CN103379602A - Terminal automatic gain control method and terminal for down link multi-slot business - Google Patents

Abstract

The invention relates to the wireless communication field and discloses a terminal automatic gain control (AGC) method and terminal for down link multi-slot business. In the invention, according to each down time slot of a current subframe, the terminal determines whether the down time slot exists a down signal corresponding with the terminal according to a transport format combination indicator (TFCI) carried by the subframe; if the down time slot does not exist the down signal, the terminal obtains AGC gain value AGC next of a next subframe corresponding with the down time slot according to a set AGC gain value backup value AGC backup; if the down time slot exists the down signal, the terminal obtains the AGC next according to a current AGC gain value and AGC adjustment amount of the down time slot. The terminal automatic gain control method and terminal for down link multi-slot business can handle receiving backup saturation caused by non-first time slot discontinuous transmission under down multi-slot configuration and ensure correct receiving of down signals by the terminal.

Description

Terminal auto gain control method and terminal under the down link multislot services

Technical field

The present invention relates to wireless communication field, particularly terminal auto gain control method and the terminal under the down link multislot services in a kind of radio communication.

Background technology

In the radio communication, because the mobility of terminal and the complexity of wireless channel, the signal strength signal intensity that terminal is received constantly changes.This just requires terminal to adjust in real time the gain of receiving unit, is a constant value so that be input to the reception IQ signal of baseband processor, makes things convenient for the processing of baseband processor.In traditional TD-SCDMA automatic gaining controling algorithm, the automatic gain of each descending time slot control (Automatic Gain Control is called for short " AGC ") is carried out respectively, as shown in Figure 1:

At first, set the desired value (RSSI of descending received signal strength _Target);

Secondly, for each descending time slot, the automatic gain control module of terminal is calculated received signal strength (Receiving Signal Strength Indicator is called for short " RSSI "); Wherein the computational methods of RSSI are those skilled in that art's known technology, do not do specific descriptions herein;

Then, will calculate received signal strength and default desired value compares, determine the adjustment amount (AGC of AGC gain according to comparative result _Step); Wherein adjustment amount can be fixed step size, can be variable step size also, gives an example with fixed step size, and adjustment amount is really fixed then and is:

A) fixed step size of note gain adjustment is FixedStep, wherein FixedStep＞0;

B) if RSSI is less than or equal to RSSI _Target, adjustment amount AGC then _StepBe fixed step size, i.e. AGC _Step=FixedStep;

C) if RSSI greater than RSSI _Target, adjustment amount AGC then _StepBe the negative value of fixed step size, i.e. AGCstep=-FixedStep.

At last, according to the AGC yield value (AGC of current this descending time slot of subframe _Current) and the AGC yield value adjustment amount that obtains of previous step, generate the gain of received signal (AGC of the same descending time slot of corresponding next subframe _Next), the signal of controlling the corresponding descending time slot of next subframe receives; AGC wherein _Next=AGC _Current+ AGC _Step

May there be a plurality of descending time slots in Packet Service for the business, particularly two-forty of carrying by down physical channel (DPCH) in the TD-SCDMA system in same subframe.When instantaneous service rate was lower than the Radio Resource (RU) of distribution, the method for through-rate coupling can determine to be actually used in the Radio Resource number of physical channels of transmission, will adopt discontinuous emission (DTX) for untapped Radio Resource.Wherein the method for rate-matched is referring to 3GPP standard 25.222, and the method for discontinuous emission is those skilled in that art's known technology referring to 3GPP standard 25.224, does not do specific descriptions herein.For the business of having distributed a plurality of descending time slots, the possibility of result of rate-matched has following three kinds of situations:

A) in the descending time slot of all distribution, all there is Radio Resource to be used; Be in all descending time slots of this user terminal distribution, all have the downstream signal emission for this user terminal.

B) in the descending time slot of all distribution, there is not Radio Resource to be used; Only in this user terminal descending first business time-slot launch special burst (Special Burst) according to the method for DTX this moment, and other descending time slots are not launched for the downstream signal of this user terminal.

C) in the descending time slot of all distribution, only have the Radio Resource of part time slot to be used, the Radio Resource that remains other time slots is not used; The descending time slot that does not have Radio Resource to be used will not have this user's downstream signal emission according to the method for DTX this moment.

Can find out that for terminal, may there be the situation of not launching this subscriber signal in descending non-first time slot.

When not existing for the emission of this user's downstream signal in the descending time slot that user terminal distributes, according to traditional auto gain control method, it will be very little not having the RSSI result of calculation of signal transmission time slot, can cause like this AGC gain of corresponding time slot to be adjusted increase.When the momentary rate of business is lower than nominal rate continuously, do not exist the non-first time slot A GC yield value of signal emission by lifting step by step, to become a larger gain; In case this moment, momentary rate became large, when the descending time slot recovery downstream signal of originally not launching is launched, because its corresponding yield value is bigger than normal, may cause to receive the saturated of signal, the proper solution that affects downstream signal is in harmonious proportion to be deciphered, and causes the deterioration of receptivity.

Summary of the invention

The object of the present invention is to provide terminal auto gain control method and terminal under a kind of down link multislot services, so that terminal is under multislot services, can access the AGC yield value that is suitable for receiving business time-slot, thereby the AGC gain control in the time of can correctly processing descending non-first business time-slot no signal emission, solve the discontinuous emission of non-first time slot that under descending multi-slot configuration, produces owing to the momentary rate fluctuation under the existing method and occur receiving saturated problem, guarantee that terminal is to the correct reception of downstream signal.

For solving the problems of the technologies described above, embodiments of the present invention provide the terminal auto gain control method under a kind of down link multislot services, comprise following steps:

For each descending time slot of current subframe, terminal is judged the downstream signal that whether has corresponding this terminal on this descending time slot according to the transformat combination indication TFCI that carries in the subframe;

If there is not described downstream signal on this descending time slot, then terminal is according to the backup value AGC of the automatic gain control AGC gain of setting _Backup, obtain in the next subframe AGC yield value AGC of corresponding this descending time slot _Next

If there is described downstream signal on this descending time slot, then terminal obtains described AGC according to current AGC yield value and the AGC adjustment amount of this descending time slot _Next

Embodiments of the present invention also provide a kind of terminal, comprise:

The resource occupation judge module is used for each descending time slot for current subframe, and the transformat combination indication TFCI according to carrying in the subframe judges the downstream signal that whether has corresponding this terminal on this descending time slot;

The first yield value acquisition module is used for judging when not having described downstream signal on this descending time slot at described resource occupation judge module, according to the backup value AGC of the automatic gain control AGC gain of setting _Backup, obtain in the next subframe AGC yield value AGC of corresponding this descending time slot _Next

The second yield value acquisition module is used for when described resource occupation judge module judges that there is described downstream signal in this descending time slot, and current AGC yield value and AGC adjustment amount according to this descending time slot obtain described AGC _Next

Owing to carried transformat combination indication (TFCI) on the DPCH, according to TFCI, can calculate Radio Resource actual under this TFCI and take situation, also just can judge on each descending time slot, whether have the downstream signal of corresponding this user terminal; And whether have the downstream signal of corresponding this user terminal according to this descending time slot, calculate respectively the AGC yield value AGC of the same descending time slot of next subframe _NextBecause when not having described downstream signal on this descending time slot, terminal will be according to the backup value AGC of the AGC gain of setting _Backup, obtain the AGC yield value AGC of same descending time slot in the next subframe _Next, but not according to current AGC yield value and AGC adjustment amount, obtain this AGC _NextTherefore, embodiment of the present invention can be tackled the reception saturated phenomenon that the lower discontinuous emission of non-first time slot that produces owing to the momentary rate fluctuation of descending multi-slot configuration causes in terms of existing technologies, guarantees that terminal is to the correct reception of downstream signal.

Preferably, at the AGC according to setting _Backup, obtain described AGC _NextThe time, according to the variable quantity of received power on the beacon channel, to described AGC _BackupCarry out correction-compensation, and with the value behind the correction-compensation as described AGC _NextBecause when the discontinuous emission of descending non-first business time-slot, radio propagation channel still is in the middle of the variation, this moment can be according to the situation of change of received power on the beacon channel in the TD-SCDMA system, it is the situation of change of path loss, the AGC yield value is compensated, further adapt to the variation of wireless channel.

Preferably, the AGC of described setting _BackupCan be the AGC of this descending time slot of correspondence of in the end subframe in the upper once minimum transfer time interval, calculating _NextThe AGC of this descending time slot of correspondence that calculates in the end subframe with the last minimum transfer time interval _Next, as the AGC that sets _Backup, further guaranteed according to this AGC _BackupThis AGC that obtains _NextAccuracy.

Preferably, the AGC of described setting _BackupAlso can be a predefined empirical value, perhaps be the recently correct employed AGC yield value of signal that receives of this descending time slot.So that embodiments of the present invention can realize according to the actual requirements flexible and changeablely.

Preferably, after not having described downstream signal on this descending time slot of judgement, according to whether there being the correct transmission block of decoding cyclic redundancy check (CRC) in the current minimum transfer time interval TTI, judge whether described TFCI is credible; Wherein, if there is the correct transmission block of decoding CRC, judge that then described TFCI is credible; If there is no decipher the correct transmission block of CRC, judge that then described TFCI is insincere.If judge that described TFCI is credible, then carry out again described AGC according to setting _Backup, obtain described AGC _NextStep; If judge that described TFCI is insincere, then forbid carrying out described AGC according to setting _Backup, obtain described AGC _NextStep, terminal obtains described AGC according to current AGC yield value and the AGC adjustment amount of this descending time slot _NextBecause in the transmission course of wireless signal, the propagation of TFCI symbol may be subject to various interference and the result of the destroyed TFCI of causing decoding is insincere; Can utilize the result of data division CRC check to do further examination this moment, if the CRC check result of data division exists at least one transmission block CRC correct, the decode results of TFCI is reliable so, and the Radio Resource that calculates according to TFCI takies situation and also can accept and believe.Detect by the reliability to the TFCI decode results, further guaranteed the correct reception of terminal to downstream signal.

Description of drawings

Fig. 1 is TD-SCDMA auto gain control method flow chart in the prior art;

Fig. 2 is the flow chart of the auto gain control method of first embodiment of the invention;

Fig. 3 is the flow chart of auto gain control method second embodiment of the invention;

Fig. 4 is the structure chart according to the terminal of the 4th execution mode of the present invention.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing the embodiments of the present invention are explained in detail.Yet, persons of ordinary skill in the art may appreciate that in each execution mode of the present invention, in order to make the reader understand the application better many ins and outs have been proposed.But, even without these ins and outs with based on many variations and the modification of following each execution mode, also can realize each claim of the application technical scheme required for protection.

The first execution mode of the present invention relates to the terminal auto gain control method under a kind of down link multislot services, in the present embodiment, each descending time slot for current subframe, terminal is according to transformat combination indication (the Transport Format Combination Indicator that carries in the subframe, be called for short " TFCI "), judge the downstream signal that whether has corresponding this terminal on this descending time slot; If there is not the downstream signal of corresponding this terminal on this descending time slot, then terminal is according to the backup value AGC of the automatic gain control AGC gain of setting _Backup, obtain in next subframe the AGC yield value AGC of corresponding this descending time slot _NextIf there is the downstream signal of corresponding this terminal on this descending time slot, then terminal obtains AGC according to current AGC yield value and the AGC adjustment amount of this descending time slot _NextIdiographic flow comprises the steps: as shown in Figure 2

Step S201, the desired value RSSI of setting descending time slot received signal strength _Target

Step S202 calculates the received signal strength RSSI of current this business time-slot of subframe.

Step S203, the received signal strength that relatively calculates and default desired value.

Step S204 determines the adjustment amount AGC that AGC gains according to comparative result _StepWherein adjustment amount can be fixed step size, also can be variable step size.Below illustrate that with fixed step size distance adjustment amount fixes then really:

Suppose that the fixed step size that gain is adjusted is FixedStep, wherein FixedStep＞0; If the received signal strength RSSI that calculates is less than or equal to default desired value RSSI _Target, adjustment amount AGC then _StepEqual fixed step size FixedStep; If the received signal strength RSSI that calculates is greater than default desired value RSSI _Target, adjustment amount AGC then _StepEqual the negative value of fixed step size.

Step S205 judges whether current subframe is the DPCH Transmission Time Interval end subframe of (Transmission Timing Interval is called for short " TTI "); If not, then enter step S206; If so, then enter step S207.

Step S206 is with the AGC yield value AGC of current this descending time slot of subframe _CurrentWith adjustment amount AGC _StepAddition obtains the AGC yield value AGC of same descending time slot in next subframe _Next, i.e. AGC _Next=AGC _Current+ AGC _StepAnd with this AGC _NextThe signal of controlling same descending time slot in the next subframe receives.

In step S207 and step S208, the transformat combination indication TFCI according to carrying in the subframe judges the downstream signal that whether has corresponding this terminal on this descending time slot.

Specifically, in step S207, according to the TFCI in the current minimum TTI, the Radio Resource of calculating book descending time slot reality takies situation.

Then in step S208, take situation according to the Radio Resource of this descending time slot reality that calculates, judge whether this descending time slot exists the downstream signal of corresponding this user terminal, if there is no, execution in step S209 then; If exist, then execution in step S210.

Step S209 is according to the backup value AGC of the AGC gain of setting _Backup, calculate the AGC yield value AGC of same descending time slot in next subframe _NextIn the present embodiment, the AGC of setting _BackupAGC for this descending time slot of correspondence of in the end subframe of upper once minimum TTI, calculating _Next, therefore in this step, calculating AGC _NextAfter, also need upgrade this AGC _Backup, the AGC yield value AGC of the same descending time slot of next subframe that is about to calculate _NextBackup value AGC as the AGC gain _BackupStore.

Specifically, because in the TD-SCDMA system, in order to be convenient for measuring the code channel of TS0 in each subframe of center of housing estate frequency (time slot 0)

With

Upper meeting is launched according to reference power omnidirectional, the code channel of TS0

With Also just be referred to as beacon channel.The characteristic of beacon channel: theaomni-directional transmission, each subframe exists, power invariability.Consider that radio propagation channel still is in the middle of the variation when the discontinuous emission of descending non-first business time-slot.Therefore, in the present embodiment, can be in conjunction with the situation of change of received power on the beacon channel in the TD-SCDMA system, namely the variable quantity of received power (also can be described as the path loss variable quantity) on the beacon channel obtains AGC _Next, with the variation of further adaptation wireless channel.That is to say, suppose that the beacon channel received signal strength of upper minimum TTI end subframe moment point is P-CCPCH RSCP _{Last_minTTI}, the beacon channel received signal strength that current minimum TTI finishes the subframe moment point is P-CCPCH RSCP _{Cur_minTTI}, both subtracted each other obtain path loss variable quantity (Pathloss _Delta), i.e. Pathloss _Delta=P-CCPCH RSCP _{Last_minTTI}-P-CCPCHRSCP _{Cur_minTTI}Then, according to the path loss variable quantity that calculates to AGC _BackupCarry out obtaining AGC behind the correction-compensation _Next, that is to say, with this Pathloss _DeltaWith the AGC that sets _Backup(namely go up a minimum TTI and finish subframe moment point backup AGC _Backup) addition obtains the AGC of the same descending time slot of corresponding next subframe _Next, the signal of controlling the corresponding descending time slot of next subframe receives; Be AGC _Next=AGC _Backup+ Pathloss _DeltaCalculating AGC _NextAfter, upgrade the backup value AGC that AGC gains _Backup, i.e. AGC _Backup=AGC _Next

After execution in step S208, there is the downstream signal of corresponding this user terminal if judge this descending time slot, execution in step S210 then is with current this descending time slot of subframe AGC yield value AGC _CurrentWith adjustment amount AGC _StepAddition obtains the AGC yield value AGC of same descending time slot in next subframe _NextBe AGC _Next=AGC _Current+ AGC _StepAnd the backup value AGC of renewal AGC gain _BackupAGC yield value AGC for the same descending time slot of next subframe _Next, i.e. AGC _Backup=AGC _Next

The implementation of research prior art can be found out if can know the actual transmission situation of descending time slot, can avoid so because the AGC gain mistuning that causes on the low side of rssi measurement value.Owing to carried transformat combination indication (TFCI) on the DPCH, according to TFCI, can calculate Radio Resource actual under this TFCI and take situation, also just can judge on each descending time slot, whether have the downstream signal of corresponding this user terminal.Calculating Radio Resource according to TFCI, to take the method for the method of situation and rate-matched identical, is those skilled in the art's known technology, do not do specific descriptions herein.The first execution mode of the present invention is exactly to judge according to TFCI whether this descending time slot exists the downstream signal of corresponding this user terminal, and whether have the downstream signal of corresponding this user terminal according to this descending time slot, calculate respectively the AGC yield value AGC of the same descending time slot of next subframe _Next, can tackle the reception saturated phenomenon that the lower discontinuous emission of non-first time slot that produces owing to the momentary rate fluctuation of descending multi-slot configuration causes, guarantee that terminal is to the correct reception of downstream signal.

It is worth mentioning that, in the present embodiment, the AGC of setting _BackupAGC for this descending time slot of correspondence of in the end subframe of upper once minimum TTI, calculating _Next, but in actual applications, the AGC of setting _BackupAlso can be a predefined empirical value, perhaps be the recently correct employed AGC yield value of signal that receives of this descending time slot.So that embodiments of the present invention can realize according to the actual requirements flexible and changeablely.

The second execution mode of the present invention relates to the terminal auto gain control method under a kind of down link multislot services.The second execution mode improves on the first execution mode basis, and its improvements are: in second embodiment of the invention, after not having described downstream signal on this descending time slot of judgement, carry out described AGC according to setting _Backup, obtain described AGC _NextStep before, also comprise following steps:

According to whether there being the correct transmission block of decoding cyclic redundancy check (CRC) in the current TTI, judge whether TFCI is credible; Wherein, if there is the correct transmission block of decoding CRC, judge that then TFCI is credible; If there is no decipher the correct transmission block of CRC, judge that then TFCI is insincere.

If judge that TFCI is credible, the AGC that sets of executive basis more then _Backup, obtain described AGC _NextStep; If judge that TFCI is insincere, then forbid the AGC that executive basis is set _Backup, obtain described AGC _NextStep, terminal obtains described AGC according to current AGC yield value and the AGC adjustment amount of this descending time slot _NextIdiographic flow as shown in Figure 3.

Because in the transmission course of wireless signal, the propagation of TFCI symbol may be subject to various interference and the result of the destroyed TFCI of causing decoding is insincere; Can utilize the result of data division CRC check to do further examination this moment, if the CRC check result of data division exists at least one transmission block CRC correct, the decode results of TFCI is reliable so, and the Radio Resource that calculates according to TFCI takies situation and also can accept and believe.Detect by the reliability to the TFCI decode results, further guaranteed the correct reception of terminal to downstream signal.

The 3rd execution mode of the present invention relates to the terminal auto gain control method under a kind of down link multislot services.The 3rd execution mode and the first execution mode are roughly the same, and main distinction part is: in the first embodiment, and according to the backup value AGC of the AGC gain of setting _Backup, in conjunction with the variable quantity (also can be described as the path loss variable quantity) of received power on the beacon channel, calculate the AGC yield value AGC of same descending time slot in next subframe _NextAnd in third embodiment of the invention, after judging that there is not the downstream signal of corresponding this user terminal in this descending time slot, directly use the backup value AGC of the AGC gain of setting _BackupAGC yield value AGC as the same descending time slot of next subframe _Next

The step of top the whole bag of tricks is divided, and just in order to be described clearly, can to merge into a step during realization or some step is split, and is decomposed into a plurality of steps, as long as comprise identical logical relation, all in the protection range of this patent; To adding inessential modification in the algorithm or in the flow process or introduce inessential design, but the core design that does not change its algorithm and flow process is all in the protection range of this patent.

Four embodiment of the invention relates to a kind of terminal, as shown in Figure 4, comprises:

The resource occupation judge module is used for each descending time slot for current subframe, and the transformat combination indication TFCI according to carrying in the subframe judges the downstream signal that whether has corresponding this terminal on this descending time slot.

The first yield value acquisition module is used for judging when not having described downstream signal on this descending time slot at described resource occupation judge module, according to the backup value AGC of the automatic gain control AGC gain of setting _Backup, obtain in the next subframe AGC yield value AGC of corresponding this descending time slot _Next

The second yield value acquisition module is used for when described resource occupation judge module judges that there is described downstream signal in this descending time slot, and current AGC yield value and AGC adjustment amount according to this descending time slot obtain described AGC _Next

In the present embodiment, the first yield value acquisition module comprises following submodule:

Calculating sub module is for the variable quantity that calculates received power on the beacon channel;

The correction-compensation submodule is used for the described variable quantity according to described calculating sub module calculating, to described AGC _BackupCarry out correction-compensation, and with the value behind the correction-compensation as described AGC _Next

In the present embodiment, current subframe is the end subframe in the minimum transfer time interval; The AGC that sets _BackupAGC for this descending time slot of correspondence of in the end subframe in the upper once minimum transfer time interval, calculating _Next

In addition, in actual applications, the AGC of setting _BackupAlso can be a predefined empirical value, perhaps, this descending time slot is the correct employed AGC yield value of signal that receives recently.

Be not difficult to find that present embodiment is the system embodiment corresponding with the first execution mode, present embodiment can with the enforcement of working in coordination of the first execution mode.The correlation technique details of mentioning in the first execution mode is still effective in the present embodiment, in order to reduce repetition, repeats no more here.Correspondingly, the correlation technique details of mentioning in the present embodiment also can be applicable in the first execution mode.

It is worth mentioning that each involved in present embodiment module is logic module, in actual applications, a logical block can be a physical location, also can be the part of a physical location, can also realize with the combination of a plurality of physical locations.In addition, for outstanding innovation part of the present invention, will not introduce not too close unit with solving technical problem relation proposed by the invention in the present embodiment, but this does not show the unit that does not have other in the present embodiment.

Fifth embodiment of the invention relates to a kind of terminal.The 5th execution mode improves on the 4th execution mode basis, and its improvements are: in the 5th execution mode, terminal is inclusion test module and control module also.

Specifically, when detection module is judged the downstream signal that does not have corresponding this user terminal on this descending time slot at the resource occupation judge module, according to whether there being the correct transmission block of decoding cyclic redundancy check (CRC) in the current minimum transfer time interval TTI, judge whether TFCI is credible; Wherein, when having the correct transmission block of decoding CRC, detection module judges that TFCI is credible; When not having the correct transmission block of decoding CRC, detection module judges that TFCI is insincere.

When control module judges that at detection module TFCI is insincere, forbid the triggering of described the first yield value acquisition module, and trigger described the second yield value acquisition module.

In the present embodiment, detect by the reliability to the TFCI decode results, further guaranteed the correct reception of terminal to downstream signal.

Because the second execution mode is mutually corresponding with present embodiment, thus present embodiment can with the enforcement of working in coordination of the second execution mode.The correlation technique details of mentioning in the second execution mode is still effective in the present embodiment, and the technique effect that can reach in the second execution mode can be realized in the present embodiment too, in order to reduce repetition, repeats no more here.Correspondingly, the correlation technique details of mentioning in the present embodiment also can be applicable in the second execution mode.

Sixth embodiment of the invention relates to a kind of terminal.The 6th execution mode and the 4th execution mode are roughly the same, and its difference part is: in the 4th execution mode, the first yield value acquisition module comprises calculating sub module and correction-compensation submodule, utilizes this correction-compensation submodule to AGC _BackupCarry out correction-compensation and obtain AGC _NextAnd in the 6th execution mode, the first yield value acquisition module directly will be set the AGC of the backup value of AGC gain _Backup, as the AGC yield value AGC of corresponding this descending time slot in the next subframe _Next

Because the 3rd execution mode is mutually corresponding with present embodiment, thus present embodiment can with the enforcement of working in coordination of the 3rd execution mode.The correlation technique details of mentioning in the 3rd execution mode is still effective in the present embodiment, and the technique effect that can reach in the 3rd execution mode can be realized in the present embodiment too, in order to reduce repetition, repeats no more here.Correspondingly, the correlation technique details of mentioning in the present embodiment also can be applicable in the 3rd execution mode.

Persons of ordinary skill in the art may appreciate that the respective embodiments described above are to realize specific embodiments of the invention, and in actual applications, can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.

Claims (14)

1. the terminal auto gain control method under the down link multislot services is characterized in that, comprises following steps:

For each descending time slot of current subframe, terminal is judged the downstream signal that whether has corresponding this terminal on this descending time slot according to the transformat combination indication TFCI that carries in the subframe;

If there is not described downstream signal on this descending time slot, then terminal is according to the backup value AGC of the automatic gain control AGC gain of setting _Backup, obtain in the next subframe AGC yield value AGC of corresponding this descending time slot _Next

If there is described downstream signal on this descending time slot, then terminal obtains described AGC according to current AGC yield value and the AGC adjustment amount of this descending time slot _Next

2. the terminal auto gain control method under the down link multislot services according to claim 1 is characterized in that, described AGC according to setting _Backup, obtain described AGC _NextStep in, comprise following substep:

According to the variable quantity of received power on the beacon channel, to described AGC _BackupCarry out correction-compensation, and with the value behind the correction-compensation as described AGC _Next

3. the terminal auto gain control method under the down link multislot services according to claim 1 is characterized in that, described AGC according to setting _Backup, obtain described AGC _NextStep in,

Direct AGC with described setting _Backup, as described AGC _Next

4. the terminal auto gain control method under the down link multislot services according to claim 1 is characterized in that, after not having described downstream signal on this descending time slot of judgement, carries out described AGC according to setting _Backup, obtain described AGC _NextStep before, also comprise following steps:

According to whether there being the correct transmission block of decoding cyclic redundancy check (CRC) in the current minimum transfer time interval TTI, judge whether described TFCI is credible; Wherein, if there is the correct transmission block of decoding CRC, judge that then described TFCI is credible; If there is no decipher the correct transmission block of CRC, judge that then described TFCI is insincere;

If judge that described TFCI is credible, then carry out again described AGC according to setting _Backup, obtain described AGC _NextStep; If judge that described TFCI is insincere, then forbid carrying out described AGC according to setting _Backup, obtain described AGC _NextStep, terminal obtains described AGC according to current AGC yield value and the AGC adjustment amount of this descending time slot _Next

5. the terminal auto gain control method under the down link multislot services according to claim 1 is characterized in that,

Described current subframe is the end subframe in the minimum transfer time interval.

6. the terminal auto gain control method under each described down link multislot services in 5 according to claim 1 is characterized in that,

The AGC of described setting _BackupAGC for this descending time slot of correspondence of in the end subframe in the upper once minimum transfer time interval, calculating _Next

7. the terminal auto gain control method under each described down link multislot services in 5 according to claim 1 is characterized in that,

The AGC of described setting _BackupBe a predefined empirical value, perhaps,

The AGC of described setting _BackupFor this descending time slot correctly receives the employed AGC yield value of signal recently.

8. a terminal is characterized in that, comprises:

The resource occupation judge module is used for each descending time slot for current subframe, and the transformat combination indication TFCI according to carrying in the subframe judges the downstream signal that whether has corresponding this terminal on this descending time slot;

The first yield value acquisition module is used for judging when not having described downstream signal on this descending time slot at described resource occupation judge module, according to the backup value AGC of the automatic gain control AGC gain of setting _Backup, obtain in the next subframe AGC yield value AGC of corresponding this descending time slot _Next

The second yield value acquisition module is used for when described resource occupation judge module judges that there is described downstream signal in this descending time slot, and current AGC yield value and AGC adjustment amount according to this descending time slot obtain described AGC _Next

9. terminal according to claim 8 is characterized in that, described the first yield value acquisition module comprises following submodule:

Calculating sub module is for the variable quantity that calculates received power on the beacon channel;

The correction-compensation submodule is used for the described variable quantity according to described calculating sub module calculating, to described AGC _BackupCarry out correction-compensation, and with the value behind the correction-compensation as described AGC _Next

10. terminal according to claim 8 is characterized in that,

Described the first yield value acquisition module is directly with the AGC of described setting _Backup, as described AGC _Next

11. terminal according to claim 8 is characterized in that, described terminal also comprises:

Detection module, be used for judging when not having described downstream signal on this descending time slot at described resource occupation judge module, according to whether there being the correct transmission block of decoding cyclic redundancy check (CRC) in the current minimum transfer time interval TTI, judge whether described TFCI is credible; Wherein, described detection module judges that described TFCI is credible when having the correct transmission block of decoding CRC; Described detection module judges that described TFCI is insincere when not having the correct transmission block of decoding CRC;

Control module is used for forbidding the triggering of described the first yield value acquisition module, and triggering described the second yield value acquisition module when described detection module judges that described TFCI is insincere.

12. terminal according to claim 8 is characterized in that, described current subframe is the end subframe in the minimum transfer time interval.

13. each described terminal in 12 is characterized in that according to claim 8,

The AGC of described setting _BackupAGC for this descending time slot of correspondence of in the end subframe in the upper once minimum transfer time interval, calculating _Next

14. each described terminal in 12 is characterized in that according to claim 8,

The AGC of described setting _BackupBe a predefined empirical value, perhaps,

The AGC of described setting _BackupFor this descending time slot correctly receives the employed AGC yield value of signal recently.

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