CN103634070A - Service data loading method, apparatus and system based on service rate - Google Patents
Service data loading method, apparatus and system based on service rate Download PDFInfo
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Abstract
The embodiments of the invention belong to the field of communications, and disclose a service data loading method, apparatus and system based on a service rate, which are capable of reducing system power consumption in a self-adaptive manner according to the change of the service rate. The method comprises the following steps: obtaining the service rate of a user, and according to the service rate of the user, determining a bit number needed to be borne by a discrete multi-tone modulation signal (DMT) within a predetermined time period; and according to the bit number needed to be borne and a reference bit loading table, calculating an actual bit loading table corresponding to the DMT, and according to the actual bit loading table, loading service data on subcarriers of the DMT. The embodiments of the invention are mainly applied to a process of reducing the system power consumption in a self-adaptive manner according to the change of the service rate of the user.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of business datum loading method, Apparatus and system based on service rate.
Background technology
Development along with broadband access technology, operator's expectation can offer the broadband inserting service of user's short distance, two-forty, scattered, the close user's house of existing this kind equipment following generation copper wire access network technology (G.fast) device distribution, operator's desired user premises equipment (Custom Premise Equipment, CPE) can, to its feedback power supply, therefore need to control G.fast equipment power dissipation.
In prior art, define L2 pattern (being low-power consumption mode) and L0 pattern (full-power mode), by distinguishing the business datum loading method of power consumption mode, reduced the power consumption of dsl device.Concrete, when user data traffic is during lower than certain threshold values, make each subcarrier carry a small amount of bit, thereby reduce the gross power of transmitted signal.When user data traffic increases, system enters LO pattern (full-power mode), to increase line speed.Or, from frequency domain, cut down subcarrier, subcarrier is divided into two kinds of low-power mode (LPM) subcarrier and non-LPM subcarriers.Under low-power consumption mode, non-LPM subcarrier is carrying user data not, thereby reduces the transmitted power of non-LPM subcarrier, even closes non-LPM subcarrier, has reduced the gross power of transmitted signal.Under full-power mode, the equal total power of all subcarriers sends, and carries valid data.
State in realization in the process of high speed data transfer, inventor finds that in prior art, at least there are the following problems: prior art is in realizing the process that reduces system power dissipation, low-power consumption and two kinds of patterns of total power that can only determining apparatus, and can not be according to the adaptive adjusting transmitted power of the variation of practical business speed or/and reduce to send subcarrier number or reduce and send D MT symbol numbers, thereby can not efficiently reduce system power dissipation.
Summary of the invention
Embodiments of the invention provide a kind of business datum loading method, Apparatus and system based on service rate, can reduce adaptively system power dissipation according to customer service rate variation.
The one side of the embodiment of the present invention, provides a kind of business datum loading method based on service rate, comprising:
Obtain customer service speed;
According to described customer service speed, determine that Discrete Multitone modulation signal (Discrete Multi-Tone modulation signal, DMT) needs the bit number of carrying;
According to described bit number and the reference bit load table of carrying of needing, calculate the actual bit load table that described DMT is corresponding, and according to described actual bit load table loaded with traffic data on the subcarrier of described DMT.
Further, on the subcarrier at described DMT according to described actual bit load table, after loaded with traffic data, described method also comprises:
According to described actual bit load table, it is described sub-carrier selection target constellation;
Adopt described target constellation to carry out constellation mapping to the business datum loading in described subcarrier.
Further, in the business datum that adopts described target constellation to load in to described subcarrier, carry out after constellation mapping, described method also comprises:
Business datum after using constellation normalization coefficient corresponding to described reference bit load table to mapping is normalized.
Further, described bit number and the reference bit load table of carrying of needing of described foundation calculated the actual bit load table that described DMT is corresponding, and according to described actual bit load table loaded with traffic data on the subcarrier of described DMT, comprising:
If described, need the bit number of carrying to be greater than 0 and be less than described DMT and allow the maximum number bits loading, carry out described bit number and the reference bit load table of carrying of needing of described foundation and calculate the actual bit load table that described DMT is corresponding.
Further, described bit number and the reference bit load table of carrying of needing of described foundation calculated the actual bit load table that described DMT is corresponding, and according to described actual bit load table loaded with traffic data on the subcarrier of described DMT, also comprises:
If described, needing the bit number of carrying is 0, does not carry out and calculates actual bit load table that described DMT is corresponding and the operation of loaded with traffic data on the subcarrier of DMT;
If described, need the bit number of carrying to equal the maximum number bits that described DMT allows loading, do not calculate the actual bit load table that described DMT is corresponding, and according to described reference bit load table loaded with traffic data on the subcarrier of described DMT.
Further, described bit number and the reference bit load table of carrying of needing of described foundation calculated the actual bit load table that described DMT is corresponding, is specially:
According to described bit number and the reference bit load table that needs carrying, adopt water flood to calculate the actual bit load table that described DMT is corresponding.
Further, determining the bit number that Discrete Multitone modulation signal DMT need to carry according to described customer service speed before, described method also comprises:
Judge that whether described customer service speed is lower than predetermined threshold;
If described customer service speed is lower than predetermined threshold, under the prerequisite that meets user's delay constraint described business datum buffer memory and converge;
Describedly according to described customer service speed, determine that the bit number that Discrete Multitone modulation signal DMT need to carry is: according to the bit number that converges rear business datum, determine the bit number that DMT need to carry.
The embodiment of the present invention on the other hand, provides a kind of business datum charger based on service rate, comprising:
Acquiring unit, for obtaining customer service speed;
Determining unit, determines for the customer service speed of obtaining according to described acquiring unit the bit number that in predetermined amount of time, Discrete Multitone modulation signal DMT need to carry;
Loading unit, for calculating according to bit number and the reference bit load table of the definite needs carrying of described determining unit the actual bit load table that described DMT is corresponding, and according to described actual bit load table loaded with traffic data on the subcarrier of described DMT.
Further, described loading unit is also for after determining the bit number that DMT need to carry in described determining unit, when the described bit number that needs carrying is greater than 0 and while being less than the maximum number bits that described DMT allows to load, carry out described bit number and the reference bit load table of carrying of needing of described foundation and calculate the actual bit load table that described DMT is corresponding.
Further, described loading unit also for: after described determining unit is determined the bit number that DMT need to carry, when the described bit number that needs carrying is 0, do not carry out actual bit load table that the described DMT of described calculating is corresponding and the operation of loaded with traffic data on the subcarrier of DMT; When the described bit number that need to carry equals the maximum number bits of described DMT permission loading, do not calculate the actual bit load table that described DMT is corresponding, and give successively the subcarrier loaded with traffic data of described DMT according to described reference bit load table.
Further, described computing unit specifically for: according to described bit number and the reference bit load table that needs carrying, adopt water flood to calculate the actual bit load table that described DMT is corresponding.
Further, the charger of this business datum can also comprise:
Map unit, for at described loading unit according to described actual bit load table on the subcarrier at described DMT after loaded with traffic data, according to described actual bit load table, be described sub-carrier selection target constellation, adopt described target constellation to carry out constellation mapping to the business datum loading in described subcarrier.
Further, the charger of described business datum can also comprise:
Normalization unit, after carrying out constellation mapping, is used the normalization coefficient of reference bit load table constellation to be normalized the business datum after shining upon for the business datum that adopts described target constellation to load described subcarrier in described map unit.
Converge unit, for determine the bit number that Discrete Multitone modulation signal DMT need to carry according to described customer service speed in described determining unit before, judge that whether customer service speed that described acquiring unit obtains is lower than predetermined threshold; When described customer service speed is during lower than predetermined threshold, under the prerequisite that meets user's delay constraint described business datum buffer memory and converge;
Described loading unit also for: according to the bit number and the reference bit load table that converge rear business datum, calculate the actual bit load table that described DMT is corresponding, and according to described actual bit load table loaded with traffic data on the subcarrier of described DMT.
Another aspect of the present invention also provides a kind of business datum loading system based on service rate, it is characterized in that, comprising: the business datum charger based on service rate; And to end device;
The described business datum charger based on service rate, for obtaining customer service speed; According to described customer service speed, determine the bit number that in predetermined amount of time, Discrete Multitone modulation signal DMT need to carry; According to described bit number and the reference bit load table of carrying of needing, calculate the actual bit load table that described DMT is corresponding, and according to described actual bit load table loaded with traffic data on the subcarrier of described DMT; The DMT that has loaded business datum is sent to end device;
Described to end device, to send for receiving the described business datum charger based on service rate Discrete Multitone modulation signal DMT, from described DMT, demodulation obtains business datum.
Business datum loading method, Apparatus and system based on service rate that the embodiment of the present invention provides, by reading cache information, obtain customer service speed, and definite DMT bit number that need to carry, calculate the actual bit load table that DMT is corresponding, then according to actual bit load table, give successively the subcarrier loaded with traffic data of DMT.Compare with the technology of only dividing two kinds of mode of operations of low-power consumption and full rate in prior art, can be according to the variation of customer service speed, dynamically change the bit number of DMT carrying, the aspect one integrated mass that reduces subcarrier number and minimizing DMT number, can reduce system power dissipation adaptively substantially.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of business datum loading method flow chart based on service rate in the embodiment of the present invention 1;
Fig. 2 is a kind of business datum loading method flow chart based on service rate in the embodiment of the present invention 2;
Fig. 3 is a kind of DMT bit padding schematic diagram in the embodiment of the present invention 2;
Fig. 4 is the another kind of DMT bit padding schematic diagram in the embodiment of the present invention 2;
Fig. 5 is that a kind of business datum charger based on service rate in the embodiment of the present invention 3 forms schematic diagram;
Fig. 6 is that another kind in the embodiment of the present invention 3 business datum charger based on service rate forms schematic diagram;
Fig. 7 is that a kind of business datum charger based on service rate in the embodiment of the present invention 4 forms schematic diagram;
Fig. 8 is that a kind of business datum loading system based on service rate in the embodiment of the present invention 4 forms schematic diagram.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of business datum loading method based on service rate, as shown in Figure 1, comprising:
101, obtain customer service speed.
Wherein, the method of obtaining customer service speed can be: user service data is carried out to buffer memory, and read the described user service data of buffer memory, determine (a for example DMT cycle) buffer memory in certain hour described user service data number, determine customer service speed.
102, according to described customer service speed, determine the bit number that in predetermined amount of time, DMT need to carry.
Wherein, if the bit number of buffer memory is more than or equal to reference bit load table (the bit load table calculating according to channel capacity, it defines the maximum bit loading number allowing of each subcarrier) total number of bits, the bit number that DMT need to carry equals the total number of bits of reference bit load table; If the bit number of buffer memory is less than the total number of bits of reference bit load table, and these bits reach far away delay constraint, and the bit number that DMT need to carry equals 0; If the bit number of buffer memory is less than the sum of reference bit load table, and these reach delay constraint than express train, and the bit number that DMT need to carry equals the total number of bits in buffer memory.
Wherein, reference bit load table is signal to noise ratio (the Signal to Noise Ratio by channel, SNR) and configuration Signal to Noise Ratio Margin (SNR Margin, SNRM) etc. the bit load table calculating according to shannon formula, for example, Very-high-speed Digital Subscriber Line 2 (Very-high-bit-rate Digital Subscriber Line 2, the operation bit load table that initialization VDSL2) enters the operating time when (Showtime).
103, according to described bit number and the reference bit load table of carrying of needing, calculate the actual bit load table that described DMT is corresponding, and according to described actual bit load table loaded with traffic data on the subcarrier of described DMT.
Wherein, when the described bit number that needs carrying be greater than 0 and lower than DMT, can carry maximum number bits time, according to described bit number and the reference bit load table of carrying of needing, calculate the actual bit load table that described DMT is corresponding, when the bit number of needs carrying changes, just need to recalculate actual bit load table.When the described bit number that needs carrying reaches the maximum number bits that DMT can carry, using described reference bit load table as actual bit load table corresponding to described DMT, carry out the loading of business datum.
Wherein, if in described actual bit load table, it is 0 that a certain subcarrier needs bit loading number, and this subcarrier does not need loaded with traffic data, does not send this subcarrier yet.If in described actual bit load table, a plurality of subcarriers do not need loaded with traffic data, these subcarriers all need not send, just so the signal transmitting power of this DMT can significantly decline.
The business datum loading method based on service rate that the embodiment of the present invention provides, by reading cache information, obtain customer service speed, and definite DMT bit number that need to carry, and calculate the actual bit load table that DMT is corresponding, then according to actual bit load table, give successively the subcarrier loaded with traffic data of DMT.Compare with the technology of only dividing two kinds of mode of operations of low-power consumption and full rate in prior art, can be according to the variation of customer service speed, dynamically change the bit number of DMT carrying, thereby reduce signal transmitting power, reduce subcarrier number and reduce DMT number, can reduce adaptively system power dissipation.
The embodiment of the present invention provides a kind of business datum loading method based on service rate, as shown in Figure 4, comprising:
201, obtain customer service speed.
202, when described customer service speed is during lower than predetermined threshold, under the prerequisite that meets user's delay constraint described business datum buffer memory and converge.
In the present embodiment, step 202 is optional step, when customer service speed is during lower than predetermined threshold, can continue to send the DMT that loads a small amount of business datum, therefore can be by step 202 by business sentence buffer memory and converge, the business datum after converging is loaded in DMT and is sent.
Wherein, described user's delay constraint refers to not affecting the restriction of the longest business datum time delay of user's regular traffic contact, can be arranged by system, also can be preset by user.Within the scope of user's delay constraint, because described customer service speed is lower than predetermined threshold, can and converge described business datum buffer memory, concentrate in one or several DMT and send together, the number sending to reduce DMT.Buffer memory puts together transmission after converging like this, can greatly reduce the number that sends DMT, for example reduce to original 1/5,1/10 even more, at the time slot that does not send DMT, in order to reduce the power consumption of system, can freeze digital front-end (Digtal Front-end, DFE) and dormancy AFE (analog front end) (Analog Front-end, AFE).
203, according to described customer service speed, determine the bit number that in predetermined amount of time, DMT need to carry.
Further alternative, in order further to reduce equipment power dissipation, can also reduce the number that sends DMT according to service rate, therefore, the method for the embodiment of the present invention can also comprise the following steps 204-206:
If 204 described to need the bit numbers of carrying be 0, do not carry out and calculate actual bit load table that described DMT is corresponding and the operation of loaded with traffic data on the subcarrier of DMT.
Wherein, when the described bit number that need to carry is 0, can send described DMT, and not need to carry out the follow-up flow processs such as loading, constellation mapping and normalization of business datum, can reduce the power consumption that DMT loads and modulates.Meanwhile, reduce the number that sends DMT, also reached the object that reduces sending power consumption.
If the 205 described bit numbers of carrying that need equal the maximum number bits that described DMT allows loading, do not calculate the actual bit load table that described DMT is corresponding, and according to described reference bit load table loaded with traffic data on the subcarrier of described DMT.
Wherein, when the described bit number that need to carry equals the maximum number bits of described DMT permission loading, can only rely on reference bit load table BAT and carry out business datum loading, at transmitting terminal and receiving terminal, all store described reference bit load table, can be directly according to described reference bit load table loaded with traffic data on the subcarrier of described DMT, can reduce unnecessary calculating, simplify the load step of described business datum.
If the 206 described bit numbers that need carrying are greater than 0 and be less than described DMT and allow the maximum number bits loading, according to described bit number and the reference bit load table of carrying of needing, calculate the actual bit load table that described DMT is corresponding.
Wherein, described foundation is described while needing the bit number of carrying and reference bit load table to calculate actual bit load table corresponding to described DMT, and the bit number that every change need to be carried once, just need to once calculate.The method of calculating actual bit load table BAT_current in conjunction with a simple example explanation, for example, a simple DMT, always has 18 subcarriers (max_num_tone=18), and the bit number that each subcarrier can carry has formed described reference bit load table (Bit Adding Table, BAT), specific as follows: BAT (i)={ 0,2,4,5,5,4,3,2,2,3,4,5,6,6,5,4,2,0}, as shown in Figure 3.
Traditional, the business datum load step that only depends on benchmark BAT is as follows: (1) receiving-transmitting sides synchronous base BAT, receiving-transmitting sides copies a benchmark BAT in advance.(2) the benchmark BAT that search copies in advance, obtains the maximum number bits (max_bits) that benchmark BAT sub-carriers can be carried, as shown in Figure 3 max_bits=6.(3) according to benchmark BAT and max_bits, calculate the bit number BAT_layer (j) of j layer, as shown in Figure 3, BAT_layer (j)={ 17,17,13,10,6,2}.
In step 206, not only depended on benchmark BAT but also depended on the business datum load step of the number L of bits _ act that needs carrying as follows: (1) obtains L_act by step 203, the search in advance benchmark BAT of copy obtains max_bits, according to L_act and max_bits computing service data, can load full number of plies Load_layer completely, and after having loaded these layers, the remaining bits of traffic data not being loaded is counted Load_remain.As shown in Figure 4, suppose L_act=46bits, can calculate Load_layer=4, Load_remain=15.(2) by the L_act obtaining and the Load_layer and the Load_remain that calculate, calculate described actual bit load table BAT_current, wherein, BAT_act (i) is the bit number of i subcarrier actual loaded in described actual bit load table BAT_current, as shown in Figure 4.
For example, above-mentioned by the L_act obtaining and the Load_layer and the Load_remain that calculate, the specific algorithm that calculates described actual bit load table BAT_current is exemplified below, and the algorithm that calculates actual bit load table is including, but not limited to following algorithm:
//Load_layer: the number of plies that bit can load completely;
//Load_remain: the last not enough remaining bit number of one deck that loads;
//max_bits: maximum number bits is also the maximum number of plies;
Subcarrier number in //max_num_tone:BAT;
//BAT_layer (j): j layer bit number;
//BAT_act (i): the bit number of i subcarrier actual loaded in actual bit load table BAT_current
In this example, L_act=46bits, Load_layer=4, Load_remain=15, apply the bit number that above-mentioned algorithm calculates each subcarrier actual loaded in described actual bit load table BAT_current, actual bit load table is: BAT_act (i)={ 0,1,3,4,4,3,2,2,1,1,2,3,4,5,5,4,2,0}.With reference bit load table BAT (i)={ 0,2,4,5,5,4,3,2,2,3,4,5,6,6,5,4,2,0} compares, and has reduced the loading of bit.
In this example, the method of the actual bit load table that the described DMT of described calculating is corresponding can also comprise: according to bit number and the reference bit load table of described needs carrying, adopt water flood to calculate the actual bit load table that described DMT is corresponding, make each bit be loaded into current signal to noise ratio (Signal to Noise Ratio, SNR), in best subcarrier, make the transmitted power of all bits minimum.
Wherein, described water flood is bit number and the reference bit load table of carrying as required, from the bottom of bit load table, start to carry out loaded with traffic data, the bottom loads full business datum of carrying out again last layer afterwards and loads, until the described whole loadeds of business datum that need carrying, the bit number having loaded equates with the described bit number of carrying that needs.According to described water flood, also can determine described actual bit load table, for example, according to water flood, can determine number of plies Load_layer, the last not enough remaining number L of bits oad_remain of one deck etc. that loads that above-mentioned bit can load completely.
207, according to described actual bit load table loaded with traffic data on the subcarrier of described DMT.
Wherein, according to described actual bit load table on the subcarrier of described DMT during loaded with traffic data, specifically, according to the bit number that in described actual bit load table, each subcarrier actual needs loads, give the corresponding subcarrier loaded with traffic data in described DMT.
Further alternative, while carrying out constellation mapping due to the different big or small constellations of employing, the power of consumption is different, on the subcarrier in step 207 at DMT, after loaded with traffic data, can also comprise the following steps 208 and 209:
208, according to described actual bit load table, be described sub-carrier selection target constellation, adopt described target constellation to carry out constellation mapping to the business datum loading in described subcarrier.
At the present embodiment, middle step 208 and 209 is optional steps.Wherein, described constellation mapping is the business datum in described subcarrier to be chosen to corresponding constellation be transformed into the symbol in frequency domain, and mapping mode corresponding to different constellations, different mapping modes is applicable to different bit numbers, so, need to select the target constellation of corresponding size with it to shine upon it according to the bit number of business datum in described each subcarrier.For example, if the business datum of a subcarrier is 4 bits, select 2 16QAM corresponding to 4 powers to carry out constellation mapping to the business datum in this subcarrier; If the business datum of another subcarrier is 2 bits, select 2 4QAM corresponding to 2 powers to carry out constellation mapping to the business datum in this subcarrier.It should be noted that, mapping mode-quadrature amplitude modulation of mentioning in the present embodiment (Quadrature Amplitude Modulation, QAM), be only for illustrate the present invention in constellation mapping process, choose target constellation be according to the bit number of business datum in described each subcarrier number, the mapping mode in described constellation mapping process is including, but not limited to this.
Further alternative, due to the business datum loading in described subcarrier is carried out after constellation mapping, also need mapping result to carry out constellation normalized, so the method for the embodiment of the present invention can also comprise the following steps 209:
209, use the constellation normalization coefficient of reference bit load table to be normalized the business datum after shining upon.
For example, in the reference bit load table of a subcarrier, carry 6 bits, but in actual bit load table, carry 4 bits, so 4 bits of this subcarrier carrying.In the present embodiment, use the target constellation of 24 powers (16QAM) to shine upon, to the mapping result obtaining: quadrature (Q) component and homophase (I) component are used the constellation normalization coefficient of 26 powers (64QAM) to be normalized.Z=g in VDSL2 standard
i* tss
i* χ (b) * (X+jY), wherein, plural number (X+jY) is Q and the I component of constellation mapping, and these two components are quadratures, and incoherent mutually; χ (b) is constellation normalization coefficient (or power normalization factor); g
iit is fader; tss
iit is frequency domain frequency spectrum modifying coefficient.
In the present embodiment, in constellation mapping, the selection of target constellation is according to DMT actual bit load table, and the selection of normalization coefficient is according to the reference bit load table of DMT in constellation normalization, this size with selective dependency target constellation in constellation mapping of constellation normalization coefficient in prior art is different.Because the constellation of described reference bit load table is more than or equal to the constellation of actual bit load table, so its constellation normalization coefficient is less than constellation normalization coefficient of the prior art, but, its constellation normalized energy is proportional to the bit number of this subcarrier carrying and is no more than the normalized energy of constellation in prior art, the bit of DMT carrying is fewer like this, needs the power of transmission also less.
It should be noted that, in completing to each subcarrier after loaded with traffic data, including, but not limited to the business datum of described loading being carried out to constellation mapping and constellation normalized, can also comprise other handling processes such as windowing, Fourier Tranform, the embodiment of the present invention is not described in detail.
Further alternative, to end device, after receiving DMT, also can from DMT, demodulate business datum according to actual bit load table, so the method for the embodiment of the present invention can also comprise the following steps 210:
210, to opposite end, send the described bit number that needs carrying, so that described opposite end calculates according to described bit number and the existing reference bit load table of carrying of needing the actual bit load table that described DMT is corresponding.
In the present embodiment, step 210 is optional steps.Wherein, described is the bit number variation that is causing described needs to load due to described customer service rate variation at every turn to the described bit number that need to carry of opposite end transmission, and then carry out in the situation of the bit number that described in affecting, each subcarrier actual needs loads.Transmitting terminal can only be told the total number of bits that DMT need to carry described in opposite end, described opposite end is according to described bit number and the existing reference bit load table that needs carrying of receiving, by calculating the specific algorithm of described actual bit load table described in step 206, calculate the bit load condition after variation, to resolve to the received signal.Such interactive mode, makes only to need between sending and receiving end mutual little information.
Wherein, described opposite end is according to described bit number and the existing reference bit load table that needs carrying of receiving, the actual bit load table calculating by calculating the specific algorithm of described actual bit load table in step 206, the actual bit load table calculating according to the described bit number that need to carry and reference bit load table with transmitting terminal described in step 206 is the same.
In the present embodiment, after step 209, can also comprise the DMT after the DMT after loaded with traffic data or normalized is sent to opposite end, because DMT is that the bit number carrying according to actual needs loads, wherein do not insert idle bit, when therefore opposite end receives described DMT, also corresponding reduction of received power, can save system power dissipation.
The business datum loading method based on service rate that the embodiment of the present invention provides, by reading cache information, obtain customer service speed, and definite DMT bit number that need to carry, and calculate the actual bit load table that DMT is corresponding, then according to actual bit load table, give successively the subcarrier loaded with traffic data of DMT.Compare with the technology of only dividing two kinds of mode of operations of low-power consumption and full rate in prior art, can be according to the variation of customer service speed, dynamically change the bit number of DMT carrying, the aspect one integrated mass that reduces subcarrier number and minimizing DMT number, can reduce system power dissipation adaptively substantially.
And, when the described bit number that need to carry is 0, can send DMT, and not need to carry out the follow-up flow processs such as loading, constellation mapping and normalization of business datum, can reduce the power consumption that DMT loads and modulates.Meanwhile, reduce the number that sends DMT, also reached the object that reduces sending power consumption.
The embodiment of the present invention provides a kind of business datum charger based on service rate, as shown in Figure 5, comprising: acquiring unit 31, determining unit 32, loading unit 33.
Acquiring unit 31, for obtaining customer service speed.
Determining unit 32, determines for the customer service speed of obtaining according to described acquiring unit 31 bit number that in predetermined amount of time, Discrete Multitone modulation signal DMT need to carry.
Further, described loading unit 33 also for: after described determining unit 32 is determined the bit number that DMT need to carry, when the described bit number that needs carrying is greater than 0 and while being less than the maximum number bits that described DMT allows to load, carry out described bit number and the reference bit load table of carrying of needing of described foundation and calculate the actual bit load table that described DMT is corresponding, and according to described actual bit load table loaded with traffic data on the subcarrier of described DMT.
Further, described loading unit 33 is also for after the bit number that need to carry at the definite DMT of described determining unit 32, when the described bit number that needs carrying is 0, do not carry out actual bit load table that the described DMT of described calculating is corresponding and the operation of loaded with traffic data on the subcarrier of DMT; When the described bit number that need to carry equals the maximum number bits of described DMT permission loading, do not calculate the actual bit load table that described DMT is corresponding, and according to described reference bit load table loaded with traffic data on the subcarrier of described DMT.
Further, described loading unit 33 also for: according to described bit number and the reference bit load table that needs carrying, adopt water flood to calculate the actual bit load table that described DMT is corresponding.
As shown in Figure 6, business datum charger that should be based on service rate can also comprise: map unit 34, normalization unit 35, converge unit 36.
Described loading unit 33 also for: according to described in converge the business datum after unit 36 converges bit number and reference bit load table calculate the actual bit load table that described DMT is corresponding, and according to described actual bit load table loaded with traffic data on the subcarrier of described DMT.
It should be noted that, the corresponding content of the specific descriptions of part functional module in can reference method embodiment in the business datum charger based on service rate that the embodiment of the present invention provides, the present embodiment is no longer described in detail here.
The business datum charger based on service rate that the embodiment of the present invention provides, by reading cache information, obtain customer service speed, and definite DMT bit number that need to carry, and calculate the actual bit load table that DMT is corresponding, then according to actual bit load table, give successively the subcarrier loaded with traffic data of DMT.Compare with the technology of only dividing two kinds of mode of operations of low-power consumption and full rate in prior art, can be according to the variation of customer service speed, dynamically change the bit number of DMT carrying, thereby reduce signal transmitting power, reduce subcarrier number and reduce DMT number, can reduce adaptively system power dissipation.
The embodiment of the present invention provides a kind of business datum charger based on service rate, as shown in Figure 7, comprising: receiver 41, processor 42, transmitter 43.
Described transmitter 43, can also be for send the described bit number that needs carrying to opposite end, so that described opposite end calculates according to described bit number and the existing reference bit load table of carrying of needing the actual bit load table that described DMT is corresponding.
Further, described processor 42 is also for to need the bit number of carrying be 0 o'clock described, do not carry out actual bit load table that the described DMT of described calculating is corresponding and the operation of loaded with traffic data on the subcarrier of DMT; When the described bit number that need to carry equals the maximum number bits of described DMT permission loading, do not calculate the actual bit load table that described DMT is corresponding, and according to described reference bit load table loaded with traffic data on the subcarrier of described DMT; At the described bit number that needs carrying, be greater than 0 and while being less than the maximum number bits that described DMT allows to load, carry out described bit number and the reference bit load table of carrying of needing of described foundation and calculate the actual bit load table that described DMT is corresponding, and according to described actual bit load table loaded with traffic data on the subcarrier of described DMT.
Further, described processor 42 is also for after loaded with traffic data on the subcarrier at described DMT according to described actual bit load table, according to described actual bit load table, be described sub-carrier selection target constellation, adopt described target constellation to carry out constellation mapping to the business datum loading in described subcarrier; Further, also can be used for using the constellation normalization coefficient of reference bit load table to be normalized the business datum after shining upon.
Further, described processor 42 is also for before determining the bit number that Discrete Multitone modulation signal DMT need to carry according to described customer service speed, judges that whether customer service speed that described acquiring unit obtains is lower than predetermined threshold; When described customer service speed is during lower than predetermined threshold, under the prerequisite that meets user's delay constraint described business datum buffer memory and converge.In this scene, according to needing bit number and the reference bit load table of carrying, calculate the actual bit load table that described DMT is corresponding, and according to the method for described actual bit load table loaded with traffic data on the subcarrier of described DMT can be: according to the bit number and the reference bit load table that converge rear business datum, calculate the actual bit load table that described DMT is corresponding, and according to described actual bit load table loaded with traffic data on the subcarrier of described DMT.
As described in Figure 8, the embodiment of the present invention also provides a kind of business datum loading system based on service rate, can comprise: the business datum charger 51 based on service rate and to end device 52.
The described business datum charger 51 based on service rate, for obtaining customer service speed; According to described customer service speed, determine the bit number that in predetermined amount of time, Discrete Multitone modulation signal DMT need to carry; According to described bit number and the reference bit load table of carrying of needing, calculate the actual bit load table that described DMT is corresponding, and according to described actual bit load table loaded with traffic data on the subcarrier of described DMT; The DMT that has loaded business datum is sent to end device 52.
Described to end device 52, to send for receiving the described business datum charger 51 based on service rate DMT, from described DMT, demodulation obtains business datum.
Further, above-mentioned business datum charger 51 and can carry out business datum loading processing according to the method described in all embodiment above respectively to end device 52, just repeats no more here.
Business datum charger and system based on service rate that the embodiment of the present invention provides, by reading cache information, obtain customer service speed, and definite DMT bit number that need to carry, and calculate the actual bit load table that DMT is corresponding, then according to actual bit load table, give successively the subcarrier loaded with traffic data of DMT.Compare with the technology of only dividing two kinds of mode of operations of low-power consumption and full rate in prior art, can be according to the variation of customer service speed, dynamically change the bit number of DMT carrying, the aspect one integrated mass that reduces subcarrier number and minimizing DMT number, can reduce system power dissipation adaptively substantially.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential common hardware by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Understanding based on such, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium can read, as the floppy disk of computer, hard disk or CD etc., comprise some instructions with so that computer equipment (can be personal computer, server, or the network equipment etc.) carry out the method described in each embodiment of the present invention.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.
Claims (15)
1. the business datum loading method based on service rate, is characterized in that, comprising:
Obtain customer service speed;
According to described customer service speed, determine the bit number that in predetermined amount of time, Discrete Multitone modulation signal DMT need to carry;
According to described bit number and the reference bit load table of carrying of needing, calculate the actual bit load table that described DMT is corresponding, and according to described actual bit load table loaded with traffic data on the subcarrier of described DMT.
2. the business datum loading method based on service rate according to claim 1, is characterized in that, on the subcarrier at described DMT according to described actual bit load table, after loaded with traffic data, described method also comprises:
According to described actual bit load table, it is described sub-carrier selection target constellation;
Adopt described target constellation to carry out constellation mapping to the business datum loading in described subcarrier.
3. the business datum loading method based on service rate according to claim 2, is characterized in that, after the business datum that adopts described target constellation to load in to described subcarrier is carried out constellation mapping, described method also comprises:
Business datum after using constellation normalization coefficient corresponding to described reference bit load table to mapping is normalized.
4. the business datum loading method based on service rate according to claim 1, it is characterized in that, described bit number and the reference bit load table of carrying of needing of described foundation calculated the actual bit load table that described DMT is corresponding, and according to described actual bit load table loaded with traffic data on the subcarrier of described DMT, comprising:
If described, need the bit number of carrying to be greater than 0 and be less than described DMT and allow the maximum number bits loading, carry out described bit number and the reference bit load table of carrying of needing of described foundation and calculate the actual bit load table that described DMT is corresponding, and according to described actual bit load table loaded with traffic data on the subcarrier of described DMT.
5. the business datum loading method based on service rate according to claim 4, it is characterized in that, described bit number and the reference bit load table of carrying of needing of described foundation calculated the actual bit load table that described DMT is corresponding, and according to described actual bit load table loaded with traffic data on the subcarrier of described DMT, also comprise:
If described, needing the bit number of carrying is 0, does not carry out and calculates actual bit load table that described DMT is corresponding and the operation of loaded with traffic data on the subcarrier of DMT;
If described, need the bit number of carrying to equal the maximum number bits that described DMT allows loading, do not calculate the actual bit load table that described DMT is corresponding, and according to described reference bit load table loaded with traffic data on the subcarrier of described DMT.
6. the business datum loading method based on service rate according to claim 4, described bit number and the reference bit load table of carrying of needing of described foundation calculated the actual bit load table that described DMT is corresponding, is specially:
According to described bit number and the reference bit load table that needs carrying, adopt water flood to calculate the actual bit load table that described DMT is corresponding.
7. the business datum loading method based on service rate according to claim 1, is characterized in that, determine the bit number that Discrete Multitone modulation signal DMT need to carry according to described customer service speed before, described method also comprises:
Judge that whether described customer service speed is lower than predetermined threshold;
If described customer service speed is lower than predetermined threshold, under the prerequisite that meets user's delay constraint described business datum buffer memory and converge;
Describedly according to described customer service speed, determine that the bit number that Discrete Multitone modulation signal DMT need to carry is: according to the bit number that converges rear business datum, determine the bit number that DMT need to carry.
8. the business datum charger based on service rate, is characterized in that, comprising:
Acquiring unit, for obtaining customer service speed;
Determining unit, determines for the customer service speed of obtaining according to described acquiring unit the bit number that in predetermined amount of time, Discrete Multitone modulation signal DMT need to carry;
Loading unit, for calculating according to bit number and the reference bit load table of the definite needs carrying of described determining unit the actual bit load table that described DMT is corresponding, and according to described actual bit load table loaded with traffic data on the subcarrier of described DMT.
9. the business datum charger based on service rate according to claim 8, is characterized in that, also comprises:
Map unit, for at described loading unit according to described actual bit load table on the subcarrier at described DMT after loaded with traffic data, according to described actual bit load table, be described sub-carrier selection target constellation, adopt described target constellation to carry out constellation mapping to the business datum loading in described subcarrier.
10. the business datum charger based on service rate according to claim 8 or claim 9, is characterized in that, also comprises:
Normalization unit, after carrying out constellation mapping, is used constellation normalization coefficient corresponding to reference bit load table to be normalized the business datum after shining upon for the business datum that adopts described target constellation to load described subcarrier in described map unit.
The 11. business datum chargers based on service rate according to claim 8, it is characterized in that, described loading unit also for: after described determining unit is determined the bit number that DMT need to carry, when the described bit number that needs carrying is greater than 0 and while being less than the maximum number bits that described DMT allows to load, carry out described bit number and the reference bit load table of carrying of needing of described foundation and calculate the actual bit load table that described DMT is corresponding, and according to described actual bit load table loaded with traffic data on the subcarrier of described DMT.
The 12. business datum chargers based on service rate according to claim 11, it is characterized in that, described loading unit also for: after described determining unit is determined the bit number that DMT need to carry, when the described bit number that needs carrying is 0, do not carry out actual bit load table that the described DMT of described calculating is corresponding and the operation of loaded with traffic data on the subcarrier of DMT; When the described bit number that need to carry equals the maximum number bits of described DMT permission loading, do not calculate the actual bit load table that described DMT is corresponding, and according to described reference bit load table loaded with traffic data on the subcarrier of described DMT.
The 13. business datum chargers based on service rate according to claim 11, it is characterized in that, described loading unit specifically for: according to described bit number and the reference bit load table that needs carrying, adopt water flood to calculate the actual bit load table that described DMT is corresponding.
The 14. business datum chargers based on service rate according to claim 8, is characterized in that, also comprise:
Converge unit, for determine the bit number that Discrete Multitone modulation signal DMT need to carry according to described customer service speed in described determining unit before, judge that whether customer service speed that described acquiring unit obtains is lower than predetermined threshold; When described customer service speed is during lower than predetermined threshold, under the prerequisite that meets user's delay constraint described business datum buffer memory and converge;
Described loading unit also for: according to the bit number and the reference bit load table that converge rear business datum, calculate the actual bit load table that described DMT is corresponding, and according to described actual bit load table loaded with traffic data on the subcarrier of described DMT.
15. 1 kinds of business datum loading systems based on service rate, is characterized in that, comprising:
The business datum charger based on service rate as described in any one in claim 8-14; And to end device;
The described business datum charger based on service rate, also for sending to the Discrete Multitone modulation signal DMT that has loaded business datum to end device;
Described to end device, to send for receiving the described business datum charger based on service rate DMT, from described DMT, demodulation obtains business datum.
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