CN101316400A - Method, system and device for community re-selection and switch - Google Patents

Method, system and device for community re-selection and switch Download PDF

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Publication number
CN101316400A
CN101316400A CNA2007100997176A CN200710099717A CN101316400A CN 101316400 A CN101316400 A CN 101316400A CN A2007100997176 A CNA2007100997176 A CN A2007100997176A CN 200710099717 A CN200710099717 A CN 200710099717A CN 101316400 A CN101316400 A CN 101316400A
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district
sub
subscriber equipment
module
motion
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Chinese (zh)
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袁晓
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Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
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Priority to CNA2007100997176A priority Critical patent/CN101316400A/en
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Abstract

The invention discloses a cell reselection method which includes that power magnitudes of a serving cell and a neighbor cell are measured so as to determine whether the cell meets the requirement for residing; the motion direction of user equipment is determined; according to the measured power magnitudes and the motion direction of the user equipment, the cell is selected as a target cell when the cell meets the requirement for residing and a base station in which the cell is positioned is closest to the motion direction of the user equipment, and the cell reselection is carried out. By adopting the method of the invention, the problem of more times for the cell reselection and switching existing in the prior art is solved. Simultaneously, the invention also discloses user equipment as well as a method, a system and a device for cell switching.

Description

A kind of method, system and device that carry out sub-district gravity treatment and switching
Technical field
The present invention relates to communication technical field, particularly a kind of method, system and device that carry out sub-district gravity treatment and switching.
Background technology
In 3G (Third Generation) Moblie standardization body (3rd Generation Partnership Project:3GPP) standard, subscriber equipment (UE) needs to communicate by letter constantly with sub-district on every side, selects the strongest sub-district of signal resident.
In reuse adoption process, UE determines the gravity treatment Target cell by measuring the power of Serving cell and adjacent sub-district, that is to say when carrying out the sub-district gravity treatment, and be to determine Target cell according to the measurement performance number of sub-district by UE.
In handoff procedure, the Serving cell that network side reports by UE and the measurement performance number of adjacent sub-district are determined switching target small area, and then notice UE switches to Target cell and gets on.
At present when sub-district gravity treatment or switching take place in UE, amplitude of variation is bigger at short notice to tend to the complexity owing to environmental change, the inaccuracy that UE measures and the received power that influences that is subjected to noise jamming, thereby deviation appears in the power results that causes UE to measure Serving cell and adjacent sub-district, thereby make the UE gravity treatment or switch to one can not be resident with respect to the peripheral cell maximum duration the sub-district, that is to say gravity treatment or switching to one is not optimal sub-district.Simultaneously, when UE is in the high-speed motion, when selecting the Target cell of gravity treatment or switching,, then be easy to occur frequent gravity treatment or switching, cause the increase of network burden if still just carry out according to the current measured value of UE.
As shown in Figure 1, carry out in the schematic diagram of sub-district gravity treatment or switching in the prior art UE moving process, because the residing environment more complicated of UE, and the resident sub-district of UE this moment is sub-district 1, if UE will carry out the sub-district gravity treatment, and the power of sub-district 2 and sub-district 3 all can satisfy assurance UE speech quality, but the power of sub-district 2 is strong slightly, then UE can select sub-district 2 to carry out the sub-district gravity treatment as Target cell, as we know from the figure, according to the movement tendency of present UE, a sub-district gravity treatment just will take place again in very fast UE, and can select sub-district 3 as new Target cell; If will carrying out the sub-district, UE switches, then the UE measurement report that will comprise cell power reports network side, network side judges that according to measurement report the power of sub-district 2 and sub-district 3 all can satisfy assurance UE speech quality, but the power of sub-district 2 is strong slightly, then notify UE that the sub-district is carried out as Target cell in sub-district 2 and switch, as we know from the figure, according to the movement tendency of present UE, a sub-district switching just will take place again in very fast UE, with sub-district 3 as new Target cell.
As shown in Figure 2, prior art UE takes place in the schematic diagram of table tennis sub-district gravity treatment or switching, and UE resides on the sub-district 3 now, but also closer apart from sub-district 1 and sub-district 2.At this time if be subjected to measured deviation or noise jamming, carry out sub-district gravity treatment or switching possibly, and according to power selection sub-district 1 or the sub-district 2 measured, but after disturbing disappearance by the time, because the signal power outline of sub-district 3 more by force, very fast UE can carry out sub-district gravity treatment or switching again again, and can be with sub-district 3 as Target cell.
In sum, UE carries out sub-district gravity treatment or switching according to the power of measuring the sub-district at present, but this method is subjected to environmental interference easily, thereby has increased the number of times of gravity treatment or switching, and is easy to generate ping-pong reselection or switching, has increased the burden of network.
Summary of the invention
The invention provides a kind of method, system and device that carry out sub-district gravity treatment and switching, in order to solve the sub-district gravity treatment that exists in the prior art and the many problems of number of times of switching.
A kind of method of cell reselection of carrying out comprises:
The performance number of measuring Serving cell and adjacent sub-district is in order to determine whether the sub-district satisfies resident condition;
Determine the direction of motion of subscriber equipment;
According to the performance number of measuring and the direction of motion of subscriber equipment, the sub-district gravity treatment is carried out as Target cell in the base station of selecting to satisfy resident condition and its place sub-district of the direction of motion of close subscriber equipment.
A kind of subscriber equipment comprises:
First measurement module is used to measure the performance number of Serving cell and adjacent sub-district in order to determine whether the sub-district satisfies resident condition;
Select module, be used for determining the direction of motion of self;
The gravity treatment module, self the direction of motion that is used for that the performance number measured according to described first measurement module and described selection module determine, selection is satisfied the most close self the sub-district of the direction of motion, the base station at resident condition and its place as Target cell, carries out the sub-district gravity treatment.
A kind of method of carrying out switching the sub-district comprises:
Subscriber equipment is measured the performance number of Serving cell and adjacent sub-district, and determines the parameter of the direction of motion of self, and the measurement report that will comprise the parameter of described performance number and described displacement direction sends to network side;
Described network side is according to the direction of motion parameter of the described subscriber equipment in the described measurement report, determine the direction of motion of described subscriber equipment, and according to the described performance number in the described measurement report and the direction of motion of described subscriber equipment, described subscriber equipment is notified as Target cell in the base station that resident condition and its place are satisfied in the selection sub-district of the direction of motion of close described subscriber equipment;
After described subscriber equipment is received described notice, carry out the sub-district and switch.
A kind of system that carries out switching the sub-district comprises:
Subscriber equipment, be used to measure the performance number of Serving cell and adjacent sub-district, and determine the parameter of the direction of motion of self, the measurement report that will comprise the parameter of described performance number and described displacement direction sends to network side, switches according to carry out the sub-district from the notice of the described network equipment;
The network equipment, be used for direction of motion parameter according to the described subscriber equipment of described measurement report, determine the direction of motion of described subscriber equipment, and according to the described performance number in the described measurement report and the direction of motion of described subscriber equipment, described subscriber equipment is notified as Target cell in the base station that resident condition and its place are satisfied in the selection sub-district of the direction of motion of close described subscriber equipment.
A kind of subscriber equipment comprises:
First measurement module is used to measure the performance number of Serving cell and adjacent sub-district;
First sending module is used for determining the parameter of displacement direction, and the parameter of described performance number in described first measurement module and described displacement direction is placed measurement report, sends to the network equipment;
Handover module is used for switching according to carry out the sub-district from the notice of the described network equipment.
A kind of network equipment comprises:
Select module, be used for the direction of motion parameter of basis, determine the direction of motion of described subscriber equipment from the described subscriber equipment of the measurement report of subscriber equipment;
Processing module, the direction of motion that is used for the described subscriber equipment determined according to the described performance number of described measurement report and described selection module, the base station of selecting to satisfy resident condition and its place the sub-district of the direction of motion of close described subscriber equipment as Target cell;
Notification module is used for the described subscriber equipment of described cell notification that described processing module is determined.
The embodiment of the invention is when carrying out the sub-district gravity treatment or switching, need to measure the performance number of Serving cell and adjacent sub-district in order to determine whether the sub-district satisfies resident condition, and the direction of motion of definite subscriber equipment, according to the performance number of measuring and the direction of motion of subscriber equipment, the base station that resident condition and its place are satisfied in selection the sub-district of the direction of motion of close subscriber equipment as Target cell, carry out sub-district gravity treatment or switching, thereby reduced the number of times of gravity treatment or switching, eliminate the situation of ping-pong reselection or switching, reduced the burden of network.
Description of drawings
The schematic diagram of Fig. 1 for carrying out sub-district gravity treatment or switching in the prior art UE moving process;
The schematic diagram of table tennis sub-district gravity treatment or switching takes place in Fig. 2 for prior art UE;
Fig. 3 A is the UE composition schematic diagram that the embodiment of the invention is carried out the sub-district gravity treatment;
Fig. 3 B is that the embodiment of the invention is carried out the method for cell reselection schematic flow sheet;
Fig. 4 A is that the embodiment of the invention is carried out the system schematic that switch the sub-district;
Fig. 4 B is that the UE that the embodiment of the invention carries out switching the sub-district forms schematic diagram;
Fig. 4 C is that the network equipment that the embodiment of the invention carries out switching the sub-district is formed schematic diagram;
Fig. 4 D is that the embodiment of the invention is carried out the method flow schematic diagram that switch the sub-district;
The schematic diagram that Fig. 5 A calculates for embodiment of the invention Doppler frequency shift;
Fig. 5 B is the schematic diagram that the embodiment of the invention adopts the Doppler frequency shift value to carry out sub-district gravity treatment or switching;
Fig. 5 C is the schematic diagram that the embodiment of the invention adopts positional information to carry out sub-district gravity treatment or switching.
Embodiment
The many problems of number of times at sub-district gravity treatment that exists in the prior art and switching, the embodiment of the invention is when carrying out the sub-district gravity treatment or switching, need to measure the performance number of Serving cell and adjacent sub-district in order to determine whether the sub-district satisfies resident condition, and the direction of motion of definite subscriber equipment, according to the performance number of measuring and the direction of motion of subscriber equipment, the base station that resident condition and its place are satisfied in selection the sub-district of the direction of motion of close subscriber equipment as Target cell, carry out sub-district gravity treatment or switching, thereby solved the problems referred to above.
As shown in Figure 3A, the embodiment of the invention UE that carries out the sub-district gravity treatment comprises: first measurement module 100, select module 101 and gravity treatment module 102.
First measurement module 100 is connected with gravity treatment module 102, is used to measure the performance number of Serving cell and adjacent sub-district in order to determine whether the sub-district satisfies resident condition.
Select module 101, be connected, be used for determining the direction of motion of self with gravity treatment module 102.
Gravity treatment module 102, be connected with selection module 101 with first measurement module 100, self the direction of motion that is used for the performance number of measuring according to first measurement module 100 and selects that module 101 determines, selection is satisfied the most close self the sub-district of the direction of motion, the base station at resident condition and its place as Target cell, carries out the sub-district gravity treatment.
Wherein, if determine self the direction of motion, then select module 101 to comprise: second measurement module 1010, setting module 1011 and comparison module 1012 according to the Doppler frequency shift value.
Second measurement module 1010 is connected with setting module 1011, is used to measure the frequency values of Serving cell and adjacent sub-district.
Setting module 1011 is connected with second measurement module 1010, is used for determining according to the frequency values of second measurement module twice measurement in 1010 front and back the Doppler frequency shift value of sub-district.
Comparison module 1012 is connected the size that is used for each sub-district Doppler frequency shift value that more described setting module determines with setting module 1011, determine the sub-district of Doppler frequency shift maximum, and the base station at its place i.e. the direction of motion of the most close UE.
Setting module 1011 can also comprise: computing module 10110 and determination module 10111.
Computing module 10110 is connected with determination module 10111, and it is poor to be used for the frequency values of second measurement module twice measurement in 1010 front and back.
Determination module 10111 is connected with computing module 10110, is used for difference that computing module 10110 the is determined Doppler frequency shift value as the sub-district.
Wherein, if determine self the direction of motion, then select module 101 to comprise: information module 1012, the first slope determination module 1013 and the second slope determination module 1014 according to positional information.
Information module 1012 is connected with the first slope determination module 1013, is used for determining certainly in the positional information of two time points and the positional information of Serving cell and adjacent sub-district.
The first slope determination module 1013, be connected with the second slope determination module 1014 with information module 1012, be used for according to from the positional information of two time points and the positional information of described Serving cell and base station, place, adjacent sub-district, determine self direction of motion slope and the position of each base station, place, sub-district with respect to from relative bearing slope in initial time point position.
The second slope determination module 1014, be connected with the first slope determination module 1013, be used to calculate displacement direction slope and with the absolute value of the difference of the relative bearing slope of each sub-district, determine the absolute slope of each base station, the sub-district at the place, base station of absolute slope value minimum is the most close self the sub-district of the direction of motion.
Shown in Fig. 3 B, the embodiment of the invention is carried out method of cell reselection and is comprised the following steps:
Step 300, UE measure the performance number of Serving cell and adjacent sub-district in order to determine whether the sub-district satisfies resident condition.
Step 301, UE determine the direction of motion of self.
Step 302, UE be according to the performance number of measuring and the direction of motion of self, selects to satisfy the most close self the sub-district of the direction of motion, the base station at resident condition and its place as Target cell.
Step 303, UE carry out the sub-district gravity treatment according to the Target cell of determining.
Wherein, if determine the direction of motion of UE according to the Doppler frequency shift value, then in the step 301,
UE measures the frequency values of Serving cell and adjacent sub-district, determine the Doppler frequency shift value of sub-district according to the frequency values of twice measurement in front and back, the size of each sub-district Doppler frequency shift value is relatively determined the sub-district of Doppler frequency shift maximum, and the base station at its place i.e. the direction of motion of the most close UE.
In the step 301, UE can be poor with the frequency values of twice measurement in front and back, with the difference that the obtains Doppler frequency shift value as the sub-district.
Wherein, if determine the direction of motion of UE according to positional information, then in the step 301,
UE determines certainly in the positional information of two time points and the positional information of Serving cell and adjacent sub-district; According to from the positional information of two time points and the positional information of Serving cell and base station, place, adjacent sub-district, determine self direction of motion slope and the position of each base station, place, sub-district with respect to from relative bearing slope in initial time point position;
UE calculate displacement direction slope and with the absolute value of the difference of the relative bearing slope of each sub-district, determine that the absolute slope of each base station, the sub-district at the place, base station of absolute slope value minimum are the most close self the sub-district of the direction of motion.
Shown in Fig. 4 A, the system that the embodiment of the invention carries out switching the sub-district comprises: the UE 30 and the network equipment 40.
UE 30, with the network equipment 40 wireless connections, be used to measure the performance number of Serving cell and adjacent sub-district, and determine the parameter of the direction of motion of self, the measurement report that will comprise the parameter of performance number and displacement direction sends to the network equipment 40, switches according to carry out the sub-district from the notice of the network equipment 40.
The network equipment 40, with UE 30 wireless connections, be used for the direction of motion parameter of basis from the UE 30 of the measurement report of UE 30, determine the direction of motion of UE 30, and according to the direction of motion of the performance number in the measurement report with the UE 30 that determines, selection is satisfied the sub-district of the direction of motion of the most close UE 30 in base station at resident condition and its place as Target cell, notice UE 30.
Shown in Fig. 4 B, the UE that the embodiment of the invention carries out switching the sub-district comprises: first measurement module 300, first sending module 301 and handover module 302.
First measurement module 300 is connected with first sending module 301, is used to measure the performance number of Serving cell and adjacent sub-district.
First sending module 301 is connected with first measurement module 300, is used for determining the parameter of displacement direction, and the parameter of performance number in first measurement module 300 and displacement direction is placed measurement report, sends to the network equipment 40.
Handover module 302 is used for switching according to carry out the sub-district from the notice of the network equipment 40.
Wherein, if the parameter of the direction of motion is a frequency values, then first sending module 301 can also comprise: second measurement module 3010 and second sending module 3011.
Second measurement module 3010 is connected with second sending module 3011, is used to measure the frequency values of Serving cell and adjacent sub-district, with the frequency values that the obtains parameter as the displacement direction.
Second sending module 3011 is connected with second measurement module 3010, is used for the frequency values that the performance number and second measurement module 3010 of 300 measurements of first measurement module are measured is placed measurement report, sends to the network equipment 40.
Wherein, if the parameter of the direction of motion is a positional information, then first sending module 301 can also comprise: information module 3012 and the 3rd sending module 3013.
Information module 3012 is connected with the 3rd sending module 3013, is used for determining from the positional information of two time points and the positional information of Serving cell and adjacent sub-district, with the positional information that the obtains parameter as the displacement direction.
The 3rd sending module 3013 is connected with information module 3012, and the performance number and the information module 3012 definite positional informations that are used for first measurement module 300 is measured place measurement report, send to the network equipment 40.
Shown in Fig. 4 C, the network equipment that the embodiment of the invention carries out switching the sub-district comprises: select module 400, processing module 401 and notification module 402.
Select module 400, be connected, be used for the direction of motion parameter of basis, determine the direction of motion of UE 30 from the UE 30 of the measurement report of UE 30 with processing module 401.
Processing module 401, be connected with notification module 402 with selecting module 400, be used for according to the performance number of measurement report and select the direction of motion of the UE 30 that module 400 determines, the sub-district of the direction of motion of the most close UE 30 in base station of selecting to satisfy resident condition and its place is as Target cell.
Notification module 402 is connected with processing module 401, is used for the cell notification UE 30 that processing module 401 is determined.
Wherein, if determine the direction of motion of UE 30, then select module 400 to comprise: setting module 4000 and comparison module 4001 according to the Doppler frequency shift value.
Setting module 4000 is connected with comparison module 4001, is used for determining according to the frequency values of twice measurement in front and back of measurement report the Doppler frequency shift value of sub-district.
Comparison module 4001 is connected with setting module 4000, is used for the size of each sub-district Doppler frequency shift value that comparison setting module 4000 determines, determines the sub-district of Doppler frequency shift maximum, and the base station at its place i.e. the direction of motion of the most close UE 30.
Setting module 4000 can also comprise: computing module 40000 and determination module 40001.
Computing module 40000 is connected with determination module 40001, and it is poor to be used for the frequency values of twice measurement in front and back of measurement report.
Determination module 40001 is connected with computing module 40000, is used for difference that computing module 40000 the is determined Doppler frequency shift value as the sub-district.
Wherein, if determine the direction of motion of UE 30, then select module 400 to comprise: the first slope determination module 4002 and the second slope determination module 4003 according to positional information
The first slope determination module 4002, be connected with the second slope determination module 4003, be used for UE 30 according to measurement report in the positional information of two time points and the positional information of described Serving cell and adjacent sub-district, the position of determining the direction of motion slope of UE 30 and each base station, place, sub-district is with respect to the relative bearing slope of UE 30 in initial time point position.
The second slope determination module 4003, be connected with the first slope determination module 4002, be used to calculate UE 30 direction of motion slopes and with the absolute value of the difference of the relative bearing slope of each sub-district, determine the absolute slope of each base station, the sub-district at the place, base station of absolute slope value minimum is the sub-district of the direction of motion of the most close UE 30.
Shown in Fig. 4 D, the method that the embodiment of the invention carries out switching the sub-district comprises the following steps:
Step 400, UE measure the performance number of Serving cell and adjacent sub-district, and the parameter of definite displacement direction.
The measurement report that step 401, UE will comprise the parameter of performance number and displacement direction sends to network side.
Step 402, network side are determined the direction of motion of UE according to the direction of motion parameter from the UE in the measurement report of UE.
Step 403, network side be according to the direction of motion of performance number in the measurement report and definite UE, the base station of selecting to satisfy resident condition and its place the sub-district of the direction of motion of close UE as Target cell.
Step 404, network side notice UE switch on definite Target cell.
After step 405, UE are notified, carry out the sub-district and switch.
Wherein,, then in the step 400, measure the frequency values of Serving cell and adjacent sub-district, with the frequency values that obtains parameter as the displacement direction if frequency values is the parameter of the direction of motion of UE.
In the step 402, network side is determined the Doppler frequency shift value of sub-district according to the frequency values of twice measurement in front and back in the measurement report, the size of each sub-district Doppler frequency shift value is relatively determined the sub-district of Doppler frequency shift maximum, and the base station at its place i.e. the direction of motion of the most close UE.
In the step 402, network side can also according in the measurement report frequency values and reference frequency value poor, with the difference that obtains Doppler frequency shift value as the sub-district.
Wherein, if positional information is the parameter of the direction of motion of UE, then in the step 400, UE determines certainly in the positional information of two time points and the positional information of Serving cell and adjacent sub-district, with the parameter of definite positional information as the displacement direction.
In the step 402, in the positional information of two time points and the positional information of Serving cell and base station, place, adjacent sub-district, the position of determining the direction of motion slope of UE and each base station, place, sub-district is with respect to the relative bearing slope of UE in initial time point position according to the UE in the measurement report for network side;
Network side calculate UE direction of motion slope and with the absolute value of the difference of the relative bearing slope of each sub-district, determine that the absolute slope of each base station, the sub-district at the place, base station of absolute slope value minimum are the sub-district of the direction of motion of close UE.
Shown in Fig. 5 A, in the schematic diagram that embodiment of the invention Doppler frequency shift calculates,
UE moves with constant speed v along AA`, supposes that received signal is produced by S.Represent that with Δ t UE moves to the needed time of an A` from an A.Then the increment of radio wave electrical path length is changed to: Δ l=dcos α=-v Δ tcos α, suppose that herein α is the space angle of the input radio wave and the UE direction of motion.Corresponding, phase angle being changed to of an A` place received signal with respect to an A: Δφ = 2 π λ Δl = - 2 πvΔt λ cos α , Wherein λ is a radio wavelength.Then frequency is changed to v = - 1 2 π Δφ Δt = v λ cos α .
Shown in Fig. 5 B, the embodiment of the invention adopts the Doppler frequency shift value to carry out in the schematic diagram of sub-district gravity treatment or switching,
At the A point, UE period measurement sub-district 1, sub-district 2, the radio wave of sub-district 3, and the sub-district 1 that will last time measure, sub-district 2, the performance number of sub-district 3 and frequency values, be designated as (P1, F1) (P2, F2) (P3, F3), with the sub-district 1 of current measurement, sub-district 2, the performance number of sub-district 3 and frequency values are designated as (P1`, F1`) (P2`, F2`) (P3`, F3`), and UE moves to the A` point from A through behind the one-period.
Wherein the power of Ji Suaning can be used for determining whether the sub-district satisfies resident condition, and the frequency values that records then can be used for calculating Doppler frequency shift.
For sub-district 1, the Doppler frequency shift value in the one-period time is: V1=F1`-F1; For sub-district 2, the Doppler frequency shift value in this section period is: V2=F2`-F2; For sub-district 3, the Doppler frequency shift value in this section period is: V3=F3`-F3; The formula of the Doppler frequency shift of mentioning according to Fig. 5 A, we know v = - 1 2 π Δφ Δt = v λ cos α , This moment, movement velocity was in full accord, and wavelength considers that the frequency interval between neighbor cell can be not too wide in the gap, and institute is so that the Doppler frequency shift value is exactly the size that depends on space angle α in the main reason of each minizone generation difference.Compare V1, V2, the size of V3 can be known V1, V2, big more among the V3, represent that the cosine value of space angle of the base station at this place, sub-district and the UE direction of motion is big more, so can determine if V1, V2, the base station at this place, sub-district of big more expression is near the direction of motion of UE among the V3.If V1, V2, have among the V3 for negative value, show that then UE is away from the base station at this place, sub-district.
Shown in Fig. 5 C, the embodiment of the invention adopts positional information to carry out in the schematic diagram of sub-district gravity treatment or switching,
UE moves to an A` from an A, can know that by navigation system UE is expressed as (X respectively in the position of an A and some A` 1, Y 1) and (X 2, Y 2), and the position at peripheral base station place can be known and is respectively (X by broadcasting A, Y A) (X B, Y B) (X C, Y C), 5 points from figure, we can try to achieve the relative bearing of other 4 points with respect to an A, are expressed as with slope k A = Y A - Y 1 X A - X 1 , k B = Y B - Y 1 X B - X 1 , k C = Y C - Y 1 X C - X 1 , k 2 = Y 2 - Y 1 X 2 - X 1 , K wherein A, K B, k CCan think 1,2,3 three base stations with respect to the relative bearing of terminal when some A, and k 2Then can think the direction of motion of terminal, so by comparing k A, k B, k CAnd k 2Value, just can confirm the relative angle of each base station, because the calculating of these slopes all is the position (X with an A with the terminal direction of motion 1, Y 1) calculate for reference point, so as long as with k A, k B, k CAnd k 2Value subtract each other and take absolute value and just can represent the corner dimension of 1,2,3 three base stations and the terminal direction of motion, the more little expression angle of absolute value is more little, then the base station corresponding district of absolute value minimum just can be used as Target cell.If the position of ordering with A` is that reference point is calculated, then can obtain Target cell, but this Target cell not optimal sub-district yet.
In order to reach better effect, can also be in conjunction with the cartographic information of the current location of UE, for example road at UE place and the direction of motion are in conjunction with the coverage information of this sub-district and adjacent sub-district, judge the sub-district that terminal will enter more accurately, thereby select more rational sub-district to carry out resident.
From the foregoing description as can be seen: the embodiment of the invention is when carrying out the sub-district gravity treatment or switching, need to measure the performance number of Serving cell and adjacent sub-district in order to determine whether the sub-district satisfies resident condition, and the direction of motion of definite subscriber equipment, according to the performance number of measuring and the direction of motion of subscriber equipment, the base station that resident condition and its place are satisfied in selection the sub-district of the direction of motion of close subscriber equipment as Target cell, carry out sub-district gravity treatment or switching, thereby reduced the number of times of gravity treatment or switching, eliminate the situation of ping-pong reselection or switching, reduced the burden of network.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims (24)

1, a kind of method of cell reselection of carrying out is characterized in that this method comprises:
The performance number of measuring Serving cell and adjacent sub-district is in order to determine whether the sub-district satisfies resident condition;
Determine the direction of motion of subscriber equipment;
According to the performance number of measuring and the direction of motion of subscriber equipment, the sub-district gravity treatment is carried out as Target cell in the base station of selecting to satisfy resident condition and its place sub-district of the direction of motion of close subscriber equipment.
2, the method for claim 1 is characterized in that, the direction of motion of described definite subscriber equipment specifically comprises:
Measure the frequency values of Serving cell and adjacent sub-district;
Determine the Doppler frequency shift value of sub-district according to the frequency values of twice measurement in front and back;
The size of each sub-district Doppler frequency shift value is relatively determined the sub-district of Doppler frequency shift maximum, and the base station at its place i.e. the direction of motion of close subscriber equipment.
3, method as claimed in claim 2 is characterized in that, described frequency values according to twice measurement in front and back determines that the step of the Doppler frequency shift value of sub-district comprises:
The frequency values of twice measurement in described front and back is poor, with the difference that obtains as the Doppler frequency shift value.
4, the method for claim 1 is characterized in that, the direction of motion of described definite subscriber equipment specifically comprises:
Determine that subscriber equipment is in the positional information of two time points and the positional information of Serving cell and adjacent sub-district;
In the positional information of two time points and the positional information of described Serving cell and base station, place, adjacent sub-district, the position of determining the direction of motion slope of subscriber equipment and each base station, place, sub-district is with respect to the relative bearing slope of subscriber equipment in initial time point position according to described subscriber equipment;
Calculate described subscriber equipment direction of motion slope and with the absolute value of the difference of the relative bearing slope of each sub-district, determine the absolute slope of each base station;
The sub-district at the place, base station of absolute slope value minimum is the sub-district of the direction of motion of close subscriber equipment.
5, a kind of subscriber equipment is characterized in that, this subscriber equipment comprises:
First measurement module is used to measure the performance number of Serving cell and adjacent sub-district in order to determine whether the sub-district satisfies resident condition;
Select module, be used for determining the direction of motion of self;
The gravity treatment module, self the direction of motion that is used for that the performance number measured according to described first measurement module and described selection module determine, selection is satisfied the most close self the sub-district of the direction of motion, the base station at resident condition and its place as Target cell, carries out the sub-district gravity treatment.
6, subscriber equipment as claimed in claim 5 is characterized in that, described selection module comprises:
Second measurement module is used to measure the frequency values of Serving cell and adjacent sub-district;
Setting module is used for determining according to the frequency values of twice measurement before and after described second measurement module Doppler frequency shift value of sub-district;
Comparison module is used for the size of each sub-district Doppler frequency shift value that more described setting module determines, determines the sub-district of Doppler frequency shift maximum, promptly the most close self the direction of motion in the base station at its place.
7, subscriber equipment as claimed in claim 6 is characterized in that, described setting module comprises:
Computing module, it is poor to be used for the frequency values of twice measurement before and after described second measurement module;
Determination module is used for the Doppler frequency shift value of the difference that described computing module is definite as the sub-district.
8, subscriber equipment as claimed in claim 6 is characterized in that, described selection module comprises:
Information module is used for determining certainly in the positional information of two time points and the positional information of Serving cell and adjacent sub-district;
The first slope determination module, be used for according to described from the positional information of two time points and the positional information of described Serving cell and base station, place, adjacent sub-district, determine self direction of motion slope and the position of each base station, place, sub-district with respect to from relative bearing slope in initial time point position;
The second slope determination module, be used to calculate displacement direction slope and with the absolute value of the difference of the relative bearing slope of each sub-district, determine the absolute slope of each base station, the sub-district at the place, base station of described absolute slope value minimum is the most close self the sub-district of the direction of motion.
9, a kind of method of carrying out the sub-district switching is characterized in that this method comprises:
Subscriber equipment is measured the performance number of Serving cell and adjacent sub-district, and determines the parameter of the direction of motion of self, and the measurement report that will comprise the parameter of described performance number and described displacement direction sends to network side;
Described network side is according to the direction of motion parameter of the described subscriber equipment in the described measurement report, determine the direction of motion of described subscriber equipment, and according to the described performance number in the described measurement report and the direction of motion of described subscriber equipment, described subscriber equipment is notified as Target cell in the base station that resident condition and its place are satisfied in the selection sub-district of the direction of motion of close described subscriber equipment;
After described subscriber equipment is received described notice, carry out the sub-district and switch.
10, method as claimed in claim 9 is characterized in that, described subscriber equipment determines that the parameter of the direction of motion of self specifically comprises:
Described subscriber equipment is measured the frequency values of Serving cell and adjacent sub-district, with the described frequency values that the obtains parameter as described displacement direction;
Then described network side determines that the direction of motion of subscriber equipment specifically comprises:
Described network side is determined the Doppler frequency shift value of sub-district according to the frequency values of twice measurement in front and back in the described measurement report, the size that compares each sub-district Doppler frequency shift value, determine the sub-district of Doppler frequency shift maximum, the base station at its place i.e. the direction of motion of close described subscriber equipment.
11, method as claimed in claim 9 is characterized in that, described network side determines that according to the frequency values of twice measurement in described front and back in the described measurement report step of the Doppler frequency shift value of sub-district comprises:
The frequency values of twice measurement before and after described in the described measurement report is poor, with the difference that obtains as the Doppler frequency shift value.
12, method as claimed in claim 9 is characterized in that, described subscriber equipment determines that the parameter of the direction of motion of self specifically comprises:
Described subscriber equipment determines from the positional information of two time points and the positional information of Serving cell and adjacent sub-district, with the positional information that obtains as described self the parameter of the direction of motion;
Then described network side determines that the direction of motion of subscriber equipment specifically comprises:
In the positional information of two time points and the positional information of described Serving cell and base station, place, adjacent sub-district, the position of determining the direction of motion slope of subscriber equipment and each base station, place, sub-district is with respect to the relative bearing slope of subscriber equipment in initial time point position according to the described subscriber equipment in the described measurement report for described network side;
Described network side calculate described subscriber equipment direction of motion slope and with the absolute value of the difference of the relative bearing slope of each sub-district, determine the absolute slope of each base station, the sub-district at the place, base station of absolute slope value minimum is the sub-district of the direction of motion of close described subscriber equipment.
13, a kind of system that carries out the sub-district switching is characterized in that this system comprises:
Subscriber equipment, be used to measure the performance number of Serving cell and adjacent sub-district, and determine the parameter of the direction of motion of self, the measurement report that will comprise the parameter of described performance number and described displacement direction sends to network side, switches according to carry out the sub-district from the notice of the described network equipment;
The network equipment, be used for direction of motion parameter according to the described subscriber equipment of described measurement report, determine the direction of motion of described subscriber equipment, and according to the described performance number in the described measurement report and the direction of motion of described subscriber equipment, described subscriber equipment is notified as Target cell in the base station that resident condition and its place are satisfied in the selection sub-district of the direction of motion of close described subscriber equipment.
14, system as claimed in claim 13 is characterized in that, described subscriber equipment comprises:
First measurement module is used to measure the performance number of Serving cell and adjacent sub-district;
First sending module is used for determining the parameter of displacement direction, and the parameter of described performance number in described first measurement module and described displacement direction is placed described measurement report, sends to the described network equipment;
Handover module is used for switching according to carry out the sub-district from the notice of the described network equipment;
The then described network equipment comprises:
Select module, be used for direction of motion parameter, determine the direction of motion of described subscriber equipment according to the described subscriber equipment of described measurement report;
Processing module, the direction of motion that is used for the described subscriber equipment determined according to the described performance number of described measurement report and described selection module, the base station of selecting to satisfy resident condition and its place the sub-district of the direction of motion of close described subscriber equipment as Target cell;
Notification module is used for the described subscriber equipment of described cell notification that described processing module is determined.
15, system as claimed in claim 14 is characterized in that, described first sending module comprises:
Second measurement module is used to measure the frequency values of Serving cell and adjacent sub-district, with the described frequency values that the obtains parameter as described displacement direction;
Second sending module is used for the described frequency values that the described performance number and described second measurement module of described first measurement module measurement are measured is placed described measurement report, sends to the described network equipment;
Then described selection module comprises:
Setting module is used for determining according to the frequency values of twice measurement in front and back of described measurement report the Doppler frequency shift value of sub-district;
Comparison module is used for the size of each sub-district Doppler frequency shift value that more described setting module determines, determines the sub-district of Doppler frequency shift maximum, and the base station at its place i.e. the direction of motion of close described subscriber equipment.
16, system as claimed in claim 15 is characterized in that, described setting module comprises:
Computing module, it is poor to be used for the frequency values of twice measurement in front and back of described measurement report;
Determination module is used for the Doppler frequency shift value of the difference that described computing module is definite as the sub-district.
17, system as claimed in claim 14 is characterized in that, described first sending module comprises:
Information module is used for determining from the positional information of two time points and the positional information of Serving cell and adjacent sub-district, with the described positional information that the obtains parameter as described displacement direction;
The 3rd sending module, the described performance number and the definite described positional information of described information module that are used for described first measurement module is measured place described measurement report, send to the described network equipment;
Then described selection module comprises:
The first slope determination module, be used for described subscriber equipment according to described measurement report in the positional information of two time points and the positional information of described Serving cell and adjacent sub-district, the position of determining the direction of motion slope of described subscriber equipment and each base station, place, sub-district is with respect to the relative bearing slope of described subscriber equipment in initial time point position;
The second slope determination module, be used to calculate described subscriber equipment direction of motion slope and with the absolute value of the difference of the relative bearing slope of each sub-district, determine the absolute slope of each base station, the sub-district at the place, base station of described absolute slope value minimum is the sub-district of the direction of motion of close described subscriber equipment.
18, a kind of subscriber equipment is characterized in that, this subscriber equipment comprises:
First measurement module is used to measure the performance number of Serving cell and adjacent sub-district;
First sending module is used for determining the parameter of displacement direction, and the parameter of described performance number in described first measurement module and described displacement direction is placed measurement report, sends to the network equipment;
Handover module is used for switching according to carry out the sub-district from the notice of the described network equipment.
19, subscriber equipment as claimed in claim 18 is characterized in that, described first sending module comprises:
Second measurement module is used to measure the frequency values of Serving cell and adjacent sub-district, with the described frequency values that the obtains parameter as described displacement direction;
Second sending module is used for the described frequency values that the described performance number and described second measurement module of described first measurement module measurement are measured is placed described measurement report, sends to the described network equipment.
20, subscriber equipment as claimed in claim 18 is characterized in that, described first sending module comprises:
Information module is used for determining from the positional information of two time points and the positional information of Serving cell and adjacent sub-district, with the described positional information that the obtains parameter as described displacement direction;
The 3rd sending module, the described performance number and the definite described positional information of described information module that are used for described first measurement module is measured place described measurement report, send to the described network equipment.
21, a kind of network equipment is characterized in that, this network equipment comprises:
Select module, be used for the direction of motion parameter of basis, determine the direction of motion of described subscriber equipment from the described subscriber equipment of the measurement report of subscriber equipment;
Processing module, the direction of motion that is used for the described subscriber equipment determined according to the described performance number of described measurement report and described selection module, the base station of selecting to satisfy resident condition and its place the sub-district of the direction of motion of close described subscriber equipment as Target cell;
Notification module is used for the described subscriber equipment of described cell notification that described processing module is determined.
22, the network equipment as claimed in claim 21 is characterized in that, described selection module comprises:
Setting module is used for determining according to the frequency values of twice measurement in front and back of described measurement report the Doppler frequency shift value of sub-district;
Comparison module is used for the size of each sub-district Doppler frequency shift value that more described setting module determines, determines the sub-district of Doppler frequency shift maximum, and the base station at its place i.e. the direction of motion of close described subscriber equipment.
23, the network equipment as claimed in claim 22 is characterized in that, described setting module comprises:
Computing module, it is poor to be used for the frequency values of twice measurement in front and back of described measurement report;
Determination module is used for the Doppler frequency shift value of the difference that described computing module is definite as the sub-district.
24, the network equipment as claimed in claim 21 is characterized in that, described selection module comprises:
The first slope determination module, be used for described subscriber equipment according to described measurement report in the positional information of two time points and the positional information of described Serving cell and adjacent sub-district, the position of determining the direction of motion slope of described subscriber equipment and each base station, place, sub-district is with respect to the relative bearing slope of described subscriber equipment in initial time point position;
The second slope determination module, be used to calculate described subscriber equipment direction of motion slope and with the absolute value of the difference of the relative bearing slope of each sub-district, determine the absolute slope of each base station, the sub-district at the place, base station of described absolute slope value minimum is the sub-district of the direction of motion of close described subscriber equipment.
CNA2007100997176A 2007-05-29 2007-05-29 Method, system and device for community re-selection and switch Pending CN101316400A (en)

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