CN102026260A - Switching method and terminal and network device - Google Patents

Abstract

The invention relates to the field of communication technologies and discloses a switching method and terminal and network device. The switching method comprises the steps of: measuring the channel quality of every carrier frequency of a serving cell of a terminal; evaluating the comprehensive channel quality Q source of the serving cell according to the channel quality of every carrier frequency of the serving cell; measuring the channel quality of every carrier frequency of the target cell; evaluating the comprehensive channel quality Q target of the target cell according to the channel quality of every carrier frequency of the target cell; and when the Q source and the Q target satisfy setting conditions, informing the network side to ensure that the network side switches the terminal from the serving cell to the target cell. The embodiment of the invention can be used for carrying out a comprehensive evaluation on all the carrier waves of the serving cell and the target cell, carrying out a comparison after obtaining the comprehensive channel qualities of the serving cell and the target cell, and triggering the terminal switching according to the comparison result, thereby enhancing the accuracy of the terminal switching.

Description

A kind of changing method and terminal, the network equipment

Technical field

The present invention relates to communication technical field, relate in particular to a kind of changing method and terminal, the network equipment.

Background technology

In multi-carrier frequency communication system, terminal (User Equipment, UE) can keep connecting with a plurality of sub-districts that work in different carrier frequency simultaneously, UE can receive high-speed downlink packet by a plurality of sub-districts that work in different carrier frequency and insert (High Speed Downlink Packet Access, HSDPA) data and transmission High Speed Uplink Packet insert (High Speed Uplink Packet Access, HSUPA) data.

When UE works in two carrier frequency, the main carrier frequency that to set in advance a carrier frequency be UE, another carrier frequency is the assistant carrier frequency of UE, the working carrier frequency of configuration UE is a main carrier frequency simultaneously.(Dual Cell-HSDPA DC-HSDPA) comprises the sub-district that a pair of overlay area is identical in the system, the sub-district that works in main carrier frequency is the main carrier frequency sub-district, and the sub-district that works in assistant carrier frequency is the assistant carrier frequency sub-district at double small district HSDPA.Wherein, it is right that main carrier frequency sub-district that the overlay area is identical and assistant carrier frequency sub-district constitute a sub-district, provides data transport service for UE simultaneously.

At present, only depend on the main carrier measurement and carry out the Serving cell switching, might cause like this, the channel quality of the assistant carrier frequency of the Target cell after the switching is worse than the assistant carrier frequency channel quality of Serving cell far away, thereby makes communication quality reduce.

Summary of the invention

The embodiment of the invention provides a kind of changing method and terminal, the network equipment, can improve the accuracy that terminal is switched.

In order to solve the problems of the technologies described above, the embodiment of the invention provides following technical scheme:

The embodiment of the invention provides a kind of changing method, comprising:

The channel quality of each carrier frequency of the Serving cell of measuring terminals;

Comprehensive channel quality Q according to the channel quality assessment Serving cell of each carrier frequency of described Serving cell _Source

The channel quality of each carrier frequency of measurement target sub-district;

Comprehensive channel quality Q according to the channel quality assessment Target cell of each carrier frequency of described Target cell _Target

At described Q _SourceWith described Q _TargetWhen satisfying the condition of setting, the informing network side is so that network side switches to Target cell with described terminal from Serving cell.

The embodiment of the invention also provides a kind of changing method, comprising:

The channel quality of each carrier frequency of the Serving cell that receiving terminal reports, and the channel quality of each carrier frequency of Target cell;

Comprehensive channel quality Q according to the described Serving cell of channel quality assessment of each carrier frequency of described Serving cell _Source

Comprehensive channel quality Q according to the described Target cell of channel quality assessment of each carrier frequency of described Target cell _Target

At described Q _SourceWith described Q _TargetWhen satisfying the condition of setting, then described terminal is switched to Target cell from Serving cell.

The embodiment of the invention provides a kind of terminal, comprising:

First measuring unit is used to measure the channel quality of each carrier frequency of the Serving cell of this terminal;

First assessment unit is used for the comprehensive channel quality Q according to the channel quality assessment Serving cell of each carrier frequency of described Serving cell _Source

Second measuring unit is used for the channel quality of each carrier frequency of measurement target sub-district;

Second assessment unit is used for the comprehensive channel quality Q according to the channel quality assessment Target cell of each carrier frequency of described Target cell _Target

First judging unit is used to judge described Q _SourceWith described Q _TargetBetween whether satisfy the condition of setting;

Notification unit is used in the judged result of described first judging unit when being, the informing network side is so that network side switches to Target cell with terminal from Serving cell.

The embodiment of the invention provides a kind of network equipment, comprising:

Receiving element is used for the channel quality of each carrier frequency of the Serving cell that receiving terminal reports and the channel quality of each carrier frequency of Target cell;

The 3rd assessment unit is used for the comprehensive channel quality Q according to the described Serving cell of channel quality assessment of each carrier frequency of described Serving cell _Source

The 4th assessment unit is used for the comprehensive channel quality Q according to the described Target cell of channel quality assessment of each carrier frequency of described Target cell _Target

The 3rd judging unit is used to judge described Q _SourceAnd Q _TargetBetween whether satisfy the condition of setting;

Switch unit is used in the judged result of described the 3rd judging unit for being then described terminal to be switched to described Target cell from described Serving cell.

As can be seen from the above technical solutions, the embodiment of the invention has the following advantages:

In the embodiment of the invention, be no longer dependent on the switching that only the main carrier measurement of Serving cell and Target cell is come triggering terminal, but all carrier waves of Serving cell and Target cell are all carried out comprehensive assessment, obtained comparing after the comprehensive channel quality of Serving cell and Target cell, and come triggering terminal to switch according to comparative result, the accuracy that terminal is switched can be improved like this, and then the communication quality of terminal can be improved.

Description of drawings

In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, to do to introduce simply to the accompanying drawing of required use among the embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 provides a kind of changing method flow chart for the embodiment of the invention one;

Embodiment flow chart of evaluation services sub-district comprehensive channel quality that Fig. 2 provides for the embodiment of the invention one;

Embodiment flow chart of assessment objective sub-district comprehensive channel quality that Fig. 3 provides for the embodiment of the invention one;

Another embodiment flow chart of evaluation services sub-district comprehensive channel quality that Fig. 4 provides for the embodiment of the invention one;

Another embodiment flow chart of assessment objective sub-district comprehensive channel quality that Fig. 5 provides for the embodiment of the invention one;

Fig. 6 provides another kind of changing method flow chart for the embodiment of the invention two;

A kind of terminal structure figure that Fig. 7 a provides for the embodiment of the invention three;

Another terminal structure figure that Fig. 7 b provides for the embodiment of the invention three;

A kind of structure chart of first assessment unit that Fig. 8 a provides for the embodiment of the invention three;

A kind of structure chart of second assessment unit that Fig. 8 b provides for the embodiment of the invention three;

The another kind of structure chart of first assessment unit that Fig. 9 a provides for the embodiment of the invention three;

The another kind of structure chart of second assessment unit that Fig. 9 b provides for the embodiment of the invention three;

Another structure chart of first assessment unit that Figure 10 a provides for the embodiment of the invention three;

Another structure chart of second assessment unit that Figure 10 b provides for the embodiment of the invention three;

Another structure chart of first assessment unit that Figure 11 a provides for the embodiment of the invention three;

Another structure chart of second assessment unit that Figure 11 b provides for the embodiment of the invention three;

A kind of structure chart of first judging unit that Figure 11 c provides for the embodiment of the invention three;

The structure chart of a kind of network equipment that Figure 12 a provides for the embodiment of the invention four;

The structure chart of another network equipment that Figure 12 b provides for the embodiment of the invention four;

A kind of structure chart of the 3rd assessment unit that Figure 13 a provides for the embodiment of the invention four;

A kind of structure chart of the 4th assessment unit that Figure 13 b provides for the embodiment of the invention four;

The another kind of structure chart of the 3rd assessment unit that Figure 14 a provides for the embodiment of the invention four;

The another kind of structure chart of the 4th assessment unit that Figure 14 b provides for the embodiment of the invention four;

A kind of structure chart of the 3rd assessment unit that Figure 15 a provides for the embodiment of the invention four;

A kind of structure chart of the 4th assessment unit that Figure 15 b provides for the embodiment of the invention four;

The another kind of structure chart of the 3rd assessment unit that Figure 16 a provides for the embodiment of the invention four;

The another kind of structure chart of the 4th assessment unit that Figure 16 b provides for the embodiment of the invention four;

A kind of structure chart of the 3rd judging unit that Figure 16 c provides for the embodiment of the invention four.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.

At present, the measurement of UE and mobile management are based on all main carrier frequency carries out.When UE moves to the edge of the main carrier frequency sub-district of this UE of current service or assistant carrier frequency sub-district, the radio signal quality of main carrier frequency sub-district and assistant carrier frequency sub-district is all poor, radio network controller (Radio Network Controller, RNC) measurement report of the main carrier frequency that then can report according to UE or base station (NodeB) carries out the switching of Serving cell, the main carrier frequency sub-district of UE and assistant carrier frequency sub-district are switched to another adjacent with UE simultaneously to sub-district that works in main carrier frequency and the sub-district that works in assistant carrier frequency, to constitute the Serving cell of new service UE.Compare with single carrier frequency system, the main carrier frequency sub-district in the multi-carrier frequency system and the radio signal quality sum of assistant carrier frequency sub-district in the main carrier frequency sub-district or the edge of assistant carrier frequency sub-district be quick downward trend, so, Serving cell in multi-carrier frequency system switches the cutting off rate that can increase in the handoff procedure, has reduced the throughput of UE in the handoff procedure.

In multi-carrier frequency communication system, for example can realize a kind of switching of Serving cell as follows: UE measures the main carrier frequency of Serving cell and Target cell respectively under the indication of network side RNC, obtains Serving cell main carrier frequency measurement result Q _F1-sourceAnd Target cell main carrier frequency measurement result Q _F1-targetWherein, Q _F1-sourceAnd Q _F1-targetCan be the received power of main carrier frequency simultaneously; Then, UE judges Q _F1-sourceAnd Q _F1-targetWhether satisfy formula: 10Log (Q _F1-target)-10Log (Q _F1-source)＞H _1d/ 2; Wherein, H _1dThe/2nd, the switching sluggishness of prenoticing UE by network side; If above-mentioned formula is set up, then UE reports the measurement report of main carrier frequency to network side RNC, and the Serving cell that network side RNC will serve UE according to this measurement report switches to Target cell.

But, above-mentioned changing method only determines whether triggering switching between Serving cell to the main carrier measurement of Serving cell and Target cell, the assistant carrier frequency that this method is based upon hypothesis Serving cell and Target cell has identical signal quality or identical variation tendency is arranged with main carrier frequency, but for the situation in the real network, this hypothesis might not be set up.Because the load on each carrier frequency of Serving cell and Target cell, interference, path loss (being path loss) are all not necessarily identical.

Embodiment one:

See also Fig. 1, a kind of changing method flow chart that Fig. 1 provides for the embodiment of the invention one.As shown in Figure 1, this method can comprise step:

101, the channel quality of each carrier frequency of the Serving cell of measuring terminals;

Wherein, each carrier frequency that UE can start Serving cell by the measurement control messages (Measurement Control) that receives the RNC transmission carries out channel quality measurement, perhaps, when UE also can reach in the preset time value of local timer, spontaneous startup is carried out channel quality measurement to each carrier frequency of Serving cell, and perhaps network side can also start UE by other signaling messages each carrier frequency of Serving cell is carried out channel quality measurement.

Wherein, UE belongs to general knowledge known in those skilled in the art to the specific implementation process that each carrier frequency of Serving cell carries out channel quality measurement, and present embodiment is not given unnecessary details at this.

102, according to the comprehensive channel quality Q of the channel quality assessment Serving cell of each carrier frequency of above-mentioned Serving cell _Source

103, the channel quality of each carrier frequency of measurement target sub-district;

104, according to the comprehensive channel quality Q of the channel quality assessment Target cell of each carrier frequency of above-mentioned Target cell _Target

105, at above-mentioned Q _SourceWith above-mentioned Q _TargetBetween satisfy to set condition the time, the informing network side is so that network side switches to Target cell with terminal from Serving cell.

Wherein, Serving cell and Target cell related in present embodiment and the subsequent embodiment all are can be the multi-carrier frequency cell with main carrier frequency and assistant carrier frequency, for example included sub-district of DC-HSDPA system etc.; Perhaps, having a sub-district in Serving cell and the Target cell at least is the multi-carrier frequency cell with main carrier frequency and assistant carrier frequency.

Wherein, there is not order successively between above-mentioned step 101 and the step 103, do not have order successively between same above-mentioned step 102 and the step 104 yet.

For instance, the concrete reality of above-mentioned step 102 can adopt following method:

According to the measured value size of the channel quality of each carrier frequency of above-mentioned Serving cell, choose the superior of measured value as above-mentioned Serving cell comprehensive channel quality Q _Source

Such as, obtained the measured value of the channel quality of the individual carrier frequency of n (n 〉=1) (comprising main carrier frequency and assistant carrier frequency) in the above-mentioned steps 101, be respectively Q _F1-source, Q _F2-source..., Q _Fn-sourceIf characterize the channel quality of each carrier frequency with received power, then can from n channel quality value, choose the measured value of maximum channel quality, promptly choose Q _Source=Max (Q _F1-source, Q _F2-source..., Q _Fn-source) as the comprehensive channel quality Q of above-mentioned Serving cell _SourceIf, characterize the channel quality of each carrier frequency with the route loss, then can from n channel quality value, choose the measured value of minimum channel quality, promptly choose Q _Source=Min (Q _F1-source, Q _F2-source..., Q _Fn-source) as the comprehensive channel quality Q of above-mentioned Serving cell _Source

Correspondingly, the concrete reality of above-mentioned step 104 also can adopt similar method:

According to the measured value size of the channel quality of each carrier frequency of above-mentioned Target cell, choose the superior of measured value as above-mentioned Target cell comprehensive channel quality Q _Target

Because the parameter type that can be used for characterizing the channel quality of a carrier frequency has a variety of, such as received power, signal to noise ratio, route loss etc., for the ease of the Q in the above-mentioned step 105 _SourceAnd Q _TargetComparison, the parameter type of channel quality of each carrier frequency that parameter type and the above-mentioned step 103 of channel quality that is used for characterizing each carrier frequency of Serving cell in the above-mentioned step 101 is used to characterize Target cell is identical.

Such as, adopt the received power of each carrier frequency of Serving cell to characterize the channel quality of this carrier frequency in the above-mentioned step 101, then above-mentioned step 103 also need to adopt Target cell the received power of each carrier frequency characterize the channel quality of this carrier frequency.

Again such as, adopt the noise of each carrier frequency of Serving cell recently to characterize the channel quality of this carrier frequency in the above-mentioned step 101, then above-mentioned step 103 also needs to adopt the noise of each carrier frequency of Target cell recently to characterize the channel quality of this carrier frequency.

From the angle to throughput contribution maximum, the measured carrier frequency of matter measures conclusive effect to communication quality with handling up, and therefore relatively the best carrier frequency of channel quality is effective.The defective of having omitted top-quality carrier frequency easily when above-mentioned method has been avoided by main carrier frequency or assistant carrier frequency comparison.

For instance, the concrete reality of above-mentioned step 102 also can adopt following method:

The measured value of the channel quality of each carrier frequency of above-mentioned Serving cell is carried out calculation process, obtain the calculation process result; With above-mentioned accumulation result as above-mentioned Serving cell comprehensive channel quality Q _Source

Correspondingly, the concrete reality of above-mentioned step 104 also can adopt similar approach:

The measured value of the channel quality of each carrier frequency of above-mentioned Target cell is carried out calculation process, obtain the calculation process result; With the comprehensive channel quality Q of above-mentioned calculation process result as above-mentioned Target cell _Target

For instance, above-mentioned Serving cell comprehensive channel quality Q _SourceCan adopt the mode of following direct summation to obtain:

$Q_{\mathrm{source}}=\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{Q}_{\mathrm{ft}-\mathrm{source}};---\left(1\right)$

Wherein, N is the carrier frequency number of Serving cell, Q _Fi-targetIt is the measured value of channel quality of i carrier frequency of Serving cell.

Correspondingly, above-mentioned Target cell comprehensive channel quality Q _TargetAlso can adopt the mode of following direct summation to obtain:

$Q_{\mathrm{traget}}=\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{Q}_{\mathrm{fi}-t\arg \mathrm{et}};---\left(2\right)$

Wherein, N is the carrier frequency number of Target cell, Q _Fi-targetIt is the measured value of channel quality of i carrier frequency of Target cell.

For instance, the comprehensive channel quality Q of above-mentioned Serving cell _SourceCan also adopt the mode of following weighted sum to obtain:

$Q_{\mathrm{source}}=\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{W}_{i-\mathrm{source}}{Q}_{\mathrm{fi}-\mathrm{source}};---\left(3\right)$

Wherein, N is the carrier frequency number of Serving cell, Q _Fi-sourceBe the measured value of channel quality of i carrier frequency of Serving cell, W _I-sourceBe the weights of the i of Serving cell at carrier frequency.

Correspondingly, above-mentioned Target cell comprehensive channel quality Q _TargetAlso can adopt the mode of following weighted sum to obtain:

$Q_{t\arg \mathrm{et}}=\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{W}_{i-t\arg \mathrm{et}}{Q}_{\mathrm{fi}-t\arg \mathrm{et}};---\left(4\right)$

Wherein, N is the carrier frequency number of Target cell, Q _Fi-targetBe the measured value of channel quality of i carrier frequency of Target cell, W _I-targetBe the weights of the i of Target cell at carrier frequency.

Because therefore the throughput that on behalf of UE, the measured value of the channel quality of measuring on carrier frequency can obtain, adopts above-mentioned method can very accurately control the opportunity of switching, make the throughput maximum on this carrier frequency.

Wherein, the condition of setting in the above-mentioned step 105 can be: Q _TargetBe better than Q _Source, perhaps Q _TargetBe better than Q _SourceWith switch sluggish and, perhaps Q _TargetThat measure skew with Target cell and be better than Q _SourceWith Serving cell measure skew and, perhaps Q _TargetThat measure skew with Target cell and be better than Q _SourceMeasure skew with Serving cell, switch sluggish and.

For instance, if adopt above-mentioned formula (1) and formula (2) to obtain Q respectively _SourceAnd Q _TargetIf perhaps adopt above-mentioned formula (3) and formula (4) to obtain Q respectively _SourceAnd Q _Target, and Q _SourceAnd Q _TargetAll adopt received power or noise recently to characterize, the condition of setting in the then above-mentioned step 105 can for:

10Log(Q _target)+CIO _target＞10Log(Q _source)+CIO _source+H _1d/2；(5)

Wherein, described H _1dFor switching sluggishness, CIO _TargetFor Target cell is measured skew, CIO _SourceFor Serving cell is measured skew; Wherein, above-mentioned CIO _TargetAnd CIO _SourceValue may be 0, H _IdValue also may be 0.

If Q _SourceAnd Q _TargetAll adopt the route loss to characterize, then above-mentioned formula (5) can be transformed to:

10Log(Q _target)+CIO _target＜10Log(Q _source)+CIO _source+H _1d/2；(6)

For instance, the concrete reality of above-mentioned step 102 can also adopt method as shown in Figure 2, and this method can comprise step:

201, utilize the signal interference ratio of each carrier frequency of measured value calculation services sub-district of the channel quality of each above-mentioned carrier frequency;

For instance, can utilize the measured value of the channel quality of each carrier frequency to add the spreading gain of each carrier frequency, and add that the receiver demodulation gain obtains the signal interference ratio of each carrier frequency.For example, can adopt following formula to obtain the signal interference ratio of each carrier frequency of Serving cell:

SIR _CPICH-dB＝Ec/N0 _CPICH-dB+G _spreading+G _rcver； (7)

Wherein, SIR _CPICH-dBWhat represent is the signal interference ratio of each carrier frequency of Serving cell; Ec/N0 _CPICH-dBThe measured value of the channel quality of each carrier frequency of expression Serving cell; G _SpreadingThe spreading gain of representing this carrier frequency, G _RcverExpression receiver demodulation gain.For UE, above-mentioned G _SpreadingAnd G _RcverBe that system is known, UE need not to measure accordingly again.

202, calculate the channel quality indication of each carrier frequency of above-mentioned Serving cell according to the signal interference ratio of each above-mentioned carrier frequency;

After above-mentioned step 201 calculates the signal interference ratio of each carrier frequency of Serving cell, can adopt following formula to calculate the channel quality indication of each carrier frequency of Serving cell

CQI＝floor(SIR _CPICH-dB+Gamma+lin2db(16/256)+4.5)； (8)

Wherein, CQI (Channel Quality Indicator) expression is the channel quality indication of each carrier frequency of Serving cell; SIR _CPICH-dBWhat represent is the signal interference ratio of each carrier frequency of Serving cell; Gamma's is the data channel power biasing of each carrier frequency of Serving cell.

203, calculation process is carried out in the channel quality indication of each carrier frequency of above-mentioned Serving cell, obtain the calculation process result; With the comprehensive channel quality Q of above-mentioned calculation process result as above-mentioned Serving cell _Source

Correspondingly, the concrete reality of above-mentioned step 104 also can adopt method as shown in Figure 3, and this method and method shown in Figure 2 are similar, can comprise step:

301, utilize the measured value of the channel quality of each above-mentioned carrier frequency to calculate the signal interference ratio of each carrier frequency of Target cell;

Wherein, the specific implementation of above-mentioned step 301 can be similar with above-mentioned step 201, and present embodiment is not repeated at this.

302, calculate the channel quality indication of each carrier frequency of Target cell according to the signal interference ratio of each above-mentioned carrier frequency;

Wherein, the specific implementation of above-mentioned step 302 can be similar with above-mentioned step 202, and present embodiment is not repeated at this.

303, calculation process is carried out in the channel quality indication of each carrier frequency of above-mentioned Target cell, obtain the calculation process result; With above-mentioned calculation process result as above-mentioned Target cell comprehensive channel quality Q _Target

For instance, obtain Serving cell comprehensive channel quality Q in the above-mentioned step 203 _SourceCan adopt the mode of following direct summation to obtain:

$Q_{\mathrm{source}}=\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{CIO}}_{\mathrm{fi}-\mathrm{source}}---\left(9\right)$

Wherein, N is the carrier frequency number of Serving cell, CIO _Fi-sourceIt is the channel quality indication of i carrier frequency of Serving cell.

Correspondingly, obtain Target cell comprehensive channel quality Q in the above-mentioned step 303 _TargetCan adopt the mode of following direct summation to obtain:

$Q_{t\arg \mathrm{et}}=\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{CIO}}_{\mathrm{fi}-t\arg \mathrm{et}}---\left(10\right)$

Wherein, N is the carrier frequency number of Target cell, CIO _Fi-targetIt is the channel quality indication of i carrier frequency of Target cell.

For instance, obtain the comprehensive channel quality Q of Serving cell in the above-mentioned step 203 _SourceCan also adopt the mode of following weighted sum to obtain:

$Q_{\mathrm{source}}=\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{W}_{i-\mathrm{source}}{\mathrm{CIO}}_{\mathrm{fi}-\mathrm{source}}---\left(11\right)$

Wherein, N is the carrier frequency number of Serving cell, CIO _Fi-sourceBe the channel quality indication of i carrier frequency of Serving cell, W _I-sourceBe the weights of i carrier frequency of Serving cell.

Correspondingly, obtain Target cell comprehensive channel quality Q in the above-mentioned step 303 _TargetAlso can adopt the mode of following weighted sum to obtain:

$Q_{t\arg \mathrm{et}}=\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{W}_{i-t\arg \mathrm{et}}{\mathrm{ICO}}_{\mathrm{fi}-t\arg \mathrm{et}}---\left(12\right)$

Wherein, N is the carrier frequency number of Target cell, CIO _Fi-targetBe the channel quality indication of i carrier frequency of Target cell, W _I-targetBe the weights of the i of Target cell at carrier frequency.

Because the channel quality of measuring on carrier frequency indication can represent UE in this carrier frequency upper signal channel quality, therefore, adopt Fig. 2 and method shown in Figure 3 also can very accurately control the opportunity of switching, make the throughput maximum.

For instance, the concrete reality of above-mentioned step 102 can also adopt method as shown in Figure 4, and this method can comprise step:

Step 401～step 402 is identical with above-mentioned step 201～step 202;

403,, obtain the transmission block size of each carrier frequency of above-mentioned Serving cell according to the corresponding relation of channel quality indication with the transmission block size;

For instance, and channel quality indication (CQI) and transmission block size (Transport Block Size, corresponding relation TBS) can be prenoticed to UE by network side, and UE can inquire corresponding TBS according to the CQI of each carrier frequency of Serving cell like this.

404, the transmission block size of each carrier frequency of above-mentioned Serving cell is carried out calculation process, obtain the calculation process result; With the comprehensive channel quality Q of above-mentioned calculation process result as described Serving cell _Source

For instance, the transmission block size of each carrier frequency of the above-mentioned Serving cell that can directly add up obtains accumulation result; With above-mentioned accumulation result as above-mentioned Serving cell comprehensive channel quality Q _Source

Perhaps, the result of product of the transmission block of each carrier frequency of first calculation services sub-district size and these carrier frequency weights; And then the result of product of the transmission block of each carrier frequency that adds up size and these carrier frequency weights, with accumulation result as above-mentioned Serving cell comprehensive channel quality Q _Source

Correspondingly, the concrete reality of above-mentioned step 104 can also adopt method as shown in Figure 5, and this method and method shown in Figure 4 are similar, can comprise step:

Step 501～step 502 is similar with above-mentioned step 301～step 302;

503,, obtain the transmission block size of each carrier frequency of above-mentioned Target cell according to the corresponding relation of channel quality indication with the transmission block size;

504, the transmission block size of each carrier frequency of above-mentioned Target cell is carried out calculation process, obtain the calculation process result; With the comprehensive channel quality Q of above-mentioned calculation process result as described Target cell _Target

Wherein, the specific implementation of above-mentioned step 504 can be similar with above-mentioned step 404, and present embodiment is not repeated at this.

Fig. 4 and method shown in Figure 5 are the angles of main carrier frequency and assistant carrier frequency throughput sum from overloading frequency throughput, choose corresponding TBS according to each carrier frequency (comprising main carrier frequency and assistant carrier frequency) channel quality value of measuring, summation to all carrier frequency correspondences, and compare, make the throughput maximum opportunity that can control switching more accurately.

Obtain Serving cell comprehensive channel quality Q if adopt above-mentioned Fig. 2 mode _SourceAnd adopt Fig. 3 mode to obtain Target cell comprehensive channel quality Q _Target, perhaps adopt Fig. 4 mode to obtain Serving cell comprehensive channel quality Q _SourceAnd adopt Fig. 5 mode to obtain Target cell comprehensive channel quality Q _Target, and Q _SourceAnd Q _TargetAll adopt received power or noise recently to characterize, the condition that is provided with in the then above-mentioned step 105 can for:

Q _target+CIO _target＞Q _source+CIO _source+H _1d/2； (13)

Wherein, described H _1dFor switching sluggishness, CIO _TargetFor Target cell is measured skew, CIO _SourceFor Serving cell is measured skew; Wherein, above-mentioned CIO _TargetAnd CIO _SourceValue may be 0, H _1dValue also may be 0.

If Q _SourceAnd Q _TargetAll adopt the route loss to characterize, then above-mentioned formula (13) can be transformed to:

Q _target+CIO _target＜Q _source+CIO _source+H _1d/2； (14)

Further, the changing method that provides of the embodiment of the invention can be at Q _SourceAnd Q _TargetBetween after the condition that satisfy to be provided with, can further judge Q _SourceAnd Q _TargetBetween this state of condition that satisfy to be provided with whether last till the time value that presets, if arrive, further informing network side more then is so that network switches to Target cell with terminal from Serving cell; If no show then need not the informing network side.Like this, can prevent to have reduced system effectiveness because of the switching of the repeatedly Serving cell that brings of sudden change fast of the channel quality of carrier frequency.

Such as, a Time-To-Trigger timer can be preset in UE this locality, works as Q _SourceAnd Q _TargetBetween satisfy to be provided with condition the time, start this Time-To-Trigger timer; After this Time-To-Trigger timer starts, if Q _SourceAnd Q _TargetBetween the condition that satisfy not to be provided with, then timer stops and zero clearing; If Q _SourceAnd Q _TargetBetween the condition that satisfy to be provided with, and last till timer preset time value always, then UE determines that this moment, can the informing network side to satisfy switching condition.

In addition, the embodiment of the invention can be chosen measured value the maximum as above-mentioned Serving cell comprehensive channel quality Q according to the measured value size of the channel quality of each carrier frequency of above-mentioned Serving cell _SourceThe measured value of the channel quality of each carrier frequency of measurement target sub-district is as a comprehensive channel quality Q of Target cell _TargetRespectively with Serving cell comprehensive channel quality Q _SourceEach comprehensive channel quality Q with Target cell _TargetSubstitution formula (5) or formula (6), as long as formula (5) or formula (6) are set up, and the time that continues arrive and last till timer preset time value, then UE determines that this moment is to satisfy switching condition, can the informing network side, so that network side switches to Target cell with terminal from Serving cell.

The embodiment of the invention one is that executive agent is an example with the terminal, introduce a kind of changing method that the embodiment of the invention provides, the embodiment of the invention is no longer dependent on the switching that only the main carrier measurement of Serving cell and Target cell is triggered Serving cell, but all carrier waves of Serving cell and Target cell are all carried out comprehensive assessment, obtained comparing after the comprehensive channel quality of Serving cell and Target cell, and come triggering terminal to switch according to comparative result, the channel quality that can evade the assistant carrier frequency of the Target cell after the switching like this is worse than the problem of the assistant carrier frequency channel quality of Serving cell far away, improve the accuracy that Serving cell switches, and then can improve the communication quality of terminal.

Embodiment two:

See also Fig. 6, a kind of changing method flow chart that Fig. 6 provides for the embodiment of the invention two.As shown in Figure 6, this method can comprise step:

601, the channel quality of each carrier frequency of the Serving cell that reports of receiving terminal, and the channel quality of each carrier frequency of Target cell;

602, according to the comprehensive channel quality Q of the described Serving cell of channel quality assessment of each carrier frequency of above-mentioned Serving cell _Source

603, according to the comprehensive channel quality Q of the described Target cell of channel quality assessment of each carrier frequency of above-mentioned Target cell _Target

604, at above-mentioned Q _SourceAnd Q _TargetBetween satisfy to be provided with the time, then terminal is switched to Target cell from Serving cell.

Wherein, there is not order successively between above-mentioned step 602 and the step 603.

Further, the changing method that provides of present embodiment two can also be at above-mentioned Q _SourceWith above-mentioned Q _TargetBetween after the condition that satisfy to set, further judge above-mentioned Q _SourceWith above-mentioned Q _TargetBetween satisfy this state impose a condition and whether last till the time value that presets, if arrive, further terminal is switched to Target cell from Serving cell again; If no show is not then switched.Like this, can prevent to have reduced system effectiveness because of the switching of the repeatedly Serving cell that brings of sudden change fast of the channel quality of carrier frequency.

Under above-mentioned sight such as, network side can preset a Time-To-Trigger timer, as last Q _SourceAnd Q _TargetBetween satisfy to set condition the time, start this Time-To-Trigger timer; After this Time-To-Trigger timer starts, if Q _SourceAnd Q _TargetBetween condition that satisfy not set, then timer stops and zero clearing; If Q _SourceAnd Q _TargetBetween condition that satisfy to set, and last till timer preset time value always, then network side is determined to satisfy switching condition, terminal to be switched to Target cell from Serving cell this moment.

For instance, the concrete reality of above-mentioned step 602 can adopt following method:

According to the measured value size of the channel quality of each carrier frequency of the Serving cell that receives in the above-mentioned step 601, choose the superior of measured value as above-mentioned Serving cell comprehensive channel quality Q _Source

Correspondingly, above-mentioned step 603 also can adopt following similar approach:

According to the measured value size of the channel quality of each carrier frequency of the Target cell that receives in the above-mentioned step 601, choose the superior of measured value as described Target cell comprehensive channel quality Q _Target

Because the parameter that can be used for characterizing the channel quality of a carrier frequency has a variety of, such as received power, signal to noise ratio, route loss etc., for the ease of the Q in the above-mentioned step 604 _SourceAnd Q _TargetComparison, the parameter type of channel quality that is used to characterize each carrier frequency of Serving cell in the above-mentioned step 601 need be identical with the parameter type of the channel quality of each carrier frequency that is used to characterize Target cell.

Wherein, network side can indicate UE to be used to characterize the parameter of channel quality with relevant signaling or employing designated lane between the UE by expansion, the form that measured value adopted of UE reporting channel quality be can also further indicate, as absolute value, relative value or absolute value+relative value reported.

For instance, the concrete reality of above-mentioned step 602 also can adopt following method:

The measured value of the channel quality of each carrier frequency of above-mentioned Serving cell is carried out calculation process, obtain the calculation process result;

With above-mentioned calculation process result as above-mentioned Serving cell comprehensive channel quality Q _Source

Correspondingly, the concrete reality of above-mentioned step 603 also can adopt similar approach:

The measured value of the channel quality of each carrier frequency of above-mentioned Target cell is carried out calculation process, obtain the calculation process result;

With above-mentioned calculation process result as above-mentioned Target cell comprehensive channel quality Q _Target

Obtain Serving cell comprehensive channel quality Q if adopt above-mentioned mode _SourceAnd Target cell comprehensive channel quality Q _Target, the part of setting in the then above-mentioned step 604 can adopt formula (5) or formula (6), if Serving cell comprehensive channel quality Q _SourceAnd Target cell comprehensive channel quality Q _TargetSatisfy formula (5) or formula (6), then terminal is switched to Target cell from Serving cell; Otherwise, then do not switch.

For instance, the concrete reality of above-mentioned step 602 also can adopt method as shown in Figure 2 to obtain Serving cell comprehensive channel quality Q _Source

Correspondingly, the concrete reality of above-mentioned step 603 also can adopt method as shown in Figure 3 to obtain Target cell comprehensive channel quality Q _TargetPresent embodiment is not repeated at this.

For instance, the concrete reality of above-mentioned step 602 can also adopt method as shown in Figure 4 to obtain Serving cell comprehensive channel quality Q _Source

Correspondingly, the concrete reality of above-mentioned step 603 also can adopt method as shown in Figure 5 to obtain Target cell comprehensive channel quality Q _TargetPresent embodiment is not repeated at this.

Obtain Serving cell comprehensive channel quality Q if adopt above-mentioned Fig. 2 mode _SourceAnd adopt Fig. 3 mode to obtain Target cell comprehensive channel quality Q _Target, perhaps adopt Fig. 4 mode to obtain Serving cell comprehensive channel quality Q _SourceAnd adopt Fig. 5 mode to obtain Target cell comprehensive channel quality Q _Target, the condition of setting in the then above-mentioned step 604 can adopt formula (13) or formula (14), if Serving cell comprehensive channel quality Q _SourceAnd Target cell comprehensive channel quality Q _TargetSatisfy formula (13) or formula (14), then terminal is switched to Target cell from Serving cell; Otherwise, then do not switch.

The embodiment of the invention two is that executive agent is an example with the network side, introduced a kind of changing method that the embodiment of the invention provides, the embodiment of the invention is no longer dependent on the switching that only the main carrier measurement of Serving cell and Target cell is triggered Serving cell, but all carrier waves of Serving cell and Target cell are all carried out comprehensive assessment, obtained comparing after the comprehensive channel quality of Serving cell and Target cell, and trigger Serving cell according to comparative result and switch, the problem that the channel quality that can evade the assistant carrier frequency of the Target cell after the switching like this is worse than the assistant carrier frequency channel quality of Serving cell far away occurs, improve the accuracy that Serving cell switches, and then can improve the communication quality of terminal.

Embodiment three:

See also Fig. 7 a, the structure chart of a kind of terminal that Fig. 7 a provides for the embodiment of the invention three.Shown in Fig. 7 a, this terminal can comprise:

First measuring unit 701 is used for the channel quality of each carrier frequency of the Serving cell of measuring terminals;

First assessment unit 702 is used for the comprehensive channel quality Q according to the channel quality assessment Serving cell of first measuring unit, 701 measurements _Source

Second measuring unit 703 is used for the channel quality of each carrier frequency of measurement target sub-district;

Second assessment unit 704 is used for the comprehensive channel quality Q according to the channel quality assessment Target cell of second measuring unit, 703 measurements _Target

First judging unit 705 is used to judge above-mentioned Q _SourceAnd Q _TargetBetween whether satisfy the condition of setting;

Notification unit 706 is used in the judged result of the first above-mentioned judging unit 705 when being, the informing network side is so that network side switches to Target cell with terminal from Serving cell.

See also Fig. 7 b, the another kind of terminal structure figure that Fig. 7 b provides for the embodiment of the invention three.Compare with the terminal shown in Fig. 7 a, the terminal shown in Fig. 7 b has increased by one second judging unit 707;

Wherein, second judging unit 707 is used in the judged result of the first above-mentioned judging unit 705 judging above-mentioned Q when being _SourceWith above-mentioned Q _TargetBetween the state of condition that satisfy to set whether last till the preset time value;

Notification unit 706, the judged result that specifically is used at first judging unit 705 and second judging unit 707 is when being, and the informing network side is so that network side switches to Target cell with terminal from Serving cell.

See also Fig. 8 a, a kind of structure chart of first assessment unit 702 that provides in the embodiment of the invention two is provided Fig. 8 a.Shown in Fig. 8 a, the first above-mentioned assessment unit 702 can comprise:

First chooses subelement 7021, is used for the measured value size according to the channel quality of each carrier frequency of above-mentioned Serving cell, chooses the superior of measured value as above-mentioned Serving cell comprehensive channel quality Q _Source

Correspondingly, see also Fig. 8 b, a kind of structure chart of single 704 yuan of second assessment that provides in the embodiment of the invention two is provided Fig. 8 b.Shown in Fig. 8 b, the second above-mentioned assessment unit 704 can comprise:

Second chooses subelement 7041, according to the measured value size of the channel quality of each carrier frequency of above-mentioned Target cell, chooses the superior of measured value as above-mentioned Target cell comprehensive channel quality Q _Target

For the ease of the Q in the first above-mentioned judging unit 705 _SourceAnd Q _TargetComparison, being used in the first above-mentioned measuring unit 701 characterizes the parameter type of channel quality of each carrier frequency of Serving cell need be identical with the parameter type of the channel quality of each carrier frequency of the Target cell that is used to characterize of second measuring unit 703.

See also Fig. 9 a, the another kind of structure chart of first assessment unit 702 that provides in the embodiment of the invention two is provided Fig. 9 a.Shown in Fig. 9 a, the first above-mentioned assessment unit 702 can comprise:

The first calculation process subelement 7022 is used for the measured value of the channel quality of each carrier frequency of above-mentioned Serving cell is carried out calculation process, obtains the calculation process result; With above-mentioned calculation process result as above-mentioned Serving cell comprehensive channel quality Q _Source

Correspondingly, see also Fig. 9 b, the another kind of structure chart of second assessment unit 704 that provides in the embodiment of the invention two is provided Fig. 9 b.Shown in Fig. 9 b, the second above-mentioned assessment unit 704 can comprise:

The second calculation process subelement 7042 is used for the measured value of the channel quality of each carrier frequency of above-mentioned Target cell is carried out calculation process, obtains the calculation process result; With above-mentioned calculation process result as above-mentioned Target cell comprehensive channel quality Q _Target

For instance, the first above-mentioned judge module 705 specifically can be used to judge above-mentioned Q _SourceAnd Q _TargetBetween whether satisfy formula (5) or formula (6).

See also Figure 10 a, the another kind of structure chart of first assessment unit 702 that provides in the embodiment of the invention two is provided Figure 10 a.Shown in Figure 10 a, the first above-mentioned assessment unit 702 can comprise:

First computation subunit 7023 is used to utilize the signal interference ratio of each carrier frequency of measured value calculation services sub-district of the channel quality of each above-mentioned carrier frequency; Calculate the channel quality indication of each carrier frequency of described Serving cell according to the signal interference ratio of each above-mentioned carrier frequency;

The 3rd calculation process subelement 7024 is used for calculation process is carried out in the channel quality indication of each carrier frequency of above-mentioned Serving cell, obtains the calculation process result; With above-mentioned operation result as above-mentioned Serving cell comprehensive channel quality Q _Source

Correspondingly, see also Figure 10 b, the another kind of structure chart of second assessment unit 704 that provides in the embodiment of the invention two is provided Figure 10 b.Shown in Figure 10 b, the second above-mentioned assessment unit 704 can comprise:

Second computation subunit 7043 is used to utilize the measured value of the channel quality of each above-mentioned carrier frequency to calculate the signal interference ratio of each carrier frequency of Target cell; Calculate the channel quality indication of each carrier frequency of above-mentioned Target cell according to the signal interference ratio of each above-mentioned carrier frequency;

The 4th calculation process subelement 7044 is used for calculation process is carried out in the channel quality indication of each carrier frequency of above-mentioned Target cell, obtains the calculation process result; With above-mentioned calculation process result as above-mentioned Target cell comprehensive channel quality Q _Target

See also Figure 11 a, the another kind of structure chart of first assessment unit 702 that provides in the embodiment of the invention two is provided Figure 11 a.Shown in Figure 11 a, the first above-mentioned assessment unit 702 can comprise:

The 3rd computation subunit 7025 is used to utilize the signal interference ratio of each carrier frequency of measured value calculation services sub-district of the channel quality of each above-mentioned carrier frequency; Calculate the channel quality indication of each carrier frequency of above-mentioned Serving cell according to the signal interference ratio of each above-mentioned carrier frequency;

First obtains subelement 7026, is used for obtaining the transmission block size of each carrier frequency of above-mentioned Serving cell according to the corresponding relation of channel quality indication with the transmission block size;

The 5th calculation process subelement 7027 is used for the transmission block size of each carrier frequency of above-mentioned Serving cell is carried out calculation process, obtains the calculation process result; With above-mentioned calculation process result as above-mentioned Serving cell comprehensive channel quality Q _Source

Correspondingly, see also Figure 11 b, the another kind of structure chart of second assessment unit 704 that provides in the embodiment of the invention two is provided Figure 11 b.Shown in Figure 11 b, the second above-mentioned assessment unit 704 can comprise:

The 4th computation subunit 7045 is used to utilize the measured value of the channel quality of each above-mentioned carrier frequency to calculate the signal interference ratio of each carrier frequency of Target cell; Calculate the channel quality indication of each carrier frequency of above-mentioned Target cell according to the signal interference ratio of each above-mentioned carrier frequency;

Second obtains subelement 7046, according to the corresponding relation of channel quality indication with the transmission block size, obtains the transmission block size of each carrier frequency of above-mentioned Target cell;

The 6th calculation process subelement 7047 is used for the transmission block size of each carrier frequency of above-mentioned Target cell is carried out calculation process, obtains the calculation process result; With above-mentioned calculation process result as above-mentioned Target cell comprehensive channel quality Q _Target

See also Figure 11 c, a kind of structure chart of first judging unit 705 that provides in the embodiment of the invention two is provided Figure 11 c.Shown in Figure 11 c, it is one of following that the first above-mentioned judging unit 705 can comprise::

First judgment sub-unit 7051 is used to judge above-mentioned Q _TargetWhether be better than above-mentioned Q _Source

Second judgment sub-unit 7052 is used to judge above-mentioned Q _TargetWhether be better than above-mentioned Q _SourceWith switch sluggish and;

The 3rd judgment sub-unit 7053 is used to judge above-mentioned Q _TargetThat measure skew with Target cell and whether be better than above-mentioned Q _SourceWith Serving cell measure skew and;

The 4th judgment sub-unit is used to judge above-mentioned Q _TargetThat measure skew with Target cell and whether be better than above-mentioned Q _SourceMeasure skew with Serving cell, switch sluggish and.

A kind of terminal that the embodiment of the invention three provides, be no longer dependent on the switching that only the main carrier measurement of Serving cell and Target cell is triggered Serving cell, but all carrier waves of Serving cell and Target cell are all carried out comprehensive assessment, obtained comparing after the comprehensive channel quality of Serving cell and Target cell, and trigger Serving cell according to comparative result and switch, the problem that the channel quality that can evade the assistant carrier frequency of the Target cell after the switching like this is worse than the assistant carrier frequency channel quality of Serving cell far away occurs, the accuracy that terminal is switched can be improved, and then the communication quality of terminal can be improved.

Embodiment four:

See also Figure 12 a, a kind of network equipment structure chart that Figure 12 a provides for the embodiment of the invention four.Shown in Figure 12 a, this network equipment can comprise:

Receiving element 1201 is used for the channel quality of each carrier frequency of the Serving cell that receiving terminal reports and the channel quality of each carrier frequency of Target cell;

The 3rd assessment unit 1202 is used for the comprehensive channel quality Q according to the described Serving cell of channel quality assessment of each carrier frequency of above-mentioned Serving cell _Source

The 4th assessment unit 1203 is used for the comprehensive channel quality Q according to the described Target cell of channel quality assessment of each carrier frequency of above-mentioned Target cell _Target

The 3rd judging unit 1204 is used to judge above-mentioned Q _SourceWith above-mentioned Q _TargetBetween whether satisfy the condition of setting;

Switch unit 1205 is used in the judged result of the 3rd above-mentioned judging unit 1204 for being then terminal to be switched to Target cell from Serving cell.

See also Figure 12 b, the another kind of network equipment structure chart that Figure 12 b provides for the embodiment of the invention four.Compare with the network equipment shown in Figure 12 a, the network equipment shown in Figure 12 b has increased by one the 4th judging unit 1206;

Wherein, the 4th judging unit 1206 is used in the judged result of the 3rd above-mentioned judging unit 1204 further judging Q when being _SourceAnd Q _TargetBetween satisfy the state impose a condition and whether last till the preset time value;

Switch unit 1205, the judged result that specifically is used at the 3rd judging unit 1204 and the 4th judging unit 1206 is when being, terminal is switched to above-mentioned Target cell from Serving cell.

See also Figure 13 a, a kind of structure chart of the 3rd assessment unit that provides in the embodiment of the invention four is provided Figure 13 a.Shown in Figure 13 a, the 3rd above-mentioned assessment unit 1202 can comprise:

The 3rd chooses subelement 12021, is used for the size according to the measured value of the channel quality of each carrier frequency of above-mentioned Serving cell, chooses the superior of measured value as above-mentioned Serving cell comprehensive channel quality Q _Source

Correspondingly, see also Figure 13 b, a kind of structure chart of the 4th assessment unit that provides in the embodiment of the invention four is provided Figure 13 b.Shown in Figure 13 b, the 4th above-mentioned assessment unit 1203 can comprise:

The 4th chooses subelement 22031, is used for the size according to the channel quality measurements of each carrier frequency of above-mentioned Target cell, chooses the superior of measured value as above-mentioned Target cell comprehensive channel quality Q _Target

Wherein, for the ease of the Q in the 3rd above-mentioned judging unit 1204 _SourceAnd Q _TargetComparison, the parameter type of channel quality that is used to characterize each carrier frequency of Serving cell in the above-mentioned receiving element 1201 need be identical with the parameter type of the channel quality of each carrier frequency that is used to characterize Target cell.

See also Figure 14 a, the another kind of structure chart of the 3rd assessment unit that provides in the embodiment of the invention four is provided Figure 14 a.Shown in Figure 14 a, the 3rd above-mentioned assessment unit 1202 can comprise:

First handles subelement 12022, is used for the measured value of the channel quality of each carrier frequency of above-mentioned Serving cell is carried out calculation process, obtains the calculation process result; With above-mentioned calculation process result as above-mentioned Serving cell comprehensive channel quality Q _Sourc

Correspondingly, see also Figure 14 b, the another kind of structure chart of the 4th assessment unit that provides in the embodiment of the invention four is provided Figure 14 b.Shown in Figure 14 b, the 4th above-mentioned assessment unit 1203 can comprise:

Second handles subelement 12032, is used for the measured value of the channel quality of each carrier frequency of above-mentioned Target cell is carried out calculation process, obtains the calculation process result; With above-mentioned calculation process result as above-mentioned Target cell comprehensive channel quality Q _Target

See also Figure 15 a, the another kind of structure chart of the 3rd assessment unit that provides in the embodiment of the invention four is provided Figure 15 a.Shown in Figure 15 a, the 3rd above-mentioned assessment unit 1202 can comprise:

The 3rd handles subelement 12023, is used for calculating according to the measured value of the channel quality of each carrier frequency of above-mentioned Serving cell the signal interference ratio of each carrier frequency of above-mentioned Serving cell; Calculate the channel quality indication of each carrier frequency of described Serving cell according to the signal interference ratio of each above-mentioned carrier frequency;

The manages subelement 12024 everywhere, is used for calculation process is carried out in the channel quality indication of each carrier frequency of above-mentioned Serving cell, obtains the calculation process result; With above-mentioned calculation process result as above-mentioned Serving cell comprehensive channel quality Q _Source

Correspondingly, see also Figure 15 b, the another kind of structure chart of the 4th assessment unit that provides in the embodiment of the invention four is provided Figure 15 b.Shown in Figure 15 b, the 4th above-mentioned assessment unit 1203 can comprise:

The 5th handles subelement 12033, is used for calculating according to the measured value of the channel quality of each carrier frequency of above-mentioned Target cell the signal interference ratio of each carrier frequency of above-mentioned Target cell; Calculate the channel quality indication of each carrier frequency of above-mentioned Target cell according to the signal interference ratio of each above-mentioned carrier frequency;

The 6th handles subelement 12034, is used for calculation process is carried out in the channel quality indication of each carrier frequency of above-mentioned Target cell, obtains the calculation process result; With above-mentioned calculation process result as above-mentioned Target cell comprehensive channel quality Q _Target

See also Figure 16 a, the another kind of structure chart of the 3rd assessment unit that provides in the embodiment of the invention four is provided Figure 16 a.Shown in Figure 16 a, the 3rd above-mentioned assessment unit 1202 can comprise:

The 7th handles subelement 12025, is used for calculating according to the measured value of the channel quality of each carrier frequency of above-mentioned Serving cell the signal interference ratio of each carrier frequency of above-mentioned Serving cell; Calculate the channel quality indication of each carrier frequency of above-mentioned Serving cell according to the signal interference ratio of each above-mentioned carrier frequency; According to the corresponding relation of channel quality indication, obtain the transmission block size of each carrier frequency of above-mentioned Serving cell with the transmission block size;

The 8th handles subelement 12026, and the transmission block size of each carrier frequency of above-mentioned Serving cell is carried out calculation process, obtains the calculation process result; With above-mentioned calculation process result as described Serving cell comprehensive channel quality Q _Source

Correspondingly, see also Figure 16 b, the another kind of structure chart of the 4th assessment unit that provides in the embodiment of the invention four is provided Figure 16 b.Shown in Figure 16 b, the 4th above-mentioned assessment unit 1203 can comprise:

The 9th handles subelement 12035, is used for calculating according to the measured value of the channel quality of each carrier frequency of above-mentioned Target cell the signal interference ratio of each carrier frequency of above-mentioned Target cell; Calculate the channel quality indication of each carrier frequency of above-mentioned Target cell according to the signal interference ratio of each above-mentioned carrier frequency; According to the corresponding relation of channel quality indication, obtain the transmission block size of each carrier frequency of above-mentioned Target cell with the transmission block size;

The tenth handles subelement 12036, is used for the transmission block size of each carrier frequency of above-mentioned Target cell is carried out calculation process, obtains the calculation process result; With above-mentioned calculation process result as above-mentioned Target cell comprehensive channel quality Q _Target

See also Figure 16 c, a kind of structure chart of the 3rd judging unit 1204 that provides in the embodiment of the invention four is provided Figure 11 c.Shown in Figure 16 c, it is one of following that the 3rd above-mentioned judging unit 1204 can comprise::

The 5th judgment sub-unit 12041 is used to judge above-mentioned Q _TargetWhether be better than above-mentioned Q _Source

The 6th judgment sub-unit 12042 is used to judge above-mentioned Q _TargetWhether be better than above-mentioned Q _SourceWith switch sluggish and;

The 7th judgment sub-unit 12043 is used to judge above-mentioned Q _TargetThat measure skew with Target cell and whether be better than above-mentioned Q _SourceWith Serving cell measure skew and;

The 8th judgment sub-unit 12044 is used to judge above-mentioned Q _TargetThat measure skew with Target cell and whether be better than above-mentioned Q _SourceMeasure skew with Serving cell, switch sluggish and.

A kind of network equipment that the embodiment of the invention four provides is no longer dependent on the switching that only the main carrier measurement of Serving cell and Target cell is triggered Serving cell, but all carrier waves of Serving cell and Target cell are all carried out comprehensive assessment, obtained comparing after the comprehensive channel quality of Serving cell and Target cell, and trigger Serving cell according to comparative result and switch, the problem that the channel quality that can evade the assistant carrier frequency of the Target cell after the switching like this is worse than the assistant carrier frequency channel quality of Serving cell far away occurs, thereby can improve the accuracy that terminal is switched, and then can improve the communication quality of terminal.

One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: read-only memory (Read Only Memory, ROM), random access device (Random Access Memory, RAM), various media that can be program code stored such as magnetic disc or CD.

More than a kind of changing method that the embodiment of the invention provided and terminal, the network equipment are described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims (16)

1. a changing method is characterized in that, comprising:

The channel quality of each carrier frequency of the Serving cell of measuring terminals;

Comprehensive channel quality Q according to the channel quality assessment Serving cell of each carrier frequency of described Serving cell _Source

The channel quality of each carrier frequency of measurement target sub-district;

Comprehensive channel quality Q according to the channel quality assessment Target cell of each carrier frequency of described Target cell _Target

At described Q _SourceWith described Q _TargetWhen satisfying the condition of setting, the informing network side is so that network side switches to Target cell with described terminal from Serving cell.

2. the method for claim 1 is characterized in that, at described Q _SourceWith described Q _TargetWhen satisfying the condition of setting, described method also comprises:

Judge described Q _SourceWith described Q _TargetBetween satisfy the state impose a condition and whether last till the preset time value;

And described informing network side comprises:

At described Q _SourceWith described Q _TargetSatisfy the condition of setting, and described Q _SourceWith described Q _TargetBetween when satisfying the state continuance impose a condition to the preset time value, the informing network side.

3. method as claimed in claim 1 or 2 is characterized in that, according to the comprehensive channel quality Q of the channel quality assessment Serving cell of each carrier frequency of described Serving cell _SourceStep comprise:

According to the measured value size of the channel quality of each carrier frequency of described Serving cell, choose the comprehensive channel quality Q of the superior of measured value as described Serving cell _Source

Comprehensive channel quality Q according to the channel quality assessment Target cell of each carrier frequency of described Target cell _TargetStep comprise:

According to the measured value size of the channel quality of each carrier frequency of described Target cell, choose the comprehensive channel quality Q of the superior of measured value as described Target cell _Target

4. method as claimed in claim 1 or 2 is characterized in that, according to the comprehensive channel quality Q of the channel quality assessment Serving cell of each carrier frequency of described Serving cell _SourceStep comprise:

The measured value of the channel quality of each carrier frequency of described Serving cell is carried out calculation process, obtain the calculation process result;

With the comprehensive channel quality Q of described calculation process result as described Serving cell _Source

Comprehensive channel quality Q according to the channel quality assessment Target cell of each carrier frequency of described Target cell _TargetStep comprise:

The measured value of the channel quality of each carrier frequency of described Target cell is carried out calculation process, obtain the calculation process result;

With the comprehensive channel quality Q of described calculation process result as described Target cell _Target

5. method as claimed in claim 1 or 2 is characterized in that, according to the comprehensive channel quality Q of the channel quality assessment Serving cell of each carrier frequency of described Serving cell _SourceStep comprise:

Utilize the measured value of channel quality of each carrier frequency of described Serving cell to calculate the signal interference ratio of each carrier frequency of described Serving cell;

Calculate the channel quality indication of each carrier frequency of described Serving cell according to the signal interference ratio of each carrier frequency of described Serving cell;

Calculation process is carried out in the channel quality indication of each carrier frequency of described Serving cell, obtain the calculation process result;

With the comprehensive channel quality Q of described calculation process result as described Serving cell _Source

Comprehensive channel quality Q according to the channel quality assessment Target cell of each carrier frequency of described Target cell _TargetStep comprise:

Utilize the measured value of channel quality of each carrier frequency of described Target cell to calculate the signal interference ratio of each carrier frequency of described Target cell;

Calculate the channel quality indication of each carrier frequency of described Target cell according to the signal interference ratio of each carrier frequency of described Target cell;

Calculation process is carried out in the channel quality indication of each carrier frequency of described Target cell, obtain the calculation process result;

With the comprehensive channel quality Q of described calculation process result as described Target cell _Target

6. method as claimed in claim 1 or 2 is characterized in that, according to the comprehensive channel quality Q of the channel quality assessment Serving cell of each carrier frequency of described Serving cell _SourceStep comprise:

Utilize the measured value of channel quality of each carrier frequency of described Serving cell to calculate the signal interference ratio of each carrier frequency of described Serving cell;

Calculate the channel quality indication of each carrier frequency of described Serving cell according to the signal interference ratio of each carrier frequency of described Serving cell;

According to the corresponding relation of channel quality indication, obtain the transmission block size of each carrier frequency of described Serving cell with the transmission block size;

The transmission block size of each carrier frequency of described Serving cell is carried out calculation process, obtain the calculation process result;

With the comprehensive channel quality Q of described calculation process result as described Serving cell _Source

Comprehensive channel quality Q according to the channel quality assessment Target cell of each carrier frequency of described Target cell _TargetStep comprise:

Utilize the measured value of channel quality of each carrier frequency of described Target cell to calculate the signal interference ratio of each carrier frequency of described Target cell;

Calculate the channel quality indication of each carrier frequency of described Target cell according to the signal interference ratio of each carrier frequency of described Target cell;

According to the corresponding relation of channel quality indication, obtain the transmission block size of each carrier frequency of described Target cell with the transmission block size;

The transmission block size of each carrier frequency of described Target cell is carried out calculation process, obtain the calculation process result;

With the comprehensive channel quality Q of described calculation process result as described Target cell _Target

7. method as claimed in claim 1 or 2 is characterized in that the condition of described setting comprises described Q _TargetBe better than described Q _SourcePerhaps described Q _TargetBe better than described Q _SourceWith switch sluggish and; Perhaps described Q _TargetThat measure skew with described Target cell and be better than described Q _SourceWith described Serving cell measure skew and; Perhaps described Q _TargetThat measure skew with described Target cell and be better than described Q _SourceMeasure skew with described Serving cell, switch sluggish and.

8. a changing method is characterized in that, comprising:

The channel quality of each carrier frequency of the Serving cell that receiving terminal reports, and the channel quality of each carrier frequency of Target cell;

Comprehensive channel quality Q according to the described Serving cell of channel quality assessment of each carrier frequency of described Serving cell _Source

Comprehensive channel quality Q according to the described Target cell of channel quality assessment of each carrier frequency of described Target cell _Target

At described Q _SourceWith described Q _TargetWhen satisfying the condition of setting, then described terminal is switched to Target cell from Serving cell.

9. a terminal is characterized in that, comprising:

First measuring unit is used to measure the channel quality of each carrier frequency of the Serving cell of this terminal;

First assessment unit is used for the comprehensive channel quality Q according to the channel quality assessment Serving cell of each carrier frequency of described Serving cell _Source

Second measuring unit is used for the channel quality of each carrier frequency of measurement target sub-district;

Second assessment unit is used for the comprehensive channel quality Q according to the channel quality assessment Target cell of each carrier frequency of described Target cell _Target

First judging unit is used to judge described Q _SourceWith described Q _TargetBetween whether satisfy the condition of setting;

Notification unit is used in the judged result of described first judging unit when being, the informing network side is so that network side switches to Target cell with terminal from Serving cell.

10. terminal as claimed in claim 9 is characterized in that, also comprises:

Second judging unit is used in the judged result of described first judging unit judging described Q when being _SourceWith described Q _TargetBetween satisfy the state impose a condition and whether last till the preset time value;

Described notification unit, the judged result that specifically is used at described first judging unit and described second judging unit is when being, and the informing network side is so that network side switches to Target cell with described terminal from Serving cell.

11., it is characterized in that described first assessment unit comprises as claim 9 or 10 described terminals:

First chooses subelement, is used for the measured value size according to the channel quality of each carrier frequency of described Serving cell, chooses the comprehensive channel quality Q of the superior of measured value as described Serving cell _Source

Described second assessment unit comprises:

Second chooses subelement, is used for the measured value size according to the channel quality of each carrier frequency of described Target cell, chooses the comprehensive channel quality Q of the superior of measured value as described Target cell _Target

12., it is characterized in that described first assessment unit comprises as claim 9 or 10 described terminals:

The first calculation process subelement is used for the measured value of the channel quality of each carrier frequency of described Serving cell is carried out calculation process, obtains the calculation process result; With the comprehensive channel quality Q of described calculation process result as described Serving cell _Source

Described second assessment unit comprises:

The second calculation process subelement is used for the measured value of the channel quality of each carrier frequency of described Target cell is carried out calculation process, obtains the calculation process result; With the comprehensive channel quality Q of described calculation process result as described Target cell _Target

13., it is characterized in that described first assessment unit comprises as claim 9 or 10 described terminals:

First computation subunit is used to utilize the measured value of channel quality of each carrier frequency of described Serving cell to calculate the signal interference ratio of each carrier frequency of described Serving cell; Calculate the channel quality indication of each carrier frequency of described Serving cell according to the signal interference ratio of each carrier frequency of described Serving cell;

The 3rd calculation process subelement is used for calculation process is carried out in the channel quality indication of each carrier frequency of described Serving cell, obtains the calculation process result; With the comprehensive channel quality Q of described operation result as described Serving cell _Source

Described second assessment unit comprises:

Second computation subunit is used to utilize the measured value of channel quality of each carrier frequency of described Target cell to calculate the signal interference ratio of each carrier frequency of described Target cell; Calculate the channel quality indication of each carrier frequency of described Target cell according to the signal interference ratio of each carrier frequency of described Target cell;

The 4th calculation process subelement is used for calculation process is carried out in the channel quality indication of each carrier frequency of described Target cell, obtains the calculation process result; With the comprehensive channel quality Q of described calculation process result as described Target cell _Target

14., it is characterized in that described first assessment unit comprises as claim 9 or 10 described terminals:

The 3rd computation subunit is used to utilize the measured value of channel quality of each carrier frequency of described Serving cell to calculate the signal interference ratio of each carrier frequency of described Serving cell; Calculate the channel quality indication of each carrier frequency of described Serving cell according to the signal interference ratio of each carrier frequency of described Serving cell;

First obtains subelement, is used for obtaining the transmission block size of each carrier frequency of described Serving cell according to the corresponding relation of channel quality indication with the transmission block size;

The 5th calculation process subelement is used for the transmission block size of each carrier frequency of described Serving cell is carried out calculation process, obtains the calculation process result; With the comprehensive channel quality Q of described calculation process result as described Serving cell _Source

Described second assessment unit comprises:

The 4th computation subunit is used to utilize the measured value of the channel quality of described each carrier frequency to calculate the signal interference ratio of each carrier frequency of described Target cell; Calculate the channel quality indication of each carrier frequency of described Target cell according to the signal interference ratio of each carrier frequency of described Target cell;

Second obtains subelement, according to the corresponding relation of channel quality indication with the transmission block size, obtains the transmission block size of each carrier frequency of described Target cell;

The 6th calculation process subelement is used for the transmission block size of each carrier frequency of described Target cell is carried out calculation process, obtains the calculation process result; With the comprehensive channel quality Q of described calculation process result as described Target cell _Target

15., it is characterized in that described first judging unit comprises as claim 9 or 10 described terminals:

First judgment sub-unit is used to judge described Q _TargetWhether be better than described Q _Source

Or comprise that second judgment sub-unit is used to judge described Q _TargetWhether be better than described Q _SourceWith switch sluggish and;

Or comprise that the 3rd judgment sub-unit is used to judge described Q _TargetThat measure skew with Target cell and whether be better than described Q _SourceWith Serving cell measure skew and;

Or comprise that the 4th judgment sub-unit is used to judge described Q _TargetThat measure skew with Target cell and whether be better than described Q _SourceMeasure skew with Serving cell, switch sluggish and.

16. a network equipment is characterized in that, comprising:

Receiving element is used for the channel quality of each carrier frequency of the Serving cell that receiving terminal reports and the channel quality of each carrier frequency of Target cell;

The 3rd assessment unit is used for the comprehensive channel quality Q according to the described Serving cell of channel quality assessment of each carrier frequency of described Serving cell _Source

The 4th assessment unit is used for the comprehensive channel quality Q according to the described Target cell of channel quality assessment of each carrier frequency of described Target cell _Target

The 3rd judging unit is used to judge described Q _SourceAnd Q _TargetBetween whether satisfy the condition of setting;

Switch unit is used in the judged result of described the 3rd judging unit for being then described terminal to be switched to described Target cell from described Serving cell.

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