CN104754724A - Method, device and equipment for realizing clock synchronization in wireless access network - Google Patents
Method, device and equipment for realizing clock synchronization in wireless access network Download PDFInfo
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- CN104754724A CN104754724A CN201310745536.1A CN201310745536A CN104754724A CN 104754724 A CN104754724 A CN 104754724A CN 201310745536 A CN201310745536 A CN 201310745536A CN 104754724 A CN104754724 A CN 104754724A
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- 238000012544 monitoring process Methods 0.000 claims abstract description 262
- 238000011282 treatment Methods 0.000 claims description 59
- 230000001360 synchronised effect Effects 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 description 7
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/002—Mutual synchronization
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/003—Arrangements to increase tolerance to errors in transmission or reception timing
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Abstract
The invention discloses a method, device and equipment for realizing clock synchronization in wireless access network processing equipment. The method includes that confirming the processing speed of one or more monitoring windows in the current monitoring time according to the prior received quantity of received data packets and the prior processed quality of processed data packets in the previous monitoring time period, wherein the monitoring time comprises at least one monitoring window, and the monitoring window comprises one or more time intervals; counting the received quantity of received data packets and the processed quantity of processed data packets in the current monitoring time so as to confirm the processing speed of some or all of the monitoring windows in the next monitoring time period based on the current received quantity and current processed quantity.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of method, device and equipment for realizing clock synchronous in wireless access network.
Background technology
In the prior art, baseband processing unit (Base Band Unit, BBU) pond (BBUpooling) product will be applied to new wireless access network (Radio Access Network, RAN) in framework, in this kind of product, the flexibility that Ir interface between baseband processing unit and Remote Radio Unit (RadioRemote Unit, RRU) is selected can be expanded.And use public network, such as use Packet Transport Network (Packet Transport Network, PTN), carrying Ir business has also become a kind of trend.But, common public radio interface (Common Public Radio Interface is substituted at this PTN, CPRI) in framework, distributed for BBU and RRU reference clock separately, the clock source that BBU and RRU is ununified, therefore certainly exists clock drift (clock drift) between BBU and RRU.If cannot revise the clock drift between BBU and RRU, then the aerial speed that BBU can be caused cannot to send data with RRU to subscriber equipment to the transmission rate that RRU sends data matches, thus has a strong impact on performance and the throughput of system.
Fig. 1 shows the exemplary architecture figure of a kind of Ir interface based on the system of PTN carrying (Ir over PTN, IroPTN).
With reference to Fig. 1, this IroPTN system comprises the BBU of multiple PTN of being connected to and multiple RRU being connected to PTN.Wherein, BBU and RRU uses asynchronous clock system, and the time interval that BBU is often T through duration sends packet to RRU, and RRU is based on the packet of identical time interval T process reception.
But, due to the difference of the reference clock of BBU and RRU, in fact, the time interval T that BBU with RRU uses separately is also identical, namely BBU sends data based on time interval T1 to RRU according to the reference clock (RC1) of himself, and RRU processes the data from BBU based on time interval T2 according to the reference clock (RC2) of himself.Due to the gap of BBU and the RRU precision of reference clock separately, in fact, between T1 and T2, there is difference.As time goes on, the difference between T1 and T2 can constantly be accumulated, thus causes over time occurring larger gap between RC1 and RC2.
Summary of the invention
The object of this invention is to provide a kind of method and apparatus for realizing clock synchronous in the treatment facility of wireless access network.
According to an aspect of the present invention, provide a kind of method for realizing clock synchronous in the treatment facility of wireless access network, wherein, treatment facility receives the packet from transmitting apparatus every the identical time interval, further, every the same time interval, packet is processed, wherein, said method comprising the steps of:
A according to the packet received in monitoring time the last period at first quantities received and processed packet in first treating capacity, determine the processing speed of the one or more monitoring windows in current monitoring time; Wherein, described monitoring time comprises at least one monitoring window, and described monitoring window comprises one or more time interval;
B adds up the quantities received of the packet received in current monitoring time and the treating capacity of processed packet, to determine the processing speed of partly or entirely monitoring window in next section of monitoring time based on described current quantities received and described current treating capacity.
According to an aspect of the present invention, additionally provide a kind of synchronizer for realizing clock synchronous in the treatment facility of wireless access network, wherein, treatment facility receives the packet from transmitting apparatus every the identical time interval, further, every the same time interval, packet is processed, wherein, described synchronizer comprises:
First determining device, for the packet that receives in monitoring time according to the last period at first quantities received and processed packet in first treating capacity, determine the processing speed of the one or more monitoring windows in current monitoring time; Wherein, described monitoring time comprises at least one monitoring window, and described monitoring window comprises one or more time interval;
Statistic device, for the treating capacity of the quantities received and processed packet of adding up the packet received in current monitoring time, to determine the processing speed of partly or entirely monitoring window in next section of monitoring time based on described current quantities received and described current treating capacity.
Compared with prior art, the present invention has the following advantages: by regulating packet processing speed in processing, the speed making transmitting apparatus (such as BBU) send data to treatment facility keeps synchronous with the speed for the treatment of facility (such as RRU) deal with data, thus the problem that the speed solving the transmitting apparatus transmission data that the clock drift between transmitting apparatus and treatment facility brings cannot match with the speed for the treatment of facility deal with data, decrease transmitting apparatus and send to treatment facility the impact that the transmission rate of data and treatment facility to send difference from the aerial speed of data to subscriber equipment brings.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 shows the Organization Chart of the system of the IroPTN that Ir interface carries based on PTN;
Fig. 2 shows according to a kind of method flow diagram for realizing clock synchronous in the treatment facility of wireless access network of the present invention;
Fig. 3 shows the structural representation according to a kind of synchronizer for realizing clock synchronous in the treatment facility of wireless access network of the present invention.
In accompanying drawing, same or analogous Reference numeral represents same or analogous parts.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 2 shows according to a kind of method flow diagram for realizing clock synchronous in the treatment facility of wireless access network of the present invention.Method according to the present invention comprises step S1 and step S2.
Wherein, treatment facility receives the packet from transmitting apparatus every the identical time interval, and, every the same time interval, packet is processed.
Preferably, described treatment facility and/or described transmitting apparatus are contained in base station.More preferably, described base station comprises the base station adopting Remote Radio Technique.Wherein, described dispensing device comprises baseband processing unit (Base Band Unit, BBU), and described processing unit comprises Remote Radio Unit (Radio Remote Unit, RRU); Or described dispensing device comprises RRU, described processing unit comprises BBU.
Wherein, method according to the present invention is realized by the synchronizer in dispensing device and/or processing unit.
With reference to Fig. 2, in step sl, synchronizer according to the packet received in monitoring time the last period at first quantities received and processed packet in first treating capacity, determine the processing speed of the one or more monitoring windows in current monitoring time.
Wherein, described monitoring time comprises at least one monitoring window, and described monitoring window comprises one or more time interval.
Wherein, can be continuous print between each section of monitoring time, or, can interval scheduled duration between each section of monitoring time, such as, interval 1 second etc. between each section of monitoring time.
Preferably, determine the mode of the size of described monitoring window include but not limited to following any one:
1) determine based on self-defined configuration;
2) determine based on practical experience hard coded;
3) determine after carrying out Automatic adjusument according to the network model of PTN.
Preferably, determine the mode of the number in the time interval comprised in monitoring time and aforementionedly determine that the mode of the size of described monitoring window is same or similar, repeating no more herein.
Preferably, determine the mode of the number in the time interval comprised in each monitoring window in monitoring time and aforementionedly determine that the mode of the size of described monitoring window is same or similar, repeating no more herein.
Preferably, described step S1 comprises step S101(figure further and does not show) and step S101 ' (not shown).
In step S101, when described first quantities received be greater than described in first treating capacity time, synchronizer based on the described window treatments amount increasing the one or more monitoring windows in current monitoring time at first quantities received and the described difference in first treating capacity, to accelerate the processing speed of packet;
In step S101 ', when described first quantities received be less than described in first treating capacity time, synchronizer based on the described window treatments amount reducing the one or more monitoring windows in current monitoring time at first quantities received and the described difference in first treating capacity, to reduce the processing speed of packet.
Preferably, described step S1 also comprise step S102(figure do not show).
In step s 102, synchronizer selects one or more monitoring window according to described in first quantities received and the described difference in first treating capacity from described monitoring time, to adjust the processing speed of the packet of described one or more monitoring window.
Preferably, the number of the monitoring window selected by synchronizer is directly proportional to the absolute value of described difference.
More preferably, when at first quantities received with when the difference of first treating capacity is less, synchronizer selects a monitoring window to adjust the processing speed of the packet of this monitoring window from monitoring time, when at first quantities received with when the difference of first treating capacity is larger, synchronizer selects more than one monitoring window to adjust the processing speed of the packet of this more than one monitoring window from monitoring time.
Preferably, the amplitude of accommodation of window treatments speed is directly proportional to the absolute value of described difference.Such as, based on difference relative to the percentage in first treating capacity, the processing speed of selected one or more monitoring windows is increased or reduces corresponding percentage etc.
More preferably, directly using the regulated value of described difference as the processing speed of monitoring window.
According to the first example of the present invention, in IroPTN system, described monitoring time comprises 1024 monitoring windows, and each window treatments amount of monitoring window initial is 20.The packet 20029 from BBU that synchronizer in RRU received in monitoring time in the last period, and determine that packet processed in RRU is 20027, then synchronizer is according to being somebody's turn to do at first quantities received 20029 with in first treating capacity 20027, determine that both differences are 2, and using difference as recruitment, the window treatments amount of first monitoring window in preselected current monitoring time is increased to 22.
It should be noted that, above-mentioned citing is only and technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, any packet according to receiving in monitoring time the last period at first quantities received and processed packet in first treating capacity, determine the implementation of the processing speed of the one or more monitoring windows in current monitoring time, all should be within the scope of the present invention.
Then, in step s 2, synchronizer adds up the quantities received of the packet received in current monitoring time and the treating capacity of processed packet, to determine the processing speed of partly or entirely monitoring window in next section of monitoring time based on described current quantities received and described current treating capacity.
Wherein, described step S2 comprise further step S201(figure do not show) and step S202(scheme do not show).
In step s 201, synchronizer obtains the window reception amount sum of each monitoring window difference correspondence in described monitoring time, as the quantities received of the packet in monitoring time described in this.
Preferably, the quantities received of the packet in described monitoring time added up by synchronizer based on following formula:
Wherein, Nr represents the quantities received of the packet in monitoring time, Δ P
receivedi () represents the window reception amount of the packet of i-th monitoring window reception, N represents the number of the monitoring window comprised in monitoring time.
In step S202, synchronizer obtains the window treatments amount sum of each monitoring window difference correspondence in described current monitoring time, as the treating capacity of the packet in monitoring time current described in this.
Preferably, the treating capacity of the packet in described monitoring time added up by synchronizer based on following formula:
Wherein, N
prepresent the treating capacity of the packet in monitoring time, Δ P
processedi () represents the window treatments amount of the packet that i-th monitoring window is processed, N represents the number of the monitoring window comprised in monitoring time.
It should be noted that, synchronizer determines with synchronizer, the mode of the processing speed of partly or entirely monitoring window in next section of monitoring time determines that the mode of the processing speed of the one or more monitoring windows in current monitoring time is identical in step sl, namely synchronizer is after execution of step S2, using current sensing time as monitoring time the last period, using the treating capacity in current monitoring time obtained in step s 2 and quantities received as in first treating capacity with at first quantities received, and using next section of monitoring time as current monitoring time, with repeated execution of steps S1 and step S2 in the current sensing time that this is new.
Continue to be described foregoing First example, the number N=1024 of the monitoring window comprised in monitoring time, synchronizer is based on formula (1) and formula (2), statistics obtains the quantities received Nr=20006 of the packet received in current monitoring time, the treating capacity Np=20000 of processed packet.
It should be noted that, above-mentioned citing is only and technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, the implementation of the quantities received of the packet received in the current monitoring time of any statistics and the treating capacity of processed packet, all should be within the scope of the present invention.
Preferably, according to method of the present invention also comprise step S3(figure do not show), step S4(figure do not show), step S5(figure do not show) and step S6(scheme do not show).
In step s3, synchronizer, according to the quantities received of packet in one or more monitoring time and treating capacity, determines the phase difference between the clock information of the transmitting apparatus that each monitoring time is corresponding respectively and the clock information for the treatment of facility.
Preferably, for determining that one or more monitoring times of described phase difference comprise the one or more Historical Monitoring times before current monitoring time.
Preferably, synchronizer can calculate described phase difference based on following formula.
Wherein, Phase represents phase difference, N
prepresent the treating capacity of the packet in monitoring time, N
rrepresent the quantities received of the packet in monitoring time.
In step s 4 which, synchronizer, according to the maximum in phase difference corresponding to each monitoring time, determines the difference on the frequency threshold value between transmitting time and processing time.
Preferably, difference on the frequency threshold value determined between transmitting time and processing time based on formula (3) and following formula by synchronizer:
Wherein, Δ f represents difference on the frequency threshold value, and Max (Phase) represents the absolute value of the maximum of phase difference, and N represents the number of the monitoring window comprised in monitoring time.
Then, in step s 5, synchronizer, based on the described current quantities received in described current monitoring time and described current treating capacity, determines that the ongoing frequency of described current sensing time is poor.
Preferably, based on following formula, synchronizer determines that ongoing frequency is poor:
Wherein, Δ f
prepresent that ongoing frequency is poor, N
pprepresent the treating capacity in current monitoring time, N
rprepresent the quantities received in current monitoring time.
Then, in step s 6, when the absolute value of described ongoing frequency difference is greater than described difference on the frequency threshold value, synchronizer prompting warning message.
Continue to be described foregoing First example, synchronizer obtains the quantities received N of packet in current monitoring time in step s 2
rpbe 20006, and the treating capacity N of packet processed in current monitoring time
ppbe 20000.In step s3, synchronizer is according to the quantities received in multiple Historical Monitoring time and treating capacity, phase difference corresponding to this each Historical Monitoring time is calculated respectively based on formula (3), and determine that the absolute value of the maximum in obtained multiple phase differences is pi/2, then, synchronizer obtains difference on the frequency threshold value Δ f=1/(4 × N based on formula (4) in step s 4 which)=0.000244, and obtain ongoing frequency difference Δ f based on formula (5) in step s 5
p=(20000-20006)/20000=-0.0003, then synchronizer is according to |-0.0003| > 0.000244, determines that ongoing frequency difference is greater than difference on the frequency threshold value, and points out the warning message of network performance deteriorates.
It should be noted that, above-mentioned citing is only and technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, any phase difference determined between the clock information of the transmitting apparatus that each monitoring time is corresponding respectively and the clock information for the treatment of facility, and according to the maximum determination transmitting time of phase difference and the maximum frequency difference threshold value between the processing time and when time offset exceedes this maximum frequency difference threshold value, the implementation of prompting warning message, all should be within the scope of the present invention.
According to method of the present invention, by regulating packet processing speed in processing, the speed making transmitting apparatus (such as BBU) send data to treatment facility keeps synchronous with the speed for the treatment of facility (such as RRU) deal with data, thus the problem that the speed solving the transmitting apparatus transmission data that the clock drift between transmitting apparatus and treatment facility brings cannot match with the speed for the treatment of facility deal with data, decrease transmitting apparatus and send to treatment facility the impact that the transmission rate of data and treatment facility to send difference from the aerial speed of data to subscriber equipment brings.
Fig. 3 shows the structural representation according to a kind of synchronizer for realizing clock synchronous in the treatment facility of wireless access network of the present invention.Synchronizer according to the present invention comprises the first determining device 1 and statistic device 2.
With reference to Fig. 3, the first determining device 1 according to the packet received in monitoring time the last period at first quantities received and processed packet in first treating capacity, determine the processing speed of the one or more monitoring windows in current monitoring time.
Wherein, described monitoring time comprises at least one monitoring window, and described monitoring window comprises one or more time interval.
Wherein, can be continuous print between each section of monitoring time, or, can interval scheduled duration between each section of monitoring time, such as, interval 1 second etc. between each section of monitoring time.
Preferably, determine the mode of the size of described monitoring window include but not limited to following any one:
1) determine based on self-defined configuration;
2) determine based on practical experience hard coded;
3) determine after carrying out Automatic adjusument according to the network model of PTN.
Preferably, determine the mode of the number in the time interval comprised in monitoring time and aforementionedly determine that the mode of the size of described monitoring window is same or similar, repeating no more herein.
Preferably, determine the mode of the number in the time interval comprised in each monitoring window in monitoring time and aforementionedly determine that the mode of the size of described monitoring window is same or similar, repeating no more herein.
Preferably, described first determining device 1 comprises the first adjusting device (not shown) and the second adjusting device (not shown) further.
Wherein, when described first quantities received be greater than described in first treating capacity time, first adjusting device based on the described window treatments amount increasing the one or more monitoring windows in current monitoring time at first quantities received and the described difference in first treating capacity, to accelerate the processing speed of packet;
Wherein, when described first quantities received be less than described in first treating capacity time, second adjusting device based on the described window treatments amount reducing the one or more monitoring windows in current monitoring time at first quantities received and the described difference in first treating capacity, to reduce the processing speed of packet.
Preferably, described step S1 also comprises choice device (not shown).
Wherein, choice device selects one or more monitoring window according to described in first quantities received and the described difference in first treating capacity from described monitoring time, to adjust the processing speed of the packet of described one or more monitoring window.
Preferably, the number of the monitoring window selected by choice device is directly proportional to the absolute value of described difference.
More preferably, when at first quantities received with when the difference of first treating capacity is less, choice device selects a monitoring window to adjust the processing speed of the packet of this monitoring window from monitoring time, when at first quantities received with when the difference of first treating capacity is larger, choice device selects more than one monitoring window to adjust the processing speed of the packet of this more than one monitoring window from monitoring time.
Preferably, the amplitude of accommodation of window treatments speed is directly proportional to the absolute value of described difference.Such as, based on difference relative to the percentage in first treating capacity, the processing speed of selected one or more monitoring windows is increased or reduces corresponding percentage etc.
More preferably, directly using the regulated value of described difference as the processing speed of monitoring window.
According to the first example of the present invention, in IroPTN system, described monitoring time comprises 1024 monitoring windows, and each window treatments amount of monitoring window initial is 20.The packet 20029 from BBU that synchronizer in RRU received in monitoring time in the last period, and determine that packet processed in RRU is 20027, the first determining device 1 then in RRU according to this at first quantities received 20029 with in first treating capacity 20027, determine that both differences are 2, then the first adjusting device is using difference as recruitment, and the window treatments amount of first monitoring window in current monitoring time preselected for choice device is increased to 22.
It should be noted that, above-mentioned citing is only and technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, any packet according to receiving in monitoring time the last period at first quantities received and processed packet in first treating capacity, determine the implementation of the processing speed of the one or more monitoring windows in current monitoring time, all should be within the scope of the present invention.
Then, statistic device 2 adds up the quantities received of the packet received in current monitoring time and the treating capacity of processed packet, to determine the processing speed of partly or entirely monitoring window in next section of monitoring time based on described current quantities received and described current treating capacity.
Wherein, described statistic device 2 comprises the first acquisition device (not shown) and the second acquisition device (not shown) further.
First acquisition device obtains the window reception amount sum of each monitoring window difference correspondence in described monitoring time, as the quantities received of the packet in monitoring time described in this.
Preferably, the first acquisition device adds up the quantities received of the packet in described monitoring time based on following formula:
Wherein, N
rrepresent the quantities received of the packet in monitoring time, Δ P
receivedi () represents the window reception amount of the packet of i-th monitoring window reception, N represents the number of the monitoring window comprised in monitoring time.
Second acquisition device obtains the window treatments amount sum of each monitoring window difference correspondence in described current monitoring time, as the treating capacity of the packet in monitoring time current described in this.
Preferably, the second acquisition device adds up the treating capacity of the packet in described monitoring time based on following formula:
Wherein, N
prepresent the treating capacity of the packet in monitoring time, Δ P
processedi () represents the window treatments amount of the packet that i-th monitoring window is processed, N represents the number of the monitoring window comprised in monitoring time.
It should be noted that, synchronizer determines with the first determining device 1, the mode of the processing speed of partly or entirely monitoring window in next section of monitoring time determines that the mode of the processing speed of the one or more monitoring windows in current monitoring time is identical, namely statistic device 2 is after the operation executing the quantities received of packet and the treating capacity of processed packet received in the current monitoring time of statistics, synchronizer using current sensing time as monitoring time the last period, treating capacity in the current monitoring time obtained by statistic device 2 and quantities received are as in first treating capacity with at first quantities received, and using next section of monitoring time as current monitoring time, determine that the operation of the processing speed of the one or more monitoring windows in current monitoring time and statistic device 2 add up the operation of the quantities received of the packet received in current monitoring time and the treating capacity of processed packet to repeat the first determining device 1 in the current sensing time that this is new.
Continue to be described foregoing First example, the number N=1024 of the monitoring window comprised in monitoring time, first acquisition device gets the quantities received Nr=20006 of the packet received in current monitoring time based on formula (1), and the second acquisition device gets the treating capacity Np=20000 of packet processed in current monitoring time based on formula (2).
It should be noted that, above-mentioned citing is only and technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, the implementation of the quantities received of the packet received in the current monitoring time of any statistics and the treating capacity of processed packet, all should be within the scope of the present invention.
Preferably, the second determining device (not shown), the 3rd determining device (not shown), calculation element (not shown) and suggestion device (not shown) is also comprised according to method of the present invention.
Second determining device, according to the quantities received of packet in one or more monitoring time and treating capacity, determines the phase difference between the clock information of the transmitting apparatus that each monitoring time is corresponding respectively and the clock information for the treatment of facility.
Preferably, for determining that one or more monitoring times of described phase difference comprise the one or more Historical Monitoring times before current monitoring time.
Preferably, the second determining device can calculate described phase difference based on following formula.
Wherein, Phase represents phase difference, N
prepresent the treating capacity of the packet in monitoring time, N
rrepresent the quantities received of the packet in monitoring time.
3rd determining device, according to the maximum in phase difference corresponding to each monitoring time, determines the difference on the frequency threshold value between transmitting time and processing time.
Preferably, the 3rd determining device determines between transmitting time and processing time based on formula (3) and following formula difference on the frequency threshold value:
Wherein, Δ f represents difference on the frequency threshold value, and Max (Phase) represents the absolute value of the maximum of phase difference, and N represents the number of the monitoring window comprised in monitoring time.
Then, calculation element, based on the described current quantities received in described current monitoring time and described current treating capacity, determines that the ongoing frequency of described current sensing time is poor.
Preferably, based on following formula, calculation element determines that ongoing frequency is poor:
Wherein, Δ f
prepresent that ongoing frequency is poor, N
pprepresent the treating capacity in current monitoring time, N
rprepresent the quantities received in current monitoring time.
Then, when the absolute value of described ongoing frequency difference is greater than described difference on the frequency threshold value, suggestion device prompting warning message.
Continue to be described foregoing First example, the first acquisition device obtains the quantities received N of packet in current monitoring time
rpbe the treating capacity N that the 20006, second acquisition device obtains packet processed in current monitoring time
ppbe 20000.Second determining device is according to the quantities received in multiple Historical Monitoring time and treating capacity, phase difference corresponding to this each Historical Monitoring time is calculated respectively based on formula (3), and determine that the absolute value of the maximum in obtained multiple phase differences is pi/2, then, 3rd determining device obtains difference on the frequency threshold value Δ f=1/(4 × N based on formula (4))=0.000244, further, calculation element obtains ongoing frequency difference Δ f based on formula (5)
p=(20000-20006)/20000=-0.0003, then suggestion device is according to |-0.0003| > 0.000244, determines that ongoing frequency difference is greater than difference on the frequency threshold value, and points out the warning message of network performance deteriorates.
It should be noted that, above-mentioned citing is only and technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, any phase difference determined between the clock information of the transmitting apparatus that each monitoring time is corresponding respectively and the clock information for the treatment of facility, and according to the maximum determination transmitting time of phase difference and the maximum frequency difference threshold value between the processing time and when time offset exceedes this maximum frequency difference threshold value, the implementation of prompting warning message, all should be within the scope of the present invention.
According to the solution of the present invention, by regulating packet processing speed in processing, the speed making transmitting apparatus (such as BBU) send data to treatment facility keeps synchronous with the speed for the treatment of facility (such as RRU) deal with data, thus the problem that the speed solving the transmitting apparatus transmission data that the clock drift between transmitting apparatus and treatment facility brings cannot match with the speed for the treatment of facility deal with data, decrease transmitting apparatus and send to treatment facility the impact that the transmission rate of data and treatment facility to send difference from the aerial speed of data to subscriber equipment brings.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.Any Reference numeral in claim should be considered as the claim involved by limiting.In addition, obviously " comprising " one word do not get rid of other unit or step, odd number does not get rid of plural number.Multiple unit of stating in system claims or device also can be realized by software or hardware by a unit or device.First, second word such as grade is used for representing title, and does not represent any specific order.
Claims (15)
1. for realizing a method for clock synchronous in the treatment facility of wireless access network, wherein, treatment facility is every the packet of reception of the identical time interval from transmitting apparatus, and, every the same time interval, packet is processed, wherein, said method comprising the steps of:
A according to the packet received in monitoring time the last period at first quantities received and processed packet in first treating capacity, determine the processing speed of the one or more monitoring windows in current monitoring time; Wherein, described monitoring time comprises at least one monitoring window, and described monitoring window comprises one or more time interval;
B adds up the quantities received of the packet received in current monitoring time and the treating capacity of processed packet, to determine the processing speed of partly or entirely monitoring window in next section of monitoring time based on described current quantities received and described current treating capacity.
2. method according to claim 1, wherein, described step b comprises the following steps:
-each monitoring window obtained in described current monitoring time distinguishes corresponding window reception amount sum, as the quantities received of the packet in monitoring time current described in this;
-each monitoring window obtained in described current monitoring time distinguishes corresponding window treatments amount sum, as the treating capacity of the packet in monitoring time current described in this.
3. method according to claim 1 and 2, wherein, described step a comprises the following steps:
-when described first quantities received be greater than described in first treating capacity time, based on the described window treatments amount increasing the one or more monitoring windows in current monitoring time at first quantities received and the described difference in first treating capacity, to accelerate the processing speed of packet;
-when described first quantities received be less than described in first treating capacity time, based on the described window treatments amount reducing the one or more monitoring windows in current monitoring time at first quantities received and the described difference in first treating capacity, to reduce the processing speed of packet.
4. according to the method in any one of claims 1 to 3, wherein, described step a is further comprising the steps of:
-from described monitoring time, select one or more monitoring window according to described in first quantities received and the described difference in first treating capacity, to adjust the processing speed of the packet of described one or more monitoring window.
5. method according to any one of claim 1 to 4, wherein, described method is further comprising the steps of:
-according to the quantities received of packet in one or more monitoring time and treating capacity, determine the phase difference between the clock information of the transmitting apparatus that each monitoring time is corresponding respectively and the clock information for the treatment of facility;
-according to the maximum in phase difference corresponding to each monitoring time, determine the difference on the frequency threshold value between transmitting time and processing time;
-based on the described current quantities received in described current monitoring time and described current treating capacity, determine that the ongoing frequency of described current sensing time is poor;
-when the absolute value of described ongoing frequency difference is greater than described difference on the frequency threshold value, prompting warning message.
6. method according to any one of claim 1 to 4, wherein, described dispensing device comprises BBU, and described processing unit comprises RRU.
7. method according to any one of claim 1 to 4, wherein, described dispensing device comprises RRU, and described processing unit comprises BBU.
8. for realizing a synchronizer for clock synchronous in the treatment facility of wireless access network, wherein, treatment facility is every the packet of reception of the identical time interval from transmitting apparatus, and, process packet every the same time interval, wherein, described synchronizer comprises:
First determining device, for the packet that receives in monitoring time according to the last period at first quantities received and processed packet in first treating capacity, determine the processing speed of the one or more monitoring windows in current monitoring time; Wherein, described monitoring time comprises at least one monitoring window, and described monitoring window comprises one or more time interval;
Statistic device, for the treating capacity of the quantities received and processed packet of adding up the packet received in current monitoring time, to determine the processing speed of partly or entirely monitoring window in next section of monitoring time based on described current quantities received and described current treating capacity.
9. synchronizer according to claim 8, wherein, described statistic device comprises:
First acquisition device, for obtaining the window reception amount sum of each monitoring window difference correspondence in described current monitoring time, as the quantities received of the packet in monitoring time current described in this;
Second acquisition device, for obtaining the window treatments amount sum of each monitoring window difference correspondence in described current monitoring time, as the treating capacity of the packet in monitoring time current described in this.
10. synchronizer according to claim 8 or claim 9, wherein, described first determining device comprises:
First adjusting device, for when described first quantities received be greater than described in first treating capacity time, based on the described window treatments amount increasing the one or more monitoring windows in current monitoring time at first quantities received and the described difference in first treating capacity, to accelerate the processing speed of packet;
Second adjusting device, for when described first quantities received be less than described in first treating capacity time, based on the described window treatments amount reducing the one or more monitoring windows in current monitoring time at first quantities received and the described difference in first treating capacity, to reduce the processing speed of packet.
Synchronizer according to any one of 11. according to Claim 8 to 10, wherein, described first determining device also comprises:
Choice device, for selecting one or more monitoring window according to described in first quantities received and the described difference in first treating capacity from described monitoring time, to adjust the processing speed of the packet of described one or more monitoring window.
Synchronizer according to any one of 12. according to Claim 8 to 11, wherein, described synchronizer also comprises:
Second determining device, for according to the quantities received of packet in one or more monitoring time and treating capacity, determines the phase difference between the clock information of the transmitting apparatus that each monitoring time is corresponding respectively and the clock information for the treatment of facility;
3rd determining device, for according to the maximum in phase difference corresponding to each monitoring time, determines the difference on the frequency threshold value between described transmitting time and described processing time;
Calculation element, for based on the described current quantities received in described current monitoring time and described current treating capacity, determines that the ongoing frequency of described current sensing time is poor;
Suggestion device, for when the absolute value of described ongoing frequency difference is greater than described difference on the frequency threshold value, prompting warning message.
13. 1 kinds of baseband processing units (BBU), wherein, described BBU comprises the synchronizer in claim 8 to 12 at least described in any one.
14. 1 kinds of Remote Radio Unit (RRU), wherein, described RRU comprises the synchronizer in claim 8 to 12 at least described in any one.
15. 1 kinds of base stations, wherein, described base station comprises BBU as claimed in claim 13 and/or RRU as claimed in claim 14.
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