CN100426899C - Apparatus and method for regulating interface transmission rate of transmission device - Google Patents
Apparatus and method for regulating interface transmission rate of transmission device Download PDFInfo
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- CN100426899C CN100426899C CNB2005101028452A CN200510102845A CN100426899C CN 100426899 C CN100426899 C CN 100426899C CN B2005101028452 A CNB2005101028452 A CN B2005101028452A CN 200510102845 A CN200510102845 A CN 200510102845A CN 100426899 C CN100426899 C CN 100426899C
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Abstract
The present invention discloses a device for regulating the interface transmission speed rate of a transmission device, which comprises a control unit, a frequency adjusting unit and a transmission device. The present invention also provides a method for regulating the interface transmission speed rate of the transmission device. When service data speed rate changes and does not meet the matching relationship with the interface transmission speed rate, the device and method of the present invention determines a novel interface transmission speed rate matching with the service data speed rate and a new input clock frequency of the transmission device, and the novel input clock frequency of the transmission device corresponds to the interface transmission speed rate; a frequency regulating unit generates a clock signal of which the frequency is equal to the new input clock frequency, the clock signal is output to the transmission device and used as the input clock frequency of the transmission device, and thus, the regulation of the interface transmission speed rate of the transmission device is achieved. Besides, the generation of the situation that data transmission between a baseband processing unit and a radio frequency processing unit fails is avoided.
Description
Technical field
The present invention relates to field of data transmission, be specifically related to a kind of device and method of adjusting interface transmission rate of transmission device.
Background technology
The development of modern base station design, trend towards baseband processing unit and RF processing unit in physics realization separately, independent development, the interface between them can define by standard agreement, also can be self-defined by manufacturer.
The data type of transmitting between baseband processing unit and RF processing unit has three kinds usually: business datum, synchrodata, operation/safeguard (C﹠amp; M) data.Wherein, business datum accounts for the overwhelming majority.
Various types of data is transmitted between baseband processing unit and RF processing unit by special transmission apparatus.When the transfer of data that realizes between baseband processing unit and RF processing unit, existing method realizes according to agreement fully.To be primarily aimed at Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wideband Code DivisionMultiple Address) common public radio interface (CPRI of system, Common Public RadioInterface) agreement is an example, its specified in more detail between baseband processing unit and RF processing unit transmitting synchronous data, C﹠amp; The method of M data and business datum, for example: the interface transmission rate of regulation transmission apparatus is 614.4Mbps or 1.2288Gbps or 2.4576Gbps, traffic data rate is 3.84*160Mbps or 3.84*320Mbps or 3.84*640Mbps.Simultaneously, the CPRI agreement has been stipulated the matching relationship of traffic data rate and interface transmission rate, and corresponding with it transmission frame format has also been provided clear and definite and detailed regulation.
But in fact, for some base station system, its traffic data rate normally various, variable, several speed that are not limited only to stipulate in the agreement like this, also may not only be confined to several speed of stipulating in the agreement with the interface transmission rate of traffic data rate coupling, at this moment, transmission apparatus in some cases, just possibly can't be realized the transfer of data between baseband processing unit and RF processing unit so if only support certain standard interface transmission rate.Equally, suppose under certain traffic data rate, transmission apparatus has been realized transmission with certain interface transmission rate with its coupling, change has taken place in traffic data rate subsequently, and requirement will be worked as the front port transmission rate and be changed into interface transmission rate with the current business data rate, it is fixed that but in a single day the interface transmission rate of existing transmission apparatus determines that the back just can't change, and will cause the data transmission fails between baseband processing unit and RF processing unit like this.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of device and method of adjusting interface transmission rate of transmission device, to change in traffic data rate and when not satisfying matching relationship with the interface transmission rate, to realize the adjustment of interface transmission rate of transmission device.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of device of adjusting interface transmission rate of transmission device, interface transmission rate become the fixed proportion relation with the input clock frequency of transmission apparatus, this device comprises: control unit, frequency adjustment unit and transmission apparatus, wherein,
Control unit, be used for change having taken place detecting traffic data rate, and during the matching relationship of and traffic data rate satisfied when the front port transmission rate, matching relationship according to traffic data rate and interface transmission rate, in the speed range that transmission apparatus is supported, select arbitrarily a new interface transmission rate with the current business data rate, and definite transmission apparatus new input clock frequency corresponding with this new interface transmission rate; Be used to obtain the input reference frequency of frequency adjustment unit, calculate the ratio of this new input clock frequency and this input reference frequency, and this ratio is sent to the frequency adjustment unit;
The frequency adjustment unit, be used for the ratio that sends according to control unit and self input reference frequency, the frequency of self clock signal is adjusted on the new input clock frequency of transmission apparatus, should be outputed to transmission apparatus through the adjusted clock signal of frequency then;
Transmission apparatus is used for the frequency of the clock signal of the frequency adjustment unit output input clock frequency as self.
Described device is applied in the base band side, and described device further comprises: baseband processing unit is used for the current business data rate is sent to control unit;
Described control unit is further used for, and receives the traffic data rate that baseband processing unit sends.
Described device is applied in radio frequency side, and described device further comprises: RF processing unit, be used for the new interface transmission rate, and perhaps new interface transmission rate and the speed adjustment period sends to control unit;
Described control unit is further used for, the new interface transmission rate that the received RF processing unit sends, and perhaps new interface transmission rate and speed are adjusted the period.
Described device further is applied in the base band side, and the device of base band side is further used for the new interface transmission rate, and perhaps new interface transmission rate and speed are adjusted the transmission apparatus that the period sends to radio frequency side;
The transmission apparatus of described radio frequency side is further used for new interface transmission rate that base band side device is sent, and perhaps new interface transmission rate and speed are adjusted the period and sent to RF processing unit.
Described base band side device further comprises: baseband processing unit, be used for new interface transmission rate that base band side control unit is sent, and perhaps new interface transmission rate and speed are adjusted the period and are sent to base band side transmission apparatus;
Described base band side control unit is further used for, and with the new interface transmission rate, perhaps new interface transmission rate and the speed adjustment period sends to baseband processing unit;
The transmission apparatus of described base band side is further used for, and with the new interface transmission rate that baseband processing unit sends, perhaps new interface transmission rate and speed are adjusted the transmission apparatus that the period sends to radio frequency side.
Described frequency adjustment unit further comprises: stabilized frequency output unit and adjustment unit, wherein,
The stabilized frequency output unit is used for the clock signal of a frequency stabilization is outputed to adjustment unit;
Adjustment unit, be used for frequency with the clock signal of stabilized frequency output unit output as self input reference frequency, and after receiving the ratio that control unit sends, according to this ratio and self input reference frequency, adjust the frequency of self clock signal, and should output to transmission apparatus through the adjusted clock signal of frequency.
Described stabilized frequency output unit is a constant-temperature crystal oscillator.
Described stabilized frequency output unit is VCXO phase-locked loop or temperature compensating crystal oscillator phase-locked loop,
Described stabilized frequency output unit is further used for, and receives the ratio of control unit output and the clock signal of transmission apparatus output, and according to the output clock frequency of this ratio and transmission apparatus clock signal correspondence, adjusts the frequency of self clock signal,
Described control unit is further used for, and calculates the ratio of frequency and the output clock frequency of the transmission apparatus that gets access to of the clock signal of the stabilized frequency output unit get access to, and this ratio is sent to the stabilized frequency output unit.
Described adjustment unit is the voltage controlled oscillator phase-locked loop.
A kind of method of adjusting interface transmission rate of transmission device, interface transmission rate become the fixed proportion relation with the input clock frequency of transmission apparatus, this method comprises:
A, detect traffic data rate change has taken place, and after front port transmission rate and traffic data rate do not satisfy matching relationship, matching relationship according to interface transmission rate and traffic data rate, in the speed range that transmission apparatus is supported, select a new interface transmission rate with the current business data rate arbitrarily;
B, determine the new input clock frequency that transmission apparatus is corresponding with the new interface transmission rate;
C, according to should be new the clock signal of input clock frequency generation corresponding frequencies, then this clock signal is sent to transmission apparatus, after transmission apparatus is received this clock signal, with the frequency of this clock signal input clock frequency as self.
Preestablish a default interface transmission rate, further comprise before the described steps A:
Determine the initial input clock frequency corresponding with this default interface transmission rate; Generate the clock signal of corresponding frequencies according to the initial input clock frequency, then this clock signal is sent to transmission apparatus, after transmission apparatus is received this clock signal, the frequency of this clock signal initial input clock frequency as self.
Compared with prior art, apparatus and method provided by the present invention change in traffic data rate, and during the matching relationship of satisfied and interface transmission rate, by the new interface transmission rate of determining to mate with traffic data rate, determine the transmission apparatus new input clock frequency corresponding then with this new interface transmission rate, and produce the clock signal that a frequency equals the new input clock frequency of transmission apparatus by the frequency adjustment unit, then this clock signal is exported to transmission apparatus, with input clock frequency as transmission apparatus, realize the adjustment of interface transmission rate of transmission device, thereby avoided the generation of data transmission fails situation between baseband processing unit and RF processing unit.
Description of drawings
Fig. 1 is the device block diagram of adjustment interface transmission rate of transmission device provided by the invention;
Fig. 2 is the device block diagram of the specific embodiment of adjustment base band side transmission apparatus provided by the invention and radio frequency side interface transmission rate of transmission device;
Fig. 3 is the flow chart of adjustment interface transmission rate of transmission device provided by the invention;
Fig. 4 is the flow chart of the specific embodiment of adjustment base band side interface transmission rate of transmission device provided by the invention;
Fig. 5 is the flow chart of the specific embodiment of adjustment radio frequency side interface transmission rate of transmission device provided by the invention.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Fig. 1 is the device block diagram of adjustment interface transmission rate of transmission device provided by the invention, and as shown in Figure 1, it mainly comprises:
Control unit 11: be used for determining new interface transmission rate, and the new input clock frequency corresponding with this new interface transmission rate of definite transmission apparatus 13; Be used to calculate the ratio of this new input clock frequency and the input reference frequency of the frequency adjustment unit 12 that gets access to, and this ratio is sent to frequency adjustment unit 12.
The interface transmission rate must satisfy the matching relationship with traffic data rate.This matching relationship both can be followed the CPRI agreement, it also can be other matching relationship that to realize transfer of data between baseband processing unit and the RF processing unit, if in the speed range that transmission apparatus is supported, a plurality of speed and current business data rate are arranged, can choose the new interface transmission rate that a conduct will be adjusted to therein wantonly so.
The proportionate relationship that the input clock frequency of interface transmission rate and transmission apparatus becomes to fix, the i.e. parallel bit wide of the input clock frequency * transmission apparatus of interface transmission rate=transmission apparatus.
Frequency adjustment unit 12: be used to receive the ratio that control unit 11 sends, according to this ratio and self input reference frequency, the frequency of self clock signal is adjusted on the new input clock frequency of transmission apparatus, should be outputed to transmission apparatus 13 through the adjusted clock signal of frequency then.
Further, frequency adjustment unit 12 can comprise: stabilized frequency output unit 121 and adjustment unit 122, wherein,
Stabilized frequency output unit 121: be used for the clock signal of a frequency stabilization is outputed to adjustment unit 122;
Adjustment unit 122: be used for frequency with stabilized frequency output unit 121 clock signals as self input reference frequency, and the ratio that sends according to the control unit of receiving 11 and self input reference frequency, the frequency of self clock signal is adjusted on the new input clock frequency of transmission apparatus 13, should be outputed to transmission apparatus 13 through the adjusted clock signal of frequency then.
Transmission apparatus 13: be used for the clock signal of receive frequency adjustment unit 12 output, and with the frequency of this clock signal input clock frequency as self.
Fig. 2 is the device block diagram of specific embodiment of the interface transmission rate of adjustment base band side transmission apparatus provided by the invention and radio frequency side transmission apparatus, as shown in Figure 2,
The base band side mainly comprises:
Control unit 1-11: be used for detecting traffic data rate that baseband processing unit 1-14 sends with when the front port transmission rate does not satisfy matching relationship, matching relationship according to traffic data rate and traffic data rate and interface transmission rate, determine new interface transmission rate, this new interface transmission rate and speed adjustment period are sent to baseband processing unit 1-14; Be used for determining the new input clock frequency corresponding of transmission apparatus 1-13, and calculate the ratio of the system clock frequency of this new input clock frequency and self preservation, this ratio is sent to adjustment unit 1-122 with this new interface transmission rate.
When initially powering on, the transmission apparatus of base band side is operated on the interface transmission rate of acquiescence, at this moment, control unit 1-11 is according to the default interface transmission rate of self preserving, calculate the initial input clock frequency of transmission apparatus 1-13 correspondence, and calculate the ratio of this initial input clock frequency and system clock frequency, this ratio is sent to adjustment unit 1-122, adjustment unit 1-122 is according to the ratio that receives then, the frequency of self clock signal is adjusted on the initial input clock frequency, should output to transmission apparatus 1-13 through the adjusted clock signal of frequency then, after transmission apparatus 1-13 receives this clock signal, with the frequency of this clock signal initial input clock frequency as self.
System clock frequency output unit 1-121: be used for the clock signal of system of a frequency stabilization is outputed to adjustment unit 1-122.
In the base band side, system clock frequency output unit 1-121 must be able to export a clock signal that frequency is highly stable, and the frequency of this clock signal is as system clock frequency, so that the transmission apparatus of base band side normally transceive data and signal.For example: system clock frequency output unit 1-121 can be a constant-temperature crystal oscillator (OCXO) etc.
Adjustment unit 1-122: the clock signal of system that is used for receiving system clock frequency output unit 1-121 output, with the system clock frequency of this clock signal correspondence input reference frequency as self, and after receiving the ratio that control unit 1-11 sends, according to this ratio and the input reference frequency of self, adjust the frequency of self clock signal, and should output to transmission apparatus 1-13 through the adjusted clock signal of frequency.
The characteristics of adjustment unit 1-122 are: the frequency range of clock signal is bigger, therefore utilizes this unit to adjust the input clock frequency of transmission apparatus, can make the input clock frequency of transmission apparatus change in a bigger scope.For example: adjustment unit 1-122 can be a voltage controlled oscillator phase-locked loop (VCO PLL) etc.
Transmission apparatus 1-13: be used for after receiving the clock signal of adjustment unit 1-122 output, with the frequency of this clock signal input clock frequency as self; New interface transmission rate that the baseband processing unit 1-14 that is used for receiving sends and speed are adjusted the transmission apparatus 2-13 that the period sends to radio frequency side.
Baseband processing unit 1-14: be used for the current business data rate is sent to control unit 1-11, be used to receive new interface transmission rate and the speed adjustment period that control unit 1-11 sends, and this new interface transmission rate and speed adjustment period are sent to transmission apparatus 1-13.
As can be seen, system clock frequency output unit 1-121 is stabilized frequency output unit 121 shown in Figure 1.
In actual applications, the control unit 1-11 of base band side is after having determined the interface transmission rate, can determine a speed adjustment period simultaneously, so that base band side and radio frequency side are finished the adjustment of the interface transmission rate of transmission apparatus separately simultaneously in this speed is adjusted the period.
Radio frequency side mainly comprises:
RF processing unit 2-14: be used for after receiving that new interface transmission rate that transmission apparatus 2-13 sends and speed are adjusted the period, this new interface transmission rate and speed adjusted the period send to control unit 2-11.
Control unit 2-11: be used for new interface transmission rate and speed adjustment period that received RF processing unit 2-14 sends, and after speed is adjusted the period arrival, determine the new input clock frequency corresponding of transmission apparatus 2-13 with this new interface transmission rate, calculate the ratio of the frequency of this new input clock frequency and stabilized frequency output unit 2-121 clock signal simultaneously, this ratio is outputed to adjustment unit 2-122, the ratio of the new output clock frequency of the frequency of calculation stability frequency output unit 2-121 clock signal and transmission apparatus outputs to stabilized frequency output unit 2-121 with this ratio then.
Because the frequency of the input clock signal of stabilized frequency output unit 2-121 equals the output clock frequency of transmission apparatus 2-13, therefore control unit 2-11 can be according to the input clock frequency of current transmission apparatus 2-13, and the input clock frequency of transmission apparatus and the fixed proportion relation of exporting clock frequency, calculate the output clock frequency of transmission apparatus, and, calculate the frequency of the current clock signal of stabilized frequency output unit 2-121 in conjunction with the last ratio of self exporting to stabilized frequency output unit 2-121.
When initially powering on, the transmission apparatus of radio frequency side is operated on the interface transmission rate of acquiescence, at this moment, control unit 2-11 is according to the default interface transmission rate, calculate the initial input clock frequency of transmission apparatus 2-13 correspondence, and calculate the ratio of the frequency of this initial input clock frequency and stabilized frequency output unit 2-121 clock signal, this ratio is sent to adjustment unit 2-122; Adjustment unit 2-122 is according to the ratio that receives and the frequency of stabilized frequency output unit 2-121 clock signal, the frequency of self clock signal is adjusted on the initial input clock frequency, should be outputed to transmission apparatus 2-13 through the adjusted clock signal of frequency then; After transmission apparatus 2-13 receives this clock signal, with the frequency of this clock signal input clock frequency, simultaneously to clock signal of stabilized frequency output unit 2-121 output as self; Stabilized frequency output unit 2-121 is with the output clock frequency of the transmission apparatus 2-13 clock signal correspondence that the receives frequency as self input clock signal.
Adjustment unit 2-122: the clock signal that is used to receive stabilized frequency output unit 2-121 output, with the frequency of this clock signal input reference frequency as self, behind the ratio of receiving control unit 2-11 output, according to this ratio and the input reference frequency of self, the frequency of self clock signal is adjusted on the new input clock frequency of transmission apparatus, should be outputed to transmission apparatus 2-13 through the adjusted clock signal of frequency then.
Adjustment unit 2-122 can be VCO PLL etc.
Stabilized frequency output unit 2-121: be used for after the clock signal of receiving transmission apparatus 2-13 output, with the frequency lock of self input clock signal on the output clock frequency of the transmission apparatus of this clock signal correspondence, and behind the ratio of receiving control unit 2-11 output, frequency according to this ratio and self input clock signal, adjust the frequency of self clock signal, should output to adjustment unit 2-122 through the adjusted clock signal of frequency then.
The characteristics of stabilized frequency output unit 2-121 are: the fluctuation range of the frequency of clock signal is very little.Therefore, with the input reference frequency of this frequency as adjustment unit 2-122, can make that the fluctuation range of frequency of adjustment unit 2-122 clock signal is also very little, frequency requirement when satisfying radio frequency side transmission apparatus operate as normal, thus radio frequency side transmission apparatus normally transceive data and signal made.
Stabilized frequency output unit 2-121 can be VCXO phase-locked loop (VCXO PLL) or temperature compensating crystal oscillator phase-locked loop (TCXO PLL) etc.
Transmission apparatus 2-13: be used for after receiving the clock signal of adjustment unit 2-122 output, with the frequency of this clock signal input clock frequency, simultaneously to clock signal of stabilized frequency output unit 2-121 output as self; Be used for after receiving that new interface transmission rate that base band side transmission apparatus 1-13 sends and speed are adjusted the period, this new interface transmission rate and speed adjusted the period send to RF processing unit 2-14.
Fig. 3 is the flow chart of the interface transmission rate of adjustment transmission apparatus provided by the invention, and as shown in Figure 3, its concrete steps are as follows:
Step 301:,, determine new interface transmission rate according to the matching relationship of traffic data rate and interface transmission rate when front port transmission rate and traffic data rate do not satisfy matching relationship.
Step 302: determine the new input clock frequency that transmission apparatus is corresponding with this new interface transmission rate.
Step 303: generate the clock signal of corresponding frequencies according to this new input clock frequency, the clock signal with this frequency sends to transmission apparatus then, after transmission apparatus is received this clock signal, with the frequency of this clock signal input clock frequency as self.
Fig. 4 is the flow chart of the specific embodiment of adjustment base band side interface transmission rate of transmission device provided by the invention, present embodiment is applied in and comprises: the base band side of control unit, system clock frequency output unit, adjustment unit and transmission apparatus, as shown in Figure 4, its concrete steps are as follows:
Step 401: control unit detects traffic data rate change has taken place, and matching relationship satisfied when the front port transmission rate and traffic data rate, determine new interface transmission rate according to the matching relationship of traffic data rate and interface transmission rate then, determine a speed adjustment period simultaneously.
Step 402: control unit detects speed and adjusts the period and arrive, according to the fixed proportion relation of the input clock frequency of interface transmission rate and transmission apparatus, the calculating transmission apparatus new input clock frequency corresponding with the new interface transmission rate.
Step 403: control unit calculates the ratio of this new input clock frequency and system clock frequency, then this ratio is sent to the adjustment unit that input reference frequency is a system clock frequency.
Step 404: after adjustment unit is received this ratio, system clock frequency according to this ratio and system clock frequency output unit clock signal correspondence, adjust the frequency of self clock signal, and should output to transmission apparatus through the adjusted clock signal of frequency.
The frequency of the clock signal of adjustment unit becomes the variable proportion relation with input reference frequency, at input reference frequency one regularly, by changing ratio, clock signal is locked on the different frequencies.
Step 405: after transmission apparatus is received the clock signal of adjustment unit output, with the frequency of this clock signal input clock frequency as self.
Fig. 5 is the flow chart of the specific embodiment of adjustment radio frequency side interface transmission rate of transmission device provided by the invention, present embodiment is applied in and comprises: the radio frequency side of RF processing unit, control unit, stabilized frequency output unit, adjustment unit and transmission apparatus, as shown in Figure 5, its concrete steps are as follows:
Step 501: control unit is received new interface transmission rate and the speed adjustment period that RF processing unit sends.
The control unit of base band side is after determining that new interface transmission rate and speed are adjusted the period, this new interface transmission rate and speed are adjusted the period by baseband processing unit, the transmission apparatus of base band side and the transmission apparatus and the RF processing unit of radio frequency side, send to the control unit of radio frequency side.
Step 502: control unit detects speed and adjusts the period arrival, calculates the transmission apparatus new input clock frequency corresponding with this new interface transmission rate.
Step 503: control unit calculates the ratio of frequency of the clock signal of this new input clock frequency and current stabilized frequency output unit, and this ratio is sent to adjustment unit; The frequency of calculation stability frequency output unit clock signal and the transmission apparatus ratio of newly exporting clock frequency simultaneously, and this ratio sent to the stabilized frequency output unit.
The output clock frequency of transmission apparatus clock signal correspondence becomes the fixed proportion relation with the input clock frequency of transmission apparatus, control unit can calculate the new output clock frequency of transmission apparatus according to the new input clock frequency of this proportionate relationship and transmission apparatus.
Step 504: input reference frequency equals the adjustment unit of clock signal frequency of stabilized frequency output unit according to the ratio that receives and the input reference frequency of self, the frequency of self clock signal is adjusted on the new input clock frequency of the transmission apparatus in the step 502, should be outputed to transmission apparatus through the adjusted clock signal of frequency then.
Step 505: after transmission apparatus is received the clock signal of adjustment unit output, with the frequency of this clock signal input clock frequency as self, and to clock signal of stabilized frequency output unit output.
Step 506: the stabilized frequency output unit is behind the ratio of the clock signal of receiving transmission apparatus output and control unit transmission, output clock frequency according to this ratio and transmission apparatus clock signal correspondence, adjust the frequency of self clock signal, should output to adjustment unit through the adjusted clock signal of frequency.
Equally, the transmission apparatus of base band side and radio frequency side is operated on the predefined default interface transmission rate when initially powering on, and detailed process is as follows:
For the base band side: control unit calculates the transmission apparatus initial input clock frequency corresponding with the default interface clock frequency, and calculates the ratio of this initial input clock frequency and system clock frequency, then this ratio is sent to adjustment unit; Adjustment unit is according to this ratio and self input reference frequency promptly: system clock frequency, the frequency of self clock signal is adjusted on the initial input clock frequency of transmission apparatus, then to clock signal of transmission apparatus output; After transmission apparatus is received this clock signal, with the frequency of this clock signal initial input clock frequency as self.
For radio frequency side: control unit calculates the transmission apparatus initial input clock frequency corresponding with the default interface clock frequency, and calculate the ratio of the frequency of this initial input clock frequency and stabilized frequency output unit clock signal, then this ratio is sent to adjustment unit; Adjustment unit is according to this ratio and self input reference frequency promptly: the frequency of stabilized frequency output unit clock signal, the frequency of self clock signal is adjusted on the initial input clock frequency of transmission apparatus, then to clock signal of transmission apparatus output; After transmission apparatus is received this clock signal, with the frequency of this clock signal initial input clock frequency, simultaneously to clock signal of stabilized frequency output unit output as self; The stabilized frequency output unit is with the output clock frequency of the transmission apparatus clock signal correspondence that the receives frequency as self input clock signal.
The above only is process of the present invention and method embodiment, in order to restriction the present invention, all any modifications of being made within the spirit and principles in the present invention, is not equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1, a kind of device of adjusting interface transmission rate of transmission device, interface transmission rate become the fixed proportion relation with the input clock frequency of transmission apparatus, it is characterized in that this device comprises: control unit, frequency adjustment unit and transmission apparatus, wherein,
Control unit, be used for change having taken place detecting traffic data rate, and during the matching relationship of and traffic data rate satisfied when the front port transmission rate, matching relationship according to traffic data rate and interface transmission rate, in the speed range that transmission apparatus is supported, select arbitrarily a new interface transmission rate with the current business data rate, and definite transmission apparatus new input clock frequency corresponding with this new interface transmission rate; Be used to obtain the input reference frequency of frequency adjustment unit, calculate the ratio of this new input clock frequency and this input reference frequency, and this ratio is sent to the frequency adjustment unit;
The frequency adjustment unit, be used for the ratio that sends according to control unit and self input reference frequency, the frequency of self clock signal is adjusted on the new input clock frequency of transmission apparatus, should be outputed to transmission apparatus through the adjusted clock signal of frequency then;
Transmission apparatus is used for the frequency of the clock signal of the frequency adjustment unit output input clock frequency as self.
2, device as claimed in claim 1 is characterized in that, described device is applied in the base band side, and described device further comprises: baseband processing unit is used for the current business data rate is sent to control unit;
Described control unit is further used for, and receives the traffic data rate that baseband processing unit sends.
3, device as claimed in claim 1, it is characterized in that described device is applied in radio frequency side, and described device comprises further: RF processing unit, be used for the new interface transmission rate, perhaps new interface transmission rate and the speed adjustment period sends to control unit;
Described control unit is further used for, the new interface transmission rate that the received RF processing unit sends, and perhaps new interface transmission rate and speed are adjusted the period.
4, device as claimed in claim 3, it is characterized in that described device further is applied in the base band side, and, the device of base band side is further used for the new interface transmission rate, and perhaps new interface transmission rate and speed are adjusted the transmission apparatus that the period sends to radio frequency side;
The transmission apparatus of described radio frequency side is further used for new interface transmission rate that base band side device is sent, and perhaps new interface transmission rate and speed are adjusted the period and sent to RF processing unit.
5, device as claimed in claim 4, it is characterized in that, described base band side device further comprises: baseband processing unit, be used for new interface transmission rate that base band side control unit is sent, and perhaps new interface transmission rate and speed are adjusted the period and are sent to base band side transmission apparatus;
Described base band side control unit is further used for, and with the new interface transmission rate, perhaps new interface transmission rate and the speed adjustment period sends to baseband processing unit;
The transmission apparatus of described base band side is further used for, and with the new interface transmission rate that baseband processing unit sends, perhaps new interface transmission rate and speed are adjusted the transmission apparatus that the period sends to radio frequency side.
6, device as claimed in claim 1 is characterized in that, described frequency adjustment unit further comprises: stabilized frequency output unit and adjustment unit, wherein,
The stabilized frequency output unit is used for the clock signal of a frequency stabilization is outputed to adjustment unit;
Adjustment unit, be used for frequency with the clock signal of stabilized frequency output unit output as self input reference frequency, and after receiving the ratio that control unit sends, according to this ratio and self input reference frequency, adjust the frequency of self clock signal, and should output to transmission apparatus through the adjusted clock signal of frequency.
7, device as claimed in claim 6 is characterized in that, described stabilized frequency output unit is constant-temperature crystal oscillator OCXO.
8, device as claimed in claim 6 is characterized in that, described stabilized frequency output unit is VCXO phase-locked loop VCXO PLL or temperature compensating crystal oscillator phase-locked loop TCXOPLL,
Described stabilized frequency output unit is further used for, and receives the ratio of control unit output and the clock signal of transmission apparatus output, and according to the output clock frequency of this ratio and transmission apparatus clock signal correspondence, adjusts the frequency of self clock signal,
Described control unit is further used for, and calculates the ratio of frequency and the output clock frequency of the transmission apparatus that gets access to of the clock signal of the stabilized frequency output unit get access to, and this ratio is sent to the stabilized frequency output unit.
9, device as claimed in claim 6 is characterized in that, described adjustment unit is the voltage controlled oscillator phase-locked loop.
10, a kind of method of adjusting interface transmission rate of transmission device, interface transmission rate become the fixed proportion relation with the input clock frequency of transmission apparatus, it is characterized in that this method comprises:
A, detect traffic data rate change has taken place, and after front port transmission rate and traffic data rate do not satisfy matching relationship, matching relationship according to interface transmission rate and traffic data rate, in the speed range that transmission apparatus is supported, select a new interface transmission rate with the current business data rate arbitrarily;
B, determine the new input clock frequency that transmission apparatus is corresponding with the new interface transmission rate;
C, according to should be new the clock signal of input clock frequency generation corresponding frequencies, then this clock signal is sent to transmission apparatus, after transmission apparatus is received this clock signal, with the frequency of this clock signal input clock frequency as self.
11, method as claimed in claim 10 is characterized in that, preestablishes a default interface transmission rate, further comprises before the described steps A:
Determine the initial input clock frequency corresponding with this default interface transmission rate; Generate the clock signal of corresponding frequencies according to the initial input clock frequency, then this clock signal is sent to transmission apparatus, after transmission apparatus is received this clock signal, the frequency of this clock signal initial input clock frequency as self.
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| GB2554744B (en) * | 2016-10-07 | 2021-11-24 | Orisec Ltd | Control panel for a security alarm system |
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| CN101997635B (en) * | 2009-08-27 | 2013-03-27 | 中兴通讯股份有限公司 | Method and system for transforming port rate of service veneer |
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Also Published As
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| CN1852508A (en) | 2006-10-25 |
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