CN1655472A - Method and apparatus for controlling transmission speed in transmitting power dispatching on a terminal - Google Patents

Abstract

This invention relates to a speed transmission control method for dispatching the terminal emission power, which comprises the following steps: UE choosing TFC and advance informing the selected TFC to Node B; Node B computing UE power adjusting factor according to the needed information in the dispatching formula; UE adjusting the emission power according to power adjusting factors and starting data transmission; Node b receiving data block and sending the decoding or not information to UE.

Description

The control method and the equipment of the transmission rate that the transmitting power of terminal is dispatched

Technical field

The present invention relates to third generation partner plan (being called for short 3GPP) and carry out the special uplink channel (being called for short EUDCH) of the enhancing of third generation mobile, be particularly related in EUDCH, how to realize that the base station controls up transmission, reach quick control up ROT.

Background technology

Second generation mobile communication system comprises GSM and IS (Interim Standard)-95, and main target provides voice service.GSM has adopted the TDMA technology, in commercialization in 1992, is mainly used in Europe and China.And IS-95 adopts is CDMA (Code Division Multiple Access), is mainly used in the U.S. and Korea S.

At present, mobile communication technology has been evolved to 3-G (Generation Three mobile communication system), except voice service is provided, also provides two-forty and high-quality data service and multimedia service.3-G (Generation Three mobile communication system) comprises 3GPP (3 ^RdGeneration Project Partnership) the asynchronous CDMA system of International Standards Organization research (or claim WCDMA, or claim UMTS), i.e. timing between each base station is asynchronous, and 3GPP2 (3 ^RdGeneration Project Partnership 2) synchronous CDMA system of International Standards Organization's research (or claiming CDMA2000).

Synchronous and asynchronous 3-G (Generation Three mobile communication system) is all to providing two-forty, high-quality data packet services to carry out standardization.For example: 3GPP is carrying out standardization to HSDPA (High Speed DownlinkAccess), thereby improves descending data rate, and 3GPP2 is carrying out standardization to 1xEV-DV (Evolution-Data and Voice).3GPP proceeds the enhancing (EUDCH) of ascending packet data transmission again, thereby improves up capacity and covering.EUDCH compares with the up DCH of Rel99/4/5, has introduced HARQ (Hybrid Automatic Retransmission Request) mechanism, and introduces the fast dispatch mechanism of Node B, and sets up new function such as dedicated channel fast.

Accordingly, be necessary the up channel of each sub-district is dispatched so that Resources allocation.EUDCH moves on to Node B to scheduling feature from RNC, to realize fast dispatch.The purpose of uplink scheduling is effectively to utilize finite wireless resources.For example, the target ROT of each sub-district (T_ROT) is the target of the up channel scheduling of this sub-district, with the ROT (M_ROT) that keeps measuring in this sub-district as much as possible near T_ROT.In fact, according to the state of this sub-district and adjacent cells, can find the T_ROT of an optimum, and up channel scheduling makes the actual M_ROT that records near T_ROT, and the variation of M_ROT is when very little, then the up of system can obtain optimum performance.Formula (1) is seen in the definition of ROT:

$\mathrm{ROT}=\frac{I_0}{N_0}---\left(1\right)$

Wherein, Io is all signal strength signal intensity sums that Node B receives, i.e. the overall with band received signal power spectrum density of Node B, and No is the power spectral density of the thermal noise of Node B.

Because No is time to time change hardly, so ROT is mainly determined by Io.If ROT is less, illustrate that signal strength signal intensity that Node B receives a little less than.Though the interference that terminal is received is less, the load of Node B is also less.Yet, if ROT is bigger, illustrate that Node B has higher load, but mean that also the interference that terminal receives is bigger, just cause the reduction of link performance, thereby reduced the performance of whole system.The performance of balance ROT and whole system makes whole system obtain load that the ROT of the optimum of optimum performance can be by taking all factors into consideration Node B and the noise intensity of terminal obtains.

At present, mainly proposed two kinds of scheduling modes among the TR25.896: one is based on the rate scheduling of Node B control, and two are based on the speed and the time scheduling of NodeB control.

In rate scheduling mode based on Node B control, each terminal (being called for short UE) is in the initialization procedure of dedicated transmission channel, UE and base station controller (being called for short RNC) are consulted, both have set up a transmission format composite set (being called for short TFCS), these TFCS have comprised multiple transmission rate, and can sort according to the TFC among the TFCS of transmission rate team.For a UE, RNC sets the TFCS subclass (TFCS Subset) that a Node B permission is used this UE, and Node B sets the TFCS subclass (TFCS Subset) that this UE permission is used.The TFCS subclass that Node B allows to use comprises the TFCS subclass that UE allows use, and passes to UE by signaling.Node B can change the TFCS subclass that UE allows use by physical layer signaling each dispatching cycle, thereby can adapt to the variation of ascending load, reaches the purpose of fast dispatch.

Because the TFC among the TFCS can sort according to speed, so each subclass is represented with pointer.Node B allows the subclass of use, with a Node B pointer indication, and the some TFC of Node B pointed, all transmission rates all belong to the subclass that Node B allows use smaller or equal to the element of this TFC.Equally, a TFC of transmission rate maximum in the TFCS subclass of UE pointed UE permission use.Referring to Fig. 1, this is an illustration about Node B pointer and UE pointer.Among the figure, the TFCS of RNC definition has 11, is that TFC0 is to TFC10 after sorting according to transmitting power (with the data rate equivalence).The UE pointer is TFC7, so the TFCS subclass that UE allows to use is that TFC7 is to TFC10.The NodeB pointer is TFC3, so the TFCS subclass that Node B allows this UE is used is that TFC3 is to TFC10.

UE can be in the TFCS subclass that UE allow to use according to Rel99 in existing TFC selection algorithm calculate the current TFC that will use, that is to say that the operable peak transfer rate of UE is exactly the TFC of UE pointer indication.Because the peak transfer rate of UE is the TFC that UE pointer lock points to, so in the description of back, no longer distinguish the peak transfer rate that changes UE and change the UE pointer, they are meanings.UE can improve the peak transfer rate that UE allows to Node B request, has both increased the TFCS subclass that UE allows use, and whether Node B allows to increase according to current up ROT situation decision, tells to UE by dedicated channel.Node B also can initiatively reduce the peak transfer rate that UE allows according to the situation of current ROT.

In speed and time scheduling based on NodeB control, UE is before carrying out transfer of data, the information that the dispatching algorithm of Node B need be used is (as buffer status, it is buffer status, with power margin, i.e. power headroom) issue Node B to carry out the request of transfer of data, NodeB is according to the information of receiving, calculate the quality of the wireless channel of UE, and unify scheduling according to current ROT situation.Node B tell UE by physical layer signaling, with great speed, when carries out transfer of data.UE sends in the time of appointment according to Node B specified transmission rate.

In TR25.896, existing two kinds of dispatching methods, a kind of is rate scheduling, another kind is the scheduling of time and speed.In two kinds of schemes, scheduling feature all is present in the Node B entity.

For the rate scheduling of Node B control, need be rate request RR (Rate Request) in the control signaling of special uplink channel transmission, need be speed is confirmed RG (Rate Grant) in the control signaling of downlink dedicated channels transmission.UE utilizes RR to improve the UE pointer to Node B request, increases the peak transfer rate of UE.The ROT situation of Node B reference equivalent and other some schedule informations determine whether to agree the request of this UE, and the result are sent to UE by RG.Do not offer some clarification among the existing TR, when UE asked to improve the UE pointer at every turn, the UE pointer was to improve a TFC or a plurality of TFC.Below, we may illustrate respectively according to two kinds:

Suppose only to comprise the information that improves or reduce the UE pointer in the solicited message of RR, RR only needs an information bit position just much of that so.All must transmit because RR is each frame,, just can reduce more because the reduction of the data transmission capabilities that the transmitting and scheduling signaling is brought so the bit number that it occupies is few more.But problem is, UE receive at every turn Node B sure reply after, the UE pointer all can only improve a TFC.If sometime, there is a large amount of Radio Resources in system, and UE also has lot of data to need transmission, but the raising that the peak data transfer rate of UE can only be step by step transmits on the suitable data speed and can not leap to, and this is a kind of waste of resource.

Suppose that UE in the solicited message of RR, has indicated the position of desired UE pointer, also just say that many bits of RR needs could be represented the information of response so if allow the UE pointer directly to move on on non-conterminous another TFC from a TFC.If like this, because transmission RR, the reduction of the data transmission capabilities that brings will be bigger.May offset the gain that Node B dispatching office brings like this.

For the time and the rate scheduling of Node B control, owing in each dispatching cycle, all need the needed information of Node B dispatching algorithm is sent to Node B from UE, as buffer status, i.e. buffer status and power margin, i.e. power headroom.Even it is no exception to transmit a very little packet.This a large amount of additional information that sends for scheduling has also increased the load of system, also may offset the gain that scheduling brings to a certain extent.

Summary of the invention

The purpose of this invention is to provide a kind of method of the rate scheduling based on Node B control, carry out certain management, reach the purpose that the actual transfer rate of the terminal of UE is controlled by transmitting power to terminal.

For achieving the above object, according to an aspect of of the present present invention, a kind of control method of the transmission rate that the transmitting power of terminal is dispatched comprises step:

UE selects TFC, and prior notice selected TFC give Node B;

Node B calculates the power adjusting factor of UE according to the information of needs in the dispatching algorithm;

UE carries out the adjustment of transmitting power according to power adjusting factor, and begins to transmit data;

Node B receives data block, and sends whether successful information of decoding is to UE.

According to another aspect of the present invention, a kind of Node B that uses claim 1 method comprises sending part and receiving unit, also comprises:

Dispatching control module (614), be used to judge the quality of the quality of wireless channel of UE, according to the received power of the TFCI calculating of receiving to the data needs of UE transmission next time, according to the quality of the quality of wireless channel of current ROT situation, UE, the information such as received power of UE transmission next time needs, the utilization dispatching algorithm produces the power adjusting factor of this UE;

Coding module (612), according to the power adjusting factor GA that control module produces, GA encodes to power adjusting factor;

Through the GA of coding with the out of Memory of giving UE after multiplexer is multiplexing, be transmitted to UE after the resume module by the multiplexer back of radiating portion.

According to another aspect of the present invention, a kind of UE equipment that uses claim 1 method comprises sending part and receiving unit, also comprises:

GA module (702) obtains GA behind the downlink data signal demultiplexing of Node B transmission;

GA control module (728), when the data block that sends was the data block of a re-transmission, the GA that this module comparison Node B gives and this data block also needed the power factor transmitted, if the former is bigger than the latter, then adjust the value of GA, to reduce the transmission of unnecessary power for the latter.

Node B of the present invention is by utilizing the control to the up transmitting power of UE, and each packet of in fact in a disguised form having controlled must retransmit, thereby reaches the purpose to upstream rate control.Advantage is, in scheduling with reference to the quality of wireless channel of UE, allow the good UE high power transmission of quality of wireless channel, allow the UE low-power transmission of quality of wireless channel difference, but thereby the capacity of raising up link, simultaneously when rated output is adjusted the factor, target is exactly to make the target ROT of the ROT of Node B and system approaching, thereby increases the capacity and the cell coverage area of up-link.

Description of drawings

Fig. 1 is the schematic diagram of Node B pointer and UE pointer;

Fig. 2 is the time chart that sends data;

Fig. 3 is the relation of DPDCH and TFCI in the R99 standard;

Fig. 4 is the action flow chart of UE

Fig. 5 is the action flow chart of Node B;

Fig. 6 is Node B apparatus figure;

Fig. 7 is the apparatus figure of UE.

Embodiment

The present invention is the method based on the rate scheduling of transmit power management of a kind of Node B control.Among the present invention, UE carries out the selection of TFC according to the TFC selection algorithm in the R99 standard, and prior notice is given Node B, when sending selected TFC in advance, sending additional schedule information (mainly is the parameter that is used to calculate the UE wireless signal, the transmitting power current, the perhaps current transmission power of UE as UE) to Node B.Then, Node B produces the factor that a power is adjusted according to current ROT situation and the information such as radio channel state of this UE to this UE, carries out the transmission of data after the UE adjustment transmitting power again.Node B can merge decoding with the energy that UE repeatedly launches same packet.By scheduling to the UE transmitting power, in fact reached control to the number of retransmissions of this UE, owing to controlled re-transmission, the also actual transfer rate of this UE of control just.

The time chart that sends a data block is referring to illustration 2:

UE at T1 constantly, send selected TFC and additional schedule information (SI) and give Node B, after the Node B reception information, according to current ROT situation, the received power that the data of the TFC correspondence that UE is selected need, and the situation of this UE current time wireless channel that draws with reference to additional schedule information etc., calculate a power adjusting factor GA according to dispatching algorithm, at T2 constantly, send GA to UE.UE at first calculates the data block desired power of emission TFC correspondence, on the basis of this power, adjusts according to the power adjusting factor of Node B again.UE is in the T3 moment, according to adjusted power emission data..Node B sends the information (Ack or Nack) whether data successfully receive constantly at T4.

Concretely, method of the present invention comprises following important process:

1) UE selects TFC, the TFC that prior notice is selected;

2) Node B calculates the power adjusting factor of this UE according to the information of needs in the dispatching algorithm;

3) UE carries out the adjustment of transmitting power according to power adjusting factor, and begins to transmit data;

4) Node B receives data block, and sends whether successful information of decoding is to UE.

Below, each process is described in detail

Process 1, UE selects TFC, the TFC that prior notice is selected.

In the R99 of 3GPP version standard TS25.321, at length defined the TFC selection algorithm.Each uses the UE of dedicated channel that the TFCS of one group of RNC configuration and management is arranged, and UE is in the TFCS of RNC appointment set, and the TFC selection algorithm of operating specification definition is selected the employed TFC of next TTI.

Among the present invention, UE still adopts the TFC selection algorithm that defines among the R99, the TFC that selects will be sent to Node B in advance but difference is UE, the subsidiary simultaneously additional schedule information that is used to dispatch that sends.Referring to Fig. 3, in the standard of existing version, the DPCCH of the DPDCH of transmission data and transmission TFCI transmits simultaneously, just, must be synchronized transmission for DPDCH and the DPCCH of same TTI.And in the present invention, the key of step 1 is, in advance the TFC that selects is notified to NodeB.UE just sends corresponding D PDCH after the power adjusting factor of receiving Node B.Another difference of TFC selection algorithm is, works as retransmission data packet may, selected TFC must and the first time during transmits data packets used TFC identical.

Because DPCCH sends at different code channels with DPCCH, see Fig. 2, when sending the DPDCH of a TTI, also can send the TFC of next TTI simultaneously, so in fact TFC and corresponding DPDCH asynchronous transmission do not increase the time delay of transfer of data.

Another feature is exactly when sending TFC, to attach an additional schedule information.The purpose of this information is to allow Node B can understand the situation of the wireless channel of this UE.Attached information can be the transmitting power of UE, or the transmission power of UE.Node B can measure the current received power of this UE.If additional information is the transmitting power of UE, deduct received power with transmitting power so, be exactly the current path loss of UE.If additional information is the transmission power of UE, Node B is according to the Capability of this UE, can know the maximum transmission power of this UE, maximum transmission power deducts the transmitting power that transmission power just knows that UE is current, can calculate the path loss of UE with that.

Need to prove that additional schedule information is an optional method.In process 2, two kinds of methods of judging the current UE quality of wireless channel have been provided.Wherein, a kind of method needs additional schedule information, and another kind of method does not need this information.If adopt the latter, UE does not need to send additional schedule information so.

Process 2, Node B calculates the power adjusting factor of this UE according to the information of needs in the dispatching algorithm.

Definition of T _ ROT is the optimum ROT of system, if the actual ROT of system surpasses T_ROT, the link performance of system can reduce significantly.If the actual ROT of system is lower than T_ROT, there is the situation of waste Radio Resource.So keeping the ROT of system is the target of Node B scheduling as best one can near T_ROT.T_ROT generally can be by calculating the uplink interference of this sub-district, the interference of adjacent sub-district, and factors such as system's thermal noise of Node B finally select the value of an optimum, and it remained unchanged generally in a period of time.In fact, the essence of Node B scheduling will make ROT be no more than T_ROT by scheduling exactly, but waste of radio resources lacking of trying one's best again.

When Node B carried out power dispatching, the foundation of one of them reference was the quality of UE current wireless channel.The method of judging quality of wireless channel can be a lot, and the present invention provides two kinds of methods, is respectively:

First method is, utilize the path loss X of additional schedule information calculations current UE, if path loss X illustrates that then current wireless channel is relatively poor, otherwise thinks that the current wireless channel ratio is better greater than the average path loss X in a period of time recently.The length of " a period of time recently " can or be passed through network configuration by normalized definition.

Second method is to observe N apart from the nearest downlink power control order TPC of current time.If the TPC order for the number of " Up " surpasses N/2, illustrates that the signal of UE emission is absorbed in the decline deep valley, wireless channel is relatively poor, otherwise, illustrate that wireless channel is good.Certainly, the value of N can or be passed through network configuration by normalized definition.

When the algorithm of designing and calculating power adjusting factor, the principle of foundation is: for quality of wireless channel UE preferably, give and high transmitting power as much as possible, UE for the quality of wireless channel difference, when the ROT of Node B aboundresources (actual ROT and target ROT have very big gap), can give and its transmitting power that needs, but when in the ROT of Node B resource scarcity, dispatch it with lower transmitting power transmission, force it repeatedly to retransmit.The algorithm of scheduling can be a lot, as long as meet the above-mentioned principle of mentioning.Provide an example that calculates GA herein.

Poor when the quality of wireless channel of UE, make GA=0, promptly UE is 0 at the power that next TTI sends DPDCH.For quality of wireless channel preferably the UE rated output to adjust the method for factor GA as follows:

We know that ROT is defined as $\mathrm{ROT}=\frac{I_0}{{\mathrm{<figure-callout\; id="0"\; label="N"\; filenames="A20041000495600191.png"\; state="\{\{state\}\}">N</figure-callout>}}_0},$ Wherein, Io is all signal strength signal intensity sums that Node B receives, i.e. the overall with band received signal power spectrum density of Node B, and No is the power spectral density of the thermal noise of Node B, is a time dependent hardly amount.That is:

$I_0=\underset{i=0}{\mathrm{\&Sigma;}}{S}_i+I_{\mathrm{oc}},---\left(2\right)$

S wherein _iBe that i UE is in the received power of Node B end in the sub-district, n is the number of the UE sub-district in, Ioc be all from the power of the interference signal of adjacent sub-district with.If certain UE changes transmission rate, must change transmitting power, at Node B end, the variation of the received power of this UE is bound to the variation of ROT is had contribution, because variation has taken place the received power S of this UE so.Be the variation of UE transmitting power, the ROT of Node B side is had direct influence.

Suppose that sometime, certain UE is S in the received power of Node B _k, the ROT of Node B is ROT ₁, after next frame changed TFC, received power was S _k', the ROT of Node B Node B is ROT ₂And suppose that the received power of other UE is all constant substantially in this process, GA should make ROT2 near T_ROT so, so calculate the equation of GA is:

T_ROT-ROT ₂＝0 (3)

Wherein, ROT ₂=ROT ₁+ (S _k' * GA-S _k)/N ₀

Finally, the formula of the power adjusting factor of transmission calculating UE is:

$\mathrm{GA}=\frac{(T\_\mathrm{ROT}-\mathrm{RO}{T}_1)*{\mathrm{<figure-callout\; id="0"\; label="N"\; filenames="A20041000495600191.png"\; state="\{\{state\}\}">N</figure-callout>}}_0+S_k}{{S_k}^{\&prime;}}---\left(4\right)$

At last, if GA＞1 illustrates that the enough new TFC desired power of existing Radio Resource changes, and makes GA=1.

Process 3 UE carry out the adjustment of transmitting power according to power adjusting factor, and begin to transmit data.

After UE receives GA, begin to carry out transfer of data.Suppose that it is P that UE calculates the transmitting power of carrying out transfer of data and need according to the TFC that sends in advance, the final transmitting power of UE is exactly P*GA so.

But if data block is the piece of a re-transmission, UE will need to have done following calculating:

Suppose that this piece had transmitted n time, each power adjusting factor is respectively: GA ₁, GA ₂... GA _nIf $\mathrm{GA}>1-\underset{i=1}{\mathrm{\&Sigma;}}G{A}_i,$ Then $\mathrm{GA}=1-\underset{i=1}{\mathrm{\&Sigma;}}{\mathrm{GA}}_i,$ Otherwise GA remains unchanged.With the mathematical formulae description be exactly:

$\mathrm{GA}=\min \{(1-\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{\mathrm{GA}}_i),\mathrm{GA}\}---\left(5\right)$

And then resend this data block with the power of P*GA.

Process 4, Node B receives data block, and sends whether successful information of decoding is to UE.

After UE sent data .Node B carried out the decoding work of data, and was sent in the information (ACK or NACK) whether data successfully receive and gives UE.If be NACK, UE then retransmits the data of transmission just now, otherwise the data of transmission letter.

After these four processes finish, just begin Next dispatching cycle, repeating four processes once more.

The action flow chart of UE in scheduling process seen Fig. 4.

In step 401, UE is according to the size of data volume to be sent among the current Buffer, and current transmitting power and the factors such as maximum transmission power of UE are according to the algorithm that defines in the standard, select suitable TFC, and calculate the size of using selected TFC to send data desired power P.If the packet before retransmitting, the TFC when then keeping TFC and sending data for the first time is the same.Then carry out the operation of step 402.

In step 402, UE measures current transmitting power SI.Owing to whether use SI and Node B to judge that the method for UE wireless channel is relevant,,, then need this process, otherwise need not measure SI if Node B uses SI to calculate the UE quality of wireless channel so this step is optionally individual.Then in step 403, UE sends to Node B with the selected TFC and the SI of measurement.Equally, whether SI sends and depends on that Node B calculates the algorithm of wireless channel.

After having sent TFC and SI, Node B can carry out power dispatching according to TFC and the quality of wireless channel of UE, so UE in following step 404, receives the power dispatching factor GA that Node B sends.

Step 405 is decision operation, determines whether this time transmission is the data block of a repeating transmission, because when retransmitting, and the power that sent before UE need calculate.If retransmit, enter 406 operations, otherwise directly enter 407 operations.

In step 406, the ratio of the power that before UE at first calculates these data was sent, i.e. Yi Qian power dispatching factor sum, so Be exactly the remaining power factor that needs transmission, then, be that the power adjusting factor GA of this sub-distribution of Node B compares.If GA greater than remaining power factor, just only sends remaining power and gets final product, even power factor equals the dump power factor.Otherwise power adjusting factor is constant.Promptly $\mathrm{GA}=\min \{(1-\underset{i=1}{\mathrm{\&Sigma;}}{\mathrm{GA}}_i),\mathrm{GA}\}.$

In step 407, UE retransmits this data block with the power of P*GA.And then in 408, receive from the whether successful information of the decoding of Node B, promptly receive Ack or Nack.According to this information, it is to pass new packet or carry out the re-transmission of this packet that UE can determine in the next cycle.Enter next data transmitting period then.

The action flow chart of Node B in scheduling process seen Fig. 5.

In the first step 501, Node B receives TFC and the SI that UE sends.And then in step 502, measure current ROT value and the present received power S of this UE, for power dispatching is prepared.

In step 503, Node B calculates, if UE adopts the TFC that has just received to send data in the next moment, the received power that needs is S '.This also prepares for power dispatching.

Then, in 504 operations, Node B judges the quality of wireless channel of this UE.The quality of wireless channel of UE is carried out determination methods to be had multiplely, and invention has in front provided two kinds of methods in describing, and is respectively to calculate and judge with reference to descending power control commands of a period of time recently according to additional schedule information SI.If judge that the quality of wireless channel of UE is good, then carry out 505 operations, be responsible for carrying out 506 operations.

In the step 505,, the computational methods of GA have been provided when the quality of wireless channel of UE is better according to formula (4).In the step 506, be to be the quality of wireless channel of UE situation preferably, allow GA=0, promptly allow UE not send data (power that promptly sends data block is zero, but DPCCH still will send) in the next cycle.Need to prove that the method for calculating GA in 505 and 506 is an example of the present invention.In fact, as long as meet the principle of the power dispatching that front invention mentions in describing, other GA produce algorithm too can, just dispatching effect is slightly variant.

Next, in step 507, Node B sends to UE with the GA that produces previously, and prepares to receive the data that UE sends.In step 508, the data that Node B receives and decoding UE sends.And in 509, say that decoded results sends to this UE, promptly sends Ack or Nack.Just begin next dispatching cycle then.

Fig. 6 is, used the equipment drawing of the Node B after the method for the present invention.

Module 601 to 610 is functional modules of the receiving subscriber data of Node B, and module 611 to 628 is to send data module.Most module is that the existing function of Node B is fast.After adopting method of the present invention, main newly-increased module is 611,612 and to 614.The TFCI of receiving unit (606) is the existing existing functional block of Node B, but changes slightly in use.Describe in detail as follows

Referring to Fig. 6, TFCI (606) in existing Node B, indication be the information of the transformat combination of the data division (DPDCH) in the same TTI, and the indication of the TFCI in this figure is, next transformat combination that promptly will data block transmitted.The TFCI of the data of transmitting simultaneously with this TFCI transmitted in the previous cycle.

Referring to Fig. 6, the 614th, dispatching control module, its major function has: the quality of 1) judging the quality of wireless channel of this UE.2) according to the received power of the TFCI calculating of receiving to the data needs of UE transmission next time.3) according to current ROT situation, the quality of the quality of wireless channel of UE, the UE information such as received power that next time, transmission needed, the utilization dispatching algorithm produces the power adjusting factor GA of this UE.

After dispatching control module 614 produced power adjusting factor GA (611), coding module (612) was responsible for GA is encoded.GA through coding after, with the out of Memory of giving this UE, as the back Ack/Nack that encodes, the downlink data through coding, after interweaving, TPC, TFCI, Pilot etc. are together multiplexing, send to UE through the module of back.

Data after 621 to 628 pairs of modules are multiplexing are carried out the processing before radio frequency sends.621 modules are gone here and there to the data after multiplexing and are changed, 622 modules are to I, the Q two paths of signals carries out spread spectrum, 623 modules are carried out 90 phase shifts to Q road signal, 624 modules are to I, and the Q two paths of signals merges, and 625 modules are handled signal weighting, 626 modules are modulated (627) and radio frequency at last again and are loaded (628) again to the signal scrambling operation.Finally, send by antenna 630.

Fig. 7 is to have used the equipment drawing of the UE behind the present invention.

Module 701 to 707 is functional modules that UE receives data, and module 710 to 727 is to send data module.Most module is that the existing existing function of UE is fast.After adopting method of the present invention, main newly-increased module is 702 and 728.Send the TFCI (718) of part, be the existing existing functional block of UE, but change slightly in use.Describe in detail as follows:

Referring to Fig. 7, TFCI (718) is in existing UE, indication be the information of the transformat combination of the data division ((E)-DPDCH code channel) in the same TTI, and the TFCI of the UE in this figure indication is, the transformat combination that the UE next one promptly will data block transmitted.Just in data block of transmission, the transmission next one is wanted the TFCI of data block transmitted simultaneously.

In Fig. 7, GA (702) is the information that UE obtains after the downlink data signal demultiplexing that Node B is sent, and this is that the GA that dispatching control module is produced has been multiplexed in the data of UE because Node B is when sending downlink data.After solving the information of GA, GA is sent in the GA controller module.

Referring to Fig. 7, the 728th, the GA control module, its function is: when the data block that sends is the data block of a re-transmission, the GA that this module comparison Node B gives and this data block also need the power factor transmitted, if the former is bigger than the latter, then adjust the value of GA, to reduce the transmission of unnecessary power for the latter.After GA control module (728) is carried out last adjustment to GA, at last the weight 722 of the data division ((E)-DPDCH code channel) of UE is adjusted.

Claims (10)

1. the control method of the transmission rate that the transmitting power of terminal is dispatched comprises step:

UE selects TFC, and prior notice selected TFC give Node B;

Node B calculates the power adjusting factor of UE according to the information of needs in the dispatching algorithm;

UE carries out the adjustment of transmitting power according to power adjusting factor, and begins to transmit data;

Node B receives data block, and sends whether successful information of decoding is to UE.

2. by the described method of claim 1, it is characterized in that the selected TFC of described prior notice comprises that the packet of the TFC correspondence of being transmitted will transmit in the next cycle.

3. by the described method of claim 1, it is characterized in that described UE selects TFC to comprise: when retransmission data packet may, the TFC of selection must be identical with the TFC of transmission for the first time.

4. by the described method of claim 1, it is characterized in that the information of described Node B according to needs in the dispatching algorithm, the power adjusting factor of calculating UE comprises:

For quality of wireless channel UE preferably, give and high transmitting power;

For the UE of quality of wireless channel difference, when the ROT of Node B aboundresources, give and its transmitting power that needs, but when in the ROT of Node B resource scarcity, dispatch it with lower transmitting power transmission, force it repeatedly to retransmit.

5. by the described method of claim 4, it is characterized in that described Node B need judge the quality of the wireless channel of a UE, comprises step:

Utilize the path loss X of additional schedule information calculations current UE;

If path loss X illustrates that then current wireless channel is relatively poor, otherwise thinks that the current wireless channel ratio is better greater than the average path loss X in a period of time recently.

6. by the described method of claim 4, it is characterized in that described Node B need judge the quality of the wireless channel of a UE, comprises step:

Observe N apart from the nearest downlink power control order TPC of current time;

If the TPC order surpasses N/2 for the number of " Up ", wireless channel is relatively poor, otherwise, illustrate that wireless channel is good.

7. by the described method of claim 1, the algorithm that it is characterized in that described Node B calculating UE power adjusting factor comprises: for the UE of quality of wireless channel difference, power adjusting factor GA=0, for the good UE of quality of wireless channel, the computing formula of power adjusting factor GA is:

$\mathrm{GA}=\frac{(T\_\mathrm{ROT}-{\mathrm{ROT}}_1)*N_0+S_k}{{S_k}^{\&prime;}}$

S wherein _kBe the current received power of this UE, S _k' be to send the received power that needs behind the packet at next cycle UE, T_ROT is the target ROT of Node B scheduling, ROT ₁Be current be the ROT of a Node B, N ₀Be the power spectral density of the thermal noise of Node B, when the GA that calculates＞1, make GA=1.

8. by the described method of claim 1, it is characterized in that describedly carrying out the power adjustment and comprising step: when this packet is when transmitting for the first time, GA remains unchanged, if this packet is the bag of a re-transmission, then GA adjusts according to following formula:

$\mathrm{GA}=\min \{(1-\underset{i=1}{\mathrm{\&Sigma;}}{\mathrm{GA}}_i),\mathrm{GA}\}$

GA wherein _iPower adjusting factor when being the i time re-transmission of this packet, n is the number of times that this packet had transmitted before.

9. a Node B who uses claim 1 method comprises sending part and receiving unit, it is characterized in that also comprising:

Dispatching control module (614), be used to judge the quality of the quality of wireless channel of UE, according to the received power of the TFCI calculating of receiving to the data needs of UE transmission next time, according to the quality of the quality of wireless channel of current ROT situation, UE, the information such as received power of UE transmission next time needs, the utilization dispatching algorithm produces the power adjusting factor of this UE;

Coding module (612), according to the power adjusting factor GA that control module produces, GA encodes to power adjusting factor;

Through the GA of coding with the out of Memory of giving UE after multiplexer is multiplexing, be transmitted to UE after the resume module by the multiplexer back of radiating portion.

10. a UE equipment that uses claim 1 method comprises sending part and receiving unit, it is characterized in that also comprising:

GA module (702) obtains GA behind the downlink data signal demultiplexing of Node B transmission;

GA control module (728), when the data block that sends was the data block of a re-transmission, the GA that this module comparison Node B gives and this data block also needed the power factor transmitted, if the former is bigger than the latter, then adjust the value of GA, to reduce the transmission of unnecessary power for the latter.

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