CN110300424A

CN110300424A - Fall method, base station, terminal, electronic equipment and the storage medium of processing after rise

Info

Publication number: CN110300424A
Application number: CN201810235514.3A
Authority: CN
Inventors: 夏龙根
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Group Guangdong Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Group Guangdong Co Ltd
Priority date: 2018-03-21
Filing date: 2018-03-21
Publication date: 2019-10-01

Abstract

The embodiment of the present invention provides a kind of method, base station, terminal, electronic equipment and storage medium for falling processing after rise.The method includes the network qualities according to each Target cell, determine Target cell priority and minimum access level, Target cell is the adjacent area 2G or the adjacent area 3G of the corresponding 4G cell of terminal, priority is the first priority or the second priority, it sends and falls message after rise to terminal, fall the information that message includes at least one Target cell after rise, the information of each Target cell includes the frequency point of Target cell, priority and minimum access level, so that terminal measures the first received signal level of the corresponding frequency point of Target cell of the first priority, if the first received signal level is more than or equal to the first minimum access level, using Target cell as falling cell.Target cell is divided priority according to network quality by the method, and terminal selects the Target cell access of the first priority to be promoted so that terminal falls 2G the or 3G Target cell strong to signal after rise and fall success rate after rise.

Description

Fall method, base station, terminal, electronic equipment and the storage medium of processing after rise

Technical field

The present embodiments relate to field of communication technology, especially a kind of method for falling processing after rise, base station, terminal, electronics Equipment and storage medium.

Background technique

CSFB (the Circuit Switch Fall of 4G (4rd-Generation, fourth generation mobile communication technology) network Back, circuit domain dropping) be 4G net voice service one of bearing mode, be that a kind of voice generallyd use at 4G networking initial stage is held Load mode, CSFB is by falling back to 2G (2rd-Generation, Generation Mobile Telecommunication System technology) or 3G (3rd- for 4G terminal Generation, 3rd generation mobile communication technology) cell, realize voice service.

Part operator using CSFB to UMTS (Universal Mobile Telecommunications System, Universal Mobile Communication System) mode, part operator (such as China Mobile) is using falling back to GSM (Global System for Mobile Communication, global system for mobile communications).The process of CSFB is consistent: base station is being returned Fall message carry measurement frequency point, terminal receive fall after rise message, terminal in the measurement frequency point according to indicated by base station signal it is strongest Cell does falling access.Wherein, terminal is using the mode of blind redirection, and the network quality of the cell of this voice fallback is not It determines, the success rate of falling falls the voice quality after time delay and falling after rise, uncontrollable.

The method for falling processing after rise in the prior art is:

Terminal includes terminal in the side 4G network quality into the falling request that base station is sent, and base station is according to the side 4G network matter Amount, adaptively adjusts the method for issuing CSFB frequency point, can alleviate CSFB caused by network quality difference to a certain extent and fall after rise The case where failure.

But since include is the side 4G network quality for expansion service request, and CSFB is that 2G or 3G cell is fallen back to from 4G Process, if the side 4G network quality it is good but fall after rise after 2G or 3G cell quality it is poor, terminal access 2G or 3G cell, it would still be possible to fall after rise Failure.

Summary of the invention

In view of the drawbacks of the prior art, the embodiment of the present invention provides a kind of method of falling processing, base station, terminal, electronics Equipment and storage medium.

On the one hand, the embodiment of the present invention provides a kind of method for falling processing after rise, which comprises

According to the network quality of each Target cell, determine each Target cell priority and minimum access level, institute The adjacent area 2G or the adjacent area 3G that Target cell is the corresponding 4G cell of terminal are stated, the priority is that the first priority or second are preferential Grade, first priority are higher than second priority, and the Target cell of first priority has corresponding first most Low access level；

It sends and falls message after rise to terminal, described to fall the information that message includes at least one Target cell after rise, each target is small The information in area includes frequency point, priority and the minimum access level of Target cell, so that terminal is directed to the mesh of the first priority The corresponding frequency point of cell, the first received signal level of measurement frequency point are marked, if first received signal level is more than or equal to institute The first minimum access level is stated, using corresponding Target cell as falling cell.

On the other hand, the embodiment of the present invention provides a kind of base station, and the base station includes:

Determining module determines the priority and most of each Target cell for the network quality according to each Target cell Low access level, the Target cell are the adjacent area 2G or the adjacent area 3G of the corresponding 4G cell of terminal, and the priority is first excellent First grade or the second priority, first priority are higher than second priority, and the Target cell of first priority has There is corresponding first minimum access level；

Sending module falls message after rise to terminal for sending, and the falling message includes the letter of at least one Target cell Breath, the information of each Target cell include the frequency point of Target cell, priority and minimum access level, so that terminal is for the The corresponding frequency point of the Target cell of one priority, the first received signal level of measurement frequency point, if described first receives signal electricity It is flat to be more than or equal to the described first minimum access level, using corresponding Target cell as falling cell.

On the other hand, the embodiment of the present invention also provides a kind of first electronic equipment, including first memory, the first processing Device, the first bus and storage on the first memory and the computer program that can be run on first processor, described first The step of processor realizes method as above when executing described program.

On the other hand, the embodiment of the present invention also provides the first storage medium, is stored thereon with computer program, described program It realizes when being executed by first processor such as the step of method as above.

On the other hand, the embodiment of the present invention provides another method for falling processing after rise, which comprises

The falling message that base station is sent is received, it is described to fall the information that message includes at least one Target cell, each mesh after rise The information of mark cell includes frequency point, priority and the minimum access level of Target cell, and the Target cell is that terminal is corresponding 4G cell the adjacent area 2G or the adjacent area 3G, the priority of the Target cell and minimum access level are base stations according to Target cell Network quality determine that the priority is the first priority or the second priority, first priority is higher than described the The Target cell of two priority, first priority has corresponding first minimum access level；

For the corresponding frequency point of Target cell of the first priority, the first received signal level of measurement frequency point；

If first received signal level is more than or equal to the described first minimum access level, corresponding Target cell is made To fall cell after rise.

On the other hand, the embodiment of the present invention also provides a kind of second electronic equipment, including second memory, second processing Device, the second bus and it is stored in the computer program that can be run on second memory and in second processor, described second The step of processor realizes method as above when executing described program.

On the other hand, the embodiment of the present invention also provides the second storage medium, is stored thereon with computer program, described program The step of method as above is realized when being executed by second processor.

As shown from the above technical solution, the method provided in an embodiment of the present invention for falling processing after rise, base station, terminal, electronics are set Each Target cell according to network quality, is divided into the first priority or the by base station by standby and storage medium, the method Two priority, and the minimum access level of Target cell is set, so that the received signal level of terminal actual measurement Target cell, Under the premise of meeting minimum access level, the preferential Target cell access for selecting the first priority falls terminal after rise To the sufficiently strong 2G or 3G Target cell of signal, is promoted and fall success rate after rise.

Detailed description of the invention

Fig. 1 is a kind of flow diagram of method for falling processing after rise provided in an embodiment of the present invention；

Fig. 2 is a kind of flow diagram of the method for falling processing that further embodiment of this invention provides；

Fig. 3 is a kind of functional block diagram of the method for falling processing that further embodiment of this invention provides；

Fig. 4 is the priority resolution principle figure for the Target cell that further embodiment of this invention provides；

Fig. 5 is the realization detail flowchart that further embodiment of this invention provides；

Fig. 6 is that the CSFB that further embodiment of this invention provides falls Signalling exchange flow chart after rise；

Fig. 7 is the decision algorithm schematic diagram for the terminal that further embodiment of this invention provides；

Fig. 8 is a kind of structural schematic diagram for base station that further embodiment of this invention provides；

Fig. 9 is the structural schematic diagram for the first electronic equipment of one kind that further embodiment of this invention provides；

Figure 10 is a kind of structural schematic diagram for terminal that further embodiment of this invention provides；

Figure 11 is the structural schematic diagram for the second electronic equipment of one kind that further embodiment of this invention provides.

Specific embodiment

In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical solution in the embodiment of the present invention is explicitly described, it is clear that described embodiment is the present invention Embodiment a part of the embodiment, instead of all the embodiments.

Fig. 1 shows a kind of flow diagram of method for falling processing after rise provided in an embodiment of the present invention.

As shown in Figure 1, method provided in an embodiment of the present invention specifically includes the following steps:

Step 11, according to the network quality of each Target cell, determine the priority and minimum access of each Target cell Level, the Target cell are the adjacent area 2G or the adjacent area 3G of the corresponding 4G cell of terminal, the priority be the first priority or Second priority, first priority are higher than second priority, and the Target cell of first priority, which has, to be corresponded to The first minimum access level；

Optionally, method provided in an embodiment of the present invention is realized on base station.

Optionally, terminal is sent to base station falls request after rise, and the falling is requested for notifying terminal that will start CSFB process, And the mark and network quality of the 4G cell including terminal.

Optionally, the falling request can request (ESR, Extended Service Request) for expansion service.

Optionally, base station receives the expansion service request, the data needed for falling after rise for terminal configuration.

Optionally, there are many modes of configuration, the embodiment of the present invention is illustrated by taking one of which as an example.

Optionally, base station determines the adjacent area 2G or the adjacent area 3G of 4G cell, by the adjacent area 2G according to the mark of the 4G cell of terminal Or the adjacent area 3G is denoted as Target cell.

Optionally, the network quality of Target cell includes interference and the load of Target cell.Interference refer to Target cell by To the level value of interference signal, load refers to the channel resource amount of Target cell.

Optionally, priority of the base station by interference lower than the Target cell that predetermined level, load are lower than default load is classified as First priority indicates that the network quality of Target cell is relatively good, the Target cell of the first priority of guiding terminal priority access, The priority for the Target cell that interference is higher than predetermined level, load is higher than default load is classified as the second priority.

Optionally, minimum access level is the minimum threshold for the terminal access Target cell that base station determines, when terminal measures To Target cell signal it is sufficiently strong when, just fall after rise to Target cell；If the signal that terminal measures Target cell is not strong enough, The even high cell of priority does not also select to fall after rise to Target cell.

Optionally, minimum access level is a parameter of Cell Broadcast CB in the prior art, and the prior art can be used in base station Mode determine minimum access level.

Optionally, the minimum access level of different target cell may be different, most by the Target cell of the first priority Low access level is denoted as the first minimum access level, and the minimum access level of the Target cell of the second priority is denoted as second Minimum access level.

Step 12 sends and falls message after rise to terminal, and the falling message includes the information of at least one Target cell, each The information of Target cell includes frequency point, priority and the minimum access level of Target cell, so that terminal is preferential for first The corresponding frequency point of Target cell of grade, the first received signal level of measurement frequency point, if first received signal level is greater than Equal to the described first minimum access level, using corresponding Target cell as falling cell.

Optionally, it after base station determines priority and the minimum access level of Target cell, sends and falls message after rise to terminal, The falling message is used to indicate how terminal carries out CSFB falling.

Optionally, the falling message can be RRCConnectionRelease (RRC Connection Release) message.

Optionally, terminal receives the falling message, obtains the information of Target cell, starting CSFB measurement, judgement and choosing Select process.

Optionally, if the Target cell in the falling message including the first priority is known in judgement, terminal is preferentially selected The Target cell for selecting the first priority selects suitable target by the frequency point of the Target cell of the first priority of actual measurement Cell access.

Optionally, terminal measures the corresponding frequency point of any one Target cell, and Rxlev (Received Signal can be obtained Level, received signal level), Rxlev indicates the signal strength of frequency point.

Optionally, the RxLev of the corresponding frequency point of the Target cell of the first priority is denoted as the first received signal level.It will The RxLev of the corresponding frequency point of the Target cell of second priority is denoted as the second received signal level.

Optionally, first received signal level is compared by terminal with the described first minimum access level, if institute The first received signal level is stated more than or equal to the described first minimum access level, indicates that the signal strength of Target cell meets access Requirement, can using the Target cell as fall after rise cell, access to falling cell from 4G cell.

Optionally, each Target cell is divided into the first priority or according to this factor of network quality by base station Two priority, and the minimum access level of Target cell is set, when so that terminal selecting to fall cell after rise in Target cell, full Under the premise of the minimum access level of foot, the preferential Target cell access for selecting the first priority has effectively been evaded CSFB " blind time Fall " the problem of, allow terminal to fall 2G the or 3G Target cell strong to signal after rise, it is to be understood that terminal is fallen after rise to letter Number strong Target cell, is able to ascend falling success rate, and can guarantee that the voice quality after falling after rise is relatively good.

It should be noted that base station once issues the information of a Target cell in the prior art, so that terminal is surveyed every time The frequency point of a Target cell is measured, if being not suitable for access, needs to send falling request again, to obtain a Target cell again Frequency point, then attempted, fall back to falling to 2G cell from terminal starting, time delay is longer.

In the embodiment of the present invention, base station can once issue the information of a Target cell, can also once issue multiple The information of Target cell may make terminal targetedly to search for frequency point respectively if once issuing the information of multiple Target cells, It is primary fall request after rise after get the information of multiple Target cells, and therefrom preferentially access, attempted compared to multiple fall after rise, can be with Shorten CSFB and falls time delay after rise.

The method provided in an embodiment of the present invention for falling processing after rise, base station divides each Target cell according to network quality For the first priority or the second priority, and the minimum access level of Target cell is set, so that terminal actual measurement target is small The received signal level in area, under the premise of meeting minimum access level, the preferential Target cell access for selecting the first priority, Terminal is fallen after rise to the sufficiently strong 2G or 3G Target cell of signal, is promoted and falls success rate after rise.

On the basis of the above embodiments, the method for the falling processing that further embodiment of this invention provides, according to each mesh The network quality for marking cell determines the priority of each Target cell and the step of minimum access level specifically:

The priority for meeting the Target cell of first condition is determined as the first priority:

First condition: the measured value of the idle channel of Target cell is higher than first threshold, signal receiving quality is higher than second Threshold value and from busy without line use ratio be lower than third threshold value.

There are many modes for determining the priority of Target cell, and the embodiment of the present invention is said by taking one way in which as an example It is bright.

Optionally, interference and load the two index evaluations can be used in the network quality of Target cell.

Optionally, using ICM (Idle Channel Measurement, the measured value of idle channel) and RxQual (Received Signal Quality, signal receiving quality) determines that the interference of Target cell is high or low.

Optionally, ICM is the signal level index of the uplink of cell idle channel.

Optionally, whether clearly RxQual is voice quality judgment criteria in communication process, can reflect client to net The perception of network voice quality.

Optionally, the ICM and RxQual of Target cell are obtained from radio network optimization platform, obtaining ICM is more than the first threshold Value, RxQual are more than the Target cell of second threshold, regard as interfering small cell.

Optionally, first threshold and second threshold can be arranged according to the actual situation, such as Cell statistical ICM3~5 grade ratio Lower than 30%, and average speech speech quality RxQual0~4 grade sampled point accounting is higher than 96%；.

Optionally, determine that the channel surplus resources of Target cell are more or few without line use ratio using from busy.

Optionally, refer to 24 hours one day from busy, by the period of period statistics cell maximum value.

Optionally, no line use ratio be 24 hours one day, by the period count cell uplink PRB (physical Resource block, Physical Resource Block) resource utilization maximum value.

Optionally, it using hour as statistical unit, counts from the uplink PRB resource utilization of busy cell, as from busy Without line use ratio.

Optionally, no line use ratio is higher, and surplus resources are fewer, and load is higher.

Optionally, from radio network optimization platform acquisition Target cell without line use ratio, acquisition is lower than without line use ratio The Target cell of third threshold value regards as the low cell of load.

Optionally, third threshold value can be arranged according to the actual situation, may be, for example, 70%, by no line use ratio lower than 70% Target cell regards as the low cell of load.

Optionally, the priority for interfering small and low load Target cell is determined as the first priority.

Optionally, the priority for the Target cell that interference is big or load is high is determined as the second priority.

Other steps of the embodiment of the present invention are similar to previous embodiment step, and the embodiment of the present invention repeats no more.

The method provided in an embodiment of the present invention for falling processing after rise, base station is according to the difference of different target cell, and setting is preferentially Grade, in conjunction with disturbed condition and load capacity, avoids terminal access from interfering strong or capacity crowded when terminal selects to fall cell after rise Cell promotes the voice quality after falling after rise.

On the basis of the above embodiments, the method for the falling processing that further embodiment of this invention provides,

According to the network quality of each Target cell, the priority of each Target cell and the step of minimum access level are determined Suddenly specifically:

According to the average peak of the interference level of Target cell and lowest demodulation thresholding, minimum access level is determined.

There are many modes for determining minimum access level, and the embodiment of the present invention is illustrated by taking one way in which as an example.

In embodiments of the present invention, the calculation of the first minimum access level and the second minimum access level is identical, most Low access level can indicate the first minimum access level, may also indicate that the second minimum access level.

Optionally, network quality is described using disturbed condition.

Optionally, 7 days one week disturbed conditions of Target cell are counted, the maximum of the interference level of daily Target cell is calculated It is worth (i.e. peak value).

Optionally, the peak I of the interference level of daily Target cell can be calculated according to the following formula_day:

I_day=Max (I_hour) hour:

Wherein, hour value indicates one day 24 hour, I from 0 to 23_hourIt is that interference level is most in this hour Big value；

Optionally, the I to 7 days one week_dayIt averages, obtains the average peak of the interference level of Target cell.

Optionally, the average peak I of the interference level of Target cell can be calculated according to the following formula_week:

Optionally, the average peak of interference level indicates the size that Target cell is interfered, the average peak of interference level Value is bigger, indicates that network quality is poor.

Optionally, according to the average peak I of the interference level of Target cell_weekAnd lowest demodulation thresholding C/I (Carrier/Interference, carrier power/interference general power), determines minimum access level CSFB_RXLEVMIN:

CSFB_RXLEVMIN=I_week+SINR_csfb

Wherein, SINR_csfbFor the lowest demodulation thresholding of Target cell, for example, GSM value is 12dB.Optionally, minimum solution Pitch limit is higher, illustrates that network quality is poorer.

If the average peak of interference level is big and lowest demodulation thresholding is high, illustrate that network quality is poorer, then what is obtained is minimum It is also big to access level.

That is, the threshold of terminal access is raised for interfering big cell, so that the reception letter of only terminal measurement When number level is strong, it can access this and interfere big cell.

Even if interference is big, terminal selection is fallen after rise to the Target cell, due to the reception signal electricity of terminal measurement Target cell It is flat strong, interference can be suppressed, guarantees the signal quality after terminal is fallen after rise.

The method provided in an embodiment of the present invention for falling processing after rise, the Target cell of (high interference) poor for network quality lead to It crosses and higher minimum access level is set, it is ensured that the voice quality after falling.

Fig. 2 is a kind of flow diagram of the method for falling processing that further embodiment of this invention provides.

As shown in Fig. 2, method provided in an embodiment of the present invention specifically includes the following steps:

Step 21 receives the falling message that base station is sent, described to fall the information that message includes at least one Target cell after rise, The information of each Target cell includes frequency point, priority and the minimum access level of Target cell, and the Target cell is eventually The adjacent area 2G or the adjacent area 3G of corresponding 4G cell are held, the priority of the Target cell and minimum access level are base stations according to mesh What the network quality of mark cell determined, the priority is the first priority or the second priority, and first priority is higher than The Target cell of second priority, first priority has corresponding first minimum access level；

Optionally, method provided in an embodiment of the present invention is realized at the terminal.

Step 22, the corresponding frequency point of Target cell for the first priority, the first received signal level of measurement frequency point；

Optionally, the RxLev of the corresponding frequency point of the cell of the first priority is denoted as the first received signal level.

If step 23, first received signal level are more than or equal to the described first minimum access level, by corresponding mesh Cell is marked as falling cell.

The method provided in an embodiment of the present invention for falling processing after rise, by base station according to network quality, by each Target cell It is divided into the first priority or the second priority, and the minimum access level of Target cell is set, so that terminal actual measurement mesh The received signal level for marking cell, under the premise of meeting minimum access level, the preferential Target cell for selecting the first priority Access falls terminal to the sufficiently strong 2G or 3G Target cell of signal after rise, is promoted and fall success rate after rise.

On the basis of the above embodiments, the method for the falling processing that further embodiment of this invention provides, if described first Received signal level less than the first minimum access level or it is described fall after rise message include the second priority Target cell, no Target cell including the first priority, the method also includes:

Select the Target cell for meeting second condition as candidate cell；

Second condition: the first received signal level is big less than the first minimum access level or the second received signal level In being equal to the second minimum access level, second received signal level is the corresponding frequency of Target cell for the second priority Point, measures；

Select in the candidate cell the highest Target cell of received signal level as falling cell after rise.

There are many modes for determining falling cell, and the embodiment of the present invention is illustrated by taking one way in which as an example.

In embodiments of the present invention, received signal level can indicate the first minimum access level, may also indicate that second is minimum Level is accessed, can also indicate the first minimum access level and the second minimum access level.

Optionally, to received multiple Target cells, the judgment principle of terminal is divided to two levels: preferable cell and not preferred Cell.

Optionally, preferable cell is the mesh that the first priority and the first received signal level meet the first minimum access level Cell is marked, this partial target cell selects the strongest falling of the first received signal level.

Optionally, not preferred cell is the candidate cell, and there are three types of situations for tool:

The first situation is the mesh for including the first priority but the first received signal level access level minimum less than first Mark cell.

Such case can sort from large to small the first received signal level.

Second situation is the Target cell for including the second priority, and the height of priority is base station according to Target cell Network quality is come what is determined, and there is no the 2G cell for meeting the first priority criteria in possible Target cell, base station is sent to end The Target cell at end only includes the second priority.

Such case can sort from large to small the second received signal level.

For the corresponding frequency point of Target cell of the second priority, measurement obtains second received signal level, i.e., will The RxLev of the corresponding frequency point of the Target cell of second priority is denoted as the second received signal level.

The third situation is the mesh for including the first received signal level the first priority for accessing level minimum less than first Mark the Target cell of cell and the second priority.

Such case can sort from large to small the first received signal level and the second received signal level.

Optionally, terminal is directed to all Target cell configured lists, and ranking is selected to fall after rise near preceding cell CSFB, first It first selects from the list of preferable cell, when list does not have Target cell access when preferable cell, is just selected from not preferred cell Select the strongest falling of received signal level.

The method provided in an embodiment of the present invention for falling processing after rise, the Target cell that end-on is received carry out the sieve of two levels Choosing selects the strongest falling of received signal level, falling success rate can be improved.

In order to more fully understand technology contents of the invention, on the basis of the above embodiments, it is real that the present invention will be described in detail The method that the falling processing of example offer is provided.

The technical solution of the embodiment of the present invention proposes that base station passes through based on differentiation cell preferred CSFB falling mode Sending measuring frequency point is identified into different priorities and access thresholding, terminal according to the actual measurement information under present network conditions, By measurement the identified priority of cell, the cell starting CSFB access of optimal quality is selected.Due to the falling cell of terminal selection Be based on the actual measurement under present network conditions, therefore be able to solve it is existing in the prior art to fall after rise target network quality Differentiate and be not allowed, influences the problem of falling success rate after rise.

A) principle and theoretical explanation

Fig. 3 is a kind of functional block diagram of the method for falling processing that further embodiment of this invention provides.

As indicated at 3, in base station side, according to interference, the capacity factor for falling cell after rise, set its CSFB priority, and by this It is configured to base station CSFB and falls data after rise.

After terminal starts CSFB process, base station is by falling message RRC Connection Release after rise for all fallings Subdistrict frequency point and priority are issued to terminal；In terminal side, for terminal according to actual measurement information, the height that selection meets condition is preferential Grade cell accesses cell as CSFB.

The decision principle of base station of the embodiment of the present invention are as follows:

Base station is good by signal quality, the cell low, that volume load is not high of interference is classified as the high cell of priority, and interference is high, negative The high cell of lotus is classified as low priority cell.

The decision principle of terminal are as follows:

Under the premise of meeting minimum level, terminal selects the cell of highest priority to access cell as CSFB.

In the case where being unsatisfactory for minimum level, the strongest cell of terminal select signal accesses cell as CSFB.

Terminal is accessed by actual measurement, preferably high priority cell, after improving CSFB falling success rate and falling after rise Voice quality；When not having suitable cell, the strongest cell access of terminal select signal avoids secondary falling from attempting, reduces CSFB falls time delay after rise, perceives the CSFB of user and reaches best.

B) algorithm data prepares

Target cell signal interference, load capacity situation of the base station according to falling, are divided into 2 different priority schedulings Grade CSFB_PRIORITY: high priority (HIGH) and low priority (LOW), and it is poor according to the setting of the index properties of each cell Alienation accesses thresholding.Before algorithm unlatching, priority and minimum falling need to be divided according to the index performance for falling Target cell after rise Level.

Fig. 4 is the priority resolution principle figure for the Target cell that further embodiment of this invention provides.

As shown in figure 4, the criteria for classifying is as follows:

1) high priority cell (CSFB_PRIORITY=HIGH) delimit standard:

1. interfering bottom hot-tempered low, determination method are as follows: Cell statistical ICM3~5 grade ratio is lower than 30%, and average speech is conversed Quality RxQual0~4 grade sampled point accounting is higher than 96%；

2. volume load is low, determination method are as follows: be lower than 70% without line use ratio from busy.

The cell met simultaneously 1. and 2. is high priority cell.

2) low priority cell (CSFB_PRIORITY=LOW) delimit standard:

1. interfering the hot-tempered height in bottom, determination method are as follows: Cell statistical ICM3~5 grade ratio is greater than or equal to 30%, or and average Voice call quality RxQual0~4 grade sampled point accounting is less than or equal to 96%；

2. volume load is high, determination method are as follows: be greater than or equal to 70% without line use ratio from busy.

As long as meeting, 1. or 2. the cell of one is low priority cell.

For each priority cell, it is also necessary to its minimum access level (CSFB_RXLEVMIN) is determined, when terminal measures (rxlev is greater than CSFB_RXLEVMIN) for access when its signal is sufficiently strong；And if terminal to measure its signal not strong enough (rxlev is less than or equal to CSFB_RXLEVMIN), the even high cell of priority (CSFB_PRIORITY=HIGH), also not CSFB access is made in selection.

The method of determination of minimum access level (CSFB_RXLEVMIN) are as follows:

1) it fetches and falls 7 days one week interference statistics of Target cell, calculate its peak interference level daily:

I_day=Max (I_hour) hour:

Cell interference level is daily peak averaging:

2) determine that the minimum falling of CSFB accesses level according to the interference of cell:

CSFB_RXLEVMIN=I_week+SINR_csfb

Wherein, SINR_csfbIt is 12dB for the lowest demodulation thresholding C/I for falling system after rise, such as GSM value.

Judgement area interference and the method for capacity described in the embodiment of the present invention include but is not limited to the above method.According to return The statistical data for falling Target cell after determining its interference and capacity situation, determines that its CSFB falls priority attribute after rise, and will be preferential Grade and minimum access level are configured to base station, are handed down to terminal when terminal is fallen after rise.

C) algorithm realizes detailed process

Fig. 5 is the realization detail flowchart that further embodiment of this invention provides.

As shown in figure 5, initiating expansion service request (ESR, Extended Service Request) triggering by terminal CSFB process.The measurement frequency point for carrying precedence information that terminal is issued by receiving base station, starting CSFB measurement, and according to survey The information of amount, preferred signals are sufficiently strong, the sufficiently high cell of priority falls access after rise.

Protocol signaling format, agreement process involved by algorithm are described in detail as follows:

1) protocol signaling interaction and signaling format

Fig. 6 is that the CSFB that further embodiment of this invention provides falls Signalling exchange flow chart after rise.

As shown in fig. 6, base station passes through under RRCConnectionRelease message after terminal starts ESR service request CSFB frequency point is sent out to terminal.Terminal starts CSFB measurement procedure by the CSFB frequency point that base station issues.Wherein Content entrained by RRCConnectionRelease updates.

It is described according to 3GPP TS36.331 6.2.2 chapters and sections, RRCConnectionRelease (RRC Connection Release) message Format redirectedCarrierInfo (redirect and carry information), idleModeMobilityControlInfo (Idle state Mobile control information), the information such as nonCriticalExtension (non-key extension).

RRC information format is as follows:

CSFB involved in the embodiment of the present invention falls the information such as frequency point, priority, the access thresholding of cell after rise at this Message is issued.

Wherein redirectedCarrierInfo includes the frequency point GeranFreqList that target falls cell after rise, IdleModeMobilityControlInfo includes the priority CSFB_PRIORITY that target falls cell after rise, NonCriticalExtension extension information is used to carry the minimum access thresholding CSFB_RXLEVMIN that target falls cell after rise.

RRCConnectionRelease message field carries content such as table 1.

Table 1

2) terminal measurement and judging process

Terminal by receive RRCConnectionRelease message, obtain fall after rise cell needed for frequency point, priority and Threshold information is accessed, and starts CSFB measurement and judging process:

1. high priority cell measurement: the frequency point of terminal first search CSFB_PRIORITY=HIGH；

2. searching the frequency point of CSFB_PRIORITY=HIGH, start the measurement to frequency point；Otherwise it jumps 5.；

3. frequency point signal strength RxLev is higher than defined CSFB_RXLEVMIN, sort into high priority candidate cell； Otherwise it jumps 7.；

4. high priority candidate cell sorts from high to low according to RxLev, selected and sorted is accessed near preceding cell CSFB, It jumps 8.；

5. low priority cell measurement:

6. searching the frequency point of CSFB_PRIORITY=LOW, start the measurement to frequency point；Otherwise it falls failure after rise, jumps 8.；

7. all candidate cells searched sort from high to low according to RxLev, selected and sorted is near preceding cell CSFB 8. access is jumped；

8. CSFB falling terminates.

Fig. 7 is the decision algorithm schematic diagram for the terminal that further embodiment of this invention provides.

As shown in fig. 7, terminal is divided to two levels to the falling candidate cell sequence searched: preferable cell and not preferred small Area.Preferable cell is high priority and the cell that signal strength is met the requirements, this cell portion is preferentially connect by signal strength Enter；Not preferred cell includes high priority, but signal strength is unsatisfactory for desired cell and low priority cell, this part Cell also presses signal strength sequence.Terminal, with list is needed, selects ranking near preceding cell CSFB according to optimal candidate cell It falls after rise, is selected first from preferable cell list, when list does not have cell access when preferable cell, just press signal from not preferred cell Intensity priority access.

The embodiment of the present invention proposes to be based on the preferred CSFB drop method of cell: will fall candidate cell after rise by interference and matter The factors such as difference, capacity, flexible configuration is at high priority or low priority cell, and terminal is when falling cell selection after rise, according to network Signal condition, preferably interferes that low, capacity is sufficient, and sufficiently strong cell is fallen after rise synchronous signal again, is promoted and falls success rate and falling after rise Voice quality afterwards.

The embodiment of the present invention proposes the CSFB cut-in method based on differentiation minimum access level: falling after rise in terminal selection small Qu Shi passes through setting for high interference cell to the different access threshold level of the cell setting of different quality, different capabilities Higher CSFB accesses threshold requirement, it is ensured that the voice quality after CSFB falling；And for, high load capacity cell, can keep away Exempted from multi-user's falling and cause congestion, and promoted CSFB and fall success rate after rise.

It is proposed that flexible frequency point issues and falls decision mechanism after rise: by once issuing multiple measurement frequency points, terminal searching is arrived The falling candidate cell of various signal strengths, signal quality；And flexible access decision algorithm is combined, allow terminal one Multiple falling candidate cells are got in secondary falling request and preferentially fall access after rise, are attempted, can substantially be contracted compared to repeatedly falling after rise Short CSFB falls time delay after rise.

It proposes that flexible and changeable CSFB falls mechanism after rise: by flexibly configuring cell optimum condition, realizing that CSFB falls words after rise The interference of business is evaded, capacity shunts aspect, realizes flexibly dredging for CSFB traffic.

Compared with prior art, the embodiment of the present invention has following technological merit:

1) it is based on the preferred CSFB drop method of cell, the blind redirection bring of CSFB is solved and falls uncertainty after rise.It is existing Some CSFB fall mechanism after rise, and terminal falls cell after rise, be easy back according to the falling frequency point configured, only basis signal power selection It falls on and interferes big, traffic congestion cell, so that current network CSFB be caused to fall the poor status of voice quality perception after rise.The present invention Embodiment adjudicates according to the network quality of terminal actual measurement and selects optimal cell access, effectively evaded CSFB " blind time Fall " the problem of.

2) embodiment of the present invention according to fall after rise candidate cell priority and the minimum access thresholding of differentiation preferably access Method, it is not high to solve the problems, such as that current CSFB falls success rate after rise.When Target cell interference is big, door is accessed by lifting Sill are fallen after rise when signal is strong, can be suppressed and be interfered by signal strength；And when signal strength not enough suppresses interference, then Even if cell signal strength is forward, also do not fall after rise, by terminal according to the valid signal strengths of surveyed cell and pair of interference level Weight standard, determines whether to fall after rise.The problem of present terminal is fallen after rise according only to cell signal strength selection CSFB is avoided, it is more applicable In the strong status of current 2G network portion area interference, avoid falling back to the high-quality poor cell of strong signal and caused by fall failure rate after rise High problem.

3) mechanism of " one-shot measurement is preferentially fallen after rise " of the embodiment of the present invention, issues multiple measurement frequency points in primary falling, So that terminal has enough candidate cells to fall after rise, avoid because the definition of CSFB frequency point it is incomplete caused by can fall after rise without cell, or Low, the too weak cell of signal strength is interfered although falling back to；Or pass through multiple sending measuring frequency point, repeatedly trial access institute The problem of caused falling time overlength, can greatly promote the voice quality after CSFB is fallen after rise, shorten CSFB and fall time delay after rise.

Fig. 8 is a kind of structural schematic diagram for base station that further embodiment of this invention provides.

Referring to Fig. 8, on the basis of the above embodiments, base station provided in an embodiment of the present invention, the base station includes determining Module 81 and sending module 82, in which:

Determining module 81 is used to determine the priority and most of each Target cell according to the network quality of each Target cell Low access level, the Target cell are the adjacent area 2G or the adjacent area 3G of the corresponding 4G cell of terminal, and the priority is first excellent First grade or the second priority, first priority are higher than second priority, and the Target cell of first priority has There is corresponding first minimum access level；Sending module 82 falls message after rise to terminal for sending, and the falling message includes extremely The information of a few Target cell, the information of each Target cell includes the frequency point of Target cell, priority and minimum access Level, for terminal be directed to the first priority the corresponding frequency point of Target cell, the first received signal level of measurement frequency point, if First received signal level is more than or equal to the described first minimum access level, and corresponding Target cell is small as falling after rise Area.

Determining module 81 determines the adjacent area 2G or the adjacent area 3G of 4G cell, by the adjacent area 2G according to the mark of the 4G cell of terminal Or the adjacent area 3G is denoted as Target cell.

Optionally, the priority by interference lower than the Target cell that predetermined level, load are lower than default load is classified as first Priority indicates that the network quality of Target cell is relatively good, the Target cell of the first priority of guiding terminal priority access, interference Priority higher than the Target cell that predetermined level, load are higher than default load is classified as the second priority.

Sending module 82, which is sent, falls message after rise to terminal, and the falling message is used to indicate how terminal carries out CSFB times It falls.

Optionally it is determined that module 81 is divided into first preferentially according to this factor of network quality, by each Target cell Grade or the second priority, and the minimum access level of Target cell is set, so that terminal selects to fall cell after rise in Target cell When, under the premise of meeting minimum access level, the preferential Target cell access for selecting the first priority is effectively evaded The problem of CSFB " blind falling ", allows terminal to fall 2G the or 3G Target cell strong to signal after rise, it is to be understood that terminal It falls the Target cell strong to signal after rise, is able to ascend falling success rate, and can guarantee that the voice quality after falling after rise is relatively good.

In the embodiment of the present invention, sending module 82 can once issue the information of a Target cell, can also it is primary under The information for sending out Target cell multiple may make terminal targetedly to search for respectively if once issuing the information of multiple Target cells Frequency point gets the information of multiple Target cells after primary falling request, and therefrom preferentially accesses, and tastes compared to multiple falling Examination can shorten CSFB and fall time delay after rise.

Base station provided in an embodiment of the present invention, can be used for executing the method for above method embodiment, this implementation repeats no more.

Each Target cell is divided by base station provided in an embodiment of the present invention by determining module according to network quality First priority or the second priority, and the minimum access level of Target cell is set, so that terminal actual measurement Target cell Received signal level, under the premise of meeting minimum access level, the preferential Target cell access for selecting the first priority makes Obtaining terminal can fall after rise to the sufficiently strong 2G or 3G Target cell of signal, promoted and fall success rate after rise.

Fig. 9 shows the structural schematic diagram of the first electronic equipment of one kind of further embodiment of this invention offer.

Refering to Fig. 9, the first electronic equipment provided in an embodiment of the present invention, first electronic equipment includes first memory (memory) 91 it, the 92, first bus 93 of first processor (processor) and is stored on first memory 91 and can be The computer program run on one processor.Wherein, the first memory 91, first processor 92 pass through first bus 93 complete mutual communication.

The first processor 92 is used to call the program instruction in the first memory 91, when executing described program Realize the method such as Fig. 1.

In another embodiment, following method is realized when the processor executes described program:

In another embodiment, following method is realized when the processor executes described program: according to each target The network quality of cell determines the priority of each Target cell and the step of minimum access level specifically:

Electronic equipment provided in an embodiment of the present invention can be used for executing the corresponding program of method of above method embodiment, This implementation repeats no more.

Electronic equipment provided in an embodiment of the present invention is realized when executing described program by the processor according to network matter Amount, is divided into the first priority or the second priority for each Target cell, and the minimum access level of Target cell is arranged, makes The received signal level for obtaining terminal actual measurement Target cell preferentially selects first under the premise of meeting minimum access level The Target cell of priority accesses, and terminal is fallen after rise to the sufficiently strong 2G or 3G Target cell of signal, promoted fall after rise at Power.

The first storage medium of one kind that further embodiment of this invention provides is stored with computer on first storage medium Program is realized when described program is executed by processor such as the step of Fig. 1.

In another embodiment, following method is realized when described program is executed by processor:

Storage medium provided in an embodiment of the present invention realizes above method embodiment when described program is executed by processor Method, this implementation repeat no more.

It is preferential to be divided into first according to network quality by storage medium provided in an embodiment of the present invention for each Target cell Grade or the second priority, and the minimum access level of Target cell is set, so that the reception of terminal actual measurement Target cell is believed Number level, under the premise of meeting minimum access level, the preferential Target cell access for selecting the first priority, so that terminal can To fall after rise to the sufficiently strong 2G or 3G Target cell of signal, is promoted and fall success rate after rise.

Further embodiment of this invention discloses a kind of computer program product, and the computer program product is non-including being stored in Computer program in transitory computer readable storage medium, the computer program include program instruction, when described program refers to When order is computer-executed, computer is able to carry out method provided by above-mentioned each method embodiment, for example,

Figure 10 is a kind of structural schematic diagram for terminal that further embodiment of this invention provides.

Referring to Fig.1 0, on the basis of the above embodiments, terminal provided in an embodiment of the present invention, the terminal includes receiving Module 101, measurement module 102 and falling module 103, in which:

Receiving module 101 is used to receive the falling message of base station transmission, and the falling message includes that at least one target is small The information in area, the information of each Target cell include the frequency point of Target cell, priority and minimum access level, the target Cell is the adjacent area 2G or the adjacent area 3G of the corresponding 4G cell of terminal, and the priority of the Target cell and minimum access level are bases It stands according to the determination of the network quality of Target cell, the priority is the first priority or the second priority, and described first is excellent First grade is higher than second priority, and the Target cell of first priority has corresponding first minimum access level；It surveys Measure the corresponding frequency point of Target cell that module 102 is used to be directed to the first priority, the first received signal level of measurement frequency point；It returns If stamping die block 103 is more than or equal to the described first minimum access level for first received signal level, by corresponding target Cell is as falling cell.

Receiving module 101 receives the falling message, obtains the information of Target cell, starting CSFB measurement, judgement and choosing Select process.

If measurement module 102 judges to know the Target cell in the falling message including the first priority, terminal is excellent The Target cell for first selecting the first priority, by the frequency point of the Target cell of the first priority of actual measurement, selection is suitable Target cell access.

It falls module 103 after rise to be compared first received signal level with the described first minimum access level, if institute The first received signal level is stated more than or equal to the described first minimum access level, indicates that the signal strength of Target cell meets access Requirement, can using the Target cell as fall after rise cell, access to falling cell from 4G cell.

Terminal provided in an embodiment of the present invention, can be used for executing the method for above method embodiment, this implementation repeats no more.

Each Target cell is divided into first by base station according to network quality by terminal provided in an embodiment of the present invention Priority or the second priority, and the minimum access level of Target cell is set, so that measurement module actual measurement Target cell Received signal level, under the premise of meeting minimum access level, fall after rise module preferentially select the target of the first priority small Area's access falls terminal to the sufficiently strong 2G or 3G Target cell of signal after rise, is promoted and fall success rate after rise.

Figure 11 shows the structural schematic diagram of the second electronic equipment of one kind of further embodiment of this invention offer.

Refering to fig. 11, the second electronic equipment provided in an embodiment of the present invention, second electronic equipment includes the second storage It device 111, second processor 112, the second bus 113 and is stored on second memory 111 and can be transported in second processor Capable computer program.Wherein, the second memory 111, second processor 112 complete phase by second bus 113 Communication between mutually.

The second processor 112 is used to call the program instruction in the second memory 111, to execute described program The method of Shi Shixian such as Fig. 2.

If first received signal level includes second excellent less than the first minimum access level or the falling message The Target cell of first grade does not include the Target cell of the first priority, the method also includes:

Select the Target cell for meeting second condition as candidate cell；

Each Target cell is divided into first according to network quality by the second electronic equipment provided in an embodiment of the present invention Priority or the second priority, and the minimum access level of Target cell is set, so that terminal actual measurement Target cell connects Signal level is received, under the premise of meeting minimum access level, the preferential Target cell access for selecting the first priority, so that eventually End can be fallen after rise to the sufficiently strong 2G or 3G Target cell of signal, promoted and fallen success rate after rise.

The second storage medium of one kind that further embodiment of this invention provides is stored with computer on second storage medium Program is realized when described program is executed by processor such as the step of Fig. 2.

Select the Target cell for meeting second condition as candidate cell；

Second storage medium provided in an embodiment of the present invention realizes that the above method is implemented when described program is executed by processor The method of example, this implementation repeat no more.

Each Target cell is divided into first according to network quality by the second storage medium provided in an embodiment of the present invention Priority or the second priority, and the minimum access level of Target cell is set, so that terminal actual measurement Target cell connects Signal level is received, under the premise of meeting minimum access level, the preferential Target cell access for selecting the first priority, so that eventually End can be fallen after rise to the sufficiently strong 2G or 3G Target cell of signal, promoted and fallen success rate after rise.

It will be appreciated by those of skill in the art that although some embodiments described herein include other embodiments is wrapped Certain features for including rather than other feature, but the combination of the feature of different embodiments mean in the scope of the present invention it It is interior and form different embodiments.

It will be understood by those skilled in the art that each step in embodiment can be implemented in hardware, or at one or The software module run on the multiple processors of person is realized, or is implemented in a combination thereof.Those skilled in the art should manage Solution, can be used in practice microprocessor or digital signal processor (DSP) to realize according to an embodiment of the present invention one The some or all functions of a little or whole components.The present invention is also implemented as executing method as described herein Some or all device or device programs (for example, computer program and computer program product).

Although the embodiments of the invention are described in conjunction with the attached drawings, but those skilled in the art can not depart from this hair Various modifications and variations are made in the case where bright spirit and scope, such modifications and variations are each fallen within by appended claims Within limited range.

Claims

1. a kind of method for falling processing after rise, which is characterized in that the described method includes:

According to the network quality of each Target cell, determine each Target cell priority and minimum access level, the mesh Mark cell be the corresponding 4G cell of terminal the adjacent area 2G or the adjacent area 3G, the priority be the first priority or the second priority, First priority is higher than second priority, and the Target cell of first priority has corresponding first minimum to connect Enter level；

It sends and falls message after rise to terminal, the falling message includes the information of at least one Target cell, each Target cell Information includes frequency point, priority and the minimum access level of Target cell, so that terminal is small for the target of the first priority The corresponding frequency point in area, the first received signal level of measurement frequency point, if first received signal level is more than or equal to described the One minimum access level, using corresponding Target cell as falling cell.

2. according to the method described in claim 1, it is characterized by: being determined each according to the network quality of each Target cell The step of priority of Target cell and minimum access level specifically:

First condition: the measured value of the idle channel of Target cell is higher than first threshold, signal receiving quality is higher than second threshold It is lower than third threshold value without line use ratio with from busy.

3. according to the method described in claim 1, it is characterized by: being determined each according to the network quality of each Target cell The step of priority of Target cell and minimum access level specifically:

4. a kind of method for falling processing after rise, which is characterized in that the described method includes:

The falling message that base station is sent is received, described to fall the information that message includes at least one Target cell after rise, each target is small The information in area includes frequency point, priority and the minimum access level of Target cell, and the Target cell is the corresponding 4G of terminal The adjacent area 2G or the adjacent area 3G of cell, the priority of the Target cell and minimum access level are net of the base station according to Target cell What network quality determined, the priority is the first priority or the second priority, and it is excellent that first priority is higher than described second The Target cell of first grade, first priority has corresponding first minimum access level；

If first received signal level be more than or equal to the described first minimum access level, using corresponding Target cell as time Fall cell.

5. according to the method described in claim 4, it is characterized by: being connect if first received signal level is minimum less than first Enter level or the falling message includes the Target cell of the second priority, does not include the Target cell of the first priority, institute State method further include:

Select the Target cell for meeting second condition as candidate cell；

Second condition: the first received signal level is greater than etc. less than the first minimum access level or the second received signal level In the second minimum access level, second received signal level is the corresponding frequency point of Target cell for the second priority, What measurement obtained；

6. a kind of base station, which is characterized in that the base station includes:

Determining module determines the priority of each Target cell and minimum connects for the network quality according to each Target cell Enter level, the Target cell is the adjacent area 2G or the adjacent area 3G of the corresponding 4G cell of terminal, and the priority is the first priority Or second priority, first priority are higher than second priority, the Target cell of first priority has pair The minimum access level of first answered；

Sending module falls message after rise to terminal for sending, and the falling message includes the information of at least one Target cell, often The information of one Target cell includes frequency point, priority and the minimum access level of Target cell, so that terminal is excellent for first The corresponding frequency point of the Target cell of first grade, the first received signal level of measurement frequency point, if first received signal level is big In being equal to the described first minimum access level, using corresponding Target cell as falling cell.

7. a kind of first electronic equipment, which is characterized in that including first memory, first processor, the first bus and storage On the first memory and the computer program that can be run on first processor, when the first processor executes described program It realizes such as the step of claim 1-3 any one.

8. a kind of first storage medium, is stored thereon with computer program, it is characterised in that: described program is held by first processor It realizes when row such as the step of claim 1-3 any one.

9. a kind of terminal, which is characterized in that the terminal includes:

Receiving module, it is described to fall the letter that message includes at least one Target cell after rise for receiving the falling message of base station transmission Breath, the information of each Target cell includes that the frequency point of Target cell, priority and minimum access level, the Target cell are The adjacent area 2G or the adjacent area 3G of the corresponding 4G cell of terminal, the priority of the Target cell and minimum access level be base station according to What the network quality of Target cell determined, the priority is the first priority or the second priority, and first priority is high There is corresponding first minimum access level in the Target cell of second priority, first priority；

Measurement module, for being directed to the corresponding frequency point of Target cell of the first priority, the first of measurement frequency point receives signal electricity It is flat；

Fall module after rise, it, will be corresponding if being more than or equal to the described first minimum access level for first received signal level Target cell is as falling cell.

10. a kind of second electronic equipment, which is characterized in that including second memory, second processor, the second bus and storage On second memory and the computer program that can be run in second processor, when the second processor executes described program Realize such as claim 4 or 5 steps.

11. a kind of second storage medium, is stored thereon with computer program, it is characterised in that: described program is by second processor Such as claim 4 or 5 steps are realized when execution.