CN101350639A - Power control method for non-continuity transmission - Google Patents
Power control method for non-continuity transmission Download PDFInfo
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Abstract
The present invention discloses a power control method of discontinuous transmission, and comprises the following steps: the user equipment UE or base station NodeB is used for acquiring and storing the target error rate in advance; in the stage of discontinuous transmission DTX, the NodeB or UE is used for periodically transmitting special burst to the opposite end; the data domain of the special burst is used for carrying the preset data; the UE or NodeB is used for comparing the received data in the data domain of the special burst and the preset data, so as to determine the actual error rate of the special burst; the original target SIR is updated according to the actual error rate and the target error rate; the power of the updated target SIR and the actually measured SIR is regulated. The method can be used for completing the normal power control of the DTX process, and determining the appropriate transmission power.
Description
Technical field
The present invention relates to power control techniques, the Poewr control method in particularly a kind of noncontinuity transmission.
Background technology
In the TD-SCDMA system, the data that can utilize the other side to send in the communication process between subscriber equipment (UE) and base station (NodeB) are carried out the control of through-put power, make normally received signal of the other side to guarantee certain quality of service requirement, do not waste through-put power simultaneously again.Common Poewr control method comprises open loop power control and closed-loop power control.Wherein, closed-loop power control comprises external circule power control and inner-loop power control.
The purpose of related external circule power control is to be updated periodically target signal interference ratio (SIR) in the closed-loop power control, concrete update mode is generally: calculate actual error rate according to current channel quality, wherein this error rate can be bit error rate (BER), Block Error Rate (BLER) etc., obtain current goal signal interference ratio (SIR) according to this error rate again, to upgrade original target SIR.The purpose of inner-loop power control is according to target SIR after the external circule power control renewal and the actual SIR that measures, determine power adjustment mode, concrete adjustment mode is: if the actual SIR that base station (NodeB) or subscriber equipment (UE) measure is less than or equal to the target SIR after external circule power control upgrades, then sends through-put power control (TPC) order by the opposite end and progressively improve its through-put power; If the current goal SIR that the actual SIR that base station or user measure obtains greater than external circule power control then sends the TPC order by the opposite end and progressively reduces its through-put power.Wherein, the change step-length of through-put power is handed down to NodeB and UE by RNC.As seen by above-mentioned, the accuracy of target SIR is a key factor of decision closed-loop power control performance.
In the communication process of NodeB and UE, there is noncontinuity transmission (DTX) process, in this process, the upper strata does not have actual information data transmission, for keeping connecting and saving power, both sides can periodically send some short packets, and these short packets are called special burst (SpecialBurst).In the DTX process, the upper strata does not have actual information data, and sending to what carry in the special burst of opposite end is random data, so the opposite end can't obtain actual error rate according to the data that receive, and just can't upgrade target SIR yet.As seen, though channel circumstance changes at any time in the DTX process, target SIR but can't real-time update, therefore adopts closed-loop power control improper, can't determine suitable through-put power.
Summary of the invention
In view of this, the invention provides the Poewr control method among a kind of DTX, can carry out normally power being controlled, determine suitable through-put power the DTX process.
For achieving the above object, the present invention adopts following technical scheme:
Poewr control method in a kind of noncontinuity transmission comprises:
Target error rate is obtained and preserved to user equipment (UE) or base station node B in advance;
In the noncontinuity transmission DTX stage, NodeB or UE send special burst to the opposite end cycle, carry the data that set in advance in the data field of described special burst;
The data of data field and the described data that set in advance in the special burst that UE or NodeB relatively receive are determined this special actual error rate that happens suddenly, and upgrade original target SIR according to the target error rate of this actual error rate and preservation; Carry out the power adjustment according to target SIR after upgrading and the actual SIR that measures.
Preferably, this method further comprises: described NodeB or UE obtain the transmission cycle of described special burst in advance.
Preferably, described UE obtains the transmission cycle of special burst in advance and is: base station controller RNC is carried the transmission cycle of special burst in the uplink physical channel control messages Uplink Physical Channel ControlMessage that sends to UE;
The transmission cycle that described NodeB obtains special burst in advance is: RNC sets up the transmission cycle of carrying special burst among the request message Radio Link Setup Request Message at the Radio Link that sends to NodeB.
Preferably, described NodeB obtains target error rate and is: RNC prepares to carry target error rate among the message Radio Link Reconfiguration Prepare Message at wireless link and wireless request for building link message Radio Link Setup Request Message that sends to NodeB and/or radio link reconfiguration;
Described UE obtains target error rate: RNC sets up among message Radio Bearer Message and/or the radio bearer reconfiguration message Radio BearerReconfiguration Message at the radio bearer that sends to UE and carries target error rate.
Preferably, in Radio Link Setup Request Message, Radio LinkReconfiguration Prepare Message, Radio Bearer Message and Radio BearerReconfiguration Message, increase the target error rate field in advance newly, in this new field, write the value of target error rate.
Preferably, the actual error rate of the special burst of described basis and target error rate renewal target SIR are:
Calculate continuously N actual error rate, and the weighted average of getting this N value is as the feature error rate;
If described feature error rate then improves a step-length with original target SIR greater than deviator sum on the target error rate of preserving and the target error rate that sets in advance;
If described feature error rate is poor less than deviator under the target error rate of preserving and the target error rate that sets in advance, then determine original target SIR is reduced a step-length;
If described feature error rate is positioned between designation area, then keep original target SIR constant; Between described designation area be the difference of deviator interval between the deviator sum on target error rate and the target error rate under target error rate and the target error rate.
Preferably, the actual error rate of the special burst of described basis and target error rate renewal target SIR are:
After calculating actual error rate, if described actual error rate then improves a step-length with original target SIR greater than deviator sum on the target error rate of preserving and the target error rate that sets in advance;
If described actual error rate is poor less than deviator under the target error rate of preserving and the target error rate that sets in advance, then original target SIR is reduced a step-length;
If described actual error rate is positioned between designation area, then keep original target SIR constant; Between described designation area be the difference of deviator interval between the deviator sum on target error rate and the target error rate under target error rate and the target error rate.
Preferably, when NodeB receives special burst for the first time, with enter DTX before the stage up-to-date target SIR as the initial value of target SIR;
When UE receives special burst for the first time, with enter DTX before the stage up-to-date target SIR as the initial value of target SIR;
Preferably, when carrying out uplink power control, this method further comprises: NodeB sets in advance up maximum target SIR and up minimum target SIR; In the closed interval of described up maximum target SIR and up minimum target SIR formation, upgrade target SIR;
When carrying out descending power control, this method further comprises: UE sets in advance descending maximum target SIR and descending minimum target SIR; In the closed interval of described up maximum target SIR and up minimum target SIR formation, upgrade target SIR.
Preferably, described error rate is a bit error rate.
As seen from the above technical solution, in the DTX of the present invention stage, UE or NodeB send special burst to the opposite end cycle, and should carry the data that set in advance in the data field of special burst.After the opposite end receives special burst, data in the special bursty data territory that relatively receives and the data that set in advance, promptly can obtain the actual error rate of current channel, upgrade original target SIR according to this actual error rate then, as the external circule power control result.Target SIR after upgrading according to the actual SIR that measures and external circule power control is again determined the TPC bit that returns to carry out the adjustment of through-put power.By above-mentioned processing procedure as can be seen, by in special burst, carrying the data that set in advance, thereby obtain actual error rate, and then upgrade target SIR, the DTX stage is carried out power control to adopt closed-loop power control.
Description of drawings
Fig. 1 is the Poewr control method overview flow chart among the DTX provided by the invention.
Fig. 2 is the ascending power control method among the DTX in the embodiment of the invention one.
Fig. 3 is the method for controlling downlink power among the DTX in the embodiment of the invention two.
Embodiment
For making purpose of the present invention, technological means and advantage clearer,, the present invention is described in further detail below in conjunction with accompanying drawing.
Basic thought of the present invention is: in the DTX stage, obtain the actual error rate of channel, thereby upgrade target SIR according to this value, and according to target SIR after upgrading and the actual SIR that measures, realize determining and adjusting the purpose of through-put power.
Fig. 1 is the Poewr control method overview flow chart among the DTX provided by the invention.As shown in Figure 1, this method comprises:
Wherein, when carrying out uplink power control, carry out this step by NodeB; When carrying out descending power control, carry out this step by UE.
So far, method flow provided by the invention finishes.
In 3GPP, defined the burst message that sends in the DTX stages period--special burst (Special Burst), this message is produced by NodeB or UE and sends to the other side with certain cycle, its time slot format is identical with the time slot format of high level data, and all bits in TFCI territory wherein are 0.The control character that can comprise some physical layers in this Special Burst for example is used for notifying the other side to carry out the TPC bit that power is adjusted.When sending Special Burst, through-put power equates with the through-put power of the corresponding physical channel of coded composite transport channel (CCTrCH).In the method for the invention, utilize the Special Burst that carries preset data can realize upgrading the purpose of target SIR, thereby carry out closed-loop power control in the DTX stage.Particularly, to the burst message that defines among the 3GPP in the transmission of DTX stages period--special burst (Special Burst) is revised: the data that data field carries among the SpecialBurst of 3GPP definition are at random, and the data that data field carries in Special Burst of the present invention set in advance, and NodeB and UE both sides have all preserved these default data.
UE and NodeB are in the DTX stage, send above-mentioned amended Special Burst to the opposite end, the opposite end utilizes the data computation actual error rate in this Special Burst data field that receives, utilize this value to upgrade original target SIR again, thereby can carry out power control according to the target SIR after this renewal.
On the direction of power control, power control can be divided into uplink power control and descending power control.Wherein, NodeB is controlled to be uplink power control according to the power that the Special Burst that receives carries out, and is used to control the through-put power of UE when NodeB sends message; The power that UE carries out according to the SpecialBurst that receives is controlled to be descending power control, is used to control the through-put power of NodeB when UE sends message.These two processes are just opposite, but the basic skills of carrying out power control is identical.Implement when of the present invention concrete, its execution mode is difference slightly also.
In addition, carrying out current goal SIR when upgrading, its update cycle also can be divided into two classes: one, the update cycle of target SIR identical with the transmission cycle of Special Burst, two, update cycle of target SIR is the N of Special Burst (N＞1) times.When the update cycle not simultaneously, the specific embodiment of the present invention is also inequality.
Various execution modes of the present invention are described at different directions with under the different target SIR update cycle below by specific embodiment.
Embodiment one:
In the present embodiment, the execution mode of the ascending power control method among the DTX is described in detail.In the uplink power control in DTX stage, send Spcial Burst by UE to NodeB, NodeB carries out uplink power control according to the Spcial Burst that receives, and after receiving Special Burst, calculate the actual error rate of current channel, and upgrade original target SIR according to this actual error rate, and in the uplink power control, target SIR is up target SIR.For the uplink power control of present embodiment, NodeB is a power control side, and UE is power-controlled side.
In addition, in the present embodiment, the update cycle of target SIR is identical with the transmission cycle of Special Burst.Particularly, after receiving Special Burst, calculate actual error rate at every turn, and determine that according to this actual error rate current goal SIR upgrades.Error rate in the present embodiment is specially BER.
Fig. 2 is the ascending power control method among the DTX in the embodiment of the invention one.As shown in Figure 2, this method comprises:
In this step, UE obtains define among mode and the 3GPP in transmission cycle of Special Burst identical, be specially: RNC determines the transmission cycle of Special Burst, and this cycle information is carried among the Uplink Physical Channel Control Message sends to NodeB.
In power control process, need utilize up target BER to compare and determine how to upgrade target SIR with the up target BER that measures.When carrying out uplink power control, this target BER is up target BER, is handed down to NodeB by RNC usually.This up target BER is definite according to service quality (QoS) requirement of business by RNC, and sends to NodeB, and concrete send mode can be carried at Radio Link and set up in the request message (Radio Link Setup Request Message).
Wherein, can in the up link DPCH information IE of Radio Link Setup Request Message, carry above-mentioned up target BER.The form of concrete this IE is as shown in table 1:
| ＞UL DPCH Information LCR | 0..1 | Applicable to 1.28Mcps TDD only | YES | notify | ||
| ＞＞Repetition Period | M | 9.2.3.16 | - | |||
| ＞＞Repetition Length | M | 9.2.3.15 | - | |||
| ＞＞TDD DPCH Offset | M | 9.2.3.19A | - | |||
| ＞＞UL Timeslot Information LCR | M | 9.2.3.26E | - | |||
| ＞UL SIR Target | O | UL SIR 9.2.1.67A | Mandatory for 1.28Mcps TDD.Not Applicable to 3.84Mcps TDD. | YES | reject | |
| ＞UL BER Target | O | Intege r (0..63 ) | Applicable to DTX only | |||
| ＞TDD TPC UL Step Size | O | 9.2.3.21a | Mandatory for 1.28Mcps TDD.Not Applicable to 3.84Mcps TDD. | YES | reject |
Table 1
In table 1, up target BER field is the field that increases newly.In this field, carry the value of up target BER, notice NodeB.
The interval of considering up target BER is 0≤BER≤1, and in network transmission decimal difficulty relatively, therefore, be transferred to NodeB again after in the present embodiment value of up target BER being converted to integer.Concrete conversion regime can for: when sending up target BER to NodeB, the interval of up target BER is divided into the plurality of sub interval, utilizes different integers to represent each different subinterval; RNC judges the subinterval at the up target BER place that will send, and the integer of this subinterval correspondence is sent to NodeB.Like this, just avoided the problem of transmission decimal in network.
Specifically in the present embodiment, utilize the integer of 0-63 to represent up target BER, that is to say, in the above-mentioned table 1 in the up target BER field interval of up target BER be 0-63.Each subinterval after the subinterval dividing mode of concrete up target BER and the division and the corresponding relation of 0-63 integer are as shown in table 2.
| The integer value | Represent the subinterval of target BER value |
| 0 | BER＝0 |
| 1 | -∞＜Log 10(BER)＜-4.03 |
| 2 | -4.03≤Log 10(BER)＜-3.965 |
| 3 | -3.965≤Log 10(BER)＜-3.9 |
| …… | …… |
| 61 | -0.195≤Log 10(BER)＜-0.13 |
| 62 | -0.13≤Log 10(BER)＜-0.065 |
| 63 | -0.065≤Log 10(BER)≤0 |
Table 2
RNC can be converted to integer with up target BER and send to NodeB according to the corresponding relation of table 2 record.
For professional and signaling, the value of its up target BER also may be different, perhaps along with the variation of business, up target BER also may change, at this moment can prepare to carry above-mentioned amended up link DPCH information IE in the message (Radio Link Reconfiguration Prepare Message) in radio link reconfiguration, thus the up target BER notice NodeB after will changing.
In fact, RNC can also adopt other message to carry above-mentioned information when NodeB sends up target BER, for example in a message of redetermination or the field of expanding original other message carry.
In this step, NodeB receives Radio Link Setup Request Message or Radio LinkReconfiguration Prepare Message, extract the data in the up target BER field wherein, and this data reduction is preserved for actual up target BER value.
Specifically in the present embodiment, also preserve the corresponding relation in integer shown in the table 2 and subinterval among the NodeB, according to this corresponding relation, NodeB can be converted to the data in the up target BER field corresponding subinterval.As can be seen from Table 2, each subinterval after the division is compared with the BER value in this subinterval, siding-to-siding block length is all very short, therefore, NodeB is when preserving up target BER, any one numerical value in this subinterval can be preserved as up target BER, for example with the minimum value in this subinterval as up target BER.
In the communication process of NodeB and UE, up target SIR can not be too low, otherwise NodeB can't normally discern the signal that UE sends, and therefore, for target SIR the minimum value restriction arranged; Simultaneously, up target SIR can not be too high, otherwise waste system resource, and can cause interference to other user, therefore, the maximum restriction is arranged for target SIR.Up maximum target SIR wherein and up minimum target SIR can be determined according to state of affairs by NodeB self.Therefore, preferably, comprise the scope of this step target setting SIR in the present embodiment, the setting operation of concrete up maximum, minimum target SIR can carry out in any moment before this step.
Step 205 enters DTX after the stage, and UE generates Special Burst, and the Special Burst that generates is sent to NodeB according to the transmission cycle that receives.
In this step, the Special Burst of generation is the amended Special Burst of aforementioned the present invention, wherein, carries the data that set in advance in the data field.UE and NodeB all know the data content that this sets in advance.
In this step, the mode of calculating the actual BER of current channel is identical with existing mode, just repeats no more here.
In the present embodiment, the update cycle of target SIR is identical with the transmission cycle of Special Burst, just whenever receives a Special Burst, just calculates an actual BER, and upgrades up target SIR according to this actual BER.The mode of upgrading up target SIR is specifically as follows:
In NodeB, be provided with up target BER on deviator (BERtarget2) under deviator (BERtarget1) and the up target BER, the up target BER that receives according to NodeB and the BERtarget1 and the BERtarget2 of setting can determine a target interval [up target BER-BERtarget2, up target BER+BERtarget1];
Judge the relation of current actual BER and above-mentioned target interval,, then keep original up target SIR constant if current actual BER is positioned at this target interval; If current actual BER be positioned at [∞, up target BER-BERtarget2) in, then determining will step-length of original up target SIR reduction; If current BER be positioned at (up target BER+BERtarget1 ,+∞], then determining will step-length of original up target SIR raising.The concrete step-length that improves and reduce target SIR can be in advance according to original up target SIR setting, and wherein, the step-length of raising can be identical with the step-length of reduction, also can be different, and the unit of step-length is generally dB.
When up target SIR is upgraded, be on the basis of original up target SIR, to carry out.Just entering DTX during the stage, the initial value employing of this up target SIR enters the up-to-date up target SIR of DTX before the stage and gets final product.In addition, carry out in the process that target SIR upgrades above-mentioned, preferably, the up maximum, the minimum target SIR that are provided with in can refer step 204 carry out, make the target SIR after upgrading drop on this up minimum target SIR in the closed interval that up maximum target SIR constitutes, if the up target SIR after upgrading is then cancelled this time renewal not in this closed interval, still use original target SIR.
Step 208 is determined actual SIR according to the Special Burst that receives, and determines the TPC bit according to this actual SIR and up target SIR, sends to UE.
Specifically determine that according to Special Burst the mode of actual SIR and TPC bit is identical with existing mode, just repeat no more here.
With the TPC bit send to UE mode can for: the TPC bit is carried among the Special Burst sends to UE.
So far, the ascending power control method flow process in the present embodiment finishes.
Embodiment two:
In the present embodiment, the method for controlling downlink power among the DTX is described in detail.In the descending power control in DTX stage, send Spcial Burst by NodeB to UE, UE carries out uplink power control according to the Spcial Burst that receives, and calculates the actual error rate of current channel after receiving Special Burst.
In addition, in the present embodiment, the update cycle of target SIR sends N (N＞1) times of cycle for Special Burst.Particularly, after receiving Special Burst, calculate actual error rate at every turn, after calculating N actual error rate, carry out the renewal of a target SIR according to this N actual error rate.Error rate in the present embodiment is specially BER.
Fig. 3 is the method for controlling downlink power among the DTX in the embodiment of the invention two.As shown in Figure 3, this method comprises:
In this step, NodeB obtains define among mode and the 3GPP in transmission cycle of Special Burst identical, be specially: RNC determines the transmission cycle of Special Burst, and this cycle information is carried among the Radio Link Setup Request Message sends to NodeB.According to step 201 as can be known, it is identical to send the message of maximum, minimum target SIR and target BER in the Radio Link Setup Request Message that carries the transmission cycle in this step and the step 201.In fact, can in this message, carry above-mentioned four kinds of information simultaneously.Particularly, as shown in table 1, Repetition Period wherein is used for carrying the transmission cycle of Special Burst.
In the present embodiment, RNC to UE send target BER mode can for: the radio bearer that sends to UE at RNC is set up in the message (Radio Bearer Setup Message) and is carried this target BER.Particularly, can in down link DPCH power control information (the Downlink DPCH Power Control Information) IE of Radio Bearer Setup Message, represent target BER by new field.Table 3 sends to the concrete form of DownlinkDPCH Power ControlInformation IE among the Radio Bearer Message of UE for RNC in the present embodiment.
| Information Element/Group name | Need | Multi | Type and reference | Semantics description |
| CHOICE mode | MP | |||
| ＞FDD | ||||
| ＞＞DPC Mode | MP | Enumerated (Single TPC，TPC triplet in soft) | ″Single TPC″is DPC_Mode＝0 and″TPC triplet in soft″is DPC_mode＝1 in[29]. | |
| ＞TDD | ||||
| ＞＞TPC Step Size | OP | Integer (1，2，3) | In dB | |
| ＞＞DL BER Target | OP | Intege r (0..63 ) | Applicable to DTX only |
Table 3
As shown in table 3, descending target BER wherein (DL BER Target) field is used to carry descending target BER for newly-increased field.Concrete descending target BER is identical with the interval of up target BER, and the mode of carrying in message is also identical with embodiment one, promptly utilizes integer to represent the subinterval at descending target BER place.In addition, descending target BER and up target BER are similar, also may be because professional and signaling different, and the difference of different business and changing to some extent, when descending target BER changes, can in radio bearer reconfiguration message (Radio Bearer ReconfigurationMessage), carry above-mentioned amended Downlink DPCH Power Control InformationIE, thus the descending target BER notice UE after will upgrading.Certainly, also can not adopt above-mentioned RadioBearer Setup Message and Radio Bearer Reconfiguration Message to send descending target BER, but carry this descending target BER by field or a newly-built message of expanding other existing message.
In this step, UE receives Radio Bearer Setup Message or Radio BearerReconfiguration Message, and extract data in wherein the descending target BER field, and this data reduction is preserved for actual descending target BER value.Also preserve the corresponding relation shown in the table 2 in UE, the mode of the BER that specifically converts is also identical with embodiment one, just repeats no more here.
With describe among the embodiment one similar, descending target SIR need change in the scope of appointment, its maximum, minimum value are determined according to state of affairs by UE.The setting operation of concrete descending maximum, minimum target SIR can carry out in any moment before this step.
Suppose that present upper strata does not have transfer of data, enter the DTX stage, the following operation of concrete execution in this stage:
In this step, the Special Burst of generation is the amended Special Burst of aforementioned the present invention, wherein, carries the data that set in advance in the data field.UE and NodeB have all preserved this data content that sets in advance.
In this step, the mode of calculating the actual BER of current channel is identical with existing mode, just repeats no more here.
With different among the embodiment one, in the present embodiment, the update cycle of descending target SIR is N (N＞1) times that SpecialBurst sends the cycle.In such cases, need calculate a target SIR according to N BER, therefore, whether the BER number that needs in this step to judge accumulation reaches N.
In this step, feature BER represents the overall BER trend of channel in the target SIR update cycle, particularly, determine feature BER mode can for: calculate the weighted average of N actual BER in the described update cycle, the weighted value of each BER can equate or not wait.
In this step, the mode of upgrading descending target SIR is specifically as follows:
In UE, be provided with descending target BER on deviator (BERtarget2) under deviator (BERtarget1) and the descending target BER, the descending target BER that receives according to UE and the BERtarget1 and the BERtarget2 of setting can determine a target interval [descending target BER-BERtarget2, descending target BER+BERtarget1];
The relation of judging characteristic BER and above-mentioned target interval if feature BER is positioned at this target interval, then keeps original descending target SIR constant; If current BER be positioned at [∞, descending target BER-BERtarget2) in, then determining will step-length of original descending target SIR reduction; If current BER be positioned at (descending target BER+BERtarget1 ,+∞], then determine original target SIR is improved a step-length.The step-length that specifically improves and reduce descending target SIR can be in advance according to original descending target SIR setting, and wherein, the step-length of raising can be identical with the step-length of reduction, also can be different, and the unit of step-length is generally dB.
When descending target SIR is upgraded, be on the basis of original descending target SIR, to carry out.Just entering DTX during the stage, the initial value employing of this descending target SIR enters the up-to-date up target SIR of DTX before the stage and gets final product.In addition, carry out in the process that descending target SIR upgrades above-mentioned, preferably, the descending maximum, the minimum target SIR that are provided with in can refer step 304 carry out, make the target SIR after upgrading drop on this descending minimum target SIR in the closed interval that descending maximum target SIR constitutes, if the descending target SIR after upgrading is then cancelled this time renewal not in this closed interval, still use original descending target SIR.
By the operation of above-mentioned steps 305～309 as can be seen, in the present embodiment after receiving Special Burst at every turn and calculating actual BER, might not carry out the renewal of descending target SIR, but when the actual BER that obtains reached N, property was carried out the renewal of a target SIR according to this N BER again.Thereby reduced the update times of descending target SIR, and by asking the weighted average of N BER, the level and smooth renewal process of descending target SIR makes it can reflect the desired descending target SIR of average channel situation in the time period.
Step 310 is determined actual SIR according to the Special Burst that receives, and determines the TPC bit according to this actual SIR and descending target SIR, sends to NodeB.
Specifically determine that according to Special Burst the mode of actual SIR and TPC bit is identical with existing mode, just repeat no more here.
With the TPC bit send to NodeB mode can for: the TPC bit is carried at sends to NodeB among the SpecialBurst.
So far, the method for controlling downlink power flow process in the present embodiment finishes.
The process of the foregoing description one and embodiment two can combine and carry out, and the uplink power control in DTX stage and descending power control is just carried out simultaneously.Wherein, the method for every kind of power control gets final product according to the mode of describing in the foregoing description.And, in the uplink power control process, also can adopt the target SIR update mode of describing among the embodiment two, promptly the update cycle is N times of the Special Burst transmission cycle; In like manner, in the descending power control procedure, also can adopt the target SIR update mode of describing among the embodiment one, promptly the update cycle equals the Special Burst transmission cycle.
Being preferred embodiment of the present invention only below, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1, the Poewr control method in a kind of noncontinuity transmission is characterized in that this method comprises:
Target error rate is obtained and preserved to user equipment (UE) or base station node B in advance;
In the noncontinuity transmission DTX stage, NodeB or UE send special burst to the opposite end cycle, carry the data that set in advance in the data field of described special burst;
The data of data field and the described data that set in advance in the special burst that UE or NodeB relatively receive are determined this special actual error rate that happens suddenly, and upgrade original target SIR according to the target error rate of this actual error rate and preservation; Carry out the power adjustment according to target SIR after upgrading and the actual SIR that measures.
2, method according to claim 1 is characterized in that, this method further comprises: described NodeB or UE obtain the transmission cycle of described special burst in advance.
3, method according to claim 2, it is characterized in that the transmission cycle that described UE obtains special burst in advance is: base station controller RNC is carried the transmission cycle of special burst in the uplink physical channel control messages Uplink Physical Channel Control Message that sends to UE;
The transmission cycle that described NodeB obtains special burst in advance is: RNC sets up the transmission cycle of carrying special burst among the request message Radio Link Setup Request Message at the Radio Link that sends to NodeB.
4, method according to claim 1 is characterized in that,
Described NodeB obtains target error rate: RNC prepares to carry target error rate among the message Radio Link Reconfiguration Prepare Message at wireless link and wireless request for building link message Radio Link Setup Request Message that sends to NodeB and/or radio link reconfiguration;
Described UE obtains target error rate: RNC sets up among message RadioBearer Message and/or the radio bearer reconfiguration message Radio Bearer Reconfiguration Message at the radio bearer that sends to UE and carries target error rate.
5, method according to claim 4, it is characterized in that, in Radio Link SetupRequest Message, Radio Link Reconfiguration Prepare Message, Radio BearerMessage and Radio Bearer Reconfiguration Message, increase the target error rate field in advance newly, in this new field, write the value of target error rate.
6, method according to claim 1 is characterized in that, the actual error rate of the special burst of described basis and target error rate are upgraded target SIR and be:
Calculate continuously N actual error rate, and the weighted average of getting this N value is as the feature error rate;
If described feature error rate then improves a step-length with original target SIR greater than deviator sum on the target error rate of preserving and the target error rate that sets in advance;
If described feature error rate is poor less than deviator under the target error rate of preserving and the target error rate that sets in advance, then determine original target SIR is reduced a step-length;
If described feature error rate is positioned between designation area, then keep original target SIR constant; Between described designation area be the difference of deviator interval between the deviator sum on target error rate and the target error rate under target error rate and the target error rate.
7, method according to claim 1 is characterized in that, the actual error rate of the special burst of described basis and target error rate are upgraded target SIR and be:
After calculating actual error rate, if described actual error rate then improves a step-length with original target SIR greater than deviator sum on the target error rate of preserving and the target error rate that sets in advance;
If described actual error rate is poor less than deviator under the target error rate of preserving and the target error rate that sets in advance, then original target SIR is reduced a step-length;
If described actual error rate is positioned between designation area, then keep original target SIR constant; Between described designation area be the difference of deviator interval between the deviator sum on target error rate and the target error rate under target error rate and the target error rate.
8, according to claim 6 or 7 described methods, it is characterized in that, when NodeB receives special burst for the first time, with enter DTX before the stage up-to-date target SIR as the initial value of target SIR;
When UE receives special burst for the first time, with enter DTX before the stage up-to-date target SIR as the initial value of target SIR.
9, according to claim 6 or 7 described methods, it is characterized in that,
When carrying out uplink power control, this method further comprises: NodeB sets in advance up maximum target SIR and up minimum target SIR; In the closed interval of described up maximum target SIR and up minimum target SIR formation, upgrade target SIR;
When carrying out descending power control, this method further comprises: UE sets in advance descending maximum target SIR and descending minimum target SIR; In the closed interval of described up maximum target SIR and up minimum target SIR formation, upgrade target SIR.
According to the arbitrary described method of claim 1 to 7, it is characterized in that 10, described error rate is a bit error rate.
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| CN2007101193656A CN101350639B (en) | 2007-07-20 | 2007-07-20 | Power control method for non-continuity transmission |
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| CN102196547A (en) * | 2010-03-05 | 2011-09-21 | 中国移动通信集团公司 | Special burst transmission method for time division-synchronous code division multiple access (TD-SCDMA) system |
| CN102281624A (en) * | 2010-06-11 | 2011-12-14 | 中兴通讯股份有限公司 | Control command word transmission method in upstream discontinuous transmission, apparatus thereof and base station |
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| KR100651457B1 (en) * | 1999-02-13 | 2006-11-28 | 삼성전자주식회사 | Method of contiguous outer loop power control in dtx mode of cdma mobile communication system |
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| US6731606B2 (en) * | 2002-01-31 | 2004-05-04 | Qualcomm Incorporated | Power control outer loop for communication channels with discontinuous transmission (DTX) |
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