CN102711168B

CN102711168B - Mobile terminal, network entity and relevant method thereof

Info

Publication number: CN102711168B
Application number: CN201210175314.6A
Authority: CN
Inventors: 约翰·约翰松; 大卫·山德伯瑞; 亨里克·奥鲁佛松
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2007-10-26
Filing date: 2007-10-26
Publication date: 2015-02-04
Anticipated expiration: 2027-10-26
Also published as: CN102711168A

Abstract

The invention provides a mobile terminal, which is used in at least one cellular radio network with a switching function. The mobile terminal comprises a reporting function which is used for transmitting a report to the at least one cellular radio network when the communication between the mobile terminal and a radio base station belonging to the at least one cellular radio network is failed, wherein the report comprises the information about the fault event, and the mobile terminal is characterized in that the report comprises the fault event history tracing to at least one success event from the fault event, and at least one success event which is about the communication between the mobile terminal and one radio base station belonging to the at least one cellular radio network, and the at least one success event occurs before the fault event history. The invention also relates to a network entity and an information management method.

Description

Mobile terminal, network entity and correlation technique thereof

Technical field

The present invention relates to field of telecommunications; And more particularly, relate to a kind of mobile terminal, for at least one cellular radio network of tool handoff functionality, described mobile terminal comprises function of reporting, described function of reporting is used for the communication broke down event between described mobile terminal and the radio base station belonging at least one cellular radio network described, send report at least one cellular radio network described, described report is at least containing the information about described event of failure.The invention still further relates to a kind of network entity at least one cellular radio network, and the approaches to IM at least one cellular radio network.

Background technology

Self-organizing network (Self-organising network, SON) is regarded as the instrument realizing the deployment of cheaper mobile radio telephone network, and when new radio net technology, is regarded as the instrument of the better acceptance realizing those technology.Yes can sell these new network technologies better for desired final result.

Self-organizing network is the generic term representing the functions such as automatic planning, configuration, optimization, maintenance, interruption compensation.

The theme of subject application is in the SON field of the Automatic Optimal of radio access.

Radio net performance is statistically in essence.Subscriber equipment (UE) (also referred to as the mobile terminal) that use different path to enter another community from a cell row may experience diverse radio condition.It is a lot of and cause sizable cross jamming that UE may experience little area overlapping, and another UE may experience the coverage hole (coverage hole) between community.Never anticipation network has the coverage rate of 100.0%, and the coverage rate of 100.0% is impossible, but will lack, such as, within 95% of community, by the cell edge bit rate that the bit rate > of realization plans.Similarly, all properties requirement to radio access network is stated with statistically term.

Usually pass through (such as, every 15 minutes) termly and observe network performance from network element collection statistics, and carry out post-processed to produce concentrated performance indicator for described network.Statistics counter counts event usually, or increases progressively based on a certain realized performance rate during the cycle sometime, etc.Statistics counter is also called as performance measurement (Performance Measurement, pm) counter or performance indicator.

Carrying out counting to the absolute number of event of failure is not the good measure that this fault becomes problem in a radio network usually.Because radio net is not that perfectly so usually there will be in a radio network many " problem ", but occurrence rate is lower.In many cases, counting the failure rate drawn needs to associate relevant with total traffic intensity in a certain manner, and must compare about the threshold value that can accept fault level to relevant, to determine whether this particular case should be optimized.

Therefore, for the optimized algorithm of radio access using Using statistics data counter as input (may according to above-mentioned paragraph through preliminary treatment), to determine the need of optimization, optimize what (which configuration parameter will add/remove/changes), to change parameter (increase, reduce), change how much (step-length) in which way.

The possibility of result of the Optimal Decision-making of optimized algorithm is by network configuration parameters new for application, and/or also has new measurement configuration, to obtain excessive data and statistics from radio access network or UE.

Optimizing process is a control loop, and it can optionally or soon or slowly be restrained, or may restrain not at all.Assuming that optimized algorithm is with time scale: minute-hour-work in week.

In this application, statistics counter is called as " pm counter ".Hypothetical network maintains described pm counter, and pm counter can only increase progressively, thus counts event according to various standard.The feature of pm counter increases progressively standard dividing by it.

In this application, terms user equipment (UE) and mobile terminal are used interchangeably.

In this application, use term to switch sensitivity (HO sensitivity) and indicate the comparable trend or sensitivity or possibility that carry out switching, namely meet the trigger criteria of trigger to start the statistical likelihood measured, make measurement report, make handover decisions.

In this document, also idle pulley is covered in this concept, i.e. HO sensitivity=idle mode cell gravity treatment sensitivity, namely meet the trigger criteria of trigger to start to measure and make the statistical likelihood of cell reselection decisions.

For same situation frequently, affect the mainly same mobility offset parameter frequently of HO sensitivity, the skew of applying when from community A to community B can be configured such that community B has precedence over other communities all, namely HO sensitivity is increased, to the actual wireless electrical measured value of adding to community B be offset when comparing which Shi Qiang community, or can opposite way configuration skew, the radio measurements of Ji Congdui community B derives skew, and reduce the priority of community B, namely reduce HO sensitivity.

Except skew, other also may be had to change the parameter of HO sensitivity, such as hysteresis timer, during described timer, do not allow UE turn back to its from community.If timer increases, so HO sensitivity reduces.If timer reduces, so HO sensitivity increases.

For other situation, such as between alien frequencies/RAT, still have other parameter can affect HO sensitivity, such as possibility presence service cellular standards, to start based on other frequency or other radio access technologies (Radio Access Technology, RAT) UE measures, and namely UE can not start the measurement based on other frequency/RAT before serving cell quality/signal strength signal intensity/received power drops to lower than a certain threshold value.If this threshold value increases (probably triggering), so HO sensitivity increases, and if this threshold value reduces (unlikely triggering), so HO sensitivity reduction.

Other parameter (parameter in such as, following mobile system) also may affect HO sensitivity according to intention expressed in these chapters and sections certainly.

Prior art

The content should measure, reported and when carry out measuring and reporting to be among the core decision-making of the design of self-organizing network.As the prior art of subject application, can mention with Publication about Document.

3GPP R2-072432: this document proposes: for the object of self-optimizing network (SON), should carry out the Radio Measurement to pilot channel, and be reported to network by UE (subscriber equipment or mobile terminal).These reports are triggered by following situation: i) fault, ii) if throughput is lower than threshold value, iii) by the clearly triggering from SON server, or iv) when UE enters predefined geographic area.In addition, the position of measurement can be pointed out by cell i d, GPS and/or round trip cycle measured value.The triggering reason of measurement and the time stamp of record is also proposed to be included in report.

3GPP R2-072725 proposes radio base station should produce some measured values, comprise: the number of the switching from cell-of-origin to Target cell triggered, the number of completed switching from cell-of-origin to Target cell and Radio Link Failure (Radio Link Failure, RLF) number (counting based on to wireless heterogeneous networks (RadioResource Control, the RRC) connection request risen because of " Radio Link Failure ").These measurements are intended to find out UE and where " occur suddenly " after experience Radio Link Failure.Use described result tuning: via RRC relaying neighbouring relations, be configured in for setting up and internuncial relation of other base station in radio base station, and be configured in the relation for interference coordination in radio base station.

3GPP TS 36.300 V8.2.0 mentions that UE reports the identity of old Serving cell when can access community after RLF.

But the experience of self-organizing network mixes.Not an easy task for Designing of ad hoc network is a kind of by the scheme taking into account how different as far as possible problem scenes.Even if above-mentioned prior art may be useful in some scenes, also always there is room for improvement.The problem relevant with building self-organizing network is complicated: must determine what to be measured, how to measure and when measure, and then will what be reported, remember how to use the information collected simultaneously.

Summary of the invention

Target of the present invention is the scheme proposing a kind of solution of the problem to prior art or the problem of minimizing prior art.Therefore, main target is to provide a kind of mobile terminal allowing the self-organizing network had through improving characteristic.

According to the present invention, this target realizes in the mobile terminal of at least one cellular radio network for tool handoff functionality, this mobile terminal comprises function of reporting, this report function is used for the communication broke down event between this mobile terminal and the radio base station belonging to this at least one cellular radio network, send report to this at least one cellular radio network, this report at least comprises the information about this event of failure.The difference of this mobile terminal is, this report function, for sending this report, makes this report contain historical record, and this historical record comprises:

-occur in another former event of failure of this event of failure and at least one success events, this success events is about the communication between this mobile terminal and the radio base station belonging to this at least one cellular radio network, and this at least one success events occurred before the historical record of this another event of failure.

The present invention proposes another kind of mobile terminal, for having at least one cellular radio network of handoff functionality, this mobile terminal comprises function of reporting, this report function is used for the communication failure event between described mobile terminal and the radio base station belonging to this at least one cellular radio network, report is sent to this at least one cellular radio network, this report at least comprises the information about this event of failure, and this report function makes this report comprise for sending this report:

The event of failure of at least one success events is traced back to by this event of failure, and the history of described event of failure comprises at least one success events described, this success events is about the communication between this mobile terminal and the radio base station belonging to this at least one cellular radio network, and this at least one success events occurred before this event of failure history.

Main concept of the present invention is the historical record of the event providing this mobile terminal to experience in from the report of mobile terminal.This historical record comprises any event of failure up to now and comprises at least one success events.This and prior art are formed and contrast, and prior art only reports event of failure on single basis, and in unlike the present invention, report potential whole event chain.Key benefit is: according to the present invention, can complete the scene of real generation situation on mobile terminals according to fault chain (such as access attempts).Compare, prior art only provides the diagnosis to irregular working network according to being compiled into the pure statistic evidence in statistical measurements of collected single failure.The invention provides one and how visual angle is on earth seemed to event chain.This makes it possible to understand this network better, and the tuning decision-making after the acquisition more information therefore must made with self-organizing network server.

According to the present invention, respectively by the problem solving or reduce prior art for the approaches to IM (there is the feature of claim 16 and 24 respectively) in the network entity of at least one cellular radio network and at least one cellular radio network.

Dependent claims discloses further favourable aspect of the present invention.

Accompanying drawing explanation

Referring now to accompanying drawing, demonstration embodiments of the invention are described, wherein:

Fig. 1 schematically illustrates mobile terminal of the present invention and multiple network entity;

Fig. 2 illustrates the block diagram of the embodiment of the inventive method.

Embodiment

Major function in subject application is how Lookup protocol, adjustment and optimization mobility parameters.According to the state of the art in active wireless network, this optimum configurations of major part manually carries out, and inevitable with much work.

The situation that the present invention pays close attention to is with frequency mobility (Intra-frequency mobility) situation.Appear on cell edge with frequency mobility.

Some problems that activity pattern (active mode) may occur when switching are such as:

The HO (switching) arriving neighbor cell is triggered too early.UE (subscriber equipment) may experience access fault in Target cell, or in Target cell, experiences RLF (Radio Link Failure) soon after HO, or UE again may switch from Target cell immediately after HO.

The HO arriving complete inappropriate neighbor cell is triggered, and such as remote community " infiltration " is in current area, such as, on bridge.

The HO arriving neighbor cell is triggered excessively evening.UE before receiving HO order, or even before transmission measurement report, may experience RLF in cell-of-origin.

Radio coverage hole may be there is.UE before any measurement report of transmission, may experience RLF in cell-of-origin, or UE will transmit the measurement report triggering HO between alien frequencies (Inter-frequency) or RAT.

Corresponding problem may occur during cell reselection under idle pulley (idle mode), and supposition uses same or similar mobility to configure under idle pulley and activity pattern, makes the conclusion from drawing the observation of active mode mobility also can be applicable to idle mode mobility.

Prior art proposes, for the object of SON, should carry out and report, be triggered by fault, and position is pointed out by cell i d, GPS and/or round trip cycle measured value to the Radio Measurement of pilot channel.The time stamp of triggering reason and the record measured also is proposed.

Prior art cannot process following various problems scene:

, wherein there is access fault, i.e. " HO is triggered too early " and " HO is to inappropriate community " problem scenes in Target cell in HO fault scenes.Under this scene, first UE will be switched to a community, and the access in this community is unsuccessful.UE then may re-establish in the 3rd community.

Repeatedly switching fast in problematic radio scene, with failure scenarios or may even successfully to come to an end.If successful twice HO quickly occurs in mode one by one, so network can detect this situation.If relate to more than 2 times HO, if or event chain come to an end with RLF in the 3rd community, so network cannot detect this situation, except non-tracking UE (follow the tracks of UE and will spend ample resources, and be only possible concerning the selected UE of unusual minority).

In these scenes, because beginning community is the non-primary cell for optimizing mobility parameters, so importantly will know UE starts this event chain in which community.These events probably start with the successful HO cutting improper community, and wherein radio condition worsens as quick as thought, even may cannot switchback because piping off, etc.

It is also important that and will know whether event occurs at same apparent position.

Key area branch: in order to know problem in which community starts, UE must can report the complete history of mobility event, comprises success events, instead of only report a specific fault of the triggering reason as Radio Measurement.

Diacritical point: as in prior art the position that GPS, RTT community ID etc. is used for that proposes determine to make the method that two different measuring values are relevant, support too consumes resources in each UE (GPS), or too inaccurate (community ID/RTT).From mobility viewpoint, absolute position determines it is unwanted, but needs the relative position between mobility event to determine.The most effective means done like this is: according to the proposal in subject application, carry out the association in time between mobility event.Prior art proposes the time stamp of " record " radio measurements.Although other method also meets these requirements, time stamp can provide required time related information really, time stamp need be applied to each in each event, instead of only be applied to Radio Measurement occasion.And window when likely should carry out bi-directional scaling time correlation according to the speed of UE, to use this information in the mode geared to actual circumstances.

Prior art proposes will be reported to the radio measurements of network, as the main foundation of the conclusion of the applicability drawn about a certain community.

This proposal is good all not from many angles:

Radio measurements is measured and filtration in quite short special time.For the object of configuration mobility parameters, main purpose finds out and identifies the community (such as, bridge/indoor-outdoor community) of the radio environment for complexity.In this type of environment, the community being measured as " by force " a moment may be found due to longer distance at subsequent time and have disabled up link, or may worsen as quick as thought.In fact, these special scenes that inappropriate community may be measured as " well " need the reason of blacklist or white list (a kind of neighbor cell list) exactly.There is several neighbor cell list:

Blacklist-indicate other community that should not use when UE is in current specific cell/consider.

White list 1-indicate other community that should use when UE is in current specific cell/consider.

White list 2-indicate can use/consider/preferably other community when UE is in current specific cell.

IRAT/IFREQ white list 0-indication carrier wave frequency and the radio access technologies be associated.

When the parameter of optimal control mobility behavior, the actual mobility behavior (i.e. the sequence of mobility event generation) observing UE may be more accurate; Instead of only observe radio measurements, it provides state snapshot, but may be the bad designator of real time dynamic mobile sexual behaviour.

The input that radio measurements can provide in some concrete scenes.But, consider only need list those communities meeting a certain threshold criteria, make UE report actual measurement to value waste transfer resource a little and bring post-processed complexity.

Key area branch: from the viewpoint of mobility configuration, the ability better proving the connection maintaining community therewith of cell suitability.Therefore, not only based on radio measurements, but the standard of conclusion and pm counter increment is obtained based on successfully reconstruction (success=can connect in maintenance within the time of Measuring Time), be than only obtaining the much better and more sane method of applicability conclusion based on Radio Measurement snapshot.

Key area branch: in order to clearly distinguish covering problem and mobility allocation problem, Radio Measurement is inadequate, but also need to observe real mobility behavior, namely need the historical record of mobility event.

Secondary sections branch: in order to effectively utilize Radio Measurement, more effective is carry out the first post-processing steps in UE, and only report meets the community of a certain standard.

Prior art does not really propose how to know UE whether on cell edge between cells, namely whether avoids this fault by the configuration of amendment mobility.

Key area branch: UE cell edge between cells is likely guessed from radio measurements, but it is more accurate to pass through to judge to know that UE is in mobility cell edge (HO is triggered at this place) meeting according to the mobility event betiding same apparent position (in same window for the moment) place.

Prior art does not consider how to be mapped in statistical parameter by UE measured value at all.

Key area branch: this proposal comprises and how to be effectively mapped in available statistical parameter by UE measured value, can be used as the input of SON decision-making.

In a word, the application proposes when rebuilding (re-establishment), and UE should be reported in nearest multiple Serving cell and attempt the historical record of the multiple mobility events in other multiple community of access.

Be called as " historical records of the multiple mobility events in multiple communities of access recently " after this historical record or be called for short " historical record ".

Propose further in this application after a while how this mobility event historical record of decipher, how to be mapped in statistics pm counter, and how these counters of decipher, to optimize switchings (HO) sensitivity and neighbor cell list configures.

Main purpose is by observing the time-correlating events occurred in different districts, by reaching a conclusion based on historical record, clearly identifies the reconstruction on the cell edge that betides between different districts and connectivity problem.When UE moves between cells, the behavior of mobility parameters control UE, and only have the cell edge region between community to be paid close attention to.Connect fault and rebuild and can occur at Intra-cell, such as: UE is from cell coverage area out and when returning wherein (such as, owing to moving in basement), but from the angle of mobility parameters, this situation is not paid close attention to.

Another main purpose observes approximate betide the event (that is, when fault occurs in one cell) of same position and reach a conclusion according to this event, to find out the possible suitable cell be at this same position in coverage.If these suitable cells can be found, so originally may by avoiding this fault through the better mobility parameters optimized.If suitable community cannot be detected at the apparent position of fault at all, so natively cannot avoid this fault by optimizing mobility parameters, but should cell coverage area be optimized.

Make the report mobility event betided in multiple community (>1) become a possible key benefit to be: for a) immediately RLF occurring in Target cell after HO, or access fault b) in Target cell, or c) repeatedly access fault, no matter which community UE is reconstructed into, all likely and the UE behavior pattern that " HO is triggered too early " and " arriving the HO of improper community " problem scenes experiences easily detected, and clearly the cell-of-origin of identification problem origin.And this report can contribute to the adjacent area identifying inappropriate adjacent area (too far away or too of short duration, to have high failure strength when being used as the mobility adjacent area of certain other community) and pipe off mistakenly.

The key benefit of time correlation is that it can provide relative position instruction (same position instruction) quite accurately, and implements in a very simplified manner simultaneously.

Therefore, the present invention relates to a kind of UE or mobile terminal in the ordinary course of things, for having at least one cellular radio network of handoff functionality, this mobile terminal comprises function of reporting, this report function is used for the communication broke down event between this mobile terminal and the radio base station belonging to this at least one cellular radio network, send report to this at least one cellular radio network, this report is at least containing the information about this event of failure.The difference of this mobile terminal is, this report function, for sending this report, makes this report comprise historical record, and this historical record comprises:

Occur in another event of failure before this event of failure and at least one success events, this success events is about the communication between this mobile terminal and the radio base station belonging to this at least one cellular radio network, and this at least one success events occurred before the historical record of this another event of failure.

As another kind of execution mode, the invention provides a kind of mobile terminal, for having at least one cellular radio network of handoff functionality, this mobile terminal comprises function of reporting, this report function is used for the communication failure event between described mobile terminal and the radio base station belonging to this at least one cellular radio network, report is sent to this at least one cellular radio network, this report at least comprises the information about this event of failure, and this report function makes this report comprise for sending this report:

The schematic illustrations according to mobile terminal 2 of the present invention is described in Fig. 1.

As fallen obviously from the preceding paragraph, mobile terminal according to the present invention is intended to one or more cellular radio network for having handoff functionality.The example of these networks is GSM, UMTS, and even can expect WIFI network in principle, if it possesses the applicable function for the treatment of switching.Certainly following radio net also can be expected.

The function of reporting of mobile terminal can be implemented by means of software in microprocessor in the terminal.But, function of reporting can be embodied as the set of more than one physical unit.In addition, it needs not to be microprocessor, but can be any electric installation with essential feature, such as, can use FPGA circuit, ASIC or event lump electronic building brick.When needs function of reporting sends or receives report, it carries out this operation by being incorporated to the hardware (such as radio transmitter/receiver) be necessary.

As expansion, mobile terminal can possess make that historical record can be relevant with specific geographical area functional.This, by making this report function for sending this report to realize, makes this report contain:

The historical record of another event of failure occurred in the first geographic area that mobile terminal has occurred and at least one success events.

In this way, historical record can be placed in geographically hereinafter, and therefore historical record can be used for the fault in the specific geographical area of searching cellular radio network.

Many kinds are had to determine the first geographic area.For example, the function of reporting of mobile terminal can be used for this first geographic area to be defined as the already present region of mobile terminal during a period of time window.

During use, window is a kind of mode simply historical record of the event in report being limited to event in a geographic area.This geographic area is the region (if mobile terminal is kept in motion) that mobile terminal has been advanced wherein during window at this time.Benefit is that the method do not need may costly and the navigation system of power consumption, such as GPS (global positioning system).

Therefore, the application proposes the mobility event in historical record to carry out relative time between corresponding radio measurements/list or possible Target cell relevant.In most of the cases, need to make event in general one and samely will pay close attention to geographical position relevant (the conclusion being applicable to mobility and optimizing can be drawn).In many cases, entry needs relevant to reconstructed positions.

In addition, this report function can be used for according to the speed bi-directional scaling of this mobile terminal this time window.Therefore, when window determines the first geographic area in use, the actual size of geographic area can be made not rely on the gait of march of this mobile terminal.

For this speed having this report function many modes to estimate this mobile terminal for the object of report.For example, any one in following program can be used: Doppler measurement, cell change rate, network connect, area type.

Therefore, propose further to be used for that relative time is correlated with time window can according to the speed bi-directional scaling of UE:

Wherein the speed of UE can be estimated based on L1 Doppler measurement or cell change rate etc. by UE itself, and is contained in UE report,

Or it can by network-evaluated in the community that this is rebuild of UE,

Or it by sending signal to UE on the broadcast channel of community, by providing cell-specific time correlation timer clearly, the area type (namely highway community is to indoor cell, supermarket) according to MPS process indicates non-permanently.

In this way, can realize determining based on the same position accurately of time correlation for high speed UE and low speed UE.

Proposition likely should limit the time window of the entry in UE storage and report history record, and namely UE does not need to report the entry more Zao than time X.

In the simplest possibility embodiment, this can be used as main time related mechanism.X can be arranged enough short, therefore can guarantee to be correlated with in the position that all reported entries are identical with reconstructed positions all roughly.This represents the simplest and the time correlation mode that dynamic is minimum.

In other cases, still need similar rule, therefore UE can abandon entry comparatively early based on clear and definite rule, and therefore saves storage space.

According to above, proposing further can according to the speed bi-directional scaling time cycle X of UE.

As an alternative, this report function can be used for estimating to determine this first geographic area by geographical position.This estimation can be performed, as above-detailed by GPS.

According to the present invention, the event of failure that mobile terminal is reported can be an event in the group of the following composition: access fault, Radio Link Failure.

Propose for access fault, UE can provide the extraneous information of event of failure.

In particular, the access failure cause proposing clearly to indicate can be:

" high capacity/multiple conflict ".

The meaning of this reason will be: conflict detected, or detect that basic reason is assumed to high capacity without surplus resources to proceed joining procedure.Also can comprise other mark of high capacity.When network has responded to access attempts and indicated high capacity/backward command in the response clearly, this reason can be used.

" do not observe response message " at all.

The meaning of this reason will be: do not see response message (not for any UE) at all.For LTE, this can be used as the instruction gone wrong.Supposition for LTE is: for access response message, carry out addressing UE with a shared address, this shared address by wait to all UE of the response at the access attempts of making sometime use.

" for non-competing resources measurement to conflict ".

If other clear and definite reason is all inapplicable, so suppose that radio coverage is subject matter.Or, can indicate clearly " radio reason ".

At least one pm counter that the application proposes to be used for community increases progressively because of access fault, owing to " radio reason " or any reason that other specifically indicates.

About reported success events, it can be any event from the group be made up of the following: this mobile terminal leaves this community in the normal fashion after being successfully connected to a community; This mobile terminal leaves this community in the normal fashion after successfully adhering on one cell; This mobile terminal successfully accesses a community to rebuild; This mobile terminal successfully maintains the communication link with a community.

Many possible interpolations can be made to the report sent from mobile terminal according to the present invention.For example, function of reporting is used in this report the list of the Target cell providing available.

According to the proposal in prior art and in the literature, assuming that UE can directly in the community of its reconstruction together with the list of historical record report radio measured value or possible Target cell.This will be the simplest principle, and can dispose all situations.

Preferably, for the object of the literature, UE should not need to carry out extra concrete Radio Measurement.If it will be preferred that UE can only store with the triggering of store measurement values maximally related mobility measurements value.But, the requirement that some are new may be introduced.

In any case assuming that be that the normal mobility that originally all must do based on UE is measured by the Radio Measurement being used for the object of the literature.In particular, measure type can be received signal strength indicator symbol (RSSI), Reference Signal Received Power (RSRP, CPICH RSCP ...), Reference Signal Received Quality (RSRQ, CPICH Ec/Io ...).

Function of reporting can be further used for filtering out by the threshold value of application cell quality parameter the list that the extraneous community defined in this threshold value produces this possible Target cell.

In order to produce possibility target cell list, propose that UE can apply one or more threshold values to filter out the entity that the measures community higher than (or lower than) this threshold value, this measured value will be saved, and be reported with the list of the community of access recently.This list can be regarded as may target cell list.

UE then can only report " can compatibly receive " community, this community is paid close attention to community.In this way, post-processed can be simplified, can avoid reporting actual measured value, and reported list can be condensed into shorter list.

This threshold value can be changed by the current region of this report function occupied by this mobile terminal.

Proposing threshold value to be applied in the different areas can be different, and it dynamically configures in UE.

The definition " suitably received " can be different in zones of different, because network can have different planning cell edge bit rate in the different areas.By measured value and threshold value (being different from for the threshold value required by " in coverage ") are compared, gained pm counter can:

-provide stronger statistic evidence for some problem.

-possibility be optimized projecting parameter (such as, planning cell edge bit rate) is provided, and not only for " in coverage "/" outer in coverage " problem.

Function of reporting also can be used for providing this possibility target cell list with the sequence of the value of this cell quality parameter.Therefore, proposing possibility target cell list further should relative to measurement quantity with descending/ascending sort.In this way, such as, likely statistical disposition is carried out to " the best " community, and any extra measurement report expense can not be caused.

According to the present invention, in order to limit the size of report, this report function can be used for should from the requirement of this at least one cellular radio network reporting cell measured value.

Therefore, these measured values are reported in the requirement that proposal UE should carry out automatic network, connect network in setting program can indicate whether to need this to report at RRC.In addition, UE should not need directly to carry out extra measurement, except non-network indicates so after reconstruction.In this way, unwanted measurement report can be avoided.

Or, propose the Cell Site Controller of UE reconstruction (such as, Node B) come to ask nearest mobility measurements report from nearest Serving cell controller (such as, Node B) by minizone controller signaling (such as EUTRA X2 interface).[prior art: having proposed nearest mobility measurements report can forward via X2 when switching and preparing, but problem is when breaking down, and UE can rebuild at another community place not yet receiving this information].

In particular, relying on network-reporting to measure instead of allowing UE report to mean for general mobility measurements, UE can not only report for ambulant event measurement report, the such as identity of " Xin Qiang community " event and cell-of-origin thereof, but the information that UE will need report more complete, the such as actual measured value of all communities detected, or complete possible target cell list.In order to ensure using the measurement report that the network of mobility SON uses this more complete, proposing that the pattern of measurement report can be and can be configured by O & M further.

In this way, UE may omit the report to actual wireless electrical measurement/possibility target cell list.UE will only need report history record.

This can be used as the mode of the more measurement data of acquisition, and one may have problem area for some, and does not force UE to store the mode of more measurement results.

If rebuild the community communicated to be put on the blacklist in early days at this historical record in window at this time with this mobile terminal, so this report function also can be used for reporting for this community.Therefore, the community be put on the blacklist in the community that UE also can be included in current area or in historical record in available targets cell report or measurement report is proposed.If comprise these communities, so should them be indicated clearly to be put on the blacklist, and they be put on the blacklist in which community.

Can carry out in many ways the instruction of the community of listing blacklist: A) determine by specifying in specification and limiting UE behavior, such as UE only considers the blacklist of the nearest community in historical record, B) UE indicate clearly consider which blacklist.When may complete in the different districts in historical record list blacklist time, the community with discussed blacklist can be indicated clearly.

In this way, extra measurement is initiated in the community be likely put on the blacklist to these, and triggers the addition report to SON server.

UE may not comprise the community be put on the blacklist in for ambulant general Radio Measurement.When UE cannot to measure in order to efficiency the community that is put on the blacklist as normal mobility measure a part of time, the application propose can after the re-establishment/period may the time point place measurement community (community be put on the blacklist in last community) that be put on the blacklist first.This spontaneously can be started by UE, maybe should carry out the request of automatic network and initial.UE can remember which community is put on the blacklist in previous cells.

As the replacement scheme that UE indicating cell is put on the blacklist, the controller (Node B) of community, by being configured to make likely to sort to the measured value of the community be put on the blacklist in time rebuilding at UE, knows which community is put on the blacklist in neighbor cell.Therefore need to carry out signaling neighbor cell black list information by RAN signaling (LTE: via X2) or by O & M signaling.Consciously, likely should carry out these in window to measure when time correlation.

Also when without performance loss, the community be wrongly blacklisted can be indicated.

If proposed when time correlation in window, be all put on the blacklist in any community of the UE mobility event historical record of community in the community of access recently of successful reconstitution wherein, so this should by ad hoc report.In particular, reported this Ying Gai community is put on the blacklist in nearest Serving cell.

In this way, likely to the initial extra tracking of this UE and measurement.If UE keeps successfully being connected to this community within considerable time, so strong evidence (also see the chapters and sections about performance indicator) of being wrongly blacklisted of this Shi Gai community.

According to the present invention, depending on the position residing for report recipient, this report function can be used for being forwarded to another network node via the network node this report in this at least one cellular radio network.In this way, report can be transmitted to the recipient be associated with the network node being different from the network node that mobile terminal communicates just with it at present.

When recipient is associated with the network node of another cellular radio network node, function of reporting can be used for being transmitted to another cellular radio network node via the network node this report in this at least one cellular radio network.

Network entity

According to the present invention, the recipient of report can be any network entity, for at least one cellular radio network of tool handoff functionality, this network entity comprises function of reporting, this report function is used for the communication broke down event between mobile terminal and the radio base station belonging to this at least one cellular radio network, receive the report from this mobile terminal, this report is at least containing the information about this event of failure.The difference of this network entity is that this report function is for receiving this report, and wherein this report is containing following historical record:

-occurring in another former event of failure of described event of failure and at least one success events, this success events is about the communication between this mobile terminal and the radio base station belonging to this at least one cellular radio network.

As another kind of execution mode, the invention provides a kind of network entity, for having at least one cellular radio network of handoff functionality, this network entity comprises function of reporting, this report function is used for the communication failure event between mobile terminal and the radio base station belonging to this at least one cellular radio network, receive the report from this mobile terminal, this report at least comprises the information about this event of failure, this report function is for receiving this report, and wherein this report comprises:

The event of failure of at least one success events is traced back to by this event of failure, and the history of described event of failure comprises this at least one success events, this success events is about the communication between this mobile terminal and the radio base station belonging to this at least one cellular radio network, and this at least one success events occurred before this event of failure history.

The schematic illustrations according to network entity of the present invention is described in Fig. 1.

Should point out, the function of reporting of this network entity is not identical with the function of reporting of mobile terminal.But with regard to the function of reporting of network entity for receiving the report from mobile terminal, the function of reporting of this network entity is the corresponding function of the function of reporting of mobile terminal.About the physical embodiment of the function of reporting of network entity, it may be similar to the physical embodiment of the function of reporting of mobile terminal, see paragraph corresponding above.

As expansion, network entity can possess make that historical record can be relevant with specific geographical area functional.This is by making this report function for receiving this report to realize, and wherein this report contains:

The historical record of-another event of failure of having occurred in the first geographic area that mobile terminal has occurred and at least one success events.

As another expansion, network entity can be used for from the extra historical information of another network entity requests except the information that mobile terminal is reported, this another network entity identifies from the historical record that mobile terminal is reported, wherein this additional events information can contain:

The further historical record of-event of failure that occurred in the geographic area that mobile terminal has occurred and success events.

The further radio measurements that what the mobile terminal in-another community reported occur in this geographic area.

The benefit of the method is the ability increasing the longer event chain of process, and increase the amount of the radio measurement data of statistical disposition (to draw more detailed conclusion) of being ready to use in, and mobile terminal can not be increased the weight of must report the burden of the similar events in multiple community with identical measured value.

The function of reporting of network entity can be used for from this report to estimate at least one performance measurement counting device, and it indicates measuring of the performance of this at least one cellular radio network.

The application propose pm counter can based on occurring in multiple cells, same approximate position occur or in time correlation time window in the particular sequence of event that overlaps and increasing progressively.

The historical record of the mobility event in the community finally accessed and current reconstruction event is intended to for providing input parameter can maintain/increase progressively these pm counters.

These pm counters be intended that them by provide some to have in the process of the statistic evidence of problem scenes quite important, the problem scenes wherein depending on mobility parameters (such as offseting) can differentiate with the problem scenes caused mainly due to " truly " coverage hole.And the problem scenes solved by increasing HO sensitivity (HO should carry out in early days) should differentiate with by the problem scenes reducing HO sensitivity or even piped off completely some community (blacklisting: HO sensitivity=zero) solves.

SON algorithm will use these pm counters as input, and to how Reconfigurations parameter makes decisions to operate this network in better mode or proposes.

This at least one performance measurement counting device can be used as this mobile terminal experiences access fault the measuring of number of times due to following arbitrary reason: high capacity, do not observe any response for arbitrary mobile device, for non-competing resources measurement to conflicting, other reason.

Therefore, the application proposes that at least one the pm counter being used for community increases progressively because of " not receiving any response message " access fault of bringing at all.

The application proposes that at least one the pm counter being used for community increases progressively because of " for non-competing resources measurement to conflicting " the access fault brought.

The application proposes that at least one the pm counter being used for community increases progressively because of " high capacity/multiple conflict " access fault of bringing.

In particular, at least one pm counter that the application proposes to be used for community increases progressively because of the access fault brought of the set of " radio reason " (can indicate clearly) or other unknown communication questions and prospect.

The benefit of instruction specific reasons " high capacity/multiple conflict " and " for non-competing resources measurement to conflict " be that of avoiding failure cause and mobility or coverage configure have nothing to do time, mobility or coverage are configured and carry out wrong adjustment.

Instruction: the benefit of " at all not observing any response message " supports trouble shoot.If UE has the access information (it may be because such as access the community of mistake when having community ID and conflicting) of the mistake about accessing radio resources and/or access response addressing or radio resource, this definite behavior so can be expected.

Instruction ERROR ind: can be the configuration mismatch that can detect between Target cell and cell-of-origin to the benefit of conflicting for non-competing resources measurement.And, the switching postponed by abnormality likely detected.

Instruction: the benefit of " radio reason " to detect that UE is linked into community with poor radio condition.This arrives the switching of this community to be triggered too early or this community may be instruction concerning complete inappropriate Target cell the switching from cell-of-origin by being.

All above-mentioned instructions are all need statistic evidence and therefore need proposed pm counter to support " soft " problem designator of statistical analysis, wherein find the evidence of problem when pm counter and threshold value being compared.Likely pm counter also can be first relevant to always accessing intensity to form relative ratios.

In the literature, if do not stated separately, so when mentioning " access fault ", be meant to " the access fault " of reason=radio reason.

Another kind of possibility is that this at least one performance measurement counting device can be and experiences Radio Link Failure in one cell and the counting of the number of times rebuild in another community subsequently to this mobile terminal.

Therefore, the application proposes that at least one pm counter should based in window during in same approximate position or in the time correlation from RLF event, in a community, RLF occur and complete the standard of successful reconstitution in another community and increase progressively, this pm counter is applicable to this paired community and this another community.

Based on this pm counter, whether deducibility goes out UE may be switched to the community rebuilding and be done or do not complete.Assuming that UE will search for its Qiang community after RLF, and attempt being reconstructed into this Qiang community, any community that this counter also will provide whether there is UE and may being switched to when RLF, namely when HO is triggered in early days, whether may the instruction of the successful HO of executed.This is applicable to the mobility scene with frequently, between alien frequencies and RAT (radio access technologies).

By observing the high level higher than this at least one pm counter, likely make its to above this to the sum of the HO between community or and the sum or relevant with rebuilding the sum of RLF completed in this another community of RLF, and itself and threshold value are compared, likely/easily find out the statistic evidence of " HO is triggered excessively evening " problem scenes, and therefore draw and should change this comparatively early triggers HO to increase HO sensitivity conclusion to the mobility offset parameter between community.

If this another community is put on the blacklist in this community, so the high level of this pm counter above can be interpreted as the evidence blacklisted it as mistake.

Or, propose at least one pm counter should based on same approximate position or relative to RLF (before or after) time correlation time window in, in a community, RLF occurs and UE measures at least one other community (signal strength signal intensity, quality etc.) increases progressively higher than the standard of a certain threshold value, this pm counter is applicable to this paired community and this another community.

Except the observed result/benefit of aforementioned paragraphs, the threshold value of required threshold value that use is set higher than " in coverage ", such as the threshold value of planning cell edge bit rate will be mapped to, and carry out the statistical analysis that is similar to above, the more strong statistic evidence of " HO is triggered excessively evening " scene can be found, thus more clearly this problem and " true coverage hole " scene are differentiated, this, by likely making the step-length of the increase of HO sensitivity comparatively large, restrains quickly may make SON algorithm.

RLF → RE rebuilds (successfully keeping)

The application proposes that at least one pm counter should based in window during in same approximate position or in the time correlation from RLF event, there is RLF in a community and complete successful reconstitution in another community, and UE keeps successfully being connected to the standard of another community and increases progressively within a period of time, this pm counter is applicable to this paired community and this another community.

Or can count the relative standard of a upper standard, namely at least one pm counter should based in window during in same approximate position or in the time correlation from RLF event, there is RLF in a community and complete successful reconstitution in another community, and UE does not keep successfully being connected to another community (namely within a period of time, at this moment, there is second time to switch or RLF etc.) standard and increase, this pm counter is applicable to this paired community and this another community.

If this another community is put on the blacklist in this community, so the high level in a pm counter or the low value in a rear counter provide this to pipe off may be the evidence of mistake.

If this another community is put on the blacklist in this community, so the low value in a pm counter or the high level in a rear counter provide this to pipe off as correct evidence.

Increasing progressively of any one in above-mentioned two pm counters is likely only carried out above when this another community is put on the blacklist, namely indicate in the community of reconstruction unit in historical record based on UE and be put on the blacklist, or be put on the blacklist in which community this community above based on the configuration information instruction of Cell Site Controller (Node B).

Propose: similarly, this " successfully keep " can be increased progressively standard or " unsuccessful maintenance " relative standard is added to supplementing based on any one in the pm counter rebuild, to form new pm counter, wherein high/low counting provides community to be suitable as the more ample evidence of the ambulant Target cell from cell-of-origin.

HO → AF → reconstruction

Propose that at least one pm counter should based in window during in same approximate position or in the time correlation from AF event, access fault is there is in Target cell when HO after HO is triggered in cell-of-origin, and in arbitrary community, be then successfully completed reconstruction and increase progressively, this pm counter is applicable to this paired cell-of-origin and this Target cell.

Deducibility has UE can not be switched to the community with access fault, because obviously there is another community worked better (reconstruction community).

By observing the high level of at least one pm counter above-mentioned, likely make it relevant to the above-mentioned sum to the HO between community, and itself and threshold value are compared, this can be interpreted as the evidence of " HO is triggered too early " problem scenes, and therefore show that should change this more late triggers the conclusion arriving the HO of this Target cell above to the mobility parameters between community to reduce HO sensitivity.

Also can show that Target cell may be completely improper and be the conclusion of the candidate cell be put on the blacklist in cell-of-origin, if even if such as HO success rate is still lower equally after have adjusted mobility offset parameter, so Target cell can be piped off.

Or, propose that at least one pm counter should based in same approximate position or when the time correlation relevant with AF event in window, access fault is there is in Target cell after HO is triggered in cell-of-origin, and the community measured except this Target cell increases progressively higher than a certain threshold value (signal strength signal intensity, quality), this pm counter is applicable to this paired cell-of-origin and this Target cell.

Except the observation/benefit of aforementioned paragraphs, use the threshold value being set higher than required threshold value in coverage, such as the threshold value of planning cell edge bit rate will be mapped to, and carry out the statistical analysis that is similar to above, the more strong statistic evidence of " HO is triggered too early " scene and/or " Target cell is improper " can be found, thus more clearly this problem and " true coverage hole " scene are differentiated, this, by making the step-length of the reduction likely making HO sensitivity comparatively large, restrains quickly may make SON algorithm.The decision-making piped off this community can be made quickly.

At least one pm counter should be there is in proposal, this at least one pm counter is when the time correlation from the access fault in Target cell in window, when successful reconstitution in a certain community is followed after the handoff failure from cell-of-origin to Target cell, increase progressively when this successful reconstitution, wherein this pm counter is applicable to this paired a certain community and this cell-of-origin.

Height counting in above-mentioned pm counter may imply that this certain community is the suitable HO candidate cell of the UE in this cell-of-origin.Conclusion can be the HO sensitivity that should increase from cell-of-origin to Target cell.

If this community is put on the blacklist in this cell-of-origin above, the height counting so in this counter is that this pipes off as the strong evidence of mistake.

HO → HO →...→ AF → reconstruction

Propose that at least one pm counter should based in window during at same apparent position or in the time correlation from AF event, starting with the HO of the first cell-of-origin to first object community, the window internal trigger repeatedly after HO when time correlation, access fault is there is in community when HO, and in arbitrary community, be successfully completed reconstruction subsequently and increase progressively, this pm counter is applicable to this paired first cell-of-origin and this first object community.

This scene may seem impossible at first view, but considers and use SON algorithm to optimize mobility, and this may be optimized to 50% have problem area thus occur in the scene causing the community far away apart from first object community to be put on the blacklist existing.If not yet complete the blacklisting of the correspondence of rightabout (from the first cell-of-origin to first object community), so UE likely will be switched in remote community (first object community), and then this locality is switched to another remote community (due to blacklisting), but deducibility has UE should not be switched to the community with access fault, because obviously there is another community worked better (reconstruction community).Judge from the very fast sequence of HO, all middle cell seem it is not very suitable, and supposition basic reason is the HO in quick HO chain.

By observing the high level of this at least one pm counter above, likely make it to this is relevant to the sum of the HO between community above, and itself and threshold value are compared, the evidence of problem scenes that this can be interpreted as " triggering the HO arriving improper community ", and therefore draw and should change this to the mobility parameters between community to reduce HO sensitivity and more late or trigger the conclusion arriving the HO of this first object community above.Also can consider to pipe off completely.

The selection of the visual embodiment of network entity according to the present invention and implementing in diverse location in a network.For example, this network entity can be implemented in the arbitrary equipment of group carrying out free the following composition: the radio base station transceiver of this at least one cellular radio network, operation and management server.

Method of the present invention

The present invention also comprises a kind of method.The general type of the method is the approaches to IM at least one cellular radio network, and this at least one cellular radio network has handover functionality, and the method includes the steps of:

A) when for communication broke down event between the mobile terminal of this at least one cellular radio network and the radio base station belonging to this at least one cellular radio network, report is sent from this mobile terminal to this at least one cellular radio network, this report is at least containing the information about this event of failure

B) in the network entity of at least one cellular radio network for this with handoff functionality, receive this report from this mobile terminal.The difference of the method is step a): send this report to make this report historical record from mobile terminal, this historical record comprises: occur in another event of failure before described event of failure and at least one success events, described success events is about the communication between this mobile terminal and the radio base station belonging to this at least one cellular radio network.

As another kind of execution mode, the invention provides a kind of approaches to IM, at least one cellular radio network, this at least one cellular radio network has handoff functionality, and the method includes the steps of:

A) when for communication broke down event between the mobile terminal of this at least one cellular radio network and the radio base station belonging to this at least one cellular radio network, report is sent from this mobile terminal to this at least one cellular radio network, this report at least comprises the information about this event of failure

B) in the network entity of at least one cellular radio network for this with handoff functionality, receive this report from this mobile terminal,

Wherein, step a) in: send this report from mobile terminal and comprise to make this report: the history being traced back to the event of failure of at least one success events by this event of failure, and the history of described event of failure comprises this at least one success events, this success events is about the communication between this mobile terminal and the radio base station belonging to this at least one cellular radio network, and this at least one success events occurred before this event of failure history.

Describe the block diagram of the embodiment according to method of the present invention in Fig. 1, point out step a and step b.

As expansion, according to approaches to IM of the present invention can step a) in comprise: send this report with the historical record making this report contain another event of failure and any success events occurred in first geographic area occurred of this mobile terminal.

The literature proposes can drawing some pm counter feature crucial suitable conclusion and increasing progressively standard.

Also can calculate pm counter from other pm counter, some the pm counters in these other pm counters are called as KPI (key performance indicators), and other pm counter can through design to use in some algorithm.

In the literature, propose the UE data report for mobility configuration optimization and the pm counter increment standard be associated, namely UE does not directly report pm counter, but network maintains these pm counters based on the report from some/many UE.

The position of SON algorithm in centralization entity (such as O & M back-up system), maybe can be able to distribute in a network.Assuming that only SON entity implements the optimization of the mobility parameters of a community.

Pm counter and purposes in the method for the invention thereof may be numerous certainly.Below some examples.

Can comprise further according to approaches to IM of the present invention:

C) network entity is optionally from another network entity requests extraneous information, the early stage report of this extraneous information from this mobile terminal and the event of the early stage registration relevant with this mobile terminal,

D) at least one the pm counter increased progressively based on the standard drawn from step b and the information that optionally receives in step c is maintained.

Can comprise further according to approaches to IM of the present invention: this steps d) relate to based in same geographic area, there is Radio Link Failure in a community and in another community, complete the standard of successful reconstitution, and increasing progressively at least one pm counter, this pm counter is applicable to this paired community and this another community.

Can comprise further according to approaches to IM of the present invention: when being put on the blacklist in the community only mentioned in historical record in this another community, carry out increasing progressively of pm counter.

Can comprise further according to approaches to IM of the present invention: this steps d) relate to based in a geographic area, switch in cell-of-origin after being triggered and access fault occurs in Target cell, and in arbitrary community, be then successfully completed reconstruction and increase progressively at least one pm counter, this pm counter is applicable to this paired cell-of-origin and this Target cell.

Can comprise further according to approaches to IM of the present invention: this steps d) relate to based in a geographic area, switch in cell-of-origin after being triggered and access fault occurs in Target cell, and the some parameters measuring another community except Target cell are higher than a certain threshold value, and increasing progressively at least one pm counter, this pm counter is applicable to this paired cell-of-origin and this Target cell.This parameter can be: signal strength signal intensity, quality.

Can comprise further according to approaches to IM of the present invention: this steps d) relate in a geographic area, successful reconstitution in a certain community is followed after the handoff failure from cell-of-origin to Target cell, increase progressively at least one pm counter when this successful reconstitution, wherein this pm counter is applicable to this paired a certain community and this cell-of-origin.

Can comprise further according to approaches to IM of the present invention: this steps d) relate to based in same geographic area, beginning is being switched to first of first object community with the first cell-of-origin, repeatedly switch after being triggered, access fault is there is in the community switched, and then in arbitrary community, be successfully completed reconstruction, and increasing progressively at least one pm counter, this pm counter is applicable to this paired first cell-of-origin and this first object community.

Can comprise further according to approaches to IM of the present invention: for the pm counter relevant with the second community with the first community, wherein in order to increase progressively pm counter, mobile terminal must be met and be successfully connected to the additional criteria that this first community reaches the cycle sometime.

Can comprising further according to approaches to IM of the present invention: for the pm counter relevant with the second community with the first community, wherein in order to increase progressively pm counter, mobile terminal must be met and be successfully connected to the additional criteria that this second community reaches a certain duration.

Can comprising further according to approaches to IM of the present invention: for the pm counter relevant with the second community with the first community, wherein in order to increase progressively pm counter, must meet that mobile terminal is unsuccessful is connected to the additional criteria that this second community reaches a certain duration.

The historical record example of the mobility event in the community of nearest access is as follows:

Example 1

The historical record of the mobility event in the community of nearest access, comprises the radio measurements provided with threshold value form, can look like like this:

<CellID:current><event:access><timestamp:12.35.42.58>

<CellID:id1><event:RLF><timestamp:12.35.41.88>

<CellID:id2><event:Src cell leave><timestamp:12.35.40.02>

<CellID:id3><event:Src cell leave><timestamp:12.35.12.76>

<Rmeasurem:1><type:RSSI><threshold value:6.55><timestamp:12.35.43.00>

<CellID:id1>

<CellID:id3>

<CellID:id2>

<CellID:id8><Blacklisted in Cellid:id2>

<Rmeasurem:2><type:RSSI><threshold value:6.55><timestamp:12.35.39.80>

<CellID:id2>

<CellID:id3>

The application proposes to create the entry in the cell list of access recently for the event of following kind:

UE (such as, is triggered by the reception of switching command) in the normal fashion and leaves cell-of-origin/Serving cell.

UE detects Radio Link Failure (fault after the success communication in community).

UE detects access fault (fault before setting up communication link completely)

UE (successfully) accesses community to rebuild.This entry main cause is the crosscorrelation point in order to provide UE time reference, the sequential between event can be made clearly to be correlated with.These events are called as " mobility event " herein.

Indicate the benefit of HO to be to distinguish between the fault easily in Intra-cell and the fault on cell edge clearly, namely distinguish in the near future at HO.

When observing generation event in different districts (regardless of what) in window when shorter, identical differentiation can be carried out.

The application proposes likely when not measuring the community higher than a certain threshold value, and report has the radio measurement report (UE can report and which kind of has used measure type and threshold value) of zero entries.

In this way, situation when UE easily indicates UE to be in " truly " coverage hole.

Example 2

Without time stamp, window (clearly representing in this example) time only

<CellID:current><event:access><Blacklisted inCellID:id2>

<CellID:id1><event:AF><Reason:highload>

<CellID:id2><event:Src cell leave>

<CellID:id3><event:Src cell leave>

Claims

1. a mobile terminal, for having at least one cellular radio network of handoff functionality, described mobile terminal comprises function of reporting, described function of reporting is used for the communication failure event between described mobile terminal and the radio base station belonging at least one cellular radio network described, report is sent at least one cellular radio network described, described report at least comprises the information about described event of failure, the feature of described mobile terminal is, described function of reporting makes described report comprise for sending described report:

The event of failure of at least one success events is traced back to by described event of failure, and the history of described event of failure comprises at least one success events described, described success events is that at least one success events described occurred before described event of failure history about the communication between described mobile terminal and the radio base station belonging at least one cellular radio network described;

Wherein said event of failure is one of following event: access fault, Radio Link Failure.

2. mobile terminal according to claim 1, wherein said function of reporting makes described report comprise for sending described report:

Occur at least one success events in the first geographic area that described mobile terminal occurred.

3. mobile terminal according to claim 2, wherein said function of reporting is used for that described mobile terminal is appeared at one of them region within a timing window phase and is defined as described first geographic area.

4. mobile terminal according to claim 3, window when wherein said function of reporting is used for according to the speed bi-directional scaling of described mobile terminal.

5. mobile terminal according to claim 4, wherein said function of reporting is used for the described speed estimating described mobile terminal by means of any one process following: Doppler measurement, cell change rate, network connects, area type.

6. mobile terminal according to claim 2, wherein said function of reporting is used for estimating to determine described first geographic area by geographical position.

7. mobile terminal according to claim 1, wherein said success events is arbitrary situation of the following: described mobile terminal leaves this community in the normal fashion after being successfully connected to a community; Described mobile terminal leaves this community in the normal fashion after successfully adhering on one cell; Described mobile terminal successfully accesses a community to rebuild; Described mobile terminal successfully maintains the communication link with a community.

8. mobile terminal according to claim 1, wherein said function of reporting is used for providing the list of available Target cell in described report.

9. mobile terminal according to claim 8, wherein said function of reporting is used for the list producing described available Target cell in the following manner: the threshold value of an application cell quality parameter filters out the extraneous community defined in described threshold value.

10. mobile terminal according to claim 9, wherein said function of reporting is used for changing described threshold value according to the current footprint area of described mobile terminal.

11. mobile terminals according to claim 9, wherein said function of reporting is used for the list providing described available Target cell with the sequence of the value of described cell quality parameter.

12. mobile terminals according to claim 1, wherein said function of reporting be used for should from the requirement of at least one cellular radio network described reporting cell measured value.

13. mobile terminals according to claim 3, wherein said function of reporting be used for when rebuild with described mobile terminal the community communicated be put on the blacklist in described historical record in window when described, report for described community.

14. mobile terminals according to claim 1, wherein said function of reporting is used for being forwarded to another network node via report described in a network node at least one cellular radio network described.

15. mobile terminals according to claim 1, wherein said function of reporting is used for the network node being forwarded to another celluler radio via report described in the network node at least one cellular radio network described.

16. 1 kinds of network entities, for having at least one cellular radio network of handoff functionality, described network entity comprises function of reporting, described function of reporting is used for the communication failure event between mobile terminal and the radio base station belonging at least one cellular radio network described, receive the report from described mobile terminal, described report at least comprises the information about described event of failure, the feature of described network entity is, described function of reporting is for receiving described report, and wherein said report comprises:

17. network entities according to claim 16, wherein said function of reporting, for receiving described report, makes described report comprise:

At least one success events occurred in the first geographic area that described mobile terminal has occurred.

18. network entities according to claim 16, wherein said function of reporting is used for from the additional events information of another network entity requests except the information that described mobile terminal is reported, another network entity described is the described history identification reported according to described mobile terminal, and wherein said additional events information comprises at least one item in the following:

Comprise the further historical record of event of failure and the success events occurred in the second geographic area that described mobile terminal occurs;

The radio measurements that what described mobile terminal reported in another community occur in described second geographic area.

19. network entities according to claim 16, wherein said function of reporting is used for estimating at least one performance measurement counting device from described report, and described performance measurement counting device is measuring of the performance being used to indicate at least one cellular radio network described.

20. network entities according to claim 19, wherein said at least one performance measurement counting device is measuring of the number of times described mobile terminal being experienced to access fault because of following arbitrary reason: high capacity, do not observe any response for arbitrary mobile terminal, for non-competing resources measurement to conflict, radio reason.

21. network entities according to claim 19, wherein said at least one performance measurement counting device is the counting to following event: described mobile terminal experiences Radio Link Failure and experience reconstruction in another community subsequently in one cell.

22. network entities according to claim 16, wherein said network entity is following any one: the radio base station transceiver of at least one cellular radio network described, operation and management server.

23. 1 kinds of approaches to IMs, at least one cellular radio network, at least one cellular radio network described has handoff functionality, and described method comprises following steps:

A) when for communication broke down event between the mobile terminal of at least one cellular radio network described and the radio base station belonging at least one cellular radio network described, report is sent at least one cellular radio network described from described mobile terminal, described report at least comprises the information about described event of failure

B) for described, there is in the network entity of at least one cellular radio network of handoff functionality the described report received from described mobile terminal,

The feature of described method is, step a) in: send described report from mobile terminal and comprise to make described report: the event of failure being traced back at least one success events by described event of failure, and the history of described event of failure comprises at least one success events described, described success events is that at least one success events described occurred before described event of failure history about the communication between described mobile terminal and the radio base station belonging at least one cellular radio network described;

24. approaches to IMs according to claim 23, wherein said step a): send described report with at least one success events occurred in make described report be included in the first geographic area that described mobile terminal come across wherein.

25. approaches to IMs according to claim 23, comprise further:

C) described network entity is to another network entity requests extraneous information, described extraneous information from the early stage report of described mobile terminal and the early stage registered events relevant with described mobile terminal,

D) safeguard at least one performance measurement counting device, described performance measurement counting device is based on from step b, or the standard that draws of the described extraneous information received from step b and step c and increasing progressively.

26. approaches to IMs according to claim 25, wherein said steps d) relate at least one performance measurement counting device increase progressively based on following standard: in same geographic area, in a community, Radio Link Failure occur and complete successful reconstitution in another community, described performance measurement counting device is applicable to a paired described community and another community described.

27. approaches to IMs according to claim 26, when being put on the blacklist in the community wherein only mentioned in described history in another community described, carry out increasing progressively described in described performance measurement counting device.

28. approaches to IMs according to claim 25, wherein said steps d) relate at least one performance measurement counting device increase progressively based on following standard: in a geographic area, after switching in cell-of-origin and being triggered, access fault is there is in the Target cell switched, and then in another community, being successfully completed reconstruction, described performance measurement counting device is applicable to paired described cell-of-origin and described Target cell.

29. approaches to IMs according to claim 25, wherein said steps d) relate at least one performance measurement counting device increase progressively based on following standard: in a geographic area, after switching in cell-of-origin and being triggered, access fault is there is in Target cell, and the parameter measuring another community except described Target cell is higher than a threshold value, described performance measurement counting device is applicable to paired described cell-of-origin and described Target cell.

30. approaches to IMs according to claim 25, wherein said steps d) relate at least one performance measurement counting device increase progressively based on following standard: after the handoff failure in a geographic area from cell-of-origin to Target cell, successful reconstitution in another community, wherein said performance counter is applicable to paired another community described and described cell-of-origin.

31. approaches to IMs according to claim 25, wherein said steps d) relate at least one performance measurement counting device increase progressively based on following standard: in same geographic area, beginning is switched to first of first object community with the first cell-of-origin, after repeatedly switching is triggered, access fault is there is in the community switched, and then in another community, being successfully completed reconstruction, described performance measurement counting device is applicable to paired described first cell-of-origin and described first object community.

32. approaches to IMs according to any one claim in claim 26 to 31, device is counted for the performance measurement relevant with the second community with the first community, wherein in order to increase progressively described performance counter, following standard must be met: described mobile terminal is successfully connected to described first community and reaches certain time length.

33. approaches to IMs according to the arbitrary claim in claim 26,27,30, device is counted for the performance measurement relevant with the second community with the first community, wherein in order to increase progressively described performance measurement counting device, described mobile terminal must be met and be successfully connected to the additional criteria that described second community reaches certain time length.

34. approaches to IMs according to the arbitrary claim in claim 26 or 27, device is counted for the performance measurement relevant with the second community with the first community, wherein in order to increase progressively described performance measurement counting device, must meet that described mobile terminal is unsuccessful is connected to the additional criteria that described second community reaches certain time length.