CN101925148A - Method for estimating speed class of mobile terminal in multilevel cellular system - Google Patents
Method for estimating speed class of mobile terminal in multilevel cellular system Download PDFInfo
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Abstract
The invention discloses a method for estimating a speed class of a mobile terminal in a multilevel cellular system, which comprises the following steps of: allowing the multilevel cellular system to comprise multiple cell types, and when the mobile terminal enters a cell, acquiring a cell weight; when the terminal performs cell reselection, and in the set time interval, accumulating the cell weight of the original cell to Ntotal; and when the time interval is up, comparing the Ntotal, a NCR-M and a NCR-H; if the numerical value of the Ntotal is lower than that of the NCR-M, judging the speed of the mobile terminal to be a low speed; if the Ntotal is between the NCR-M and the NCR-H, judging the speed of the mobile terminal to be an intermediate speed; and if the numerical value of the Ntotal is greater than that of the NCR-H, judging the speed of the mobile terminal to be a high speed. When a new interval begins, the Ntotal is cleared. The method is also applied to cell weight accumulation only when the terminal switches and the cell weight accumulation when the terminal switches or the cell is reselected instead of the weight accumulation only when the terminal performs the cell reselection. The cell weight is only added by utilizing the existing information in the system, so that the precision of the conventional method for estimating the speed of the terminal in the system is improved.
Description
Technical field
The invention belongs to the mobile communication technology field, relate to a kind of method for estimating speed class of portable terminal, relate in particular to the method for estimating speed class of portable terminal in a kind of multilevel cellular system.
Background technology
In existing cellular communication system, particularly at the research scene of mobile robustness self-optimizing [referring to 3GPP TR 36.902v1.1.0,2009.04] in, for portable terminal switch or cell reselection process before speed class detecting, seem particularly important.The portable terminal of excessively high speed need switch or cell reselection process ahead of time accordingly, and the portable terminal of low speed has more time to rest in the former sub-district relatively.As seen, the embodiment of mobile robustness is to switch or the parameter setting of sub-district gravity treatment should adapt with the speed class of terminal.
In the definition and standard of 3GPP to LTE (Long Term Evolution) technology, 3GPP LTE TR36.331[is referring to 3GPP TS 36.331v8.5.0,2009.03] and TR 36.304[referring to 3GPP TS 36.304v8.5.0,2009.03] document introduced the method to set up that switching or cell reselection parameters and portable terminal speed class adapt.Wherein Guan Jian problem is the good estimation to the portable terminal speed class.Three kinds of speed class have been defined among the LTE: low speed, middling speed and high speed.When portable terminal is in holding state (Idle), (T at certain time intervals
CRmax) interior times N of adding up terminal generation sub-district gravity treatment incident: if the numerical value of N is lower than the threshold value N of the sub-district gravity treatment incident frequency that enters the middling speed grade
CR-M, then be judged to low speed; If be in N
CR-MThreshold value N with the sub-district gravity treatment incident frequency that enters the high speed grade
CR-HBetween, then be judged to middling speed; If be higher than N
CR-HThen be at a high speed.Correspondingly, be in state of activation (Active), (T at certain time intervals when portable terminal
HOmax) in statistics be the number of times that handover event takes place, judge that the method for speed class is similar to the above.Obviously, such speed class determine mechanism is at running of mobile terminal during at linear state, and relative accuracy can be than higher, and when terminal frequently changed direction and speed, accuracy but can not guarantee.But, for the portable terminal of high speed or middling speed, the possibility that frequently changes direction and speed is very low, so LTE adopts this simple method for estimating speed class also to should be all right.Divide after the portable terminal speed class, can be according to speed convergent-divergent criterion (Speed Dependent Scaling Rules) [referring to 3GPP TS 36.304v8.5.0,2009.03] the corresponding mobility parameter of sub-district gravity treatment and switching is adjusted accordingly, increase or reduce corresponding amount, to improve the mobility gain and to guarantee the mobile robustness gain.
In addition, accurately estimate the maximum doppler frequency of portable terminal according to signal rapid fading characteristic, thereby estimate the precise speed of terminal, it is the classical way that terminal velocity is accurately estimated, at Chinese CN02810944.9, " a kind of Doppler frequency offset estimation method of quick convergence in the mobile communication " (Hua Jingyu, sliding writing brush, Sheng Bin etc., the communication journal, 2005,26 (1): 136-141) grade has detailed introduction.But consider the complexity that realizes its algorithm and actual required precision of moving when switching to velocity estimation, these precise Estimation Method in real system not by standardization.
At complicated and new-type network environment, much different and cell type macrocell (Macro eNB) is extensively applied in the mobile radio system, for example Microcell (Pico eNB), various forms of relaying (Relay), and home cell (Home eNB) or the like.Because the difference of coverage, for the portable terminal under the uniform velocity, switch or the cycle of sub-district gravity treatment incident inconsistent, thereby make the end product of speed class of the estimation portable terminal among the LTE produce deviation.Network environment is complicated more, and it is various more to pass through cell type, and the result error of generation will be big more.
On the other hand, when differentiating the portable terminal speed class among the LTE, the process of switching and sub-district gravity treatment is relatively independent.In the time interval of setting, when the high speed mobile terminal that takes place repeatedly to switch enters holding state, because its incident that only switches before this, gravity treatment incident in sub-district does not take place, ignore handover event during statistics, can judge by accident, influenced the validity of sub-district gravity treatment; Otherwise, as the same.
Summary of the invention
Technical problem to be solved by this invention is: the method for estimating speed class of portable terminal in a kind of multilevel cellular system is provided, can significantly improves the accuracy that the terminal velocity grade is estimated.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
The method for estimating speed class of portable terminal is characterized in that in a kind of multilevel cellular system, and this method comprises the steps:
Described multilevel cellular system comprises multiple cell type, and portable terminal obtains cell weight when entering the sub-district; When gravity treatment incident in sub-district takes place terminal, and in the time interval of setting, the cell weight of the former sub-district of adding up is to N
TotalThe weight of each sub-district is directly proportional with its coverage;
Constant duration expires, relatively N
Total, terminal enters the threshold value N of middling speed grade gravity treatment frequency
CR-M, terminal enters the threshold value N of the gravity treatment frequency of high speed grade
CR-H: if N
TotalNumerical value be lower than N
CR-M, then the speed class of portable terminal is judged to low speed; If N
TotalBe in N
CR-MAnd N
CR-HBetween, then sentence it as middling speed; If N
TotalBe higher than N
CR-H, then sentence it as at a high speed.When new interval begins, N
TotalZero clearing.
As a preferred embodiment of the present invention, the cell weight of described each sub-district is corresponding one by one with cell type; Perhaps, the cell weight of described each sub-district is directly proportional with the average distance that portable terminal passes through the sub-district; Perhaps, the cell weight of described each sub-district was directly proportional with the time of mobile terminal to reside cell.
As a preferred embodiment of the present invention, described sub-district comprises one or more in large-scale, medium-sized, small-sized and the microcellular; Weight with one of them sub-district m is a set point, and the weight of other sub-districts is determined according to the ratio of itself and sub-district m coverage.
As a preferred embodiment of the present invention, described method also comprises: when terminal entered Serving cell, Serving cell was informed terminal with cell type.
The method for estimating speed class of portable terminal in a kind of multilevel cellular system, this method comprises the steps:
Described multilevel cellular system comprises multiple cell type, and portable terminal obtains cell weight when entering the sub-district; When terminal switches incident, and in the time interval of setting, the cell weight of the former sub-district of adding up is to N
Total';
Constant duration expires, relatively N
Total', terminal enters the threshold value N that the middling speed grade is switched frequency
HO-M, terminal enters the threshold value N of the switching frequency of high speed grade
HO-HIf N
Total' numerical value be lower than N
HO-M, then the speed class of portable terminal is judged to low speed; If N
Total' be in N
HO-MAnd N
HO-HBetween, then sentence it as middling speed; If N
Total' be higher than N
HO-H, then sentence it as at a high speed.When new interval begins, N
Total' zero clearing.
As a preferred embodiment of the present invention, the cell weight of described each sub-district is corresponding one by one with cell type; Perhaps, the cell weight of described each sub-district is directly proportional with the average distance that portable terminal passes through the sub-district; Perhaps, the cell weight of described each sub-district was directly proportional with the time of mobile terminal to reside cell.
As a preferred embodiment of the present invention, described sub-district comprises one or more in large-scale, medium-sized, small-sized and the microcellular; Weight with one of them sub-district m is a set point, and the weight of other sub-districts is determined according to the ratio of itself and sub-district m coverage.
The method for estimating speed class of portable terminal in a kind of multilevel cellular system, this method comprises the steps:
Described multilevel cellular system comprises multiple cell type, and portable terminal obtains cell weight when entering the sub-district; When terminal switches or during sub-district gravity treatment incident, and in the time interval of setting, the cell weight of the former sub-district of adding up is to N
Total";
Constant duration expires, relatively N
Total", terminal enters that the middling speed grade is switched and the threshold value N of gravity treatment frequency
CR﹠amp; HO-M, terminal enters the switching of high speed grade and the threshold value N of gravity treatment frequency
CR﹠amp; HO-HIf N
Total" numerical value be lower than N
CR﹠amp; HO-M, then the speed class of portable terminal is judged to low speed; If N
Total" be in N
CR﹠amp; HO-MAnd N
CR﹠amp; HO-HBetween, then sentence it as middling speed; If N
Total" be higher than N
CR﹠amp; HO-H, then sentence it as at a high speed.When new interval begins, N
Total" zero clearing.
As a preferred embodiment of the present invention, the cell weight of described each sub-district is corresponding one by one with cell type; Perhaps, the cell weight of described each sub-district is directly proportional with the average distance that portable terminal passes through the sub-district; Perhaps, the cell weight of described each sub-district was directly proportional with the time of mobile terminal to reside cell.
As a preferred embodiment of the present invention, described sub-district comprises one or more in large-scale, medium-sized, small-sized and the microcellular; Weight with one of them sub-district m is a set point, and the weight of other sub-districts is determined according to the ratio of itself and sub-district m coverage.
Beneficial effect of the present invention is: the present invention utilizes existing information in the LTE system, adds cell weight, makes that the accuracy of original terminal velocity method of estimation is improved in the system.And the present invention equally also is applicable to other similar cellular communication systems.To the configuration that the good estimation of portable terminal speed class can adapt to mobility parameter in switching in the cellular network and the cell reselection process, increase that network switches and the efficient of sub-district gravity treatment, avoid the generation of typical mobile robustness problem.
Former sub-district adds cell type in Broadcast Control Channel, inform the portable terminal that enters by broadcast mode.Increase the portable terminal expense like this, hardly.And the accuracy lifting that the portable terminal speed class is differentiated that the increase cell weight is brought is conspicuous.And, the merging statistics of handover event and sub-district gravity treatment incident, terminals consume when not only having avoided two kinds of incidents independently to add up, and prevent the erroneous judgement that the incident statistics when the unexpected transition status of mobile terminal state is omitted the speed class that causes, further improve the accuracy of speed class judgement.
Description of drawings
Fig. 1 is a flow chart of the present invention.
Fig. 2 is the structural representation of multi-level cellular communication system among the embodiment five.
Embodiment
Describe the preferred embodiments of the present invention in detail below in conjunction with accompanying drawing.
Embodiment one
The invention belongs to moving communicating field, be particularly useful in the network environment of multi-level honeycomb.So-called multi-level cellular network is meant and comprises home cell, Microcell, focus coverage cell, the cellular network environment that various cellular cells such as macrocell coexist in a certain zone.Particularly, the present invention can be widely used in various wireless communication systems, as systems such as UMTS, LTE, LTE-A, Mobile WiMAX and Mobile WiMAX II.
The invention provides a kind of method for estimating speed class that is used for the multilevel cellular system portable terminal, be included in the network environment of multi-level honeycomb, according to switching or the former cell type of sub-district gravity treatment, add cell weight when in certain intervals, adding up switching or sub-district gravity treatment event times, thereby the speed class of assessment portable terminal, be used for moving parameter self-optimizing, guarantee its mobile robustness next time switching or sub-district gravity treatment.Its cell type of portable terminal can be informed by Broadcast Control Channel (as adding in the message such as MIB, SI) in former sub-district.Owing under the equal velocity conditions of portable terminal, add up the number of times of switching or sub-district gravity treatment incident and on average pass through former sub-district apart from being inversely proportional to.The cell weight of the selected macrocell of the present invention is a fiducial value, and the cell weight of other types is to determine according to the average distance ratio that portable terminal passes through this sub-district and macrocell.Because switching and sub-district gravity treatment all characterize terminal and move, the number of times that switches with sub-district gravity treatment incident can be merged statistics, be integrated into one and overlap the unified speed class differentiation and the adjustment scheme of relevant mobility parameter.This scheme can relatively accurately be estimated the speed class of portable terminal, and the mobility parameter of Tiao Zhenging can be improved the gain of some typical mobile robustness self-optimizing scenes (" after switching late ", " switching too early ", " being not suitable for the sub-district switches " etc.) well in view of the above.
The present invention is exactly in essence in multi-level cellular network environment, on the basis of existing estimation portable terminal speed class method, characteristic in conjunction with multi-level honeycomb, when statistics switching and sub-district gravity treatment event times, the cell weight that adds the former sub-district of generation incident, it is inconsistent to the speed class estimation effect to eliminate cell type, improves the accuracy of differentiating the terminal velocity grade.And, with relatively independent but all characterize handover event and the sub-district gravity treatment incident that terminal moves, merge and consider, prevent " low speed " or " middling speed " erroneous judgement.Compare the existing method among the LTE, complicated more at cell type, in the fast more network environment of portable terminal speed, the gain that the present invention brought is just big more.
In multi-level cellular network environment, the cell type difference, the size of coverage will be inconsistent, and this inconsistent causing can draw inconsistent speed class with the portable terminal of uniform velocity in existing prescriptive procedure, so it is particularly necessary to increase the cell weight that switches with sub-district gravity treatment incident.
At first, portable terminal need be known former cell type, and this can be when terminal enters former sub-district, and terminal is informed by Broadcast Control Channel (as adding MIB, SI, in the message such as Master Information Block, SystemInformation) in the sub-district.
Secondly, the acquisition of cell weight of the present invention is relevant with the coverage of sub-district, and promptly the average distance that passes through former sub-district with terminal is weighed.As seen, the cycle of passing through that portable terminal passes through cell coverage area is inversely proportional to average distance, promptly switches and the cell weight of sub-district gravity treatment event times can be defined as and the linear function of the average traverse distance in this sub-district.For instance, sub-district first and second switch and the ratio of the cell weight of sub-district gravity treatment event times is the ratio of the average traverse distance of sub-district first and second.Do not lose fairness, the cell weight that the present invention chooses macrocell is a fiducial value.
At last, the sub-district gravity treatment is the incident of the selection better services sub-district that produces under holding state of portable terminal, and switch is the incident of the selection better services sub-district that produces under the state that portable terminal is activated, both have characterized the mobility of portable terminal to a certain extent, can provide foundation for differentiating the terminal velocity grade.The above-mentioned method that the two incident is independently added up of mentioning can be brought some unnecessary erroneous judgements, influences the efficient of sub-district gravity treatment and switching.In the present invention at certain time intervals, when terminal the sub-district gravity treatment takes place or switches, add up after adding cell weight one by one, effectively prevent erroneous judgement,, adapt with the speed of portable terminal so that system in time adjusts the mobility parameter to the portable terminal speed class.
Former sub-district adds cell type in Broadcast Control Channel, inform the portable terminal that enters by broadcast mode.Increase the portable terminal expense like this, hardly.And the accuracy lifting that the portable terminal speed class is differentiated that the increase cell weight is brought is conspicuous.And, the merging statistics of handover event and sub-district gravity treatment incident, terminals consume when not only having avoided two kinds of incidents independently to add up, and prevent in statistics time interval, the erroneous judgement that incident statistics when mobile terminal state is changed is suddenly omitted the speed class that causes further improves the accuracy of speed class judgement.Simple process flow figure of the present invention as shown in Figure 1.
Embodiment two
In the present embodiment, the method for estimating speed class of portable terminal can use in the sub-district of any type.Cell weight accumulation when present embodiment in terminal gravity treatment incident in sub-district takes place.
The method for estimating speed class of portable terminal in the multilevel cellular system of present embodiment, this method comprises the steps:
Described multilevel cellular system comprises multiple cell type, and portable terminal obtains cell weight when entering the sub-district; When gravity treatment incident in sub-district takes place terminal, and in the time interval of setting, the cell weight of the former sub-district of adding up is to N
TotalThe weight of each sub-district is directly proportional with its coverage.When new interval begins, N
TotalBe zero.After this, every through a gravity treatment, N
TotalAdd the weight of this sub-district.
Constant duration expires, relatively N
Total, terminal enters the threshold value N of middling speed grade gravity treatment frequency
CR-M, terminal enters the threshold value N of the gravity treatment frequency of high speed grade
CR-H: if N
TotalNumerical value be lower than N
CR-M, then the speed class of portable terminal is judged to low speed; If N
TotalBe in N
CR-MAnd N
CR-HBetween, then sentence it as middling speed; If N
TotalBe higher than N
CR-H, then sentence it as at a high speed.When new interval begins, N
TotalZero clearing.
Embodiment three
In the present embodiment, the method for estimating speed class of portable terminal can use in the sub-district of any type.Cell weight accumulation when present embodiment switches incident in terminal.
The method for estimating speed class of portable terminal in the multilevel cellular system of present embodiment, this method comprises the steps:
Described multilevel cellular system comprises multiple cell type, and portable terminal obtains cell weight when entering the sub-district; When terminal switches incident, and in the time interval of setting, the cell weight of the former sub-district of adding up is to N
Total'.When new interval begins, N
Total' be zero.After this, every through once switching N
Total' add the weight of this sub-district.
Constant duration expires, relatively N
Total', terminal enters the threshold value N that the middling speed grade is switched frequency
HO-M, terminal enters the threshold value N of the switching frequency of high speed grade
HO-HIf N
Total' numerical value be lower than N
HO-M, then the speed class of portable terminal is judged to low speed; If N
Total' be in N
HO-MAnd N
HO-HBetween, then sentence it as middling speed; If N
Total' be higher than N
HO-H, then sentence it as at a high speed.When new interval begins, N
Total' zero clearing.
Embodiment four
In the present embodiment, the method for estimating speed class of portable terminal can use in the sub-district of any type.The present embodiment terminal switches or cell weight accumulation all during the gravity treatment of sub-district.
The method for estimating speed class of portable terminal comprises the steps: in the multilevel cellular system of present embodiment
Described multilevel cellular system comprises multiple cell type, and portable terminal obtains cell weight when entering the sub-district; When terminal switches or during sub-district gravity treatment incident, and in the time interval of setting, the cell weight of the former sub-district of adding up is to N
Total".When new interval begins, N
Total" be zero.After this, every through once switching or gravity treatment N
Total" add the weight of this sub-district.
Constant duration expires, relatively N
Total", terminal enters that the middling speed grade is switched and the threshold value N of gravity treatment frequency
CR﹠amp; HO-M, terminal enters the switching of high speed grade and the threshold value N of gravity treatment frequency
CR﹠amp; HO-HIf N
Total" numerical value be lower than N
CR﹠amp; HO-M, then the speed class of portable terminal is judged to low speed; If N
Total" be in N
CR﹠amp; HO-MAnd N
CR﹠amp; HO-HBetween, then sentence it as middling speed; If N
Total" be higher than N
CR﹠amp; HO-H, then sentence it as at a high speed.When new interval begins, N
Total" zero clearing.
Embodiment five
The present invention includes the interpolation switching and the cell weight of sub-district gravity treatment event times, the definition and the storage of weight parameter, and the adjustment that comprises weight parameter relevant parameter when interior differentiation portable terminal speed class.Describe present embodiment in detail below in conjunction with Fig. 2.
Fig. 2 is the schematic construction block diagram that is used to realize the multi-level cellular communication system of the embodiment of the invention.This wireless communication system comprises macrocell, Microcell, home cell, mobile management entity/gateway.The embodiment of the invention is not limited to legend network and structure.
In the multi-level cellular network as shown in Figure 2, triformed sub-district is respectively macrocell, Microcell and home cell.The sub-district needs to consider the speed class of portable terminal when mobility parameter such as gravity treatment of portable terminal sub-district and switching is set.In 3GPP LTE TR36.331 document, the speed class of portable terminal is defined as three kinds: low speed, middling speed and high speed.Have the adjustment mode of a kind of corresponding sub-district gravity treatment and handoff parameter at every kind of speed class, thereby reach mobility gain maximization, guarantee the terminal mobile robustness.
For the relatively accurate terminal velocity grade of describing, eliminate former cell type to differentiating result's error, when interior at certain time intervals statistics switching and sub-district gravity treatment incident, need add cell weight according to the type difference of former sub-district.The acquisition of end side cell type is that the sub-district is passed through Broadcast Control Channel (as adding in the message such as MIB, SI) and informed.For example, when in former sub-district being macrocell, Microcell and home cell, cell weight can be defined as P
Macro, P
PicoAnd P
Home
The acquisition of cell weight of the present invention is relevant with the coverage of sub-district, and promptly the distance of on average passing through former sub-district with terminal is weighed.As seen, the cycle of passing through that portable terminal passes through cell coverage area is inversely proportional to average distance, promptly switches and the cell weight of sub-district gravity treatment event times can be defined as and the linear function of the average traverse distance in this sub-district.For instance, sub-district first and second switch and the ratio of the cell weight of sub-district gravity treatment event times is the ratio of the average traverse distance of sub-district first and second.Do not lose fairness, the cell weight that the present invention chooses macrocell is a fiducial value.
In conjunction with the network entity among Fig. 2, the average traverse distance of macrocell, Microcell and home cell is respectively d
Macro, d
Pico, d
Home, be without loss of generality, might as well establish P
Macro=1, then
P
pico＝P
macro*d
pico/d
macro＝d
pico/d
macro (1)
P
home＝P
macro*d
home/d
macro＝d
home/d
macro (2)
Because terminal is switched and the sub-district gravity treatment all characterizes mobility,, both are merged statistics so when differentiating the terminal velocity grade, do not distinguish and switch statistics period and sub-district gravity treatment statistical interval.Corresponding critical parameter such as T
CRmax, N
CR-M, N
CR-H, T
HOmax, N
HO-M, N
HO-HBe modified to T
CR﹠amp; HOmax, N
CR﹠amp; HO-M, N
CR﹠amp; HO-HPresent embodiment, the number of times sum of statistics switching and sub-district gravity treatment.
Wherein:
T
CRmax: the time interval of statistics sub-district gravity treatment incident during the estimating velocity grade;
N
CR-M: terminal enters the threshold value of the sub-district gravity treatment incident frequency of middling speed grade;
N
CR-H: terminal enters the threshold value of the sub-district gravity treatment incident frequency of high speed grade;
T
HOmax: the time interval of statistics handover event during the estimating velocity grade;
N
HO-M: terminal enters the threshold value of the handover event frequency of middling speed grade;
N
HO-H: terminal enters the threshold value of the handover event frequency of high speed grade;
T
CR﹠amp; HOmax: the time interval of revising back statistics switching and sub-district gravity treatment incident;
N
CR﹠amp; HO-M: revise the back terminal and enter the switching of middling speed grade and the threshold value of sub-district gravity treatment frequency;
N
CR﹠amp; HO-H: revise the back terminal and enter the switching of high speed grade and the threshold value of sub-district gravity treatment frequency;
At T
CR﹠amp; HOmaxIn time, if switching and sub-district gravity treatment number of times sum that statistics obtains taking place when former sub-district is macrocell, Microcell and home cell are respectively N
Macro, N
Pico, N
Micro, then
N
total＝P
macro*N
macro+P
pico*N
pico+P
home*N
home (3)
Relatively weighted accumulation switches and sub-district gravity treatment event times sum N then
TotalWith N
CR﹠amp; HO-M, N
CR﹠amp; HO-HSize.Similar among method of discrimination and the 3GPP LTE TR36.304, N even
TotalNumerical value be lower than N
CR﹠amp; HO-M, then be judged to low speed; If be in N
CR﹠amp; HO-MAnd N
CR﹠amp; HO-HBetween, then be judged to middling speed; If be higher than N
CR﹠amp; HO-H, then be at a high speed.According to the accurate relatively velocity estimation of portable terminal, can improve the mobility gain, guarantee the mobile robustness of portable terminal to greatest extent.Various cell weight parameters are safeguarded in sub-district and core-network side.
Embodiment six
In the present embodiment, the method for estimating speed class method of portable terminal comprises the steps: in the multilevel cellular system
1, when terminal entered, Serving cell was informed terminal (as adding in the message such as MIB, SI, informing by Broadcast Control Channel) with cell type.
2, at certain time intervals in statistics switch and during sub-district gravity treatment number of times, need to consider to switch and the type of the former sub-district of sub-district gravity treatment, increase cell weight, it is inconsistent to differentiating the influence of portable terminal speed class, the raising accuracy to eliminate cell type.
3, when weighing cell weight, select portable terminal to pass through the average distance of former sub-district as foundation.
4, the cell weight value is directly proportional with the average traverse distance in sub-district, and the cell weight of selecting certain sub-district is a fiducial value, and the cell weight value of other cell types is this sub-district and the ratio of the average traverse distance of benchmark sub-district.
5, at certain time intervals during statistical phenomeon, will switch and gravity treatment incident in sub-district merges statistics, the original relatively independent utilization switching and the differentiation process conformity of sub-district gravity treatment number of times will be become a unified process, revise the correlation discriminating parameter, avoid the erroneous judgement of some speed class.
Here description of the invention and application is illustrative, is not to want with scope restriction of the present invention in the above-described embodiments.Here the distortion of disclosed embodiment and change are possible, and the various parts of the replacement of embodiment and equivalence are known for those those of ordinary skill in the art.Those skilled in the art are noted that under the situation that does not break away from spirit of the present invention or substantive characteristics, and the present invention can be with other form, structure, layout, ratio, and realize with other assembly, material and parts.Under the situation that does not break away from the scope of the invention and spirit, can carry out other distortion and change here to disclosed embodiment.
Claims (10)
1. the method for estimating speed class of portable terminal in the multilevel cellular system is characterized in that this method comprises the steps:
Described multilevel cellular system comprises multiple cell type, and portable terminal obtains cell weight when entering the sub-district; When gravity treatment incident in sub-district takes place terminal, and in the time interval of setting, the cell weight of the former sub-district of adding up is to N
TotalThe weight of each sub-district is directly proportional with its coverage;
Constant duration expires, relatively N
Total, terminal enters the threshold value N of middling speed grade gravity treatment frequency
CR-M, terminal enters the threshold value N of the gravity treatment frequency of high speed grade
CR-H: if N
TotalNumerical value be lower than N
CR-M, then the speed class of portable terminal is judged to low speed; If N
TotalBe in N
CR-MAnd N
CR-HBetween, then sentence it as middling speed; If N
TotalBe higher than N
CR-H, then sentence it as at a high speed; When new interval begins, N
TotalZero clearing.
2. the method for estimating speed class of portable terminal in the multilevel cellular system according to claim 1 is characterized in that:
The cell weight of described each sub-district is corresponding one by one with cell type; Perhaps
The cell weight of described each sub-district is directly proportional with the average distance that portable terminal passes through the sub-district; Perhaps
The cell weight of described each sub-district was directly proportional with the time of mobile terminal to reside cell.
3. the method for estimating speed class of portable terminal in the multilevel cellular system according to claim 1 is characterized in that:
Described sub-district comprises one or more in large-scale, medium-sized, small-sized and the microcellular;
Weight with one of them sub-district m is a set point, and the weight of other sub-districts is determined according to the ratio of itself and sub-district m coverage.
4. the method for estimating speed class of portable terminal in the multilevel cellular system according to claim 1 is characterized in that:
Described method also comprises: when terminal entered Serving cell, Serving cell was informed terminal with cell type.
5. the method for estimating speed class of portable terminal in the multilevel cellular system is characterized in that this method comprises the steps:
Described multilevel cellular system comprises multiple cell type, and portable terminal obtains cell weight when entering the sub-district; When terminal switches incident, and in the time interval of setting, the cell weight of the former sub-district of adding up is to N
Total';
Constant duration expires, relatively N
Total', terminal enters the threshold value N that the middling speed grade is switched frequency
HO-M, terminal enters the threshold value N of the switching frequency of high speed grade
HO-HIf N
Total' numerical value be lower than N
HO-M, then the speed class of portable terminal is judged to low speed; If N
Total' be in N
HO-MAnd N
HO-HBetween, then sentence it as middling speed; If N
Total' be higher than N
HO-H, then sentence it as at a high speed; When new interval begins, N
Total' zero clearing.
6. the method for estimating speed class of portable terminal in the multilevel cellular system according to claim 5 is characterized in that:
The cell weight of described each sub-district is corresponding one by one with cell type; Perhaps
The cell weight of described each sub-district is directly proportional with the average distance that portable terminal passes through the sub-district; Perhaps
The cell weight of described each sub-district was directly proportional with the time of mobile terminal to reside cell.
7. the method for estimating speed class of portable terminal in the multilevel cellular system according to claim 5 is characterized in that:
Described sub-district comprises one or more in large-scale, medium-sized, small-sized and the microcellular;
Weight with one of them sub-district m is a set point, and the weight of other sub-districts is determined according to the ratio of itself and sub-district m coverage.
8. the method for estimating speed class of portable terminal in the multilevel cellular system is characterized in that this method comprises the steps:
Described multilevel cellular system comprises multiple cell type, and portable terminal obtains cell weight when entering the sub-district; When terminal switches or during sub-district gravity treatment incident, and in the time interval of setting, the cell weight of the former sub-district of adding up is to N
Total";
Constant duration expires, relatively N
Total", terminal enters that the middling speed grade is switched and the threshold value N of gravity treatment frequency
CR﹠amp; HO-M, terminal enters the switching of high speed grade and the threshold value N of gravity treatment frequency
CR﹠amp; HO-HIf N
Total" numerical value be lower than N
CR﹠amp; HO-M, then the speed class of portable terminal is judged to low speed; If N
Total" be in N
CR﹠amp; HO-MAnd N
CR﹠amp; HO-HBetween, then sentence it as middling speed; If N
Total" be higher than N
CR﹠amp; HO-H, then sentence it as at a high speed; When new interval begins, N
Total" zero clearing.
9. the method for estimating speed class of portable terminal in the multilevel cellular system according to claim 8 is characterized in that:
The cell weight of described each sub-district is corresponding one by one with cell type; Perhaps
The cell weight of described each sub-district is directly proportional with the average distance that portable terminal passes through the sub-district; Perhaps
The cell weight of described each sub-district was directly proportional with the time of mobile terminal to reside cell.
10. the method for estimating speed class of portable terminal in the multilevel cellular system according to claim 8 is characterized in that:
Described sub-district comprises one or more in large-scale, medium-sized, small-sized and the microcellular;
Weight with one of them sub-district m is a set point, and the weight of other sub-districts is determined according to the ratio of itself and sub-district m coverage.
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