CN101616477A - The method and the device of control reverse traffic rate in the mobile communication system - Google Patents

Abstract

A kind of with the data rate from a plurality of data rates, selected at the system and method that to the base station sends the mobile communication system of reverse packet data frame, is used to control the data rate of next reverse packet data frame on the reverse packet data channel from mobile radio station.This mobile radio station receives the reverse control information of the data rate that is used for the reverse packet data frame, and to send next reverse packet data frame according to this reverse control information determined data rate.

Description

The method and the device of control reverse traffic rate in the mobile communication system

The application be that March 5, application number in 2004 are 200480005988.5 the applying date, denomination of invention divides an application for the application for a patent for invention of " method and the device of control reverse traffic rate in the mobile communication system ".

Technical field

The present invention relates generally to a kind of mobile communication system, particularly a kind of staggered rate controlled (interlaced rate control, IRC) method and device that is used for effectively controlling reverse traffic (traffic).

Background technology

Usually, in code division multiple access (CDMA) mobile communication system, use same frequency band to support multimedia service.Mobile radio station sends data to the base station simultaneously, and realizes the sign of mobile radio station by unique spreading code of distributing to mobile radio station.

(physical layer packet, PLP) (reversepacket data channel, the reverse data that carries out on R-PDCH) from the mobile radio station to the base station sends, and fixed packet length in reverse packet data channel by physical layer packet.For each throughput is variable, and according to the power of the mobile radio station that sends respond packet, send the total amount of data, at forward direction rate control channel (forward rate controlchannel, RCCH) (rate control bit RCB) controls the data rate of each grouping to go up the rate controlled bit provide from the base station.

The base station is by using the recruitment thermal noise than (Rise over Thermal, RoT) or the signal to noise ratio (signal-to-noise of the mobile radio station from use, SNR) reverse rate of mobile radio station is determined in the load of Huo Deing, and the recruitment thermal noise is than the ratio that is total received power and thermal noise.When using RoT, the reverse rate of control mobile radio station is so that the RoT of corresponding mobile radio station approaches with reference to RoT, and when RoT is unavailable, the reverse rate of controlling mobile radio station is so that the load of corresponding mobile radio station approaches reference load.That is the RoT of the mobile radio station during, use based on all base station, total amount, the power rating of transmission data are determined to increase, minimizing still is the data rate that keeps each mobile radio station.If effectively controlled the speed of mobile radio station, then can increase the throughput of whole system.

(reversecontrol bit, form RCB) sends to the corresponding mobile station with reverse control bit with the information of the determined rate controlled that is used for mobile radio station in base station.If the RCB value that receives from the base station is "+1 " of indication " speed increase ", then mobile radio station increases reverse rate in next sends at interval.If the RCB value is " 1 " of indication " speed decline ", then mobile radio station reduces reverse rate in next sends at interval.If the RCB value is " 0 " of indication " speed maintenance ", then mobile radio station keeps current reverse rate in next sends at interval.

In some system, the service pilot power ratio of base stations control mobile radio station (traffic-to-pilot powerratio, TPR) rather than control mobile radio station data rate.In conventional mobile communication system, power control is carried out in the reverse transmission of mobile radio station by the base station.In the power control and treatment, mobile radio station is directly controlled the power of pilot channel according to the power control command that receives from the base station, and controls channel except pilot channel according to the TPR with fixed value.For example, if TPR is 3dB, this indication is 2: 1 by the Traffic Channel of mobile radio station transmission and the power ratio of pilot channel.Thereby mobile radio station determines that the power gain of Traffic Channel makes Traffic Channel be higher than the pilot channel twice aspect power.

Even for the channel of other type, the gain of respective channel is compared with the gain of pilot channel also has fixed value.In a kind of method by base stations control TPR, in the reverse transmission of a plurality of mobile radio stations by the scheduling controlling base station, notifications are for the TPR that each mobile radio station allowed, rather than directly notify scheduling result as data rate.Here, TPR increases according to the increase of data rate.For example, if data rate increases twice, then mobile radio station is distributed to the about twice of power increase of Traffic Channel, this means TPR is doubled.

In conventional mobile communication system, the data rate of reverse traffic channel and the relation between the TPR are known in advance from information table for mobile radio station and base station.Thereby in fact, the data rate of control mobile radio station is equal to the TPR that controls mobile radio station.Here, the method to a kind of data rate by the base stations control mobile radio station only is described.

Fig. 1 is diagram is determined the operation of reverse rate by mobile radio station according to prior art a flow chart.Mobile radio station can be supported 9.6Kbps, 19.2Kbps, 38.4Kbps, 76.8Kbps, 153.6Kbps, 307.2Kbps at least for R-PDCH, and can progressively increase, reduce or keep reverse rate according to rate controlled bit (RCB).

With reference to figure 1, in step 110, the rate controlled bit that mobile radio station receiving velocity control bit (RCB) and analysis receive.In step 120, mobile radio station determines whether the value of rate controlled bit indicates " speed increase ".If the value of rate controlled bit is "+1 " of indication " speed increase ", then in step 130, the speed that mobile radio station will use in next time interval is set to increase than the speed of current time interval the value (or speed) of a step-length, advances to step 170 then.

But if the value of rate controlled bit is not "+1 " of indication " speed increase ", then mobile radio station determines in step 140 whether the value of rate controlled bit indicates " speed decline ".If determining the value of rate controlled bit is " 1 " of indication " speed decline ", then in step 150, the speed that mobile radio station will use in next time interval is set to reduce than the speed of current time interval the value of a step-length, advances to step 170 then.

But, not " 1 " of indication " speed decline " if determine the value of rate controlled bit, then in step 160, the speed that mobile radio station will use in next time interval is set to the value identical with the speed of current time interval.In step 170, mobile radio station sends Frame according to determined speed in next time interval.

Fig. 2 is diagram is determined the operation of reverse rate by mobile radio station according to prior art a sequential chart.Send a RCB from the base station to mobile radio station for each time interval.RCB be used to be controlled at mobile radio station next send the reverse rate of R-PDCH at interval.

With reference to figure 2, in time interval t0, mobile radio station is gone up the transmission Frame with the speed (referring to 210) of 9.6Kbps at Packet Data Channel (PDCH).In time interval t1, the base station is considered the power rating of RoT, buffer state, corresponding mobile radio station and determined to increase, reduces still is the data rate that keeps mobile radio station, produce RCB according to definite result, the RCB that transmission is produced is to mobile radio station (referring to 220).Mobile radio station receives RCB, analyzes RCB and determines in next time interval t2 it is increase, reduces or the speed of maintenance PDCH then.

But, in this method of rate control, owing to the delay between the moment of practical application RCB in the moment that in the base station, produces RCB and the mobile radio station, so rate controlled can not be carried out to its mobile radio station effectively in the base station.

For example, in time interval t5, the base station is the Frame of 153.6Kbps from the mobile radio station receiving velocity, and at one time at interval in, the base station is determined the data rate of mobile radio station is increased a step-length, produces corresponding RCB (+) and sends the RCB (+1) that produced to mobile radio station from the present rate of 153.6Kbps according to the situation of other mobile radio station.But, in fact, because send RCB (+), so consider that when mobile radio station receives RCB (+) and analysis RCB (+) the required time, then the time interval of practical application RCB (+) became t7 at time interval t6.As a result, in time interval t7, mobile radio station is provided with speed 614.4Kbps, and it has increased a step-length than the speed 307.2Kbps of time interval t6 formerly.

When several mobile radio stations sent reverse data simultaneously, the data that other mobile radio station sends became the interference to the signal of specific mobile radio station.Thereby the base station is so that carry out control operation by all speed of the data of mobile radio station transmission or the mode that all RoT values should not exceed certain threshold level in the sub-district.In this case, when the base station increased the data rate of specific mobile radio station, the data rate of other base station must be reduced in the base station.Therefore, the data throughout that receives the mobile radio station of data, services from certain base station depends on the efficient of reverse rate control.

But as shown in Figure 2, mobile radio station determines than the time interval formerly that according to the RCB that receives from the base station employed data rate is to increase, reduce or keep next data rate.In this case, because the moment when in the base station, producing RCB and the delay between the moment during practical application RCB in mobile radio station, so can not carry out reverse rate control effectively, thus the deterioration of the data throughout of whole system caused.

Summary of the invention

Thereby, an object of the present invention is to provide a kind of method and apparatus, be used for considering simultaneously the delay between RCB application time of rate controlled bit (RCB) generation time of base station and mobile radio station at mobile communication system control reverse rate.

Another object of the present invention provides a kind of method and apparatus that is used for controlling by effective reverse rate the throughput that improves whole system.

According to an aspect of the present invention, a kind of method that is used to control the data rate of next reverse packet data frame is provided in following mobile station system, this mobile station system is used for sending the reverse packet data frame from mobile radio station to the base station with the data rate of selecting from a plurality of data rates on reverse packet data channel, send the reverse packet data frame by the reverse control information that on the forward direction rate control channel, sends to mobile radio station from the base station, and control the data rate of next reverse packet data frame then, described method comprises the steps: by mobile radio station by increase or the minimizing information of reverse control information reception for the data rate of reverse packet data frame; And after receiving this increase or minimizing information, to send next reverse packet data frame from the data rate that selected data rate increases or reduces and obtains in response to this increase or minimizing information.

According to a further aspect in the invention, a kind of method that is used to control the data rate of next reverse packet data frame is provided in following mobile station system, this mobile station system is used for sending the reverse packet data frame from mobile radio station to the base station with the data rate of selecting from a plurality of data rates on reverse packet data channel, send the reverse packet data frame by the reverse control information that on the forward direction rate control channel, sends to mobile radio station from the base station, and control the data rate of next reverse packet data frame then, described method comprises the steps: to retransmit the reverse packet data frame according to the affirmation from the base station, and whether this reception of confirming indication reverse packet data frame is successful; , receive about increase, minimizing or maintenance information for the reverse packet data frame that retransmits by the reverse control information of the data rate of mobile radio station by being used for the reverse packet data frame; And after receiving this increase, minimizing or maintenance information, to send next reverse packet data frame from the speed that selected data rate increases, reduces or keep and obtains in response to received increase, minimizing or maintenance information.

According to a further aspect in the invention, a kind of method that is used to control the data rate of next reverse packet data frame is provided in following mobile station system, this mobile station system is used for sending the reverse packet data frame from mobile radio station to the base station with the data rate of selecting from a plurality of data rates on reverse packet data channel, send the reverse packet data frame by the reverse control information that on the forward direction rate control channel, sends to mobile radio station from the base station, and control the data rate of next reverse packet data frame then, described method comprises the steps: to receive the reverse packet data frame that sends with selected data rate by the base station; And whether successfully come the reverse control information of the data rate by being used for the reverse packet data frame to send increase, minimizing or maintenance information according to the reception of this reverse packet data frame.

According to a further aspect in the invention, a kind of device that is used to control the data rate of next reverse packet data frame is provided in following mobile station system, this mobile station system is used for sending the reverse packet data frame from mobile radio station to the base station with the data rate of selecting from a plurality of data rates on reverse packet data channel, send the reverse packet data frame by the reverse control information that on the forward direction rate control channel, sends to mobile radio station from the base station, and control the data rate of next reverse packet data frame then, described device comprises: receiver is used for reception according to the reverse packet data frame and whether successfully comes to receive from the base station increase that comprises for the data rate of reverse packet data frame, reduce or keep the reverse control information of information; Controller is used for determining according to the received increase based on selected data rate, minimizing or maintenance information the data rate of next reverse packet data frame; And transmitter, be used for sending next reverse packet data frame to the base station according to determined data rate.

Description of drawings

From following detailed description and combination accompanying drawing, above-mentioned and other purpose of the present invention, feature and advantage will become clearer, in described accompanying drawing:

Fig. 1 is diagram is determined the operation of reverse rate by mobile radio station according to prior art a flow chart;

Fig. 2 is diagram is determined the operation of reverse rate by mobile radio station according to prior art a sequential chart;

Fig. 3 is the block diagram of device that be used to control reverse rate of diagram according to the embodiment of the invention;

Fig. 4 is that diagram is determined the flow chart of the operation of reverse rate according to the embodiment of the invention by mobile radio station;

Fig. 5 is that diagram is determined the sequential chart of the operation of reverse rate according to the embodiment of the invention for RCD=1 frame (perhaps 1 time interval) by mobile radio station;

Fig. 6 is that diagram is determined the sequential chart of the operation of reverse rate according to the embodiment of the invention for RCD=2 frame (perhaps 2 time intervals) by mobile radio station;

Fig. 7 illustrates the flow chart of the operation of the base station in the system that adopts HARQ technology and energy minimizing (energy reduction) technology in accordance with another embodiment of the present invention;

Fig. 8 illustrates the sequential chart of being determined the operation of reverse rate in accordance with another embodiment of the present invention in the system that adopts HARQ technology and energy minimizing technology by mobile radio station; And

Fig. 9 is the figure of method of TPR that is used to control each HARQ channel that is used to explain according to the embodiment of the invention.

Embodiment

Describe several preferred embodiments of the present invention below with reference to the accompanying drawings in detail.In the following description, omitted for simplicity's sake the known function that comprised here and the detailed description of configuration.

The present invention is directed to by using rate controlled bit (RCB) control reverse data rate, wherein mobile communication system is considered and is determined that the base station produces the reference moment of RCB and mobile radio station application RCB predetermined time of delay.Here, " time of delay " be called " rate controlled postpone (rate control delay, RCD) ".Also be expressed as rate controlled based on the rate controlled of RCD based on ACID (ARQ (Automatic Repeat reQuest, repetitive requests automatically) Channel Indicator, ARQ channel indicator).That is, in determining the data rate process of mobile radio station,, determine speed then corresponding to the transmission grouped data of same ACID to be fundamental analysis RCB corresponding to the speed of the grouped data of ACID formerly.

In addition, in fact the method for the data rate of control mobile radio station is equal to the method for the TPR that controls mobile radio station.Thereby, will only the method by the data rate of base stations control mobile radio station be described.But, the method for rate control that the method for control TPR also can be applied among the present invention to be proposed.

Fig. 3 is the block diagram of device that is used to control reverse rate that illustrates according to the embodiment of the invention.As shown in Figure 3, rate control device comprises forward direction rate control channel (forward rate control channel, F-RCCH) (reverse packet datachannel, R-PDCH) transmitter 30 for receiver 10, controller 20 and reverse packet data channel.For each time interval, F-RCCH receiver 10 is distributed to F-RCCH by use spreading code is carried out the signal that receives from the base station and is separated spread spectrum, demodulation, decoding and receive RCB, and provide the RCB that is received to controller 20.

Whether the value that controller 20 is analyzed RCB requires the increase of reverse rate or the minimizing of reverse rate with definite base station, and determines new reverse rate according to definite result.Then, R-PDCH transmitter 30 sends Frame according to determined data rate under the control of controller 20.Here, RCB be not by will being used for next time interval speed be used for formerly the speed in the time interval and mate the value of determining, but the speed by will being used for next time interval and be used for before current time interval, crossing the speed in the time interval of set rate control lag (RCD) and mate the value of determining.

More specifically, suppose that mobile radio station sends a Frame in each in time interval, then RCD be from moment of sending i frame when receiving and the delay during definite RCB based on i frame.When starting when intercoming mutually, base station and mobile radio station determine RCD by the agreement between base station and the mobile radio station.Perhaps, can determine RCD by mobile radio station.In another case, can determine that RCD notifies mobile radio station then by the base station.In another case, can between base station and mobile radio station, determine RCD in advance.

Therefore, in case receive i frame, the base station just produces RCB based on i the frame that receives, and sends the RCB that is produced on R-RCCH.Mobile radio station receives RCB, determines the speed of next frame and send next frame with determined speed according to the speed of i frame.

As mentioned above, also based on ACID control speed.Suppose that mobile radio station sent and the corresponding grouped data of ACID with 00,01,10,11 values in proper order 4 different time intervals.In this case, suppose that the speed corresponding to the current grouped data of ACID=00 is 19.2Kbps and receives RCB (+), then mobile radio station can send next grouped data corresponding to ACID=00 with 38.4Kbps.That is, in determining the rate process of current transmission grouped data, mobile radio station is based on determining that corresponding to the speed of the grouped data formerly of same ACID next sends the speed of grouped data.

Fig. 4 is that diagram is determined the flow chart of the operation of reverse rate according to the embodiment of the invention by mobile radio station.Mobile radio station is supported 9.6Kbps, 19.2Kbps, 38.4Kbps, 76.8Kbps, 153.6Kbps and 307.2Kbps at least for R-PDCH, and progressively increases, reduces or keep reverse rate according to rate controlled bit (RCB).

With reference to figure 4, in step 310, mobile radio station receives and analyzes rate controlled bit (RCB) n the time interval.In step 320, mobile radio station determines whether the value of RCB indicates " speed increase ".If the value of rate controlled bit is "+1 " of indication " speed increase ", then in step 330, the speed R (n+1) that mobile radio station will use in next time interval " n+1 " is set to increase than the speed R (n-RCD) in the time interval that occurs in the before predetermined RCD of current time interval the value (or speed) of a step-length, advances to step 370 then.This can express shown in following formula 1 like that.

R(n+1)＝R(n-RCD)++...........(1)

If determining the value of RCB in step 320 is not "+1 " of indication " speed increase ", then mobile radio station determines whether the value of RCB indicates " speed decline " in step 340.If determining the value of RCB is " 1 " of indication " speed decline ", then in step 350, the speed R (n+1) that mobile radio station will use in next time interval " n+1 " is set to reduce than the speed R (n-RCD) in the time interval that occurs in the before predetermined RCD of current time interval the value of a step-length, advances to step 370 then.This can express shown in following formula 2 like that.

R(n+1)＝R(n-RCD)--...........(2)

If determining the value of RCB in step 340 is not " 1 " of indication " speed decline ", then in step 360, the speed R (n+1) that mobile radio station will use in next time interval " n+1 " is set to the identical value of speed R (n-RCD) with the time interval that occurs in the before predetermined RCD of current time interval.This can express shown in following formula 3 like that.

R(n+1)＝R(n-RCD)...........(2)

In step 370, mobile radio station sends Frame according to determined speed R (n+1) in next time interval " n+1 ".

In the present invention, rate controlled postpones (RCD) and considers that processing delay in base station and the mobile radio station is when reverse required time during transmission one frame of mobile radio station.Thereafter, the base station forward direction sends RCB, and mobile radio station receives this RCB and the RCB that receives is applied to the data rate of next frame.RCB specifies by frame.For example, can RCB be set with a frame or two frames.

Fig. 5 illustrates to be determined the sequential chart of the operation of reverse rate according to the embodiment of the invention by mobile radio station for RCD=1 frame (or 1 time interval).With reference to figure 5, in time interval t0, mobile radio station sends Frame with speed 9.6Kbps (referring to 410) on PDCH.At time interval t1, the base station determines to increase, reduce or keep the data rate of mobile radio station based on the power rating of RoT, buffer state, mobile radio station, according to determining that the result produces RCB and sends the RCB (referring to 420) that is produced.

In time interval t1, receive RCB, and mobile radio station is according to the definite data rate that will use of the RCB that receives in time interval t2 at the mobile radio station place.In the process of the data rate of determining to use in time interval t2, mobile radio station is not based on the speed that is used for time interval t1 formerly and the speed that is based on the time interval t0 that is used to occur in a predetermined RCD before the current time interval or a frame is determined this data rate.Such rate controlled is called " staggered rate controlled (interlaced rate control) ", because rate controlled is carried out on odd-numbered frame and even frame dividually as shown in Figure 5.

For example, mobile radio station uses speed 9.6Kbps in time interval t1.The base station produces RCB (+) and sends the RCB (+) that is produced according to the definite definite result of speed, basis who increases mobile radio station of the state information of mobile radio station in time interval t1 arrives mobile radio station.In time interval t2, receive RCB (+) at the mobile radio station place, and based on the RCB (+) that receives, the speed that mobile radio station will use in time interval t3 is set to speed 19.2Kbps, it is than being used for time interval t1, and the speed 9.6Kbps that promptly occurs in the time interval of RCD before the current time interval increases a step-length.

As another example, mobile radio station uses speed 38.4Kbps in time interval t5.The base station produces RCB (+) and sends the RCB (+) that is produced according to the definite definite result of speed, basis who increases mobile radio station of the state information of mobile radio station in time interval t5 arrives mobile radio station.In time interval t6, receive RCB (+) at the mobile radio station place, and based on the RCB (+) that receives, the speed that mobile radio station will use in time interval t7 is set to speed 76.8Kbps, it is than being used for time interval t5, and the speed 38.4Kbps that promptly occurs in the time interval of RCD before the current time interval increases a step-length.

Fig. 6 is that diagram is determined the sequential chart of the operation of reverse rate according to the embodiment of the invention for RCD=2 frame (or 2 time intervals) by mobile radio station.With reference to figure 6, in time interval t0, mobile radio station sends Frame with speed 9.6Kbps (referring to 510) on PDCH.At time interval t1, the base station determines to increase, reduce or keep the data rate of mobile radio station based on the power rating of RoT, buffer state, mobile radio station, according to determining that the result produces RCB, and sends the RCB (referring to 520) that is produced.

In time interval t2, receive RCB, and mobile radio station is according to the definite data rate that will use of the RCB that receives in time interval t3 at the mobile radio station place.In the process of the data rate of determining to use in time interval t3, mobile radio station is not based on the speed that is used for time interval t2 formerly and the speed that is based on the time interval t0 that is used to occur in predetermined RCD before the current time interval or 2 frames is determined this data rate.

For example, mobile radio station uses speed 9.6Kbps in time interval t1.The base station produces RCB (+) and sends the RCB (+) that is produced according to the definite definite result of speed, basis who increases mobile radio station of the state information of mobile radio station in time interval t1 arrives mobile radio station.In time interval t3, receive RCB (+) at the mobile radio station place, and based on the RCB (+) that receives, the speed that mobile radio station will use in time interval t4 is set to speed 19.2Kbps, it is than being used for time interval t1, and the speed 9.6Kbps that promptly occurs in the time interval of RCD before the current time interval increases a step-length.

As another example, mobile radio station uses speed 38.4Kbps in time interval t5.The base station produces RCB (-) and sends the RCB (-) that is produced according to the definite definite result of speed, basis who reduces mobile radio station of the state information of mobile radio station in time interval t5 arrives mobile radio station.In time interval t7, receive RCB (-) at the mobile radio station place, and based on the RCB (-) that receives, the speed that mobile radio station will use in time interval t8 is set to speed 19.2Kbps, it is than being used for time interval t5, and the speed 38.4Kbps that promptly occurs in the time interval of RCD before the current time interval reduces a step-length.

In Fig. 5, because the RCD=1 frame, so on two parts (even frame and odd-numbered frame), separately carry out rate controlled.In Fig. 6, because the RCD=2 frame, so on three parts (first frame, second frame, the 3rd frame), separately carry out rate controlled.

In staggered method of rate control according to the present invention, mobile radio station employed speed when producing RCB when the base station is used the information that is used for increasing (+), reduce (-) or keeping (0) to RCB, thereby because the reverse rate that the delay between base station and the mobile radio station causes is controlled mistake can be eliminated.Thereby by using staggered method of rate control, mobile radio station accurately is applied in the speed that calculates during the base station scheduling, controls the reverse rate of mobile radio station thus effectively.

Be applied to use the operation of determining the reverse rate of mobile radio station in the system of energy minimizing technology in order to describe by the method for rate control that will interlock, be necessary at first to describe automatic repeat requests (HybridAutomatic Retransmission Request, the HARQ) technology of mixing.

The HARQ technology is often used in supporting increasing reverse throughput in the packet radio mobile communication system of multimedia service.The HARQ technology is the technology of carrying out on physical layer packet.This paper below will describe the operation of the reverse transmit frame that uses such HARQ technology.

Base station in response confirms by forward direction (acknowledgement, ACK) whether the channel notification mobile radio station successfully receives physical layer packet in receive physical layer packet from mobile radio station.If successfully receive physical layer packet, then the base station sends the ack signal of the successful reception of indication physical layer packet on ack channel.But, if the taking defeat of physical layer packet, then the base station on ack channel, send the indication physical layer packet take defeat do not confirm (negative acknowledgement, NAK) signal.The signal that the mobile radio station analysis receives on ack channel is to determine whether successfully to have sent physical layer packet.If receive ack signal, then mobile radio station sends new grouping, and if receive the NAK signal, then mobile radio station retransmits the previous grouping that sends.

If to the packet decoding failure that had before received from mobile radio station, then the base station grouping that will retransmit and packet assembling that had before received before attempting to decode is that the increase that is decoded into power is contributed thus.

In the system that uses the HARQ technology, use energy to reduce technology in order to determine the reverse rate mobile radio station.In energy minimizing technology, in mobile radio station is using the system of HARQ technology, carry out initialization after in case receive the NAK signal from the base station when attempting to retransmit, the energy of retransmission packet is set to the value less than the energy of the grouping of initialization.That is, in this technology, the Traffic Channel that is used for retransmission packet has the gain lower than the grouping of initialization.

Fig. 7 is the flow chart that illustrates according to the operation of base station in the system that adopts HARQ technology and energy minimizing technology of the embodiment of the invention.Fig. 8 illustrates the sequential chart of being determined the operation of reverse rate in accordance with another embodiment of the present invention in the system that adopts HARQ technology and energy minimizing technology by the base station.In Fig. 8, the height of Packet Data Channel is represented channel gain.

With reference to figure 7 and Fig. 8, if mobile radio station sends grouping at time interval t0 on PDCH, then in step 700, the base station receives the grouping that is sent by mobile radio station and attempts demodulation is carried out in the grouping that receives on the PDCH channel.In step 710, the base station determines whether the demodulation of grouping is successful.If determine the demodulation success, then in step 715, the base station on ack channel, send ack signal to mobile radio station so that receive next grouping.Simultaneously, and base station transmission RCB or service pilot ratio control bit (traffic-to-pilot ratio control bit, TPRCB).

But if determine the demodulation failure, then in step 720, the base station sends NAK signal 701 to mobile radio station on ack channel.At this moment, the base station does not send RCB 702, thereby this is because the data rate that is used for retransmission packet is not that to be different from the data rate TPR control that is used for initial transmission packet be unnecessary.

In case receive NAK signal 701, mobile radio station is just attempted to retransmit at time interval t2.At this moment, as shown in Figure 8, to the grouping applied energy minimizing technology that on PDCH, retransmits at time interval t2.Thereby, do not receive RCB702, and retransmission packet is lower than the grouping in time interval t0 initialization on energy from the base station.The transmission energy of retransmission packet is compared with the transmission energy of the grouping of initialization can reduce to 1/2 or 1/4.

In step 730, the base station is received in the grouping that time interval t2 retransmits at PDCH from mobile radio station.In step 740, the initial transmission packet that the base station will receive at time interval t0, promptly the time interval of two RCD receives grouping before occurring in current time interval, carries out demodulation with the packet assembling of current re-transmission and to the grouping after the combination.Thereafter, in step 750, the base station determines whether successfully to have realized demodulation.Failed if determine demodulation, then the base station sends the NAK signal in step 755, turns back to step 730 then to receive retransmission packet.

Explain that for convenient in Fig. 7, the base station continues to wait for retransmission packet when the base station sends the NAK signal in step 755.But in fact, the base station stops to retransmit when outnumbering of re-transmission is scheduled to number of retransmission.Preferably, the predetermined number of retransmission that comprises initialization is set to 3 or lower.

If determine re-transmission is grouped into the merit demodulation in step 750, then in step 760, although do not illustrate among Fig. 8, the base station sends ack signal at time interval t2 and has successfully received grouping with the notice mobile radio station.Simultaneously, the base station sends RCB 702 so that the speed or the TPR of control mobile radio station.

Now will be to being described in the operation of adopting HARQ technology and energy to reduce in the system of technology by mobile radio station control reverse rate or TPR.Should be noted that this operates in is equal to the operation relevant with Fig. 5 and Fig. 6 on the principle.

Turn back with reference to figure 8, in case receive RCB 702, mobile radio station is determined to increase, reduced according to the order of RCB 702 still is to keep data rate or TPR.Mobile radio station is based on the information for the speed increases/decline/maintenance of the grouping that sends at time interval t2, and control will be at the speed or the TPR of the grouping of time interval t4 transmission.Because RCD is corresponding to two time intervals as shown in Figure 5, mobile radio station is followed the operation described about Fig. 5.Thereby, for the sake of simplicity omitted detailed description.In this case, the operation by mobile radio station control reverse rate is equal to the operation described about Fig. 4.

But in a kind of substituting method, mobile radio station can will be at the speed or the TPR of the grouping of time interval t4 transmission based on controlling for the information of the increase/declines/maintenance of the grouping that sends at time interval t0.Here, when mobile radio station based on controlling for the information of the increase/declines/maintenance of the grouping that sends at time interval t0 will be at the speed of the grouping of time interval t4 transmission or TPR the time, such operation should not violated the operating principle about Fig. 5 and the described embodiment of Fig. 6.More specifically, because used energy minimizing technology,, but has identical speed at time interval t0 with the grouping that t2 sends by mobile radio station so the gain of each Packet Data Channel is configured to different values.Thereby, based on the speed of the grouping that sends at time interval t0, be increased in the speed of time interval t4 according to RCB (+) 702.

In the system that does not adopt energy minimizing technology, the method that mobile radio station proposes based on the present invention always increases, reduces or keeps speed based on the grouping of the time interval transmission of RCD before occurring in current time interval.

In addition, although the base station sends TPRCB, but the speed that mobile radio station does not cause based on the TPR during the re-transmission of time interval t2 increases, reduces or keep the speed of the current grouping that will send and be based on the speed that the TPR during the initialization of time interval t0 causes.

Can express like that shown in 4 as the following formula and be used for by using ACID to send the method for current grouped data frame.

Fig. 9 is the figure of method of TPR that is used to control each HARQ channel that is used to explain according to the embodiment of the invention.

In common HARQ operation, (ARQ Channel Identifier ACID) identifies with the ARQ Channel Identifier several HARQ channels and each HARQ channel.For example, if there are 4 HARQ channels, these HARQ channels are carried out the HARQ operation respectively corresponding to ACID=0, ACID=1, ACID=2, ACID=3 independently to each ACID.Though this specification is described as different channels by separating each ACID with the HARQ channel, the HARQ channel can be each different frame of a Packet Data Channel.

For better understanding, this paper below will describe the operation of the conventional H ARQ system that uses the 10ms frame length in detail.

Mobile radio station sends initial transmission packet in the specific zero-time t=0 beginning on a series of HARQ channels.That is, at t=0, mobile radio station sends the initial transmission packet data on as the HARQ channel of the ACID=0 of a HARQ channel.At t=10ms, mobile radio station sends the initial transmission packet data on as the HARQ channel of the ACID=1 of the 2nd HARQ channel.At t=20ms, mobile radio station sends the initial transmission packet data on as the HARQ channel of the ACID=2 of the 3rd HARQ channel.At t=30ms, mobile radio station sends the initial transmission packet data on as the HARQ channel of the ACID=3 of the 4th HARQ channel.

Mobile radio station receives ACK or the NAK in response to the initial transmission packet that sends at the HARQ of ACID=0 channel from the base station, and if receive NAK, then mobile radio station is carried out by the HARQ channel of ACID=0 at t=40ms and is retransmitted.If from the NAK of base station reception in response to the initial transmission packet that sends at the HARQ of ACID=1 channel, then mobile radio station is carried out by the HARQ channel of ACID=1 at t=50ms and is retransmitted.

As mentioned above, use several HARQ channels to carry out common HARQ operation.The staggered method of rate control that proposes among the present invention is equal in the HARQ operation for each HARQ channel or the speed of ACID control mobile radio station or the TPR of mobile radio station.

Because in the HARQ operation, use time period corresponding to the HARQ interchannel of identical ACID to define rate controlled and postpone (RCD), so to be equal to the speed that occurs in the time interval of RCD before the current time interval according to rate controlled bit (RCB) control that receives corresponding to the HARQ channel control speed of identical ACID or TPR.

Fig. 9 illustrates the process of the TPR that is used to control each HARQ channel or ACID as mentioned above.For example, in Fig. 9, the number of HARQ channel is 4.Thereby, as shown in Figure 9, ACID=0,1,2 and 3.For convenience of explanation, in the example of Fig. 9, omitted the response signal that is used to support HARQ such as ACK or NAK.Although used ACK or NAK signal, except send the rate controlled of execution graph 9 operation in the same way the retransmission packet in response to NAK.

In order to carry out the TPR control operation for each HARQ channel or ACID, as described about Fig. 9, mobile radio station can use inner parameter authorized_tpr.Authorized_tpr is meant by mobile station management to upgrade its maximum TPR value of being permitted by the base station so that control the parameter of himself speed, and it is that each ACID upgrades.Thereby in this example, it is 4 arrangement (arrangement) that authorized_tpr becomes size, is authorized_tpr[4].Here, authorized_tpr[0] be used for TPR control to the mobile radio station of the HARQ channel of ACID=0; Authorized_tpr[1] be used for TPR control to the mobile radio station of the HARQ channel of ACID=1; Authorized_tpr[2] be used for TPR control to the mobile radio station of the HARQ channel of ACID=2; And authorized_tpr[3] be used for TPR control to the mobile radio station of the HARQ channel of ACID=3.

In Fig. 9, a series of TPRCB that label 901 expressions send from the base station to the mobile radio station, a series of R-PDCH that label 902 expressions are oppositely sent by mobile radio station.In addition, numeral 19.2 and 38.4 expressions are the data rate of unit with Kbps.In addition, in Fig. 9, label 903 expressions are the identifier of the effluxion of unit with 10ms, and label 904 expressions are as the ACID of the identifier of each HARQ channel.

With reference to figure 9 in detail, the operation of base station and mobile radio station will be described.

Mobile radio station sends the grouping of 19.2Kbps on the HARQ of ACID=0 channel at t=t0.At this moment, mobile radio station authorized_tpr[0] value be set to TPR value corresponding to 19.2Kbps.Mobile radio station sends the grouping of 38.4Kbps on the HARQ of ACID=1 channel at t=t1.At this moment, mobile radio station authorized_tpr[1] value be set to TPR value corresponding to 38.4Kbps.Mobile radio station sends the grouping of 38.4Kbps on the HARQ of ACID=2 channel at t=t2.At this moment, mobile radio station authorized_tpr[2] value be set to TPR value corresponding to 38.4Kbps.In addition, mobile radio station receives the TPRCB of indication " increase " from the base station at t=t2.

Thereby mobile radio station is with authorized_tpr[0] value be updated to TPR value corresponding to 38.4Kbps.Because mobile radio station sends the TPRCB that the grouping of 19.2Kbps receives the indication " increase " in response to this then on the HARQ of ACID=0 channel, so mobile radio station will be corresponding to the authorized_tpr[0 of identical ACID] increase a step-length.

Mobile radio station sends the grouping of 76.8Kbps on the HARQ of ACID=3 channel at t=t3.At this moment, mobile radio station authorized_tpr[3] value be set to TPR value corresponding to 76.8Kbps.

In addition, mobile radio station receives the TPRCB of indication " increase " from the base station at t=t3.Thereby mobile radio station is with authorized_tpr[1] value be updated to TPR value corresponding to 76.8Kbps.Because mobile radio station sends the TPRCB that the grouping of 38.4Kbps receives the indication " increase " in response to this then on the HARQ of ACID=1 channel, so mobile radio station will be corresponding to the authorized_tpr[1 of identical ACID] increase a step-length.

Will be in the process of the speed of the grouping that t=t4 sends on the HARQ of ACID=0 channel or TPR, in control because authorized_tpr[0] value be value corresponding to 38.4Kbps, so mobile radio station can send the grouping of 38.4Kbps.In the example of Fig. 9, mobile radio station sends the grouping of 38.4Kbps.Repeat such operation continuously.As mentioned above, mobile radio station is controlled the TPR of each HARQ channel or ACID.In addition, as shown in this example, mobile radio station can be controlled himself TPR value for each HARQ channel by using inner parameter authorized_tpr.

Among a plurality of previous transmission packet data frames, there is current transmission packet data frame, and has the speed of respective packets Frame corresponding to identical ACID.As mentioned above, the speed of packet data frame can be used in the same expression formula of TPRCB in.Here, formerly sending TPRCB that the speed of packet data frame permits will be with TPRCB{ACID (P) } expression, wherein P representative " formerly ".

In addition, the next speed that sends packet data frame will be with TPRCB{ACID (N) } expression, wherein N represents " next one ".Mobile radio station is determined to increase, reduced based on the control information that receives from the base station still is maintenance speed.

Aforementioned description can be expressed shown in 4 as the following formula like that.

TPRCB{ACID(N)}＝TPRCB{ACID(P)}+Delta ........(4)

That is, corresponding to the speed of the packet data frame of identical ACID the speed of current transmission grouped data is increased or reduces Delta among the packet data frame based on formerly sending.Here " value " that " Delta " expression increases or reduces based on the control information that receives from the base station.

As from aforesaid description as can be known, mobile radio station is used RCB based on employed speed when the base station produces RCB, prevents thus because the reverse rate departure that processing delay caused between base station and the mobile radio station.Thereby, using according to staggered method of rate control of the present invention, mobile radio station accurately is applied in the speed that calculates during the base station scheduling, controls the reverse rate of mobile radio station thus effectively.

Though illustrate and described the present invention with reference to some preferred embodiment of the present invention, it should be appreciated by those skilled in the art that and to carry out the various modifications on form and the details and do not deviate from the defined the spirit and scope of the present invention of claims.

Claims (11)

1. method that is used in the through-put power of the mobile radio station of mobile communication system control up link, described method comprises:

In first transmission intercal, send uplink data; And

Receive transmission power control information by downlink control channel;

Determine the through-put power of the uplink data that will send in second transmission intercal, described through-put power is based on that the through-put power of transmission power control information that is received and the uplink data that sends determines in first transmission intercal,

Wherein, described first transmission intercal and second transmission intercal are included in the automatic repeat requests of same mixing (HARQ) process.

2. the method for claim 1 also comprises according to determined through-put power sending uplink data in second transmission intercal.

3. the method for claim 1 also comprises and analyzes received transmission power control information.

4. method as claimed in claim 3 wherein, is analyzed the transmission power control information that is received and is comprised that definite transmission power control information that receives is that indication increases through-put power or indication reduces through-put power.

5. the transmission intercal of the method for claim 1, wherein same HARQ process has identical automatic repetitive requests (ARQ) channel indicator (ACID).

6. method as claimed in claim 5, wherein, the through-put power of the uplink data that send in second transmission intercal is by TPRCB{ACID (N) }=TPRCB{ACID (P) }+Delta is definite,

Wherein, TPRCB{ACID (P) }: with the through-put power corresponding service pilot tone ratio control bit (TPRCB) of the uplink data that will in second transmission intercal, send;

TPRCB{ACID (N) }: corresponding with the through-put power of the uplink data that in first transmission intercal, sends TPRCB; And

Delta: indication increases or reduces the value of through-put power according to transmission power control information.

7. device that is used in the through-put power of the mobile radio station of mobile communication system control up link comprises:

Receiver is used for receiving transmission power control information on downlink control channel;

Controller is used for determining according to the through-put power of transmission power control information that is received and the uplink data that before sent in the automatic repeat requests of same mixing (HARQ) process the through-put power of the uplink data that will send; And

Transmitter is used for sending uplink data according to the through-put power of being determined by described controller.

8. device as claimed in claim 7, wherein, described controller is analyzed received transmission power control information.

9. device as claimed in claim 8, wherein, described controller determines that the transmission power control information that is received is that indication increases through-put power or indication reduces through-put power.

10. device as claimed in claim 7, wherein, described uplink data is drawn together identical automatic repetitive requests (ARQ) channel indicator (ACID) with the previous uplink data packet that sends.

11. device as claimed in claim 10, wherein, described controller is according to TPRCB{ACID (N) }=TPRCB{ACID (P) }+Delta determines the through-put power of the uplink data that will send,

Wherein, TPRCB{ACID (P) }: with the through-put power corresponding service pilot tone ratio control bit (TPRCB) of the uplink data that will in second transmission intercal, send;

TPRCB{ACID (N) }: corresponding with the through-put power of the uplink data that in first transmission intercal, sends TPRCB; And

Delta: indication increases or reduces the value of through-put power according to transmission power control information.

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