CN102572950A - Method, device and system for cell reselection - Google Patents
Method, device and system for cell reselection Download PDFInfo
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- CN102572950A CN102572950A CN2010106139965A CN201010613996A CN102572950A CN 102572950 A CN102572950 A CN 102572950A CN 2010106139965 A CN2010106139965 A CN 2010106139965A CN 201010613996 A CN201010613996 A CN 201010613996A CN 102572950 A CN102572950 A CN 102572950A
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Abstract
The invention discloses a method, a device and a system for cell reselection. The method comprises the steps: residing in a first network and acquiring the load information of a plurality of target cells in a second network, by a terminal; for each target cell, determining the calculation signal level intensity of each target cell according to the load information of each target cell; and comparing the calculation signal level intensity of each target cell with the calculation signal level intensity of a current service cell of the terminal, and determining one target cell meeting a preset condition as the service cell of the terminal, wherein the preset condition refers to that the calculation signal level intensity of each target cell is more than that of the current service cell. According to the invention, in a cell reselection process, the load condition of each network system can be considered, the terminal is reselected to the cell with a lower network load, and thus, the load among networks can be balanced and the service efficiency of network resources can be increased.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of residence reselecting, device and system.
Background technology
Subscriber equipment (Use Equipment abbreviates UE as) need be monitored current area and signal quality of adjacent cells at any time under idle pulley; To select a best sub-district that service is provided; District reselecting that Here it is if selection is the sub-district of another one system, then is called intersystem cell reselection.
At present; During bimodulus (for example TD-SCDMA and GSM) UE start; Can preferentially select to insert TD SDMA (Time Division-Synchronous Code Division Multiple Access; Abbreviate TD-SCDMA as) system's (being 3G network), when the threshold value that can not reach network settings when the 3G network signal quality and the intensity at UE place requires, can carry out 3G network according to the signal quality of sub-district and signal strength signal intensity and arrive global system for mobile communications (Global System for Mobile Communications; Abbreviate GSM as) district reselecting of (being the 2G network); When UE leaves the 2G network coverage area and gets back to the 3G network area of coverage, can carry out the district reselecting of 2G network according to signal quality and the signal strength signal intensity of sub-district, the continuity of the maintenance network coverage to 3G network.
The main trigger condition of intersystem cell reselection is different system adjacent area (1) signal strength signal intensity or (2) signal quality, and the gravity treatment of intersystem cell can not be considered the load condition of each network system, owing to there are differences between the different network systems; Therefore; The signal quality that a system often occurs is better, and the terminal quantity under it is more, and the negligible amounts at terminal under the other system; It is unbalanced system loading to occur; Be unfavorable for the overall use optimization of Internet resources, and the treatment effeciency of the system under the high load capacity can reduce also, be unfavorable for the communication quality at terminal.
Can not consider the load of each network system and cause the problem that system loading is uneven, influence user's proper communication to the gravity treatment of intersystem cell in the correlation technique, not propose effective solution at present as yet.
Summary of the invention
Can not consider the load of each network system and be unfavorable for that network load is balanced, and possibly influence the problem of user's proper communication quality to the gravity treatment of intersystem cell in the correlation technique; The present invention proposes a kind of residence reselecting, device and system; Can promote internetwork load balancing, improve the overall service efficiency of Internet resources.
Technical scheme of the present invention is achieved in that
A kind of residence reselecting, terminal reside in first network, comprising:
Obtain the information on load of a plurality of Target cells of second network;
For each Target cell, confirm the signal calculated level intensity of said Target cell according to the information on load of said Target cell;
The signal calculated level intensity of the current service cell at the signal calculated level intensity of each Target cell and said terminal is compared; A Target cell that satisfies predetermined condition is confirmed as the Serving cell at said terminal; Wherein, said predetermined condition is meant: the signal calculated level intensity of this Target cell is greater than the signal calculated level intensity of said current service cell.
Wherein, utilize following formula to confirm the signal calculated level intensity R of Target cell
n:
R
n=Q
Meas, n-(Q
Offsets, n+ add), and wherein, Q
Meas, nBe the signal level intensity level of the Target cell that records of said terminal, Q
Offsets, nBe the district reselecting bias of Target cell, add is the information on load of Target cell.
Wherein, the Target cell quantity that satisfies said predetermined condition is a plurality of, then will satisfy the processing that a Target cell of predetermined condition confirms as the Serving cell at said terminal and comprise:
With R in a plurality of Target cells that satisfy said predetermined condition
nThe Serving cell at said terminal is confirmed as in maximum sub-district.
Preferably, said pre-conditioned also comprise one of following: Rxlex＞Q
RxlevminRxlex＞Q
RxlevminAnd Rxlex＞Q
RxlevminDuration more than or equal to Treselections;
Wherein, Rxlex is the signal level intensity level of Target cell, Q
RxlevminBe that the preset minimum that is provided with inserts the level intensity threshold value, Treselections is a district reselecting triggered time threshold value.
The processing of information on load of wherein, obtaining a plurality of Target cells of second network comprises:
Said first network obtains the information on load of a plurality of Target cells of said second network through preset interface, and wherein, said preset interface is arranged between said first network and said second network.
Preferably; Said first network is in TDS-CDMA system, broadband CDMA system or the global system for mobile communications, and said second network is another in TDS-CDMA system, broadband CDMA system or the global system for mobile communications.
Wherein, the processing of information on load of obtaining a plurality of Target cells of second network of said first network comprises:
Said first network obtains the information on load of a plurality of Target cells of said second network through preset Iub-g interface, and wherein, said Iub-g interface is arranged between radio network controller and the base station controller.
A kind of district reselecting device, in the current first resident network in terminal, said district reselecting device is arranged in said terminal or said first network, and said district reselecting device comprises:
Acquisition module is used to obtain the information on load of a plurality of Target cells of second network;
Determination module is used for for each Target cell, confirms the signal calculated level intensity of said Target cell according to the information on load of said Target cell;
Comparison module; Be used for the signal calculated level intensity of each Target cell and the signal calculated level intensity of said current service cell are compared; A Target cell that satisfies predetermined condition is confirmed as the Serving cell at said terminal; Wherein, said predetermined condition is meant: the signal calculated level intensity of this Target cell is greater than the signal calculated level intensity of said current service cell.
Wherein, said determination module utilizes following formula to confirm the signal calculated level intensity R of Target cell
n:
R
n=Q
Meas, n-(Q
Offsets, n+ add), and wherein, Q
Meas, nBe the signal level intensity level of the Target cell that records of said terminal, Q
Offsets, nBe the district reselecting bias of Target cell, add is the information on load of Target cell.
Wherein, said comparison module specifically is used under the Target cell quantity that satisfies said predetermined condition is a plurality of situation, with R in a plurality of Target cells that satisfy said predetermined condition
nThe Serving cell at said terminal is confirmed as in maximum sub-district.
Preferably, said pre-conditioned also comprise one of following: Rxlex＞Q
RxlevminRxlex＞Q
RxlevminAnd Rxlex＞Q
RxlevminDuration more than or equal to Treselections;
Wherein, Rxlex is the signal level intensity level of Target cell, Q
RxlevminBe that the preset minimum that is provided with inserts the level intensity threshold value, Treselections is a district reselecting triggered time threshold value.
A kind of district reselecting system comprises first network and second network, and the terminal resides in first network; Wherein, said district reselecting system comprises the district reselecting device, and said district reselecting device is arranged in said terminal or said first network; Said first network comprises the first information on load processing unit; Said second network comprises the second information on load processing unit, wherein
The said second information on load processing unit is used for when the different system of said starting terminal measurements, obtaining the information on load of a plurality of Target cells, and said information on load is sent to the said first information on load processing unit;
The said first information on load processing unit is used to receive the information on load from the said second information on load processing unit, and said information on load is sent to said district reselecting device;
Said district reselecting device is used to obtain the information on load from a plurality of Target cells of the said first information on load processing unit; For each Target cell, confirm the signal calculated level intensity of said Target cell according to the information on load of said Target cell; The signal calculated level intensity of each Target cell and the signal calculated level intensity of said current service cell are compared; A Target cell that satisfies predetermined condition is confirmed as the Serving cell at said terminal; Wherein, said predetermined condition is meant: the signal calculated level intensity of this Target cell is greater than the signal calculated level intensity of said current service cell.
Wherein, the said first information on load processing unit obtains the information on load of a plurality of Target cells of the said second information on load processing unit through preset interface, and wherein, said preset interface is arranged between said first network and said second network.
Preferably; Said first network is in TDS-CDMA system, broadband CDMA system or the global system for mobile communications, and said second network is another in TDS-CDMA system, broadband CDMA system or the global system for mobile communications.
Wherein, said preset interface is arranged between radio network controller and the base station controller.
By means of technique scheme of the present invention, confirm the signal calculated level intensity R of target adjacent section through the load condition that combines network
nMake the reuse adoption process of sub-district can consider the load condition of each network system; The lower sub-district of network load is arrived in the terminal gravity treatment; Solved and be unfavorable in the prior art that network load is balanced, and possibly influence the problem of user's proper communication quality, can promote the load balancing of network, improved the overall service efficiency of Internet resources.
Description of drawings
Fig. 1 is the flow chart according to the residence reselecting of the embodiment of the invention;
Fig. 2 is the exemplary plot according to the preset interface of the embodiment of the invention;
Fig. 3 is the detailed process flow chart according to the residence reselecting of the embodiment of the invention;
Fig. 4 is the structured flowchart according to the district reselecting device of the embodiment of the invention;
Fig. 5 is the structured flowchart according to the district reselecting system of the embodiment of the invention.
Embodiment
In the district reselecting scheme of prior art, all do not combine analysis to load sharing and cell reselection technique, or be exactly only cell reselection technique to be innovated, dwindle time delay; Be exactly in order to realize load sharing, approach is message related to calls control, system message coupling, locking particular terminal, increases functional hardware etc., and the message between RNC and the BSC transmits and can not directly be communicated with, and needs through core net.Do like this and the network element of existing network is changed bigger, and can cause the increase of signaling consumption.
Fig. 1 is the flow chart according to the residence reselecting of the embodiment of the invention, and this moment, the terminal resided in first network, and begins to carry out the intersystem cell measurement, and as shown in Figure 1, this method may further comprise the steps:
Step S101 obtains the information on load of a plurality of Target cells of second network;
Step S103 for each Target cell, confirms the signal calculated level intensity (R of Target cell according to the information on load of Target cell
n);
Step S105 is with the R of each Target cell
nSignal calculated level intensity (R with the current service cell at terminal
s) compare, a Target cell that satisfies predetermined condition is confirmed as the target serving district at terminal, and the terminal is reselected to this Target cell, wherein, predetermined condition can be for one of following: the R of this Target cell
nR greater than current service cell
sThe R of this Target cell
nR greater than current service cell
sAnd satisfy Rxlex＞Q
RxlevminDuration more than or equal to Treselections; The R of this Target cell
nR greater than current service cell
sAnd satisfy Rxlex＞Q
RxlevminWherein, Rxlex is the signal level intensity level of Target cell, Q
RxlevminBe that the preset minimum that is provided with inserts the level intensity threshold value, Treselections is a district reselecting triggered time threshold value.
In said process, can obtain the information on load of a plurality of Target cells of second network by first network; For each Target cell, the information on load of the first network based Target cell is confirmed the signal calculated level intensity (R of Target cell
n); Afterwards, first network is with the R of each Target cell
nSignal calculated level intensity (R with the current service cell at terminal
s) compare, a Target cell that satisfies predetermined condition is confirmed as the target serving district at terminal, and the terminal is reselected to this Target cell, wherein, predetermined condition can be for one of following: the R of this Target cell
nR greater than current service cell
sThe R of this Target cell
nR greater than current service cell
sAnd satisfy Rxlex＞Q
RxlevminDuration more than or equal to Treselections; The R of this Target cell
nR greater than current service cell
sAnd satisfy Rxlex＞Q
RxlevminWherein, Rxlex is the signal level intensity level of Target cell, Q
RxlevminBe that the preset minimum that is provided with inserts the level intensity threshold value, Treselections is a district reselecting triggered time threshold value.
In said process, can obtain the information on load of a plurality of Target cells of second network by first network, and this information on load is sent to the terminal; For each Target cell, the signal calculated level intensity (R of Target cell is confirmed at the terminal according to the information on load of Target cell
n); Afterwards, the terminal is with the R of each Target cell
nSignal calculated level intensity (R with the current service cell at terminal
s) compare, a Target cell that satisfies predetermined condition is confirmed as the target serving district at terminal, and the terminal is reselected to this Target cell, wherein, predetermined condition can be for one of following: the R of this Target cell
nR greater than current service cell
sThe R of this Target cell
nR greater than current service cell
sAnd satisfy Rxlex＞Q
RxlevminDuration more than or equal to Treselections; The R of this Target cell
nR greater than current service cell
sAnd satisfy Rxlex＞Q
RxlevminWherein, Rxlex is the signal level intensity level of Target cell, Q
RxlevminBe that the preset minimum that is provided with inserts the level intensity threshold value, Treselections is a district reselecting triggered time threshold value.
By means of above-mentioned processing, the present invention confirms R through the load condition that combines network
nMake the reuse adoption process of sub-district can consider the load condition of network system; The lower adjacent sub-district of network load is arrived in the terminal gravity treatment; Solved and be unfavorable in the prior art that network load is balanced, and possibly influence the problem of user's proper communication quality, can promote internetwork load balancing, improved the overall service efficiency of Internet resources.
In step S103, can utilize following formula to confirm the R of adjacent sub-district
n:
R
n=Q
Meas, n-(Q
Offsets, n+ add), and wherein, Q
Meas, nBe the adjacent cell signal level intensity value that UE records, Q
Offsets, nBe the district reselecting bias of adjacent sub-district, add is the information on load of adjacent sub-district.
In step S105, be a plurality of if satisfy the adjacent number of cells of predetermined condition, then can be with R in a plurality of adjacent sub-district of satisfying predetermined condition
nThe Serving cell at terminal is confirmed as in maximum sub-district.
Wherein, first network can obtain the information on load of a plurality of adjacent sub-districts of second network through preset interface, and wherein, preset interface is arranged between first network and second network.For example; If first network is one in TDS-CDMA system, broadband CDMA system or the global system for mobile communications; Second network is another in TDS-CDMA system, broadband CDMA system or the global system for mobile communications; At this moment, preset interface can be arranged between radio network controller and the base station controller, and the interface that will be arranged at below between radio network controller and the base station controller is called the Iub-g interface.
Fig. 2 is the exemplary plot that is arranged at the Iub-g interface between radio network controller and the base station controller, and is as shown in Figure 2, and the Iur-g interface is used to connect TD-SCDMA system (or WCDMA system) and gsm system; Particularly; This interface is used to connect RNC and BSC, makes RNC directly link to each other with BSC, has reduced the signaling consumption through core net; Be convenient to RRM, the signaling indication of shortening greatly between TD-SCDMA system and gsm system is mutual.Experiment shows, the successful utilization of Iur-g interface makes that switching and the reselection success rate between GSM and TD-SCDMA system improves greatly.The direct-cut operation success rate can rise to 99.60% from 98.35% between system, and wherein deep fade scene handover success rate rises to 99.78% from 97.74%, and high speed scene handover success rate rises to 99.47% from 98.26%.The big good fortune of time delay for switching between system reduces, and on average shortens 340ms, and time delay shortens more than 34%.
Through increasing the Iur-g interface, the information interaction between RNC and the BSC need not transmitted through core net, makes that the information interaction between RNC and the BSC becomes simple, saves Internet resources, reduces signaling consumption.And come dynamically to adjust cell reselection parameters according to the load message of Iur-g interface, be easy to realize, and specific aim is higher.
The present invention is that example is elaborated with the S criterion and the R criterion of 3G and 2G network reselection technology.
" S criterion " according to district reselecting; When Srxlev＜SsearchRAT satisfies; With the measurement that starts the adjacent sub-district of different system, wherein, Srxlev is P-CCPCH (Primary Common Control Physical Channel) received signal code power (the Received Signal Code Power of TD-SCDMA sub-district; Abbreviating RSCP as) measured value deducts minimum level intensity thresholding and the power back-off of inserting, and SsearchRAT is the threshold value of carrying out system's measurements.Then, system carries out the gravity treatment of sub-district according to " R criterion ".
In " R criterion ", Q
Meas, sBe the Serving cell P-CCPCHRSCP value that UE records, Q
Meas, nBe the adjacent sub-district received signal level value that UE records, Q
OffsetBe the gravity treatment bias of sub-district, Q
HystBe in order to prevent the hysteresis of district reselecting " ping-pong ".Satisfying under the measurement strategies prerequisite, if satisfy condition R
n＞R
s, then triggering cell gravity treatment, otherwise otherwise.Generally speaking, no matter the district reselecting between which two or the several system, as long as satisfy the signal calculated level intensity of the signal calculated level intensity of adjacent sub-district, with constituting the essential condition that UE carries out district reselecting greater than Serving cell.Q
Offsets, nThe gravity treatment priority that is used for each adjacent sub-district of independent control, this value directly influences R
nThe size of value is to Q
Offsets, nThe increase or the minimizing of value, possible moment changes R
nAnd R
sMagnitude relationship, thereby decision gravity treatment strategy play conclusive effect to the load sharing of network.
Below in conjunction with Fig. 3 the present invention is elaborated, supposes the current TD-SCDMA of the residing in network of UE.
Step S301, UE reside in the sub-district under the TD-SCDMA network.
Step S302, if Srxlev＜SsearchRAT, UE open system measurements.
Step S303; The Rs that obtains the Serving cell of UE according to R criterion (PCCPCH RSCP) is (because UE resides in the TD-SCDMA network at this moment; So this Serving cell is the sub-district under the TD-SCDMA network); And the Rn of a plurality of adjacent sub-district of UE (being Target cell mentioned above) (because UE will carry out the district reselecting between system, so adjacent sub-district is the sub-district under the GSM network), wherein:
R
s＝Q
meas，s+Q
hyst，s
R
n＝Q
meas，n-Q
offset，n
Step S304, RNC obtains the information on load from each adjacent sub-district of BSC through the Iur-g interface, and this information on load is sent to the terminal, and the terminal is according to the Q of this information on load to each adjacent sub-district
OffsetValue is made amendment.
Particularly; In this step; BSC has added up the information on load (information on load of the method statistic sub-district that BSC can be through prior art of each sub-district in this BSC; Concrete statistical method repeats no more here), when certain UE moved to certain base station cell (for example the sub-district 1) edge, RNC sent the load request message (Cell Resource SituationRequest) of the adjacent sub-district of GSM of sub-district 1 to BSC through the Iur-g interface; For example the quantity of the adjacent sub-district of the GSM of sub-district 1 is 6, then the information on load of these 6 sub-districts of RNC acquisition request (these 6 sub-districts are adjacent sub-district mentioned above); BSC returns the information on load of these 6 sub-districts through the Iur-g interface to RNC; After RNC receives the information on load of these 6 sub-districts, can calculate queuing, draw the load level of each sub-district in these 6 sub-districts according to the load condition of these 6 sub-districts; The load value of sub-district is big more, and then the load level of this sub-district is high more, with the information on load of 6 adjacent sub-districts according to ascending order; Confirm the load level of these 6 adjacent sub-districts: L1, L2, L3; L4, L5, L6.
RNC calculates through load level, can be to the adjacent sub-district bias Q in the cell reselection parameters
Offsets, nOn-the-fly modify.Particularly, RNC is according to the cell load information that obtains, generated table of grading after, to cell reselection parameters value Q
OffsetMake amendment, for example, can be at the Q of former protocols having regulation
OffsetOn the numerical value basis, add the added value (add) that the sub-district grade is corresponding, following table 1 is the corresponding lists of sub-district grade and added value:
Table 1
| Grade | ?L1 | L2 | L3 | L4 | L5 | L6 |
| Added value (add) | ?1dB | 2dB | 3dB | 5dB | 7dB | 9dB |
Can find out that from table 1 at L1, L2 is in the load level of L3; Because the load variations amplitude is less, so load level of every increase, the corresponding increase of the value of add 1dB is from L4; L5 in the L6 load level, bears under the serious situation at the load of sub-district more, answers appropriate change Q
OffsetThe modification strategy of value, grade of promptly every increase, the corresponding increase of add 2dB.Owing to increased Q relatively
Offsets, nValue, caused R
nValue change has taken place.
Like this, current service cell R
sThe size of value does not change, but target adjacent section R
nVariation has taken place in the size of value:
R
s＝Q
meas，s+Qhysts
R
n＝Q
meas，n-(Q
offsets，n+add)
Through Q in former protocols having regulation
OffsetOn the numerical value basis, add the added value add that the sub-district grade is corresponding, can the purpose of load sharing between network be realized in the adjacent sub-district of the preferential gravity treatment in terminal to underload.
In this step, can not generate table of grading according to cell load information yet, confirm that the added value (add) of sub-district grade correspondence is seen, also can directly obtain R according to information on load
n, that is to say that add can represent added value, also can represent information on load.Obtaining added value according to information on load only is preferred implementation of the present invention.
Step S305, whether the adjacent sub-district of terminal judges satisfies R
n＞R
sAnd Rxlex＞Q
RxlevminDuration more than or equal to Treselections, wherein, Rxlex is the signal level intensity level of adjacent sub-district, Q
RxlevminBe that the preset minimum that is provided with inserts the level intensity threshold value, Treselections is a district reselecting triggered time threshold value, if satisfy this condition, and execution in step S306 then, otherwise execution in step S307.
Step S306; First network reselects to UE the adjacent sub-district of satisfying above-mentioned condition; For example, if having 3 sub-districts (sub-district 2, sub-district 3 and sub-district 4) to satisfy above-mentioned condition in 6 adjacent sub-districts, then can UE be reselected to any sub-district in sub-district 2, sub-district 3, the sub-district 4; Preferably, can UE be reselected to R in sub-district 2, sub-district 3, the sub-district 4
nBe worth maximum sub-district, suppose the R of sub-district 3 in sub-district 2, sub-district 3, the sub-district 4
nValue is maximum, then can UE be reselected to sub-district 3.At this moment, UE inserts the GSM network.
Step S307, UE resides in current service cell, and at this moment, UE still inserts the TD-SCDMA network.
Need to prove; In the present invention; Be the explanation that example is carried out the district reselecting criterion from the TD-SCDMA network reselection to the GSM network only, but be not limited to this, for UE gravity treatment between any two networks in such as GSM, TD-SCDMA, WCDMA networks such as (broadband CDMA systems) with UE; All can be applicable to method provided by the present invention, and within protection scope of the present invention.For example: the reselection of UE from the WCDMA network reselection to the GSM network also followed R criterion and computing formula thereof, and difference wherein is R
sQ in the computing formula
Meas, sIt is WCDMA sub-district CPICH (CPICH Common Pilot Channel) the RSCP value that UE records; The reselection of UE from the GSM network reselection to the TD-SCDMA network is TD-SCDMA PCCPCH RSCP-TD-SCDMA_offsets, n＞GSM RLA_C, and promptly the signal calculated level intensity of TD-SCDMA sub-district is greater than the received signal level intensity of GSM sub-district; The reselection of UE from the GSM network reselection to the WCDMA network is WCDMA CPICH RSCP-WCDMA_Qoffset＞GSM RLA_C, and promptly the signal calculated level intensity of WCDMA sub-district is greater than the received signal level intensity of GSM sub-district.
In embodiments of the present invention, obtain load message, judge that which cell load is vacant through the Iur-g interface; Which cell load is full; And need not carry out issuing and resolving of extensive cell broadcast information, and can reduce a large amount of base station signaling consumptions, save the information interaction time of RNC and BSC; Significantly improve response speed, equally the effect of casting a brick to attract jade is also played in the power conservation techniques research at terminal; And RNC is to adjacent district reselecting bias Q
Offsets, nMake amendment.RNC is under the situation of obtaining each adjacent cell load information of GSM, and bias is on-the-fly modified, and requirement that can the As soon as possible Promising Policy load sharing reduces the unbalanced situation of internetwork load sharing.In addition, among the present invention, RNC obtains the information on load of each sub-district of GSM through the Iur-g interface, and the cell load information of receiving is carried out the grade queuing, dynamically adjusts the cell reselection parameters of RNC, promptly adjacent sub-district bias Q
Offsets, n, amending method is on the numerical value of former agreement regulation, adds added value add, thereby makes the adjacent sub-district of the preferential gravity treatment in terminal to underload.
Fig. 4 is the structured flowchart according to the district reselecting device of the embodiment of the invention, and in the current first resident network in terminal, this district reselecting device can be arranged in the terminal or first network, and as shown in Figure 4, this device can comprise:
Specifically, determination module 2 can utilize following formula to confirm the R of Target cell
n:
R
n=Q
Meas, n-(Q
Offsets, n+ add), and wherein, Q
Meas, nBe the signal level intensity level that records of Target cell, Q
Offsets, nBe the district reselecting bias of Target cell, add is the information on load of Target cell.
Wherein, comparison module 3 specifically can be used under the Target cell quantity that satisfies predetermined condition is a plurality of situation, with R in a plurality of Target cells that satisfy predetermined condition
nThe Serving cell at terminal is confirmed as in maximum sub-district.
Fig. 5 is the structured flowchart according to the district reselecting system of the embodiment of the invention, and is as shown in Figure 5, first network and second network; The terminal resides in first network, and this district reselecting system comprises district reselecting device (being district reselecting device shown in Figure 4), and the district reselecting device is arranged on (it is example that the present invention is arranged in first network with the district reselecting device) in the terminal or first network; First network comprises the first information on load processing unit; Second network comprises the second information on load processing unit, wherein
The second information on load processing unit is used for when the different system of starting terminal measurements, obtaining the information on load of a plurality of Target cells, and information on load is sent to the first information on load processing unit;
The first information on load processing unit is used to receive the information on load from the second information on load processing unit, and information on load is sent to the district reselecting device;
The district reselecting device is used to obtain the information on load from a plurality of Target cells of the first information on load processing unit; For each Target cell, confirm the signal calculated level intensity of Target cell according to the information on load of Target cell; The signal calculated level intensity of each Target cell and the signal calculated level intensity of current service cell are compared; A Target cell that satisfies predetermined condition is confirmed as the Serving cell at terminal; Wherein, predetermined condition is meant: the signal calculated level intensity of this Target cell is greater than the signal calculated level intensity of current service cell.
Wherein, the first information on load processing unit obtains the information on load of a plurality of Target cells of the second information on load processing unit through preset interface, and wherein, preset interface is arranged between first network and second network.
Preferably; If first network is one in TDS-CDMA system, broadband CDMA system or the global system for mobile communications; Second network is another in TDS-CDMA system, broadband CDMA system or the global system for mobile communications, and then preset interface is arranged on (as shown in Figure 2) between radio network controller and the base station controller.
In concrete the application; Above-mentioned district reselecting system can be when user terminal starts different system measurements; Through above-mentioned district reselecting device with obtain mutual between the information on load processing unit; Obtain the information on load of a plurality of Target cells in another network, thereby be the Target cell of user terminal selecting underload.
Generally speaking; Internetwork load is unbalanced; Be unfavorable for the efficient utilization and the investment return of common carrier Internet resources, and possibly influence user's proper communication quality, therefore be necessary to promote the load balancing of GSM and TD-SCDMA network by technological means.The present invention can reduce GSM and the unbalanced situation of TD-SCDMA network load, can help the load sharing between system with the terminal use toward load different system cell migration on the low side.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. residence reselecting, the terminal resides in first network, it is characterized in that, comprising:
Obtain the information on load of a plurality of Target cells of second network;
For each Target cell, confirm the signal calculated level intensity of said Target cell according to the information on load of said Target cell;
The signal calculated level intensity of the current service cell at the signal calculated level intensity of each Target cell and said terminal is compared; A Target cell that satisfies predetermined condition is confirmed as the Serving cell at said terminal; Wherein, said predetermined condition is meant: the signal calculated level intensity of this Target cell is greater than the signal calculated level intensity of said current service cell.
2. residence reselecting according to claim 1 is characterized in that, utilizes following formula to confirm the signal calculated level intensity R of Target cell
n:
R
n=Q
Meas, n-(Q
Offsets, n+ add), and wherein, Q
Meas, nBe the signal level intensity level of the Target cell that records of said terminal, Q
Offsets, nBe the district reselecting bias of Target cell, add is the information on load of Target cell.
3. residence reselecting according to claim 1 is characterized in that, the Target cell quantity that satisfies said predetermined condition is a plurality of, then will satisfy the processing that a Target cell of predetermined condition confirms as the Serving cell at said terminal and comprise:
With R in a plurality of Target cells that satisfy said predetermined condition
nThe Serving cell at said terminal is confirmed as in maximum sub-district.
4. residence reselecting according to claim 1 is characterized in that, said pre-conditioned also comprise one of following: Rxlex＞Q
RxlevminRxlex＞Q
RxlevminAnd Rxlex＞Q
RxlevminDuration more than or equal to Treselections;
Wherein, Rxlex is the signal level intensity level of Target cell, Q
RxlevminBe that the preset minimum that is provided with inserts the level intensity threshold value, Treselections is a district reselecting triggered time threshold value.
5. according to each described residence reselecting in the claim 1 to 4, it is characterized in that the processing of information on load of obtaining a plurality of Target cells of second network comprises:
Obtain the information on load of a plurality of Target cells of said second network through preset interface, wherein, said preset interface is arranged between said first network and said second network.
6. according to each described residence reselecting in the claim 1 to 4; It is characterized in that; Said first network is in TDS-CDMA system, broadband CDMA system or the global system for mobile communications, and said second network is another in TDS-CDMA system, broadband CDMA system or the global system for mobile communications.
7. residence reselecting according to claim 6 is characterized in that, the processing of information on load of obtaining a plurality of Target cells of second network comprises:
Obtain the information on load of a plurality of Target cells of said second network through preset Iub-g interface, wherein, said Iub-g interface is arranged between radio network controller and the base station controller.
8. district reselecting device, the terminal is current to be resided in first network, and said district reselecting device is arranged in said terminal or said first network, it is characterized in that, and said district reselecting device comprises:
Acquisition module is used to obtain the information on load of a plurality of Target cells of second network;
Determination module is used for for each Target cell, confirms the signal calculated level intensity of said Target cell according to the information on load of said Target cell;
Comparison module; Be used for the signal calculated level intensity of each Target cell and the signal calculated level intensity of said current service cell are compared; A Target cell that satisfies predetermined condition is confirmed as the Serving cell at said terminal; Wherein, said predetermined condition is meant: the signal calculated level intensity of this Target cell is greater than the signal calculated level intensity of said current service cell.
9. district reselecting device according to claim 8 is characterized in that, said determination module utilizes following formula to confirm the signal calculated level intensity R of Target cell
n:
R
n=Q
Meas, n-(Q
Offsets, n+ add), and wherein, Q
Meas, nBe the signal level intensity level of the Target cell that records of said terminal, Q
Offsets, nBe the district reselecting bias of Target cell, add is the information on load of Target cell.
10. district reselecting device according to claim 8 is characterized in that,
Said comparison module specifically is used under the Target cell quantity that satisfies said predetermined condition is a plurality of situation, with R in a plurality of Target cells that satisfy said predetermined condition
nThe Serving cell at said terminal is confirmed as in maximum sub-district.
11. each described district reselecting device in 10 is characterized in that according to Claim 8, said pre-conditioned also comprise one of following: Rxlex＞Q
RxlevminRxlex＞Q
RxlevminAnd Rxlex＞Q
RxlevminDuration more than or equal to Treselections;
Wherein, Rxlex is the signal level intensity level of Target cell, Q
RxlevminBe that the preset minimum that is provided with inserts the level intensity threshold value, Treselections is a district reselecting triggered time threshold value.
12. a district reselecting system comprises first network and second network, the terminal resides in first network; It is characterized in that said district reselecting system comprises the district reselecting device, said district reselecting device is arranged in said terminal or said first network; Said first network comprises the first information on load processing unit; Said second network comprises the second information on load processing unit, wherein
The said second information on load processing unit is used for when the different system of said starting terminal measurements, obtaining the information on load of a plurality of Target cells, and said information on load is sent to the said first information on load processing unit;
The said first information on load processing unit is used to receive the information on load from the said second information on load processing unit, and said information on load is sent to said district reselecting device;
Said district reselecting device is used to obtain the information on load from a plurality of Target cells of the said first information on load processing unit; For each Target cell, confirm the signal calculated level intensity of said Target cell according to the information on load of said Target cell; The signal calculated level intensity of each Target cell and the signal calculated level intensity of said current service cell are compared; A Target cell that satisfies predetermined condition is confirmed as the Serving cell at said terminal; Wherein, said predetermined condition is meant: the signal calculated level intensity of this Target cell is greater than the signal calculated level intensity of said current service cell.
13. district reselecting according to claim 12 system is characterized in that,
The said first information on load processing unit obtains the information on load of a plurality of Target cells of the said second information on load processing unit through preset interface, and wherein, said preset interface is arranged between said first network and said second network.
14. according to claim 12 or 13 described district reselecting systems; It is characterized in that; Said first network is in TDS-CDMA system, broadband CDMA system or the global system for mobile communications, and said second network is another in TDS-CDMA system, broadband CDMA system or the global system for mobile communications.
15. district reselecting according to claim 14 system is characterized in that said preset interface is arranged between radio network controller and the base station controller.
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