CN1464644A - Method for measuring movement speed of mobile station in mobile communication system - Google Patents
Method for measuring movement speed of mobile station in mobile communication system Download PDFInfo
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- CN1464644A CN1464644A CN 02112024 CN02112024A CN1464644A CN 1464644 A CN1464644 A CN 1464644A CN 02112024 CN02112024 CN 02112024 CN 02112024 A CN02112024 A CN 02112024A CN 1464644 A CN1464644 A CN 1464644A
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Abstract
The invention discloses a method for measuring the moving speed of the mobile stations in mobile communication system. In order to conduct speed measurement only based on some of the necessary information of the system, the invention can use the varying frequency of the micro subzone base station having the best signal quality measured by the mobile station within an unit time to determine the moving speed of the user, therefore distributing the mobile users of different pattern into the suitable network layers, thus some unnecessary switching is reduced and the system performance is optimized.
Description
Technical field
The present invention mainly is applicable in the mobile communication system that adopts layered cell structure.
Background technology
In the mobile communication, the movement velocity of travelling carriage influences the performance of system, if can accurately estimate the movement velocity of travelling carriage, system configuration and performance all can be greatly improved.Simultaneously, along with the arrival of 3G (Third Generation) Moblie, mobile radio communication will have more strong functions, will adopt the structure of more optimizing aspect network layer for this reason, and layered cell structure will become one of core technology of 3G (Third Generation) Moblie.So-called floored community, be exactly that system is in distributing radio resource, take into full account the optimization of entire system, translational speed faster the user assign to bigger macrocell, and slow user assigns to Microcell, speed threshold becomes an important parameter of system, and speed how easy, that promptly measure current mobile station just becomes a urgent problem.
The measurement of mobile station speed has great influence for the performance of floored community, the patent that also has some to measure about mobile station speed in the floored community at present in the world.For example, patent US5907808, " having the handoff technique that the fast moving user detects between grand/Microcell ".The thought that this piece patent proposes is, is some the Microcell setting-up time threshold value in the system, measures the mobile subscriber and enters a certain Microcell and leave the time interval of this Microcell and enter this Microcell and leave the deflection of this Microcell.When the time interval that records less than the threshold value of setting and enter sub-district and the deflection that leaves this sub-district not simultaneously, then determine that it is the highspeed user.Another patent US6175735B1, " a kind of easy handover scheme in the mobile radio communication ".Similar method above the thought that this piece patent proposes also is based on is promptly by the travelling carriage indirect speed of the measuring user's travelling carriage residence time in the sub-district.Patent WO9818281 for another example, " selecting " based on the communication channel of switching the travelling carriage under the intensity, its main thought is to measure the speed of travelling carriage indirectly according to the parameters such as switching times that travelling carriage has been carried out.
Summary of the invention
Tachometric survey patent in the past generally all is to need to increase other hardware facility, increased cost on the one hand, increased system complexity on the one hand again, for the purpose that can reach tachometric survey, some that can only rely on system again must obligato metrical information, the present invention proposes a kind of change frequency, rather than actual switching times is used as distinguishing rule, the speed of judgement travelling carriage according to the best microcell base station of the measured signal quality of travelling carriage in the unit interval.
In the present invention, its design starting point is, mobile communication system under layered cell structure, in case after a quick user has accepted the service of macro cell base station, so within a certain period of time, its switching times must descend, at this moment if the actual switching times that adopts conventional art to mention is differentiated the words of its speed, just its erroneous judgement might be user at a slow speed, thereby cause vibrating and interlayer (alien frequencies) direct-cut operation between unnecessary load layer; If adopt according to differentiating user moving speed the residence time in the sub-district, then to follow the tracks of its residence time for each user is provided with a timer, increased system consumption and complexity.In order better to adapt to the requirement of 3G (Third Generation) Moblie, the present invention proposes a kind of change frequency according to the best microcell base station of the measured signal quality of travelling carriage in the unit interval (rather than actual switching times) as distinguishing rule, and then judges this user's translational speed.
The present invention specifically comprises a) data maintenance flow process and b) speed differentiation flow process.
Described a) data maintenance flow process concrete steps are as follows:
A-1 at first calls delay procedure, and statistics is the detected signal of mobile subscriber in the process of a delay procedure of operation
Whether top-quality Microcell changes, and every to have moved the T time just clear with statistical variable change_count
Zero, keep up-to-date metrical information statistics in the system;
A-2 judges whether this mobile subscriber institute monitored signal is top-quality small in delay procedure implementation
Variation has taken place in the district, if court verdict is True, then statistical variable change_count is added up 1; Otherwise, statistics
Variable is constant;
A-3 adjudicates whether delay time arrives total period T, if do not arrive total period T, then continues to call delay procedure,
Repeat above-mentioned steps a-1 and a-2; If arrived total period T, then the value of statistical variable change_count is composed
Give global variable count, reenter this data maintenance flow process then, above-mentioned steps a-1, a-2 and a-are carried out in circulation
3；
Described b) speed differentiation flow process concrete steps are as follows:
When b-1 need measure mobile subscriber's speed when system determination, toggle speed judgement flow process was promptly worked as
After the decision_require_event Event triggered satisfies, the admission velocity judgement;
Fast user's the threshold value at a slow speed of differentiation of b-2 mobile subscriber's speed attribute and default in advance
Veloc_threshold does a comparison;
B-3 is if calculated value velocity, thinks then that this travelling carriage is that a fast moving is whole greater than threshold value veloc_threshold
End indicates that then the Boolean type variable UE_velocity_slow_now of mobile subscriber's present speed attribute is set to
False; Otherwise, if calculated value velocity less than threshold value veloc_threshold, thinks that then this travelling carriage is one
Portable terminal at a slow speed then will be indicated the Boolean type variable UE_velocity_slow_now of mobile subscriber's present speed attribute
Be set to True;
After b-4 executes the judgement of user velocity, then give global variable with built-in variable UE_velocity_slow_now assignment
UE_velocity_slow, at this moment, the whole speed judging process that calls specifically is finished, and returns its speed at last
The speed property value UE_velocity_slow that judgement obtains prepares with thinking to switch.
In general, macrocellular is used to handle the business of fast moving vehicle, and microcellulor is handled mobile subscriber at a slow speed, concentrates on the business of walking or room areas such as traffic jam vehicle, market and Office Area.
Basic characteristics of the present invention and advantage are:
1. can avoid travelling carriage being judged by accident user at a slow speed when adopting actual switching times to differentiate mobile station speed
And cause vibrating and interlayer (alien frequencies) direct-cut operation between unnecessary load layer;
2. the present invention proposes under two-layer hierarchical cellular system structure and sets forth, but can be easily with its thought
Be generalized to and adopt in the multilayer layering community mobile communication system, application is extensive;
3. the present invention has avoided loaded down with trivial details design, solves practical problem with the simplest mode, has simplified system, joint
Made an appointment with hardware cost;
4. taken into full account the actual conditions of current communication system, realistic, those skilled in the art just can slap
Hold, the field has a wide range of applications;
5. method is reliable, easy, can make the estimation to mobile station speed quickly and accurately.
Description of drawings
Fig. 1 is two-layer cellular network architecture schematic diagram;
Fig. 2 is the data maintenance schematic flow sheet;
Fig. 3 differentiates schematic flow sheet for speed.
Embodiment
Below we will come further to specify realization thought of the present invention in conjunction with the accompanying drawings.
As shown in Figure 1, system adopts two-layer cellular network architecture, and upper strata macrocell 1 and lower floor's Microcell 2 are united a certain geographic area of covering, and mobile subscriber 3 moves in this floored community.In order to reduce the phase mutual interference, for each layer distributes different frequency bands, to guarantee independent running between each layer (the present invention also can be used for the environment of macrocell, Microcell use same frequency).Certainly, adopting motion velocity of mobile station measurements under the nested floored community communication system of macrocell, Microcell, three layers of sub-district of picocell is similarly, and adopting the above-mentioned parameter configuration is thought of the present invention for convenience of explanation.
Before the speed judgement of travelling carriage is the mobile station data maintenance phase.(by calling delay procedure) checks once whether the microcell base station of current best signal quality changes at set intervals, event memory is in variable change_count afterwards, in addition, in order to reflect up-to-date UE speed, we also are provided with a total period T, T is controlled by the higher limit of delay procedure call number, so the number of times of being stored among the variable change_count of accumulative total in this cycle always.Variable declaration in the accompanying drawing 2 is as follows:
● delay_time represents the number of run of a delay procedure;
● whether on behalf of the Microcell of current best signal quality, best_base_of_microcell_change change
The Boolean type variable;
● change_count represents the change frequency of the microcell base station of current best signal quality;
● the change frequency of count representative microcell base station of current best signal quality in a nearest T.
As shown in Figure 2, at first call delay procedure (square frame 4), the time of delay procedure is adjustable according to actual conditions, whether change in order to the best Microcell of the detected signal quality of mobile subscriber in the process of statistics program when moving a delay_time, whenever, moved the T time, made that total in the system what keep is up-to-date metrical information statistics just with statistical variable change_count zero clearing.
Judge then in a delay_time implementation (judgement 5), whether the top-quality Microcell of this mobile subscriber institute monitored signal variation has taken place, if court verdict is True (variation has taken place the best Microcell of signal quality), 1 (square frame 6) then adds up statistical variable change_count; Otherwise, then not action.
Then adjudicate whether delay time arrives total period T (judgement 8), if do not arrive total period T, then continue to call delay procedure (square frame 7), step after a while is consistent with previous flow process; If arrive total period T, then the value of built-in variable change_count is composed to global variable count (square frame 9), reenter this data maintenance flow process then, promptly enter square frame 4, circulate with this and carry out.System always maintains the up-to-date detection speed relevant information of this mobile subscriber like this, in order to using.
What also need to illustrate a bit is, above-mentioned data maintenance flow process is periodically being carried out in mobile subscriber's communication process always, does not need other interference and is subjected to the influence of other factors.
When the translational speed (promptly producing the incident decision_require_event that the speed judgement is carried out in a request) that needs to differentiate the user was judged by system, the speed of just calling was differentiated flow process (accompanying drawing 3).The change frequency of the microcell base station by the current best signal quality of unit of account in the time (promptly in the time T that obtains in the data maintenance stage microcell base station change frequency count of best signal quality divided by used time T), again this value and decision threshold are made comparisons, return a Boolean UE_velocity_slow who is used to indicate UE speed speed, thus declare mobile subscriber's speed.Variable declaration in the accompanying drawing 3 is as follows:
● velocity is the change frequency of the microcell base station of the current best signal quality in the unit interval;
● the veloc_threshold representative is decision threshold soon/at a slow speed;
● the UE_velocity_slow_now representative characterizes the interim of user velocity attribute in user velocity differentiation flow process
Variable; UE_velocity_slow is the Boolean of indication user velocity speed, and the user is at a slow speed during for true
The user, on the contrary then be quick user.
As shown in Figure 3, when system determination need be measured mobile subscriber's speed, then toggle speed was adjudicated flow process, and promptly after decision_require_event Event triggered (judgement 10) satisfied, admission velocity was adjudicated.Mobile subscriber's speed attribute is by calculating (square frame 11), notice that calculating gained here is not to be mobile subscriber's true velocity value, but a respective value velocity who indicates its velocity amplitude, and then do a comparison (judgement 12) with the fast user's at a slow speed of differentiation of default in advance a threshold value veloc_threshold.If calculated value velocity greater than threshold value veloc_threshold, thinks that then this travelling carriage is a fast moving terminal, indicate that then the Boolean type variable UE_velocity_slow_now of mobile subscriber's present speed attribute is set to False (square frame 13); Otherwise, if calculated value velocity is less than threshold value veloc_threshold, think that then this travelling carriage is a portable terminal at a slow speed, indicate that then the Boolean type variable UE_velocity_slow_now of mobile subscriber's present speed attribute is set to True (square frame 14).After executing the judgement of user velocity, then give global variable UE_velocity_slow (square frame 15) with built-in variable UE_velocity_slow_now assignment, at this moment, the whole speed judging process that calls specifically is finished, and returns the speed property value UE_velocity_slow (square frame 16) that its speed judgement obtains at last.
Like this in the system for the mobile subscriber kept its to move attribute be up-to-date court verdict all the time, the actions of carrying out possibly for the mobile subscriber such as switching provide necessary assurance.
Should be noted that in this invention application process in the mobile communication system that adopts layered cell structure, when the Current Serving BTS of UE was Microcell, what UE carried out was common frequency measurement; When the Current Serving BTS of portable terminal (UE) was macrocell, what UE carried out was different-frequency measure.In both cases, because the difference of UE translational speed and performed metering system difference, in order to cycle of differentiating UE speed attribute also difference to some extent.
In the present invention, can be according to actual count governing speed threshold value veloc_threshold as a result, thereby realize differentiation for the mobile subscriber of friction speed section, in elaborate process of the present invention, only at soon, two kinds of mobile terminal styles are divided at a slow speed, if this kind thought is applied, in actual application, can reach the purpose of distinguishing multi-level speed type user, thereby can be applied among the mobile communication of multitiered network.For example, in the mobile communications network that is divided into macrocell, Microcell and picocell, just can realize the portable terminal division of three class speed user types according to this kind thought, thereby, dissimilar mobile subscribers is assigned in its corresponding suitable networks level goes, reduce unnecessary switching, optimized systematic function.
Claims (7)
1, a kind of method of measurement of motion velocity of mobile station in the mobile communication system, it is characterized in that, comprise a) data maintenance flow process and b) speed differentiation flow process, described a) data maintenance flow process concrete steps are as follows: a-1 at first calls delay procedure, whether statistics best Microcell of the detected signal quality of mobile subscriber in the process of a delay procedure of operation changes, whenever, moved the T time, kept up-to-date metrical information statistics in the system just with statistical variable change_count zero clearing; A-2 judges whether variation has taken place the top-quality Microcell of this mobile subscriber institute monitored signal, if court verdict is True, then statistical variable change_count is added up 1 in delay procedure implementation; Otherwise statistical variable is constant; A-3 adjudicates whether delay time arrives total period T, if do not arrive total period T, then continues to call delay procedure, repeats above-mentioned steps a-1 and a-2; If arrive total period T, then the value of statistical variable change_count is composed to global variable count, reenter this data maintenance flow process then, above-mentioned steps a-1, a-2 and a-3 are carried out in circulation; Described b) speed differentiation flow process concrete steps are as follows: when b-1 need measure mobile subscriber's speed when system determination, and toggle speed judgement flow process, promptly after the decision_require_event Event triggered satisfied, admission velocity was adjudicated; B-2 mobile subscriber's speed attribute and comparison of a threshold value veloc_threshold do of the fast user at a slow speed of differentiation of default in advance; B-3 indicates that then the Boolean type variable UE_velocity_slow_now of mobile subscriber's present speed attribute is set to False if calculated value velocity greater than threshold value veloc_threshold, thinks that then this travelling carriage is a fast moving terminal; Otherwise,, indicate that then the Boolean type variable UE_velocity_slow_now of mobile subscriber's present speed attribute is set to True if calculated value velocity less than threshold value veloc_threshold, thinks that then this travelling carriage is a portable terminal at a slow speed; After b-4 executes the judgement of user velocity, then give global variable with built-in variable UE_velocity_slow_now assignment
UE_velocity_slow, at this moment, the whole speed judging process that calls specifically is finished, and returns its speed at last
The speed property value UE_velocity_slow that judgement obtains prepares with thinking to switch.
2, a kind of method of measurement of motion velocity of mobile station in the mobile communication system as claimed in claim 1, it is further characterized in that, adopt in the mobile communication system of layered cell structure, when the Current Serving BTS of UE was Microcell, what UE carried out was common frequency measurement; When the Current Serving BTS of UE was macrocell, what UE carried out was different-frequency measure.
3, a kind of method of measurement of motion velocity of mobile station in the mobile communication system as claimed in claim 1, it is further characterized in that described data maintenance flow process is periodically being carried out always in mobile subscriber's communication process.
4, a kind of method of measurement of motion velocity of mobile station in the mobile communication system as claimed in claim 1, it is further characterized in that each floored community distributes different frequency bands, independent running between each layer.
5, a kind of method of measurement of motion velocity of mobile station in the mobile communication system as claimed in claim 1, it is further characterized in that above-mentioned method of measurement also can be used for the environment that same frequency is used in each sub-district.
6, a kind of method of measurement of motion velocity of mobile station in the mobile communication system as claimed in claim 1, it is further characterized in that, above-mentioned method of measurement is applicable to that also the motion velocity of mobile station that adopts under the nested floored community communication system of macrocell, Microcell, three layers of sub-district of picocell measures.
7, a kind of method of measurement of motion velocity of mobile station in the mobile communication system as claimed in claim 1, it is further characterized in that, described system adopts the mobile communication system of layered cell structure, the sub-district of different size is overlapped, the closely adjacent and existence simultaneously in the base station of different transmission power, whole communication network is multi-level structure, and every kind of honeycomb carried out predefined function.
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| CN 02112024 CN1221148C (en) | 2002-06-11 | 2002-06-11 | Method for measuring movement speed of mobile station in mobile communication system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100479596C (en) * | 2005-04-29 | 2009-04-15 | 中国科学院上海微***与信息技术研究所 | Sorted switching method for wireless mobile communication system |
| CN101437243B (en) * | 2007-11-16 | 2010-09-29 | 大唐移动通信设备有限公司 | Method and apparatus for measuring motion velocity of mobile station |
| CN1750437B (en) * | 2004-09-14 | 2010-11-03 | 日本电气株式会社 | Data processing unit, data processing method and data processing system |
| CN101911747A (en) * | 2008-01-16 | 2010-12-08 | 日本电气株式会社 | Method for controlling access to a mobile communications network |
| WO2011130997A1 (en) * | 2010-04-22 | 2011-10-27 | 中兴通讯股份有限公司 | Method and apparatus for estimating motion speed of terminal |
| CN103079252A (en) * | 2011-10-26 | 2013-05-01 | 宏碁股份有限公司 | Method for establishing network connection of wireless mobile device |
| US9439124B2 (en) | 2012-08-10 | 2016-09-06 | Huawei Technologies Co., Ltd. | Mobility control method and apparatus |
| WO2019113757A1 (en) * | 2017-12-11 | 2019-06-20 | 北京小米移动软件有限公司 | Method and device for determining moving speed of user equipment, base station and user equipment |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100426920C (en) * | 2004-09-02 | 2008-10-15 | 中兴通讯股份有限公司 | Method for measuring mobile station speed in mobile communication system |
-
2002
- 2002-06-11 CN CN 02112024 patent/CN1221148C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1750437B (en) * | 2004-09-14 | 2010-11-03 | 日本电气株式会社 | Data processing unit, data processing method and data processing system |
| CN100479596C (en) * | 2005-04-29 | 2009-04-15 | 中国科学院上海微***与信息技术研究所 | Sorted switching method for wireless mobile communication system |
| CN101437243B (en) * | 2007-11-16 | 2010-09-29 | 大唐移动通信设备有限公司 | Method and apparatus for measuring motion velocity of mobile station |
| CN101911747A (en) * | 2008-01-16 | 2010-12-08 | 日本电气株式会社 | Method for controlling access to a mobile communications network |
| WO2011130997A1 (en) * | 2010-04-22 | 2011-10-27 | 中兴通讯股份有限公司 | Method and apparatus for estimating motion speed of terminal |
| CN103079252A (en) * | 2011-10-26 | 2013-05-01 | 宏碁股份有限公司 | Method for establishing network connection of wireless mobile device |
| CN103079252B (en) * | 2011-10-26 | 2015-07-29 | 宏碁股份有限公司 | Portable wireless device sets up the method for network on-line |
| US9439124B2 (en) | 2012-08-10 | 2016-09-06 | Huawei Technologies Co., Ltd. | Mobility control method and apparatus |
| WO2019113757A1 (en) * | 2017-12-11 | 2019-06-20 | 北京小米移动软件有限公司 | Method and device for determining moving speed of user equipment, base station and user equipment |
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| CN1221148C (en) | 2005-09-28 |
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