex system, the carrier frequency passage in the Frequency Division Multiplexing system, the code-division multiplexing system etc.Corresponding Wavelength Assignment table also can be amplified the concept of channel allocation table, selectable, paired down going channel and the corresponding data feedback channel of storage in the channel allocation table.
The above only is preferred implementation 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 improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (14)
1. the method that wavelength is selected automatically is characterized in that, comprising:
Carry out input to determine whether described up wavelength is idle at up wavelength;
When determining described upgoing wave long idle, downstream wavelength in correspondence sends the light signal with default signal specific feature, to notify the described downstream wavelength free time of remote equipment and to make described remote equipment carry out wavelength configuration according to the up-downgoing wavelength corresponding with described downstream wavelength;
Receive the upstream data light signal that is sent by described remote equipment at described up wavelength, and send the downlink data light signal in described downstream wavelength;
Wherein, describedly carry out input to determine whether idle step comprises described up wavelength at up wavelength:
Detect the integrated power of its corresponding dropout LOS signal at up wavelength;
Whether the integrated power of judging detected LOS signal surpasses first threshold;
If surpass first threshold, then determine described upgoing wave long idle.
2. method according to claim 1 is characterized in that, the step that described downstream wavelength in correspondence sends the light signal with signal specific feature comprises:
According to the light signal strength on the described downstream wavelength of predetermined change frequency periodically-varied, and at the described light signal with cyclic variation intensity of described downstream wavelength transmission; Perhaps,
Switching according to predetermined frequency period sends low frequency light signal and normal data-signal, and sends the light signal that described periodicity hand-off process obtains in described downstream wavelength; Perhaps,
Transmission according to predetermined frequency period switch transmitter enables the TX_Enable signal, obtaining the light signal of discontinuity, and sends the light signal of described discontinuity in described downstream wavelength.
3. according to each described method in the claim 1 to 2, it is characterized in that, also comprise:
In the process of carrying out the transmission of data light signal, detect described up wavelength whether signal conflict takes place;
If detect in Preset Time at described up wavelength signal conflict does not take place, wavelength is selected to finish automatically.
4. method according to claim 3 is characterized in that, the step whether up wavelength of described detection signal conflict takes place comprises: detect the luminous power that receives at described up wavelength and second threshold value whether occurs increasing suddenly and surpassing; If then judge at up wavelength signal conflict take place.
5. method according to claim 4 is characterized in that, when judging the generation signal conflict, produces and also sends the LOS signal, and restart wavelength and select.
6. the method that wavelength is selected automatically is characterized in that, comprising:
From the Wavelength Assignment table, select a pair of up-downgoing wavelength and carry out wavelength pre-configured;
Whether whether detection receives the light signal with default signal specific feature in selected downstream wavelength, idle to judge described downstream wavelength;
Judging described downstream wavelength during the free time, selected up-downgoing wavelength is being configured to corresponding emission wavelength respectively and receives wavelength, and carry out emission and the reception of up-downgoing data-signal at described up-downgoing wavelength.
7. method according to claim 6 is characterized in that, also comprises:
Judging described downstream wavelength when busy, wait for after the Preset Time, in described Wavelength Assignment table, reselect a pair of up-downgoing wavelength, and the pre-configured and wavelength idle-detection of wavelength again.
8. method according to claim 7 is characterized in that, described Preset Time is at least the transmitting uplink data time and adds corresponding maximum downstream data transmission period, and comprises the data processing time of local side and terminal.
9. according to each described method in the claim 6 to 8, it is characterized in that described detection comprises in the step whether selected downstream wavelength receives the light signal with default signal specific feature:
The intensity instruction signal of the light signal correspondence that detection receives in described downstream wavelength, and when described intensity instruction signal indicates the intensity of described light signal to be periodically-varied, judge the described downstream wavelength free time; Perhaps,
The light signal that receives in described downstream wavelength is carried out low-pass filtering, the light signal after the low-pass filtering is detected to judge whether described light signal comprises default low frequency light signal, if judge the described downstream wavelength free time; Perhaps
Whether detection is the light signal of discontinuity at the light signal that described downstream wavelength receives, if judge the described downstream wavelength free time; Perhaps;
Detect the integrated power of the dropout LOS signal on the described downstream wavelength, if described integrated power is then judged the described downstream wavelength free time greater than 0 and less than a default thresholding.
10. an optical module is characterized in that, comprising: transmitter, receiver, channel status detection module; Wherein,
Described receiver is used for receiving uplink optical signal at up wavelength;
The channel status detection module is used for that the light signal that described receiver receives is carried out wavelength and detects to confirm whether described up wavelength is idle;
Described transmitter, be used for when definite described upgoing wave long idle, downstream wavelength in correspondence sends the light signal with default signal specific feature, to notify the described downstream wavelength free time of remote equipment and to make described remote equipment carry out wavelength configuration according to the up-downgoing wavelength corresponding with described downstream wavelength;
Wherein, described channel status detection module detects and confirms whether idle mode is described up wavelength:
Detect the integrated power of its corresponding dropout LOS signal at up wavelength;
Whether the integrated power of judging detected LOS signal surpasses first threshold;
If surpass first threshold, then determine described upgoing wave long idle.
11. optical module as claimed in claim 10 is characterized in that, also comprises:
Bias current arranges module, be used for to receive the index signal that sends when described channel status detection module is confirmed described upgoing wave long idle, and according to the bias current of the described transmitter of described index signal periodically-varied or the size of modulated current, so that the light signal that the emission of described transmitter has cyclic variation intensity; Perhaps,
Handover module is used for periodic low frequency light signal and the normal data-signal of switching, so that described transmitter sends the light signal that described periodicity hand-off process obtains in described downstream wavelength;
Send control module, the transmission that is used for the periodic switch transmitter enables the TX_Enable signal, so that described transmitter sends the light signal of discontinuity in described downstream wavelength.
12. an optical module is characterized in that, comprises receiver, transmitter, channel status detection module, passage configuration module and memory cell; Wherein,
Described memory cell is used for storing the Wavelength Assignment table in advance, and described Wavelength Assignment table comprises many to alternative up-downgoing wavelength;
Described passage configuration module, wavelength is pre-configured for carrying out from a pair of up-downgoing wavelength of above-mentioned Wavelength Assignment table selection, and is judging described downstream wavelength is configured to selected up-downgoing wavelength respectively correspondence during the free time emission wavelength and emission and the reception of reception wavelength to carry out the up-downgoing data-signal;
Described channel status detection module, for detection of on selected downstream wavelength, whether receiving the light signal with default signal specific feature, whether idle to judge described downstream wavelength.
13. optical module according to claim 12, it is characterized in that described light signal with default signal specific feature comprises: have the light signal, low frequency light signal of cyclic variation intensity and light signal that normal data-signal periodically switches or the light signal of discontinuity.
14. optical module according to claim 13 is characterized in that,
When the light signal of described default signal specific feature is when having the light signal of cyclic variation intensity, the intensity instruction signal to the light signal correspondence that receives in described downstream wavelength of specifically being used for described channel status detection module detects when determining that its described intensity instruction signal indicates the intensity of described light signal to be periodically-varied, judges the described downstream wavelength free time; Perhaps
When the light signal of described default signal specific feature be low frequency light signal and normal data-signal periodically switch light signal the time, described channel status detection module specifically is used for the light signal that receives in described downstream wavelength is carried out low-pass filtering, light signal after the low-pass filtering is detected to judge whether described light signal comprises default low frequency light signal, if judge the described downstream wavelength free time; Perhaps
When the light signal of described default signal specific feature is the light signal of discontinuity, whether described channel status detection module is the light signal of discontinuity for detection of the light signal that receives in described downstream wavelength specifically, if judge the described downstream wavelength free time.
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2012385350B2 (en) | 2012-07-13 | 2016-02-04 | Huawei Technologies Co., Ltd. | Wavelength negotiation method and apparatus of multi-wavelength passive optical network, and multi-wavelength passive optical network system |
| CN103916192B (en) * | 2012-12-31 | 2016-08-03 | 上海贝尔股份有限公司 | Optical network unit, optical line terminal group and optical-fiber network framework |
| CN103973389B (en) * | 2013-02-06 | 2017-05-24 | 上海贝尔股份有限公司 | Method for automatically configuring wavelength of optical network units |
| CN104811238B (en) * | 2014-01-28 | 2019-05-07 | 中兴通讯股份有限公司 | The timely partial wave division multiplexing system of passageway switching method, device, optical network unit |
| CN107079204B (en) * | 2014-11-05 | 2020-08-07 | 华为技术有限公司 | Optical interface auto-negotiation method, optical module, local side equipment and terminal equipment |
| CN104954898B (en) * | 2015-06-01 | 2019-01-01 | 桂林 | A kind of TWDM-PON structure, equipment and the control method of ring sub-network extension |
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| CN110519666B (en) * | 2019-08-16 | 2022-04-01 | 青岛海信宽带多媒体技术有限公司 | Optical module wavelength configuration method and device and optical module |
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| CN115065437B (en) * | 2022-05-12 | 2023-02-14 | 武汉联特科技股份有限公司 | Tunable optical module and method and system for automatically configuring wavelength of tunable optical module |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1362806A (en) * | 2002-01-24 | 2002-08-07 | 北京邮电大学 | Routing and wavelength distributing method for optical wavelength division multiplexing network |
| CN101222279A (en) * | 2007-01-09 | 2008-07-16 | 日立通讯技术株式会社 | Passive optical network system and wavelength assignment method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4499576B2 (en) * | 2005-01-17 | 2010-07-07 | 日本電信電話株式会社 | Optical wavelength division multiplexing system, optical termination device and optical network unit |
-
2009
- 2009-12-22 CN CN2009102543641A patent/CN102104812B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1362806A (en) * | 2002-01-24 | 2002-08-07 | 北京邮电大学 | Routing and wavelength distributing method for optical wavelength division multiplexing network |
| CN101222279A (en) * | 2007-01-09 | 2008-07-16 | 日立通讯技术株式会社 | Passive optical network system and wavelength assignment method |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2006-197489A 2006.07.27 |
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