CN1671243A - A method of hard switch between heterogeneous systems for WCDMA system - Google Patents
A method of hard switch between heterogeneous systems for WCDMA system Download PDFInfo
- Publication number
- CN1671243A CN1671243A CNA2005100690629A CN200510069062A CN1671243A CN 1671243 A CN1671243 A CN 1671243A CN A2005100690629 A CNA2005100690629 A CN A2005100690629A CN 200510069062 A CN200510069062 A CN 200510069062A CN 1671243 A CN1671243 A CN 1671243A
- Authority
- CN
- China
- Prior art keywords
- different system
- state
- rnc
- measurement
- sub
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- Y02B60/50—
Abstract
A different system hard switching method for WXDMA system, which is adaptive to initial stage application of third generation mobile communication system network establishment, improves signal quality of user communication in optimum mode, reduces UE transmission power and interference to other cells, said method also refers process of emergency of wireless network, dispatching among modules in integral system and technological content of planning 3G system network, can be adapted to other CDMA system.
Description
Technical field
The present invention relates to a kind of method that is used for the different system direct-cut operation of Wideband Code Division Multiple Access (WCDMA) (WCDMA) system, this method is specially adapted to the 3-G (Generation Three mobile communication system) network and sets up the initial stage application.The invention still further relates to the technology contents of scheduling between the processing, total system inner module of wireless network emergency, 3G system network planning layout, changing method of the present invention is applicable to other code division multiple access (CDMA) system too.
Background technology
The application of mobile communcations system more and more widely, a lot of key technologies in this system also are gradually improved, but still have some problems to need to solve, switch the sub-district is exactly one of them main problem.In cellular radio Communication system, the overlay area of a radio communication is made up of the overlapping sub-district of mass part.When a mobile subscriber was mobile in this zone, the mobile subscriber of often taking place to be in connection status with the sub-district switched to the situation of another sub-district from a sub-district.In the first and second generation cell mobile communication systemses, for the employed frequency of certain designated cell, other adjacent cells can not re-use, and just the interval on will having living space between the sub-district of using same frequency forms channeling.So, the mobile subscriber mainly carries out on the channel at different frequency in the switching of minizone, needed to discharge the Radio Link that this user has been friends in the past before mobile subscriber's new Radio Link is set up, the switching of this moment can cause the phenomenon of communication disruption, is referred to as direct-cut operation.
Because the WCDMA mobile communication system networking initial stage of the third generation (3G), its network coverage is inevitable limited, simultaneously also for the seamlessly transitting of the second generation (2G) mobile communication system service and the service of the third generation (3G) mobile communication system, the WCDMA system of 3G must support user terminal (UE) to switch between the GSM/GPRS of for example TDMA of the WCDMA of 3G system and existing 2G system nets.WCDMA and GSM standard are supported the mutual switching between WCDMA and the GSM.When providing the UE of service in moving process by the 3G system, increase because the variation of surrounding environment or the number of users of current 3G system cell are anxious, cause this UE communication quality in the 3G grid to worsen, iff can not well satisfying the requirement of UE to communication quality by soft handover in the 3G system, in the area that the 2G network coverage is arranged, must consider to take the different system direct-cut operation between 3G system and the 2G system to obtain better communication quality.Before implementing this kind direct-cut operation, the signal quality of each different districts of the 2G network that need report measurement carries out comprehensive assessment, in time UE is switched to quality system preferably, promptly implements different system direct-cut operation.Because direct-cut operation might cause call drop, therefore in realizing the method that different system is switched, the risk that reduces call drop is the content that needs emphasis to consider.
The WCDMA system of 3G and other 2G systems for example gsm system have compared many special characters with cdma system, because 3G is relatively short at the commercial development time of various countries, at present also there is not to reduce the different system of the prior art method for hard switching of risk of dropped calls, therefore need to propose a kind of can the WCDMA of the 3G system networking initial stage effectively provide and the 2G system between direct-cut operation mutually, can reduce the different system method for hard switching of risk of dropped calls again.
Summary of the invention
The purpose of this invention is to provide a kind of different system method for hard switching that is used for broadband CDMA system, this method reports based on Event triggered.The know-why that explained later the inventive method is adopted.
In 3GPP TS 25.331 technical specifications, can select dual mode when the measurement report of UE reports radio network controller (RNC) in the regulation WCDMA system: periodic report mode and Event triggered report mode.The inventive method mainly adopts Event triggered to report mode to propose.In the methods of the invention, make full use of defined incident in 3GPP TS 25.331 standards, carry out selectively, reasonably be used in combination, avoid frequent unnecessary different system direct-cut operation on the one hand as far as possible, allow UE in different system direct-cut operation, obtain link as much as possible on the other hand as far as possible and support, reduce the risk of call drop.
The method of the invention is used and is comprised two preconditions: the first, and UE place geographic cell has multisystem to cover, and promptly has the WCDMA system of 3G and for example gsm system of 2G simultaneously, cuts firmly otherwise UE can not carry out different system; The second, in measurement control order, use Event triggered to report mode.
According to the regulation of 3GPP TS 25.331 standards, method of the present invention is adopted following incident in this regulation:
(1) incident 3A: the estimated quality that the estimated quality of the UTRAN frequency of current use is lower than a certain thresholding and other system is higher than a certain thresholding;
(2) incident 3B: the estimated quality of other system is lower than a certain thresholding;
(3) incident 3C: the estimated quality of other system is higher than a certain thresholding;
(4) incident 3D: best cell is changed in other system.
According to above-mentioned technical specification, no matter the UE measurement result belongs in above-mentioned four any in the incident, and UE gives reporting events the RNC in the WCDMA system.
When using the inventive method, the WCDMA system is under four kinds of states, and when carrying out each step of the inventive method, carries out state exchange between four kinds of states.The particular content of four kinds of states is as follows:
State a: be called the common frequency measurement state, UE keeps each required cellular downlink carrier frequency of soft handover in the WCDMA system is measured under this state, and report the estimated quality of the common frequency measurement that calculates according to measurement result, report the information of measured sub-district in the WCDMA system simultaneously; Calculate the estimated quality of the intrasystem above-mentioned common frequency measurement of WCDMA according to following formula (1).
In the formula (1), Q
UTRANRepresent the estimated quality of the Active Set under the current UTRAN frequency of utilization;
M
UTRANBeing the estimated quality of the Active Set under the current UTRAN frequency of utilization of representing with other unit, can be the Ec/No or the RSCP of down link;
M
iMeasurement quality for cell i in the Active Set;
N
ABe number of cells in the Active Set;
M
BestBe the measurement result of strong sub-district in the Active Set;
W is a weights coefficient of passing to UE from the RNC of WCDMA;
Measured value is if the signal to noise ratio of downlink carrier frequency (Ec/No), M
UTRAN, M
i, M
BestBe unit then with decibel (dB);
Measured value is if the received signal level of downlink carrier frequency (RSCP), M
UTRAN, M
i, M
BestBe unit then with milliwatt (mW);
State b, be called the isosystem measurement state, RNC sends the isosystem measurement order to UE under this state, by UE the signal of different system peripheral cell is measured, and the reporting measurement result, professor's signal strength signal intensity indication (RSSI) of measuring carrier wave in the gsm system for example usually;
State c: be called different system hard handoff decision state, the relevant information of the different system cell that comprises in the incident that RNC reports UE stores, and waits for subsequent measurement;
State d: switch executing state, RNC carries out different system direct-cut operation, and UE is switched to the 2G system from the WCDMA system of 3G.
A kind of different system method for hard switching that is used for the WCDMA system of the present invention, concrete steps are as follows:
Step 1, RNC initiates isosystem measurement.At state a, if the estimated quality of UE common frequency measurement in the measured WCDMA system of RNC report is lower than a certain predetermined threshold, then initiate isosystem measurement, promptly the radio network controller (RNC) by the WCDMA system sends the isosystem measurement order to UE, have under the different system coverage condition in geographic area, UE place, for example have under the gsm system sub-district coverage condition of 2G, require UE to carry out different system is measured, estimated quality to different system is measured, and measurement result reported RNC, change state b over to from state a;
Step 2, the estimated quality of homogenous frequency signal is higher than certain predetermined threshold.At state b, RNC is resolving the isosystem measurement report simultaneously, and the homogenous frequency signal quality that UE reports is higher than a certain predetermined threshold, shows that then the signal quality of WCDMA system can satisfy the business demand of UE, from the state b a that gets the hang of;
Step 3, RNC receives reporting event 3C.At state b, UE carries out isosystem measurement, if RNC receives the 3C measurement report event that is reported by UE, RNC gets off the different system cell information stores that comprises in the reported event, from the state b c that gets the hang of;
Step 4, RNC receives reporting event 3D.At state c, UE carries out isosystem measurement, if RNC receives the 3D measurement report event that is reported by UE, then carries out the renewal of different system best cell, remains on state c;
Step 5, RNC receives reporting event 3B.At state c, UE carries out isosystem measurement, satisfies incident 3B if report in the different system of RNC all sub-districts, from the state c b that gets the hang of; Satisfy incident 3B if report the different internal system branch sub-district of RNC, then delete this part sub-district, remain on state c;
Step 6, the estimated quality of homogenous frequency signal is higher than certain predetermined threshold.At state c, RNC is resolving the isosystem measurement report simultaneously, and the homogenous frequency signal quality that UE reports is higher than a certain predetermined threshold, shows that then the signal quality of WCDMA system can satisfy the business demand of UE, from the state c a that gets the hang of;
Step 7, RNC receives reporting event 3A.Have a plurality ofly if cell quality satisfies the sub-district of incident 3A, then in these sub-districts, do corresponding the selection, promptly select to measure top-quality sub-district.When carrying out the selection of sub-district, do the foundation of selection, select optimum subdistrict to carry out different system direct-cut operation, from the state c d that gets the hang of with reference to the best cell of storage in the 4th step.
Above-mentioned different system method for hard switching is characterized in that in the step 1, and at state a, the condition of initiating isosystem measurement also comprises: small area jam, or link-quality reduces, user terminal moves to cell boarder, or soft handover is not allowed in the system.
Above-mentioned different system method for hard switching is characterized in that in the step 3, only just can switch the negative effect of avoiding unnecessary switching that system itself is brought when the signal quality of different system cell satisfies certain condition.
Above-mentioned different system method for hard switching, it is characterized in that in step 4, the different system cell information stores that measures is got off and compare ordering, draw the sub-district of best in quality, so that select satisfied different system cell to do different system direct-cut operation when carrying out to handle switching.
On different system method for hard switching, it is characterized in that in step 5, the different system cell information stores that measures is got off and compare, draw second-rate sub-district, it is deleted to a certain degree the time when its quality is low, be of value to and avoid in memory, preserving too much unnecessary different system cell information.
Above-mentioned different system method for hard switching, it is characterized in that in step 2,6, UE reports the measurement report with frequency, alien frequencies and different system simultaneously, the system that makes can be in time according to the signal present situation of wireless network, the carrier frequency of UE business demand is satisfied in selection, has also embodied the mutual scheduling of switching an overall module sub-intermodule.
Above-mentioned different system method for hard switching, it is characterized in that in step 7, have only when the signal quality of different system cell acquires a certain degree, promptly can fully satisfy and switch requirement, and when current professional of enough ability carrying UE arranged, just carry out different system direct-cut operation, guaranteed the success rate of direct-cut operation, avoid doing frequent switching at cell boarder.
In case of emergency, for example the 3G cell quality for UE service sharply descends, have UE to initiate higher business demand suddenly in the sub-district makes that the covering of sub-district reduces, load increases the generation that causes problems such as other UE signaling delays, call drop, can adopt the different system method for hard switching of emergency, i.e. single event judgement.Usually, utilize the judgment condition of the estimated quality of common frequency measurement in the WCDMA system as emergency.When the estimated quality of the common frequency measurement of WCDMA system is lower than predetermined threshold, then change the changing method of single event judgement into from conventional changing method.
A kind of different system method for hard switching that is used for WCDMA system emergency that we are bright, these method concrete steps are as follows:
Step 1, RNC initiates isosystem measurement.At state a, RNC sends the isosystem measurement order to UE, in order, notify UE, no longer do the judgement of incident 3B, 3C and 3D, require UE no longer to report this three incidents, reduce simultaneously incident 3A the triggering thresholding, shorten the triggered time of 3A incident, and will adjust result notification UE, from the state a b that gets the hang of;
Step 2, the estimated quality of homogenous frequency signal is higher than certain predetermined threshold.At state b, RNC is resolving the isosystem measurement report simultaneously, and the homogenous frequency signal quality that UE reports is higher than a certain predetermined threshold, shows that then the signal quality of WCDMA system can satisfy the business demand of UE, from the state b a that gets the hang of;
Step 3 is reported different system information.As long as different system information is arranged in the measurement report, then from the state b c that gets the hang of, so just shortened the cycle of switch decision, the while has also been reduced the difficulty of switch decision;
Step 4, the estimated quality of homogenous frequency signal is higher than certain predetermined threshold.At state c, RNC is resolving the isosystem measurement report simultaneously, and the homogenous frequency signal quality that UE reports is higher than a certain predetermined threshold, shows that then the signal quality of WCDMA system can satisfy the business demand of UE, from the state c a that gets the hang of;
Step 5 is received reporting event 3A.At state c, as long as RNC receives to such an extent that the reported event of UE is incident 3A, directly select top-quality sub-district in the different system cell according to the different system cell relevant information that comprises in the reported event, carry out different system direct-cut operation, then from the state c d that gets the hang of.
Different system method for hard switching in above-mentioned emergency of the present invention has omitted the step 4 in the conventional method, 5, makes that in case of emergency can carry out different system rapidly, effectively switches, and guarantees that UE can obtain the service of good quality.Characteristics such as the different system of above-mentioned emergency method for hard switching is in the urgent situation about switching of needs that the 3G cell edge is run into from having solved UE in fact, has judgement cycle weak point, and executive condition is simple.
The different system of above-mentioned emergency method for hard switching, it is characterized in that in step 1, when emergency takes place, RNC is in the measurement control order that sends to UE, define the incident that UE reports and the decision threshold and the triggered time of incident, this operation makes UE in case of emergency can switch to different system cell as soon as possible.
The different system of above-mentioned emergency method for hard switching, it is characterized in that in step 1,5, RNC has stipulated that in case of emergency UE only reports the 3A incident, the triggering thresholding and the triggered time of 3A incident have been stipulated simultaneously, when enforcement of the judgment, only use the 3A incident, the cycle of switch decision has been shortened in these a series of operations, has also reduced simultaneously the difficulty of switch decision, makes that system is easier to find different system cell to do hand-off process.
The different system of above-mentioned emergency method for hard switching is characterized in that: receive emergency notification whenever, all will change the emergency processing mode over to, avoid call drop to guarantee the connection that in case of emergency keeps professional as early as possible.
In the method for the invention, the measurement of the amount of information such as CPICH information of the sub-district that the RNC described in the above-mentioned steps 1 comprises measuring amount that the different system cell of UE end is measured in the measurement control order that UE sends, need to measure, filtration coefficient, report cycle and the co-frequency cell of measurement, the mode initialization that reports with the measurement report of UE is a reporting events simultaneously; Sub-district, UE place and neighboring BS information comprise signal power, transmit diversity sign of main scrambler, the Primary Common Pilot Channel of sub-district etc.
When using method of the present invention, use the different system method for hard switching of regular situation as far as possible.Because having reached fully, existing 2G network covers, when 3G network first stage of construction layout, the edge of each sub-district of 3G network is arranged on the covering concentrated area of 2G network as far as possible, make different system direct-cut operation can find the different system cell that is fit to switching as soon as possible, shorten the time decision of switching.And in existing 2G network, the overlapping covering of sub-district and the erratic behavior of arranging net are arranged net our 3G can not reach desirable effect, inevitably, cell boarder area at 3G network, it equally also may be the cell edge of 2G network, like this, just need on realizing, system unify configuration to the needed various parameters of different system method for hard switching of this our bright regular situation and emergency, configure corresponding mode trigger condition, being lower than predetermined threshold as the 3G system carrier signal quality that measures with UE is trigger condition, in case with frequently believe estimated quality be lower than this setting thresholding, start the emergency changing method immediately.When conventional changing method and emergency changing method are provided with parameter, can higher threshold value be set to each incident for conventional changing method, fully satisfy the business demand of UE to guarantee sub-district that UE switches to; For the emergency changing method, threshold value that can be lower to each incident setting guarantees that UE can in time, promptly switch to other sub-districts, keeps the continuity of UE business, avoids the generation of call drop as far as possible.
In the method for the invention, a sub-district number average of being reported in each reported event is more than or equal to 1.Described W value is between 0.3 to 0.8.Corresponding sluggish value is between 1.5dB to 3dB in each judgement incident.
Be the effect that said method of the present invention is obtained in force, in to WCDMA systems organization layout, should take the following step: 1) guarantee to cover continuously: statistics WCDMA user's distribution by existing 2G network, area in WCDMA user's rareness provides continuous covering by existing 2G network, and the hot zones emphasis covers; 2) guarantee different system direct-cut operation success rate: for fear of the call drop phenomenon that causes owing to handoff failure, need avoid coincidence Zone switched between system aspect the programming and distribution as far as possible, that is to say, try one's best the Zone switched emphasis area of coverage that is arranged on the 2G network of WCDMA, when the UE that guarantees in the WCDMA system carries out different system direct-cut operation, can there be enough resource reservation the sub-district of 2G network, is used for the business of UE in the WCDMA system.
Method logic of the present invention is reasonable, efficient is high, can guarantee effective realization of desired different system of WCDMA system direct-cut operation well, and improve the signal quality of telex network in the mode of optimum, reduce the transmitting power of UE, and to the interference of other sub-districts.The bright described method of we can reduce call drop phenomenon odds from two aspects.First aspect by the reasonable parameter setting with to the integrated treatment of common frequency measurement in the WCDMA system, can be avoided frequent switching.Because different system direct-cut operation each time all has the risk of call drop, can reduce the call drop phenomenon by reducing the number of times that switches generation.Method of the present invention is divided into conventional method and emergency method, and be provided with the condition that enters emergency, both can guarantee in case of emergency to make UE switch to different system cell as soon as possible, the possibility that also can prevent to make UE be in the circumstances of frequent switching and increase call drop will greatly influence service quality.In fact, at isosystem measurement state b and the different hard handoff decision state c of system, if the estimated quality of the common frequency measurement that UE reports improves, emitting the risk of call drop to carry out the direct-cut operation operation of different system with regard to there is no need, therefore in conventional method of the present invention and emergency method, all comprise the step that turns back to state a from state b or state c.Second aspect, in case emergency takes place, UE needs to realize as early as possible different system direct-cut operation really, emergency method of the present invention can switch to UE different system cell at once and guarantee professional continuity, in the different system of emergency of the present invention method for hard switching, owing to need the incident of judgement simple, and when arranging net and the collocation of 2G system in conjunction with 3G, can guarantee in time the UE direct-cut operation to be arrived satisfied different system cell, guarantee when the cell quality of native system current service descends rapidly, not influence service quality UE.
Description of drawings
Fig. 1 is state and the step schematic diagram that the present invention is based on the hard blanking method of different system that Event triggered reports;
Fig. 2 the present invention is based on the in emergency circumstances different system that Event triggered reports to cut the certainly state and the step schematic diagram of method firmly;
Fig. 3 is the cell structure schematic diagram of the gsm system collocation of the WCDMA system of 3G and 2G;
Fig. 4 is the schematic diagram of the basic technique principle of switch determining method in expression the inventive method;
Fig. 5 utilizes the different system that reports based on Event triggered of the inventive method to cut embodiment firmly.
Embodiment
The measurement result that the UE Event triggered reports in the bright WCDMA of making full use of of the we system, in RNC, signal quality and current native system cell signal quality to each different system cell that UE monitored are carried out comprehensive assessment, thereby whether decision is necessary to carry out different system direct-cut operation.
Be described in further detail below in conjunction with the enforcement of accompanying drawing technical scheme.
At each state that adopts the different system method for hard switching that is used for the broadband CDMA system emergency under the regular situation of the present invention and method step as shown in Figure 1.
In step 1 shown in Figure 1, RNC sends the isosystem measurement order to UE, the filtration coefficient (being used for carrying out measured value at UE must filter) of the physical quantity that appointment UE need measure, the physical quantity that reports, measurement, the cell information of measuring, measurement report side is set at Event triggered and reports mode, the reporting at interval etc. and switch relevant parameter of the quantity of the measurement report that reports, measurement report.Its purpose allows UE measure according to the concrete needs that RNC provides, wherein some information the measurement result that can make things convenient for UE to report algorithmic decision to need is provided, help going out fast court verdict and carry out different system and switch.
In step 2 shown in Figure 1, UE is according to the isosystem measurement order of RNC, when carrying out isosystem measurement, maintenance is measured current WCDMA system same frequency, in case have the sub-district to satisfy the current business demand of UE in the current WCDMA system, RNC can notify UE to stop isosystem measurement at once, promptly returns the common frequency measurement state.If following WCDMA system development also needs to carry out different-frequency measure to using the covering of multilayer sub-district and introducing a plurality of carrier frequency thus.At this moment, if find that at the intrasystem different-frequency measure of WCDMA alien-frequency district satisfies the UE service needed, RNC also can stop isosystem measurement at once, avoids different system to switch and takes place.
In step 3 shown in Figure 1, UE is after receiving measuring control information, according to the specific requirement in the order, begin to carry out isosystem measurement, and utilize the filtration coefficient of giving in the measurement control order that measurement result is filtered, when measurement result satisfies the condition of reported event 3C, incident 3C is uploaded to RNC with measurement report message.The measurement result that all UE report makes RNC when carrying out switch decision, and sufficient reference frame is arranged.When UE reports the 3C incident, change different system hard handoff decision state over to, this moment, RNC got off the different system cell information stores that comprises in the reported event, and wait measurement result is after this adjudicated.
In step 4 shown in Figure 1, UE reporting measurement incident 3D, then carry out the renewal of different system best cell, because more than one of the sub-district that in incident 3C, reports before this, and incident also is constantly to report, so can sort according to quality in the sub-district of storage, have only the estimated quality of certain sub-district in the different system to be higher than predetermined threshold T3D, just can be lined up as the best cell candidate in this sub-district, when queuing, can only make number one the highest sub-district of estimated quality, on incident 3D, give the correct time, just switch as best cell to arrange first sub-district.The introducing purpose of incident 3D mainly is when judgement subsequently, does reference frame for determining the sub-district that different system direct-cut operation is carried out.
In step 5 shown in Figure 1, UE reporting measurement incident 3B, if at the different hard handoff decision state c of system, the different system cell of storing among the RNC all satisfies incident 3B, then returns isosystem measurement state b, waits new different system cell information to be reported; If have only part sub-district estimated quality to satisfy incident 3B in the different system, then delete this part sub-district.Because more than one of the sub-district that reports in incident 3C before this, and incident also is constantly to report, so can sort according to quality in the sub-district of storage, switches when requiring when the cell quality of preserving can't satisfy, and deletes these sub-districts.The introducing purpose of 3B incident mainly is in order to reduce unnecessary sub-district in judgement subsequently, when the signal quality of different system cell can not satisfy the current business demand of UE, just there is no need corresponding switch decision is being done in these sub-districts, delete these sub-districts inferior can mitigation system to the burden of different system hard handoff decision.
In step 6 shown in Figure 1, UE is according to the measuring command indication of RNC, when carrying out isosystem measurement, maintenance is to the measurement of current system, in case current WCDMA system has the sub-district to satisfy the current business demand of UE, RNC can notify UE to stop isosystem measurement at once, from return common frequency measurement state a at c.If the WCDMA system is developing into a plurality of frequencies of application multilayer sub-district covering introducing in the future, different-frequency measure also will carry out simultaneously.If different-frequency measure is found the alien-frequency district of WCDMA system and can satisfy the UE service needed that RNC also can stop isosystem measurement and different system hard handoff decision, avoids system to do unnecessary operation at once.
In step 7 shown in Figure 1, UE reporting measurement incident 3A, this moment is at state c, if cell quality satisfy the sub-district of incident 3A may more than one, need in these sub-districts, do corresponding the selection, obviously, should select top-quality sub-district.When carrying out cell selecting, the necessity of the operation of doing in the 4th, 5 steps as can be seen, the best cell that RNC stored during we can go on foot with reference to the 4th be done different system switching cell, carries out different system direct-cut operation, and RNC sends switching command to UE, and d gets the hang of.Simultaneously, by the operation of step 5, avoided unnecessary judgement selection course.
Fig. 2 is state and the step schematic diagram that reports different system direct-cut operation control method as the Event triggered that solves emergency, and this method is in order to guarantee that UE in case of emergency can switch to different system cell as soon as possible.
In step 1 shown in Figure 2, at state a, UE keeps the common frequency measurement state of soft handover in the WCDMA system always, occurs obviously reducing in case judge the estimated quality of common frequency measurement, promptly judges when being in an emergency, RNC sends the isosystem measurement order to UE, notice UE no longer does the judgement of incident 3B, 3C and 3D in order, and requires UE no longer to report this three incidents, reduces the triggering thresholding T3Aother of incident 3A simultaneously, and the triggered time of the incident of shortening 3A, and will adjust result notification UE.
In step 2 shown in Figure 2, at state b, UE keeps the measurement to homogenous frequency signal constantly, in case the homogenous frequency signal estimated quality that UE measures is higher than a certain thresholding, both the WCDMA system satisfied the business demand of UE, and homogenous frequency signal satisfies soft handoff condition in the WCDMA system, from state b return state a.What need state is that measurement at this moment is that common frequency measurement and isosystem measurement carry out simultaneously, and WCDMA system development in the future also will be carried out at the intrasystem different-frequency measure of WCDMA simultaneously to a plurality of frequencies of application multilayer sub-district covering introducing.
In step 3 shown in Figure 2, as long as there is different system in expression in the report of different system hard information, then from the state b c that directly gets the hang of.
In step 4 shown in Figure 2, at state c, in a single day UE finds that common-frequency cell signal is higher than a certain thresholding, then from state c return state a.What need statement is, still need UE to measure this moment, and measurement is that common frequency measurement and isosystem measurement carry out simultaneously, and WCDMA develops into and uses the multilayer sub-district and cover and introduce a plurality of frequencies in the future, also will carry out simultaneously at the intrasystem different-frequency measure of WCDMA.
In step 5 shown in Figure 2, UE reporting measurement incident 3A then directly selects best cell to carry out different system direct-cut operation.
Fig. 3 is the cell structure schematic diagram of for example gsm system collocation of the WCDMA system of 3G and 2G.As shown in Figure 3, arrange net the initial stage, need realize the continuous covering of mobile communications network, will inevitably introduce the direct-cut operation of different system in the case by the 2G network at 3G.Though at the 3G network layout initial stage, should make the cell edge of 3G network be in the emphasis area of coverage of 2G network as far as possible, but because the restriction of geographical environment and the influence that wireless environment causes, Zone switched overlappingly still can not avoid fully between 3G system and the 2G system.As shown in Figure 3, the residing zone of user A exists the base station (Node B) of WCDMA system to cover in the drawings, also exists the base station (BS) of different system gsm system to cover simultaneously.If user A this moment continues to move to the direction away from NodeB, then can't carry out the intrasystem soft handover of WCDMA, so different system direct-cut operation will be a unique selection.Multiple measurement reported event will appear in the measurement of the user A of this moment simultaneously.Accordingly, in the isosystem measurement reported event,, probably comprise the information of a plurality of 2G cells in the isosystem measurement report that at this moment reports because user A is in the overlapping area of coverage at 2G system cell edge.If the common frequency measurement result does not satisfy the emergency condition, then adopt the different system of routine of the present invention method for hard switching, RNC is that best different system cell of selection is carried out in final switching, and carries out different system direct-cut operation and handle.At user B shown in Figure 3, translational speed is very fast, and moving direction will leave the coverage of NodeB at once away from Node B.At this moment, the common frequency measurement result can show that the signal quality of WCDMA system descends fast, meets the emergency condition.At this moment, take emergency changing method of the present invention, switch to the sub-district of different system rapidly, guarantee professional continuity so that guarantee UE.At user C shown in Figure 3, this user initiates to take the many data services of Radio Resource, and current area in the WCDMA system is caused certain influence, if bigger to other QoS of customer influences in the sub-district, RNC can determine user C is switched away the WCDMA system.If RNC judges that user C is bigger to whole sub-district quality of service impacts degree, then adopt the emergency changing method, fast user C is switched to the 2G system; Otherwise if user C is less to the influence of WCDMA system cell, conventional changing method is adopted in the RNC decision.
Fig. 4 is the schematic diagram of the basic technique principle of switch determining method in expression the inventive method, and this switch determining method has been embodied in regular situation of the present invention different system direct-cut operation and the different system of the emergency method for hard switching.
Fig. 5 is that Event triggered reports the different hard handoff decision embodiment of system.The comprehensive assessment quality of two system cell carrier frequency is arranged among Fig. 5, and solid line 1 is represented the estimated quality of common frequency measurement in the WCDMA system, the estimated quality of two 2G cells around dotted line 2 and the 2 ' UE.The estimated quality T3B of system and T3C are respectively the predetermined threshold of incident 3B and incident 3C among Fig. 5, estimated quality T3A for own system is the estimated quality predetermined threshold that current WCDMA system same frequency is measured among the incident 3A, and estimated quality T3A for other system is the predetermined threshold of different system estimation quality among the incident 3A.
As shown in Figure 5, the starting stage before t1, UE works on the WCDMA system carrier frequency, and RNC starts isosystem measurement at this moment.As shown in Figure 5, the estimated quality of the estimated quality curve of WCDMA system 1 expression is in downward trend generally always, and two cell carrier frequencies signal quality curve 2 of 2G system and 2` have the trend of continuous rising.The signal quality of WCDMA system can also satisfy the business demand of UE at this moment, can also continue to use.
As shown in Figure 5, at t1 constantly, the CF signal figure-of-merit curve 2 of a sub-district of 2G system reaches predetermined threshold T3C, and has kept the t time.At this moment, UE reports the 3C incident, and RNC analyzes incident, and this sub-district 2 of being reported among the storage incident 3C is as the foundation of later judgement.
As shown in Figure 5, at t2 constantly, the CF signal figure-of-merit curve 2 and the 2` of two sub-districts of 2G system change on intensity, and have continued the t time.At this moment, UE reports the 3D incident, and RNC analyzes incident 3D, and two sub-district estimated quality curves 2 and 2` queuing are compared, and the different system cell that estimated quality is the highest is done best cell and is stored among the RNC, in order to for referencial use in enforcement of the judgment subsequently.
As shown in Figure 5, at t3 constantly, the estimated quality of the carrier frequency 2 ' of a sub-district of 2G system reaches below the predetermined threshold T3B, and has continued the t time.At this moment, UE reports the 3B incident, and RNC analyzes incident 3B, with the different system cell 2 ' deletion of storage, no longer 2G cell carrier frequency 2 ' is done judgement in judgement subsequently.
As shown in Figure 5, at t4 constantly, the estimated quality curve 1 of the WCDMA common frequency measurement of 3G system is lower than certain thresholding T3A for own system, and the cell carrier frequencies 2 of 2G system is higher than certain thresholding T3A for other system simultaneously, and has continued the t time.At this moment, UE reports the 3A incident, and RNC analyzes incident 3A, selects 2G system cell carrier frequency 2 to carry out different system direct-cut operation.
Though abovely narrated the present invention by embodiment, these specific embodiments are not to be used for protection scope of the present invention is limited.Scope of the present invention should not be confined to these concrete examples, but can cover based on the various modification of the foregoing description and be equal to or the technical scheme of equivalence.
Claims (14)
1. different system method for hard switching that is used for broadband CDMA system, these method concrete steps are as follows:
Step 1, RNC initiates isosystem measurement; At state a, if the estimated quality of UE common frequency measurement in the measured WCDMA system of RNC report is lower than a certain predetermined threshold, then initiate isosystem measurement, promptly the radio network controller (RNC) by the WCDMA system sends the isosystem measurement order to UE, have under the different system coverage condition in geographic area, UE place, require UE to carry out different system is measured, the estimated quality of different system is measured, and measurement result reported RNC, change state b over to from state a;
Step 2, the estimated quality of homogenous frequency signal is higher than certain predetermined threshold; At state b, RNC is resolving the isosystem measurement report simultaneously, and the homogenous frequency signal quality that UE reports is higher than a certain predetermined threshold, shows that then the signal quality of WCDMA system can satisfy the business demand of UE, from the state b a that gets the hang of;
Step 3, RNC receives reporting event 3C; At state b, UE carries out isosystem measurement, if RNC receives the 3C measurement report event that is reported by UE, RNC gets off the different system cell information stores that comprises in the reported event, from the state b c that gets the hang of;
Step 4, RNC receives reporting event 3D; At state c, UE carries out isosystem measurement, if RNC receives the 3D measurement report event that is reported by UE, then carries out the renewal of different system best cell, remains on state c;
Step 5, RNC receives reporting event 3B; At state c, UE carries out isosystem measurement, satisfies incident 3B if report in the different system of RNC all sub-districts, from the state c b that gets the hang of; Satisfy incident 3B if report the different internal system branch sub-district of RNC, then delete this part sub-district, remain on state c;
Step 6, the estimated quality of homogenous frequency signal is higher than certain predetermined threshold; At state c, RNC is resolving the isosystem measurement report simultaneously, and the homogenous frequency signal quality that UE reports is higher than a certain predetermined threshold, shows that then the signal quality of WCDMA system can satisfy the business demand of UE, from the state c a that gets the hang of;
Step 7, RNC receives reporting event 3A; Have a plurality ofly if cell quality satisfies the sub-district of incident 3A, then in these sub-districts, do corresponding the selection, promptly select to measure top-quality sub-district.When carrying out the selection of sub-district, do the foundation of selection, select optimum subdistrict to carry out different system direct-cut operation, from the state c d that gets the hang of with reference to the best cell of storage in the 4th step.
2. different system method for hard switching that is used for the broadband CDMA system emergency, these method concrete steps are as follows:
Step 1, RNC initiates isosystem measurement; At state a, RNC sends the isosystem measurement order to UE, in order, notify UE, no longer do the judgement of incident 3B, 3C and 3D, require UE no longer to report this three incidents, reduce simultaneously incident 3A the triggering thresholding, shorten the triggered time of 3A incident, and will adjust result notification UE, from the state a b that gets the hang of;
Step 2, the estimated quality of homogenous frequency signal is higher than certain predetermined threshold; At state b, RNC is resolving the isosystem measurement report simultaneously, and the homogenous frequency signal quality that UE reports is higher than a certain predetermined threshold, shows that then the signal quality of WCDMA system can satisfy the business demand of UE, from the state b a that gets the hang of;
Step 3 is reported different system information; As long as different system information is arranged in the measurement report, then from the state b c that gets the hang of, so just shortened the cycle of switch decision, the while has also been reduced the difficulty of switch decision;
Step 4, the estimated quality of homogenous frequency signal is higher than certain predetermined threshold; At state c, RNC is resolving the isosystem measurement report simultaneously, and the homogenous frequency signal quality that UE reports is higher than a certain predetermined threshold, shows that then the signal quality of WCDMA system can satisfy the business demand of UE, from the state c a that gets the hang of;
Step 5 is received reporting event 3A; At state c, as long as RNC receives to such an extent that the reported event of UE is incident 3A, directly select top-quality sub-district in the different system cell according to the different system cell relevant information that comprises in the reported event, carry out different system direct-cut operation, then from the state c d that gets the hang of.
3. different system according to claim 1 and 2 method for hard switching, wherein the concrete execution in step in each state is as follows:
State a: be called the common frequency measurement state, UE keeps each required cellular downlink carrier frequency of soft handover in the WCDMA system is measured under this state, and report the estimated quality of the common frequency measurement that calculates according to measurement result, report the information of measured sub-district in the WCDMA system simultaneously;
State b: be called the isosystem measurement state, RNC sends the isosystem measurement order to UE under this state, by UE the signal of different system peripheral cell is measured, and the reporting measurement result, measured the received signal intensity indication (RSSI) of carrier wave in the gsm system for example usually;
State c: be called different system hard handoff decision state, the relevant information of the different system cell that comprises in the incident that RNC reports UE stores, and waits for subsequent measurement;
State d: be called the switching executing state, RNC carries out different system direct-cut operation, and UE is switched to the 2G system from the WCDMA system of 3G.
4. different system according to claim 1 method for hard switching is characterized in that in the step 1, at state a, the condition of initiating isosystem measurement also comprises: small area jam, or link-quality reduces, or user terminal moves to cell boarder, or soft handover is not allowed in the system.
5. different system according to claim 1 method for hard switching is characterized in that in the step 3, only just can switch the negative effect of avoiding unnecessary switching that system itself is brought when the signal quality of different system cell satisfies certain condition.
6. different system according to claim 1 method for hard switching, it is characterized in that in step 4, the different system cell information stores that measures is got off and compare ordering, draw the sub-district of best in quality, handle so that when switching execution, select satisfied different system cell to do different system direct-cut operation.
7. different system according to claim 1 method for hard switching, it is characterized in that in step 5, the different system cell information stores that measures is got off and compare, draw second-rate sub-district, it is deleted to a certain degree the time when its quality is low, be of value to and avoid in memory, preserving too much unnecessary different system cell information.
8. different system according to claim 1 method for hard switching, it is characterized in that in step 2,6, UE reports the measurement report with frequency, alien frequencies and different system simultaneously, the system that makes can be in time according to the signal present situation of wireless network, the carrier frequency of UE business demand is satisfied in selection, has also embodied the mutual scheduling of switching an overall module sub-intermodule.
9. different system according to claim 1 method for hard switching, it is characterized in that in step 7, have only when the signal quality of different system cell acquires a certain degree, promptly can fully satisfy and switch requirement, and when current professional of enough ability carrying UE arranged, just carry out different system direct-cut operation, guaranteed the success rate of direct-cut operation, avoid doing frequent switching at cell boarder.
10. the different system of emergency according to claim 2 method for hard switching, it is characterized in that in step 1, when emergency takes place, RNC is in the measurement control order that sends to UE, define the incident that UE reports and the decision threshold and the triggered time of incident, this operation makes UE in case of emergency can switch to different system cell as soon as possible.
11. the different system of emergency according to claim 2 method for hard switching, it is characterized in that in step 1,5, RNC has stipulated that in case of emergency UE only reports the 3A incident, the triggering thresholding and the triggered time of 3A incident have been stipulated simultaneously, when enforcement of the judgment, only use the 3A incident, the cycle of switch decision has been shortened in these a series of operations, has also reduced simultaneously the difficulty of switch decision, makes that system is easier to find different system cell to do hand-off process.
12. the different system of emergency according to claim 2 method for hard switching is characterized in that: receive emergency notification whenever, all will change the emergency processing mode over to, avoid call drop to guarantee the connection that in case of emergency keeps professional as early as possible.
13. in claim 1 or 2 different system method for hard switching, it is characterized in that: in the described step 1 RNC in the measurement control order that UE sends, comprise measuring amount that the different system cell of UE end is measured, the measurement of the amount of information such as CPICH information of filtration coefficient, report cycle and the co-frequency cell of the sub-district that needs to measure, measurement, the mode initialization that reports with the measurement report of UE is a reporting events simultaneously; Sub-district, UE place and neighboring BS information comprise signal power, transmit diversity sign of main scrambler, the Primary Common Pilot Channel of sub-district etc.
14. different system according to claim 1 and 2 method for hard switching, applied WCDMA system is taked the following step: first, statistics WCDMA user's distribution provides continuous covering in the area of WCDMA user's rareness by existing 2G network, and the hot zones emphasis covers; Second, on dividing, the WCDMA system cell avoids coincidence Zone switched between system, be about to the Zone switched emphasis area of coverage that is arranged on the 2G network of WCDMA, when the UE that guarantees in the WCDMA system carries out different system direct-cut operation, can there be enough resource reservation the sub-district of 2G network, is used for the business of UE in the WCDMA system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100690629A CN100362903C (en) | 2005-05-11 | 2005-05-11 | A method of hard switch between heterogeneous systems for WCDMA system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100690629A CN100362903C (en) | 2005-05-11 | 2005-05-11 | A method of hard switch between heterogeneous systems for WCDMA system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1671243A true CN1671243A (en) | 2005-09-21 |
| CN100362903C CN100362903C (en) | 2008-01-16 |
Family
ID=35042262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100690629A Active CN100362903C (en) | 2005-05-11 | 2005-05-11 | A method of hard switch between heterogeneous systems for WCDMA system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100362903C (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1988710B (en) * | 2005-12-20 | 2010-06-09 | 中兴通讯股份有限公司 | Method and system for controlling MAC state shifting |
| CN101047951B (en) * | 2006-03-27 | 2010-06-16 | 中兴通讯股份有限公司 | Media access control station transport method in radio communication system |
| CN101808358A (en) * | 2009-02-18 | 2010-08-18 | 株式会社Ntt都科摩 | Measurement switching method and device in mobile communication |
| CN101931988A (en) * | 2009-06-26 | 2010-12-29 | 华为技术有限公司 | Network switching method, evolution base station and communication system |
| CN101938771A (en) * | 2009-07-01 | 2011-01-05 | 大唐移动通信设备有限公司 | Method, system and equipment for determining base station controller in terminal switching process |
| CN102026269A (en) * | 2009-09-17 | 2011-04-20 | 中兴通讯股份有限公司 | Optimization method for measuring reporting triggering time parameter and device thereof |
| CN101247621B (en) * | 2008-03-28 | 2011-05-04 | 北京天碁科技有限公司 | TD-SCDMA signal estimation method for measuring 3a event and 3a event detecting report method |
| CN101064956B (en) * | 2006-04-28 | 2011-06-15 | 华为技术有限公司 | Method for switching user equipment of long-term evolvement network between difference systems |
| CN1852606B (en) * | 2005-12-27 | 2012-08-15 | 华为技术有限公司 | Method for controlling switch-over of mobile communication network |
| CN101772120B (en) * | 2009-01-07 | 2012-10-31 | 鼎桥通信技术有限公司 | Switch method, system and equipment based on downlink communication quality report |
| WO2015035807A1 (en) * | 2013-09-10 | 2015-03-19 | 中兴通讯股份有限公司 | Different frequency measurement and evaluation method and apparatus of cluster answering user |
| US9008581B2 (en) | 2009-11-08 | 2015-04-14 | Intel Mobile Communications GmbH | Radio devices and methods for controlling radio devices |
| CN106851751A (en) * | 2010-04-27 | 2017-06-13 | 三星电子株式会社 | The apparatus and method that switching support information is provided in mobile communication system |
| CN108024276A (en) * | 2016-11-04 | 2018-05-11 | 中国移动通信有限公司研究院 | A kind of data transmission method for uplink and terminal |
| CN108934040A (en) * | 2017-05-25 | 2018-12-04 | 中国电信股份有限公司 | Different system covering quality acquisition methods, device and system |
| CN110099394A (en) * | 2018-01-29 | 2019-08-06 | 展讯通信（上海）有限公司 | The implementation method of different-frequency measure and isosystem measurement, device and user equipment |
| WO2021223138A1 (en) * | 2020-05-07 | 2021-11-11 | Qualcomm Incorporated | Improving cell selection over new radio |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11355831A (en) * | 1998-04-10 | 1999-12-24 | Nec Corp | Hand-off method to different communication-type cellular system base station in cdma cellular system, and the cellular system |
| US6850505B1 (en) * | 1999-09-01 | 2005-02-01 | Telefonaktiebolaget L M Ericsson (Publ) | Method and apparatus for Doppler frequency estimation |
| CN1168327C (en) * | 2001-12-24 | 2004-09-22 | 华为技术有限公司 | Witching method between systems |
| CN1324828C (en) * | 2002-06-11 | 2007-07-04 | 华为技术有限公司 | Method for switching between different systems in CDMA communication system |
| CN100454794C (en) * | 2002-08-08 | 2009-01-21 | 中兴通讯股份有限公司 | Hard switchover judging method for wide band CDMA system |
-
2005
- 2005-05-11 CN CNB2005100690629A patent/CN100362903C/en active Active
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1988710B (en) * | 2005-12-20 | 2010-06-09 | 中兴通讯股份有限公司 | Method and system for controlling MAC state shifting |
| CN1852606B (en) * | 2005-12-27 | 2012-08-15 | 华为技术有限公司 | Method for controlling switch-over of mobile communication network |
| CN101047951B (en) * | 2006-03-27 | 2010-06-16 | 中兴通讯股份有限公司 | Media access control station transport method in radio communication system |
| CN101064956B (en) * | 2006-04-28 | 2011-06-15 | 华为技术有限公司 | Method for switching user equipment of long-term evolvement network between difference systems |
| CN101247621B (en) * | 2008-03-28 | 2011-05-04 | 北京天碁科技有限公司 | TD-SCDMA signal estimation method for measuring 3a event and 3a event detecting report method |
| CN101772120B (en) * | 2009-01-07 | 2012-10-31 | 鼎桥通信技术有限公司 | Switch method, system and equipment based on downlink communication quality report |
| CN101808358A (en) * | 2009-02-18 | 2010-08-18 | 株式会社Ntt都科摩 | Measurement switching method and device in mobile communication |
| CN101931988B (en) * | 2009-06-26 | 2013-08-28 | 华为技术有限公司 | Network switching method, evolution base station and communication system |
| CN101931988A (en) * | 2009-06-26 | 2010-12-29 | 华为技术有限公司 | Network switching method, evolution base station and communication system |
| CN101938771A (en) * | 2009-07-01 | 2011-01-05 | 大唐移动通信设备有限公司 | Method, system and equipment for determining base station controller in terminal switching process |
| CN101938771B (en) * | 2009-07-01 | 2012-12-05 | 电信科学技术研究院 | Method, system and equipment for determining base station controller in terminal switching process |
| CN102026269A (en) * | 2009-09-17 | 2011-04-20 | 中兴通讯股份有限公司 | Optimization method for measuring reporting triggering time parameter and device thereof |
| US9008581B2 (en) | 2009-11-08 | 2015-04-14 | Intel Mobile Communications GmbH | Radio devices and methods for controlling radio devices |
| US10602420B2 (en) | 2010-04-27 | 2020-03-24 | Samsung Electronics Co., Ltd. | Apparatus and method for providing handover support information in mobile communication system |
| CN106851751A (en) * | 2010-04-27 | 2017-06-13 | 三星电子株式会社 | The apparatus and method that switching support information is provided in mobile communication system |
| US11463925B2 (en) | 2010-04-27 | 2022-10-04 | Samsung Electronics Co., Ltd. | Apparatus and method for providing handover support information in mobile communication system |
| US10966129B2 (en) | 2010-04-27 | 2021-03-30 | Samsung Electronics Co., Ltd. | Apparatus and method for providing handover support information in mobile communication system |
| CN106851751B (en) * | 2010-04-27 | 2021-01-01 | 三星电子株式会社 | Apparatus and method for providing handover support information in mobile communication system |
| WO2015035807A1 (en) * | 2013-09-10 | 2015-03-19 | 中兴通讯股份有限公司 | Different frequency measurement and evaluation method and apparatus of cluster answering user |
| US9924423B2 (en) | 2013-09-10 | 2018-03-20 | Zte Corporation | Different frequency measurement and evaluation method and apparatus of cluster answering user |
| CN108024276A (en) * | 2016-11-04 | 2018-05-11 | 中国移动通信有限公司研究院 | A kind of data transmission method for uplink and terminal |
| CN108024276B (en) * | 2016-11-04 | 2021-05-04 | 中国移动通信有限公司研究院 | Data sending method and terminal |
| CN108934040A (en) * | 2017-05-25 | 2018-12-04 | 中国电信股份有限公司 | Different system covering quality acquisition methods, device and system |
| CN110099394A (en) * | 2018-01-29 | 2019-08-06 | 展讯通信（上海）有限公司 | The implementation method of different-frequency measure and isosystem measurement, device and user equipment |
| WO2021223138A1 (en) * | 2020-05-07 | 2021-11-11 | Qualcomm Incorporated | Improving cell selection over new radio |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100362903C (en) | 2008-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1671243A (en) | A method of hard switch between heterogeneous systems for WCDMA system | |
| CN100454794C (en) | Hard switchover judging method for wide band CDMA system | |
| CN101534518B (en) | Method for reporting measurement information, system and device thereof | |
| CN101572919B (en) | Method for carrying out switching strategy selection for user equipment (UE) in LTE system | |
| CN1197428C (en) | Inter-frequency measurement and handover for wireless communications | |
| CN1281010C (en) | Decision method for periodic report and channel interval hard switching | |
| CN101854684B (en) | Handover type based method for optimizing handover parameters in wireless celluar communication system | |
| JP4895548B2 (en) | Method for optimizing cell reselection behavior in a mobile network according to the UMTS standard or 3G standard | |
| US20120244869A1 (en) | Network scaling for network energy savings | |
| CN103999506A (en) | User equipment signaling traffic reduction | |
| CN101635949A (en) | Switching method in wireless cellular network | |
| WO2007136070A1 (en) | Mobile communication method, mobile station device, base station device, and mobile communication system | |
| CN103283280A (en) | Handover control method, control device, adjustment device, and non-emporary computer-readable medium | |
| CN101087472B (en) | Method for re-selecting cell of user device | |
| WO2009038368A1 (en) | Method of performing cell reselection procedure in wireless communication system | |
| CN1599471A (en) | Realization method and device for controlling load balance in communication system | |
| CN1832621A (en) | Switchover controll method of multiple frequency points system | |
| CN104581849A (en) | Residential quarter switch method | |
| CN105917700A (en) | Controlling handover of high-priority user equipment operating near cell edge | |
| CN1805592A (en) | Measurement control method for switching between mobile communication cells | |
| CN101061741A (en) | Enhanced dedicated-channel reporting for umts | |
| CN1146169C (en) | Method and control system for balancing loads between common frequency small regions in CDMA communication system | |
| CN103974350A (en) | Switching method for self-adaptive threshold adjustment | |
| CN105379355A (en) | Mobility enhancement in heterogeneous networks | |
| CN103650365A (en) | Configuration method of multiflow transmission, base station, radio network controller and user equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191014 Address after: 430073 Hubei province Wuhan Dongxin East Lake high tech Development Zone, Road No. 5 Patentee after: Wuhan Hongxin Communication Technology Co., ltd. Address before: 100085, beacon building, No. 5-3, East Road, Beijing, Haidian District Patentee before: Beifang Fenghuo Tech Co., Ltd., Beijing |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 430205 Hubei city of Wuhan province Jiangxia Hidden Dragon Island Tan lake two Road No. 1 Patentee after: CITIC Mobile Communication Technology Co., Ltd Address before: 430073 Hubei province Wuhan Dongxin East Lake high tech Development Zone, Road No. 5 Patentee before: Wuhan Hongxin Telecommunication Technologies Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 430205 No.1 tanhu 2nd Road, Canglong Island, Jiangxia District, Wuhan City, Hubei Province Patentee after: CITIC Mobile Communication Technology Co.,Ltd. Address before: 430205 No.1 tanhu 2nd Road, Canglong Island, Jiangxia District, Wuhan City, Hubei Province Patentee before: CITIC Mobile Communication Technology Co., Ltd |