CN101808358A

CN101808358A - Measurement switching method and device in mobile communication

Info

Publication number: CN101808358A
Application number: CN200910009335A
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: 2010-08-18
Anticipated expiration: 2029-02-18
Also published as: JP2010193456A; JP5412624B2; CN101808358B

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 the mobile communication

Technical field

The user who the present invention relates in the mobile communication system is switched, and refers to the method and apparatus of handover measurement in a kind of mobile communication especially.

Background technology

Cellular mobile telephone brings great convenience for people's communication, and (Global System for Mobile Communication GSM) adopts digital communication to second generation global system for mobile communications, has further improved the speech quality of mobile communication.Third generation partner program (3rd Generation Partnership Project, 3GPP) as the vital tissue of moving communicating field, promoted 3G (Third Generation) Moblie technology (The Third Generation greatly, standardization progress 3G), formulate a series of Wideband Code Division Multiple Access (WCDMA) that comprise and inserted (Wide Code Division Multiple Access, WCDMA), high speed downlink packet inserts (High Speed Downlink Packet Access, HSDPA), (High Speed Uplink Packet Access HSUPA) waits in interior communication system standard in the high speed uplink packet access.

In order to tackle the challenge of broadband access technology, and satisfy the demand of growing novel business, 3GPP will have started 3G Long Term Evolution (Long Term Evolution in the end of the year 2004, LTE) standardization effort of technology, wish further to improve spectrum efficiency, improve the performance of Cell Edge User, reduce system delay, the access service of higher rate etc. is provided for the high-speed mobile user.On the basis of LTE, several times increase spectral bandwidth to following LTE-A technology, significantly improve data rate especially, and the service of higher rate, better performance is provided for more mobile subscribers.

In above-mentioned mobile communication system, the user is particularly important in the mobile management that connects under (CONNECTED) state.In order to realize ambulant management under connection status to the user, defined switching in the mobile communication system, the user who allows to be in connection status switches to other sub-district when satisfying certain condition.If do not switch, the situation of new sub-district can appear inserting once more behind the call drop in the user when shifting out Serving cell, can have a strong impact on customers' satisfaction level like this.

In general, switching comprises three main operations: measurement, switch decision, switching are carried out.The flow chart of Fig. 1 for switching in the conventional method comprises:

Step 101-103: after the user receives the measurement configuration that serving BS provides, measure Serving cell and adjacent sub-district Reference Signal Received Power (Received Signal Received Power, RSRP).Satisfying under the situation of certain condition, the user sends measurement report to serving BS.

Step 104-105: whether serving BS switches according to the measurement report decision of receiving, if, then according to the signal strength signal intensity of each adjacent sub-district in the measurement report, select a target BS, notify the user to switch to this target BS.

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

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

Consider different on target BS and serving BS place carrier frequency and the access technology, switching can be divided into three kinds: with switch frequently, alien frequencies switches, different system is switched.In multilayer overlay network shown in Figure 2, multiple wireless access way coexistence.

When target BS and serving BS belonged to the same carrier frequency of same wireless access system, this switched to switching frequently.Such as, target BS and serving BS all this one deck of LTE-A 3.4G (being that indoor focus covers), then belong to switching frequently.When but target BS and serving BS belonged to same system different carrier frequency, this switched to alien frequencies and switches.Such as, serving BS is at LTE-A 3.4G layer, and target BS then belongs to alien frequencies and switches at LTE-A 2.5G layer.When target BS and serving BS belonged to the different radio connecting system, this switched to different system and switches.Such as, serving BS is at LTE-A 800M layer, and target BS then belongs to different system and switches at the WCDMA layer.

Different switchings need be adopted dissimilar measurements, and is as shown in table 1.

Table 1 switches and measures type

For switching with frequency, because target BS and serving BS are on the same carrier frequency, the user with the signal strength signal intensity that just can listen to target BS when serving BS is connected, therefore only need carry out common frequency measurement, and it is auxiliary not need specific Measuring Time (gap).

Switch and the switching of different system for alien frequencies, then need to adopt different-frequency measure.The user when the signal strength signal intensity of target BS is measured, need with the carrier frequency synchronization of target BS, can monitoring signal intensity, and the user can't communicate with serving BS at this moment.As can be seen, different-frequency measure needs specific measurement gap to assist.

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

1, after user and serving BS connected, serving BS can be measured configuration to the user.Described measurement configuration mainly comprises some measurement parameters is set, such as measuring object, Measuring Time (gap), measurement report trigger event, measurement report observing time (Ttrig) etc.

Measuring object is meant other frequency or other system that covers the user region, such as frequency 1 (F1), and frequency 2 (F2), or WCDMA, GSM etc.

For measuring gap, two kinds of forms have been provided in the 3GPP technical specification.Wherein, the length of measuring gap all is set at 6ms, and the repetition period of measurement gap is respectively 40ms and 80ms.In addition, in order to obtain an accurate measurement result, a measuring object (such as F2) needs could obtain a measured value through unit measurement period (Tunit), and this unit measurement period comprises a plurality of continuous measurement gap.That is to say that the user is when distributing measurement gap, being actually measurement gap is that unit distributes to the measuring object use with Tunit.Such as, the continuous a plurality of measurement gap in certain Tunit distribute to same measuring object, and the continuous a plurality of measurement gap in the ensuing Tunit then distribute to another measuring object.Generally speaking, the unit measurement period is 480ms, when the repetition period of measuring gap is 80ms, comprises the measurement gap of 6 6ms in this Tunit, and all the other times except that measuring gap still are used for communicating with the base station.

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

2, the user monitors the signal strength signal intensity of this measuring object in the unit measurement period of certain measuring object (such as F2) after receiving the measurement configuration, satisfies certain incident such as incident A3 (EventA3) if find this measuring object, then picks up counting.

3, when the duration that F2 satisfies EventA3 surpassed Ttrig, the user sent measurement report to serving BS, and described measurement report carries about the cell information that satisfies EventA3 on the F2 (as cell id, signal strength values etc.).

Particularly, EventA3 is defined as the RSRP of adjacent sub-district than the big side-play amount of Serving cell, shown in inequality (1).

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

Wherein, Mn is the measurement result of adjacent sub-district, and Ofn is adjacent frequency offset frequently, and Ocn is the sub-district side-play amount of adjacent sub-district, and Hys is a sluggish coefficient; Ms is the measurement result of Serving cell, and Ofs is the frequency offset of service frequency, and Ocs is the sub-district side-play amount of Serving cell, and Off is the event offset amount.In inequality (1), Mn, Ms, Off are three comparatively main parameters.

Standard provides, and when a plurality of alien frequencies or different system need measure, a plurality of measuring objects is measured in turn, and be Nobject * 480ms measuring period so, and Nobject is the measuring object number.Because a plurality of measuring objects wheel flow measurements, after measuring once, each measuring object to wait until that other measuring objects all measure to be taken turns to again to measure.Like this, following situation will appear.

Situation one

Suppose that certain measuring object (such as F2) constantly in fact can satisfy EventA3 at t0, as shown in Figure 3.But according to existing measuring machine system, the t0 moment and ensuing unit measurement period all are used for measuring other measuring object, are used for measuring the unit measurement period of F2 up to t1 just arrival constantly.That is to say that the user need wait until that t1 constantly finds that just F2 has satisfied EventA3, and be F2 triggering Ttrig timing constantly, below t0 is called the Ttrig time delay to the time-delay of this section of t1 at t1.

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

Can see that if there is not the Ttrig time delay, the user may carry out switching constantly at t1+ Δ t, this moment, the channel quality of serving BS also was not poor especially.Yet because the Ttrig time delay has been arranged, the user t3 that delays time carries out switching constantly, and this moment, the channel quality of serving BS may be poor to the stage that has a strong impact on communication quality even call drop, and the influence that this time delay is brought sees Table 2.

The Ttrig time delay	The MR time delay	The handover trigger time delay	Negative effect
The Ttrig time delay	The MR time delay	The handover trigger time delay	Negative effect	??t1-t0	??t2-t0	??t3-t0	Make the user be trapped in the very poor Serving cell of channel quality the long period

Table 2 is taken turns the time delay and the influence of flow measurement

Situation two

When the user monitors out after F2 satisfies EventA3, trigger the Ttrig timing, if the measurement result of the F2 that obtains during Ttrig all satisfies EventA3, then after Ttrig finishes user's transmission about the measurement report of F2, i.e. MR (F2).Because a plurality of measuring objects are arranged, and a plurality of measuring objects also are tested in turn during the Ttrig, as shown in Figure 4, cause during Ttrig the user can only distribute a Tunit to measure for 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, be instantaneous shade or decline soon and influence received signal quality, single sampling is the truth that is not enough to reflect channel quality, offer the measurement report of a mistake of serving BS possibly, finally make serving BS select the target BS of a mistake, the user inserts the target BS of a mistake, cause rattling, instantaneous switching once more, even call drop.

Situation three

As shown in Figure 7, the situation that a plurality of frequencies almost trigger the Ttrig timing simultaneously also may appear.At t1 constantly, the user monitors F2 and satisfies EventA3, triggers the Ttrig timing, is designated as Ttrig2; As shown in Figure 8, before Ttrig2 did not also finish, the user monitored F1 again and satisfies EventA3, triggers the Ttrig timing, is designated as Ttrig1, and the duration of Ttrig1 and Ttrig2 is identical.As can be seen, at t2 to t3 during this period of time, two Ttrig are arranged in timing, wherein Ttrig2 is at F2, and Ttrig1 is at F1.After Ttrig2 and Ttrig1 finished, if F2 that the user monitors and F1 satisfy EventA3 during Ttrig, then the user sent measurement report about F2 and F1 respectively to serving BS, and detailed process as shown in Figure 9.

Step 901: after Ttrig2 finished, the user will be about the MR of F2, and promptly 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 handoff request to cell2.

Step 904: after Ttrig1 finished, the user will be about the MR of F1, and promptly MR (F1) sends to serving BS.

If MR (F1) is long with the time interval that MR (F2) arrives serving BS, this moment, serving BS sent the handover execution command that comprises cell2 (F2) to the user, and that serving BS will be ignored MR (F1).Yet for various reasons, for example based on RSRP intensity, sub-district present load, telephone expenses, the available data rate of system etc., cell1 more has superiority, and this user may be more prone to select cell1 (F1) as target BS.But the user but fails to switch to optimal target BS, i.e. cell1 (F1), thus influence user satisfaction.

In LTE and LTE-A,, increase to maximum 20M, 100M by the maximum bandwidth 10M of 3G because system bandwidth becomes big.Synthetic by a plurality of discrete 5M when the 20M bandwidth, perhaps the 100M bandwidth is by a plurality of discrete 20M bandwidth when synthetic, the certain user a moment can only be on a 5M or 20M transceive data, and can not be on whole 20M or 100M bandwidth transceive data.Like this, (Inter Frequency, adjacent sub-district inter-F) is with ubiquity for alien frequencies.Simultaneously, future mobile communication system also is the multi-address access network of a multiple wireless access technology coexistence, and (Inter Radio Access Technology, adjacent sub-district inter-RAT) is also with ubiquity to adopt different access technology.In order to reach the load balancing between inter-F, the inter-RAT system, and guarantee that the user is connected with a best sub-district always, the switching of inter-F and inter-RAT is extremely important, so is used to ensure that the measurement of quality of handoff also becomes more important.Accordingly, how to handle the problem that a plurality of measuring object wheel flow measurements bring in the different-frequency measure better 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 is achieved as follows:

The method of handover measurement in a kind of mobile communication comprises:

Determine to comprise first object set of one or more measuring object, a plurality of measurement period Tunit of unit are distributed to each measuring object in first object set in turn;

From described first object set, remove one or more measuring object and obtain second object set, and the unit measurement period of removing measuring object is reallocated;

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

Described one or more measuring object of removing from described first object set comprises:

Object is set removes trigger event;

After at least one unit measurement period of measuring object in described first object set monitors described object removal trigger event, stop to measure the signal strength signal intensity of this measuring object in follow-up a plurality of units measurement period of described measuring object.

Described object is removed 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 sub-district side-play amount of measuring object, and Hys is sluggish coefficient, and Off is the event offset amount;

Subscript n represents to have in first object set measuring object of best signal strength, and subscript m is represented a measuring object in 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 the signal strength signal intensity that this measuring object is obtained in described unit measurement period and all measuring objects in first object set have compares, if the little side-play amount of the signal intensity ratio best signal strength of this measuring object then is defined as monitoring object and removes trigger event.

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

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

This measuring object is compared in signal strength signal intensity and the service signal of base station intensity that described unit measurement period obtains, if the little side-play amount of the signal strength signal intensity of the signal intensity ratio serving BS of this measuring object then is defined as monitoring object and removes trigger event.

Described object is removed trigger event: Mm+Hys＜Threshold, and wherein M is the measurement result of measuring object, and Hys is sluggish coefficient, and Threshold is a threshold value, and subscript m is represented a measuring object in first object set;

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

This method further comprises:

Object is set removes observing time, and after monitoring described object removal trigger event, start this object at measuring object to be removed and remove observing time, and described object removed distribute to this in observing time and wait that all unit measurement period of removing measuring object monitor;

Remove trigger event if can both monitor described object, after described object is removed end observing time, stop to measure measuring object described to be removed, measuring object described to be removed is become remove measuring object in described all unit measurement period.

The described unit measurement period of removing measuring object is reallocated comprises:

User terminal sends the up signaling of carrying described unit measurement period to serving BS, informs that the serving BS user terminal still rests on service frequency in described unit measurement period;

Serving BS is according to the indication of described up signaling, and measurement period is received and dispatched this user's data in described unit.

The described unit measurement period of removing measuring object is reallocated comprises: user terminal is set to the measurement period dormancy in described unit.

Follow-up all unit measurement period are distributed to each measuring object in second object set in turn.

From second object set, search the measuring object of signal strength signal intensity maximum;

Described follow-up a plurality of units measurement period of having removed measuring object is distributed to the measuring object of described signal strength signal intensity maximum.

Described monitoring situation according to the measurement report trigger event is sent measurement report and is comprised:

After monitoring the measurement report trigger event at first measuring object, for described first measuring object starts first measurement report Ttrig observing time that serving BS is provided with, and all unit measurement period of distributing to this first measuring object in the described Ttrig are monitored;

If can both monitor described measurement report trigger event, after described Ttrig finishes, send measurement report at described first measuring object in described all unit measurement period.

The second measurement report Ttrig ' observing time is set, described Ttrig '=Ttrig+ (Nskip/2) * Tunit, wherein Ttrig is first measurement report observing time that serving BS is provided with, the measuring object number of Nskip for removing;

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

If can both monitor described measurement report trigger event, after described Ttrig ' end, send measurement report at described first measuring object in described all unit measurement period.

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

All unit measurement period of distributing to this measuring object in ", and to described Ttrig " after monitoring the measurement report trigger event at first measuring object, for described first measuring object starts described Ttrig are monitored;

" after finishing, send measurement report if can both monitor described measurement report trigger event in described all unit measurement period, at described first measuring object at described Ttrig.

This method further comprises: when determining that default recovery condition satisfies, recover the measurement to the signal strength signal intensity of removing measuring object.

Describedly determine that default recovery condition satisfies and comprise:

After from described first object set, removing measuring object, startup is to removing the timing of time, and after the removal time finishes, judge that current one or more measurement report that whether is in is in observing time, if be not in any measurement report in observing time, determine that then default recovery condition satisfies; Perhaps

After all measurement report end observing time, determine that default recovery condition satisfies; Perhaps

During the signal strength signal intensity variation of the measuring object in second object set, removed from one or more and to have chosen second measuring object measuring object, and determined to satisfy at the recovery condition of this second measuring object with best signal strength.

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

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

Describedly determine that first object set that comprises one or more measuring object comprises: user terminal is searched for different carrier frequency or access way, and detected carrier frequency or access way as measuring object, are increased in first object set.

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

According to the measuring object of measuring appointment in the configuration and the measuring object that user terminal searches, determine described first object set.

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

A kind of user terminal comprises:

Parameter storage unit is used to preserve first object set that comprises one or more measuring object, and is used to preserve the corresponding relation of measuring object and the measurement period Tunit of unit;

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

Object control unit, be used to be provided with the corresponding relation of measuring object and unit measurement period, and the measurement result that obtains according to described measurement performance element, from described first object set, remove one or more measuring object and obtain second object set, the unit measurement period of removing measuring object is reallocated, upgrade the corresponding relation of measuring object and unit measurement period according to the reallocation result.

Described object control unit comprises:

Remove definition module, be used to be provided with object and remove trigger event;

Object is removed module, be used at least one unit measurement period at the measuring object of described first object set and monitor after described object removes trigger event, stop to measure the signal strength signal intensity of this measuring object in follow-up a plurality of units measurement period of described measuring object.

Described object is removed module and is used for: object is set removes observing time, after monitoring described object removal trigger event, start this object at measuring object to be removed and remove observing time, and described object removed distribute to this in observing time and wait that all unit measurement period of removing measuring object monitor; Remove trigger event if can both monitor described object, after described object is removed end observing time, stop to measure measuring object described to be removed, measuring object described to be removed is become remove measuring object in described all unit measurement period.

Described object control unit further comprises:

The Tunit distribution module is used for follow-up all unit measurement period are distributed in turn each measuring object of second object set.

Described object control unit further comprises:

The Tunit distribution module is used for searching from second object set measuring object of signal strength signal intensity maximum, described follow-up a plurality of units measurement period of having removed measuring object is distributed to the measuring object of described signal strength signal intensity maximum.

Described object control unit further comprises: object recovers module, is used for recovering the measurement to the signal strength signal intensity of removing measuring object when determining that default recovery condition satisfies.

Described parameter storage unit is used to preserve the measurement configuration that serving BS provides, and described measurement configuration is used to specify first object set that comprises one or more measuring object.

Described measurement performance element is further used for different carrier frequency or access way are searched for, and with detected carrier frequency or access way as measuring object, be increased in 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, under the situation that has a plurality of measuring objects to measure, for situations such as different frequency/different systems, by being set, object removes trigger event, temporary transient remove the relatively poor measuring object of signal strength signal intensity, and the unit measurement period that will remove object distributes to signal strength signal intensity measuring object preferably, thereby increase the signal strength signal intensity monitoring and the measuring frequency of measuring object preferably.

Further, embodiments of the invention carry out adaptive updates to Ttrig, and promptly the length of Ttrig can be according to total measuring object number and the adaptive change of uncared-for measuring object number.And, if, will send measurement report in advance, thereby reduce the measurement report time-delay in remaining time of Ttrig not again during the measuring object of this Ttrig of measurement triggering.Like this, the accuracy and the promptness of measurement result be can guarantee largely, the reliability of switching and the speech quality of Cell Edge User improved.

Description of drawings

The flow chart of Fig. 1 for switching in the conventional method.

Fig. 2 is the structural representation of the multilayer overlay network of multiple wireless access way coexistence.

The schematic diagram that Fig. 3 sends measurement report and switches for the variations according to Target cell (F2) and Serving cell (F0).

Fig. 4 takes turns the schematic diagram of flow measurement for a plurality of measuring objects in the conventional method.

Fig. 5 is the comparison schematic diagram that is subjected to the variations of measuring object F2 that shade influences and service frequency F0.

Fig. 6 is subjected to decline soon the comparison schematic diagram of variations of the measuring object F2 that influences and service frequency F0.

Fig. 7 almost triggers the schematic diagram of Ttrig timing simultaneously for a plurality of measuring objects.

Fig. 8 is the schematic diagram that a plurality of measuring objects almost send measurement report simultaneously in the conventional method to serving BS.

Fig. 9 is the transmission flow figure of a plurality of measurement reports.

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

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

Figure 12 upgrades the method flow diagram of Ttrig for user in the one embodiment of the invention.

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

Figure 14 is the measuring sequence figure that triggers traditional Ttrig timing in the one embodiment of the invention behind the removal differential measurement object.

Figure 15 is for being used for the structure drawing of device of handover measurement among the present invention.

Figure 16 is for being used to be provided with the structure drawing of device that object is removed trigger event in the one embodiment of the invention.

The structure drawing of device of Figure 17 for being used in the one embodiment of the invention remove the relatively poor measuring object of signal strength signal intensity and recover this measuring object.

Figure 18 is for being used to upgrade the structure drawing of device of Ttrig in the one embodiment of the invention.

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

Figure 20 is the comparison schematic diagram of the measurement report time delay of removing the measurement report time delay that adopts traditional Ttrig behind the measuring object and conventional method in instantiation of the present invention.

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 instantiation of the present invention and the conventional method.

Embodiment

For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.

Embodiments of the invention provide a kind of method of carrying out different frequency/different system handover measurement at user terminal, comprise: user terminal determines to comprise first object set of one or more measuring object, and a plurality of measurement period Tunit of unit are distributed to each measuring object in first object set in turn.

Wherein, user terminal determines that the concrete mode of first object set can be to receive the measurement configuration that serving BS provides, measure first object set that obtains appointment the configuration from this, also can be different carrier frequency or access way to be searched for by user terminal, detected carrier frequency or access way as measuring object, are finally formed first object set.

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

That is to say that owing to removed the no longer unit's of taking measurement period of measuring object, the unit measurement period that these free time get off can be reallocated to one or more measuring object use in second object set.Such as, if the unit measurement period that these free time get off wants uniform distribution to use for all measuring objects in second object set, just need adjust again the corresponding relation of original setting is whole.If only the unit measurement period that these free time are got off is distributed to the measuring object that has maximum signal in second object set, originally distribute to the unit measurement period of other measuring object and can readjust.

At last, the signal strength signal intensity of each measuring object in described second object set is measured, sent measurement report according to the monitoring situation of measurement report trigger event.Wherein, removed measuring object generally is the relatively poor measuring object of signal quality.

Wherein, measure configuration and be used to specify first object set that comprises one or more measuring object, and also Measuring Time can be set in the measurement configuration.That is to say, what a or a plurality of Measuring Time serving BS divide in advance, the user distributes to each measuring object in first object set with these Measuring Time in turn according to unit measurement period (Tunit), and the corresponding relation of Tunit and measuring object promptly is set by the user.

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

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

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

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

When concrete the application, object is removed trigger event (EventC) can multiple implementation, below is illustrated for three examples.It is pointed out that owing among the TS 36.331 to have defined measurement report trigger event A1-A5, B1-B2, so object is 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 relatively poor, the signal strength signal intensity of measuring object F2 is best.

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

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

It is to consider that EventC1 is set: for F2, the signal strength signal intensity of F3 is relatively poor.Therefore, even the big side-play amount of the signal intensity ratio service frequency F0 of F3, can be chosen as target BS, but the user switches to after the F3, because the big side-play amount of signal intensity ratio F3 of F2, this user can switch to F2 from F3 again, and so frequent switching can influence user's speech quality at once.Therefore, F3 is removed from first object set, can improve the efficient of measurement.Have, by TtrigC and side-play amount Off are set, the signal strength signal intensity that can guarantee F3 possibility greater than the signal strength signal intensity of F2 in the removal time (Tskip) is very low, makes that the accuracy of measuring is also secure again.

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

Mm+Ofm+Ocm+Hys＜Mn+Ofn+Ocn-Off

Wherein, subscript m is represented certain measuring object in first object set, and n represents to have in first object set measuring object of best signal strength.

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

M3+Of3+Oc3+Hys＜Ms+Ofs+Ocs-Off?????(3)

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

M3+Hys＜Threshold??????(4)

For EventC2 and EventC3, by TtrigC and side-play amount Off are set, the signal strength signal intensity of F3 increases in the removal time (Tskip) that to satisfy the possibility that becomes target BS very low, and it is rational ignoring in Tskip therefore that F3 do not measure.

In addition, can remove trigger event at object one period observation period is set, promptly object is removed observing time (TtrigC), and its effect is similar with Ttrig, and only Ttrig is the observation period that is provided with at the measurement report trigger event.In distributing to the unit measurement period of certain measuring object, satisfy EventC if detect the signal strength signal intensity of this measuring object, then this unit measurement period is removed observing time the starting point of (TtrigC) as object, and the unit measurement period that belongs to this measuring object in TtrigC is proceeded to detect, if the signal strength signal intensity of this measuring object all unit measurement period of distributing to this measuring object in TtrigC all satisfy EventC, then after TtrigC finishes, this measuring object is removed.Particularly, TtrigC can be at these three incident settings of EventC1-3, and promptly any one in these three incidents must all satisfy during TtrigC, just can carry out object and remove operation, and this differential measurement object is ignored.

Have again, can determine to remove several differential measurement objects according to minimum measuring object number (Nmin).Wherein, Nmin is used to specify the number that needs the measured object that keeps at least, such as keeping 2 measuring objects at least.

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

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

1, the Tunit that will remove measuring object distributes to service frequency F0, is used for carrying out uplink and downlink communication with the base station, thereby improves the user's communications quality.Be specially: the user sends a up signaling to serving BS, informs that the serving BS user also rests on service frequency at these Tunit, requires serving BS to continue to send, receive this user's related data.This scheme can improve user's throughput.

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

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

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

(1) redistributes Tunit according to the measuring object number that comprises in second object set, use the Tunit that redistributes that the measuring object in second object set is measured.

The measuring object of supposing the serving BS appointment is F1-F4, the unit measurement period be numbered Tunit1, Tunit2, Tunit3, Tunit4, Tunit5, Tunit6 ..., all Tunit take turns flow distribution in first object set, the unit measurement period of promptly originally distributing to F1 is Tunit1, Tunit5, Tunit9....After removing F2, all Tunit take turns flow distribution again in second object set, and the unit measurement period of then distributing to F1 is Tunit1, Tunit4, Tunit7....Wherein, each Tunit is the set of a plurality of measurement gap.

(2) the unit measurement period that will remove measuring object is distributed in second object set signal strength signal intensity measuring object preferably, strengthens the signal strength signal intensity measurement dynamics of measuring object preferably.

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

Step 1004: all measuring objects in second object set are measured, obtained measurement result, and send measurement report according to the monitoring situation of measurement report trigger event.

Step 1005: for removing measuring object, can be according to default recovery condition, recovery is to the measurement of its signal strength signal intensity, and the feasible actual signal situation of measuring more identical network is brought the Ttrig time delay such as avoiding certain signal strength signal intensity of having removed measuring object to improve but because be left in the basket.

During specific implementation, can adopt following three kinds of modes, the recovery condition of having removed measuring object is set.

1, after all Ttrig finish, recovers removing the measurement of measuring object.

2, when the better measuring object that keeps has a unexpected variation, determine a signal strength signal intensity preferably from a plurality of the removal the measuring object, recover measurement to this measuring object.

3, is set the removal time (Tskip), after Tskip finishes,, then recovers removing the measurement of measuring object if do not open Ttrig at any measuring object.For EventC1, EventC2, EventC3, but the value separate configurations of Tskip.

As can be seen, the step 1001 of Figure 10 is that to obtain first object set with the measurement configuration that receives serving BS and provide be example.During specific implementation, also can form first object set by user terminal oneself search measuring object.Can search for all frequencies that can insert when the start such as, user terminal,, and the frequency that searches or access way noted be increased to first object set so that select a proper cell to insert.For another example, user terminal can read the broadcast message of this sub-district after inserting proper cell, obtains some and rise to the information of the measuring object of first object set from broadcast message, comprises the information of measuring objects such as alien frequencies, different system.And for example, user terminal also can be searched for different measuring objects when the idle state, and this search can be periodically also can be Event triggered.And for example, the user also can utilize measurement gap that measuring objects such as new alien frequencies, different system are searched for after changing the connected state over to, and this search can be periodically also can be Event triggered.It is pointed out that in a single day user terminal searches new measuring object, just it can be increased in first object set.

For base station configuration and this dual mode of user search, first object set can be brought in constant renewal in.Under the situation of base station configuration, the base station can change measuring object at any time, and user terminal passes through to receive measurement config update first object set of base station under the connected state.In addition, this dual mode can be used in combination, such as determining first object set according to the measuring object of measuring appointment in the configuration and the measuring object that user terminal searches.

Step 1101: user terminal begins measuring object is measured after the measurement configuration of receiving serving BS.If serving BS has disposed EventC, the user carries out according to configuration and gets final product; Otherwise user terminal is provided with object removal trigger event (EventC) according to the measurement result of a period of time voluntarily, and the minimum measuring object number parameters such as (Nmin) that needs reservation is set.

Step 1102: Pei Zhi measuring object number (Nobject) and Nmin relatively, if Nobject＞Nmin, execution in step 1103.Otherwise, not carry out object and remove, this flow process finishes.

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

Step 1104: the user opens the TtrigC timing for this measuring object.

Step 1105: during the TtrigC timing, continue a plurality of measuring object wheel flow measurements are satisfied EventC if trigger the measurement result of measuring object in distributing to its Tunit of TtrigC always, after TtrigC finishes, execution in step 1106.Otherwise this flow process finishes.

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

Further, after removing one or more measuring object, the Ttrig time delay that can utilize saving is to upgrading the measurement report observing time (Ttrig) of base station configuration, and be kept on this user terminal the measurement report observing time (Tx) that obtains user's setting.

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

Ttrigdelay＝{(N-1)/2}*Tunit????????(5)

Further, owing to removing Ttrig time delay that the differential measurement object saves as shown in Equation (6):

δTtrigdelay＝(Nskip/2)*Tunit??????(6)

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

Ttrig′＝Ttrig+(Nskip/2)*Tunit?????(7)

In addition, when the number of the Tunit that comprises in the Ttrig was not the integral multiple of measuring object, Ttrig did not have help by the measurement of preceding a bit of time to the measuring object that triggers Ttrig.Therefore, this short time can be skipped, thereby send measurement report in advance.Particularly, if Ttrig ' is the multiple of Nkeep*Tunit, what then Ttrig ' ended preceding last Tunit measurement is exactly the measuring object that triggers Ttrig, useful to this measurement report, so measurement report will wait until that Ttrig ' is by sending afterwards; If Ttrig ' is not the multiple of Nkeep*Tunit, then Ttrig ' is not the measuring object of measurement triggering Ttrig by the measurement result of preceding last even a plurality of Tunit, do not have any effect for measurement report, this moment, Ttrig can further be updated to Ttrig "; as shown in Equation (8), so that send measurement report in advance.

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

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

Table 3 is illustrated under the situation of 5 measuring objects of serving BS configuration, and Nkeep is respectively the updating value of 2,3,4 o'clock Ttrig.Wherein, the parameter value of express time multiply by 480ms for the table intermediate value.

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

As can be seen from Table 3, utilize formula (7) that the length that the Ttrig time delay of saving is used for increasing Ttrig is obtained Ttrig ', observing during Ttrig ' has increased the measurement of measuring object number of times, thereby improves the accuracy of measurement result.Then, utilize formula (8) that Ttrig ' is further optimized, can reduce the measurement report time delay to a certain extent.If better reduce the measurement report time delay, can the Ttrig time delay of saving be used for increasing the length of Ttrig.Like this, under the situation that reduces the measuring object number, just can find EventA3 in advance, and use traditional Ttrig to carry out measurement report and observe.

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

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

" the effect that ' renewal brings that table 4 couple Ttrig carries out Ttrig

In table 3 and table 4, the accuracy that tested number of times can the reflected measurement result, it is many more to measure number of times, and measurement result is accurate more.What the MR time delay embodied is to switch the time of postponing, and the measurement report time delay is big more, switch late more, the more possible call drop of user.In table 3, the MR time delay is Ttrig time delay and Ttrig " and; In table 4, the MR time delay is Ttrig time delay and Ttrig " ' sum.

Contrast table 3 and table 4 under the situation of removing measuring object, increase Ttrig with the time of saving and can obtain measurement result more accurately, and use traditional Ttrig can obtain shorter measurement report time delay.As can be seen, the time delay of measurement report and accuracy can not obtain simultaneously, and the method for table 3 is in order to improve the accuracy of measurement report to a greater degree, and the measurement report time delay is just had only less minimizing.The minimizing that table 4 is bigger the measurement report time delay, but the accuracy of measurement report is not improved.

Further, even without reducing the measuring object number, still can be similar to the renewal shown in the formula (9) to traditional Ttrig.At this moment, only need to change Nkeep into Nobject and get final product, promptly Ttrig " "=Ttrig-mod (Ttrig, Nobject*Tunit).

As can be seen, can directly get Ttrig the measurement report observing time (Tx) that the user is provided with, and also can get the value after Ttrig upgraded, such as Ttrig ', Ttrig ", Ttrig " ', Ttrig " " etc.

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

Step 1201: the user detects certain measuring object in measuring process signal strength signal intensity satisfies the condition that becomes target BS, and as EventA3, then execution in step 1202, otherwise this flow process finishes.

Step 1202: whether the measuring object number (Nobject) of judging base station configuration greater than the current measuring object number (Nkeep) of user, if greater than execution in step 1204; Otherwise execution in step 1203.

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

Step 1204: calculate because remove the Ttrig time delay that one or more measuring object is saved according to formula (6).

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

Step 1206: judge whether Ttrig ' is the multiple of Nkeep*Tunit.If, execution in step 1207; If not, execution in step 1208.

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

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

Need to prove that this flow performing can finish to step 1205, step 1206-1208 is optional execution in step.

Figure 13 is the schematic diagram that upgrades the Ttrig value in the one embodiment of the invention, Ttrig ' shown in it and Ttrig ".In Figure 13, Ttrig ' is 2.4s, comprises 5 Tunit, and current 3 measuring object: F1, F2, F3 is arranged.So, the 4th, 5 Tunit is unhelpful to the measuring object that triggers Ttrig, so use formula (8) that Ttrig is updated to Ttrig " (i.e. 3 Tunit), make measurement report to send in advance.

Figure 14 is the instrumentation plan that triggers traditional Ttrig timing in the one embodiment of the invention behind the removal differential measurement object.The signal strength signal intensity of supposing F3 is the poorest, after it is removed, and only remaining F1 of measuring object and F2.Like this, if F2 has satisfied the measurement report trigger event, at most also only F1 such as needs just can be monitored after measuring, and has reduced the time delay that triggers Ttrig, thereby guarantees the promptness of 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, guarantees the accuracy of measurement result.As can be seen, because the minimizing of measuring object, also reduced the time of advent of two measurement results at interval, helps serving BS and select only target BS.

With method of the present invention accordingly, the present invention also provides the device that is used to carry out handover measurement shown in Figure 10.Figure 15 comprises for being used for the structure drawing of device of handover measurement among the present invention:

Parameter storage unit 1501 is used to preserve first object set that comprises one or more measuring object, and is used to preserve the corresponding relation of measuring object and the measurement period Tunit of unit.

Particularly, parameter storage unit 1501 can be used to preserve the measurement configuration that serving BS provides, and described measurement configuration is used to specify first object set that comprises one or more measuring object.

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

Further, measure performance element 1502 and be used for different carrier frequency or access way are searched for, and with detected carrier frequency or access way as measuring object, be increased in first object set that described parameter storage unit 1501 preserves.At this moment, first object set of preserving in the parameter storage unit 1501 is that user terminal oneself searches.

Perhaps, 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, be used to be provided with the corresponding relation of measuring object and unit measurement period, and the measurement result that obtains according to described measurement performance element, from described first object set, remove one or more measuring object and obtain second object set, the unit measurement period of removing measuring object is reallocated, upgrade the corresponding relation of measuring object and unit measurement period according to the reallocation result.

Particularly, can also be provided with in the object control unit 1503: remove definition module 1513 and object and remove module 1523.Wherein, remove definition module 1513, be used to be provided with object and remove trigger event, be saved in the parameter storage unit 1501.Object is removed module 1523, be used at least one unit measurement period at the measuring object of described first object set and monitor after described object removes trigger event, stop to measure the signal strength signal intensity of this measuring object in follow-up a plurality of units measurement period of described measuring object.

Particularly, object is removed module 1523 and is used for: object is set removes observing time (TtrigC), after monitoring object removal trigger event, start this TtrigC at certain measuring object to be removed, and wait that to distributing to this in the TtrigC all unit measurement period of removing measuring object monitor.Further, if removing module 1523, object can both monitor described object removal trigger event in described all unit measurement period, after TtrigC finishes, stop to measure measuring object described to be removed, measuring object described to be removed is become remove measuring object.

Further, can also be provided with in the object control unit 1503: Tunit distribution module 1533 is used for follow-up all unit measurement period of removing measuring object are distributed in turn each measuring object of second object set; Perhaps, be used for searching the measuring object of signal strength signal intensity maximum from second object set, described follow-up a plurality of units measurement period of having removed measuring object is distributed to the measuring object of described signal strength signal intensity maximum, and the corresponding relation of measuring object after will upgrading and unit measurement period is saved in the parameter storage unit 1501.

Further, can also be provided with in the object control unit 1503: object recovers module 1543, is used for recovering the measurement to the signal strength signal intensity of removing measuring object when determining that default recovery condition satisfies.

As can be seen, the corresponding relation of measuring object and unit measurement period is brought in constant renewal in.Satisfy in case object is removed trigger event, just have measuring object and be removed.Correspondingly, the corresponding relation of measuring object and unit measurement period will be adjusted, and reallocates such as the unit measurement period that will be removed measuring object and uses to other measuring object.Corresponding relation after the renewal is kept at parameter storage unit 1501, measures performance element 1502 when carrying out measurement, just can measure the signal strength signal intensity of certain measuring object according to the corresponding relation after upgrading in corresponding unit measurement period.

Further, remove trigger event for object is set, embodiments of the invention provide a kind of user terminal.Figure 16 is for being used to be provided with the structure chart that object is removed the user terminal of trigger event in the one embodiment of the invention.This user terminal comprises: parameter storage unit 1601, measurement performance element 1602, event definition unit 1603, incident assessment unit 1604.

Parameter storage unit 1601, be used to store the measurement parameter of base station configuration, the object that event definition unit 1603 provides is removed trigger event (EventC) and EventC parameter, and the measuring object of incident assessment unit 1604 settings and the corresponding relation of unit measurement period.

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

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

After one or more object is removed, the corresponding relation of measuring object and unit measurement period will the unit's of being updated to measurement period and second object set in the corresponding relation of all measuring objects.Particularly, from first object set, behind one or more measuring object of removal, obtain second object set.

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

Event definition unit 1603 is used to define object and removes trigger event, and according to the measurement result of a period of time the EventC parameter is set, and sends to parameter storage unit 1601.The function class of the removal definition module 1513 among this event definition unit 1603 and Figure 15 seemingly.

During specific implementation, event definition unit 1603 can be defined as EventC1 with EventC, perhaps is defined as EventC2, perhaps is defined as EventC3.If adopt EventC1 to remove trigger event, then need further to determine at the best measuring object n of this section in the time as object.Comprise with the EventC parameter of EventC1 correspondence: the frequency offset Ofn of the measurement result Mn of best measuring object n, best measuring object n, sub-district side-play amount Ocn, the sluggish coefficient Hys of best measuring object n, event offset amount Off etc.

In addition, also can offer user terminal by base station configuration EventC and EventC parameter, user terminal is carried out object according to the configuration of base station and is removed.In this case, also event definition unit 1603 can be set on the user terminal.

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

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

Further, the structure drawing of device of Figure 17 for being used in the one embodiment of the invention remove the relatively poor measuring object of signal strength signal intensity and recover this measuring object.This device comprises: parameter storage unit 1701, measurement performance element 1702, incident assessment unit 1704, removal object timing unit 1705.

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

Measure performance element 1702, be used for measuring, and measurement result is sent to incident assessment unit 1704 according to the measurement parameter that parameter storage unit 1701 is preserved.

Incident assessment unit 1704 is used for the setting according to parameter storage unit 1701 EventC, to assessing from the measurement result of measuring performance element 1702, if satisfy EventC then notify and remove object timing unit 1705.Further, incident assessment unit 1704 is used to judge whether certain measuring object all satisfies EventC during TtrigC, if then notice is removed object timing unit 1705.

Remove object timing unit 1705, be used to receive notice from incident assessment unit 1704, start the TtrigC timing at certain measuring object, and after the TtrigC timing finishes, notifying parameters memory cell 1701 is removed this measuring object, the corresponding relation of measuring object and unit measurement period in the undated parameter memory cell 1701.In the corresponding relation after renewal, the unit measurement period is no longer distributed to removed measuring object.

Further, removing object timing unit 1705 also is used for after removing certain measuring object, begin the Tskip timing at this measuring object, and after the Tskip timing finishes, when perhaps incident assessment unit 1704 is judged other condition of recovering this measuring object and is satisfied, notifying parameters memory cell 1701 is recovered this measuring object, is about to the unit measurement period and redistributes to the measuring object that is resumed.

In concrete the application, remove object timing unit 1705 and can adopt one or more timer to realize.

Further, Figure 18 is for being used to upgrade the structure drawing of device of Ttrig in the one embodiment of the invention.This device comprises: parameter storage unit 1801, measure performance element 1802, incident assessment unit 1804, observing time updating block 1806.Wherein:

Parameter storage unit 1801 is used to preserve the measurement configuration that serving BS provides (such as measuring object number N object etc.), and preserves the measurement report observing time (Tx) that the user is provided with.When initial, the value of Tx is Ttrig.

Measure performance element 1802, the measurement configuration that the memory cell 1801 that is used to get parms is preserved is measured the signal strength signal intensity of measuring object and service frequency, and measurement result is issued incident assessment unit 1804.

Incident assessment unit 1804, be used for according to measuring the measurement result that performance element 1802 provides, and the object removal trigger event that parameter storage unit 1801 provides is judged, if determine that the measurement result of certain measuring object satisfies this object and removes trigger event, then notify observing time updating block 1806.

Observing time, updating block 1806, be used to receive the notice of incident assessment unit 1804, calculate Ttrig ' and Ttrig "; Nobject that parameter storage unit 1801 is preserved and present measuring object number compare, and according to comparative result with Ttrig ' and Ttrig " be saved in the parameter storage unit 1801 as the Tx value after upgrading.

Further, incident assessment unit 1804 is used for obtaining from parameter storage unit 1801 the Tx value of renewal, and sends the time of measurement report according to the Tx value decision of described renewal.Because the Tx value is updated to Ttrig ' or Ttrig from Ttrig ", can improve the accuracy of measurement report to a greater degree.

Figure 19 is for upgrading Ttrig to Ttrig ' and Ttrig in instantiation of the present invention " the switching stability and the comparison schematic diagram of the switching stability of conventional method.Wherein, conventional method is meant all measuring objects of wheel flow measurement serving BS configuration, and uses fixing measurement report observing time (Ttrig).Instantiation of the present invention is that the measuring object that signal strength signal intensity is relatively poor is removed, the Ttrig time delay of saving is used for prolonging Ttrig, and remove Ttrig by preceding, for the invalid unit measurement period of the measuring object of this Ttrig correspondence, send measurement report in advance.

Find out from simulation result, after triggering the measurement report trigger event at certain measuring object, instantiation of the present invention has strengthened the measuring frequency of this measuring object, thereby improved the accuracy of measurement result, made serving BS to select reliable target BS better according to measurement report.Therefore, after the user switches to the target BS of selecting by the way, can not take place within the short time to switch once more, thereby improve the stability of switching, reduce unnecessary switching, also reduced user's break period, improve user throughput and user satisfaction.

Figure 20 upgrades Ttrig to Ttrig after removing measuring object in instantiation of the present invention " ' after the measurement report time delay and the comparison schematic diagram of the measurement report time delay of conventional method.In Figure 20, instantiation of the present invention is to remove the relatively poor measuring object of signal strength signal intensity, and the Ttrig time delay of saving is used for reducing the measurement report time delay, and removes Ttrig by preceding invalid unit measurement period, sends measurement report in advance.As can be seen and conventional method compare, instantiation of the present invention has reduced the measurement report time delay to a greater degree, guarantees that the user in time switches.

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 instantiation of the present invention and the conventional method, and these two different measuring objects are meant two different frequencies.In Figure 21, instantiation of the present invention is that the measuring object that signal strength signal intensity is relatively poor is removed, make the measurement of measuring object preferably of two signal strength signal intensities reduce at interval, thereby reduce the time interval that two Ttrig trigger, finally reduce the transmission time interval of two measurement reports.

Under the situation in the time interval that reduces by two measurement reports arrival serving BSs, when serving BS is received the measurement report of cell1 (F1), may also send the handover execution command that comprises cell2 (F2) to the user.So, serving BS will be made once more and be switched decision, select cell1 (F1) as target BS, and send the handover cancelling order for cell2 (F2), inform that in time cell2 (F2) user will not switch to it.That is to say that before the serving BS transmission comprised the handover execution command of cell2 (F2), this time switching just had been cancelled.Simultaneously, serving BS sends the handoff request order for cell1 (F1), is exactly afterwards to switch processes such as preparation and switching execution.

As can be seen,, can guarantee that the user can switch to best target BS, the user is connected with best target BS always, thereby avoid occurring problem shown in Figure 9, the raising customers' satisfaction level by reducing the time interval of measurement report.

The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

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

2. method according to claim 1 is characterized in that, described one or more measuring object of removing from described first object set comprises:

Object is set 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 is characterized in that, described object is removed trigger event and is: Mm+Hys＜Threshold, wherein M is the measurement result of measuring object, Hys is sluggish coefficient, and Threshold is a threshold value, and subscript m is represented a measuring object in first object set;

6. according to each described method of claim 2-5, it is characterized in that, further comprise:

7. method according to claim 1 is characterized in that, the described unit measurement period of removing measuring object is reallocated comprises:

8. method according to claim 1 is characterized in that, the described unit measurement period of removing measuring object is reallocated comprises: user terminal is set to the measurement period dormancy in described unit.

9. method according to claim 1 is characterized in that, the described unit measurement period of removing measuring object is reallocated comprises:

10. method according to claim 1 is characterized in that, the described unit measurement period of removing measuring object is reallocated comprises:

11., it is characterized in that described monitoring situation according to the measurement report trigger event is sent measurement report and comprised according to claim 9 or 10 described methods:

12., it is characterized in that described monitoring situation according to the measurement report trigger event is sent measurement report and comprised according to claim 9 or 10 described methods:

13. method according to claim 12 is characterized in that, described monitoring situation according to the measurement report trigger event is sent measurement report and is comprised:

14. method according to claim 1 is characterized in that, further comprises: when determining that default recovery condition satisfies, recover measurement to the signal strength signal intensity of removing measuring object.

15. method according to claim 14 is characterized in that, describedly determines that default recovery condition satisfies and comprises:

16. according to claim 1-5,7-10, each described method of 13-15, it is characterized in that, describedly determine that first object set that comprises one or more measuring object comprises:

17. according to claim 1-5,7-10, each described method of 13-15, it is characterized in that, describedly determine that first object set that comprises one or more measuring object comprises: user terminal is searched for different carrier frequency or access way, detected carrier frequency or access way as measuring object, are increased in first object set.

18. according to claim 1-5,7-10, each described method of 13-15, it is characterized in that, describedly determine that first object set that comprises one or more measuring object comprises:

19. according to claim 1-5,7-10, each described method of 13-15, it is characterized in that, measuring object in described first object set is different with the carrier frequency that described serving BS uses, and the measuring object in perhaps described first object set is different with the access way that described serving BS uses.

20. a user terminal is characterized in that, comprising:

21. terminal according to claim 20 is characterized in that, described object control unit comprises:

22. terminal according to claim 21, it is characterized in that, described object is removed module and is used for: object is set removes observing time, after monitoring described object removal trigger event, start this object at measuring object to be removed and remove observing time, and described object removed distribute to this in observing time and wait that all unit measurement period of removing measuring object monitor; Remove trigger event if can both monitor described object, after described object is removed end observing time, stop to measure measuring object described to be removed, measuring object described to be removed is become remove measuring object in described all unit measurement period.

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

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

25. according to each described terminal of claim 20-24, it is characterized in that described object control unit further comprises: object recovers module, is used for recovering the measurement to the signal strength signal intensity of removing measuring object when determining that default recovery condition satisfies.

26., it is characterized in that described parameter storage unit is used to preserve the measurement configuration that serving BS provides according to each described terminal of claim 20-24, described measurement configuration is used to specify first object set that comprises one or more measuring object.

27. according to each described terminal of claim 20-24, it is characterized in that, described measurement performance element is further used for different carrier frequency or access way are searched for, and with detected carrier frequency or access way as measuring object, be increased in first object set that described parameter storage unit preserves.