CN102905295A - Method and device for regulating preamble sequence numbers - Google Patents
Method and device for regulating preamble sequence numbers Download PDFInfo
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- CN102905295A CN102905295A CN2012103939366A CN201210393936A CN102905295A CN 102905295 A CN102905295 A CN 102905295A CN 2012103939366 A CN2012103939366 A CN 2012103939366A CN 201210393936 A CN201210393936 A CN 201210393936A CN 102905295 A CN102905295 A CN 102905295A
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Abstract
The invention discloses a method for regulating preamble sequence numbers. The method comprises the following steps of: accounting cut-in request rate and call arrival rate within set time; calculating according to the obtained cut-in request rate and preset average cut-over time so as to obtain cut-in telephone traffic arising from the cut-over, and obtaining a first ideal value according to the cut-in telephone traffic; obtaining a second ideal value according to the obtained call arrival rate; calculating a first target value and a second target value according to the obtained first ideal value and the obtained second ideal value; and respectively regulating the preamble sequence numbers, contained in a first set and a second set, to the first target value and the second target value. Thus, the distribution situations of the preamble sequence sets can be regulated in a timely manner according to the real-time change of network environments, so that the probability of the occurrence of preamble conflict in a system is obviously reduced, and the time delay of the system is effectively reduced. The invention simultaneously discloses a corresponding base station.
Description
Technical field
The application relates to communication system, particularly a kind of adjustment preamble sequence number purpose method and device
Background technology
In existing Long Term Evolution (Long Term Evolution, LTE) system, end side uses Physical Random Access Channel (Physical Random Access Channel, PRACH) to initiate random access procedure to network side, to set up up link.In this process, an operable targeting sequencing of PRACH channel (preamble sequence) set can be divided into following two classes:
The first kind is used for the random access procedure of uncontested type, is called the dedicated group.
Equations of The Second Kind is used for the random access procedure of state of conflict, is called the random group.
In system information, the number of the preamble sequence that comprises in the operation parameter numberOfRA-Preambles indication random group.
And the random group is further divided into respectively group A group and group B group, wherein, preamble sequence in the group A group is applicable to the situation that message-length is less or path loss is larger in the state of conflict random access procedure, and the preamble sequence in the group B group is applicable to the large and less situation of path loss of message-length in the state of conflict random access procedure.
In system information, the number of the preamble sequence that comprises in the operation parameter sizeOfRA-PreamblesGroupA indication group A group
Under the technology, the quantity N of an interior operable preamble sequence of PRACH channel is defined by related specifications now, and concrete numerical value is 64, i.e. N=64; So, the preamble sequence during the interior dedicated group of using of PRACH channel, group A group and a group B organize is all divided in these 64 preamble sequences.At present, the division of the preamble sequence in each PRACH channel, normally adopt special-purpose Planning Tool to carry out pre-configured in the network planning stage by administrative staff, and in network operation process, reconfigured by the division of manual mode to the preamble sequence in each PRACH channel according to network operation situation by administrative staff, this need to consume a large amount of time and manpower, has increased greatly the network operation cost; On the other hand, the mode of manually adjusting too relies on administrative staff's personal experience and judgement, and randomness is larger, makes mistakes easily, is difficult to obtain optimum splitting scheme, thereby has had a strong impact on the service quality of network operation.For example, if it is very few to be divided to the preamble sequence quantity of dedicated group, then can when UE carries out the minizone switching, increase handover delay; And if the preamble sequence quantity that is divided to the dedicated group is too much, then can increases the collision probability of state of conflict random access procedure, thereby increase the time delay of state of conflict random access procedure.Furthermore, again for example, in the random group, if it is unreasonable to be divided to the preamble sequence quantity of group A group and group B group, it is unbalanced then can to cause falling into the interior random access request of two groups, thereby increase the collision probability of state of conflict random access procedure, and then increase the time delay of state of conflict random access procedure.
Therefore, need to provide a kind of distribution method of new preamble sequence, so that the preamble sequence in each PRACH channel obtains classifying rationally.
Summary of the invention
The embodiment of the present application provides a kind of adjustment preamble sequence number purpose method and device, is used for according to the network operation situation, in real time the preamble sequence of using in each PRACH channel is carried out classifying rationally.
The concrete technical scheme that the embodiment of the present application provides is as follows:
A kind of method of adjusting the preamble sequence number comprises:
Statistics is set incision request rate and the rate of arriving calls in the duration;
Obtain switching the incision telephone traffic of generation according to the incision request rate that obtains and default average switching duration calculation, and obtaining to be used for preamble sequence number purpose the first ideal value that expression is divided to the first set according to this incision telephone traffic, described the first set-inclusion is used for the preamble sequence of non-competitive random access procedure;
Obtain to be used for the preamble sequence number purpose secondary ideal value that expression is divided to the second set according to the rate of arriving calls that obtains, comprise the preamble sequence for the state of conflict random access procedure in described the second set;
Calculate the preamble sequence number purpose first object value that is divided to the first set for expression according to the first ideal value that obtains and secondary ideal value, and be used for preamble sequence number purpose the second desired value that expression is divided to the second set;
The preamble sequence number that comprises in described the first set and the second set is adjusted into respectively described first object value and the second desired value.
A kind of base station comprises:
Statistic unit is used for statistics and sets duration interior incision request rate and rate of arriving calls;
Arithmetic element, be used for obtaining switching the incision telephone traffic of generation according to the incision request rate that obtains and default average switching duration calculation, and obtain to be used for preamble sequence number purpose the first ideal value that expression is divided to the first set according to this incision telephone traffic, and the preamble sequence number purpose secondary ideal value that obtains to be used for representing to be divided to the second set according to the rate of arriving calls that obtains, calculate the preamble sequence number purpose first object value that is divided to the first set for expression according to the first ideal value that obtains and secondary ideal value again, with preamble sequence number purpose the second desired value that is used for representing to be divided to the second set, wherein, described the first set-inclusion is used for the preamble sequence of non-competitive random access procedure, comprises the preamble sequence for the state of conflict random access procedure in described the second set;
Adjustment unit, the preamble sequence number that is used for comprising in described the first set and the second set is adjusted into respectively described first object value and the second desired value;
Communication unit is used for the adjustment result of adjustment unit is broadcasted to end side.
A kind of method of adjusting the preamble sequence number comprises:
Statistics is set incision request rate and the rate of arriving calls in the duration;
Obtain switching the incision telephone traffic of generation according to the incision request rate that obtains and default average switching duration calculation, and obtain to be used for preamble sequence number purpose the first ideal value that expression is divided to the first set according to this incision telephone traffic, described the first set-inclusion is used for the preamble sequence of non-competitive random access procedure, and is described
Obtain to be used for the preamble sequence number purpose secondary ideal value that expression is divided to the second set according to the rate of arriving calls that obtains, comprise the preamble sequence for the state of conflict random access procedure in described the second set;
Calculate the preamble sequence number purpose first object value that is divided to the first set for expression according to the first ideal value that obtains and secondary ideal value, and be used for preamble sequence number purpose the second desired value that expression is divided to the second set;
The preamble sequence number that comprises in described the first set and the second set is adjusted into respectively described first object value and the second desired value;
To adjust the result broadcasts to end side.
Use technique scheme, can be according to the real-time change of network environment, in time the distribution condition of preamble arrangement set is adjusted, thereby obviously reduced the probability that the preamble conflict occurs in the system, effectively reduced Time Delay of Systems, and then promoted network service quality, also reduced the network operation maintenance cost simultaneously.
Description of drawings
Fig. 1 is LTE Solution Architecture figure in the embodiment of the present application;
Fig. 2 is base station functions structural representation in the embodiment of the present application;
Fig. 3 adjusts flow chart to the preamble sequence number that comprises in dedicated group and the random group in the embodiment of the present application;
Fig. 4 is the first method flow chart of in the embodiment of the present application the preamble sequence number that comprises in the group A group in the random group and the group B group being adjusted;
Fig. 5 is the second method flow chart of in the embodiment of the present application the preamble sequence number that comprises in the group A group in the random group and the group B group being adjusted;
Fig. 6 is the second method flow chart of in the embodiment of the present application the preamble sequence number that comprises in the group A group in the random group and the group B group being adjusted.
Embodiment
In the LTE system, in order to carry out classifying rationally to the preamble sequence of using in each PRACH channel in real time according to the network operation situation, the embodiment of the present application provides a kind of implementation method,
Statistics is set incision request rate and the rate of arriving calls in the duration; Obtain switching the incision telephone traffic of generation according to the incision request rate that obtains and default average switching duration calculation, and obtain to be used for preamble sequence number purpose the first ideal value that expression is divided to the first set according to this incision telephone traffic, described the first set-inclusion is used for the preamble sequence of non-competitive random access procedure, obtain to be used for the preamble sequence number purpose secondary ideal value that expression is divided to the second set according to the rate of arriving calls that obtains, comprise the preamble sequence for the state of conflict random access procedure in described the second set; Calculate the preamble sequence number purpose first object value that is divided to the first set for expression according to the first ideal value that obtains and secondary ideal value, and be used for preamble sequence number purpose the second desired value that expression is divided to the second set; The preamble sequence number that comprises in described the first set and the second set is adjusted into respectively described first object value and the second desired value.
Below in conjunction with accompanying drawing the preferred embodiment of the present invention is elaborated.
Consult the shown in Figure 2 of Fig. 1, in the present embodiment, comprise a plurality of base stations 10 and a plurality of terminal 11 in the LTE system, wherein, base station 10 comprises statistic unit 101, arithmetic element 102, adjustment unit 103 and communication unit 104, wherein,
Based on the said system framework, in the present embodiment, suppose each PRACH channel in the residential quarter can with the total quantity of preamble sequence be N, wherein, the quantity that belongs to the preamble sequence of dedicated group is that the quantity that N1 belongs to the preamble sequence of random group is N2, N=N1+N2;
Consult the preamble sequence number that Figure 3 shows that comprising in dedicated group and the random group and adjust flow chart.Base station 10 is according to the statistical information of service request, and is as follows to belonging to the detailed process that dedicated organizes and the quantity of the preamble sequence of random group is adjusted respectively:
Step 300: the statistics timer zero setting that will arrange in the present embodiment, describes as an example of a statistics timer example.
Step 310: add up respectively terminal 11 in other residential quarters incision request rate r1 when switching to this residential quarter and the rate of arriving calls r2 during the 11 initiation access calling of the terminal in this residential quarter.
In the practical application, terminal 11 switches to 10 administration residential quarters, base station by other residential quarters, need to use the preamble sequence that belongs to the dedicated group, and terminal 11 is initiated the access request calling in 10 administration residential quarters, base station, then need to use the preamble sequence that belongs to the random group, therefore, the value of incision request rate r1 and rate of arriving calls r2 will affect the number of the preamble sequence in dedicated group and the random group.
Step 320: judge whether the statistics timer is overtime, if then execution in step 430; Otherwise, return step 310.
Step 330: calculate the incision telephone traffic Y that the incision flow process produces according to incision request rate r1 and the average duration T that switches, formula is Y=r1T.The average duration that switches can obtain by emulation, also can 10 sides add up in the base station.
Step 340: according to incision request rate r1 and default Irish call loss table, obtain to belong to the desirable preamble sequence quantity N10 of dedicated group under certain incision blocking probability; Wherein, Irish call loss is as shown in table 1:
Table 1
Step 350: obey Poisson distribution owing to call out to arrive, so, according to formula
Can calculate the desirable preamble sequence quantity N20 that need to belong to the random group: wherein, p is the preamble sequence collision probability of expectation, such as the preamble sequence total quantity of 1%, N for using in the default PRACH channel, the rate of arriving calls of r2 for obtaining.
Step 360: the reasonable value that calculates current N1 and N2 according to the N10 that obtains and N20, i.e. desired value.
In the present embodiment, adopt following formula when calculating N1 and N2:
N1=F(N * N10/(N10+N20)), N2=N-N1, F () expression rounds, and can use the multiple modes that rounds such as rounding up, round, round up downwards, then, enters step 370.
Step 370: the quantity of the preamble sequence that the current dedicated of belonging to group and random are organized is adjusted into the N1 that calculates and the desired value of N2, then returns step 300.
Based on above-described embodiment, in actual applications, Further Division is group A group and group B group in the random group, the quantity of supposing to belong to the preamble sequence of group group A is N21, and the quantity that belongs to the preamble sequence of group B group is N22, N2=N21+N22, so, consult shown in Figure 4ly, in the present embodiment, base station 10 equally can be according to the probability that detects up preamble sequence.As follows to belonging to the detailed process that group A organizes and the quantity of the preamble sequence of group B is adjusted respectively:
Step 400: the statistics timer zero setting that will arrange, each counter zero setting is provided with a statistics timer, and two counters below are called counter 3 sum counters 4.
Step 410: network environment is carried out uplink synchronous detect, obtain testing result.
Step 420: judge whether to exist the access of preamble sequence according to the testing result that obtains? if then carry out step 430; Otherwise, return step 410.
Step 430: the preamble sequence of judging current access belongs to group A group or group B group, if belong to group A group, then execution in step 440; If belong to group B group, then execution in step 450.
Step 440: counter 3 is added C3, and wherein, C3 is the detected preamble Serial relation peak number that belongs to group A group greater than detection threshold, then, and execution in step 460.
Step 450: counter 4 is added C4, and wherein, C4 is the relevant peaks number of the detected preamble sequence that belongs to group B group greater than detection threshold, then, and execution in step 460.
Step 460: judge whether the statistics timer is overtime, if then carry out step 470; Otherwise return step 410.
Step 470: according to the cumulative data of the accumulation numerical value sum counter 4 of counter 3, calculate the reasonable value of current N21 and N22.
In the present embodiment, adopt following formula when calculating N21 and N22:
The accumulation numerical value of N21=F(N2 * counter 3/(the accumulation numerical value of the accumulation numerical value+counter 4 of counter 3)), N22=N2-N21; Wherein, F () expression rounds, and can use the multiple modes that rounds such as rounding up, round, round up downwards, does not repeat them here.
Step 480: the current quantity that belongs to the preamble sequence of group A group and group B group is adjusted a N21 who obtains and the desired value of N22, then return step 400.
In the practical application, the value of above-mentioned N21, N22 also can be adjusted according to the preamble sequence that belongs to group A group and the collision probability of the preamble sequence that belongs to group B group in base station 10, by adjusting the value of N21 and N22, so that it is about the same to belong to respectively the probability that group A organizes and the preamble sequence of group B group clashes.Consult shown in Figure 5ly, its detailed process is as follows:
Step 500: the statistics timer zero setting that will arrange.
Step 510: statistics belongs to the number of times P2 that the number of times P1 that the preamble sequence of group A group clashes and the preamble sequence that belongs to group B clash respectively.
In the practical application, judge that the method that the conflict of preamble sequence occurs has a lot, including but not limited to: statistics is higher than the relevant peaks quantity of detection threshold to determine to occur the generation of preamble sequence conflict; Perhaps, judge that the outer relevant peaks power of signal window conflicts to determine generation preamble sequence, etc., repeat no more here.
Step 520: judge whether the statistics timer is overtime, if then execution in step 530; Otherwise return step 510.
Step 530: whether judge P1/N21 ' greater than P2/N22 ', i.e. P1/N21 '〉P2/N22 '? wherein, N21 ' and N22 ' are respectively the quantity of the preamble sequence of the current group of belonging to A group and group B group; If, then show the probability that probability that the preamble sequence in the group A group clashes clashes greater than the preamble sequence in the group B group, so, execution in step 540; Otherwise, showing the probability that probability that the preamble sequence in the group B group clashes clashes greater than the preamble sequence in the group A group, execution in step 560 so.
Step 540: judge P1/ (N21 '+delta) whether more than or equal to P2/ (N22-delta), namely P1/ (N21 '+delta) 〉=P2/ (N22 '-delta)? wherein, delta is default fixed step size value; If, can not cause vibration after then showing adjustment, so, execution in step 550, otherwise, the value of current N21 ' and N22 ' is not adjusted, directly return step 500
Step 550:N21=N21 '+delta, N22=N22 '-delta, then, execution in step 580.
Step 560: judge P1/ (N21 '-delta) whether less than or equal to P2/ (N22 '+delta), namely P1/ (N21 '-delta)≤P2/ (N22 '+delta)? wherein, delta is default fixed step size value; If, can not cause vibration after then showing adjustment, so, execution in step 570; Otherwise, the value of current N21 ' and N22 ' is not adjusted, directly return step 500.
Step 570:N21=N21 '-delta, N22=N22 '+delta, then execution in step 580.
Step 580: the quantity of the preamble sequence that the current group of belonging to A group and group B are organized is adjusted into respectively N21 and N22, then returns step 500.
In the practical application, above-mentioned steps 530～580 can use following step 630～670 to replace.Consult shown in Figure 6ly, its detailed process is as follows:
Step 600: the statistics timer zero setting that will arrange.
Step 610: statistics belongs to the number of times P2 that the number of times P1 that the preamble sequence of group A group clashes and the preamble sequence that belongs to group B clash respectively.
In the practical application, judge that the method that the conflict of preamble sequence occurs has a lot, including but not limited to: statistics is higher than the relevant peaks quantity of detection threshold to determine to occur the generation of preamble sequence conflict; Perhaps, judge that the outer relevant peaks power of signal window conflicts to determine generation preamble sequence, etc., repeat no more here.
Step 620: judge whether the statistics timer is overtime, if then execution in step 630; Otherwise return step 610.
Step 630: judge that whether P1/N21 ' is greater than P2/N22 '+Thre1, be P1/N21 '〉P2/N22 '+Thre1? wherein, N21 ' and N22 ' are respectively the quantity of the preamble sequence of the current group of belonging to A group and group B group, and Thre1 is the default excessive thresholding of judgement collision probability; If, then show the probability that probability that the preamble sequence that belongs to group A group clashes clashes much larger than the preamble sequence that belongs to group B group, so, execution in step 640; Otherwise, execution in step 650.
Step 640:N21=N21 '+delta, N22=N22 '-delta, wherein, delta is default fixed step size value, then, execution in step 670.
Step 650: whether judge P1/N21 ' less than P2/N22-Thre2, namely P1/N21 '＜P2/N22-Thre2 wherein, Thre2 is the default too small thresholding of judgement collision probability; If, then show the probability that probability that the preamble sequence that belongs to group B group clashes clashes much larger than the preamble sequence that belongs to group A group, so, execution in step 660; Otherwise, the value of current N21 ' and N22 ' is not adjusted, directly return step 600.
Step 660:N21=N21 '-delta, N22=N22 '+delta, then, execution in step 670;
Step 670: the quantity of the preamble sequence that the current group of belonging to A group and group B are organized is adjusted into N21 and N22, then returns step 600.
Pass through the various embodiments described above, the preamble sequence number that comprises in dedicated group after base station 10 will be adjusted and the random group is broadcasted to end side, and the preamble sequence number that comprises in group A group and group B organized broadcasts to end side, makes the end side could be according to the mistake behind the classifying rationally! It is invalid to link.Send upward signal, thereby effectively reduce the probability that the preamble conflict occurs in the system.
In the various embodiments described above, if operator allows, the adjustment of preamble arrangement set can be in the base station 10 side complete independentlies; Otherwise the base station need to report O﹠amp to recommended value; M is through O﹠amp; After the M approval, just carry out and adjust action, this recommended value can report to O﹠amp by northbound interface; M.
In sum, use above-mentioned each technical scheme of the embodiment of the present application record, can be according to the real-time change of network environment, in time the distribution condition of preamble arrangement set is adjusted, thereby obviously reduced the probability that the preamble conflict occurs in the system, effectively reduce Time Delay of Systems, and then promoted network service quality, also reduced the network operation maintenance cost simultaneously.
Obviously, those skilled in the art can carry out various changes and modification and the spirit and scope that do not break away from the application to the embodiment among the application.Like this, if these in the embodiment of the present application are revised and modification belongs within the scope of the application's claim and equivalent technologies thereof, then the embodiment among the application also is intended to comprise these changes and modification interior.
Claims (13)
1. a method of adjusting the targeting sequencing number is characterized in that, comprising:
Statistics is set incision request rate and the rate of arriving calls in the duration;
Obtain switching the incision telephone traffic of generation according to the incision request rate that obtains and default average switching duration calculation, and obtaining to be used for preamble sequence number purpose the first ideal value that expression is divided to the first set according to this incision telephone traffic, described the first set-inclusion is used for the preamble sequence of non-competitive random access procedure;
Obtain to be used for the preamble sequence number purpose secondary ideal value that expression is divided to the second set according to the rate of arriving calls that obtains, comprise the preamble sequence for the state of conflict random access procedure in described the second set;
Calculate the preamble sequence number purpose first object value that is divided to the first set for expression according to the first ideal value that obtains and secondary ideal value, and be used for preamble sequence number purpose the second desired value that expression is divided to the second set;
The preamble sequence number that comprises in described the first set and the second set is adjusted into respectively described first object value and the second desired value.
2. the method for claim 1 is characterized in that, after the preamble sequence number that comprises in described the first set and second is gathered is adjusted into respectively described first object value and the second desired value, comprising:
In setting duration, the preamble sequence that upward signal carries belongs to the 3rd cumulative number of the first subclass in the second set according to described testing result statistics, and belongs to the 4th cumulative number of the second subclass in the second set; Wherein, described the first subclass comprises the preamble sequence for first kind state of conflict random access procedure, comprises the preamble sequence for Equations of The Second Kind state of conflict random access procedure in described the second subclass;
According to described the 3rd cumulative number and the 4th cumulative number, calculate preamble sequence number purpose the 3rd desired value that is divided to the first subclass for expression, and be used for preamble sequence number purpose the 4th desired value that expression is divided to the second subclass;
To be adjusted into respectively described the 3rd desired value and the 4th desired value to the preamble sequence number that comprises in described the first subclass and the second subclass.
3. the method for claim 1 is characterized in that, after the preamble sequence number that comprises in described the first set and second is gathered is adjusted into respectively described first object value and the second desired value, comprising:
Statistics is set in the duration, currently belong to the 5th cumulative number that the preamble sequence of the first subclass clashes in described the second set, and the 6th cumulative number that clashes of the current preamble sequence that belongs to the second subclass in described the second set;
Calculate the first ratio, this first ratio is the current preamble sequence number purpose ratio that comprises in described the 5th cumulative number and described the first subclass;
Calculate the second ratio, this second ratio is the current preamble sequence number purpose ratio that comprises in described the 6th cumulative number and described the second subclass,
The first ratio and the second ratio are compared, and according to comparative result the preamble sequence number that comprises in described the first subclass and the second subclass is adjusted accordingly.
4. method as claimed in claim 3, it is characterized in that, when according to described comparative result the preamble sequence number that comprises in described the first subclass and the second subclass being adjusted, if described comparative result is: the first ratio is greater than the second ratio, then when definite adjustment behavior can not produce vibration, the current preamble sequence number that comprises in described the first subclass is increased a default adjusted value, simultaneously, with current default adjusted value of preamble sequence decreased number that comprises in described the second subclass.
5. method as claimed in claim 3, it is characterized in that, when according to described comparative result the preamble sequence number that comprises in described the first subclass and the second subclass being adjusted, if described comparative result is: the first ratio is not more than the second ratio, then when definite adjustment behavior can not produce vibration, with current default adjusted value of preamble sequence decreased number that comprises in described the first subclass, simultaneously, the current preamble sequence number that comprises in described the second subclass is increased a default adjusted value.
6. the method for claim 1 is characterized in that, after the preamble sequence number that comprises in described the first set and second is gathered is adjusted into respectively described first object value and the second desired value, comprising:
Statistics is set in the duration, currently belong to the 5th cumulative number that the preamble sequence of the first subclass clashes in described the second set, and the 6th cumulative number that clashes of the current preamble sequence that belongs to the second subclass in described the second set;
Calculate the 3rd ratio, the 3rd ratio is the current preamble sequence number purpose ratio that comprises in described the 5th cumulative number and described the first subclass;
Calculate the 4th ratio, the 4th ratio is described the 6th cumulative number, and the current preamble sequence number purpose ratio that comprises in described the second subclass;
The 3rd ratio and the 4th ratio are compared, and according to comparative result the preamble sequence number that comprises in described the first subclass and the second subclass is adjusted accordingly.
7. method as claimed in claim 6, it is characterized in that, when according to comparative result the preamble sequence number that comprises in described the first subclass and the second subclass being adjusted accordingly, if described comparative result is: the 3rd ratio is greater than the 4th ratio and default the first thresholding sum, then the current preamble sequence number that comprises in described the first subclass is increased a default adjusted value, simultaneously, with current default adjusted value of preamble sequence decreased number that comprises in described the second subclass.
8. method as claimed in claim 6, it is characterized in that, when according to comparative result the preamble sequence number that comprises in described the first subclass and the second subclass being adjusted accordingly, if described comparative result is: the 3rd ratio is poor less than the 4th ratio and default the second threshold value, then comprises:
Calculate the 5th ratio, the 5th ratio comprises described the 6th cumulative number, and the ratio of the difference of the interior current preamble sequence number that comprises of described the second subclass and default the second threshold value;
Described the 3rd ratio and described the 5th ratio are compared, when determining the 3rd ratio less than the 5th ratio, with current default adjusted value of preamble sequence decreased number that comprises in described the first subclass, simultaneously, the current preamble sequence number that comprises in described the second subclass is increased a default adjusted value.
9. a base station is characterized in that, comprising:
Statistic unit is used for statistics and sets duration interior incision request rate and rate of arriving calls;
Arithmetic element, be used for obtaining switching the incision telephone traffic of generation according to the incision request rate that obtains and default average switching duration calculation, and obtain to be used for preamble sequence number purpose the first ideal value that expression is divided to the first set according to this incision telephone traffic, and the preamble sequence number purpose secondary ideal value that obtains to be used for representing to be divided to the second set according to the rate of arriving calls that obtains, calculate the preamble sequence number purpose first object value that is divided to the first set for expression according to the first ideal value that obtains and secondary ideal value again, with preamble sequence number purpose the second desired value that is used for representing to be divided to the second set, wherein, described the first set-inclusion is used for the preamble sequence of non-competitive random access procedure, comprises the preamble sequence for the state of conflict random access procedure in described the second set;
Adjustment unit, the preamble sequence number that is used for comprising in described the first set and the second set is adjusted into respectively described first object value and the second desired value;
Communication unit is used for the adjustment result of adjustment unit is broadcasted to end side.
10. base station as claimed in claim 9, it is characterized in that, after described adjustment unit is adjusted into respectively described first object value and the second desired value with the preamble sequence number that comprises in described the first set and the second set, described statistic unit statistics is in setting duration, the preamble sequence that upward signal carries belongs to the 3rd cumulative number of the first subclass in the second set, and belongs to the 4th cumulative number of the second subclass in the second set; Wherein, described the first subclass comprises the preamble sequence for first kind state of conflict random access procedure, comprise the preamble sequence for Equations of The Second Kind state of conflict random access procedure in described the second subclass, described arithmetic element is according to described the 3rd cumulative number and the 4th cumulative number, calculate preamble sequence number purpose the 3rd desired value that is divided to the first subclass for expression, with preamble sequence number purpose the 4th desired value that is used for representing to be divided to the second subclass, described adjustment unit is adjusted into respectively described the 3rd desired value and the 4th desired value with the preamble sequence number that comprises in described the first subclass and the second subclass.
11. base station as claimed in claim 9, it is characterized in that, after described adjustment unit is adjusted into respectively described first object value and the second desired value with the preamble sequence number that comprises in described the first set and the second set, described statistic unit statistics is set in the duration, the 5th cumulative number that the current preamble sequence that belongs to the first subclass in described the second set clashes, and currently belong to the 6th cumulative number that the preamble sequence of the second subclass clashes in described the second set, described arithmetic element is calculated the first ratio and the second ratio, described the first ratio is the current preamble sequence number purpose ratio that comprises in described the 5th cumulative number and described the first subclass, described the second ratio is the current preamble sequence number purpose ratio that comprises in described the 6th cumulative number and described the second subclass, and the first ratio and the second ratio compared, described adjustment unit adjusts accordingly the preamble sequence number that comprises in described the first subclass and the second subclass according to comparative result.
12. base station as claimed in claim 9, it is characterized in that, after described adjustment unit is adjusted into respectively described first object value and the second desired value with the preamble sequence number that comprises in described the first set and the second set, described statistic unit statistics is set in the duration, the 5th cumulative number that the current preamble sequence that belongs to the first subclass in described the second set clashes, and currently belong to the 6th cumulative number that the preamble sequence of the second subclass clashes in described the second set, described arithmetic element is calculated the 3rd ratio and the 4th ratio, described the 3rd ratio is the current preamble sequence number purpose ratio that comprises in described the 5th cumulative number and described the first subclass, described the 4th ratio is described the 6th cumulative number, with the current preamble sequence number purpose ratio that comprises in described the second subclass, and the 3rd ratio and the 4th ratio compared, described adjustment unit adjusts accordingly the preamble sequence number that comprises in described the first subclass and the second subclass according to comparative result.
13. a method of adjusting the preamble sequence number is characterized in that, comprising:
Statistics is set incision request rate and the rate of arriving calls in the duration;
Obtain switching the incision telephone traffic of generation according to the incision request rate that obtains and default average switching duration calculation, and obtain to be used for preamble sequence number purpose the first ideal value that expression is divided to the first set according to this incision telephone traffic, described the first set-inclusion is used for the preamble sequence of non-competitive random access procedure, and is described
Obtain to be used for the preamble sequence number purpose secondary ideal value that expression is divided to the second set according to the rate of arriving calls that obtains, comprise the preamble sequence for the state of conflict random access procedure in described the second set;
Calculate the preamble sequence number purpose first object value that is divided to the first set for expression according to the first ideal value that obtains and secondary ideal value, and be used for preamble sequence number purpose the second desired value that expression is divided to the second set;
The preamble sequence number that comprises in described the first set and the second set is adjusted into respectively described first object value and the second desired value;
To adjust the result broadcasts to end side.
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