CN102204344B - Method and terminal for avoiding cell pingpong reselection - Google Patents

Method and terminal for avoiding cell pingpong reselection Download PDF

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Publication number
CN102204344B
CN102204344B CN201180000270.7A CN201180000270A CN102204344B CN 102204344 B CN102204344 B CN 102204344B CN 201180000270 A CN201180000270 A CN 201180000270A CN 102204344 B CN102204344 B CN 102204344B
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China
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value
community
signal
signal strength
described
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CN201180000270.7A
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Chinese (zh)
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CN102204344A (en
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刘珺
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华为技术有限公司
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Priority to PCT/CN2011/072910 priority Critical patent/WO2011103823A2/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0083Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists

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

A kind of method and terminal of avoiding cell pingpong reselection

Technical field

The present invention relates to communication technique field, be specifically related to a kind of method and terminal of avoiding cell pingpong reselection.

Background technology

Compare traditional speech business, current mobile communication system, can provide abundanter 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 to be greater than the speed of 21Mbps, for mobile phone and the terminal user of all parts of the world provides packet-based text, digital speech, video and multi-medium data service.

UMTS system comprises a core net (CN, Core Network) and a plurality of RNS (RNS, Radio Network Subsystem).RNS has formed 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).Each NodeB distributing radio resource that each RNC is responsible for controlling to it, offers subscriber equipment (UE, User equipment) by NodeB by these Radio Resources.The ,Yi Ge community that Radio Resource Shi Yi community is configured for basis is exactly the region that the Radio Resource that provides of a NodeB covers.UE is by setting up the wireless channel of transceiving data with the Radio Resource of community, place.

When UE does not set up special-purpose wireless channel, if its Cong Yige community moves to another community, will trigger cell reselection one time.In the process of cell reselection, UE measures signal strength signal intensity and the signal quality receiving from neighbor cell, and comparison signal intensity, finally selects Yi Ge community.The object of cell reselection is to find accurately a UE can be therein resident and obtain the best cell of service.

In order to carry out cell reselection, first UE will obtain a neighbor cell list that comprises co-frequency cell, He Yi system cell, alien-frequency district.This list is that the system information block by receiving on the broadcast channel of Serving cell obtains.Afterwards, UE measures signal strength signal intensity and the signal quality of these neighbor cells, calculates 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 signal strength signal intensity of the neighbor cell measured of UE and the difference that required lowest signal intensity is selected in community; Signal quality S value is the signal quality of the neighbor cell measured of UE and the difference that required lowest signal qualities is selected in community; Signal strength signal intensity R Zhi Shi community is selected and the signal strength measurement of gravity treatment and the difference of the sluggish signal strength signal intensity of cell reselection; Signal quality R Zhi Shi community is selected and the signal quality measured values of gravity treatment and the difference of the sluggish signal quality of cell reselection.

Signal strength signal intensity S value and signal quality S value are all greater than the community of signal strength signal intensity S minimum value and signal quality S minimum value, just can enter the ranks of candidate service community, 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 communities all to meet the requirement of Serving cell, UE will select a best community as Serving cell in these communities.Concrete grammar is, UE is judged and is calculated signal strength signal intensity R value or signal quality R value by the system information block of receiving on the broadcast channel of Serving cell, the signal strength signal intensity R value calculating or signal quality R value are sorted according to magnitude relationship, using signal strength signal intensity R value or the maximum community of signal quality R value as the Target cell of gravity treatment.

The signal quality of community is mainly by adopting the annoyance level of other communities of same frequency to determine.The signal strength signal intensity of community is mainly to be determined apart from the distance of NodeB by UE.Like this, in cell area, away from the place of NodeB, signal strength signal intensity can be more weak, if but adopt other community distances of same frequency distant, just smaller from the interference of other communities so, so these places, signal quality is likely 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, occur so after gravity treatment, UE will enter a Serving cell (being designated as A community) that signal strength signal intensity is best, but the signal quality of A community very a little less than, so that A community is after becoming Serving cell, its signal quality S value can not meet the requirement of Serving cell signal quality S minimum value, must there is gravity treatment in UE, select a signal quality S value to meet the community (being designated as B community) that Serving cell requires, in the ensuing time, by the calculating to signal strength signal intensity R value, sequence, A community becomes the community of signal strength signal intensity optimum again, UE again gravity treatment arrives A community, occur again that subsequently signal quality S value does not meet Serving cell requirement, gravity treatment is to B community again.Ping-pong has just occurred so repeatedly.

What the judgement of the system information block of receiving on by the broadcast channel in Serving cell as UE was calculated is signal quality R value, occur so after gravity treatment, UE will enter a Serving cell (being designated as C community) that signal quality is best, but the signal strength signal intensity of C community very a little less than, so that C community is after becoming Serving cell, its signal strength signal intensity S value can not meet the requirement of Serving cell signal strength signal intensity S minimum value, must there is gravity treatment in UE, select a signal strength signal intensity S value to meet the community (being designated as D community) that Serving cell requires, principle is with epimere A community and B community below, the ping-pong of C community and D community has also occurred.

UE, when carrying out cell reselection, need to open radio-frequency (RF) transmit-receive circuit, receives 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 UE power consumption, shorten stand-by time.When there is the cell reselection of ping-pong, power consumption situation will be more serious.Therefore ping-pong reselection need to do one's utmost to avoid in UMTS.

For fear of the cell reselection that ping-pong occurs, one of existing technical scheme, in the signal strength signal intensity R of Serving cell value or signal quality R value, add respectively amount of hysteresis Qhyst, to deducting respectively amount of bias Qoffset in the signal strength signal intensity R value of adjacent area and signal quality R value.Once so that UE selects Liao Yige community as Serving cell, being no more than even if the signal strength signal intensity R value of Serving cell or signal quality R value lower than neighbor cell, need only its difference degree the amount that Qhyst and Qoffset control, can there is not cell reselection in UE yet.

Prior art scheme two is cell reselection to be added to the restriction of time.After the signal strength signal intensity R value to each community or signal quality R value sort, if the Bu Shi Serving cell, community that signal strength signal intensity R value or signal quality R value are maximum, UE does not carry out cell reselection immediately, but the Treselection that waits for a period of time, only at this section of Treselection in the time, the R value of this community is always higher than Serving cell, and UE just carries out cell reselection.

Because signal strength signal intensity S value and signal quality S value are all greater than signal strength signal intensity S minimum value and signal quality S minimum value, are only UE and can select Yi Ge community as the necessary condition of Serving cell, if the requirement of Serving cell can not meet, UE must carry out cell reselection immediately.For signal strength signal intensity R value or the maximum community of signal quality R value after prior art scheme one is revised, if can not meeting, its signal strength signal intensity S value and signal quality S value be greater than signal strength signal intensity S minimum value and signal quality S minimum value simultaneously, UE still can not, by it as Serving cell, must carry out gravity treatment at once.Prior art scheme two is to draw behind Bu Shi Serving cell, maximum R Zhi community in sequence, the method that determines again whether to start cell reselection by increasing stand-by period Treselection is avoided the frequent generation of ping-pong, but can signal strength signal intensity S value and signal quality S value be all greater than signal strength signal intensity S minimum value and signal quality S minimum value and be only UE and select Yi Ge community as the necessary condition of Serving cell, if can not meeting, Serving cell its signal strength signal intensity S value and signal quality S value be greater than signal strength signal intensity S minimum value and signal quality S minimum value simultaneously, UE still must carry out the selection of Xin community immediately, and be not subject to the restriction of Trelsection.

Summary of the invention

The embodiment of the present invention provides a kind of method and terminal of avoiding cell pingpong reselection gravity treatment, can effectively avoid the frequent generation of cell pingpong reselection.

A method of avoiding cell pingpong reselection, comprising:

According to S criterion, from current Serving cell and adjacent non-service cell, selecting can be as the community of candidate service community, and described S criterion is the lowest service thresholding that signal strength signal intensity and signal quality are more than or equal to Serving cell;

According to R criterion, determine in described candidate service community optimum community, described R criterion sorts according to signal strength signal intensity or signal quality for all signal strength signal intensities and signal quality being more than or equal to the community of the lowest service thresholding of Serving cell;

If the community of described optimum is not current Serving cell, judge whether the signal strength signal intensity of the community that this is optimum and signal quality are more than or equal to gravity treatment thresholding, and described gravity treatment thresholding is higher than the lowest service thresholding of described Serving cell;

In the situation that the signal strength signal intensity of the community of described optimum and signal quality are more than or equal to gravity treatment thresholding, start cell reselection.

A terminal, comprising:

Selected cell, for according to S criterion from current Serving cell and select can be as the community of candidate service community in adjacent non-service cell, described S criterion is the lowest service thresholding that signal strength signal intensity and signal quality are more than or equal to Serving cell;

Determining unit, for determine optimum community, the described candidate service community of being selected by selected cell according to R criterion, described R criterion is for to sort the described candidate service community of being selected by selected cell according to signal strength signal intensity or signal quality;

Judging unit, while not being current Serving cell for the optimum community of determining in determining unit, whether the signal strength signal intensity and the signal quality that judge the community that this is optimum are more than or equal to gravity treatment thresholding, and described gravity treatment thresholding is higher than the lowest service thresholding of described Serving cell;

Gravity treatment unit, in the situation that the signal strength signal intensity of the community of the described optimum that judging unit is judged and signal quality are more than or equal to gravity treatment thresholding, starts cell reselection.

The embodiment of the present invention has improved the gravity treatment thresholding of cell reselection, makes signal strength signal intensity good, but poor signal quality, or difference in signal strength, signal quality Hao community, can not enter candidate's scope of re-selecting cell, thereby has effectively avoided the frequent generation of cell pingpong reselection.

Accompanying drawing explanation

Fig. 1 is the embodiment mono-method flow schematic diagram that the embodiment of the present invention provides;

Fig. 2 is the embodiment bis-method flow schematic diagrames that the embodiment of the present invention provides;

Fig. 3 is the device embodiment schematic diagram that the embodiment of the present invention provides;

Fig. 4 is another embodiment schematic diagram of device that the embodiment of the present invention provides.

Embodiment

The embodiment of the present invention provides a kind of signal strength signal intensity that can make good, but poor signal quality, or difference in signal strength, and signal quality Hao community can not enter the method for avoiding cell pingpong reselection of candidate's scope of re-selecting cell.The embodiment of the present invention also provides the terminal of avoiding accordingly cell pingpong reselection.Below be elaborated respectively.

Embodiment mono-,

Refer to Fig. 1, the method for avoiding cell pingpong reselection that the embodiment of the present invention one provides, comprises,

101, according to S criterion, from current Serving cell and adjacent non-service cell, selecting can be as the community of candidate service community, and S criterion is the lowest service thresholding that signal strength signal intensity and signal quality are more than or equal to Serving cell;

Signal strength signal intensity S minimum value and signal quality S minimum value are the lowest service thresholdings that meets Serving cell

S criterion comprises, the signal strength signal intensity S value of community is more than or equal to the signal strength signal intensity S minimum value of Serving cell, and the signal quality S value of community is more than or equal to Serving cell signal quality S minimum value; While only having current Serving cell and the signal strength signal intensity S value in neighbor cell and signal quality S value to be all more than or equal to the lowest service thresholding of Serving cell, could be as candidate service community.

102, according to R criterion, determine in candidate service community optimum community, R criterion sorts according to signal strength signal intensity or signal quality for all signal strength signal intensities and signal quality being more than or equal to the community of the lowest service thresholding of Serving cell;

R criterion comprises, all signal strength signal intensity S values is more than or equal to the signal strength signal intensity S minimum value of Serving cell and sort according to signal strength signal intensity R value or signal quality R value in the community of the signal quality S minimum value that signal quality S value is more than or equal to Serving cell;

Based on existing communication protocol standard, terminal conventionally can be adopted and be obtained in such a way candidate cell and optimum community: obtain a neighbor cell list that comprises co-frequency cell, He Yi system cell, alien-frequency district, this list is that the system information block by receiving on the broadcast channel of Serving cell obtains;

Next terminal is measured signal strength signal intensity and the signal quality of He Ge neighbor cell, current service cell in neighbor cell list;

According to the signal strength signal intensity measuring and signal quality, by S value and R value computing formula, calculate signal strength signal intensity S value and signal quality S value and signal strength signal intensity R value or the signal quality R value of each neighbor cell;

The concrete condition of determining community optimum in candidate service community according to R criterion is, signal strength signal intensity S value is more than or equal to the community that signal strength signal intensity S minimum value and signal quality S value be more than or equal to signal quality S minimum value and according to signal strength signal intensity R value or signal quality R value, sorts, wherein the community of signal strength signal intensity R value or signal quality R value value maximum is defined as optimum community;

Terminal is calculated signal strength signal intensity R value or signal quality R value is that the system information block of receiving on the broadcast channel by Serving cell decides, on system information block, carry the information of calculating signal strength signal intensity R value or signal quality R value, and, on system information block, only carry wherein a kind of information, so terminal is only calculated a kind of R value, and also only a kind of R value is sorted.

If 103 optimum communities are not current Serving cells, judge whether the signal strength signal intensity of the community that this is optimum and signal quality are more than or equal to gravity treatment thresholding, and gravity treatment thresholding is higher than the lowest service thresholding of Serving cell; If be more than or equal to gravity treatment thresholding, perform step 104, if be less than, perform step 105;

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 the signal strength signal intensity S value and the signal quality S value that judge the community that this is optimum meet gravity treatment thresholding, be specially and judge whether the signal strength signal intensity S value of optimum community is more than or equal to the S gravity treatment value of signal strength signal intensity, and also will judge whether the signal quality S value of optimum community is more than or equal to the S gravity treatment value of signal quality simultaneously.

104,, in the situation that the signal strength signal intensity of the community of described optimum and signal quality are more than or equal to gravity treatment thresholding, start cell reselection;

The signal strength signal intensity S value of optimum community and signal quality S value are more than or equal to gravity treatment thresholding and comprise: the signal strength signal intensity S value of optimum community is more than or equal to signal strength signal intensity S gravity treatment value, and the signal quality S value of optimum community is more than or equal to signal quality S gravity treatment value; In the situation that these two conditions are simultaneously satisfied, start cell reselection, the Target cell using optimum community as gravity treatment.

If the discontented lumping weight of the signal strength signal intensity S value of the community of 105 optimums and signal quality S value selects thresholding, do not start cell reselection;

The discontented lumping weight of the signal strength signal intensity S value of optimum community and signal quality S value selects thresholding to comprise three kinds of situations, is specially:

The signal strength signal intensity S value of optimum community is more than or equal to signal strength signal intensity S gravity treatment value, and still, the signal quality S value of optimum community is less than signal quality S gravity treatment value;

The signal strength signal intensity S value of optimum community is less than signal strength signal intensity S gravity treatment value, and still, the signal quality S of optimum community is more than or equal to signal quality S gravity treatment value;

The signal strength signal intensity S value of optimum community is less than signal strength signal intensity S gravity treatment value, and the signal quality S of optimum community is less than signal quality S gravity treatment value;

For above three kinds of situations, terminal does not start cell reselection, continues to reside in current Serving cell.

In the present embodiment, need to judge whether the signal strength signal intensity of optimum community and signal quality meet gravity treatment thresholding, and gravity treatment thresholding is higher than the lowest service thresholding of Serving cell; Only, in the situation that the signal strength signal intensity of optimum community and signal quality meet gravity treatment thresholding, just can start cell reselection; With respect to prior art, the present embodiment has improved the gravity treatment threshold value of signal strength signal intensity and signal quality, make that some signal strength signal intensities are fine but signal quality is very poor, or signal quality is fine but candidate's scope that community that signal strength signal intensity is very poor can not enter re-selecting cell has effectively been avoided the generation of ping-pong.

Meanwhile, the minimizing of cell pingpong reselection number of times has also effectively reduced the power consumption of terminal, has extended stand-by time.

Above-described embodiment is to take the signal strength signal intensity of optimum subdistrict and signal quality to meet gravity treatment thresholding and gravity treatment just occurs describe as example, in fact, the signal strength signal intensity of optimum subdistrict and signal quality have met gravity treatment thresholding also can postpone a period of time gravity treatment occurs again, next in embodiment bis-, the situation of this delay a period of time is described in detail.Refer to Fig. 2, in the embodiment of the present invention, avoid method second embodiment of cell pingpong reselection to comprise:

201, according to S criterion, from current Serving cell and adjacent non-service cell, selecting can be as the community of candidate service community, and S criterion is the lowest service thresholding that signal strength signal intensity and signal quality are more than or equal to Serving cell.

202, according to R criterion, determine in candidate service community optimum community, R criterion sorts according to signal strength signal intensity or signal quality for all signal strength signal intensities and signal quality being more than or equal to the community of the lowest service thresholding of Serving cell.

Description about 201 and 202 can be with reference to 101 and 102 in embodiment mono-.

If 203 optimum communities are not current Serving cells, judge whether the signal strength signal intensity of the community that this is optimum and signal quality are more than or equal to gravity treatment thresholding, also comprise start-up check timer simultaneously, check that the time of timer operation is preset review time T;

Review time T can be any number of 1 second to tens seconds, and the numerical value of review time T is adjustable.

204, judge whether the signal strength signal intensity S value of optimum community and signal quality S value are more than or equal to all the time gravity treatment thresholding in the time T that checks timer operation, and gravity treatment thresholding is higher than the lowest service thresholding of Serving cell; If be more than or equal to all the time gravity treatment thresholding in review time T, perform step 205, if not be more than or equal to all the time gravity treatment thresholding, perform step 206;

Judge whether the signal strength signal intensity of optimum community and signal quality are more than or equal to all the time gravity treatment thresholding and are included in and check that timer is in running time in the time T that checks timer operation, continue to judge whether the signal strength signal intensity S value of optimum subdistrict is more than or equal to signal strength signal intensity S gravity treatment value all the time, and, continue to judge whether the signal quality S value of optimum subdistrict is more than or equal to signal quality S gravity treatment value all the time.

205, signal strength signal intensity S value and the signal quality S value of optimum community meet in the situation of gravity treatment thresholding, the step that starts cell reselection is specially: checking in the time of timer operation, if the signal strength signal intensity of optimum subdistrict and signal quality are more than or equal to gravity treatment thresholding all the time, start cell reselection.

206, checking that, in the time of timer operation, signal strength signal intensity S value and the signal quality S value of optimum community are not to be more than or equal to all the time gravity treatment thresholding, do not start cell reselection;

The situation that does not meet all the time gravity treatment thresholding comprises three kinds of situations:

The signal strength signal intensity S value of optimum subdistrict is more than or equal to signal strength signal intensity S gravity treatment value all the time, and still, the signal quality S value of optimum subdistrict is not more than or equal to signal quality S gravity treatment value all the time;

The signal strength signal intensity S value of optimum subdistrict is not more than or equal to signal strength signal intensity S gravity treatment value all the time, and still, the signal quality S value of optimum subdistrict is more than or equal to signal quality S gravity treatment value all the time;

The signal strength signal intensity S value of optimum subdistrict is not more than or equal to signal strength signal intensity S gravity treatment value all the time, and the signal quality S value of optimum subdistrict is not more than or equal to signal quality S gravity treatment value all the time yet.

For the understanding not being greater than all the time, comprise always and being less than, be sometimes greater than sometimes and be less than.

The embodiment of the present invention has also increased a review time T when judging the signal strength signal intensity of optimum community and step that whether signal quality meets gravity treatment thresholding, so just need to continue judgement in review time T, whether signal strength signal intensity and the signal quality of optimum community meet gravity treatment thresholding all the time, only satisfied all the time in the situation that, just cell reselection can occur.Like this with respect to prior art, the present embodiment has improved signal strength signal intensity and the signal quality threshold value of gravity treatment, and added review time T, make that some signal strength signal intensities are fine but signal quality is very poor, or signal quality is fine but candidate's scope that community that signal strength signal intensity is very poor can not enter re-selecting cell has effectively been avoided the generation of ping-pong.

Meanwhile, the minimizing of cell pingpong reselection number of times has also effectively reduced the power consumption of terminal, has extended stand-by time.

For ease of understanding, with a concrete application scenarios, the method for avoiding cell pingpong reselection of describing in above-described embodiment is described in detail below, concrete:

Based on existing communication protocol standard, terminal conventionally can be adopted and be obtained in such a way candidate cell and optimum community: the system information block that terminal is received from the broadcast channel of Serving cell obtains neighbor cell list, if have current Serving cell and 4 neighbor cells in the neighbor cell list getting, be respectively current Serving cell, N3He community, N2, community, N1, community, community N4.

Terminal is measured signal strength signal intensity and the signal quality of current Serving cell and neighbor cell, i.e. signal strength signal intensity and the signal quality of current Serving cell, N3He community, N2, community, N1, community, community 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 community, calculate signal strength signal intensity R value or signal quality R value simultaneously.Suppose that the information getting from system information module is the information of signal strength signal intensity, calculates signal strength signal intensity R value so.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 community 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 community 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 community 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 community 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 calculating is Sr0, signal quality S value is Sq0, the signal strength signal intensity S value of community N1 is Sr1, signal quality S value is Sq1, the signal strength signal intensity S value of community N2 is Sr2, signal quality S value is Sq2, the signal strength signal intensity S value of community N3 is Sr3, signal quality S value is Sq3, the signal strength signal intensity S value of community N4 is Sr4, signal quality S value is Sq4, all meet S criterion, be Sr0, Sr1, Sr2, Sr3 and Sr4 are greater than respectively the minimum value of signal strength signal intensity S, and, Sq0, Sq1, Sq2, Sq3 and Sq4 are greater than respectively the minimum value of signal quality S.Like this, current Serving cell and N3He community, N2, community, N1, community, community N4 are candidate service communities.By current Serving cell, N1, community, community N2, N3He community, community N4 sorts according to signal strength signal intensity R value, to Rr0, and Rr1, Rr2, Rr3 and Rr4 sequence, determine Rr0, Rr1, Rr2, maximum value in Rr3 and Rr4, using the maximum community of signal strength signal intensity R value as optimum community, if the maximum ,Ji community N2 of the value of this application scene Rr2 is optimum community.

Start-up check timer, checks that the time of timer operation is preset review time T; From checking that timer starts the magnitude relationship that starts to continue judgement Sr2 value and gravity treatment Sr value, and judge the magnitude relationship of Sq2 value and gravity treatment Sq value simultaneously.If in review time T, Sr2 value is more than or equal to gravity treatment Sr value always, and Sq2 value is more than or equal to gravity treatment Sq value always, starts so gravity treatment ,Jiang community N2 as the Target cell of gravity treatment.

If Sr2 value is not to be more than or equal to gravity treatment Sr value always, or Sq2 value is not to be more than or equal to gravity treatment Sq value always, 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 is much smaller than gravity treatment Sq value, just gravity treatment can not occur.So just make signal strength signal intensity good, but the community of poor signal quality can not enter candidate's scope of re-selecting cell, so just effectively avoid the generation of ping-pong.

This application scene is the condition that current Serving cell and other four neighbor cells all meet Serving cell, if the signal strength signal intensity S value of the community N3 calculating is that Sr3 is very large, be far longer than signal strength signal intensity S minimum value, but the signal quality S value Sq3 of community N3 is less than signal quality S minimum value, community N3 just can not enter the ranks of candidate service community, if other three neighbor cells all meet S criterion, current service cell also meets S criterion, sequence to signal strength signal intensity R value so, can only between current service cell and N1, community, community N2He community N4, carry out.

Introduce below in the embodiment of the present invention and install embodiment, refer to Fig. 3, the terminal in the embodiment of the present invention comprises:

Selected cell 301, for according to S criterion from current Serving cell and select can be as the community of candidate service community in adjacent non-service cell.

Determining unit 302, for determining the optimum community, candidate service community of being selected by selected cell 301 according to R criterion.

Judging unit 303, while not being current Serving cell for the optimum communities of determining in determining unit 302, judges whether the signal strength signal intensity of the community that this is optimum and signal quality are more than or equal to gravity treatment thresholding.

Gravity treatment unit 304, in the situation that the signal strength signal intensity of the optimum community of being judged by judging unit 303 and signal quality are more than or equal to gravity treatment thresholding, starts cell reselection.

Terminal in the present embodiment, selected cell 301 is chosen behind candidate service community, by determining unit 302, determine optimum community, if optimum community is not current Serving cell, whether the signal strength signal intensity of 303 pairs of optimum communities of judging unit and signal quality are more than or equal to gravity treatment thresholding judges, gravity treatment thresholding is higher than the lowest service thresholding of Serving cell.If signal strength signal intensity and the signal quality of optimum community are more than or equal to gravity treatment thresholding, gravity treatment unit 304 starts cell reselection.If do not meet signal strength signal intensity and the signal quality of optimum community, whether be not more than or equal to gravity treatment thresholding, continue to reside in current Serving cell, the terminal of this raising gravity treatment thresholding makes that some signal strength signal intensities are fine but signal quality is very poor, or signal quality is fine but candidate's scope that community 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 present invention can also comprise: check timer 403, be used for starting regularly, and notify judging unit to start to judge whether the signal strength signal intensity of optimum subdistrict and signal quality are more than or equal to gravity treatment thresholding when starting regularly, and in stop timing, notify judging unit to stop judging whether the signal strength signal intensity of optimum subdistrict and signal quality are more than or equal to gravity treatment thresholding, check that be preset review time T the running time of timer 403.

Correspondingly, judging unit 404, is further used for determining behind optimum community in determining unit 402, judges whether the signal strength signal intensity of optimum community and signal quality are more than or equal to all the time gravity treatment thresholding within the time that checks timer 403 operations;

Gravity treatment unit 405, is further used for checking that timer is in 403 running times, when judging unit 404 is judged the signal strength signal intensity of optimum subdistrict and signal quality and is more than or equal to all the time gravity treatment thresholding, starts cell reselection.

The lowest service thresholding of Serving cell comprises, signal strength signal intensity S minimum value and signal quality S minimum value;

S criterion comprises, the signal strength signal intensity S value of community is more than or equal to the signal strength signal intensity S minimum value of Serving cell, and the signal quality S value of community is more than or equal to Serving cell signal quality S minimum value;

R criterion comprises, all signal strength signal intensity S values is more than or equal to the signal strength signal intensity S minimum value of Serving cell and sort according to signal strength signal intensity R value or signal quality R value in the community of the signal quality S minimum value that signal quality S value is more than or equal to Serving cell;

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 that all signal strength signal intensity S values are more than or equal to the signal strength signal intensity S minimum value of Serving cell and sort according to signal strength signal intensity R value or signal quality R value in the community of the signal quality S minimum value that signal quality S value is more than or equal to Serving cell, choose the maximum community of signal strength signal intensity R value after sequence or signal quality R value as optimum community.

Gravity treatment unit 405, is further used for being more than or equal to signal strength signal intensity S gravity treatment value when the signal strength signal intensity S value of optimum community, and, when the signal quality S value of optimum community is more than or equal to signal quality S gravity treatment value, start cell reselection.

The specific works process of the terminal that the embodiment of the present invention provides is, selected cell 401 is chosen behind candidate service community, by determining unit 402, determine optimum community, if optimum community is not current Serving cell, start-up check timer 403, and notify judging unit 404 to start to judge whether the signal strength signal intensity of optimum subdistrict and signal quality are more than or equal to gravity treatment thresholding when starting regularly, and in stop timing, notify judging unit to stop judging whether the signal strength signal intensity of optimum subdistrict and signal quality are more than or equal to gravity treatment thresholding, be preset review time T the running time that checks timer, if in checking the running time T of timer 403, the result that judging unit 404 continues judgement is that signal strength signal intensity and the signal quality of optimum community is more than or equal to gravity treatment thresholding all the time, gravity treatment unit 405 starts cell reselection.If signal strength signal intensity and the signal quality of optimum community are not to continue to be more than or equal to gravity treatment thresholding, continue to reside in current Serving cell, this raising gravity treatment thresholding simultaneously adding checks that the device of timer makes that some signal strength signal intensities are fine but signal quality is very poor, or signal quality is fine but candidate's scope that community 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 above-described embodiment is to come the hardware that instruction is relevant to complete by program, this program can be stored in a computer-readable recording medium, and storage medium can comprise: ROM, RAM, disk or CD etc.

Method and the terminal of the avoiding community soldier pang gravity treatment that above the embodiment of the present invention are provided are described in detail, applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.

Claims (6)

1. a method of avoiding cell pingpong reselection, is characterized in that, comprising:
According to S criterion, from current Serving cell and adjacent non-service cell, selecting can be as the community of candidate service community, and described S criterion is the lowest service thresholding that signal strength signal intensity and signal quality are more than or equal to Serving cell;
According to R criterion, determine in described candidate service community optimum community, described R criterion sorts according to signal strength signal intensity or signal quality for all signal strength signal intensities and signal quality being more than or equal to the community of the lowest service thresholding of Serving cell;
If the community of described optimum is not current Serving cell, judge whether the signal strength signal intensity of the community that this is optimum and signal quality are more than or equal to gravity treatment thresholding, and described gravity treatment thresholding is higher than the lowest service thresholding of described Serving cell;
In the situation that the signal strength signal intensity of the community of described optimum and signal quality are more than or equal to gravity treatment thresholding, start cell reselection;
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, the signal strength signal intensity S value of community is more than or equal to the signal strength signal intensity S minimum value of Serving cell, and the signal quality S value of community is more than or equal to Serving cell signal quality S minimum value;
Described R criterion comprises, all signal strength signal intensity S values is more than or equal to the signal strength signal intensity S minimum value of Serving cell and sort according to signal strength signal intensity R value or signal quality R value in the community of the signal quality S minimum value that signal quality S value is more than or equal to 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;
Describedly according to R criterion, determine in described candidate service community that optimum community comprises:
All signal strength signal intensity S values are more than or equal to the signal strength signal intensity S minimum value of Serving cell and sort according to signal strength signal intensity R value or signal quality R value in the community of the signal quality S minimum value that signal quality S value is more than or equal to Serving cell, choose the maximum community of signal strength signal intensity R value after sequence or signal quality R value as optimum community.
2. the method for avoiding cell pingpong reselection according to claim 1, is characterized in that: whether the described signal strength signal intensity that judges the community that this is optimum and signal quality are more than or equal to gravity treatment thresholding comprises:
Start-up check timer, the time of described inspection timer operation is preset review time T;
Whether the signal strength signal intensity and the signal quality that judge the community of described optimum are more than or equal to all the time gravity treatment thresholding within the time of described inspection timer operation;
In the situation that the signal strength signal intensity of optimum community and signal quality are more than or equal to gravity treatment thresholding, the step that starts cell reselection comprises: within the time of described inspection timer operation, if signal strength signal intensity and the signal quality of optimum community are more than or equal to gravity treatment thresholding all the time, start cell reselection.
3. the method for avoiding cell pingpong reselection according to claim 1 and 2, is characterized in that: described in the situation that the signal strength signal intensity of optimum community and signal quality are more than or equal to gravity treatment thresholding and start cell reselection and comprise:
Signal strength signal intensity S value when the community of described optimum is more than or equal to signal strength signal intensity S gravity treatment value, and, when the signal quality S value of the community of described optimum is more than or equal to signal quality S gravity treatment value, start cell reselection.
4. a terminal, is characterized in that, comprising:
Selected cell, for according to S criterion from current Serving cell and select can be as the community of candidate service community in adjacent non-service cell, described S criterion is the lowest service thresholding that signal strength signal intensity and signal quality are more than or equal to Serving cell;
Determining unit, for determine the optimum community, candidate service community of being selected by described selected cell according to R criterion, described R criterion is for to sort the described candidate service community of being selected by selected cell according to signal strength signal intensity or signal quality;
Judging unit, while not being current Serving cell for the optimum community of determining in determining unit, whether the signal strength signal intensity and the signal quality that judge the community that this is optimum are more than or equal to gravity treatment thresholding, and described gravity treatment thresholding is higher than the lowest service thresholding of described Serving cell;
Gravity treatment unit, in the situation that the signal strength signal intensity of the community of the described optimum that judging unit is judged and signal quality are more than or equal to gravity treatment thresholding, starts cell reselection;
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, the signal strength signal intensity S value of community is more than or equal to the signal strength signal intensity S minimum value of Serving cell, and the signal quality S value of community is more than or equal to Serving cell signal quality S minimum value;
Described R criterion comprises, all signal strength signal intensity S values is more than or equal to the signal strength signal intensity S minimum value of Serving cell and sort according to signal strength signal intensity R value or signal quality R value in the community of the signal quality S minimum value that signal quality S value is more than or equal to 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;
Described determining unit, be further used for that all signal strength signal intensity S values are more than or equal to the signal strength signal intensity S minimum value of Serving cell and sort according to signal strength signal intensity R value or signal quality R value in the community of the signal quality S minimum value that signal quality S value is more than or equal to Serving cell, choose the maximum community of signal strength signal intensity R value after sequence or signal quality R value as optimum community.
5. terminal according to claim 4, is characterized in that: also comprises,
Check timer, be used for starting regularly, and notify described judging unit to start to judge whether the signal strength signal intensity of optimum subdistrict and signal quality are more than or equal to gravity treatment thresholding when starting regularly, and in stop timing, notify described judging unit to stop judging whether the signal strength signal intensity of optimum subdistrict and signal quality are more than or equal to gravity treatment thresholding, be preset review time T the running time of described inspection timer;
Described judging unit, is further used for determining behind optimum community in determining unit, judges whether the signal strength signal intensity of optimum community and signal quality are more than or equal to all the time gravity treatment thresholding within the time of described inspection timer operation;
Gravity treatment unit, was further used at described inspection timer in running time, and described judging unit breaks when the signal strength signal intensity of optimum subdistrict and signal quality and being more than or equal to all the time gravity treatment thresholding, starts cell reselection.
6. according to the terminal described in claim 4 or 5, it is characterized in that: described gravity treatment unit, be further used for being more than or equal to signal strength signal intensity S gravity treatment value when the signal strength signal intensity S value of the community of described optimum, and, when the signal quality S value of the community of described optimum is more than or equal to signal quality S gravity treatment value, start cell reselection.
CN201180000270.7A 2011-04-18 2011-04-18 Method and terminal for avoiding cell pingpong reselection CN102204344B (en)

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