CN102204344A - Method and terminal for avoiding cell pingpong reselection - Google Patents
Method and terminal for avoiding cell pingpong reselection Download PDFInfo
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Abstract
A method for avoiding cell pingpong reselection is disclosed in the present invention, which comprises: cells which are able to be candidate serving cells are selected, according to an S criteria, from current serving cells and adjacent non-serving cells; an optimal cell is determined, according to an R criteria, from the candidate serving cells; if the optimal cell is not the current serving cell, it is determined that whether the signal intensity and the signal quality of the optimal cell are greater than or equal to reselection thresholds, wherein the reselection thresholds are greater than the minimum serving thresholds of the serving cell; and in the condition that the signal intensity and the signal quality of the optimal cell are greater than or equal to reselection thresholds, the cell reselection is initiated. The embodiments of the present invention also provide a corresponding terminal. Since the reselection thresholds of the cell reselection are increased in the solution of the present invention, the cells with good signal intensity and bad signal quality or the cells with bad signal intensity and good signal quality will not be within the candidate range of the reselection cells, and thus the cell pingpong reselection is avoided to occur frequently effectively.
Description
Technical field
The present invention relates to communication technique field, be specifically related to a kind of method and terminal of avoiding the sub-district ping-pong reselection.
Background technology
Compare traditional speech business, current mobile communication system can provide abundant more class of business.Especially wherein universal mobile telecommunications system (UMTS, Universal MobileTelecommunication System,), mobile communication system as a kind of third generation, it is on the basis of gsm system, adopt Wideband Code Division Multiple Access (WCDMA) access technology (WCDMA, Wideband Code DivisionMultiple Access), can be with speed greater than 21Mbps, for the mobile phone and the terminal user of all parts of the world provides packet-based text, digital speech, video and multi-medium data service.
The UMTS system comprises a core net (CN, Core Network) and a plurality of RNS (RNS, Radio Network Subsystem).RNS has constituted UMTS Terrestrial radio access network (UTRAN, UMTS terrestrial radio access network).Each RNS has a radio network controller (RNC, radio network controller) and a plurality of base-station node (NodeB).Responsible each NodeB distributing radio resource controlled to it of each RNC offers subscriber equipment (UE, User equipment) by NodeB with these Radio Resources.Radio Resource is that the basis is configured with the sub-district, and a sub-district is exactly a zone that Radio Resource covered that NodeB provides.UE sets up the wireless channel of transceive data by the Radio Resource that uses the sub-district, place.
When UE does not set up special-purpose wireless channel,, will trigger a sub-district gravity treatment if it moves to another sub-district from a sub-district.In the process of sub-district gravity treatment, UE measures signal strength signal intensity and the signal quality that receives from neighbor cell, and comparison signal intensity is finally selected a sub-district.The purpose of sub-district gravity treatment is to find the UE can be resident therein and obtain the best cell of service accurately.
In order to carry out the sub-district gravity treatment, UE at first will obtain a neighbor cell list that comprises co-frequency cell, alien-frequency district and different system cell.This tabulation is to obtain by the system information block of receiving on the broadcast channel of Serving cell.Afterwards, UE measures the signal strength signal intensity and the signal quality of these neighbor cells, calculates the signal strength signal intensity S value and the signal quality S value of neighbor cell, and signal strength signal intensity R value or signal quality R value; Signal strength signal intensity S value is the difference of the required lowest signal intensity of the signal strength signal intensity of the neighbor cell measured of UE and cell selecting; Signal quality S value is the difference of the required lowest signal qualities of the signal quality of the neighbor cell measured of UE and cell selecting; Signal strength signal intensity R value is the signal strength measurement of cell selecting and gravity treatment and the difference of sub-district reselection hysteresis signal strength signal intensity; Signal quality R value is the difference of the signal quality measured values and the sub-district reselection hysteresis signal quality of cell selecting and gravity treatment.
Signal strength signal intensity S value and signal quality S value just can enter the ranks of candidate service sub-district all greater than the sub-district of signal strength signal intensity S minimum value and signal quality S minimum value, and signal strength signal intensity S minimum value and signal quality S minimum value are the lowest service thresholdings of Serving cell.
If there are a plurality of sub-districts all to satisfy the requirement of Serving cell, UE will select a best sub-district as Serving cell in these sub-districts.Concrete grammar is, UE judges that by the system information block of receiving signal calculated intensity R value still is a signal quality R value on the broadcast channel of Serving cell, signal strength signal intensity R value or the signal quality R value that calculates sorted according to magnitude relationship, and the sub-district that signal strength signal intensity R value or signal quality R value is maximum is as the Target cell of gravity treatment.
The signal quality of sub-district mainly is by the annoyance level decision of other sub-districts of adopting same frequency.The signal strength signal intensity of sub-district mainly is to be determined apart from the distance of NodeB by UE.Like this, away from the place of NodeB, signal strength signal intensity can be more weak in cell area, if but adopt other sub-district distances of same frequency distant, just smaller from the interference of other sub-districts so, so these places, signal quality might be still relatively good.
If what UE calculated by the judgement of the system information block received on the broadcast channel of Serving cell is signal strength signal intensity R value, after so gravity treatment taking place, UE will enter a Serving cell (being designated as the A sub-district) that signal strength signal intensity is best, but the signal quality of A sub-district very a little less than, so that the A sub-district is after becoming Serving cell, its signal quality S value can not satisfy the requirement of Serving cell signal quality S minimum value, gravity treatment must take place in UE, select a signal quality S value to satisfy the sub-district (being designated as the B sub-district) of Serving cell requirement, in the ensuing time, by calculating to signal strength signal intensity R value, ordering, the A sub-district becomes the sub-district of signal strength signal intensity optimum once more, UE gravity treatment again occurs signal quality S value subsequently again and does not satisfy the Serving cell requirement to the A sub-district, and gravity treatment is to the B sub-district again.Ping-pong has just occurred so repeatedly.
What the judgement of the system information block of receiving on by the broadcast channel at Serving cell as UE was calculated is signal quality R value, after so gravity treatment taking place, UE will enter a Serving cell (being designated as the C sub-district) that signal quality is best, but the signal strength signal intensity of C sub-district very a little less than, so that the C sub-district is after becoming Serving cell, its signal strength signal intensity S value can not satisfy the requirement of Serving cell signal strength signal intensity S minimum value, gravity treatment must take place in UE, select a signal strength signal intensity S value to satisfy the sub-district (being designated as the D sub-district) of Serving cell requirement, the back principle is with epimere A sub-district and B sub-district, and the ping-pong of C sub-district and D sub-district has also occurred.
UE need open radio-frequency (RF) transmit-receive circuit when carrying out the sub-district gravity treatment, receive the system information that NodeB sends on broadcast channel, also needs to open some other circuit logic, to carry out necessary computing.This will increase the UE power consumption, shorten stand-by time.When the gravity treatment of the sub-district of generation ping-pong, power consumption situation will be more serious.Therefore ping-pong reselection need do one's utmost to avoid in UMTS.
For fear of the sub-district gravity treatment that ping-pong takes place, one of existing technical scheme, on the signal strength signal intensity R of Serving cell value or signal quality R value, add amount of hysteresis Qhyst respectively, to deducting amount of bias Qoffset respectively on the signal strength signal intensity R value of adjacent area and the signal quality R value.So that in a single day UE has selected a sub-district as Serving cell, even the signal strength signal intensity R value of Serving cell or signal quality R value are lower than neighbor cell, as long as its difference degree is no more than the amount that Qhyst and Qoffset control, the sub-district gravity treatment can not take place in UE yet.
Prior art scheme two is the restrictions that the sub-district gravity treatment added the time.After the signal strength signal intensity R value of each sub-district or signal quality R value are sorted, if the maximum sub-district of signal strength signal intensity R value or signal quality R value is not a Serving cell, UE does not carry out the sub-district gravity treatment immediately, but the Treselection that waits for a period of time, only in this section Treselection time, the R value of this sub-district is higher than Serving cell always, and UE just carries out the sub-district gravity treatment.
Because all being only UE greater than signal strength signal intensity S minimum value and signal quality S minimum value, signal strength signal intensity S value and signal quality S value can select the necessary condition of a sub-district as Serving cell, if the requirement of Serving cell can not be satisfied, UE must carry out the sub-district gravity treatment immediately.For revise back signal strength signal intensity R value or the maximum sub-district of signal quality R value through prior art scheme one, if its signal strength signal intensity S value and signal quality S value can not satisfy simultaneously greater than signal strength signal intensity S minimum value and signal quality S minimum value, then UE still can not must carry out gravity treatment at once with it as Serving cell.Prior art scheme two is after the sub-district that ordering draws maximum R value is not Serving cell, determine whether to start the frequent generation that method of cell reselection is avoided ping-pong again by increasing stand-by period Treselection, but all being only UE greater than signal strength signal intensity S minimum value and signal quality S minimum value, signal strength signal intensity S value and signal quality S value can select the necessary condition of a sub-district as Serving cell, if its signal strength signal intensity of Serving cell S value and signal quality S value can not satisfy simultaneously greater than signal strength signal intensity S minimum value and signal quality S minimum value, then UE still must carry out new cell selecting immediately, and is not subjected to the restriction of Trelsection.
Summary of the invention
The embodiment of the invention provides a kind of method and terminal of avoiding sub-district ping-pong reselection gravity treatment, can effectively avoid the frequent generation of sub-district ping-pong reselection.
A kind of method of avoiding the sub-district ping-pong reselection comprises:
Selecting from current Serving cell and adjacent non-service cell according to the S criterion can be as the sub-district of candidate service sub-district, and described S criterion is signal strength signal intensity and the signal quality lowest service thresholding more than or equal to Serving cell;
Determine sub-district optimum in the described candidate service sub-district according to the R criterion, described R criterion is for to sort more than or equal to the sub-district of the lowest service thresholding of Serving cell all signal strength signal intensities and signal quality according to signal strength signal intensity or signal quality;
If the sub-district of described optimum is not current Serving cell, whether judge the signal strength signal intensity of the sub-district that this is optimum and signal quality more than or equal to the gravity treatment thresholding, described gravity treatment thresholding is higher than the lowest service thresholding of described Serving cell;
Under the signal strength signal intensity and the situation of signal quality of the sub-district of described optimum, start the sub-district gravity treatment more than or equal to the gravity treatment thresholding.
A kind of terminal comprises:
Selected cell, being used for selecting from current Serving cell and adjacent non-service cell according to the S criterion can be as the sub-district of candidate service sub-district, and described S criterion is signal strength signal intensity and the signal quality lowest service thresholding more than or equal to Serving cell;
Determining unit is used for determining the described optimum sub-district of being selected by selected cell, candidate service sub-district according to the R criterion that described R criterion is for to sort the described candidate service sub-district of being selected by selected cell according to signal strength signal intensity or signal quality;
Judging unit, when the sub-district that is used for the optimum determined in determining unit is not current Serving cell, whether judge the signal strength signal intensity of the sub-district that this is optimum and signal quality more than or equal to the gravity treatment thresholding, described gravity treatment thresholding is higher than the lowest service thresholding of described Serving cell;
The gravity treatment unit is used for starting the sub-district gravity treatment under the signal strength signal intensity and the situation of signal quality more than or equal to the gravity treatment thresholding of the sub-district of the described optimum that judgment unit judges goes out.
The embodiment of the invention has improved the gravity treatment thresholding of sub-district gravity treatment, makes signal strength signal intensity good, but poor signal quality, perhaps difference in signal strength, the sub-district that signal quality is good can not enter candidate's scope of re-selecting cell, thereby has effectively avoided the frequent generation of sub-district ping-pong reselection.
Description of drawings
Fig. 1 is the embodiment one method flow schematic diagram that the embodiment of the invention provides;
Fig. 2 is the embodiment two method flow schematic diagrames that the embodiment of the invention provides;
Fig. 3 is the device embodiment schematic diagram that the embodiment of the invention provides;
Fig. 4 is another embodiment schematic diagram of device that the embodiment of the invention provides.
Embodiment
The embodiment of the invention provides a kind of signal strength signal intensity that can make good, but poor signal quality, perhaps difference in signal strength, and the sub-district that signal quality is good can not enter the method for avoiding the sub-district ping-pong reselection of candidate's scope of re-selecting cell.The embodiment of the invention also provides the terminal of avoiding the sub-district ping-pong reselection accordingly.Below be elaborated respectively.
Embodiment one,
See also Fig. 1, the method for avoiding the sub-district ping-pong reselection that the embodiment of the invention one provides comprises,
101, selecting from current Serving cell and adjacent non-service cell according to the S criterion can be as the sub-district of candidate service sub-district, and the S criterion is signal strength signal intensity and the signal quality lowest service thresholding more than or equal to Serving cell;
Signal strength signal intensity S minimum value and signal quality S minimum value are to satisfy the lowest service thresholding of Serving cell
The S criterion comprises that the signal strength signal intensity S value of sub-district is more than or equal to the signal strength signal intensity S minimum value of Serving cell, and the signal quality S value of sub-district is more than or equal to Serving cell signal quality S minimum value; When having only current Serving cell and the signal strength signal intensity S value in the neighbor cell and signal quality S value all more than or equal to the lowest service thresholding of Serving cell, could be as the candidate service sub-district.
102, determine sub-district optimum in the candidate service sub-district according to the R criterion, the R criterion is for to sort more than or equal to the sub-district of the lowest service thresholding of Serving cell all signal strength signal intensities and signal quality according to signal strength signal intensity or signal quality;
The R criterion comprises, signal strength signal intensity S minimum value and the signal quality S value of all signal strength signal intensity S values more than or equal to Serving cell sorted according to signal strength signal intensity R value or signal quality R value more than or equal to the sub-district of the signal quality S minimum value of Serving cell;
Based on existing communication protocol standard, terminal can be adopted usually and be obtained candidate cell and optimum sub-district in such a way: obtain a neighbor cell list that comprises co-frequency cell, alien-frequency district and different system cell, this tabulation is to obtain by the system information block of receiving on the broadcast channel of Serving cell;
Next terminal is measured the signal strength signal intensity and the signal quality of current service cell and each neighbor cell in the neighbor cell list;
According to signal strength signal intensity that measures and signal quality,, calculate signal strength signal intensity S value and signal quality S value and the signal strength signal intensity R value or the signal quality R value of each neighbor cell by S value and R value computing formula;
The concrete condition of determining sub-district optimum in the candidate service sub-district according to the R criterion is, signal strength signal intensity S value is sorted according to signal strength signal intensity R value or signal quality R value more than or equal to the sub-district of signal quality S minimum value more than or equal to signal strength signal intensity S minimum value and signal quality S value, and wherein the sub-district of signal strength signal intensity R value or signal quality R value value maximum is defined as optimum sub-district;
Terminal signal calculated intensity R value or signal quality R value are that the system information block of receiving on the broadcast channel by Serving cell decides, carry the information of signal calculated intensity R value or signal quality R value on the system information block, and, only carry wherein a kind of information on the system information block, so terminal is only calculated a kind of R value, and also only a kind of R value is sorted.
103, if optimum sub-district is not current Serving cell, whether judge the signal strength signal intensity of the sub-district that this is optimum and signal quality more than or equal to the gravity treatment thresholding, the gravity treatment thresholding is higher than the lowest service thresholding of Serving cell; If more than or equal to the gravity treatment thresholding, execution in step 104, if less than, execution in step 105;
The gravity treatment thresholding comprises signal strength signal intensity S gravity treatment value and signal quality S gravity treatment value, and signal strength signal intensity S gravity treatment value is greater than Serving cell signal strength signal intensity S minimum value, and signal quality S gravity treatment value is greater than Serving cell signal quality S minimum value;
Whether signal strength signal intensity S value and the signal quality S value of judging the sub-district that this is optimum satisfy the gravity treatment thresholding, be specially judge optimum sub-district signal strength signal intensity S value whether more than or equal to the S gravity treatment value of signal strength signal intensity, and whether the signal quality S value of sub-district that also will judge optimum simultaneously more than or equal to the S gravity treatment value of signal quality.
104, under the signal strength signal intensity and the situation of signal quality of the sub-district of described optimum, start the sub-district gravity treatment more than or equal to the gravity treatment thresholding;
The signal strength signal intensity S value and the signal quality S value of optimum sub-district comprise more than or equal to the gravity treatment thresholding: the signal strength signal intensity S value of optimum sub-district is more than or equal to signal strength signal intensity S gravity treatment value, and the signal quality S value of optimum sub-district is more than or equal to signal quality S gravity treatment value; Under the situation that these two conditions satisfy simultaneously, start the sub-district gravity treatment, with the sub-district of optimum Target cell as gravity treatment.
105, if the discontented lumping weight of the signal strength signal intensity S value of optimum sub-district and signal quality S value selects thresholding, do not start the sub-district gravity treatment;
The discontented lumping weight of the signal strength signal intensity S value of optimum sub-district and signal quality S value selects thresholding to comprise three kinds of situations, is specially:
The signal strength signal intensity S value of optimum sub-district is more than or equal to signal strength signal intensity S gravity treatment value, and still, the signal quality S value of optimum sub-district is less than signal quality S gravity treatment value;
The signal strength signal intensity S value of optimum sub-district is less than signal strength signal intensity S gravity treatment value, and still, the signal quality S of optimum sub-district is more than or equal to signal quality S gravity treatment value;
The signal strength signal intensity S value of optimum sub-district is less than signal strength signal intensity S gravity treatment value, and the signal quality S of optimum sub-district is less than signal quality S gravity treatment value;
At above three kinds of situations, terminal does not start the sub-district gravity treatment, continues to reside in current Serving cell.
In the present embodiment, whether the signal strength signal intensity and the signal quality that need to judge optimum sub-district satisfy the gravity treatment thresholding, and the gravity treatment thresholding is higher than the lowest service thresholding of Serving cell; Only signal strength signal intensity and the signal quality in the sub-district of optimum satisfies under the situation of gravity treatment thresholding, just can start the sub-district gravity treatment; With respect to prior art, present embodiment has improved the gravity treatment threshold value of signal strength signal intensity and signal quality, make some signal strength signal intensities fine but signal quality is very poor, perhaps signal quality is fine but candidate's scope that sub-district that signal strength signal intensity is very poor can not enter re-selecting cell has effectively been avoided the generation of ping-pong.
Simultaneously, the minimizing of sub-district ping-pong reselection number of times has also effectively reduced the power consumption of terminal, has prolonged stand-by time.
The foregoing description is to satisfy the gravity treatment thresholding with the signal strength signal intensity of optimum subdistrict and signal quality gravity treatment just takes place is that example describes, in fact, the signal strength signal intensity of optimum subdistrict and signal quality have satisfied the gravity treatment thresholding also can postpone a period of time gravity treatment takes place again, and next the situation to this delay a period of time is described in detail in embodiment two.See also Fig. 2, avoid method second embodiment of sub-district ping-pong reselection to comprise in the embodiment of the invention:
201, selecting from current Serving cell and adjacent non-service cell according to the S criterion can be as the sub-district of candidate service sub-district, and the S criterion is signal strength signal intensity and the signal quality lowest service thresholding more than or equal to Serving cell.
202, determine sub-district optimum in the candidate service sub-district according to the R criterion, the R criterion is for to sort more than or equal to the sub-district of the lowest service thresholding of Serving cell all signal strength signal intensities and signal quality according to signal strength signal intensity or signal quality.
Description about 201 and 202 can be with reference to 101 and 102 among the embodiment one.
203, if optimum sub-district is not current Serving cell, judge that the signal strength signal intensity of the sub-district that this is optimum and signal quality whether more than or equal to the gravity treatment thresholding, also comprise simultaneously starting and check timer, check that the time of timer operation is the review time T that presets;
Review time T can be 1 second to tens seconds a any number, and the numerical value of review time T is adjustable.
204, whether all the time more than or equal to the gravity treatment thresholding, the gravity treatment thresholding is higher than the lowest service thresholding of Serving cell in the time T of checking the timer operation for the signal strength signal intensity S value of the sub-district of judgement optimum and signal quality S value; If in review time T all the time more than or equal to the gravity treatment thresholding, execution in step 205, if not all the time more than or equal to the gravity treatment thresholding, execution in step 206;
Whether signal strength signal intensity and the signal quality of judging optimum sub-district are included in the inspection timer in running time more than or equal to the gravity treatment thresholding all the time in the time T of checking the timer operation, continue to judge that whether the signal strength signal intensity S value of optimum subdistrict is all the time more than or equal to signal strength signal intensity S gravity treatment value, and, continue to judge that whether the signal quality S value of optimum subdistrict is all the time more than or equal to signal quality S gravity treatment value.
205, the signal strength signal intensity S value of Zui You sub-district and signal quality S value satisfy under the situation of gravity treatment thresholding, the step that starts the sub-district gravity treatment is specially: in the time of checking the timer operation, if the signal strength signal intensity of optimum subdistrict and signal quality all the time more than or equal to the gravity treatment thresholding, start the sub-district gravity treatment.
206, in the time of checking the timer operation, the signal strength signal intensity S value of optimum sub-district and signal quality S value are not all the time more than or equal to the gravity treatment thresholding, do not start the sub-district gravity treatment;
The situation that does not satisfy the gravity treatment thresholding all the time comprises three kinds of situations:
The signal strength signal intensity S value of optimum subdistrict is all the time more than or equal to signal strength signal intensity S gravity treatment value, and still, the signal quality S value of optimum subdistrict is not all the time more than or equal to signal quality S gravity treatment value;
The signal strength signal intensity S value of optimum subdistrict is not all the time more than or equal to signal strength signal intensity S gravity treatment value, and still, the signal quality S value of optimum subdistrict is all the time more than or equal to signal quality S gravity treatment value;
The signal strength signal intensity S value of optimum subdistrict is not all the time more than or equal to signal strength signal intensity S gravity treatment value, and the signal quality S value of optimum subdistrict is not also all the time more than or equal to signal quality S gravity treatment value.
For do not have all the time greater than understanding comprise always less than, sometimes greater than sometimes less than.
The embodiment of the invention has also increased a review time T in the signal strength signal intensity of judging optimum sub-district and step that whether signal quality satisfies the gravity treatment thresholding, so just need to continue to judge in review time T, whether the signal strength signal intensity and the signal quality of optimum sub-district satisfy the gravity treatment thresholding all the time, only just the sub-district gravity treatment can take place under situation about satisfying all the time.Like this with respect to prior art, present embodiment has improved the signal strength signal intensity and the signal quality threshold value of gravity treatment, and added review time T, make some signal strength signal intensities fine but signal quality is very poor, perhaps signal quality is fine but candidate's scope that sub-district that signal strength signal intensity is very poor can not enter re-selecting cell has effectively been avoided the generation of ping-pong.
Simultaneously, the minimizing of sub-district ping-pong reselection number of times has also effectively reduced the power consumption of terminal, has prolonged stand-by time.
For ease of understanding, with a concrete application scenarios method of describing in the foregoing description of avoiding the sub-district ping-pong reselection is described in detail below, concrete:
Based on existing communication protocol standard, terminal can be adopted usually and be obtained candidate cell and optimum sub-district in such a way: the system information block that terminal is received from the broadcast channel of Serving cell obtains neighbor cell list, if current Serving cell and 4 neighbor cells are arranged in the neighbor cell list that gets access to, be respectively current Serving cell, sub-district N1, sub-district N2, sub-district N3 and sub-district N4.
Terminal is measured the current Serving cell and the signal strength signal intensity and the signal quality of neighbor cell, signal strength signal intensity and the signal quality of promptly current Serving cell, sub-district N1, sub-district N2, sub-district N3 and sub-district N4.
According to the signal strength signal intensity of the current Serving cell of measuring and each neighbor cell and signal strength signal intensity S value and the signal quality S value that signal quality calculates each sub-district, while signal calculated intensity R value or signal quality R value.Suppose from the information that the system information module gets access to it is the information of signal strength signal intensity, so signal calculated intensity R value.Then result of calculation corresponds to: the signal strength signal intensity S value of current Serving cell is Sr0, and signal quality S value is Sq0, signal strength signal intensity R value Rr0; The signal strength signal intensity S value of sub-district N1 is Sr1, and signal quality S value is Sq1, signal strength signal intensity R value Rr1; The signal strength signal intensity S value of sub-district N2 is Sr2, and signal quality S value is Sq2, signal strength signal intensity R value Rr2; The signal strength signal intensity S value of sub-district N3 is Sr3, and signal quality S value is Sq3, signal strength signal intensity R value Rr3; The signal strength signal intensity S value of sub-district N4 is Sr4, and signal quality S value is Sq4, signal strength signal intensity R value Rr4.
If the signal strength signal intensity S value of the current Serving cell that calculates is Sr0, signal quality S value is Sq0, and the signal strength signal intensity S value of sub-district N1 is Sr1, and signal quality S value is Sq1, the signal strength signal intensity S value of sub-district N2 is Sr2, signal quality S value is Sq2, and the signal strength signal intensity S value of sub-district N3 is Sr3, and signal quality S value is Sq3, the signal strength signal intensity S value of sub-district N4 is Sr4, signal quality S value is Sq4, all satisfies the S criterion, i.e. Sr0, Sr1, Sr2, Sr3 and Sr4 be respectively greater than the minimum value of signal strength signal intensity S, and, Sq0, Sq1, Sq2, Sq3 and Sq4 are respectively greater than the minimum value of signal quality S.Like this, current Serving cell and sub-district N1, sub-district N2, sub-district N3 and sub-district N4 are the candidate service sub-districts.With current Serving cell, sub-district N1, sub-district N2, sub-district N3 and sub-district N4 sort according to signal strength signal intensity R value, promptly to Rr0, and Rr1, Rr2, Rr0 is determined in Rr3 and Rr4 ordering, Rr1, Rr2, the value of maximum among Rr3 and the Rr4, the sub-district that signal strength signal intensity R value is maximum is as the sub-district of optimum, if should use the value maximum of scene Rr2, promptly sub-district N2 is optimum sub-district.
Start and check timer, check that the time of timer operation is the review time T that presets; Begin the lasting magnitude relationship of judging Sr2 value and gravity treatment Sr value from checking that timer starts, and judge the magnitude relationship of Sq2 value and gravity treatment Sq value simultaneously.If in the review time T, the Sr2 value is always more than or equal to gravity treatment Sr value, and the Sq2 value starts gravity treatment so always more than or equal to gravity treatment Sq value, with the Target cell of sub-district N2 as gravity treatment.
If the Sr2 value is not always more than or equal to gravity treatment Sr value, or the Sq2 value is not always more than or equal to gravity treatment Sq value, then do not start gravity treatment, and terminal continues to reside in current Serving cell.For example, signal strength signal intensity Sr2 value is much larger than signal strength signal intensity gravity treatment Sr value, but signal quality Sq2 value just gravity treatment can not take place much smaller than gravity treatment Sq value.So just make signal strength signal intensity good, but the sub-district of poor signal quality can not enter candidate's scope of re-selecting cell, so just effectively avoid the generation of ping-pong.
Should be the condition that current Serving cell and other four neighbor cells all satisfy Serving cell with scene, if the signal strength signal intensity S value of the sub-district N3 that calculates is very big for Sr3, be far longer than signal strength signal intensity S minimum value, but the signal quality S value Sq3 of sub-district N3 is less than signal quality S minimum value, sub-district N3 just can not enter the ranks of candidate service sub-district, if other three neighbor cells all satisfy the S criterion, current service cell also satisfies the S criterion, so to the ordering of signal strength signal intensity R value, can only carry out between sub-district N2 and sub-district N4 at current service cell and sub-district N1.
Introduce below and install embodiment in the embodiment of the invention, see also Fig. 3, the terminal in the embodiment of the invention comprises:
Determining unit 302 is used for according to the definite optimum sub-district of being selected by selected cell 301, candidate service sub-district of R criterion.
When judging unit 303, the sub-district that is used for the optimum determined in determining unit 302 are not current Serving cells, judge that whether the signal strength signal intensity of the sub-district that this is optimum and signal quality are more than or equal to the gravity treatment thresholding.
Terminal in the present embodiment, after selected cell 301 is chosen the candidate service sub-district, determine optimum sub-district by determining unit 302, if optimum sub-district is not current Serving cell, whether the signal strength signal intensity of the sub-district of 303 pairs of optimums of judging unit and signal quality judge more than or equal to the gravity treatment thresholding that the gravity treatment thresholding is higher than the lowest service thresholding of Serving cell.If the signal strength signal intensity of optimum sub-district and signal quality are more than or equal to the gravity treatment thresholding, gravity treatment unit 304 starts the sub-district gravity treatment.If whether the signal strength signal intensity of the sub-district of satisfied optimum and signal quality be more than or equal to the gravity treatment thresholding, continue to reside in current Serving cell, the terminal of this raising gravity treatment thresholding makes some signal strength signal intensities fine but signal quality is very poor, perhaps signal quality is fine but candidate's scope that sub-district that signal strength signal intensity is very poor can not enter re-selecting cell has effectively been avoided the generation of ping-pong.
Consult Fig. 4, the embodiment of the invention can also comprise: check timer 403, be used for starting regularly, and the notice judging unit begins to judge that whether the signal strength signal intensity of optimum subdistrict and signal quality are more than or equal to the gravity treatment thresholding when starting regularly, and the notice judging unit stops to judge that the signal strength signal intensity of optimum subdistrict and signal quality whether more than or equal to the gravity treatment thresholding, check that be the review time T that presets the running time of timer 403 in stop timing.
Correspondingly, judging unit 404 is further used for after determining unit 402 is determined optimum sub-district, judges that whether the signal strength signal intensity and the signal quality of the sub-district of optimum is being checked in the time that timer 403 moves all the time more than or equal to the gravity treatment thresholding;
The lowest service thresholding of Serving cell comprises, signal strength signal intensity S minimum value and signal quality S minimum value;
The S criterion comprises that the signal strength signal intensity S value of sub-district is more than or equal to the signal strength signal intensity S minimum value of Serving cell, and the signal quality S value of sub-district is more than or equal to Serving cell signal quality S minimum value;
The R criterion comprises, signal strength signal intensity S minimum value and the signal quality S value of all signal strength signal intensity S values more than or equal to Serving cell sorted according to signal strength signal intensity R value or signal quality R value more than or equal to the sub-district of the signal quality S minimum value of Serving cell;
The gravity treatment thresholding comprises signal strength signal intensity S gravity treatment value and signal quality S gravity treatment value, and signal strength signal intensity S gravity treatment value is greater than Serving cell signal strength signal intensity S minimum value, and signal quality S gravity treatment value is greater than Serving cell signal quality S minimum value.
Determining unit 402, be further used for signal strength signal intensity S minimum value and the signal quality S value of all signal strength signal intensity S values more than or equal to Serving cell sorted according to signal strength signal intensity R value or signal quality R value more than or equal to the sub-district of the signal quality S minimum value of Serving cell, choose the sub-district of the maximum sub-district of ordering back signal strength signal intensity R value or signal quality R value as optimum.
The concrete course of work of the terminal that the embodiment of the invention provides is, after selected cell 401 is chosen the candidate service sub-district, determine optimum sub-district by determining unit 402, if optimum sub-district is not current Serving cell, start and check timer 403, and notice judging unit 404 begins to judge that whether the signal strength signal intensity of optimum subdistrict and signal quality are more than or equal to the gravity treatment thresholding when starting regularly, and the notice judging unit stops to judge that whether the signal strength signal intensity of optimum subdistrict and signal quality are more than or equal to the gravity treatment thresholding in stop timing, be the review time T that presets the running time of checking timer, if in the running time T of checking timer 403, the signal strength signal intensity of the sub-district that the judging unit 404 lasting results that judge are optimums and signal quality are all the time more than or equal to the gravity treatment thresholding, and gravity treatment unit 405 starts the sub-district gravity treatments.If the signal strength signal intensity of optimum sub-district and signal quality are not to continue more than or equal to the gravity treatment thresholding, continue to reside in current Serving cell, this raising gravity treatment thresholding and device that add to check timer simultaneously make some signal strength signal intensities fine but signal quality is very poor, perhaps signal quality is fine but candidate's scope that sub-district that signal strength signal intensity is very poor can not enter re-selecting cell has effectively been avoided the generation of ping-pong.
One of ordinary skill in the art will appreciate that all or part of step in the whole bag of tricks of the foregoing description is to instruct relevant hardware to finish by program, this program can be stored in the computer-readable recording medium, and storage medium can comprise: ROM, RAM, disk or CD etc.
More than method and the terminal of avoiding sub-district soldier pang gravity treatment that the embodiment of the invention provided are described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. a method of avoiding the sub-district ping-pong reselection is characterized in that, comprising:
Selecting from current Serving cell and adjacent non-service cell according to the S criterion can be as the sub-district of candidate service sub-district, and described S criterion is signal strength signal intensity and the signal quality lowest service thresholding more than or equal to Serving cell;
Determine sub-district optimum in the described candidate service sub-district according to the R criterion, described R criterion is for to sort more than or equal to the sub-district of the lowest service thresholding of Serving cell all signal strength signal intensities and signal quality according to signal strength signal intensity or signal quality;
If the sub-district of described optimum is not current Serving cell, whether judge the signal strength signal intensity of the sub-district that this is optimum and signal quality more than or equal to the gravity treatment thresholding, described gravity treatment thresholding is higher than the lowest service thresholding of described Serving cell;
Under the signal strength signal intensity and the situation of signal quality of the sub-district of described optimum, start the sub-district gravity treatment more than or equal to the gravity treatment thresholding.
2. the method for avoiding the sub-district ping-pong reselection according to claim 1 is characterized in that: describedly judge whether the signal strength signal intensity of the sub-district that this is optimum and signal quality comprise more than or equal to the gravity treatment thresholding:
Start and check timer, the time of described inspection timer operation is the review time T that presets;
Judge the signal strength signal intensity of sub-district of described optimum and signal quality in the time of described inspection timer operation whether all the time more than or equal to the gravity treatment thresholding;
Under the signal strength signal intensity and the situation of signal quality of described sub-district at optimum more than or equal to the gravity treatment thresholding, the step that starts the sub-district gravity treatment comprises: in the time of described inspection timer operation, if the signal strength signal intensity of optimum sub-district and signal quality all the time more than or equal to the gravity treatment thresholding, start the sub-district gravity treatment.
3. the method for avoiding the sub-district ping-pong reselection according to claim 1 and 2 is characterized in that:
The lowest service thresholding of described Serving cell comprises, signal strength signal intensity S minimum value and signal quality S minimum value;
Described S criterion comprises that the signal strength signal intensity S value of sub-district is more than or equal to the signal strength signal intensity S minimum value of Serving cell, and the signal quality S value of sub-district is more than or equal to Serving cell signal quality S minimum value;
Described R criterion comprises, signal strength signal intensity S minimum value and the signal quality S value of all signal strength signal intensity S values more than or equal to Serving cell sorted according to signal strength signal intensity R value or signal quality R value more than or equal to the sub-district of the signal quality S minimum value of Serving cell;
Described gravity treatment thresholding comprises signal strength signal intensity S gravity treatment value and signal quality S gravity treatment value, and described signal strength signal intensity S gravity treatment value is greater than described Serving cell signal strength signal intensity S minimum value, and described signal quality S gravity treatment value is greater than described Serving cell signal quality S minimum value.
4. the method for avoiding the sub-district ping-pong reselection according to claim 3 is characterized in that: describedly determine in the described candidate service sub-district that according to the R criterion optimum sub-district comprises:
Signal strength signal intensity S minimum value and the signal quality S value of all signal strength signal intensity S values more than or equal to Serving cell sorted according to signal strength signal intensity R value or signal quality R value more than or equal to the sub-district of the signal quality S minimum value of Serving cell, choose the sub-district of the maximum sub-district of ordering back signal strength signal intensity R value or signal quality R value as optimum.
5. the method for avoiding the sub-district ping-pong reselection according to claim 3 is characterized in that: the signal strength signal intensity of described sub-district at optimum and signal quality start the sub-district gravity treatment under more than or equal to the situation of gravity treatment thresholding and comprise:
When the signal strength signal intensity S value of the sub-district of described optimum more than or equal to signal strength signal intensity S gravity treatment value, and the signal quality S value of the sub-district of described optimum starts the sub-district gravity treatment during more than or equal to signal quality S gravity treatment value.
6. a terminal is characterized in that, comprising:
Selected cell, being used for selecting from current Serving cell and adjacent non-service cell according to the S criterion can be as the sub-district of candidate service sub-district, and described S criterion is signal strength signal intensity and the signal quality lowest service thresholding more than or equal to Serving cell;
Determining unit is used for determining the described optimum sub-district of being selected by selected cell, candidate service sub-district according to the R criterion that described R criterion is for to sort the described candidate service sub-district of being selected by selected cell according to signal strength signal intensity or signal quality;
Judging unit, when the sub-district that is used for the optimum determined in determining unit is not current Serving cell, whether judge the signal strength signal intensity of the sub-district that this is optimum and signal quality more than or equal to the gravity treatment thresholding, described gravity treatment thresholding is higher than the lowest service thresholding of described Serving cell;
The gravity treatment unit is used for starting the sub-district gravity treatment under the signal strength signal intensity and the situation of signal quality more than or equal to the gravity treatment thresholding of the sub-district of the described optimum that judgment unit judges goes out.
7. terminal according to claim 6 is characterized in that: also comprises,
Check timer, be used for starting regularly, and when starting regularly, notify signal strength signal intensity that described judging unit begins to judge optimum subdistrict and signal quality whether more than or equal to the gravity treatment thresholding, and in stop timing, notify signal strength signal intensity that described judging unit stops to judge optimum subdistrict and signal quality whether more than or equal to the gravity treatment thresholding, be the review time T that presets the running time of described inspection timer;
Described judging unit is further used for after determining unit is determined optimum sub-district, judge the signal strength signal intensity of optimum sub-district and signal quality in the time of described inspection timer operation whether all the time more than or equal to the gravity treatment thresholding;
The gravity treatment unit was further used at described inspection timer in running time, and described judging unit breaks the signal strength signal intensity that optimum subdistrict and signal quality during all the time more than or equal to the gravity treatment thresholding, starts the sub-district gravity treatment.
8. according to claim 6 or 7 described terminals, it is characterized in that:
The lowest service thresholding of described Serving cell comprises, signal strength signal intensity S minimum value and signal quality S minimum value;
Described S criterion comprises that the signal strength signal intensity S value of sub-district is more than or equal to the signal strength signal intensity S minimum value of Serving cell, and the signal quality S value of sub-district is more than or equal to Serving cell signal quality S minimum value;
Described R criterion comprises, signal strength signal intensity S minimum value and the signal quality S value of all signal strength signal intensity S values more than or equal to Serving cell sorted according to signal strength signal intensity R value or signal quality R value more than or equal to the sub-district of the signal quality S minimum value of Serving cell;
Described gravity treatment thresholding comprises signal strength signal intensity S gravity treatment value and signal quality S gravity treatment value, and described signal strength signal intensity S gravity treatment value is greater than described Serving cell signal strength signal intensity S minimum value, and described signal quality S gravity treatment value is greater than described Serving cell signal quality S minimum value.
9. terminal according to claim 8, it is characterized in that: described determining unit, be further used for signal strength signal intensity S minimum value and the signal quality S value of all signal strength signal intensity S values more than or equal to Serving cell sorted according to signal strength signal intensity R value or signal quality R value more than or equal to the sub-district of the signal quality S minimum value of Serving cell, choose the sub-district of the maximum sub-district of ordering back signal strength signal intensity R value or signal quality R value as optimum.
10. terminal according to claim 8, it is characterized in that: described gravity treatment unit, be further used for signal strength signal intensity S value when the sub-district of described optimum more than or equal to signal strength signal intensity S gravity treatment value, and, the signal quality S value of the sub-district of described optimum starts the sub-district gravity treatment during more than or equal to signal quality S gravity treatment value.
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| PCT/CN2011/072910 WO2011103823A2 (en) | 2011-04-18 | 2011-04-18 | Method and terminal for avoiding cell pingpong reselection |
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| CN102204344A true CN102204344A (en) | 2011-09-28 |
| CN102204344B CN102204344B (en) | 2014-03-12 |
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| CN201180000270.7A Active CN102204344B (en) | 2011-04-18 | 2011-04-18 | Method and terminal for avoiding cell pingpong reselection |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2011103823A3 (en) | 2012-04-19 |
| WO2011103823A2 (en) | 2011-09-01 |
| CN102204344B (en) | 2014-03-12 |
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