CN101808330B - Method and base station for adjusting density of PRACH (Physical Random Access Channels) - Google Patents
Method and base station for adjusting density of PRACH (Physical Random Access Channels) Download PDFInfo
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Abstract
The invention provides a method for adjusting the density of PRACH (Physical Random Access Channels). In the method, a base station acquires service strength information of a cell within a period T; the base station calculates the density L of the PRACH actually needed at present according to the acquired service strength information; the base station acquires the density N of the PRACH channel according to the density L of the PRACH actually needed at present; and the base station adjusts the density of the PRACH channel according to the acquired density N of the PRACH channel. In the invention, the configuration of the density of the PRACH is automatically adjusted according to the service strength information by the base station without manual participation, and the base station of the invention can adjust the density of the PRACH in real time according to the environmental variation, thereby better service quality and greater thuoughput are provided.
Description
Technical field
The present invention relates to communication technical field, particularly method and the base station of a kind of adjustment PRACH (PhysicalRandom Access Channel, Physical Random Access Channel) channel density.
Background technology
In LTE (Long-Term Evolution, Long Term Evolution) system, terminal uses the PRACH channel to initiate to insert at random, sets up up link.The PRACH channel need take certain uplink time.If the PRACH number is reserved too much, then can too seize the running time-frequency resource of Uplink Shared Channel, cause the reduction of total throughout; And if that the PRACH number is reserved is not enough, the collision of resource race to control causes inserting the reduction of success rate in the time of then can increasing terminal and initiate to insert at random.Therefore, the setting of PRACH channel density has important effect for the lifting of power system capacity and the assurance of system service quality, is an important configuration parameters of Operation ﹠ Maintenance System.Therefore how the density of reasonable disposition PRACH channel (being the number of PRACH channel in every 10ms) becomes key issue, to guarantee that not only inserting success rate reaches certain requirement, but also will make the density of PRACH channel as far as possible little, thereby reserve resource as much as possible for Uplink Shared Channel.
Configuration for the PRACH channel density in the prior art is undertaken by the deployment engineer, not only need to consider network planning result, also need to consider the prediction of community user quantity and service conditions, and also need deployment engineer's experience and individual intuition to a great extent.For example, covering radius is bigger, and the PRACH channel density is higher, and perhaps the community user number is more, and the PRACH channel density is higher, the professional initiation frequently, and the PRACH channel density is higher.
The shortcoming that prior art exists is, relies on manual operation fully for the configuration of PRACH channel density, and the Operation and Maintenance cost is very high, and too relies on personal experience and judgement, and randomness is bigger, is difficult for quantizing, and is wayward.The prediction of program results Network Based and community user quantity and service conditions is configured in addition, can cause configuration result inaccurate because community user quantity and service conditions forecasting inaccuracy are true.In addition, owing to be to think adjustment, therefore when environmental change, often can't in time adjust.
Summary of the invention
Purpose of the present invention is intended to solve at least one of above-mentioned technological deficiency, particularly solve in the prior art owing to rely on manual operation configuration PRACH signal density, and the cost that causes is high and dispose inaccurate defective.
For achieving the above object, one aspect of the present invention proposes a kind of method of adjusting Physical Random Access Channel PRACH channel density, may further comprise the steps: the base station obtains the traffic intensity information of this residential quarter in the period T; Described base station is according to the PRACH density L of the current actual needs of described traffic intensity information calculations that obtains; Described base station obtains described PRACH channel density N according to the PRACH density L of described current actual needs; Described base station is adjusted according to the PRACH channel density of PRACH channel density N of described acquisition.
As one embodiment of the present of invention, in described base station obtains period T before the traffic intensity information of this residential quarter, also comprise: the initial value of default PRACH density and statistic period T, and the initial value of described PRACH density and statistic period T is respectively medium value and smaller value.
As one embodiment of the present of invention, the traffic intensity information that described base station obtains this residential quarter in the period T comprises: described base station detection statistics obtains the traffic intensity information of this residential quarter in the period T; Perhaps, operation management O﹠amp; M is, and the service in base station strength information is added up, and the described traffic intensity information that will add up sends to described base station.
As one embodiment of the present of invention, described traffic intensity information comprises rate of arriving calls P1, incision request rate P2, uncontested preamble utilization rate P3, competes among preamble utilization rate P4 and the low speed competition preamble utilization rate P5 one or more at a high speed.
As one embodiment of the present of invention, described base station comprises according to the PRACH density L of the current actual needs of described traffic intensity information calculations that obtains: if described traffic intensity information comprises rate of arriving calls P1 and incision request rate P2, and switch the uncontested scheme of not using, then calculate the PRACH density L of current actual needs according to following formula
Wherein p is the collision probability requirement of PRACH; If described traffic intensity information comprises rate of arriving calls P1 and incision request rate P2, and switches the uncontested scheme of use, then calculate the PRACH density L of current actual needs according to following formula,
Wherein p is the collision probability requirement of PRACH, and (p is P2) at random inserting success rate less than the preamble number of p required configuration for assurance when incision request rate during for P2 for g; If described traffic intensity information comprises uncontested preamble utilization rate P3, competes preamble utilization rate P4 and low speed competition preamble utilization rate P5 at a high speed, then calculate the PRACH density L of current actual needs according to following formula,
Wherein p is the collision probability requirement of PRACH, and (p is P3) at random inserting success rate less than the preamble number of p required configuration for assurance when access request rate during for P3 for g.
As one embodiment of the present of invention, the described PRACH channel density N that obtains according to the PRACH density L of current actual needs satisfies N-1＜L≤N.
As one embodiment of the present of invention, also comprise: described base station reports to O﹠amp with the PRACH density N that obtains; M, and according to described O﹠amp; The feedback of M is adjusted PRACH density.
As one embodiment of the present of invention, also comprise: if the PRACH density L of current actual needs less than the minimum value of PRACH density N, perhaps greater than the maximum of PRACH density N, then report to the police to operator in described base station.
As one embodiment of the present of invention, also comprise: if the PRACH density N that described base station obtains is identical with original PRACH density, then described statistic period T is transferred big; If the PRACH density N that described base station obtains is different from original PRACH density, then do not adjust described statistic period T.
The present invention also proposes a kind of base station on the other hand, comprises traffic intensity information acquisition module, computing module, and channel density acquisition module and density adjusting module, described traffic intensity information acquisition module is for the traffic intensity information that obtains this residential quarter in the period T; Described computing module is used for the PRACH density L according to the current actual needs of described traffic intensity information calculations of described traffic intensity information acquisition module acquisition; Described channel density acquisition module, the PRACH density L that is used for the current actual needs that calculates according to described computing module obtains described PRACH channel density N; Described density adjusting module is used for adjusting according to the channel density of described PRACH channel density N that described channel density acquisition module obtains.
As one embodiment of the present of invention, also comprise the preservation module, be used for preserving the initial value of PRACH density and statistic period T, and the initial value of described PRACH density and statistic period T is respectively medium value and smaller value.
As one embodiment of the present of invention, described traffic intensity information comprises rate of arriving calls P1, incision request rate P2, uncontested preamble utilization rate P3, competes among preamble utilization rate P4 and the low speed competition preamble utilization rate P5 one or more at a high speed.
As one embodiment of the present of invention, the PRACH density L that described computing module calculates current actual needs according to described traffic intensity information and the following computing formula of acquisition: if described traffic intensity information comprises rate of arriving calls P1 and incision request rate P2, and switch the uncontested scheme that do not adopt, then calculate the PRACH density L of current actual needs according to following formula
Wherein p is the collision probability requirement of PRACH; If described traffic intensity information comprises rate of arriving calls P1 and incision request rate P2, and switches the uncontested scheme of use, then calculate the PRACH density L of current actual needs according to following formula,
Wherein p is the collision probability requirement of PRACH, and (p is P2) at random inserting success rate less than the preamble number of p required configuration for assurance when incision request rate during for P2 for g; If described traffic intensity information comprises uncontested preamble utilization rate P3, competes preamble utilization rate P4 and low speed competition preamble utilization rate P5 at a high speed, then calculate the PRACH density L of current actual needs according to following formula,
Wherein p is the collision probability requirement of PRACH, and (p is P3) at random inserting success rate less than the preamble number of p required configuration for assurance when access request rate during for P3 for g.
As one embodiment of the present of invention, also comprise the cycle adjusting module, if the PRACH density N that described base station obtains is identical with original PRACH density, then described cycle adjusting module is transferred described statistic period T big; If the PRACH density N that described base station obtains is different from original PRACH density, then do not adjust described statistic period T.
As one embodiment of the present of invention, also comprise alarm module, be used in the minimum value of the PRACH of current actual needs density L less than PRACH density N, during perhaps greater than the maximum of PRACH density N, report to the police to operator.
As one embodiment of the present of invention, also comprise sending module and receiver module.Described sending module, the PRACH density N that is used for obtaining reports to O﹠amp; M; Described receiver module is used for receiving O﹠amp; The feedback of M, described density adjusting module is according to described O﹠amp; The feedback of M is adjusted PRACH density.
The present invention adjusts the configuration of PRACH density automatically according to traffic intensity information by the base station, therefore can not require artificial participation, the Operation and Maintenance cost is very low, and base station of the present invention can be adjusted PRACH density in real time according to environmental change, thereby better service quality and bigger throughput are provided.And the present invention depends on community user quantity and service conditions to the adjustment of PRACH density unlike prior art, but depends on traffic intensity information, so the accuracy rate height.In addition, the present invention can in time find the deficiency that carrier network is disposed, and in time reports to the police to operator.And meeting of the present invention is adjusted according to changing automatically, therefore along with the carrying out of network operation, and environment stable gradually, what need adjusts frequency and can reduce gradually, has reduced base station and O﹠amp; Information interaction between the M.
The aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or the additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the method flow diagram of the adjustment Physical Random Access Channel PRACH channel density of the embodiment of the invention;
Fig. 2 is the architecture of base station figure of one embodiment of the invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical or similar label is represented identical or similar elements or the element with identical or similar functions all along.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.
The present invention mainly is, automatically adjust the configuration of PRACH density according to the traffic intensity information that obtains (as rate of arriving calls and incision request rate etc.) by the base station, therefore can not require artificial participation, the Operation and Maintenance cost is very low, and base station of the present invention can be adjusted PRACH density in real time according to environmental change, thereby better service quality and bigger throughput are provided.And the present invention depends on community user quantity and service conditions to the adjustment of PRACH density unlike prior art, but depends on traffic intensity information, so the accuracy rate height.
In the process of the normal operation in base station, the traffic intensity information of each residential quarter can be added up in the base station always, judges that the user initiates the frequency that inserts at random.Through traffic intensity Information Statistics after a while, can calculate the PRACH channel density of current actual needs, judge whether current PRACH density setting is suitable, and it is adjusted.Below will above-mentioned thought of the present invention be introduced in the mode of specific embodiment:
As shown in Figure 1, the method flow diagram for the adjustment PRACH channel density of the embodiment of the invention may further comprise the steps:
Step S101, the initial value of default PRACH density and the initial value of statistic period T are set to medium value as initial value that can PRACH density, as 3 etc.; The initial value of statistic period T is made as smaller value, and as 0.5 hour etc., these initial values can be set according to factors such as the environment of system, sizes, only are schematic descriptions at this.
Step S102, the base station obtains the traffic intensity information of this residential quarter in the period T.As one embodiment of the present of invention, can be by the traffic intensity information of this residential quarter in the direct detection statistics period T in base station; Perhaps, by operation management O﹠amp; M is, and the service in base station strength information is added up, and the traffic intensity information of statistics is sent to the base station.In another embodiment of the present invention, above-mentioned traffic intensity information can include but not limited to rate of arriving calls P1, incision request rate P2, uncontested preamble utilization rate P3, high speed competes preamble utilization rate P4 and low speed is competed preamble utilization rate P5 etc.Above-mentioned these parameters all can be reacted the traffic intensity of current area, for example for rate of arriving calls P1, in its expression a period of time, the number of times that in this residential quarter, makes a call, and for incision request rate P2, in its expression a period of time, neighbor cell initiates to switch the number of times of going into request to this residential quarter, just can learn at this section newly-increased request in this residential quarter in the time, the i.e. traffic intensity of this residential quarter increase according to rate of arriving calls P1 and incision request rate P2 like this.Certainly also can select other parameter, for example in the unit interval, use uncontested preamble to initiate the number of times (being uncontested preamble utilization rate) that inserts at random, the number of times (i.e. low competition preamble utilization rate) that in the unit interval, uses the number of times (namely competing the preamble utilization rate at a high speed) of competing preamble at a high speed and initiating access at random and in the unit interval, use low competition preamble initiation to insert at random, or its combination etc., in following embodiment, will describe the process according to the PRACH density of the current actual needs of these calculation of parameter in detail.Need this explanation be, those skilled in the art can select the PRACH density of other the current actual needs of calculation of parameter according to the characteristics of above-mentioned reaction traffic intensity, therefore this other parameters should be included in the traffic intensity information of the present invention.
Step S103, the base station is according to the PRACH density L of the current actual needs of traffic intensity information calculations that obtains.
In one embodiment of the invention, for the different traffic intensity information and different access strategies at random selected, the account form of the PRACH density L of current actual needs is also different, namely select different functions, certainly the function in the following example embodiment can be selected, also other functions can be selected.In order to reduce the complexity of equipment computing, can calculate the corresponding relation between different input and output in advance, and be stored in the base station, only need table look-up and get final product in actual permission back in the base station, adjusts efficient thereby improve.
As one embodiment of the present of invention, if traffic intensity information comprises rate of arriving calls P1 and incision request rate P2, and switch when not using uncontested scheme, then can be according to formula
Calculate the PRACH density L of current actual needs, wherein p is the collision probability requirement of PRACH.
As another embodiment of the present invention, if traffic intensity information comprises rate of arriving calls P1 and incision request rate P2, and switch the uncontested scheme of using, then can be according to formula
Calculate the PRACH density L of current actual needs, wherein p is the collision probability requirement of PRACH, and (p is P2) at random inserting success rate less than the preamble number of p required configuration for assurance when incision request rate during for P2 for g.
As an embodiment more of the present invention, if traffic intensity information comprises uncontested preamble utilization rate P3, competes preamble utilization rate P4 and low speed competition preamble utilization rate P5 at a high speed, then can be according to formula
Calculate the PRACH density L of current actual needs, wherein p is the collision probability requirement of PRACH, and (p is P3) at random inserting success rate less than the preamble number of p required configuration for assurance when access request rate during for P3 for g.
By above-described embodiment as can be seen for the traffic intensity information difference of selecting, can select for use different functions to calculate, above embodiment only is schematic embodiment, be not that restriction the present invention only can realize by above-described embodiment, for example also can calculate by other modes except above-mentioned formula for the traffic intensity information that comprises rate of arriving calls P1 and incision request rate P2 equally.
Step S104, the base station obtains PRACH channel density N according to the PRACH density L that obtains.As one embodiment of the present of invention, can pass through formula N-1＜L≤N and calculate, for example the PRACH density L of hypothesis calculating is 1.3, can know that then N should elect 2 as.This also only is the embodiment of a signal equally, and those skilled in the art also can calculate by other means.
Step S105, the base station is adjusted according to the PRACH channel density of PRACH channel density N that obtains.
Step S106 adjusts statistic period T according to the situation of change of the PRACH channel density N that obtains.If the PRACH density N that obtains is identical with original PRACH density, then statistic period T is transferred big; If the PRACH density N that obtains is different from original PRACH density, then can not adjust statistic period T.After the adjustment of finishing PRACH density N and statistic period T, can be back to step S102, again PRACH density N and statistic period T are adjusted.
In the above embodiment of the present invention, the adjustment of PRACH density N can independently be finished by base station side.If but the unallowed words of operator, the base station also needs the PRACH density N that above-mentioned steps is obtained to report operation management O﹠amp; M has only through O﹠amp; The approval of M, the base station is just adjusted PRACH density N.In one embodiment of the invention, the base station can report O﹠amp with the PRACH density N that obtains by northbound interface; M, and obtain O﹠amp by this northbound interface; The feedback information of M.
In another above-described embodiment of the present invention, if current PRACH density N has been minimum value, but the PRACH density L according to current actual needs judges still and need adjust downwards, if perhaps current PRACH density N has been maximum, but the PRACH density L judgement according to current actual needs still need adjust upward, then report to the police to operator in the base station, and prompting operator network design herein may need to adjust.
As shown in Figure 2, be the architecture of base station figure of one embodiment of the invention, this base station 100 comprises traffic intensity information acquisition module 110, computing module 120, channel density acquisition module 130 and density adjusting module 140.Traffic intensity information acquisition module 110 is used for obtaining the traffic intensity information of this residential quarter in the period T.Computing module 120 is used for the PRACH density L according to the current actual needs of described traffic intensity information calculations of described traffic intensity information acquisition module acquisition.Channel density acquisition module 130 is used for obtaining described PRACH channel density N according to the PRACH density L of the current actual needs of described computing module calculating.Density adjusting module 140 is used for adjusting according to the PRACH channel density of described PRACH channel density N that obtains.
As one embodiment of the present of invention, this base station 100 also comprises preserves module 150, be used for preserving the initial value of PRACH density and statistic period T, and the initial value of described PRACH density and statistic period T is respectively medium value and smaller value.
Wherein, this base station 100 also comprises cycle adjusting module 160, is used for according to the situation of change of the described PRACH channel density N that obtains statistic period T being adjusted.
As one embodiment of the present of invention, this base station 100 also comprises alarm module 170, being used at current PRACH density N has been minimum value, but in the time of still need adjusting downwards according to the PRACH density L judgement of current actual needs, be maximum at current PRACH density N perhaps, but judge according to the PRACH density L of current actual needs and to report to the police to operator still need adjust upward the time that prompting operator network design herein may need to adjust.
As one embodiment of the present of invention, this base station 100 also comprises sending module 180 and receiver module 190.The PRACH density N that sending module 180 is used for obtaining reports to O﹠amp; M.Receiver module 190 is used for receiving described O﹠amp; The feedback of M, described density adjusting module 140 is according to described O﹠amp; The feedback of M is adjusted PRACH density.
The present invention adjusts the configuration of PRACH density automatically according to traffic intensity information by the base station, therefore can not require artificial participation, the Operation and Maintenance cost is very low, and base station of the present invention can be adjusted PRACH density in real time according to environmental change, thereby better service quality and bigger throughput are provided.And the present invention depends on community user quantity and service conditions to the adjustment of PRACH density unlike prior art, but depends on traffic intensity information, so the accuracy rate height.In addition, the present invention can in time find the deficiency that carrier network is disposed, and in time reports to the police to operator.And meeting of the present invention is adjusted according to changing automatically, therefore along with the carrying out of network operation, and environment stable gradually, what need adjusts frequency and can reduce gradually, has reduced base station and O﹠amp; Information interaction between the M.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification to these embodiment that scope of the present invention is by claims and be equal to and limit.
Claims (12)
1. a method of adjusting Physical Random Access Channel PRACH channel density is characterized in that, may further comprise the steps:
The base station obtains the traffic intensity information of this residential quarter in the period T;
Described base station is according to the PRACH density L of the current actual needs of described traffic intensity information calculations that obtains;
Described base station obtains described PRACH channel density N according to the PRACH density L of described current actual needs;
Described base station is adjusted according to the PRACH channel density of PRACH channel density N of described acquisition;
Wherein, described traffic intensity information comprises rate of arriving calls P1, incision request rate P2, uncontested preamble utilization rate P3, competes among preamble utilization rate P4 and the low speed competition preamble utilization rate P5 one or more at a high speed.
2. the method for adjustment PRACH channel density as claimed in claim 1 is characterized in that, the traffic intensity information that described base station obtains interior this residential quarter of period T comprises:
Described base station detection statistics obtains the traffic intensity information of this residential quarter in the period T;
Perhaps, operation management O﹠amp; M adds up described service in base station strength information, and the described traffic intensity information that will add up sends to described base station.
3. the method for adjusting the PRACH channel density as claimed in claim 1 is characterized in that, described base station comprises according to the PRACH density L of the current actual needs of described traffic intensity information calculations that obtains:
If described traffic intensity information comprises rate of arriving calls P1 and incision request rate P2, and switch and do not use uncontested scheme, then calculate the PRACH density L of current actual needs according to following formula,
Wherein p is the collision probability requirement of PRACH;
If described traffic intensity information comprises rate of arriving calls P1 and incision request rate P2, and switches the uncontested scheme of use, then calculate the PRACH density L of current actual needs according to following formula,
If described traffic intensity information comprises uncontested preamble utilization rate P3, compete preamble utilization rate P4 and low speed competition preamble utilization rate P5 at a high speed, then calculate the PRACH density L of current actual needs according to following formula,
4. the method for adjustment PRACH channel density as claimed in claim 1 is characterized in that, the described PRACH channel density N that obtains according to the PRACH density L of current actual needs satisfies following formula:
N-1＜L≤N。
5. as the method for claim 1 or 4 described adjustment PRACH channel densities, it is characterized in that, also comprise:
Described base station reports to O﹠amp with the PRACH density N that obtains; M, and according to described O﹠amp; The feedback of M is adjusted PRACH density.
6. the method for adjustment as claimed in claim 1 PRACH channel density, it is characterized in that, also comprise: if the PRACH density L of current actual needs less than the minimum value of PRACH density N, perhaps greater than the maximum of PRACH density N, then report to the police to operator in described base station.
7. the method for adjustment PRACH channel density as claimed in claim 1 is characterized in that, also comprises: if the PRACH density N that described base station obtains is identical with original PRACH density, then described statistic period T is transferred big; If the PRACH density N that described base station obtains is different from original PRACH density, then do not adjust described statistic period T.
8. a base station is characterized in that, comprises traffic intensity information acquisition module, computing module, channel density acquisition module and density adjusting module;
Described traffic intensity information acquisition module is for the traffic intensity information that obtains this residential quarter in the period T;
Described computing module is used for the PRACH density L according to the current actual needs of described traffic intensity information calculations of described traffic intensity information acquisition module acquisition;
Described channel density acquisition module, the PRACH density L that is used for the current actual needs that calculates according to described computing module obtains described PRACH channel density N;
Described density adjusting module is used for adjusting according to the PRACH channel density of described PRACH channel density N that described channel density acquisition module obtains;
Wherein, described traffic intensity information comprises rate of arriving calls P1, incision request rate P2, uncontested preamble utilization rate P3, competes among preamble utilization rate P4 and the low speed competition preamble utilization rate P5 one or more at a high speed.
9. base station as claimed in claim 8 is characterized in that, the PRACH density L that described computing module calculates current actual needs according to the described traffic intensity information that obtains and following formula:
If described traffic intensity information comprises rate of arriving calls P1 and incision request rate P2, and switch and do not use uncontested scheme, then calculate the PRACH density L of current actual needs according to following formula,
Wherein p is the collision probability requirement of PRACH;
If described traffic intensity information comprises rate of arriving calls P1 and incision request rate P2, and switches the uncontested scheme of use, then calculate the PRACH density L of current actual needs according to following formula,
If described traffic intensity information comprises uncontested preamble utilization rate P3, compete preamble utilization rate P4 and low speed competition preamble utilization rate P5 at a high speed, then calculate the PRACH density L of current actual needs according to following formula,
10. base station as claimed in claim 8 is characterized in that, also comprises the cycle adjusting module, if the PRACH density N that described base station obtains is identical with original PRACH density, then described cycle adjusting module is transferred described statistic period T big; If the PRACH density N that described base station obtains is different from original PRACH density, then do not adjust described statistic period T.
11. base station as claimed in claim 8 is characterized in that, also comprises alarm module, is used in the minimum value of the PRACH of current actual needs density L less than PRACH density N, during perhaps greater than the maximum of PRACH density N, reports to the police to operator.
12. base station as claimed in claim 8 is characterized in that, also comprises sending module and receiver module,
Described sending module, the PRACH density N that is used for obtaining reports to O﹠amp; M;
Described receiver module is used for receiving described O﹠amp; The feedback of M, described density adjusting module is according to described O﹠amp; The feedback of M is adjusted PRACH density.
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| CN1964552A (en) * | 2005-11-11 | 2007-05-16 | 上海宇梦通信科技有限公司 | A method to dynamically regulate distribution of PRACH resource |
| CN101252386A (en) * | 2008-03-26 | 2008-08-27 | 中兴通讯股份有限公司 | Mapping method of physical accidental access channel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1964552A (en) * | 2005-11-11 | 2007-05-16 | 上海宇梦通信科技有限公司 | A method to dynamically regulate distribution of PRACH resource |
| CN101252386A (en) * | 2008-03-26 | 2008-08-27 | 中兴通讯股份有限公司 | Mapping method of physical accidental access channel |
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