CN101808358B

CN101808358B - Measurement switching method and device in mobile communication

Info

Publication number: CN101808358B
Application number: CN200910009335.9A
Authority: CN
Inventors: 李明菊; 佘小明; 陈岚
Original assignee: NTT Docomo Inc
Current assignee: NTT Docomo Inc
Priority date: 2009-02-18
Filing date: 2009-02-18
Publication date: 2015-04-15
Anticipated expiration: 2029-02-18
Also published as: JP2010193456A; JP5412624B2; CN101808358A

Abstract

The invention discloses a measurement switching method and a device in mobile communication. The method comprises that: a first object collection including one or a plurality of measurement objects is confirmed, a plurality of unit measurement time intervals Tunit are distributed to each measurement object in the first object collection in turn, one or a plurality of measurement objects are removed from the first object collection to obtain a second object collection, the unit measurement time intervals the measurement objects of which have been removed are redistributed, the signal strength of each measurement object in the second object collection is measured according to the correspondence relationship of the unit measurement time intervals and the measurement object in the second object collection after the redistribution and the measurement report is sent out according to the monitor situation of a measurement report trigger event. The invention can ensure the accuracy and timeliness of the measurement result.

Description

The method and apparatus of handover measurement in mobile communication

Technical field

The user that the present invention relates in mobile communication system switches, the method and apparatus of handover measurement in espespecially a kind of mobile communication.

Background technology

Cellular mobile telephone brings great convenience to the communication of people, second generation global system for mobile communications (Global System for Mobile Communication, GSM) adopt digital communication, further increase the speech quality of mobile communication.Third generation partner program (3rd GenerationPartnership Project, 3GPP) as the vital tissue of moving communicating field, promote G mobile communication (The Third Generation greatly, Standardization 3G), formulate a series of Wideband Code Division Multiple Access (WCDMA) that comprises and access (Wide Code Division Multiple Access, WCDMA), high-speed slender body theory (High Speed Downlink Packet Access, HSDPA), high speed uplink packet access (High Speed Uplink Packet Access, etc. HSUPA) at interior communications system specifications.

In order to tackle the challenge of broadband access technology, and meet the demand of growing new business, 3GPP will start 3G Long Term Evolution (Long Term Evolution in the end of the year 2004, LTE) standardization effort of technology, wish to improve spectrum efficiency further, improve the performance of Cell Edge User, reduce system delay, for high velocity mobile users provides the access service etc. of higher rate.Following LTE-A technology is especially on the basis of LTE, and several times increase spectral bandwidth, significantly improve data rate, for more mobile subscribers provide the service of higher rate, better performance.

In above-mentioned mobile communication system, the mobile management of user under connection (CONNECTED) state is particularly important.In order to realize, to user's ambulant management in connected state, defining switching in mobile communication system, the user being in connection status is allowed to be switched to other community when meeting certain condition.If do not switched, user accesses the situation of new community again there will be call drop when shifting out Serving cell after, can have a strong impact on customers' satisfaction level like this.

In general, switching comprises three mainly operations: measurement, switch decision, switching perform.Fig. 1 is the flow chart switched in conventional method, comprising:

Step 101-103: after the measurement that user receives serving BS to be provided configures, measure the Reference Signal Received Power (Received Signal Received Power, RSRP) of Serving cell and adjacent cell.When meeting certain condition, user sends measurement report to serving BS.

Step 104-105: serving BS determines whether switch, if so, then according to the signal strength signal intensity of adjacent cell each in measurement report, select a target BS, notify that user is switched to this target BS according to the measurement report received.

Step 106-107: user leaves serving BS after receiving the switching command from serving BS, carries out synchronous with target BS, access target BS.

As can be seen from above-mentioned handoff procedure, for switching, the accuracy of measurement report is even more important.If measurement report is inaccurate, serving BS will select an imperfect target BS of channel condition.Like this, can produce ping-pong after user is switched to target BS, even possibility call drop, has a strong impact on QoS of customer.

Consider the difference in target BS and serving BS place carrier frequency and access technology, switching can be divided into three kinds: with frequently switching, alien frequencies switches, different systematic evaluation.In the multi-layer Overlay Network shown in Fig. 2, multiple wireless access way coexists.

When target BS and serving BS belong to the same carrier frequency of same wireless access system, this switches to frequently switching.Such as, target BS and serving BS all at this one deck of LTE-A 3.4G (i.e. Indoor Thermal Vertex cover), then belong to frequently switching.When target BS and serving BS belong to same system but different carrier frequency time, this switches to alien frequencies to switch.Such as, serving BS is at LTE-A 3.4G layer, and target BS at LTE-A 2.5G layer, then belongs to alien frequencies and switches.When target BS and serving BS belong to different radio connecting system, this switches to different systematic evaluation.Such as, serving BS is at LTE-A 800M layer, and target BS at WCDMA layer, then belongs to different systematic evaluation.

Different switchings needs to adopt dissimilar measurement, as shown in table 1.

Table 1 switches and measures type

Switch for frequency, because target BS and serving BS are on same carrier frequency, user just can listen to the signal strength signal intensity of target BS while being connected with serving BS, therefore only needs to carry out common frequency measurement, and does not need specific Measuring Time (gap) to assist.

Alien frequencies is switched and different systematic evaluation, then needs to adopt different-frequency measure.User, when measuring the signal strength signal intensity of target BS, needs and the carrier frequency synchronization of target BS, can monitoring signal intensity, and user cannot communicate with serving BS at this moment.Can find out, different-frequency measure needs the specific gap that measures to assist.

In the conventional technology, the measurement shown in step 101-103 of Fig. 1 specifically comprises:

1, after user and serving BS connect, serving BS can carry out measurement configuration to user.Described measurement configures mainly to comprise and arranges some measurement parameters, such as measuring object, Measuring Time (gap), measurement report trigger event, measurement report observing time (Ttrig) etc.

Measuring object refers to other frequency or other system, such as frequency 1 (F1) of covering user region, frequency 2 (F2), or WCDMA, GSM etc.

Two kinds of forms are given in measurement gap, 3GPP technical specification.Wherein, the length measuring gap is all set as 6ms, and the repetition period of measuring gap is 40ms and 80ms respectively.In addition, in order to obtain a measurement result more accurately, a measuring object (such as F2) needs could obtain a measured value through unit measurement period (Tunit), and this unit measurement period comprises multiple continuous print and measures gap.That is, user, when distributing measurement gap, is actually and measurement gap is distributed to measuring object use in units of Tunit.Such as, the continuous multiple measurement gap in certain Tunit distribute to same measuring object, and the continuous multiple measurement gap in ensuing Tunit then distribute to another measuring object.Generally, unit measurement period is 480ms, and when the repetition period of measuring gap is 80ms, comprise the measurement gap of 6 6ms in this Tunit, all the other times except measuring gap are still for communicating with base station.

Ttrig is an observation period.If within the whole observation period, certain predefined measurement report trigger event meets always, then, after the observation period terminates, user will send measurement report.The value of Ttrig, between 0 ~ 5s, supposes that the value of Ttrig is decided to be 2.4s here, i.e. 5 480ms.

2, user is after receiving measurement configuration, the signal strength signal intensity of this measuring object is monitored in the unit measurement period of certain measuring object (such as F2), if find that this measuring object meets certain event as event A3 (EventA3), then start timing.

3, when the duration that F2 meets EventA3 more than Ttrig time, user sends measurement report to serving BS, and described measurement report carries about cell information F2 meeting EventA3 (as cell id, signal strength values etc.).

Particularly, EventA3 is defined as a RSRP side-play amount larger than Serving cell of adjacent cell, as shown in inequality (1).

Mn+Ofn+Ocn-Hys>Ms+Ofs+Ocs+Off (1)

Wherein, Mn is the measurement result of adjacent cell, and Ofn is the frequency offset of adjacent frequency, and Ocn is the cell offset amount of adjacent cell, and Hys is a hysteresis index; Ms is the measurement result of Serving cell, and Ofs is the frequency offset of service frequency, and Ocs is the cell offset amount of Serving cell, and Off is event offset amount.In inequality (1), Mn, Ms, Off are three comparatively main parameters.

Specification provides, and when needing when having multiple alien frequencies or different system to measure, measure in turn multiple measuring object, so measuring period is Nobject × 480ms, Nobject is measuring object number.Because multiple measuring object wheel flow measurement, each measuring object will be waited until that other measuring objects measure to be taken turns to after measuring once again and measure.Like this, just there will be following situation.

Situation one

Suppose that certain measuring object (such as F2) in fact can meet EventA3 in the t0 moment, as shown in Figure 3.But according to existing measurement mechanism, t0 moment and ensuing unit measurement period are all used to measure other measuring object, be used for measuring the unit measurement period of F2 until the t1 moment just arrives.That is, user needs to wait until that the t1 moment just finds that F2 meets EventA3, and is that F2 triggers Ttrig timing in the t1 moment, below t0 to t1 this section of time delay is called Ttrig time delay.

During Ttrig, if user records F2 in the unit measurement period distributing to F2 meet EventA3 always, then user sends about F2 meeting the cell information of EventA3 to serving BS after Ttrig terminates, below t0 to t2 this section of time delay is called measurement report (Measurement Report, MR) time delay.MR time delay is made up of Ttrig time delay and Ttrig, if Ttrig is a fixed value, so MR time delay depends primarily on Ttrig time delay.Serving BS, after receiving measurement report, selects target BS, sends switching command to user.

Can see, if do not have Ttrig time delay, user may perform switching in t1+ △ t, and now the channel quality of serving BS is not also poor especially.But because there has been Ttrig time delay, user's time delay performs switching to the t3 moment, now the channel quality of serving BS may the poor stage to having a strong impact on communication quality, even call drop, and the impact that this time delay is brought is in table 2.

Table 2 takes turns time delay and the impact of flow measurement

Situation two

When user monitors out after F2 meets EventA3, trigger Ttrig timing, if the measurement result of the F2 obtained during Ttrig all meets EventA3, then after Ttrig terminates, user sends the measurement report about F2, i.e. MR (F2).Owing to there being multiple measuring object, and multiple measuring object is also tested in turn during Ttrig, as shown in Figure 4, cause user during Ttrig can only distribute a Tunit to measure to certain measuring object (such as F2), and the measurement result in this Tunit is sent to serving BS as measurement report.Obviously, if the situation of change of F2 and service frequency F0 as shown in Figure 5 and Figure 6, just instantaneous shade or decline soon and affect received signal quality, single sampling is the truth being not enough to reflect channel quality, be supplied to the measurement report that serving BS one is wrong possibly, finally make serving BS select a wrong target BS, user accesses a wrong target BS, cause table tennis, instantaneous switching again, even call drop.

Situation three

As shown in Figure 7, also may occur that multiple frequency almost triggers the situation of Ttrig timing simultaneously.In the t1 moment, user monitors F2 and meets EventA3, triggers Ttrig timing, is designated as Ttrig2; As shown in Figure 8, before Ttrig2 does not also terminate, user monitors again F1 and meets EventA3, and trigger Ttrig timing, be designated as Ttrig1, the duration of Ttrig1 with Ttrig2 is identical.Can find out at t2 to t3 during this period of time, have two Ttrig in timing, wherein Ttrig2 for F2, Ttrig1 for F1.After Ttrig2 and Ttrig1 terminates, if F2 and F1 that user monitors meets EventA3 during Ttrig, then user sends measurement report about F2 and F1 respectively to serving BS, and detailed process as shown in Figure 9.

Step 901: after Ttrig2 terminates, user is by the MR about F2, and namely MR (F2), sends to serving BS.

Step 902-903: serving BS carries out switch decision according to MR, selects cell2 (F2) as target BS, and sends handover request to cell2.

Step 904: after Ttrig1 terminates, user is by the MR about F1, and namely MR (F1), sends to serving BS.

If the time interval that MR (F1) and MR (F2) arrive serving BS is long, now serving BS have sent the handover execution command comprising cell2 (F2) to user, and that serving BS will ignore MR (F1).But for various reasons, such as, based on RSRP intensity, community present load, telephone expenses, the available data rate of system etc., advantageously, this user may be more prone to select cell1 (F1) as target BS cell1.But user but could not be switched to optimal target BS, i.e. cell1 (F1), thus affect user satisfaction.

In LTE and LTE-A, because system bandwidth becomes large, increase to maximum 20M, 100M by the maximum bandwidth 10M of 3G.When 20M bandwidth is synthesized by multiple discrete 5M, or when 100M bandwidth is synthesized by multiple discrete 20M bandwidth, certain user a moment can only on 5M or 20M transceiving data, and can not in whole 20M or 100M bandwidth transceiving data.Like this, the adjacent cell of alien frequencies (Inter Frequency, inter-F) is by ubiquity.Meanwhile, future mobile communication system is also the multi-address access network that a multiple wireless access technology coexists, and adopts the adjacent cell of different access technology (Inter Radio Access Technology, inter-RAT) also by ubiquity.In order to reach the load balancing between inter-F, inter-RAT system, and ensure that always all best with one community of user is connected, the switching of inter-F and inter-RAT is extremely important, therefore for ensureing that the measurement of quality of handoff also becomes more important.Accordingly, how process multiple measuring object in different-frequency measure better to measure the problem brought in turn and just seem particularly important.

Summary of the invention

In view of this, the invention provides the method and apparatus of handover measurement in a kind of mobile communication, concrete realization is as follows:

A method for handover measurement in mobile communication, comprising:

User terminal determines the first object set comprising one or more measuring object, multiple unit measurement period Tunit is distributed in turn each measuring object in the first object set;

Described user terminal is removed one or more measuring object and is obtained the second object set and the corresponding relation resetting measuring object in all units measurement period and described second object set from described first object set;

According to the corresponding relation of the measuring object reset in rear unit measurement period and described second object set, the signal strength signal intensity of each measuring object in second object set described in described user terminal measurement, and send measurement report according to the monitoring situation of measurement report trigger event.

Describedly from described first object set, remove one or more measuring object comprise:

Object is set and removes trigger event;

At least one the unit measurement period of measuring object in described first object set monitors after described object removes trigger event, stops in follow-up multiple units measurement period of described measuring object the signal strength signal intensity measuring this measuring object.

Described object removes trigger event: Mm+Ofm+Ocm+Hys<Mn+Ofn+Ocn-Off,

Wherein, M is the measurement result of measuring object, and Of is the frequency offset of measuring object, and Oc is the cell offset amount of measuring object, and Hys is hysteresis index, and Off is event offset amount;

Subscript n represents the measuring object in the first object set with best signal strength, and subscript m represents a measuring object in the first object set;

At least one unit measurement period of described measuring object in described first object set monitors described object removal trigger event and comprises:

The best signal strength that all measuring objects in the signal strength signal intensity obtained in described unit measurement period by this measuring object and the first object set have compares, if the little side-play amount of the signal intensity ratio best signal strength of this measuring object, be then defined as monitoring object and remove trigger event.

Described object removes trigger event: Mm+Ofm+Ocm+Hys<Ms+Ofs+Ocs-Off,

Subscript s represents serving BS, and subscript m represents a measuring object in the first object set;

The signal strength signal intensity obtained in described unit measurement period by this measuring object and the signal strength signal intensity of serving BS compare, if the little side-play amount of the signal strength signal intensity of the signal intensity ratio serving BS of this measuring object, be then defined as monitoring object and remove trigger event.

Described object removes trigger event: Mm+Hys<Threshold, and wherein M is the measurement result of measuring object, and Hys is hysteresis index, and Threshold is threshold value, and subscript m represents a measuring object in the first object set;

The signal strength signal intensity that this measuring object obtains in described unit measurement period is compared with the threshold value preset, if the signal strength signal intensity of this measuring object is less than described threshold value, is then defined as monitoring object and removes trigger event.

The method comprises further:

Object is set and removes observing time, and after monitoring described object removal trigger event, start this object for measuring object to be removed and remove observing time, and all units measurement period distributing to this measuring object to be removed in observing time is removed to described object monitor;

If described object can be monitored in described all units measurement period remove trigger event, after described object is removed and terminated observing time, stop measuring described measuring object to be removed, described measuring object to be removed is become and removes measuring object.

The described corresponding relation resetting measuring object in all units measurement period and described second object set comprises:

Follow-up all units measurement period is distributed in turn each measuring object in described second object set.

The maximum measuring object of signal strength signal intensity is searched from described second object set;

The described multiple units measurement period having removed measuring object is distributed to the maximum measuring object of described signal strength signal intensity.

The described monitoring situation according to measurement report trigger event sends measurement report and comprises:

After monitoring measurement report trigger event for the first measuring object, for described first measuring object starts the first measurement report Ttrig observing time of serving BS setting, and all units measurement period distributing to this first measuring object in described Ttrig is monitored;

If measurement period can monitor described measurement report trigger event in described all units, after described Ttrig terminates, send measurement report for described first measuring object.

Arrange the second measurement report Ttrig' observing time, described Ttrig'=Ttrig+ (Nskip/2) * Tunit, wherein Ttrig is first measurement report observing time that serving BS is arranged, and Nskip is the measuring object number removed;

After monitoring measurement report trigger event for the first measuring object, for described first measuring object starts described Ttrig', and all units measurement period distributing to this first measuring object in described Ttrig' is monitored;

If measurement period can monitor described measurement report trigger event in described all units, after described Ttrig' terminates, send measurement report for described first measuring object.

3rd measurement report Ttrig observing time is set "; described Ttrig "=T1-mod (T1, Nkeep*Tunit), wherein T1 is the first measurement report Ttrig observing time or the second measurement report Ttrig' observing time, Nkeep is the measuring object number of the second object set;

The all units measurement period distributing to this measuring object in ", and to described Ttrig " after monitoring measurement report trigger event for the first measuring object, for described first measuring object starts described Ttrig is monitored;

" after terminating, measurement report is sent for described first measuring object if measurement period can monitor described measurement report trigger event in described all units, at described Ttrig.

The method comprises further: when the recover condition determining to preset meets, recover the measurement to the signal strength signal intensity removing measuring object.

The described recover condition determining to preset is satisfied to be comprised:

Remove measuring object from described first object set after, start the timing to the time of removal, and after the removal time terminates, judge currently whether be in one or more measurement report observing time, if be not in any measurement report observing time, then determine that the recover condition preset meets; Or

After all measurement reports terminates observing time, determine that the recover condition preset meets; Or

When the signal strength signal intensity of the measuring object in the second object set is deteriorated, remove measuring object from one or more the second measuring object chosen and there is best signal strength, and determined that the recover condition for this second measuring object meets.

Describedly determine that the first object set comprising one or more measuring object comprises:

Receive the measurement configuration that serving BS provides, measure one or more measuring object of specifying in configuration according to described, determine described first object set.

Describedly determine that the first object set comprising one or more measuring object comprises: user terminal is searched for different carrier frequency or access way, using the carrier frequency that detects or access way as measuring object, be increased in the first object set.

User terminal receives the measurement configuration that serving BS provides, and searches for different carrier frequency or access way;

According to the measuring object that the measuring object of specifying in measurement configuration and user terminal search, determine described first object set.

Measuring object in described first object set is different with the carrier frequency that serving BS uses, or measuring object in described first object set is different with the access way that serving BS uses.

A kind of user terminal, comprising:

Parameter storage unit, for preserving the first object set comprising one or more measuring object, and for preserving the corresponding relation of measuring object and unit measurement period Tunit;

Measure performance element, corresponding relation for the measuring object preserved according to described parameter storage unit and unit measurement period measures the signal strength signal intensity of each measuring object, and measurement result is sent to object control unit, and send measurement report according to the monitoring situation of measurement report trigger event;

Object control unit, for arranging the corresponding relation of measuring object and unit measurement period, and according to the measurement result that described measurement performance element obtains, from described first object set, remove one or more measuring object obtain the second object set, reset the corresponding relation of measuring object in all units measurement period and described second object set, according to the corresponding relation resetting result renewal measuring object and unit measurement period.

Described object control unit comprises:

Removing definition module, removing trigger event for arranging object;

Object removes module, monitor after described object removes trigger event at least one the unit measurement period of the measuring object in described first object set, stop in follow-up multiple units measurement period of described measuring object the signal strength signal intensity measuring this measuring object.

Described object is removed module and is used for: arrange object and remove observing time, after monitoring described object removal trigger event, start this object for measuring object to be removed and remove observing time, and all units measurement period distributing to this measuring object to be removed in observing time is removed to described object monitor; If described object can be monitored in described all units measurement period remove trigger event, after described object is removed and terminated observing time, stop measuring described measuring object to be removed, described measuring object to be removed is become and removes measuring object.

Described object control unit comprises further:

Tunit distribution module, for distributing to each measuring object in described second object set in turn by follow-up all units measurement period.

Described object control unit comprises further:

Tunit distribution module, for searching the maximum measuring object of signal strength signal intensity from described second object set, distributes to the maximum measuring object of described signal strength signal intensity by the described multiple units measurement period having removed measuring object.

Described object control unit comprises further: object recovers module, during for meeting at the recover condition determining to preset, recovers the measurement to the signal strength signal intensity removing measuring object.

The measurement configuration that described parameter storage unit provides for preserving serving BS, described measurement is configured for first object set of specifying and comprising one or more measuring object.

Described measurement performance element is further used for searching for different carrier frequency or access way, and using the carrier frequency that detects or access way as measuring object, is increased in the first object set that described parameter storage unit preserves.

As seen from the above technical solution, the method and apparatus of this handover measurement of the present invention, when needing when there being multiple measuring object to measure, for situations such as different frequency/different systems, trigger event is removed by arranging object, the measuring object that temporary transient removal signal strength signal intensity is poor, and the unit measurement period removing object is distributed to the good measuring object of signal strength signal intensity, thus the monitoring increased the good measuring object of signal strength signal intensity and measuring frequency.

Further, embodiments of the invention carry out adaptive updates to Ttrig, and namely the length of Ttrig can according to total measuring object number and the adaptive change of uncared-for measuring object number.Further, if Ttrig remaining time can not the measuring object of this Ttrig of measurement triggering again time, measurement report will be sent in advance, thus reduce measurement report time delay.Like this, accuracy and the promptness of measurement result can be ensured largely, improve the speech quality of reliability and the Cell Edge User switched.

Accompanying drawing explanation

Fig. 1 is the flow chart switched in conventional method.

Fig. 2 is the structural representation of the multi-layer Overlay Network that multiple wireless access way coexists.

Fig. 3 is for sending measurement report and the schematic diagram carrying out switching according to the variations of Target cell (F2) and Serving cell (F0).

Fig. 4 is the schematic diagram that in conventional method, multiple measuring object carries out taking turns flow measurement.

Fig. 5 be the variations of measuring object F2 and the service frequency F0 affected by shade compare schematic diagram.

Fig. 6 be the variations of measuring object F2 and the service frequency F0 affected by decline soon compare schematic diagram.

Fig. 7 is the schematic diagram that multiple measuring object almost triggers Ttrig timing simultaneously.

Fig. 8 is the schematic diagram that in conventional method, multiple measuring object almost sends measurement report simultaneously to serving BS.

Fig. 9 is the transmission flow figure of multiple measurement report.

Figure 10 is the method flow diagram of the handover measurement of different frequency/different system in the present invention.

Figure 11 is the method flow diagram that in one embodiment of the invention, user removes the poor measuring object of signal strength signal intensity.

Figure 12 is the method flow diagram that in one embodiment of the invention, user upgrades Ttrig.

Figure 13 is the schematic diagram upgrading Ttrig in one embodiment of the invention.

Figure 14 is the measuring sequence figure triggering traditional Ttrig timing after removing differential measurement object in one embodiment of the invention.

Figure 15 is the structure drawing of device for handover measurement in the present invention.

Figure 16 is the structure drawing of device removing trigger event in one embodiment of the invention for arranging object.

Figure 17 is for removing the poor measuring object of signal strength signal intensity and recovering the structure drawing of device of this measuring object in one embodiment of the invention.

Figure 18 is for upgrading the structure drawing of device of Ttrig in one embodiment of the invention.

Figure 19 is the comparison schematic diagram adopting the switching stability of Ttrig after upgrading and the switching stability of conventional method in the present invention's instantiation.

Figure 20 is the comparison schematic diagram adopting the measurement report time delay of traditional Ttrig and the measurement report time delay of conventional method after removing measuring object in the present invention's instantiation.

Figure 21 is the comparison schematic diagram of transmission time interval in the transmission time interval of the measurement report of two different measuring objects in the present invention's instantiation and conventional method.

Embodiment

For making object of the present invention, technical scheme and advantage clearly understand, to develop simultaneously embodiment referring to accompanying drawing, the present invention is described in more detail.

The embodiment provides a kind of method of carrying out the measurement of different frequency/different systematic evaluation at user terminal, comprise: user terminal determines to comprise the first object set of one or more measuring object, multiple unit measurement period Tunit is distributed in turn each measuring object in the first object set.

Wherein, user terminal determines that the concrete mode of the first object set can be the measurement configuration that reception serving BS provides, first object set of specifying is obtained from this measurement configuration, also can be by user terminal, different carrier frequency or access way are searched for, using the carrier frequency that detects or access way as measuring object, finally form the first object set.

Then, user terminal, according to the signal strength measurement situation to the measuring object in the first object set, is removed one or more measuring object and is obtained the second object set, and reallocates to the unit measurement period removing measuring object.

That is, no longer take unit measurement period owing to removing measuring object, the unit measurement period that these free time get off can be reallocated to one or more measuring object use in the second object set.Such as, if the unit measurement period that these free time get off wants uniform distribution to use to all measuring objects in the second object set, just need to re-start adjustment to the corresponding relation of original setting is whole.If only the unit measurement period that these free time get off is distributed to the measuring object in the second object set with maximum signal, the unit measurement period originally distributing to other measuring object can be readjusted.

Finally, measure the signal strength signal intensity of each measuring object in described second object set, the monitoring situation according to measurement report trigger event sends measurement report.Wherein, removed measuring object is generally the poor measuring object of signal quality.

Wherein, measure the first object set being configured for and specifying and comprise one or more measuring object, and also can Measuring Time be set in measurement configuration.That is, what a or multiple Measuring Time serving BS divide in advance, these Measuring Time are distributed to each measuring object in the first object set by user in turn according to unit measurement period (Tunit), namely arranged the corresponding relation of Tunit and measuring object by user.

Figure 10 is the method flow diagram of handover measurement in the present invention, comprising:

Step 1001: receive the measurement configuration that serving BS provides, know the measuring object measured and specify in configuration.In embodiments of the invention, the set of these measuring objects is called the first object set.

Step 1002: user, in measuring process, according to certain rule, removes the poor measuring object of one or more signal quality, obtains the second object set from above-mentioned first object set.

In step 1002, the operation of removing the poor measuring object of one or more signal quality is removed trigger event (EventC) by object and is triggered.That is, in the unit measurement period distributing to certain measuring object, if detect that the signal strength signal intensity of this measuring object meets EventC, can directly this measuring object be removed.Generally, be that the measuring object with poor signal intensity is removed.

When embody rule, object removes trigger event (EventC) can multiple implementation, is below illustrated for three examples.It is pointed out that owing to having defined measurement report trigger event A1-A5, B1-B2 in TS 36.331, so object to be removed three kinds of specific implementation called after EventC1-3 of trigger event (EventC).In following definitions, suppose that the signal strength signal intensity of measuring object F3 is poor, the signal strength signal intensity of measuring object F2 is best.

(1) EventC1: a differential measurement object F3 side-play amount poorer than best measuring object F2, as shown in inequality (2).

M3+Of3+Oc3+Hys<M2+Of2+Oc2-Off (2)

Arrange EventC1 to consider: for F2, the signal strength signal intensity of F3 is poor.Therefore, even if the large side-play amount of the signal intensity ratio service frequency F0 of F3, target BS can be chosen as, after but user is switched to F3, the large side-play amount of signal intensity ratio F3 due to F2, this user can be switched to F2 from F3 again at once, and so frequent switching can affect the speech quality of user.Therefore, F3 is removed from the first object set, the efficiency of measurement can be improved.Further, by arranging TtrigC and side-play amount Off, can ensure that the signal strength signal intensity of F3 is greater than the possibility of the signal strength signal intensity of F2 within the removal time (Tskip) very low, making the accuracy measured also secure.

More generally, inequality (2) can be expressed as:

Mm+Ofm+Ocm+Hys<Mn+Ofn+Ocn-Off

Wherein, subscript m represents certain measuring object in the first object set, and n represents the measuring object in the first object set with best signal strength.

(2) EventC2: a differential measurement object side-play amount poorer than service frequency, as shown in inequality (3).

M3+Of3+Oc3+Hys<Ms+Ofs+Ocs-Off (3)

(3) EventC3: differential measurement object lower than an absolute thresholding, as shown in inequality (4).

M3+Hys<Threshold (4)

For EventC2 and EventC3, increased to that to meet the possibility becoming target BS very low by the signal strength signal intensity arranging TtrigC and side-play amount Off, F3 within the time of removal (Tskip), in Tskip, therefore ignore that F3 do not measure is rational.

In addition, can remove trigger event arrange one period of observation period for object, namely object removes observing time (TtrigC), and its effect is similar with Ttrig, and only Ttrig is the observation period arranged for measurement report trigger event.In the unit measurement period distributing to certain measuring object, if detect that the signal strength signal intensity of this measuring object meets EventC, then this unit measurement period is removed observing time the starting point of (TtrigC) as object, and the unit measurement period belonging to this measuring object in TtrigC proceeds to detect, if the signal strength signal intensity of this measuring object all unit measurement period distributing to this measuring object in TtrigC all meet EventC, then after TtrigC terminates, this measuring object is removed.Particularly, TtrigC can be arranged for these three events of EventC1-3, and any one namely in these three events must be all satisfied during TtrigC, just can carry out object and remove operation, be ignored by this differential measurement object.

Further, can determine to remove several differential measurement object according to minimum measuring object number (Nmin).Wherein, Nmin is used to specify the number at least needing the measured object retained, and such as at least retains 2 measuring objects.

Step 1003: the unit measurement period removing measuring object is reallocated.

Differential measurement object is meeting object removal trigger event and after TtrigC timing is removed, can also consider how to utilize the unit measurement period having removed object according to different situations.In instantiation of the present invention, provide following three kinds of modes:

1, the Tunit removing measuring object is distributed to service frequency F0, be used for carrying out uplink and downlink communication with base station, thus improve the communication quality of user.Be specially: user sends a up signaling to serving BS, and advertise service base station user also rests on service frequency at these Tunit, require that serving BS continues to send, receive the related data of this user.This scheme can improve the throughput of user.

2, user is removing the unit measurement period of measuring object (comprising multiple measurement gap) dormancy.This scheme can power saving, without any need for extra operation, saves the power consumption of mobile terminal.

3, user resets the corresponding relation of measuring object in all units measurement period and the second object set.This scheme does not need extra signaling traffic load.

When the corresponding relation of set-up mode 3, there are following two kinds of specific implementations:

(1) the measuring object number comprised according to the second object set redistributes Tunit, uses the Tunit redistributed to measure the measuring object in the second object set.

Suppose that the measuring object that serving BS is specified is F1-F4, unit measurement period be numbered Tunit1, Tunit2, Tunit3, Tunit4, Tunit5, Tunit6 ... all Tunit take turns flow assignment in the first object set, and the unit measurement period namely originally distributing to F1 is Tunit1, Tunit5, Tunit9 ...After removing F2, all Tunit again take turns flow assignment in the second object set, then the unit measurement period distributing to F1 is Tunit1, Tunit4, Tunit7 ...Wherein, each Tunit is the set of multiple measurement gap.

(2) the unit measurement period removing measuring object is distributed to the good measuring object of signal strength signal intensity in the second object set, strengthen the measurement dynamics to the good measuring object of signal strength signal intensity.

For (2) this situation, if opened without any Ttrig, reallocation can strengthen the monitoring frequency of better measuring object, triggers Ttrig in time, thus sends measurement report in time.If there has been Ttrig to open, unit measurement period is distributed to the good measuring object of signal, the measured increased frequency of better measuring object during can Ttrig being made, ensured the accuracy of measurement result.

Step 1004: measure all measuring objects in the second object set, obtains measurement result, and sends measurement report according to the monitoring situation of measurement report trigger event.

Step 1005: for removing measuring object, can according to the recover condition preset, recover the measurement to its signal strength signal intensity, make to measure the actual signal situation of more anastomotic network, such as avoid certain signal strength signal intensity having removed measuring object to improve but because be left in the basket and bring Ttrig time delay.

During specific implementation, following three kinds of modes can be adopted, the recover condition having removed measuring object is set.

1, after all Ttrig terminate, the measurement to removing measuring object is recovered.

2, when the better measuring object retained has one to be deteriorated suddenly, determine that a signal strength signal intensity is good from multiple removal measuring object, recover the measurement to this measuring object.

The removal time (Tskip) 3, being set, after Tskip terminates, if do not open Ttrig for any measuring object, then recovering the measurement to removing measuring object.For EventC1, EventC2, EventC3, the value of Tskip can separate configurations.

Can find out, the step 1001 of Figure 10 receives the measurement configuration that serving BS provides to obtain the first object set for example.During specific implementation, also can search for measuring object by user terminal oneself and form the first object set.Such as, user terminal can be searched for all frequencies that can access when starting shooting, to select a suitable community access, and the frequency searched or access way is recorded and is increased to the first object set.For another example, user terminal, after the community that access is suitable, can read the broadcast message of this community, obtain the information that some rise to the measuring object of the first object set, comprise the information of the measuring object such as alien frequencies, different system from broadcast message.And for example, user terminal, when idle state, also can be searched for different measuring objects, and this search can be also can be periodically that event triggers.And for example, user, after proceeding to connected state, also can utilize measurement gap to search for measuring objects such as new alien frequencies, different systems, and this search can be also can be periodically that event triggers.It is pointed out that user terminal once search new measuring object, just can be increased in the first object set.

For base station configuration and these two kinds of modes of user search, the first object set can be constantly update.When base station configures, base station can change measuring object at any time, and user terminal passes through measurement config update first object set receiving base station under connected state.In addition, these two kinds of modes can be combined, and the measuring object that such as can search according to the measuring object of specifying in measurement configuration and user terminal, determines the first object set.

Step 1101: user terminal, after the measurement configuration receiving serving BS, starts to measure measuring object.If serving BS is configured with EventC, user performs according to configuration; Otherwise user terminal arranges object according to the measurement result of a period of time voluntarily and removes trigger event (EventC), and the parameters such as the minimum measuring object number (Nmin) needing to retain are set.

Step 1102: the measuring object number (Nobject) and the Nmin that compare configuration, if Nobject>Nmin, performs step 1103.Otherwise do not carry out object removal, this flow process terminates.

Step 1103: whether user meets EventC in the signal strength signal intensity of the measuring object of each unit measurement period monitoring correspondence, if certain measuring object meets EventC, performs step 1104, otherwise repeated execution of steps 1103.

Step 1104: user is this measuring object unlatching TtrigC timing.

Step 1105: during TtrigC timing, continues, to multiple measuring object wheel flow measurement, if the measurement result of measuring object in the Tunit distributing to it triggering TtrigC meets EventC always, after TtrigC terminates, to perform step 1106.Otherwise this flow process terminates.

Step 1106: user removes this measuring object, namely no longer measures this measuring object during ensuing Tskip.

Further, after one or more measuring object of removal, the Ttrig time delay of saving can be utilized to upgrade the measurement report observing time (Ttrig) that base station configures, and the measurement report observing time (Tx) obtaining user's setting is kept on this user terminal.

Supposing that serving BS configures to the measuring object number of user is Nobject, and the measuring object number removing signal strength signal intensity poor is Nskip, and the good measuring object number of signal strength signal intensity of reservation is Nkeep.For a removed Nskip measuring object, its follow-up all Tunit is distributed in turn Nkeep measuring object in the second object set.In this case, when measuring object number is N, average Ttrig time delay is as shown in formula (5):

Ttrigdelay＝{(N-1)/2}*Tunit(5)

Further, the Ttrig time delay of saving owing to removing differential measurement object is as shown in formula (6):

δTtrigdelay＝(Nskip/2)*Tunit (6)

Therefore, Ttrig can be updated to Ttrig', as shown in formula (7):

Ttrig'＝Ttrig+(Nskip/2)*Tunit (7)

In addition, when the number of the Tunit comprised in Ttrig is not the integral multiple of measuring object, the measurement of a bit of time before Ttrig cut-off does not have help to the measuring object triggering Ttrig.Therefore, this short time can be skipped, thus send measurement report in advance.Particularly, if Ttrig' is the multiple of Nkeep*Tunit, then what Ttrig' cut-off last Tunit front measured is exactly the measuring object triggering Ttrig, useful to this measurement report, so measurement report sends after will waiting until Ttrig' cut-off; If Ttrig' is not the multiple of Nkeep*Tunit, then before Ttrig' cut-off, the measurement result of last even multiple Tunit is not the measuring object of measurement triggering Ttrig, measurement report is not had any effect, now Ttrig can be updated to Ttrig further "; as shown in formula (8), to send measurement report in advance.

Ttrig″＝Ttrig'-mod(Ttrig',Nkeep*Tunit) (8)

Wherein, Tunit is the duration of a measurement measuring object required time, and general value is 480ms.

Table 3 illustrates when serving BS configures 5 measuring objects, the updated value of Ttrig when Nkeep is respectively 2,3,4.Wherein, represent that the parameter value of time is multiplied by 480ms for showing intermediate value.

Table 3 couple Ttrig carries out Ttrig' and Ttrig " upgrades the effect brought

As can be seen from Table 3, the length utilizing formula (7) to be used for the Ttrig time delay of saving to increase Ttrig obtains Ttrig', carries out observing the pendulous frequency adding measuring object during Ttrig', thus improves the accuracy of measurement result.Then, utilize formula (8) to optimize further Ttrig', measurement report time delay can be reduced to a certain extent.If will better reduce measurement report time delay, the Ttrig time delay of saving can not be used for increasing the length of Ttrig.Like this, when reducing measuring object number, just can find EventA3 in advance, and using traditional Ttrig to carry out measurement report observation.

Certainly, even if for traditional Ttrig, also the renewal can carried out as shown in formula (9) obtains Ttrig " ', this renewal and formula (8) similar.Table 4 illustrates and adopts traditional Ttrig only to utilize formula (9) to carry out the effect of Ttrig renewal.

Ttrig″'＝Ttrig-mod(Ttrig,Nkeep*Tunit) (9)

Table 4 couple Ttrig carries out Ttrig " ' upgrade the effect brought

In table 3 and table 4, tested number of times can the accuracy of reflected measurement result, and pendulous frequency is more, and measurement result is more accurate.What MR time delay embodied is switch the time of postponing, and measurement report time delay is larger, switches more late, the more possible call drop of user.In table 3, MR time delay is Ttrig time delay and Ttrig " and; In table 4, MR time delay is Ttrig time delay and Ttrig " ' sum.

Contrast table 3 and table 4, when removing measuring object, increasing Ttrig with the time saved and can obtain measurement result more accurately, and using traditional Ttrig can obtain shorter measurement report time delay.Can find out, the time delay of measurement report and accuracy can not obtain simultaneously, and the method for table 3 is the accuracys in order to improve measurement report to a greater degree, and just only has less minimizing to measurement report time delay.What table 4 was larger decreases measurement report time delay, but does not improve the accuracy of measurement report.

Further, even without minimizing measuring object number, still the renewal shown in formula (9) can be similar to traditional Ttrig.Now, only Nkeep need be changed into Nobject, i.e. Ttrig " "=Ttrig-mod (Ttrig, Nobject*Tunit).

Can find out, the measurement report observing time (Tx) that user is arranged directly can get Ttrig, also can get the value after upgrading Ttrig, such as Ttrig', Ttrig ", Ttrig " ', Ttrig " " etc.

Figure 12 is that in one embodiment of the invention, user upgrades Ttrig to Ttrig' or Ttrig " method flow diagram.

Step 1201: user detects that in measuring process the signal strength signal intensity of certain measuring object meets the condition becoming target BS, as EventA3, then perform step 1202, otherwise this flow process terminates.

Step 1202: judge whether the measuring object number (Nobject) that base station configures is greater than the current measuring object number (Nkeep) of user, if be greater than, performs step 1204; Otherwise perform step 1203.

Step 1203:Ttrig remains unchanged, and this flow process terminates.

Step 1204: calculate the Ttrig time delay of saving because removing one or more measuring object according to formula (6).

Step 1205: according to formula (7), Ttrig is updated to Ttrig '.

Step 1206: judge that whether Ttrig ' is the multiple of Nkeep*Tunit.If so, step 1207 is performed; If not, perform step 1208.

Step 1207:Ttrig ' remains unchanged, and this flow process terminates.

Step 1208: according to formula (8), Ttrig ' is updated to Ttrig ", this flow process terminates.

It should be noted that, this flow performing can terminate to step 1205, and step 1206-1208 is for optionally to perform step.

Figure 13 is the schematic diagram upgrading Ttrig value in one embodiment of the invention, Ttrig ' shown in it and Ttrig ".In fig. 13, Ttrig ' is 2.4s, comprises 5 Tunit, and currently has 3 measuring objects: F1, F2, F3.So, the 4th, 5 Tunit is unhelpful to the measuring object triggering Ttrig, so use formula (8) that Ttrig is updated to Ttrig " (i.e. 3 Tunit), measurement report can be sent in advance.

Figure 14 is the instrumentation plan triggering traditional Ttrig timing after removing differential measurement object in one embodiment of the invention.Suppose that the signal strength signal intensity of F3 is the poorest, after being removed, measuring object is remaining F1 and F2 only.Like this, if F2 has met measurement report trigger event, at most also only need to wait F1 measure after just can be monitored, decrease and trigger the time delay of Ttrig, thus the promptness of guarantee measurement result.And during traditional Ttrig, the monitoring number of times of F2 also increases to 2 times by original 1 time, increases the monitoring frequency of this frequency, ensure the accuracy of measurement result.Can find out, due to the minimizing of measuring object, the interval time of advent of two measurement results decreases, and is conducive to serving BS and selects most suitable target BS.

With method of the present invention accordingly, present invention also offers the device for carrying out the handover measurement shown in Figure 10.Figure 15 is the structure drawing of device for handover measurement in the present invention, comprising:

Parameter storage unit 1501, for preserving the first object set comprising one or more measuring object, and for preserving the corresponding relation of measuring object and unit measurement period Tunit.

Particularly, the measurement that parameter storage unit 1501 may be used for preserving serving BS and provides configures, and described measurement is configured for first object set of specifying and comprising one or more measuring object.

Measure performance element 1502, corresponding relation for the measuring object preserved according to described parameter storage unit and unit measurement period measures the signal strength signal intensity of each measuring object, and measurement result is sent to object control unit 1503, and send measurement report according to the monitoring situation of measurement report trigger event.

Further, measuring performance element 1502 for searching for different carrier frequency or access way, and using the carrier frequency that detects or access way as measuring object, being increased in the first object set that described parameter storage unit 1501 preserves.Now, the first object set preserved in parameter storage unit 1501 is that user terminal oneself searches.

Or the first object set that parameter storage unit 1501 is preserved both can comprise the measuring object of base station configuration, also can comprise the measuring object that terminal searching arrives.

Object control unit 1503, for arranging the corresponding relation of measuring object and unit measurement period, and according to the measurement result that described measurement performance element obtains, from described first object set, remove one or more measuring object obtain the second object set, the unit measurement period removing measuring object is reallocated, upgrades the corresponding relation of measuring object and unit measurement period according to reallocation result.

Particularly, can also arrange in object control unit 1503: remove definition module 1513 and object removal module 1523.Wherein, remove definition module 1513, removing trigger event for arranging object, being saved in parameter storage unit 1501.Object removes module 1523, monitor after described object removes trigger event at least one the unit measurement period of the measuring object in described first object set, stop in follow-up multiple units measurement period of described measuring object the signal strength signal intensity measuring this measuring object.

Particularly, object remove module 1523 for: arrange object remove observing time (TtrigC), after monitoring object removal trigger event, start this TtrigC for certain measuring object to be removed, and all units measurement period distributing to this measuring object to be removed in TtrigC is monitored.Further, if object removes module 1523 can monitor described object removal trigger event in described all units measurement period, after TtrigC terminates, stop measuring described measuring object to be removed, described measuring object to be removed is become and removes measuring object.

Further, can also arrange in object control unit 1503: Tunit distribution module 1533, for the follow-up all units measurement period removing measuring object being distributed in turn each measuring object in the second object set; Or, for searching the maximum measuring object of signal strength signal intensity from the second object set, the described follow-up multiple units measurement period having removed measuring object is distributed to the maximum measuring object of described signal strength signal intensity, and the corresponding relation of the measuring object after renewal and unit measurement period is saved in parameter storage unit 1501.

Further, can also arrange in object control unit 1503: object recovers module 1543, during for meeting at the recover condition determining to preset, recovers the measurement to the signal strength signal intensity removing measuring object.

Can find out, the corresponding relation of measuring object and unit measurement period constantly updates.Meet once object removes trigger event, just have measuring object and be removed.Correspondingly, the corresponding relation of measuring object and unit measurement period will adjust, and such as the unit measurement period being removed measuring object is reallocated to use to other measuring object.Corresponding relation after renewal is kept at parameter storage unit 1501, measures performance element 1502 when performing measurement, just can measure the signal strength signal intensity of certain measuring object in corresponding unit measurement period according to the corresponding relation after renewal.

Further, removing trigger event to arrange object, The embodiment provides a kind of user terminal.Figure 16 is the structure chart removing the user terminal of trigger event in one embodiment of the invention for arranging object.This user terminal comprises: parameter storage unit 1601, measurement performance element 1602, event definition unit 1603, event evaluation unit 1604.

Parameter storage unit 1601, for storing the measurement parameter of base station configuration, object that event definition unit 1603 provides removes trigger event (EventC) and EventC parameter, and the measuring object of event evaluation unit 1604 setting and the corresponding relation of unit measurement period.

Wherein, the detection case according to EventC upgrades by the corresponding relation of measuring object and unit measurement period.

At the beginning of measurement, what preserve in parameter storage unit 1601 is the corresponding relation of all measuring objects in unit measurement period and the first object set.Wherein, the measuring object in the first object set is configured by base station.

After one or more object is removed, the corresponding relation of all measuring objects that the corresponding relation of measuring object and unit measurement period will be updated in unit measurement period and the second object set.Particularly, remove one or more measuring object from the first object set after, obtain the second object set.

Measure performance element 1602, for the corresponding relation according to the measuring object preserved in parameter storage unit 1601 and unit measurement period, be that corresponding measuring object is measured in each unit measurement period, measurement result be sent to event definition unit 1603 and event evaluation unit 1604.

Event definition unit 1603, removes trigger event for defining objects, and arranges EventC parameter according to the measurement result of a period of time, be sent to parameter storage unit 1601.The function class of the removal definition module 1513 in this event definition unit 1603 and Figure 15 seemingly.

During specific implementation, EventC can be defined as EventC1 by event definition unit 1603, or is defined as EventC2, or is defined as EventC3.If adopt EventC1 to remove trigger event as object, then need the best measuring object n determined further within this period.The EventC parameter corresponding with EventC1 comprises: preferably cell offset amount Ocn, the hysteresis index Hys, event offset amount Off etc. of frequency offset Ofn, preferably the measuring object n of measurement result Mn, preferably the measuring object n of measuring object n.

In addition, also can configure EventC and EventC parameter by base station and be supplied to user terminal, user terminal performs object according to the configuration of base station and removes.In this case, user terminal also can arrange event definition unit 1603.

Event evaluation unit 1604, for the corresponding relation of initial setting up measuring object and unit measurement period, and remove trigger event according to the object that parameter storage unit 1601 is preserved, the measurement result of measuring object is assessed, if meet certain object to remove trigger event, then the measuring object preserved in undated parameter memory cell 1601 and the corresponding relation of unit measurement period.The basic function that object in this event evaluation unit 1604 and Figure 15 removes module 1523 is similar.

During specific implementation, described renewal comprises: deleted from the first object set by this measuring object, and the unit measurement period of this measuring object is reallocated, the corresponding relation of the measuring object obtained after reallocation and unit measurement period is saved in parameter storage unit 1601.

Further, Figure 17 is for removing the poor measuring object of signal strength signal intensity and recovering the structure drawing of device of this measuring object in one embodiment of the invention.This device comprises: parameter storage unit 1701, measurement performance element 1702, event evaluation unit 1704, removal object timing unit 1705.

Parameter storage unit 1701, removes trigger event (EventC) for the measurement parameter and object storing base station configuration, and removes according to the notice removing object timing unit 1705 or recover one or more measuring object of base station configuration.

Measure performance element 1702, measure for the measurement parameter preserved according to parameter storage unit 1701, and measurement result is sent to event evaluation unit 1704.

Event evaluation unit 1704, for the setting according to EventC in parameter storage unit 1701, assesses the measurement result carrying out measurement performance element 1702, if meet EventC, notifies to remove object timing unit 1705.Further, event evaluation unit 1704 is for judging whether certain measuring object all meets EventC during TtrigC, and if it is notice removes object timing unit 1705.

Remove object timing unit 1705, for receiving the notice from event evaluation unit 1704, TtrigC timing is started for certain measuring object, and after TtrigC timing terminates, notifying parameters memory cell 1701 removes this measuring object, the corresponding relation of measuring object and unit measurement period in undated parameter memory cell 1701.In corresponding relation in the updated, unit measurement period no longer distributes to removed measuring object.

Further, remove object timing unit 1705 also for after certain measuring object of removal, Tskip timing is started for this measuring object, and after Tskip timing terminates, or when event evaluation unit 1704 judges that the condition that other recovers this measuring object meets, notifying parameters memory cell 1701 recovers this measuring object, is reassigned to the measuring object be resumed by unit measurement period.

In embody rule, remove object timing unit 1705 and one or more timer can be adopted to realize.

Further, Figure 18 is for upgrading the structure drawing of device of Ttrig in one embodiment of the invention.This device comprises: parameter storage unit 1801, measure performance element 1802, event evaluation unit 1804, observing time updating block 1806.Wherein:

Parameter storage unit 1801, for preserving measurement configuration (such as measuring object number N object etc.) that serving BS provides, and preserves the measurement report observing time (Tx) of user's setting.Time initial, the value of Tx is Ttrig.

Measure performance element 1802, for the measurement configuration that the memory cell 1801 that gets parms is preserved, the signal strength signal intensity of measuring object and service frequency is measured, and measurement result is issued event evaluation unit 1804.

Event evaluation unit 1804, for the measurement result provided according to measurement performance element 1802, and the object removal trigger event that parameter storage unit 1801 provides judges, if determine that the measurement result of certain measuring object meets this object and removes trigger event, then notice updating block observing time 1806.

Observing time updating block 1806, for receiving the notice of event evaluation unit 1804, calculate Ttrig ' and Ttrig "; the Nobject preserve parameter storage unit 1801 and current measuring object number compare, and according to comparative result using Ttrig ' and Ttrig " be saved in parameter storage unit 1801 as the Tx value after renewal.

Further, event evaluation unit 1804 for obtaining the Tx value upgraded from parameter storage unit 1801, and determines according to the Tx value of described renewal the time sending measurement report.Because Tx value is updated to Ttrig ' or Ttrig from Ttrig ", the accuracy of measurement report can be improved to a greater degree.

Figure 19 upgrades Ttrig to Ttrig ' and Ttrig in the present invention's instantiation " switching stability and the comparison schematic diagram of switching stability of conventional method.Wherein, conventional method refers to all measuring objects of wheel flow measurement serving BS configuration, and uses fixing measurement report observing time (Ttrig).Instantiation of the present invention is removed by measuring object poor for signal strength signal intensity, the Ttrig time delay of saving is used for extend Ttrig, and before removing Ttrig cut-off, for the invalid unit measurement period of the measuring object that this Ttrig is corresponding, send measurement report in advance.

Find out from simulation result, after triggering measurement report trigger event for certain measuring object, instantiation of the present invention increases the measuring frequency of this measuring object, thus improve the accuracy of measurement result, make serving BS can select reliable target BS better according to measurement report.Therefore, after user is switched to the target BS selected by the way, can not occur within the short time again to switch, thus improve the stability switched, reduce unnecessary switching, decrease the break period of user, improve user throughput and user satisfaction.

Figure 20 upgrades Ttrig to Ttrig after removing measuring object in the present invention's instantiation " ' after measurement report time delay and the comparison schematic diagram of measurement report time delay of conventional method.In fig. 20, instantiation of the present invention removes the poor measuring object of signal strength signal intensity, the Ttrig time delay of saving is used for reducing measurement report time delay, and unit measurement period invalid before removing Ttrig cut-off, send measurement report in advance.Can find out, compare with conventional method, instantiation of the present invention decreases measurement report time delay to a greater degree, ensures that user switches in time.

Figure 21 is the comparison schematic diagram of transmission time interval in the transmission time interval of the measurement report of two different measuring objects in the present invention's instantiation and conventional method, and these two different measuring objects refer to two different frequencies.In figure 21, instantiation of the present invention is removed by measuring object poor for signal strength signal intensity, the measurement interval of two good measuring objects of signal strength signal intensity is reduced, thus reduces the time interval of two Ttrig triggerings, the final transmission time interval reducing by two measurement reports.

When minimizing two measurement reports arrive the time interval of serving BS, when serving BS receives the measurement report of cell1 (F1), also may not send to user the handover execution command comprising cell2 (F2).So, serving BS again will be made switching and be determined, select cell1 (F1) as target BS, and send handover cancelling order to cell2 (F2), inform that cell2 (F2) user will not be switched to it in time.That is, before serving BS transmission comprises the handover execution command of cell2 (F2), this switching has just been cancelled.Meanwhile, serving BS sends handover request order to cell1 (F1), is exactly afterwards to switch prepare and switch the processes such as execution.

Can find out, by reducing time interval of measurement report, can ensure that user can be switched to best target BS, user is connected with best target BS always, thus avoid the problem that occurs shown in Fig. 9, raising customers' satisfaction level.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. the method for handover measurement in mobile communication, is characterized in that, comprising:

2. method according to claim 1, is characterized in that, describedly from described first object set, removes one or more measuring object comprise:

Object is set and removes trigger event;

3. method according to claim 2, is characterized in that, described object is removed trigger event and is: Mm+Ofm+Ocm+Hys<Mn+Ofn+Ocn-Off,

4. method according to claim 2, is characterized in that, described object is removed trigger event and is: Mm+Ofm+Ocm+Hys<Ms+Ofs+Ocs-Off,

5. method according to claim 2, it is characterized in that, described object removes trigger event: Mm+Hys<Threshold, wherein M is the measurement result of measuring object, Hys is hysteresis index, Threshold is threshold value, and subscript m represents a measuring object in the first object set;

6. the method according to any one of claim 2-5, is characterized in that, comprises further:

7. method according to claim 1, is characterized in that, described in reset measuring object in all units measurement period and described second object set corresponding relation comprise:

8. method according to claim 1, is characterized in that, described in reset measuring object in all units measurement period and described second object set corresponding relation comprise:

9. the method according to claim 7 or 8, is characterized in that, the described monitoring situation according to measurement report trigger event sends measurement report and comprises:

10. the method according to claim 7 or 8, is characterized in that, the described monitoring situation according to measurement report trigger event sends measurement report and comprises:

11. methods according to claim 10, is characterized in that, the described monitoring situation according to measurement report trigger event sends measurement report and comprises:

12. methods according to claim 1, is characterized in that, comprise further: when the recover condition determining to preset meets, recover the measurement to the signal strength signal intensity removing measuring object.

13. methods according to claim 12, is characterized in that, the described recover condition determining to preset is satisfied to be comprised:

14. methods according to claim 1-5, any one of 7-8,12-13, is characterized in that, describedly determine that the first object set comprising one or more measuring object comprises:

15. methods according to claim 1-5, any one of 7-8,12-13, it is characterized in that, describedly determine that the first object set comprising one or more measuring object comprises: user terminal is searched for different carrier frequency or access way, using the carrier frequency that detects or access way as measuring object, be increased in the first object set.

16. methods according to claim 1-5, any one of 7-8,12-13, is characterized in that, describedly determine that the first object set comprising one or more measuring object comprises:

17. methods according to claim 1-5, any one of 7-8,12-13, it is characterized in that, measuring object in described first object set is different with the carrier frequency that serving BS uses, or measuring object in described first object set is different with the access way that serving BS uses.

18. 1 kinds of user terminals, is characterized in that, comprising:

19. terminals according to claim 18, is characterized in that, described object control unit comprises:

Removing definition module, removing trigger event for arranging object;

20. terminals according to claim 19, it is characterized in that, described object is removed module and is used for: arrange object and remove observing time, after monitoring described object removal trigger event, start this object for measuring object to be removed and remove observing time, and all units measurement period distributing to this measuring object to be removed in observing time is removed to described object monitor; If described object can be monitored in described all units measurement period remove trigger event, after described object is removed and terminated observing time, stop measuring described measuring object to be removed, described measuring object to be removed is become and removes measuring object.

21. terminals according to claim 19, is characterized in that, described object control unit comprises further:

22. terminals according to claim 19, is characterized in that, described object control unit comprises further:

23. terminals according to any one of claim 18-22, it is characterized in that, described object control unit comprises further: object recovers module, during for meeting at the recover condition determining to preset, recovers the measurement to the signal strength signal intensity removing measuring object.

24. terminals according to any one of claim 18-22, is characterized in that, the measurement configuration that described parameter storage unit provides for preserving serving BS, and described measurement is configured for first object set of specifying and comprising one or more measuring object.

25. terminals according to any one of claim 18-22, it is characterized in that, described measurement performance element is further used for searching for different carrier frequency or access way, and using the carrier frequency that detects or access way as measuring object, be increased in the first object set that described parameter storage unit preserves.