CN102448069A - Soft frequency reusing method and device based on cognitive technology and base station - Google Patents
Soft frequency reusing method and device based on cognitive technology and base station Download PDFInfo
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Abstract
The invention provides a soft frequency reusing method and device based on a cognitive technology and a base station. The method comprises the following steps of: configuring frequency points to be distributed in a cell as a preferable frequency point set and configuring distributed frequency points of a neighboring cell of the cell as an optional frequency point set; judging whether resources which can be distributed exists in the preferable frequency point set or not; if so, distributing the frequency points in the preferable frequency point set to a mobile terminal; otherwise, distributing the frequency points in the optional frequency point set to the mobile terminal. through adoption of the soft frequency reusing method and device based on the cognitive technology and the base station, provided by the invention, a concept of a center and edges of the cell is broken through, the current frequency points of a user are sequenced through judging neighboring cell measurement information reported by the user and the frequency points with low same frequency interference are selected for access, therefore the same frequency interference is assured, and higher frequency utilization rate is realized.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of soft-frequency reuse method, a kind of soft frequency device and a kind of base station based on cognitive techniques based on cognitive techniques.
Background technology
As everyone knows, the frequency spectrum resource of cordless communication network is limited all the time, and the user's bandwidth demand constantly increases.Also Just because of this, channeling becomes a kind of means that use " limited " frequency spectrum resource solves " infinitely " capacity problem.The method of traditional channeling shown in Fig. 1 (a), is to be unit with the sub-district, between co-frequency cell, keeps certain distance to resist with disturbing frequently, and the distance of co-frequency cell has determined the height of frequency efficiency; When capacity requirement increased, shown in Fig. 1 (b), radius of society reduced, and frequency efficiency improves; Shown in Fig. 1 (c), when radius of society was reduced to a certain degree, apart from reaching the upper limit, frequency efficiency also reached the upper limit with frequently.
The major defect of above-mentioned legacy frequencies multiplexing method is: channeling is based on the sub-district, and the interference cases of the inner zones of different in sub-district is different, yet this method can only be according to worst situation (normally cell edge) decision multiplex distance.
In order to solve this contradiction, industry has proposed the notion of soft-frequency reuse, and is as shown in Figure 2, and this method makes up the framework of a kind of " concentric circles ", and interior circle is a center of housing estate, and cylindrical is a cell edge, and interior circle adopts auxilliary carrier wave, and cylindrical adopts main carrier; The auxilliary carrier wave in minizone is with frequently multiplexing to realize, minizone main carrier alien frequencies disturbs with opposing.
But there is following shortcoming in this soft-frequency reuse method based on inside and outside circle when improving frequency efficiency:
One, the judgement of interior circle and cylindrical is inaccurate.Judge that UE is in interior circle or cylindrical, a kind of method is the power detection of being carried out current area by UE, when performance number is worth greater than certain, just thinks to be in interior circle, otherwise is in cylindrical; A kind of in addition method is to detect the neighboring BS information of UE, when the power of at least one adjacent area during greater than threshold value, thinks to be in cylindrical, otherwise is in interior circle.But above two kinds of methods all can only be carried out rough judgement, can't define inside and outside circle accurately;
Two, the selection of frequency reuse plan is too single, and non-that is this usually, and the notion of bandwidth assignment similar " concentric circles " has only two kinds of selections of " interior circle " and " cylindrical ".And, can't further segment for cylindrical zone cell edge region just.For example in the adjacent area, right side of a certain sub-district frequency resource in " the cylindrical right side area " of this sub-district though can't be multiplexing, being actually in " cylindrical left field " can be multiplexing, but conventional soft-frequency reuse method can't be accomplished this point.
Have based on this, in cordless communication network, need a kind of method of better raising frequency efficiency badly.
Summary of the invention
The present invention provides a kind of soft-frequency reuse method, device and base station based on cognitive techniques, can realize higher frequency efficiency.
A kind of soft-frequency reuse method based on cognitive techniques may further comprise the steps:
The frequency to be allocated that disposes in this sub-district is preferred frequency collection, and the frequency of distribution that disposes this adjacent area, sub-district is the selectable frequency point set;
Judge that the concentrated resource that whether exists of said preferred frequency can supply to distribute;
If the frequency that then distributes said preferred frequency to concentrate is given portable terminal;
If the frequency that, does not then distribute said selectable frequency point to concentrate is given portable terminal.
A kind of soft-frequency reuse device based on cognitive techniques comprises:
Configuration module, the frequency to be allocated that is used for disposing this sub-district is that preferred frequency collection and the frequency of distribution that disposes this adjacent area, sub-district are the selectable frequency point set;
With the judge module that said configuration module is connected, be used to judge that the concentrated resource that whether exists of said preferred frequency can supply to distribute;
The preferred frequency collection distribution module that is connected with said judge module is used for concentrating and existing resource can supply the branch timing when judging said preferred frequency, and the frequency that distributes said preferred frequency to concentrate is given portable terminal;
The selectable frequency point set distribution module that is connected with said judge module is used for concentrating and not existing resource can supply the branch timing when judging said preferred frequency, distributes frequency that said selectable frequency point concentrates to portable terminal.
A kind of base station comprises the above-mentioned soft-frequency reuse device based on cognitive techniques.
Can find out through above scheme; Soft-frequency reuse method, device and base station based on cognitive techniques of the present invention; Broken the notion at center of housing estate and edge; The frequency set is divided into preferred frequency collection and selectable frequency point set, and the frequency of when preferably frequency fund-raising source is not limited, selecting preferred frequency to concentrate all the time distributes, and divides the concentrated frequency of selectable frequency point of matched adjacent zone to give portable terminal in case preferred frequency fund-raising source is limited.This frequency that peripheral cell actual interference value is lower has also been included multiplexing scope in to each frequency point allocation way that inserts user's " customization ", has not only guaranteed with interference frequently, and has realized higher frequency efficiency.
Description of drawings
Fig. 1 is traditional frequency multiplexing method sketch map;
Fig. 2 is the soft-frequency reuse method sketch map based on inside and outside circle;
Fig. 3 is the soft-frequency reuse method flow sketch map that the present invention is based on cognitive techniques;
Fig. 4 is based on the soft-frequency reuse method sketch map of cognitive techniques in the specific embodiment;
Fig. 5 is the structural representation that the present invention is based on the soft-frequency reuse device of cognitive techniques.
Embodiment
The present invention provides a kind of soft-frequency reuse method, device and base station based on cognitive techniques, can solve the lower problem of prior art medium frequency utilance.Describe specific embodiment of the present invention in detail below in conjunction with accompanying drawing.
A kind of soft-frequency reuse method based on cognitive techniques, as shown in Figure 3, may further comprise the steps:
The frequency to be allocated that disposes in this sub-district is preferred frequency collection, and the frequency of distribution that disposes this adjacent area, sub-district is the selectable frequency point set;
Judge that the concentrated resource that whether exists of said preferred frequency can supply to distribute;
If the frequency that then distributes said preferred frequency to concentrate is given portable terminal;
If the frequency that, does not then distribute said selectable frequency point to concentrate is given portable terminal.
As an embodiment preferably; The frequency that the said selectable frequency point of above-mentioned distribution is concentrated specifically can comprise for the process of portable terminal: portable terminal is measured the signal strength signal intensity of each adjacent area in real time in moving process; This sub-district then receives the said portable terminal signal strength information of each adjacent area of measurement in real time; And the signal strength signal intensity of each adjacent area sorted; The frequency that will be lower than the adjacent area of preset threshold value is then listed frequency to be selected in, gives portable terminal according to the resource situation and the best frequency point allocation of signal strength signal intensity sequencing selection of said frequency to be selected.
In order to help to understand the present invention, do further to describe below in conjunction with 4 pairs of schemes of the present invention of accompanying drawing.As shown in Figure 4, the square region of central authorities is represented the some sub-districts in the network, other sub-districts (being the adjacent area) of this sub-district periphery of ellipse Regional Representative, and the signal of other sub-districts can produce interference to this sub-district.Then the step to the soft-frequency reuse of this sub-district can be described below:
One, dispose the preferred frequency collection and the selectable frequency point set of this sub-district, because f1 has been that peripheral cell (adjacent area) is used to the f4 frequency, f5 is blank frequency, confirms that therefore the former is the selectable frequency point set, and the latter is preferred frequency collection;
Whether two, careless at the beginning portable terminal is at first asked f5 frequency in that position of square region, judge to exist resource can supply to distribute (minimum because this frequency disturbs) among the said preferred frequency collection f5;
If exist resource can supply to distribute among three f5, then preferentially select the f5 frequency point allocation to give portable terminal, algorithm finishes;
If do not exist resource can supply to distribute among four f5, promptly the resource of f5 frequency is all occupied, and the frequency that distributes this moment selectable frequency point to concentrate is given portable terminal, and detailed process comprises:
1), portable terminal is measured the signal strength signal intensity of each adjacent area in real time, and measurement result is sent to this sub-district.
2), sort to the signal strength signal intensity of each adjacent area in this sub-district.When for example portable terminal moved to the f4 in the square region, this moment, ordering was to the measurement result of each adjacent area frequency: f1 was the strongest, and f2/f3 takes second place, f4 a little less than;
3), a measurement result and a preset threshold value are compared, and the frequency that will be lower than the adjacent area of preset threshold value lists frequency to be selected in, then according to the resource situation of said frequency to be selected and the best frequency point allocation of signal strength signal intensity sequencing selection to portable terminal.That is: f1, f2, f3, f4 and preset threshold value are relatively found to have only the signal strength signal intensity of f3 and f4 to be lower than said threshold value in the back, then list these two frequencies in frequency to be selected, and weed out f1 and f2.As an embodiment preferably; Follow-up assigning process specifically can for: according to the ordering situation; In said frequency to be selected, select signal strength signal intensity the most weak frequency (f4) distribute; Certainly need judge also before distributing whether this frequency exists resource can supply to distribute, if just distribute this frequency to give portable terminal, then algorithm finishes; If this most weak frequency f4 does not exist resource can supply to distribute; So obviously, can not select this frequency to distribute; Can continue then to judge whether signal strength signal intensity time weak frequency (f3) exists resource can supply to distribute in the said frequency to be selected, if then distribute this frequency to give portable terminal.Only enumerated the situation of having only f3 and f4 in the frequency to be selected in the present embodiment; But need to understand: the selectable frequency point set of some sub-districts is a lot of in the specific operation process; Therefore the frequency concentrated of qualified frequency to be selected also a lot (more than two); In this case; Adopt above-mentioned similar method (promptly resource situation and the signal strength signal intensity according to said frequency to be selected sorts) to judge down that successively finally can select a best frequency and distribute to portable terminal, then algorithm finishes.In a word, portable terminal under the prerequisite that resource can be used, according to from preferably to optional, signal order is from weak to strong selected.
If concentrate at said selectable frequency point, signal strength signal intensity is lower than in the frequency (frequency to be selected) of threshold value does not all have available resources can supply to distribute, because the signal strength signal intensity of other frequencies is higher than threshold value, so resource allocation is failed, portable terminal is rejected so.This situation only just can take place under the very high situation of capacity, and the frequency resource of sub-district can't satisfy capacity requirement, so the refusal portable terminal inserts, is normal situation.
Preferably, the signal strength information of said each adjacent area is that the form with measurement report sends to this sub-district by said portable terminal, and judging the disturbed condition of each adjacent area on the current location, and this measurement report is exactly the foundation that soft-frequency reuse is carried out in this sub-district.
Corresponding with method of the present invention, the present invention also provides a kind of soft-frequency reuse device based on cognitive techniques, and is as shown in Figure 5, comprising:
Configuration module, the frequency to be allocated that is used for disposing this sub-district is that preferred frequency collection and the frequency of distribution that disposes this adjacent area, sub-district are the selectable frequency point set;
With the judge module that said configuration module is connected, be used to judge that the concentrated resource that whether exists of said preferred frequency can supply to distribute;
The preferred frequency collection distribution module that is connected with said judge module is used for concentrating and existing resource can supply the branch timing when judging said preferred frequency, and the frequency that distributes said preferred frequency to concentrate is given portable terminal;
The selectable frequency point set distribution module that is connected with said judge module is used for concentrating and not existing resource can supply the branch timing when judging said preferred frequency, distributes frequency that said selectable frequency point concentrates to portable terminal.
As an embodiment preferably; Above-mentioned selectable frequency point set distribution module can comprise the measurement distribution module; The signal strength information that is used for each adjacent area that mobile terminal receive measures in real time; Signal strength signal intensity to each adjacent area sorts, and the frequency that will be lower than the adjacent area of preset threshold value is then listed frequency to be selected in, and gives portable terminal according to the resource situation and the best frequency point allocation of signal strength signal intensity sequencing selection of said frequency to be selected.
As an embodiment preferably; Said measurement distribution module can comprise that first judges distribution module; This module is used for selecting the most weak frequency of signal strength signal intensity at said frequency to be selected, judges whether this frequency exists resource can supply to distribute, if then distribute this frequency to give portable terminal.
In addition; Said measurement distribution module can also comprise with said first judges the second judgement distribution module that distribution module is connected; This module be used for when said first judge distribution module judge said signal strength signal intensity the most weak frequency do not exist resource can supply the branch timing; Judge whether signal strength signal intensity time weak frequency exists resource can supply to distribute in the said frequency to be selected, if then distribute this frequency to give portable terminal.By that analogy, till in said frequency to be selected, selecting best frequency point allocation and giving portable terminal, perhaps be exactly in the frequency to be selected all frequencies all do not have available resources can supply to distribute, then return the resource allocation failure, portable terminal is rejected.
In addition, the present invention also provides a kind of base station, and it has comprised above-mentioned soft-frequency reuse device based on cognitive techniques.
Can find out that through above scheme soft-frequency reuse method, device and base station based on cognitive techniques of the present invention have following characteristics:
One, method of the present invention, device and base station select the low frequency that disturbs with frequency to carry out multiplexing cell edge frequency point selection and interference hook.This way of passing through the real-time measurement result decision frequency point selection of portable terminal has cognitive characteristics.The nearby region measurement of portable terminal carries out in real time; The judgement of algorithm of the present invention also so is in real time carried out; Guaranteed the mobility of portable terminal; The real-time change of network can both be adapted to by algorithm of the present invention, so the present invention adopted utilizes the nearby region measurement result to judge the method that periphery disturbs, and has characteristics such as outstanding accuracy and real-time;
Two, the restriction of the inside and outside circle in the conventional soft-frequency reuse method has been broken in method of the present invention, device and base station, has also broken the notion at center of housing estate and edge, carries out channeling according to actual interference situation, can improve frequency efficiency;
Three, in satisfactory frequency, select the weak person of signal strength signal intensity, these characteristics have guaranteed that portable terminal selected to disturb minimum frequency in all satisfactory frequencies, the best quality that this makes portable terminal obtain it to access;
Four, report is screened according to threshold value to the nearby region measurement of portable terminal, and when the measure signal intensity of frequency during greater than thresholding, this frequency is not as frequency to be selected.These characteristics have guaranteed that the interference that portable terminal receives always is lower than certain level (because the frequency of overflow is all disallowable), has promptly guaranteed the minimum quality of portable terminal acknowledge(ment) signal;
Five, the multiplexing frequency point selection of cell edge is relevant with the peripheral cell disturbed condition of receiving; It (possibly be f1 that different frequency point selection can appear in different cell edge positions; Also possibly be f2), the inside and outside circle multiplexing method in this and the conventional softer frequency multiplexing method obviously difference comes.These characteristics also provide the channeling degree higher than inside and outside circle method except better signal quality is provided.Such as, in the method for " inside and outside circle ", be example with the f2 frequency among Fig. 2, the sub-district of cylindrical use f2 frequency can not be adjacent, and the channeling of f2 is wanted 1 sub-district at interval at least so; But in the method for the invention; Even the f2 frequency uses in neighbor cell; Some specific region of this sub-district still can be used; Therefore the channeling of f2 need not sub-district at interval, so just can also include multiplexing scope in by the frequency that peripheral cell actual interference value is lower, and channeling degree also therefore of the present invention will be apparently higher than the soft-frequency reuse method of routine;
Six, method of the present invention, device and base station mainly are applicable to gsm system.Use the GSM capacity covering system of the present invention's technology to have outstanding TCH with frequently disturbing low advantage and the outstanding high advantage of the availability of frequency spectrum.
Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any modification of within spirit of the present invention and principle, being done, be equal to replacement and improvement etc., all should be included within the claim protection range of the present invention.
Claims (10)
1. the soft-frequency reuse method based on cognitive techniques is characterized in that, may further comprise the steps:
The frequency to be allocated that disposes in this sub-district is preferred frequency collection, and the frequency of distribution that disposes this adjacent area, sub-district is the selectable frequency point set;
Judge that the concentrated resource that whether exists of said preferred frequency can supply to distribute;
If the frequency that then distributes said preferred frequency to concentrate is given portable terminal;
If the frequency that, does not then distribute said selectable frequency point to concentrate is given portable terminal.
2. the soft-frequency reuse method based on cognitive techniques according to claim 1; It is characterized in that; The frequency that said distribution selectable frequency point is concentrated comprises for the detailed process of portable terminal: this sub-district receives the signal strength information of each adjacent area of being measured in real time by portable terminal; And the signal strength signal intensity of each adjacent area sorted; The frequency that will be lower than the adjacent area of preset threshold value is then listed frequency to be selected in, gives portable terminal according to the resource situation and the best frequency point allocation of signal strength signal intensity sequencing selection of said frequency to be selected.
3. the soft-frequency reuse method based on cognitive techniques according to claim 2; It is characterized in that; Said resource situation and the best frequency point allocation of signal strength signal intensity sequencing selection according to said frequency to be selected specifically comprises for the process of portable terminal: in said frequency to be selected, select the most weak frequency of signal strength signal intensity; Judge whether this frequency exists resource can supply to distribute, if then distribute this frequency to give portable terminal.
4. the soft-frequency reuse method based on cognitive techniques according to claim 3; It is characterized in that; If the most weak frequency of said signal strength signal intensity does not exist resource can supply to distribute; Judge then whether signal strength signal intensity time weak frequency exists resource can supply to distribute in the said frequency to be selected, if then distribute this frequency to give portable terminal.
5. according to any described soft-frequency reuse method of claim 1-4, it is characterized in that the signal strength information of said each adjacent area sends to this sub-district with the form of measurement report by said portable terminal based on cognitive techniques.
6. the soft-frequency reuse device based on cognitive techniques is characterized in that, comprising:
Configuration module, the frequency to be allocated that is used for disposing this sub-district is that preferred frequency collection and the frequency of distribution that disposes this adjacent area, sub-district are the selectable frequency point set;
With the judge module that said configuration module is connected, be used to judge that the concentrated resource that whether exists of said preferred frequency can supply to distribute;
The preferred frequency collection distribution module that is connected with said judge module is used for concentrating and existing resource can supply the branch timing when judging said preferred frequency, and the frequency that distributes said preferred frequency to concentrate is given portable terminal;
The selectable frequency point set distribution module that is connected with said judge module is used for concentrating and not existing resource can supply the branch timing when judging said preferred frequency, distributes frequency that said selectable frequency point concentrates to portable terminal.
7. the soft-frequency reuse device based on cognitive techniques according to claim 6; It is characterized in that; Said selectable frequency point set distribution module comprises the measurement distribution module, is used for the signal strength information of each adjacent area that mobile terminal receive measures in real time, and the signal strength signal intensity of each adjacent area is sorted; The frequency that will be lower than the adjacent area of preset threshold value is then listed frequency to be selected in, and gives portable terminal according to the resource situation and the best frequency point allocation of signal strength signal intensity sequencing selection of said frequency to be selected.
8. the soft-frequency reuse device based on cognitive techniques according to claim 7; It is characterized in that; Said measurement distribution module comprises that first judges distribution module; Be used for selecting the most weak frequency of signal strength signal intensity, judge whether this frequency exists resource can supply to distribute, if then distribute this frequency to give portable terminal at said frequency to be selected.
9. the soft-frequency reuse device based on cognitive techniques according to claim 8; It is characterized in that; Said measurement distribution module also comprises with said first judges the second judgement distribution module that distribution module is connected; Be used for when said first judge distribution module judge said signal strength signal intensity the most weak frequency do not exist resource can supply the branch timing, judge whether signal strength signal intensity time weak frequency exists resource can supply to distribute in the said frequency to be selected, if then distribute this frequency to give portable terminal.
10. a base station is characterized in that, comprises the described soft-frequency reuse device based on cognitive techniques in any top of claim 6-9.
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| CN103997377A (en) * | 2013-02-16 | 2014-08-20 | 意法-爱立信有限公司 | Measuring method of received signal code power, device and user terminal |
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Owner name: JINGXIN COMMUNICATION SYSTEM CO LTD (GUANGZHOU) Free format text: FORMER OWNER: COMBA TELECOM SYSTEMS (CHINA) CO., LTD. Effective date: 20150821 |
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Effective date of registration: 20150821 Address after: 510663 Guangdong city of Guangzhou province Guangzhou economic and Technological Development Zone Jinbi Road No. 6 Patentee after: Comba Telecom Systems (Guangzhou) Co., Ltd. Address before: 510663 Guangzhou Science City, Guangzhou, Shenzhou Road, No. 10, Guangdong Patentee before: Comba Telecom System (China) Co., Ltd. |
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Effective date of registration: 20200108 Address after: 510663 Shenzhou Road 10, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangzhou, Guangdong Patentee after: Jingxin Communication System (China) Co., Ltd. Address before: 510663, No. 6, Jin Lu, Guangzhou economic and Technological Development Zone, Guangdong, Guangzhou Patentee before: Jingxin Communication System (Guangzhou) Co., Ltd. |
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Address after: 510663 Shenzhou Road 10, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangzhou, Guangdong Patentee after: Jingxin Network System Co.,Ltd. Address before: 510663 Shenzhou Road 10, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangzhou, Guangdong Patentee before: Comba Telecom System (China) Ltd. |
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