CN102857981A

CN102857981A - Method and device for realizing cell reselection

Info

Publication number: CN102857981A
Application number: CN201110179672XA
Authority: CN
Inventors: 晏智
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2011-06-29
Filing date: 2011-06-29
Publication date: 2013-01-02
Anticipated expiration: 2031-06-29
Also published as: WO2013000248A1; CN102857981B

Abstract

The invention provides a method and device for realizing cell reselection. The method comprises the following steps: a first target neighbor set is determined by a first controller according to a measurement report sent by a mobile station, wherein the first target neighbor set is a set of the target neighbors which can be selected in cell reselection of the mobile station; the first controller selects a first target neighbor conforming to the preset selection condition from the first target neighbor set, wherein the preset selection condition is the first selection condition determined according to a comprehensive result calculated value, or the preset condition is the second selection condition determined according to a level value parameter of the target neighbor; and the first controller sends the first target neighbor information to the mobile station so that the mobile station selects the first target neighbor in cell reselection. Through the invention, the success rate in cell reselection of the mobile station is improved, and the load balance of the whole network is realized.

Description

A kind of method and device of realizing cell reselection

Technical field

The present invention relates to communication technical field, specifically can relate to a kind of method and device of realizing cell reselection.

Background technology

Modern Mobile Communications Systems normally is based upon on the beehive net mode, so-called beehive net mode, namely by many regular hexagons residential quarter as base unit, combination covers the full wafer service area, thereby consists of the mobile radio communication of the similar honeycomb of shape.Move the minizone of travelling carriage (MS, Mobile Station) in mobile radio communication, and just cell reselection occurs in unavoidable power and interference owing to incoming level, changes Serving cell, makes the user can enjoy better network quality.

In Packet Service, a concept that is closely connected with cell reselection process is network control mode (Network Control mode), and network control mode has three types, is respectively NC0, NC1 and NC2.Under the NC0 pattern, MS in the Packet Service process not to the network side reporting measurement reports, by MS from the master control cell reselection process; Under the NC1 pattern, MS can be to the network side reporting measurement reports in the Packet Service process, but or by MS from the master control cell reselection process; Under the NC2 pattern, network side can be controlled cell reselection process according to the measurement report that MS reports, and decides which target adjacent area of gravity treatment by network side, and is handed down to MS by cell re-selection command, triggers MS and reselects to this target adjacent area.

In existing NC2 pattern lower network side cell reselection algorithm, may be because of the Radio Resource of target adjacent area radio channel resource for example, and the transfer resource deficiency of the interface bandwidth between base station and the controller for example, cause at target adjacent area access failure, finally cause the cell reselection failure.Even if MS cell reselection success, also may make the resource load of whole wireless network unbalanced, make the large residential quarter of some load even can't access again New Consumers, and some residential quarter may exist load very little, the situation of idle excess resource, thus the service quality of whole wireless network affected.

Summary of the invention

Technical problem to be solved by this invention provides a kind of method and device of realizing cell reselection, thereby improves the success rate of travelling carriage when cell reselection, and makes the overall network load balancing.

For solving the problems of the technologies described above, the invention provides scheme as follows:

The embodiment of the invention provides a kind of method that realizes cell reselection, comprising:

The first controller is determined the set of first object adjacent area according to the measurement report that travelling carriage sends, the set of the target adjacent area that the set of described first object adjacent area can be selected when cell reselection for described travelling carriage;

The first controller is in the set of described first object adjacent area, select one to meet the first object adjacent area of presetting alternative condition, described default alternative condition is the first alternative condition of determining according to the synthesis result calculated value, perhaps described pre-conditioned be the second alternative condition of determining according to the level value parameter of target adjacent area, this time obtain by the gravity treatment priority parameters of cell reselection and level value parameter, Radio Resource active volume parameter, the transfer resource active volume calculation of parameter of target adjacent area by described travelling carriage for described synthesis result calculated value;

The first controller sends described first object neighboring BS information to described travelling carriage, so that described travelling carriage when cell reselection, is selected described first object adjacent area.

Preferably, in the described method, described the first controller selects a first object adjacent area that meets default alternative condition to comprise in the set of described first object adjacent area:

In the set of described first object adjacent area, the first controller can obtain the target adjacent area of corresponding resource information, and selection one meets the target adjacent area of the first alternative condition;

In the set of described first object adjacent area, the first controller can't obtain the target adjacent area of corresponding resource information, and selection one meets the target adjacent area of the second alternative condition.

Preferably, in the described method, described the first controller can obtain the target adjacent area of corresponding resource information in the set of described first object adjacent area, selects a target adjacent area that meets the first alternative condition to comprise:

During the first controller judges that described first object adjacent area is gathered, whether have the set of the second target adjacent area, the set of described the second target adjacent area is the set that the first controller can obtain the target adjacent area of corresponding resource information;

The first controller is judged in the set of described the second target adjacent area, whether there is the set of the 3rd target adjacent area, the set of described the 3rd target adjacent area is in the set of the second target adjacent area, the value of corresponding parameter meets the set of the target adjacent area of preset parameter value thresholding, and described parameter comprises level value parameter, Radio Resource active volume parameter, the transfer resource active volume parameter of target adjacent area;

The first controller is with in the set of described the 3rd target adjacent area, and the target adjacent area that meets the first alternative condition is defined as the first object adjacent area.

Preferably, in the described method, described the first controller is with in the set of described the 3rd target adjacent area, and the target adjacent area that meets the first alternative condition is defined as the first object adjacent area and comprises:

When described travelling carriage when this time the gravity treatment priority parameters of cell reselection is greater than default gravity treatment priority threshold, during described the first controller will described the 3rd target adjacent area be gathered, the target adjacent area that meets the first alternative condition was defined as the first object adjacent area;

When described travelling carriage this time the gravity treatment priority parameters of cell reselection be not more than default gravity treatment priority threshold, but in the set of described the 3rd target adjacent area, when the residential quarter that meets the first alternative condition is not the current Serving cell of described travelling carriage, described the first controller is with in the set of described the 3rd target adjacent area, and the target adjacent area that meets the first alternative condition is defined as the first object adjacent area.

Preferably, in the described method, the calculating acquisition process of described synthesis result calculated value comprises:

Synthesis result IR=α P+ β RRAC+ γ TRAC+ δ _RW

Wherein, α is weights corresponding to target adjacent area level value P, and β is weights corresponding to target adjacent area Radio Resource active volume RRAC, and γ is weights corresponding to target adjacent area transfer resource active volume TRAC, δ _RWFor described travelling carriage by the profit and loss value of current service cell gravity treatment to the target adjacent area, when calculating the synthesis result calculated value of travelling carriage current service cell, δ _RWValue according to described travelling carriage this time the gravity treatment priority parameters of cell reselection determine and described δ _RWValue increase along with described gravity treatment priority parameters value and reduce; When calculating the synthesis result calculated value of target adjacent area, δ _RWValue be 0.

Preferably, in the described method, gather for empty when described the second target adjacent area, when perhaps described the 3rd target adjacent area set was for sky, described method also comprised:

When described travelling carriage when this time the gravity treatment priority parameters of cell reselection is greater than default gravity treatment priority threshold, the first controller is with in the set of the 4th target adjacent area, meet the second alternative condition and be not that the target adjacent area that the first controller is being punished is defined as described first object adjacent area, the set of described the 4th target adjacent area is the set that the first controller can't obtain the target adjacent area of corresponding resource information.

Preferably, in the described method, also comprise:

The cell reselection failed message that the first controller receiving mobile sends, carry the cause information of the second target neighboring BS information and cell reselection failure in the described cell reselection failed message, described the second target adjacent area is the target adjacent area of described travelling carriage cell reselection failure;

If described the second target adjacent area is the target adjacent area that the first controller can't obtain corresponding resource information, and the cause information of described cell reselection failure is that Radio Resource or the transfer resource of the second target adjacent area do not meet default requirement, then the first controller is punished described the second target adjacent area, in default Penalty time, the Serving cell that does not allow the first controller to control is selected described the second target adjacent area when cell reselection.

Preferably, in the described method, after punishing described the second target adjacent area, the first controller also comprises:

The punishment message that the first controller will include described the second target neighboring BS information is sent to second controller, so that described second controller is punished described the second target adjacent area, in the Penalty time of correspondence, the Serving cell that does not allow described second controller to control is selected described the second target adjacent area when cell reselection, described second controller is connected with described controller by interconnect interface.

Preferably, in the described method, also comprise:

The first controller receives the punishment message that the 3rd controller sends, and comprises the 3rd target neighboring BS information in the described punishment message, and described the 3rd controller is connected with the first controller by interconnect interface;

If described the 3rd target adjacent area is the target adjacent area that the first controller can't obtain corresponding resource information, then the first controller is punished described the 3rd target adjacent area, in the Penalty time of correspondence, the Serving cell that does not allow the first controller to control is selected described the 3rd target adjacent area when cell reselection.

The embodiment of the invention also provides a kind of device of realizing cell reselection, comprising:

Determination module is used for the measurement report according to the travelling carriage transmission, determines the set of first object adjacent area, the set of the target adjacent area that the set of described first object adjacent area can be selected when cell reselection for described travelling carriage;

Select module, be used for gathering in described first object adjacent area, select one to meet the first object adjacent area of presetting alternative condition, described default alternative condition is the first alternative condition of determining according to the synthesis result calculated value, perhaps described pre-conditioned be the second alternative condition of determining according to the level value parameter of target adjacent area, this time obtain by the gravity treatment priority parameters of cell reselection and level value parameter, Radio Resource active volume parameter, the transfer resource active volume calculation of parameter of target adjacent area by described travelling carriage for described synthesis result calculated value;

Sending module is used for sending described first object neighboring BS information to described travelling carriage, so that described travelling carriage when cell reselection, is selected described first object adjacent area.

Preferably, described selection module comprises:

The first judging unit is used for judging the set of described first object adjacent area, whether has the set of the second target adjacent area, and the set of described the second target adjacent area can be obtained the set of the target adjacent area of corresponding resource information for realizing the cell reselection device;

The second judging unit, be used for judging the set of described the second target adjacent area, whether there is the set of the 3rd target adjacent area, the set of described the 3rd target adjacent area is in the set of the second target adjacent area, the value of corresponding parameter meets the set of the target adjacent area of preset parameter value thresholding, and described parameter comprises level value parameter, Radio Resource active volume parameter, the transfer resource active volume parameter of target adjacent area;

The first determining unit is used for the set of described the 3rd target adjacent area, and the target adjacent area that meets the first alternative condition is defined as the first object adjacent area.

Preferably, the computational process of described synthesis result calculated value comprises:

Synthesis result IR=α P+ β RRAC+ γ TRAC+ δ _RW

Preferably, described selection module also comprises:

The second determining unit, being used for gathering when described the second target adjacent area is that the set of empty or described the 3rd target adjacent area is sky, and described travelling carriage is when this time the gravity treatment priority parameters of cell reselection is greater than default gravity treatment priority threshold, in the set of the 4th target adjacent area, meet the second alternative condition and be not that the target adjacent area that the first controller is being punished is defined as described first object adjacent area, the set of described the 4th target adjacent area is the set that the first controller can't obtain the target adjacent area of corresponding resource information.

Preferably, described device also comprises:

Receiver module is used for the cell reselection failed message that receiving mobile sends, and carries the second target neighboring BS information in the described message, and the cause information of cell reselection failure, and described the second target adjacent area is the target adjacent area of described travelling carriage cell reselection failure;

The punishment module, being used for working as described the second target adjacent area is the target adjacent area that described controller can't obtain corresponding resource information, and the cause information of described cell reselection failure is that the Radio Resource of the second target adjacent area or transfer resource be not when meeting default the requirement, described the second target adjacent area is punished, in default Penalty time, do not allow to realize that the Serving cell that the cell reselection device is controlled selects described the second target adjacent area when cell reselection.

Preferably, described sending module also is used for: the punishment message that will include described the second target neighboring BS information is sent to second controller, so that described second controller is punished described the second target adjacent area, in the Penalty time of correspondence, the Serving cell that does not allow second controller to control is selected described the second target adjacent area when cell reselection, described second controller is connected with described realization cell reselection device by interconnect interface.

Preferably, described receiver module also is used for: receive the punishment message that the 3rd controller sends, comprise the 3rd target neighboring BS information in the described punishment message, described the 3rd controller is connected with described realization cell reselection device by interconnect interface;

Described punishment module, if also being used for described the 3rd target adjacent area is the target adjacent area that described realization cell reselection device can't obtain corresponding resource information, then described the 3rd target adjacent area is punished, in the Penalty time of correspondence, the Serving cell that does not allow described realization cell reselection device to control is selected described the 3rd target adjacent area when cell reselection.

Can find out from the above, method and the device of the realization cell reselection that the embodiment of the invention provides, by the measurement report of the first controller according to the travelling carriage transmission, determine the set of first object adjacent area, the set of the target adjacent area that the set of described first object adjacent area can be selected when cell reselection for described travelling carriage; The first controller is in the set of described first object adjacent area, select one to meet the first object adjacent area of presetting alternative condition, described default alternative condition is the first alternative condition of determining according to the synthesis result calculated value, perhaps described pre-conditioned be the second alternative condition of determining according to the level value parameter of target adjacent area, this time obtain by the gravity treatment priority parameters of cell reselection and level value parameter, Radio Resource active volume parameter, the transfer resource active volume calculation of parameter of target adjacent area by described travelling carriage for described synthesis result calculated value; The first controller sends described first object neighboring BS information to described travelling carriage, so that described travelling carriage when cell reselection, is selected described first object adjacent area.Thereby improve the success rate of travelling carriage when cell reselection, and make the overall network load balancing.

Description of drawings

The residence reselecting schematic flow sheet one that Fig. 1 provides for the embodiment of the invention;

The residence reselecting application scenarios schematic diagram one that Fig. 2 provides for the embodiment of the invention;

The residence reselecting application scenarios schematic diagram two that Fig. 3 provides for the embodiment of the invention;

The residence reselecting application scenarios schematic diagram three that Fig. 4 provides for the embodiment of the invention;

The residence reselecting application scenarios schematic diagram four that Fig. 5 provides for the embodiment of the invention;

The residence reselecting schematic flow sheet two that Fig. 6 provides for the embodiment of the invention;

The residence reselecting schematic flow sheet three that Fig. 7 provides for the embodiment of the invention;

The residence reselecting schematic flow sheet four that Fig. 8 provides for the embodiment of the invention;

The cell reselection apparatus structure schematic diagram one that Fig. 9 provides for the embodiment of the invention;

Select modular structure schematic diagram one in the cell reselection device that Figure 10 provides for the embodiment of the invention;

The cell reselection apparatus structure schematic diagram two that Figure 11 provides for the embodiment of the invention.

Embodiment

Inventive embodiments provides a kind of method that realizes cell reselection, and as shown in Figure 1, the method specifically can comprise:

Step 101, controller are determined the set of first object adjacent area according to the measurement report that travelling carriage sends.

The set of the target adjacent area that the set of first object adjacent area can be selected when cell reselection for travelling carriage;

Step 102, controller select one to meet the first object adjacent area of presetting alternative condition in the set of first object adjacent area.

Described default alternative condition can be the first alternative condition of determining according to the synthesis result calculated value, perhaps described pre-conditioned be the second alternative condition of determining according to the level parameters of target adjacent area, described synthesis result calculated value can this time the gravity treatment priority parameters of cell reselection and level value parameter, Radio Resource active volume parameter, the transfer resource active volume calculation of parameter of target adjacent area be obtained by described travelling carriage;

Step 103, controller sends described first object neighboring BS information to described travelling carriage, so that described travelling carriage when cell reselection, is selected described first object adjacent area.

The realization residence reselecting that the embodiment of the invention provides, can be applicable to GSM mobile network field, mainly be in Packet Service, under network control mode 2 (NC2), after network side reaches the condition of certain gravity treatment in judgement, how to select better target adjacent area, improve reselection success rate and make the gradually purpose of equilibrium of whole wireless network load thereby reach.In fact, the realization residence reselecting that the embodiment of the invention provides is not limited to GSM, goes for too 3G mobile network field, and the below mainly is introduced as an example of gsm mobile communication system example.

The method that the embodiment of the invention provides is when specific implementation, the measurement report that can at first be sent according to travelling carriage by controller, determine the target adjacent area that travelling carriage (MS) can be selected when this cell reselection, and carry out statistical management with the form of target adjacent area set.

The related target adjacent area of the embodiment of the invention (can comprise 2,3, the target adjacent area among the 4G), can (be divided into two kinds of dual mode controller and single mode controllers based on controller, below for convenience of description, controller is all made a general reference these two kinds) whether can to get access to resource information corresponding to this target adjacent area be foundation, is divided into following two classes:

1, controller can get access to the target adjacent area of resource information, for convenience of description, and hereinafter to be referred as category-A target adjacent area.

Also there are two seed categories category-A target adjacent area, is respectively:

(1) target adjacent area and MS current service cell are in same controller.

(2) place, target adjacent area controller and MS current service cell place controller use the interface of interconnection (such as Iur-g interface, A interface etc., because the Iur-g interface is the comparatively common synchronous interface of resource information that carries out, for convenience of description, below unified Iur-g interface is described and give an example, but is not limited in the continuous situation of Iur-g interface) get access to resource.

2, the target adjacent area that controller can not Gains resources information for convenience of description, is designated hereinafter simply as category-B target adjacent area.

But the relation of category-B target adjacent area and MS current service cell specifically can show as strides controller does not adopt that the Iur-g interface interconnects between two controllers etc.

The related application scenarios of the embodiment of the invention can be shown in accompanying drawing 2 to 5.Wherein, accompanying drawing 2 is that category-A target adjacent area and MS current service cell are at the application scenarios of same dual mode controller, accompanying drawing 3 is that category-A target adjacent area and MS current service cell are at the application scenarios of same single mode controller, accompanying drawing 4 is place, category-A target adjacent area controller and the application scenarios that MS current service cell place controller uses the interface of interconnection to be connected, and is the application scenarios that does not have interconnect interface between category-B target adjacent area place controller and the MS current service cell place controller such as accompanying drawing 5.

In the embodiment of the invention, also can carry out to MS the process setting one gravity treatment priority Resel of cell reselection _Priority, this gravity treatment priority represents that MS carries out the urgency level of cell reselection, Resel _PrioritySpan can be 1,2 ..., n, Resel _PriorityThe larger expression gravity treatment of value urgency level just higher,, up-downgoing serious interference too small such as MS current service cell level value, then Resel at this moment _PriorityWill be very large, and for example the each side of MS current service cell own does not have any problem, but in order to find better Serving cell, the Resel in this time _PriorityWill be less.

The realization residence reselecting that the embodiment of the invention provides, when specific implementation, but the type of based target adjacent area is selected different implementation procedures.

For category-A target adjacent area, the embodiment of the invention can consider by weighting scheme level quality, Radio Resource active volume and the transfer resource active volume (active volume=total capacity * (100-total load) of target adjacent area, total load=0,1, ..., 100) parameter, selected one the three is optimum or near the target adjacent area of an ideal value (desired value) in theory.

For the selection course of category-A target adjacent area, can select to determine based on the concrete numerical value of synthesis result IR (Integrative Result), and the computational process of IR value can be finished based on following formula:

IR＝αP+βRRAC+γTRAC+δ _RW (1)

In formula 1, α, β and γ are respectively the corresponding weights of level value (P), Radio Resource active volume (RRAC) and the transfer resource active volume (TRAC) of target adjacent area (also can be the MS current service cell).And δ _RWFor MS by the profit and loss value of current service cell gravity treatment to the target adjacent area, δ _RWBe not constant, can be with Resel _PriorityThe increase of value and reducing, when the IR of calculation services residential quarter value, δ _RWValue by MS cell reselection Resel this time _PriorityDetermine; When calculating the IR value of target adjacent area, δ _RWValue be 0.

The formula 1 that provides based on the embodiment of the invention, above-mentioned parameter can be collected on the order of magnitude, thereby can make things convenient for, the accurate and effective comparison of carrying out the IR value, and select an IR value maximum or near the category-A target adjacent area of an ideal value as MS final target adjacent area of selecting when the cell reselection.And do not limit the concrete numerical value of α, β and γ in the embodiment of the invention.

When category-A target adjacent area is selected, can determine at first also whether P, the RRAC of target adjacent area and TRAC all surpass the corresponding threshold value P that sets in advance _Threshold, RRAC _ThresholdAnd TRAC _ThresholdAnd when the above-mentioned parameter of target adjacent area during all above corresponding threshold value, calculate the value of synthesis result IR according to formula 1.Do not meet for each parameter that corresponding threshold value requires, can directly this target adjacent area be ignored.

In the embodiment of the invention, the above-mentioned parameter threshold value can need based on MS the choice criteria of the target adjacent area of gravity treatment, and perhaps other reference values etc. are determined.

When existing corresponding parameter to surpass the category-A target adjacent area of threshold value, select at last the method for category-A target adjacent area can be:

(1) as the MS gravity treatment priority Resel of cell reselection this time _PriorityValue greater than the gravity treatment priority threshold value Resel that sets in advance _ThresholdThe time, the target adjacent area of selecting the IR value to meet default alternative condition (follow-up this alternative condition can be referred to as IR value alternative condition) is MS final re-selecting cell of selecting when cell reselection.

(2) as the MS gravity treatment priority Resel of cell reselection this time _PriorityValue be not more than gravity treatment priority threshold value Resel _ThresholdThe time, and when the residential quarter that the IR value meets default IR value alternative condition is not the MS current service cell, select the IR value to meet the target adjacent area of default IR value alternative condition as the re-selecting cell of final selection; Otherwise, abandon this gravity treatment.

For category-B target adjacent area, MS current service cell place controller is the resource information that can't get access to this type of target adjacent area, so the selection priority of category-B target adjacent area will be lower than category-A target adjacent area.In addition, for reduce gravity treatment to category-B target adjacent area owing to the not enough probability that causes the gravity treatment failure of Radio Resource or transfer resource, the embodiment of the invention can consider when MS from the Serving cell gravity treatment to the adjacent area failure of category-B target and the cell reselection failure cause be that Radio Resource deficiency or transfer resource are when not enough, then this category-B target adjacent area is punished in current controller global scope, this category-B target adjacent area is added the punishment tabulation, and preset a Penalty time T _Punish(at T _PunishIn can think all that this target adjacent area is in the very high state of resource load, the T that the embodiment of the invention is related _PunishBe not equal to the existing time punishment that arranges in order to prevent ping-pong reselection, consider the duration of resources occupation rate, the T that the embodiment of the invention is related _PunishCan be far longer than the duration that arranges in order to prevent ping-pong reselection), at this T _PunishIn, controller does not allow Serving cell that controller controls when carrying out the MS cell reselection, selects this target adjacent area.

Simultaneously, the related controller of the embodiment of the invention also can be by target adjacent area punishment message (the inside story form that dual mode controller can adopt ASN.1 to encode, the controller that Iur-g links to each other then can carry out the message transmission by SCCP, the target neighboring BS information that can comprise the gravity treatment failure in the punishment message), notice is punished this target adjacent area by other controller that interconnect interface is connected simultaneously with controller, when category-B target adjacent area that target adjacent area that other controller is judged this gravity treatment failure comprises for this controller, then can give the T that other controller sets to this target adjacent area equally _PunishThe punishment of duration.Carry out cell reselection to this target adjacent area again with regard to the residential quarter of having avoided these controllers like this and cause the gravity treatment failure.

And, the related controller of the embodiment of the invention can also receive the punishment message that other controllers send, and when specified target adjacent area is similarly the category-B residential quarter of controller in the punishment message, this target adjacent area is punished, in the Penalty time of setting, the Serving cell that does not allow controller to control is selected this target adjacent area when cell reselection.

Because controller is unknown for the resource information of category-B target adjacent area, considers the uncertainty after this type of target adjacent area is arrived in gravity treatment, can work as do not exist category-A target adjacent area or corresponding parameter not to have can be above the category-A target adjacent area of thresholding, and gravity treatment priority Resel _PriorityValue greater than gravity treatment priority threshold value Resel _ThresholdThe time, just can select category-B target adjacent area.Satisfying under the above-mentioned precondition, can select one to meet the alternative condition determined based on category-B target adjacent area level value (level value is maximum or near an ideal value, follow-up this alternative condition can be referred to as P value alternative condition), and be not controller punish (namely not in Penalty time) the target adjacent area as final re-selecting cell.In addition, in the embodiment of the invention, also can only surpass P in the P value _ThresholdCategory-B target adjacent area in, select one to meet the residential quarter of P value alternative condition as final re-selecting cell.

Below in conjunction with accompanying drawing, the specific implementation flow process of the realization residence reselecting that the embodiment of the invention is provided is carried out detailed statement.

As shown in Figure 6, described method specifically can comprise following treatment step when realizing cell re-selection procedure:

Step 601: determine candidate target adjacent area set C1.

In this step, need to carry out the measurement report that controller corresponding to the MS current service cell of cell reselection can report based on MS, determine the target adjacent area set C1 that MS can select when this cell reselection, simultaneously, controller also can be determined this gravity treatment priority Resel _Priority

Step 602: carry out cell classification.

Whether the controller basis can obtain corresponding resource information is target adjacent area type, and C1 is divided into respectively category-A candidate target adjacent area set C2 and category-B candidate target adjacent area set C3.

Step 603: judge whether C2 is empty.

Controller judges whether C2 is empty set, if not then continuation, otherwise turns step 610.

Step 604: determine that parameter surpasses the target adjacent area set C4 of corresponding threshold value.

Controller can travel through the target adjacent area among the C2, checks respectively whether P value, RRAC value and the TRAC value of these target adjacent areas all surpasses corresponding threshold value P _Threshold, RRAC _ThresholdAnd TRAC _ThresholdIf above-mentioned parameter all surpasses corresponding threshold value, then controller is attributed to category-A candidate target adjacent area collection and C4 with the target adjacent area of correspondence.

Step 605: judge whether C4 is empty set, if not then continuation, otherwise turn step 610.

Step 606: the IR value of calculating target consular district among the C4.

Specifically can calculate the IR value of target adjacent area among the C4 based on formula 1.

In this step, also can comprise the operation of calculating MS current service cell IR value.

Step 607: judge gravity treatment priority Resel _PriorityWhether greater than gravity treatment priority threshold value Resel _ThresholdIf be not more than then continue, otherwise turn step 609.

Step 608: judge whether the residential quarter that the IR value meets IR value alternative condition is the MS current service cell, if not, then continue, otherwise turn step 613.

Step 609: selected IR value meets the target adjacent area of IR value alternative condition for the final re-selecting cell of selecting, and turns step 612.

Step 610: judge whether C3 is empty set, if not then continuation, otherwise turn step 613.

Step 611: work as Resel _PriorityGreater than Resel _ThresholdThe time, in C3, select and meet P value alternative condition and be not that the target adjacent area punished of controller is as the final re-selecting cell of selecting.

Step 612: send the cell re-selection command of carrying the selected target neighboring BS information to MS.

Step 613: finish to select re-aiming adjacent area handling process.

As shown in Figure 7, the handling process of described method after the failure of MS cell reselection specifically can may further comprise the steps:

Step 701: receive the cell reselection failed message that MS sends

Carry the target neighboring BS information of this cell reselection failure and failed cause information (Cause) in the cell reselection failed message.

Step 702: determine the cell reselection failure cause.

By checking the cause information that carries in the cell reselection failed message, judge whether the reason of cell reselection failure is that target adjacent area Radio Resource deficiency or transfer resource are not enough, if it is continue, otherwise turn step 709.

Step 703: whether the target adjacent area of judging the cell reselection failure is category-B target adjacent area, if it is continues, otherwise turns step 709.

Step 704: the target adjacent area to the cell reselection failure imposes T _PunishPunishment in time period is at T _PunishIn time period, the Serving cell that controller is controlled forbids that again gravity treatment is to this target adjacent area.

Step 705: judge whether current controller is dual mode controller, if continue, otherwise turn step 707.

Step 706: another standard to current dual mode controller sends target adjacent area punishment message, so that another standard of current dual mode controller is punished this target adjacent area equally.

The target neighboring BS information that comprises the cell reselection failure in the punishment message.

Step 707: judge whether to exist other controller that adopts interconnect interface (such as Iur-g) to be connected with current controller, if exist then continuation, otherwise turn step 709.

Step 708: other controller that adopts interconnect interface to be connected to all and current controller sends target adjacent area punishment message, and this target adjacent area is punished.

Step 709: cell reselection failure handling flow process finishes.

As shown in Figure 8, when controller was received the target adjacent area punishment message of other controller transmission of adopting the interconnect interface connection, the concrete handling process of described method can may further comprise the steps order:

Step 801: receiving target adjacent area punishment message.

In this target adjacent area punishment message, carry the target neighboring BS information that need to carry out forbidding owing to inadequate resource gravity treatment punishment.

Step 802: judge that whether this target adjacent area is a category-B target adjacent area in this controller, if it is continues, otherwise turns step 804.

Step 803: the T that this target adjacent area is imposed setting _PunishPunishment in time period is at T _PunishIn time period, do not allow the again target adjacent area that catches hell to this of gravity treatment of Serving cell that this controller controls.

Step 804: target adjacent area punishment Message Processing flow process finishes.

Can find out by foregoing description, the realization residence reselecting that the embodiment of the invention provides, classify by the target adjacent area that can select when the cell reselection travelling carriage, and for dissimilar target adjacent area, adopt different target adjacent area reselecting methods that the target adjacent area is selected, thereby in the susceptibility that guarantees the user, significantly improved the success rate of travelling carriage cell reselection, and, target adjacent area reselecting method has taken into full account the combination property of the parameters of target adjacent area, thereby can make whole wireless network load balancing.

The embodiment of the invention also provides a kind of device of realizing cell reselection, and this device specifically can be a controller, and as shown in Figure 9, this device specifically can comprise:

Determination module 910 is used for the measurement report according to the travelling carriage transmission, determines first object adjacent area set C1.

Set C1 in described first object adjacent area is the set of the target adjacent area that can select when cell reselection of described travelling carriage.

Select module 920, be used for selecting one to meet the first object adjacent area of presetting alternative condition in the set of described first object adjacent area.

Described default alternative condition is first alternative condition (follow-up be referred to as IR value alternative condition) definite according to synthesis result calculated value (IR), perhaps described pre-conditioned the second alternative condition (the follow-up P value alternative condition that is referred to as) for determining according to level value (P) parameter of target adjacent area, described synthesis result calculated value is for obtaining according to the gravity treatment priority parameters of this cell reselection of described travelling carriage and level value parameter, Radio Resource active volume parameter, the transfer resource active volume calculation of parameter of target adjacent area.

Sending module 930 is used for sending described first object neighboring BS information to described travelling carriage, so that described travelling carriage when cell reselection, is selected described first object adjacent area.

The realization of the realization cell reselection device that the embodiment of the invention provides can improve the success rate of travelling carriage when cell reselection, and makes the overall network load balancing.

The target adjacent area that the embodiment of the invention is related, can whether can get access to resource information corresponding to this target adjacent area based on described device is foundation, is divided into following two classes:

In the embodiment of the invention, also can carry out to MS the process setting one gravity treatment priority Resel of cell reselection _Priority, this gravity treatment priority represents that MS carries out the urgency level of cell reselection, Resel _PrioritySpan can be 1,2 ..., n, Resel _PriorityThe larger expression gravity treatment of value urgency level just higher.

The realization cell reselection device that the embodiment of the invention provides, when specific implementation, but the type of based target adjacent area is selected different implementation procedures.

For category-A target adjacent area, the embodiment of the invention can consider by weighting scheme the level quality of target adjacent area, Radio Resource active volume and transfer resource active volume (active volume=total capacity * (100-total load), total load=0,1, ..., 100) parameter, selected one the three is optimum or near the target adjacent area of an ideal value (desired value) in theory.

IR＝αP+βRRAC+γTRAC+δ _RW

In this formula, α, β and γ are respectively the corresponding weights of level value (P), Radio Resource active volume (RRAC) and the transfer resource active volume (TRAC) of target adjacent area (also can be the MS current service cell).And δ _RWFor MS by the profit and loss value of current service cell gravity treatment to the target adjacent area, δ _RWBe not constant, can be with Resel _PriorityThe increase of value and reducing, when the IR of calculation services residential quarter value, δ _RWValue by MS cell reselection Resel this time _PriorityDetermine; When calculating the IR value of target adjacent area, δ _RWValue be 0.

The above-mentioned formula that provides based on the embodiment of the invention, above-mentioned parameter can be collected on the order of magnitude, thereby can make things convenient for, the accurate and effective comparison of carrying out the IR value, and select an IR value maximum or near the category-A target adjacent area of an ideal value as MS final target adjacent area of selecting when the cell reselection.And do not limit the concrete numerical value of α, β and γ in the embodiment of the invention.

When category-A target adjacent area is selected, can determine at first also whether P (level value), the RRAC (Radio Resource active volume) of target adjacent area and TRAC (transfer resource active volume) all surpass the corresponding threshold value P that sets in advance _Threshold, RRAC _ThresholdAnd TRAC _ThresholdAnd when the above-mentioned parameter of target adjacent area during all above corresponding threshold value, calculate the value of synthesis result IR according to above-mentioned formula.Do not meet for each parameter that corresponding threshold value requires, can directly this target adjacent area be ignored.

Based on the foregoing description content, in optional embodiment of the present invention, as shown in Figure 10, select module 920 specifically can comprise:

Judging unit 921 is used for the C1 that judgement determination module 910 is determined, whether has the second target adjacent area set C2, and described C2 can obtain the set of the target adjacent area of corresponding resource information for realizing the cell reselection device.

Judging unit 922, be used for judging C2, whether there is the 3rd target adjacent area set C3, described C3 is among the above-mentioned C2, the value of corresponding parameter meets the set of the target adjacent area of preset parameter value thresholding, and described parameter comprises level value parameter, Radio Resource active volume parameter, the transfer resource active volume parameter of target adjacent area.

Determining unit 923 is used for C3, the final target adjacent area of selection when the target adjacent area that IR value meets IR value alternative condition (be IR value maximum or near an ideal value) determines that described first object adjacent area is cell reselection.

The determining unit 923 last methods of category-A target adjacent area of selecting also can be:

(1) as the MS gravity treatment priority Resel of cell reselection this time _PriorityValue greater than the gravity treatment priority threshold value Resel that sets in advance _ThresholdThe time, the target adjacent area of selecting the IR value to meet default IR value alternative condition is MS final re-selecting cell of selecting when cell reselection.

(2) as the MS gravity treatment priority Resel of cell reselection this time _PriorityValue be not more than gravity treatment priority threshold value Resel _ThresholdThe time, and when the residential quarter that the IR value meets default IR value alternative condition is not the MS current service cell, select the IR value to meet the target adjacent area of default alternative condition as the re-selecting cell of final selection; Otherwise, abandon this gravity treatment.

The realization cell reselection device that the embodiment of the invention provides is when selecting for category-B target adjacent area, because MS current service cell place controller is the resource information that can't get access to category-B target adjacent area, so the selection priority of category-B target adjacent area will be lower than category-A target adjacent area.Consider the uncertainty after category-B target adjacent area is arrived in gravity treatment, can work as and do not exist category-A target adjacent area or corresponding parameter not to have to surpass the category-A target adjacent area of thresholding and gravity treatment priority Resel _PriorityValue greater than gravity treatment priority threshold value Resel _ThresholdThe time, just can select category-B target adjacent area.Satisfying under the above-mentioned precondition, can select level value to meet P value alternative condition (be P value maximum or near an ideal value), and not be that the target adjacent area of (namely not in the Penalty time) of realizing that the cell reselection device is being punished is as final re-selecting cell.

Based on foregoing description, in optional embodiment of the present invention, as shown in Figure 10, described selection module 920 also comprises:

Determining unit 924, it is empty being used for working as C2 or described C3 is sky, and described travelling carriage is when this time the gravity treatment priority parameters of cell reselection is greater than default gravity treatment priority threshold, in the 4th target adjacent area set C4, level value meets P value alternative condition and is not the final target adjacent area of selecting when realizing that target adjacent area that the cell reselection device is being punished is defined as cell reselection, and the set of described the 4th target adjacent area can't be obtained the set of the target adjacent area of corresponding resource information for described realization cell reselection device.

In addition, for reduce gravity treatment to category-B target adjacent area owing to the not enough probability that causes the gravity treatment failure of Radio Resource or transfer resource, the embodiment of the invention can consider when MS from the Serving cell gravity treatment to the adjacent area failure of category-B target and the cell reselection failure cause be that Radio Resource deficiency or transfer resource are when not enough, then this category-B target adjacent area is punished in current controller global scope, this category-B target adjacent area is added the punishment tabulation, and preset a Penalty time T _Punish(at T _PunishIn can think all that this target adjacent area is in the very high state of resource load, the T that the embodiment of the invention is related _PunishBe not equal to the existing time punishment that arranges in order to prevent ping-pong reselection, consider the duration of resources occupation rate, the T that the embodiment of the invention is related _PunishCan be far longer than the duration that arranges in order to prevent ping-pong reselection), at this T _PunishIn, realize that Serving cell that cell reselection device (controller) do not allow to realize that the cell reselection device controls when carrying out the MS cell reselection, selects this target adjacent area.

Based on the foregoing description content, in optional embodiment of the present invention, described device can also comprise:

Receiver module 940, be used for the cell reselection failed message that receiving mobile sends, carry the second target neighboring BS information in the described message, and the cause information of cell reselection failure, described the second target adjacent area is the target adjacent area of described travelling carriage cell reselection failure;

Punishment module 950, being used for working as described the second target adjacent area is the target adjacent area that described controller can't obtain corresponding resource information, and the cause information of described cell reselection failure is that Radio Resource or the transfer resource of the second target adjacent area do not meet default requirement, described the second target adjacent area is punished, at a default Penalty time T _PunishIn do not allow to realize that the Serving cell that the cell reselection device is controlled selects the second target adjacent area when cell reselection.

Simultaneously, the realization cell reselection device that the embodiment of the invention provides, also can be by target adjacent area punishment message, notice is punished this target adjacent area by other controller that interconnect interface (for example Iur-g interface) is connected simultaneously with described device, other controller is judged the category-B target adjacent area that the target adjacent area of this gravity treatment failure comprises for other controllers, then can give a T who sets to this target adjacent area equally _PunishThe punishment of duration.Carry out cell reselection to this target adjacent area again with regard to the residential quarter of having avoided other controllers like this and cause the gravity treatment failure.

Based on the foregoing description content, in optional embodiment of the present invention, sending module 930 can also be used for: the target adjacent area punishment message that will include the second target neighboring BS information is sent to second controller, so that described second controller is punished described the second target adjacent area, in the Penalty time of setting, the Serving cell that does not allow second controller to control is selected described the second target adjacent area when cell reselection, described second controller is connected with described realization cell reselection device by interconnect interface.

And, the realization cell reselection device that the embodiment of the invention provides, can also receive the punishment message that other controllers send, and when specified target adjacent area is similarly the category-B target adjacent area of described device in the punishment message, this target adjacent area is punished, in setting Penalty time, the Serving cell that does not allow described device to control is selected this target adjacent area when cell reselection.

Based on the foregoing description content, in optional embodiment of the present invention, receiver module 940 can also be used for: receive the punishment message that the 3rd controller sends, comprise the 3rd target neighboring BS information in the described punishment message, described the 3rd controller is connected with described realization cell reselection device by interconnect interface.

Punishment module 950, if can also be used for described the 3rd target adjacent area is the target adjacent area that described realization cell reselection device can't obtain corresponding resource information, then described the 3rd target adjacent area is punished, in the Penalty time of setting, the Serving cell that does not allow described realization cell reselection device to control is selected described the 3rd target adjacent area when cell reselection.

A complete structure schematic diagram of the realization cell reselection device that the embodiment of the invention provides can be as shown in Figure 11.

Can find out by foregoing description, the realization cell reselection device that the embodiment of the invention provides, classify by the target adjacent area that can select when the cell reselection travelling carriage, and for dissimilar target adjacent area, adopt different target adjacent area reselecting methods that the target adjacent area is selected, thereby in the susceptibility that guarantees the user, significantly improved the success rate of travelling carriage cell reselection, and, target adjacent area reselecting method has taken into full account the combination property of the parameters of target adjacent area, thereby can make whole wireless network load balancing.

The above only is embodiments of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims

1. a method that realizes cell reselection is characterized in that, comprising:

2. method according to claim 1 is characterized in that, described the first controller selects a first object adjacent area that meets default alternative condition to comprise in the set of described first object adjacent area:

3. method according to claim 2 is characterized in that, described the first controller can obtain the target adjacent area of corresponding resource information in the set of described first object adjacent area, selects a target adjacent area that meets the first alternative condition to comprise:

4. method according to claim 3 is characterized in that, described the first controller is with in the set of described the 3rd target adjacent area, and the target adjacent area that meets the first alternative condition is defined as the first object adjacent area and comprises:

5. according to claim 1 to 4 each described methods, it is characterized in that, the calculating acquisition process of described synthesis result calculated value comprises:

Synthesis result IR=α P+ β RRAC+ γ TRAC+ δ _RW

6. method according to claim 3 is characterized in that, gathers for empty when described the second target adjacent area, and when perhaps described the 3rd target adjacent area set was for sky, described method also comprised:

7. according to claim 1 or 6 described methods, it is characterized in that, also comprise:

8. method according to claim 7 is characterized in that, described method also comprises after the first controller is punished described the second target adjacent area:

9. according to claim 2 or 8 described methods, it is characterized in that, also comprise:

10. a device of realizing cell reselection is characterized in that, comprising:

11. device according to claim 10 is characterized in that, described selection module comprises:

12. device according to claim 11 is characterized in that, the computational process of described synthesis result calculated value comprises:

Synthesis result IR=α P+ β RRAC+ γ TRAC+ δ _RW

13. device according to claim 11 is characterized in that, described selection module also comprises:

14. according to claim 10 or 13 described devices, it is characterized in that, also comprise:

15. device according to claim 14, it is characterized in that, described sending module also is used for: the punishment message that will include described the second target neighboring BS information is sent to second controller, so that described second controller is punished described the second target adjacent area, in the Penalty time of correspondence, the Serving cell that does not allow second controller to control is selected described the second target adjacent area when cell reselection, described second controller is connected with described realization cell reselection device by interconnect interface.

16. device according to claim 14, it is characterized in that, described receiver module also is used for: receive the punishment message that the 3rd controller sends, comprise the 3rd target neighboring BS information in the described punishment message, described the 3rd controller is connected with described realization cell reselection device by interconnect interface;