CN1951138A - Radio base station apparatus and transmission rate notifying method - Google Patents

Radio base station apparatus and transmission rate notifying method Download PDF

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Publication number
CN1951138A
CN1951138A CNA2005800139583A CN200580013958A CN1951138A CN 1951138 A CN1951138 A CN 1951138A CN A2005800139583 A CNA2005800139583 A CN A2005800139583A CN 200580013958 A CN200580013958 A CN 200580013958A CN 1951138 A CN1951138 A CN 1951138A
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transfer rate
communication terminal
candidate
information
base station
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CNA2005800139583A
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CN1951138B (en
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伊大知仁
铃木秀俊
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Abstract

A radio base station apparatus wherein the consumption of transmission power resources in a high-rate packet transmission can be suppressed. In the apparatus, a scheduling part (31) limits the candidates of an upstream line packet transmission rate to some of a plurality of transmission rates indicated by transmission rate combination information, selects an upstream line packet transmission rate from among the limited transmission rate candidates, and creates scheduling result information including transmission rate information indicative of the selected transmission rate. The scheduling result information is wireless transmitted from an antenna (108) to a communication terminal that is permitted to transmit upstream line packets.

Description

Radio base station apparatus and transmission rate notifying method
Technical field
The present invention relates to a kind of radio base station apparatus and transmission rate notifying method.
Background technology
In the past, for carrying out the high-speed packet transmission manner at the downgoing line from the radio base station apparatus to the communication terminal, for example HSPDA (High Speed Downlink Packet Access) has carried out various discussions and research.Follow this, also need to make big capacity or the low transfer of data that postpones to become possible expansion, in 3GPP, carrying out the relevant Standardization Research Work of transmitting in the high-speed packet of uplink at present in the uplink from the communication terminal to the wireless base station.
In the transmission of the high-speed packet of uplink, with downgoing line similarly, the introducing of dispatching technique is studied.Carry out the uplink packet scheduling in the base station, the base station sends to each communication terminal with the schedule information that generates.Each communication terminal sends to the base station based on the schedule information that receives from the base station with the uplink grouping.And, in the scheduling of base station, select to allow send the communication terminal of uplink grouping, to selected communication terminal, the messaging parameter of transfer rate that allows with the control signal transmission of downgoing line and transmitted power etc.
As one of dispatching method in the high-speed packet transmission of uplink, the method (with reference to non-patent literature 1) that is called as Time andRate Scheduling is arranged.This Time and Rate Schedulin is made up of three following steps.That is, at first step, communication terminal is to base station notice request transfer rate, data volume, transmitted power allowance etc.Then in second step, dispatch based on notified request transfer rate, data volume, transmitted power allowance etc. the base station, select to allow to send the communication terminal of uplink grouping, to selected communication terminal, the messaging parameter of transfer rate that allows with the indication of the control signal of downgoing line and transmitted power etc.Then at third step, receive the communication terminal of the control signal that mails to self terminal, send the uplink grouping with the transmitted power below the transmitted power of transfer rate below the transfer rate of base station indication and base station indication.
At this, as the transfer rate that can be used in the high-speed packet transmission of uplink, 32 kinds MCS (Modulation and Coding Scheme) has been proposed in " 3GPP, R1-030667, HARQ Efficiency in E-DPDCH " (non-patent literature 2).And, propose in " 3GPP, R1-031232, TextProposal on DL Signaling Overhead " (non-patent literature 3) relevant when in Time andRate Scheduling, using these MCS, in the transmission of the control signal of downgoing line.In described non-patent literature 3, " 5-bit reconfiguration pointer " conduct " E-DCH TFCSreconfiguration (i.e.scheduling Grant for Time-and-Rate scheduling) " is proposed.Because 5 bits can be expressed 32 kinds of patterns, therefore, in described non-patent literature 3, propose to prepare 32 kinds control signal in advance, this control signal of 32 kinds can be indicated whole 32 kinds MCS to communication terminal.
[non-patent literature 1] 3GPP, R1-030592, Node B Controlled Time and RateScheduling
[non-patent literature 2] 3GPP, R1-030667, HARQ Efficiency in E-DPDCH
[non-patent literature 3] 3GPP, R1-031232, Text Proposal on DL Signaling Overhead
Summary of the invention
Yet as above-mentioned, if prepare to represent to be used in the control signal of all transfer rates of the high-speed packet transmission of uplink, the bit number of control signal can increase.For example, as above-mentioned, when preparation can be indicated 32 kinds of control signals of all MCS of 32 kinds to communication terminal, the bit number of control signal needed 5 bits.So shown in figure 32, when the bit number of control signal increased, for satisfying the required quality of reception (error rate) of control signal at communication terminal, becoming needed to increase the transmitted power of control signal.
For example, carry out the high-speed packet transmission of uplink at the same time and in the high-speed packet transmission wireless communication system of downgoing line, exert an influence with the bit number of downgoing line control signals transmitted transmitted power to the downgoing line grouping.That is to say, as shown in figure 33, because the transmitted power resource of downgoing line has the upper limit, the bit number of the control signal of downgoing line is increased to the words (N＜M) of M bit from the N bit, the transmitted power of the control signal of downgoing line correspondingly increases, and the transmitted power resource that can be used for the downgoing line grouping is correspondingly reduced, its result, generation can not be to the sufficient transmitted power resource of downgoing line packet allocation, and causes the quality of downgoing line grouping to reduce and the problem of the reduction of transmission speed.
In addition, as shown in figure 34, transmitted power resource at downgoing line has allowance, even the bit number of the control signal of downgoing line is increased to the M bit from the N bit, in the time of also can be to the sufficient transmitted power of downgoing line packet allocation, increase by the transmitted power that increase caused of the bit number of the control signal of downgoing line causes total transmitted power of base station to increase, and therefore can produce the problem that the interference to other sub-districts increases.
Yet such problem is not limited to the situation at the downgoing line transmission of control signals, also same problem can take place in the situation of uplink transmission control signal.
For example, will be when the messaging parameters such as data length of the grouping of uplink transmission be notified the base station from communication terminal, for example when having prepared to notify 32 kinds of all data lengths of 32 kinds control signal to the base station, need 5 bits at the bit number of the control signal of uplink transmission.So with similarly above-mentioned, the bit number of control signal increases,, need to increase the transmitted power of control signal for satisfying the required quality of reception (error rate) of control signal in the base station.Therefore,, also can produce in uplink and to cause dividing into groups the reduction of quality and the reduction of transmission speed with similarly above-mentioned, and the problem that the interference of other sub-districts is increased.
As above-mentioned, be used for the increase of bit number of the control signal of informed about communication parameters, all can have problems at downgoing line and uplink both sides.
The object of the present invention is to provide a kind of radio base station apparatus and transmission rate notifying method that can suppress the consumption of transmitted power resource.
Radio base station apparatus of the present invention is the radio base station apparatus of selecting any one transfer rate and notify the communication terminal that allows the grouping of transmission uplink from a plurality of transfer rates, the structure that is adopted comprises: limit the unit, the candidate of selectable transfer rate is defined as the part of described a plurality of transfer rates; Selected cell is selected described uplink transmission packets rate from the candidate of the described transfer rate that limited; And transmitting element, the transfer rate information wireless of representing selected transfer rate is sent to described communication terminal.
According to the present invention, can suppress to increase the consumption of the transmitted power resource that causes because of the transmitted power of control signal.
Description of drawings
Fig. 1 is the block diagram of structure of the radio base station apparatus of expression embodiment of the present invention 1.
Fig. 2 is the block diagram of structure of the communication terminal of expression embodiment of the present invention 1.
Fig. 3 is the block diagram of structure of the scheduling unit of expression embodiment of the present invention 1.
Fig. 4 is the transfer rate combined information of embodiment of the present invention 1.
Fig. 5 is the action specification figure of the scheduling unit of embodiment of the present invention 1.
Fig. 6 is the action specification figure of the scheduling unit of embodiment of the present invention 2.
Fig. 7 A is the key diagram of the dispatching method of embodiment of the present invention 3.
Fig. 7 B is the key diagram of the dispatching method of embodiment of the present invention 3.
Fig. 7 C is the key diagram of the dispatching method of embodiment of the present invention 3.
Fig. 8 is the action specification figure of the scheduling unit of embodiment of the present invention 3.
Fig. 9 is the block diagram of structure of the scheduling unit of expression embodiment of the present invention 4.
Figure 10 is the action specification figure of the scheduling unit of embodiment of the present invention 4.
Figure 11 is the action specification figure of the scheduling unit of embodiment of the present invention 4.
Figure 12 is the block diagram of structure of the scheduling unit of expression embodiment of the present invention 5.
Figure 13 is the action specification figure of the scheduling unit of embodiment of the present invention 5.
Figure 14 is the block diagram of structure of the scheduling unit of expression embodiment of the present invention 6.
Figure 15 is the action specification figure of the scheduling unit of embodiment of the present invention 6.
Figure 16 is the action specification figure of the scheduling unit of embodiment of the present invention 6.
Figure 17 is the action specification figure of the scheduling unit of embodiment of the present invention 6.
Figure 18 is the block diagram of structure of the communication terminal of expression embodiment of the present invention 7.
Figure 19 is the block diagram of structure of the transfer rate selected cell of expression embodiment of the present invention 7.
Figure 20 is the transfer rate combined information of embodiment of the present invention 7.
Figure 21 is the action specification figure of the transfer rate selected cell of embodiment of the present invention 7.
Figure 22 is the action specification figure of the transfer rate selected cell of embodiment of the present invention 7.
Figure 23 is the block diagram of structure of the transfer rate selected cell of expression embodiment of the present invention 8.
Figure 24 is the action specification figure of the transfer rate selected cell of embodiment of the present invention 8.
Figure 25 is the action specification figure of the transfer rate selected cell of embodiment of the present invention 8.
Figure 26 is the block diagram of structure of the transfer rate selected cell of expression embodiment of the present invention 9.
Figure 27 is the action specification figure of the transfer rate selected cell of embodiment of the present invention 9.
Figure 28 is the action specification figure of the transfer rate selected cell of embodiment of the present invention 9.
Figure 29 is the action specification figure of the transfer rate selected cell of embodiment of the present invention 9.
Figure 30 is the action specification figure of the transfer rate selected cell of embodiment of the present invention 9.
Figure 31 is the action specification figure of the transfer rate selected cell of embodiment of the present invention 9.
Figure 32 is the figure of the relation of expression bit number and transmitted power.
Figure 33 is the figure of the transmitted power resource of expression downgoing line.
Figure 34 is the figure of the transmitted power resource of expression downgoing line.
Embodiment
Below, the execution mode that present invention will be described in detail with reference to the accompanying.
(execution mode 1)
Fig. 1 is the block diagram of structure of the radio base station apparatus of expression embodiment of the present invention 1.
Radio base station apparatus shown in Figure 1 has the dedicated channel signal of the communication terminal that communicates to form unit 101-1～101-N, has control signal to form unit 110 and 120 simultaneously.
Dedicated channel signal formation unit 101-1～101-N distributes to each communication terminal by use spreading code carries out spread spectrum to the transmission data that mail to each communication terminal, thereby forms the dedicated channel signal that mails to each communication terminal.
On the other hand, control signal forms unit 110 and 120 and uses the common spreading code of each communication terminal in the sub-district, spread spectrum is carried out in the control information of mailing to each communication terminal when each communication terminal is carried out the transmission of uplink grouping, thereby forms control signal.
It is identical that each dedicated channel signal forms the processing of unit 101-1～101-N, only illustrates here that therefore a dedicated channel signal forms the structure of unit 101-1.Dedicated channel signal forms unit 101-1 and is undertaken multiplexing by the 102 pairs of pilot signals in chnnel coding unit (PILOT), transmission data and upstream circuit power control command (UL-TPC).And before multiplexing, impose the error correction coding processing to sending data.After the modulated unit 103 of signal after multiplexing imposes modulation treatment, be output to spectrum-spreading unit 104.
Spectrum-spreading unit 104 uses communication terminal other spreading code that modulation signal is carried out spread processing.That is to say that each dedicated channel signal forms unit 101-1～101-N and uses different spreading codes to carry out spread processing respectively.Signal after the spread processing is sent to amplifying unit 105.Amplifying unit 105 with the power amplification of spread-spectrum signal, outputs to transmission radio-cell 107 with the signal after amplifying according to the transmitting power control signal from transmission power control unit 106.
Thus, form each communication terminal other dedicated channel signal that unit 101-1～101-N output uses different spreading codes to form respectively from each dedicated channel signal.Dedicated channel signal is sent out by antenna 108 after imposing the wireless processing of regulations such as digitaltoanalogconversion and up-conversion by transmission radio-cell 107.
On the other hand, control signal forms unit 110 and will be input to chnnel coding unit 111 by the ACK/NACK that mails to each communication terminal that error detection occurs unit 28 obtains.Chnnel coding unit 111 and each communication terminal between the position that is predetermined the ACK/NACK that mails to each communication terminal is carried out time division multiplexing.After imposing modulation treatment from the modulated unit 112 of the output of chnnel coding unit 111, be output to spectrum-spreading unit 113.
Spectrum-spreading unit 113 use all communication terminals in the communication shared spreading code modulation signal is carried out spread spectrum.Signal after the spread processing is sent to amplifying unit 114.Amplifying unit 114 with the power amplification of spread-spectrum signal, outputs to transmission radio-cell 107 with the signal after amplifying according to the transmitting power control signal from transmission power determining unit 115.
And control signal forms unit 120 will be input to chnnel coding unit 121 by the scheduling result information that mails to each communication terminal that scheduling unit 31 obtains.The scheduling result information that chnnel coding unit 121 will mail to each communication terminal and each communication terminal between the position that is predetermined carry out time division multiplexing.After imposing modulation treatment from the modulated unit 122 of the output of chnnel coding unit 121, be output to spectrum-spreading unit 123.
Spectrum-spreading unit 123 use all communication terminals in the communication common spreading code modulation signal is carried out spread spectrum.Signal after the spread processing is sent to amplifying unit 124.Amplifying unit 124 with the power amplification of spread-spectrum signal, outputs to transmission radio-cell 107 with the signal after amplifying according to the transmitting power control signal from transmission power determining unit 125.
Thus, form unit 110 and 120 output control signals from control signal, this control signal is: with the timing of communication terminal decision, time division multiplexing is carried out in control information (being ACK/NACK and scheduling result information in the present embodiment) when each communication terminal use dedicated channel is carried out the transmission of uplink grouping, and use the control signal of carrying out spread spectrum at the shared spreading code of each communication terminal.After this control signal is sent out radio-cell 107 and imposes predetermined wireless processing such as digitaltoanalogconversion and up-conversion, be sent out by antenna 108.Yet, describe though carry out time-multiplexed example with the control information (being ACK/NACK and scheduling result information in the present embodiment) when the timing with communication terminal decision sends carrying out the uplink grouping here, also can on a spreading code, further distribute definite signal (signature) of quadrature to wait and carry out code reuse.And the example with the shared spreading code of a plurality of communication terminals describes here, also can use a plurality of spreading codes at a plurality of communication terminals.
In addition, in radio base station apparatus shown in Figure 1, the signal that antenna 108 receives is imported into and receives radio-cell 20.Receive radio-cell 20 and obtain baseband signal, and send it to reception processing unit 21-1～21-N of the several N that are arranged to be equivalent to communication terminal by the wireless processing of carrying out regulations such as down-conversion and analog-to-digital conversion to received signal.Each processing that receives processing unit 21-1～21-N is identical, and therefore a structure that receives processing unit 21-1 only is described here.
Despread unit 22 is handled by using the spreading code corresponding with communication terminal that receiving baseband signal is carried out despreading, thereby takes out the dedicated channel signal that sends from communication terminal, and outputs to demodulating unit 23.And 22 pairs of pilot frequency code elements of despread unit carry out despreading, and the result is outputed to SIR determination unit 29.
The output signal of 23 pairs of despread unit 22 of demodulating unit is carried out demodulation process, and restituted signal is outputed to channel-decoding unit 24.The output signal of the 24 pairs of demodulating units 23 in channel-decoding unit is carried out decoding processing such as error correction decoding, the transmission power control commands (DL-TPC) that taking-up reception data, downgoing line are used etc.Illustrate one in passing, the reception data are sent to the control station as the host station of base station, and DL-TPC is sent to transmission power control unit 106.
The centrifugal pump of the pilot frequency code element of SIR determination unit 29 after the despreading is calculated disturbing wave power, and the ratio (SIR) of calculation expectation wave power and disturbing wave power, and the information of expression SIR is outputed to TPC generation unit 30 and scheduling unit 31.TPC generation unit 30 is based on the reception SIR of uplink and the magnitude relationship between the target SIR, the transmission power control commands (UL-TPC) that generation is used to indicate the uplink of increase and decrease of the transmitted power of uplink to use outputs to chnnel coding unit 102 with this UL-TPC.
Scheduling unit 31 is based on the received power resource of the usefulness of dividing into groups from transfer rate solicited message, SIR, transfer rate combined information, the uplink of each communication terminal, decide the communication terminal that allow to send the uplink grouping, and the MCS (transfer rate) when dispatching the transmission that decides this uplink grouping.Then, the scheduling result information of information (transfer rate information) formation of scheduling unit 31 transfer rate that will be determined by the information (end message) and the expression of the communication terminal that determined of expression outputs to chnnel coding unit 121.In addition, in the present embodiment, scheduling unit 31 carries out Time and RateScheduling.
The spread spectrum rate identical spread spectrum rate of despread unit 25 when with communication terminal spread spectrum is carried out in uplink grouping carried out despreading to receiving baseband signal and handled.Have again, communication terminal embeds the spread spectrum rate of this uplink grouping and information such as order of modulation, encoding rate in the signals and sends, radio base station apparatus shown in Figure 1 for example is configured to extract and is embedded into the above-mentioned information that receives in the data, and notifies despread unit 25, demodulating unit 26, channel-decoding unit 27.That is to say that the structure of despread unit 25, demodulating unit 26 and channel-decoding unit 27 is spread spectrum rate, order of modulation and encoding rate to be changed according to the transmission parameter information from communication terminal.
Demodulation process is carried out in 26 pairs of uplink groupings from despread unit 25 outputs of demodulating unit, and restituted signal is outputed to channel-decoding unit 27.The 27 pairs of restituted signals in channel-decoding unit carry out decoding processing such as error correction decoding, take out to receive grouping and it is outputed to error detection occurs unit 28.And channel-decoding unit 27 extracts the transfer rate solicited message, is sent to scheduling unit 31.
Error detection occurs unit 28 butt joint contracture groups are carried out error detection occurs.When not detecting mistake, error detection occurs unit 28 will receive the control station that divides into groups to output to as the host station of base station, and the ack signal that will mean correctly demodulation is simultaneously delivered to chnnel coding unit 111.On the other hand, when detecting mistake, error detection occurs unit 28 will mean the NACK signal of correctly demodulation and deliver to chnnel coding unit 111.
Then, the communication terminal that communicates with radio base station apparatus shown in Figure 1 is described.Fig. 2 is the block diagram of structure of the communication terminal of expression embodiment of the present invention 1.
Receiving system at first is described.Communication terminal shown in Figure 2 will receive radio-cell 42 by the signal input that antenna 41 receives.Receive radio-cell 42 and carry out down-conversion and analog-to-digital conversion processing to received signal, obtain receiving baseband signal thus, it is outputed to despread unit 43,48 and 51.
Despread unit 43 is handled by using this communication terminal other spreading code to carry out despreading, obtains to mail to the signal of this device.Despread signal is carried out demodulation process and decoding processing successively by demodulating unit 44 and channel-decoding unit 45, obtains to receive data and upstream circuit power control command (UL-TPC) thus.And despread signal is imported SIR determination unit 46 and TPC generation unit 47 successively, obtains downgoing line transmission power control commands (DL-TPC) from TPC generation unit 47 thus.
Despread unit 48 is used the shared spreading code of each communication terminal in the sub-district, to carrying out despreading from the receiving baseband signal that receives radio-cell 42 outputs, extracts control signal thus.By after demodulating unit 49 demodulation, be imported into channel-decoding unit 50 from the despread signal of despread unit 48 output.Channel-decoding unit 50 by time division multiplexing in the ACK/NACK that mails to each communication terminal of control signal, extract the ACK/NACK that mails to self terminal.Communication terminal is controlled the repeating transmission of uplink grouping based on this ACK/NACK.
In addition, despread unit 51 is used the shared spreading code of each communication terminal in the sub-district, to carrying out despreading from the receiving baseband signal that receives radio-cell 42 outputs, extracts control signal thus.From the despread signal of despread unit 51 output by demodulating unit 52 demodulation after, be imported into channel-decoding unit 53.Channel-decoding unit 53 by time division multiplexing in the scheduling result information that mails to each communication terminal of control signal, extract the scheduling result information mail to self terminal.Communication terminal is controlled uplink transmission packets rate based on this scheduling result information.
Transmitting system then is described.Communication terminal shown in Figure 2 changes encoding rate and order of modulation, spread spectrum rate for sending grouping, for other data these parameters is changed.Specifically, packet signal (PILOT), downstream signal transmission power control commands (DL-TPC) and send data and be encoded after chnnel coding unit 250, modulating unit 251 and spectrum-spreading unit 252 that rate, order of modulation and spread spectrum rate be respectively fixing handle successively, the signal behind the spread spectrum is output to amplifying unit 253.
Relative therewith, send grouping and at first be stored in buffer 254.Buffer 254 is according to ACK/NACK, if the words of ACK will send the grouping deletion that the last time sends for the first time grouping and output to chnnel coding unit 259, if the transmission grouping that the words of NACK send the last time outputs to chnnel coding unit 259 once more.
And 255 pairs of data volume determination units are stored in the data volume of the transmission grouping of buffer 254 and measure, and data volume determination unit 255 outputs to transfer rate selected cell 257 and rate request selected cell 256 with measurement result.
Transfer rate selected cell 257 is based on the transfer rate information that comprises the scheduling result information that sends from radio base station apparatus shown in Figure 1 and extracted by channel-decoding unit 53, memory data output, transmitted power allowance and the transfer rate combined information in the buffer 254, select the actual uplink transmission packets rate that sends in the scope below the transfer rate of transfer rate information representation, when selected transfer rate is notified to rate request selected cell 256, also is notified to and sends parameter setting unit 258.Here, during the transmitted power inadequate resource of communication terminal, and the transmission data of communication terminal more after a little while, and transfer rate selected cell 257 is selected the lower transfer rate of transfer rate more represented than transfer rate information sometimes.
Rate request selected cell 256 generates the transfer rate solicited message based on the transfer rate of transfer rate selected cell 257 notices, memory data output and the transmitted power allowance in the buffer 254, and this is outputed to chnnel coding unit 259.This transfer rate solicited message is the information of the desired transmission transmission packets rate of expression communication terminal, for example represents with 1～n (n is the natural number more than 2).
Send the transfer rate of parameter setting unit 258 based on transfer rate selected cell 257 notices, when reading the transmission grouping that is stored in buffer 254 and controlling speed, the encoding rate of chnnel coding unit 259, the order of modulation of modulating unit 260 and the spread spectrum rate of spectrum-spreading unit 261 are set, these are sent parameter output to chnnel coding unit 259, modulating unit 260 and spectrum-spreading unit 261 respectively.And the side-play amount of the transmitted power when sending parameter setting unit 258 based on transfer rate setting transmission grouping outputs to transmission power control unit 263 with this.
Illustrate one in passing, the transmitted power allowance of input transfer rate selected cell 257 and rate request selected cell 256 is to be set by transmitted power determination unit 265.Specifically, transmitted power determination unit 265 is set the transmitted power allowance based on the maximum transmit power that the transmitted power of being controlled according to upstream circuit power control command (UL-TPC) by transmission power control unit 264 and self terminal can send.In addition, generating the transmission power control unit 263 that sends the transmitting power control signal that divides into groups is configured to: generate giving from the control signal of transmission power control unit 264 by the transmitting power control signal that sends the skew of setting parameter setting unit 258.This transmission power control unit 264 generates other pilot signal, downgoing line transmission power control commands (DL-TPC) and sends the transmitting power control signal of data.
After being amplified independently by each self-corresponding amplifying unit 253 and 262 from each spread-spectrum signals of spectrum-spreading unit 252 and spectrum-spreading unit 261 outputs, by after sending radio-cell 266 and carrying out predetermined wireless processing such as digitaltoanalogconversion and up-conversion, be sent out by antenna 41.
Then, the scheduling unit 31 to radio base station apparatus shown in Figure 1 describes.Fig. 3 is the block diagram of structure of scheduling unit of the radio base station apparatus of expression embodiment of the present invention 1.
At Fig. 3, the transfer rate solicited message (transfer rate of being asked or transmitted power allowance, data volume etc.) that sends from communication terminal is input to terminal selected cell 311.Terminal selected cell 311 according to predetermined dispatching algorithm (for example, (Round Robin) method or proportional fairness (proportional fairness) method etc. are shared in circulation), from the terminal that sends the transfer rate solicited message, select permission to send the communication terminal of uplink grouping.Then, the end message (for example, terminal number) with the selected terminal of expression is input to transfer rate selected cell 312 and scheduling result information output unit 314.
The transfer rate combined information of combination that expression is employed as a plurality of transfer rates of uplink transmission packets rate be imported into mapping control unit 313 and, the transfer rate combined information can be the intrinsic information of this mobile communication system, and be stored in the base station apparatus, also can be the information of coming by as the control station notice of host station.Then, the candidate of the transfer rate that can select at transfer rate selected cell 312 of mapping control unit 313 is defined as the part of the represented a plurality of transfer rates of transfer rate combined information.Then, mapping control unit 313 is transformed into bit respectively with the candidate of the transfer rate that limits and shines upon, with the bit input transfer rate selected cell 312 after this mapping.In addition, the back of action more specifically of relevant mapping control unit 313 is discussed.
Transfer rate solicited message and uplink grouping are imported into transfer rate selected cell 312 with the received power resource.And, for transfer rate selected cell 312, from terminal selected cell 311 input terminal information, from the mapped bit (candidate of limited transfer rate just) of mapping control unit 313 inputs, and from SIR determination unit 29 input SIR.Transfer rate selected cell 312 is in the scope of uplink grouping with the received power resource, select any one transfer rate the candidate of the transfer rate that limits from mapping control unit 313, the transfer rate that allows as the uplink grouping that the communication terminal of selecting at terminal selected cell 311 (just allowing to send the communication terminal of uplink grouping) is sent.Transfer rate selected cell 312 is based on each the needed received power of the transfer rate candidate that limits at mapping control unit 313 (expression is the offset information that sends from communication terminal of the power with much degree etc. with respect to dedicated channel) and SIR, to each transfer rate prediction received power, in the scope of uplink grouping, be selected to the transfer rate of flank speed with the received power resource.Then, transfer rate selected cell 312 will represent that the transfer rate information of selected transfer rate is input to scheduling result information output unit 314.
314 pairs of scheduling result information output units make up and generate scheduling result information from the end message of terminal selected cell 311 inputs with from the transfer rate information of transfer rate selected cell 312 inputs, with this scheduling result information input channel coding unit 121.Then, the communication terminal that this scheduling result information is represented with end message carries out wireless transmission as control signal from antenna 108 as sending the destination, is notified to communication terminal.
Next, the action more specifically of mapping control unit 313 is described.
At first, transfer rate combined information shown in Figure 4 is imported into mapping control unit 313.In transfer rate combined information shown in Figure 4, the transfer rate of for example representing 8 kinds from 32kbps to 4Mbps is as the combination that is employed as uplink transmission packets rate.That is to say that in this mobile communication system, the transfer rate of 8 kinds from 32kbps to 4Mbps can be used as uplink transmission packets rate and uses.Therefore, in the transfer rate combined information, the candidate that all transfer rates of 8 kinds are defined as selecting (will be expressed as "Yes") as the transfer rate of selecting candidate.And the represented transfer rate of transfer rate combined information has 8 kinds, and the words of representing with Bit String need 3 bits (2 as shown in Figure 4 3).Then, 8 kinds of transfer rates from 32kbps to 4Mbps are mapped to 3 bits of " 111 "～" 000 " respectively.
Then, as shown in Figure 5, mapping control unit 313 is in represented 8 kinds the transfer rate from 32kbps to 4Mbps of transfer rate combined information, the candidate of transfer rate is defined as 4 kind the transfer rate (will as the transfer rate of selecting candidate be expressed as " YES ", and will as selection candidate transfer rate be expressed as " NO ") of 512kbps to 4Mbps.The candidate of the transfer rate that mapping control unit 313 limits is 4 kinds in the example of Fig. 5, therefore words needs 2 bits of representing with Bit String (2 2).Like this, the bit number of the transfer rate that the bit number of the transfer rate candidate of qualification represents than the transfer rate combined information is lacked.Then, mapping control unit 313 will 4 kinds of transfer rates from 512kbps to 4Mbps be mapped to 2 bits of " 11 "～" 00 " respectively.Then, with 4 kinds of transfer rate candidate input transfer rate selected cells 312 after the mapping.
At transfer rate selected cell 312, candidate from 4 kinds of transfer rates limiting, just among 512kbps (" 11 "), 1Mbps (" 10 "), 2Mbps (" 01 "), the 4Mbps (" 00 "), select the uplink transmission packets rate that sends by the communication terminal that terminal selected cell 311 is selected.
Here, Time and Rate Scheduling is suitable for making the communication terminal of minority to send uplink packet scheduling method with high transmission rates.Therefore, select the possibility of low transfer rate minimum, so transfer rate that will be lower is got rid of also almost not influence outside selecting candidate at transfer rate selected cell 312.Therefore, in the present embodiment, as shown in Figure 5, mapping control unit 313 is defined as in 8 kinds of transfer rates that the transfer rate combined information represents 4 kinds of transfer rates from height ordering beginning with the candidate of transfer rate.
In addition, for getting rid of in 4 kinds of transfer rates selecting outside the candidate, the dispatching method that also can use existing dedicated channel or be used for other low rate is notified.For example, also can use Rate scheduling 2 described as above-mentioned non-patent literature, carry out the interpolation or the deletion (E-DCH TFCS addition/deletion) of transfer rate with the pointer of Up/down.
Thus,, can be reduced to 4 kinds from 8 kinds, the bit number of transfer rate information will be reduced to 2 bits from 3 bits, and therefore, can reduce the transmitted power of the control signal of downgoing line the kind of the transfer rate of communication terminal notice according to present embodiment.Therefore, can suppress the consumption of the transmitted power resource of downgoing line.In addition, owing to reduced the bit number of transfer rate information, the number of combinations of transfer rate is reduced to 4 kinds from 8 kinds, therefore correspondingly the intersymbol between each transfer rate information apart from increase.Its result can improve the judgement precision in the transfer rate information of communication terminal.
In addition, in the present embodiment, though, also can for example be defined as below 7 kinds from 8 kinds can the kind of the transfer rate of communication terminal notice being described from 8 kinds of examples that are defined as 4 kinds.For example, " 000 " in " 000 "～" 111 " and " 111 " is being got rid of, in the time of can being defined as 6 kinds to the kind of the transfer rate of communication terminal notice, the bit number of transfer rate information remains 3 bits, but the number of combinations of transfer rate reduces to 6 kinds from 8 kinds, therewith correspondingly the intersymbol between each transfer rate information apart from increase.That is to say that getting rid of the situation of " 000 ", at communication terminal, think notified " 100 ", " 010 ", " 001 " the possibility step-down of by mistake " 000 ", error rate diminishes.Similarly, getting rid of the situation of " 111 ", at communication terminal, think notified " 110 ", " 010 ", " 011 " the possibility step-down of by mistake " 111 ", error rate diminishes.Thus, even do not make the minimizing bit number in the transfer rate information after qualification, but as long as limit the candidate number of the transfer rate that can select, error rate will diminish.Therefore, in the time of information same degree before the error rate after limiting is maintained in and limits, can improve the transmitted power that degree correspondingly reduces the control signal of the downgoing line that is used to send transfer rate information with error rate characteristic.
(execution mode 2)
In the present embodiment, the situation that the candidate to transfer rate limits is described under the state of the scope of roughly keeping selectable transfer rate.
With above-mentioned execution mode 1 similarly, transfer rate combined information shown in Figure 4 be imported into the mapping control unit 313.Then, mapping control unit 313 in represented 8 kinds the transfer rate from 32kbps to 4Mbps of transfer rate combined information, is defined as the candidate of transfer rate 4 kinds the transfer rate of 64kbps, 256kbps, 1Mbps, 4Mbps as shown in Figure 6.In transfer rate combined information shown in Figure 4, between 8 kinds of transfer rates from 32kbps to 4Mbps, the relation between the adjacent transfer rate becomes the relation of twice.Relative therewith, in Fig. 6, be restricted to 64kbps, 256kbps, 1Mbps, 4Mbps 4 kinds as the transfer rate of selecting candidate, the relation between transfer rate adjacent between 4 kinds of transfer rates becomes four times relation.In other words, in the present embodiment, when limiting the candidate of transfer rate, make the variable quantity between each of a plurality of transfer rates that the variable quantity between each candidate of transfer rate of qualification represents greater than the transfer rate combined information.And, in the present embodiment, when limiting the candidate of transfer rate, roughly keep high transmission rates and minimum transfer rate.Specifically, be 32kbps～4Mbps with respect to selectable range at Fig. 4, be 64kbps～4Mbps at Fig. 6.After limiting the selection candidate like this, mapping control unit 313 is mapped to 4 kinds of transfer rates of 64kbps, 256kbps, 1Mbps, 4Mbps respectively 2 bits of " 11 ", " 10 ", " 01 " " 00 ".Then, with 4 kinds of transfer rate candidate input transfer rate selected cells 312 after the mapping.
Thus, according to present embodiment, by off and on the selection candidate of transfer rate being carried out the selection candidate that sparse processing limits transfer rate, can be under the state of the scope of roughly keeping selectable transfer rate, reduce the bit number of transfer rate information and reduce the transmitted power of the control signal of downgoing line.
(execution mode 3)
In the present embodiment, illustrate that a plurality of communication terminals that will exist in the sub-district are divided into a plurality of groups, notify the situation of identical transfer rate to the communication terminal that belongs to each group.
When a plurality of communication terminals that exist in the sub-district are divided into a plurality of groups, shown in Fig. 7 A～C, dispatch by three following steps.In addition, represent that in Fig. 7 A～C four communication terminals of communication terminal (MS) #A～communication terminal #D are divided into the example of group 1 (communication terminal #A, #C) and group 2 (communication terminal #B, #D).At first, at first step, communication terminal #A～#D carries out the request (Fig. 7 A) of transfer rate to the base station.Then in second step, base station (BS) is based on dispatching from the request transfer rate of communication terminal #A～#D notice, is the communication terminal that the uplink grouping is selected to allow to send by unit with the group, all communication terminals of the group that belongs to selection are sent shared scheduling result information (Fig. 7 B).Organize 1 selected in this hypothesis.Then at third step, receive the communication terminal (just communication terminal #A and #C) of the control signal that mails to self terminal, send uplink grouping (Fig. 7 C) with the transfer rate below the transfer rate of base station indication.
Like this, the situation a plurality of communication terminals that are divided into group being sent a scheduling result information becomes and simultaneously a plurality of communication terminals is allowed the transmission of uplink grouping.In other words, become the received power resource of using the uplink of base station by a plurality of communication terminals simultaneously.In addition, the received power resource and the downgoing line of the uplink of base station are same, have the upper limit.Therefore, in the situation that a plurality of communication terminals that are divided into group is sent a scheduling result information, each communication terminal is selected lower transfer rate.In other words, when communication terminal is divided into group, select the possibility of high transmission rates to diminish, so higher transfer rate is got rid of also almost not influence outside the selection candidate at transfer rate selected cell 312.
Therefore, in the present embodiment, as shown in Figure 8, mapping control unit 313 is defined as in 8 kinds of transfer rates that the transfer rate combined information represents 4 kinds of transfer rates from low ordering beginning with the candidate of transfer rate.In other words, mapping control unit 313 in represented 8 kinds the transfer rate from 32kbps to 4Mbps of transfer rate combined information, 4 kinds transfer rate till being defined as the candidate of transfer rate from 32kbps to 256kbps.Then, mapping control unit 313 will 4 kinds of transfer rates from 32kbps to 256kbps be mapped to 2 bits of " 11 "～" 00 " respectively.Then, with 4 kinds of transfer rate candidate input transfer rate selected cells 312 after the mapping.
Thus, according to present embodiment, with execution mode 1 similarly, can be reduced to 4 kinds from 8 kinds to the kind of the transfer rate of communication terminal notice, the bit number of transfer rate information is reduced to 2 bits from 3 bits, therefore, can reduce the transmitted power of the control signal of downgoing line.Therefore, can suppress the consumption of the transmitted power resource of downgoing line.
(execution mode 4)
In the present embodiment, the situation that limits the candidate of transfer rate according to the ability of communication terminal is described.And the ability of communication terminal is, for example the definition such as kind of TTI (Transmission TimeInterval) length of the maximum transfer rate that can be communicated by letter by this communication terminal, maximum data length, maximum yardage, minimum spread spectrum rate, support.
Fig. 9 is the block diagram of structure of scheduling unit of the radio base station apparatus of expression embodiment of the present invention 4.And,, give identical numbering and omit its explanation for the structure identical with Fig. 3 (execution mode 1) at Fig. 9.
The transfer rate combined information is imported into mapping control unit 315.And the terminal ability information of the ability of the communication terminal of expression transmission transfer rate solicited message is imported into mapping control unit 315.The terminal ability information here is that the expression communication terminal is until the ability that can both send till which transfer rate.For example, when communication terminal #A is the communication terminal (4Mbps terminal) that can both send till 4Mbps, the terminal ability information of communication terminal #A is " 4Mbps ", when communication terminal #B was the communication terminal (1Mbps terminal) that can both send till 1Mbps, the terminal ability information of communication terminal #B was " 1Mbps ".Then, mapping control unit 315 is based on terminal ability information, and the candidate of the transfer rate that can select at transfer rate selected cell 312 is defined as the part of the represented a plurality of transfer rates of transfer rate combined information.Specifically be to limit in the following manner.
For example, communication terminal #A is the 4Mbps terminal, when communication terminal #B is the 1Mbps terminal, mapping control unit 315 as shown in figure 10, the transfer rate that the terminal ability information of each communication terminal is represented limits the selection candidate of transfer rate as flank speed.In example shown in Figure 10,, as flank speed, the selection candidate of transfer rate is defined as 4 transfer rates (4Mbps, 2Mbps, 1Mbps, 512kbps) with 4Mbps for communication terminal #A (4Mbps terminal).And,, as flank speed, the selection candidate of transfer rate is defined as 4 transfer rates (1Mbps, 512kbps, 256kbps, 128kbps) with 1Mbps for communication terminal #B (1Mbps terminal).Thus, in the present embodiment, make the candidate difference of the transfer rate of qualification according to the ability of communication terminal.
In addition, also make the mapping difference of the transfer rate of qualification according to the ability of communication terminal.In other words, in Figure 10, to communication terminal #A (4Mbps terminal) and communication terminal #B (1Mbps terminal) any one, can select the transfer rate of 1Mbps and 512kbps., with respect to the situation in communication terminal #A (4Mbps terminal), 1Mbps is mapped to " 10 ", and 512kbps is mapped to " 11 ", and in the situation of communication terminal #B (1Mbps terminal), 1Mbps is mapped to " 00 ", and 512kbps is mapped to " 01 ".
In addition, in mapping control unit 315, as shown in figure 11, with respect to being as flank speed with 4Mbps to communication terminal #A (4Mbps terminal), the selection candidate of transfer rate is defined as 4 transfer rates (4Mbps, 2Mbps, 1Mbps, 512kbps), to communication terminal #B (1Mbps terminal) is to be flank speed with 1Mbps, and the selection candidate of transfer rate is defined as 2 transfer rates (1Mbps, 512kbps), can make the number difference of the transfer rate of qualification according to the ability of communication terminal.At this moment, preferably, terminal capability is low more, makes the number of transfer rate of qualification few more.
Thus, according to present embodiment, because the ability according to communication terminal makes selectable transfer rate difference limit the selection candidate of transfer rate, can reduce the bit number of transfer rate information and reduce the transmitted power of the control signal of downgoing line, simultaneously can be to the suitable transfer rate of each communication terminal notice based on the ability of communication terminal.
(execution mode 5)
In the present embodiment, the situation to the candidate that can switch the transfer rate that limits in communication describes.
Figure 12 is the block diagram of structure of scheduling unit of the radio base station apparatus of expression embodiment of the present invention 5.And,, give identical numbering and omit its explanation for the structure identical with Fig. 3 (execution mode 1) at Figure 12.
The transfer rate combined information is imported into mapping control unit 316.And the transfer rate restricted information is imported into mapping control unit 316.In addition, the transfer rate restricted information is in the communication of base station, by the communications status of the user throughput of the communication terminal number of notifying control station for example to hold at present according to wireless communication system as the control station of host station or interference volume, uplink or downgoing line, throughput of system, traffic carrying capacity (for example data volume in the buffer) etc., the content of transfer rate restricted information is switched aptly and notified.Then, mapping control unit 316 when the transfer rate restricted information input that comes from control station notice is being arranged in the communication in the base station each time, the candidate of the transfer rate that can select at transfer rate selected cell 312 be defined as in the represented a plurality of transfer rates of transfer rate combined information, the represented transfer rate of transfer rate restricted information.In other words, mapping control unit 316 is based on the transfer rate restricted information, and the candidate of the transfer rate that can select at transfer rate selected cell 312 is defined as the part of the represented a plurality of transfer rates of transfer rate combined information.Then, mapping control unit 316 is transformed into bit respectively with the candidate of the transfer rate that limits and shines upon, with the bit input transfer rate selected cell 312 after this mapping.Specifically be to carry out following action.
Control station is suitable switch and notice, the transfer rate restricted information shown in Figure 13 (a)～(c) is imported into mapping control unit 316.This transfer rate restricted information is the information (be expressed as "Yes" as the transfer rate of selecting candidate, be not expressed as "No" as the transfer rate of selecting candidate) that the candidate that is used for the transfer rate that can select at transfer rate selected cell 312 is defined as the part of a plurality of transfer rates that the transfer rate combined information represents.And the candidate of the transfer rate that the transfer rate restricted information is represented is 4 kinds or 3 kinds in the example of Figure 13 (a)～(c), therefore words needs 2 bits of representing with Bit String (2 2).Like this, the bit number of the transfer rate represented than the transfer rate combined information of the bit number that makes the transfer rate candidate that the transfer rate restricted information represents lacks.
Then, mapping control unit 316 is in the input of the transfer rate restricted information shown in Figure 13 (a), in represented 8 kinds the transfer rate from 32kbps to 4Mbps of transfer rate combined information, 4 kinds transfer rate till being defined as the candidate of transfer rate from 256kbps to 2Mbps.Then, mapping control unit 316 will 4 kinds of transfer rates from 256kbps to 2Mbps be mapped to 2 bits of " 11 "～" 00 " respectively.Then, with 4 kinds of transfer rate candidate input transfer rate selected cells 312 after the mapping.
And, mapping control unit 316 is in the input of the transfer rate restricted information shown in Figure 13 (b), in represented 8 kinds the transfer rate from 32kbps to 4Mbps of transfer rate combined information, 4 kinds transfer rate till being defined as the candidate of transfer rate from 128kbps to 1Mbps.Then, mapping control unit 316 will 4 kinds of transfer rates from 128kbps to 1Mbps be mapped to 2 bits of " 11 "～" 00 " respectively.Then, with 4 kinds of transfer rate candidate input transfer rate selected cells 312 after the mapping.
And, mapping control unit 316 is in the input of the transfer rate restricted information shown in Figure 13 (c), in represented 8 kinds the transfer rate from 32kbps to 4Mbps of transfer rate combined information, 3 kinds transfer rate till being defined as the candidate of transfer rate from 256kbps to 1Mbps.Then, mapping control unit 316 will 3 kinds of transfer rates from 256kbps to 1Mbps be mapped to 2 bits of " 11 ", " 10 ", " 01 " respectively.Then, with 3 kinds of transfer rate candidate input transfer rate selected cells 312 after the mapping.
Thus, according to present embodiment, communications status according to communication terminal number that in communication, changes or interference volume etc., come the suitable content of switching the transfer rate restricted information, and notify the base station from control station, therefore the switching that can be in communication in the base station candidate of the transfer rate that limits be suited, its result, can reduce the bit number of transfer rate information and reduce the transmitted power of the control signal of downgoing line, simultaneously can be to the suitable transfer rate of each communication terminal notice based on communications status.
(execution mode 6)
In the present embodiment, the situation that the transmission destination according to transfer rate information is limited the candidate of transfer rate describes.
Figure 14 is the block diagram of structure of scheduling unit of the radio base station apparatus of expression embodiment of the present invention 6.And,, give identical numbering and omit its explanation for the structure identical with Fig. 3 (execution mode 1) at Figure 14.
The transfer rate combined information is imported into mapping control unit 317.And end message is input to mapping control unit 317 from terminal selected cell 311.End message is the information that expression allows the communication terminal of transmission uplink grouping, also is simultaneously the information of the transmission destination of expression transfer rate information.And, as shown in Embodiment 3, a plurality of communication terminals that exist in the sub-district are divided into group, are that unit is when selecting to allow to send the communication terminal of uplink grouping with the group, end message becomes the information (for example, group #) that the group of terminal selected cell 311 selections is determined.On the other hand, be not divided into group at a plurality of communication terminals, even or a plurality of communication terminal is divided into group, but be that unit is when selecting to allow to send the communication terminal of uplink grouping with the communication terminal, end message becomes the information (for example, terminal number) that the communication terminal of terminal selected cell 311 selections is determined.In other words, the transmission destination of transfer rate information is the information that is used for determining each communication terminal sometimes, is the information that is used for the affiliated group of definite each communication terminal sometimes.
Therefore, mapping control unit 317 makes the candidate difference of the transfer rate of qualification as illustrated in fig. 15 according to the end message (information of just representing the transmission destination of transfer rate information) from 311 inputs of terminal selected cell.In other words, from terminal selected cell 311 input terminals numberings as when sending the destination, mapping control unit 311 is defined as in 8 kinds of transfer rates that the transfer rate combined information represents 4 kinds of transfer rates from height ordering beginning with the candidate of transfer rate.On the other hand, from terminal selected cell 311 input group # as when sending the destination, mapping control unit 311 is defined as in 8 kinds of transfer rates that the transfer rate combined information represents 4 kinds of transfer rates from low ordering beginning with the candidate of transfer rate.
Thus, in the present embodiment, be the situation of terminal number in the transmission destination of transfer rate information and be the situation of group #, make the candidate difference of the transfer rate of qualification, therefore the qualification of the transfer rate candidate that can suit according to each situation.And, can be the situation of terminal number in the transmission destination of transfer rate information and be the situation of group #, commonization of form with scheduling result information, therefore in the time of when communication terminal can be terminal number in the transmission destination of transfer rate information with for group #, with identical demodulation method the scheduling object information is carried out demodulation, thereby a plurality of communication terminals can be divided in groups, and not make demodulation process become complicated at communication terminal.
In addition, in the above-described embodiment, although understand the situation that selectable transfer rate is limited, but for the transmitted power that above-mentioned circuit divides into groups, can implement too when selectable transmitted power is limited.For example, in 8 kinds of transmitted powers of 22dBm, 20dBm, 18dBm, 16dBm, 14dBm, 12dBm, 10dBm, 8dBm, the selection candidate of transmitted power is defined as 22dBm and 20dBm 2 kinds, and selection gets final product with any one corresponding transfer rate of 2 kinds of transmitted powers of 22dBm and 20dBm then.
In addition, in the above-described embodiment, although understand the situation that selectable transfer rate is limited, but about (for example to the transmit power offset of the uplink grouped channels of other channels such as dedicated channel, transmit power offset to the E-DPDCH of DPCCH, to the transmit power offset of DPDCH and the E-DPDCH of DPCCH, perhaps to the transmit power offset of the channel beyond the DPCCH of DPCH), can implement too the situation that selectable transmit power offset limits.For example, 30dB, 25dB, 20dB, 15dB, 10dB, 5dB, 0dB ,-8 kinds of transmit power offset of 5dB in, the selection candidate of transmit power offset is defined as Figure 16 or 4 kinds shown in Figure 17.In other words, hard-core the time, be defined as 30dB, 25dB, 20dB, 15dB 4 kinds, when the restriction till the 25dB is arranged, be defined as 25dBm, 20dB, 15dB, 10dB 4 kinds, when the restriction till the 20dB is arranged, be defined as 20dB, 15dB, 10dB, 5dB 4 kinds, select then with this transmit power offset candidate of 4 kinds in any one corresponding transfer rate get final product.In addition, in this example, be 5dB though make the step-length of transmit power offset, step-length is not limited thereto.And, though, also can represent with true value with dB unit representation transmit power offset.In addition, also can recently represent with amplitude ratio rather than power.
(execution mode 7)
In the present embodiment, following situation is described, that is, the data length that use to send grouping is as transfer rate information, the situation of coming the selection candidate to the data length of notifying the base station from communication terminal to limit according to the ability of communication terminal.And make the data length that sends grouping as transfer rate information, and the reason of the base station being notified from communication terminal is that in the base station apparatus that receives this grouping, when grouping was decoded, compared with transfer rate, data length was more convenient.In addition, data length can comprise the error detecting code of CRC than top grade.
Figure 18 is the block diagram of structure of the communication terminal of expression embodiment of the present invention 7.And,, give identical numbering and omit its explanation for the structure identical with Fig. 2 (execution mode 1) at Figure 18.
Transfer rate selected cell 257 is selected the data length of the actual uplink grouping that sends, and notifies rate request selected cell 256 with selected data length, notifies simultaneously to send parameter setting unit 258.Then, transfer rate selected cell 257 generates the transfer rate information of this data length of expression and outputs to chnnel coding unit 267.This transfer rate information is encoded in chnnel coding unit 267, modulate at modulating unit 268, carry out spread spectrum at spectrum-spreading unit 269, amplify at amplifying unit 270, and, be sent to the base station by antenna 41 by after sending radio-cell 266 and carrying out predetermined wireless processing such as digitaltoanalogconversion and up-conversion.
Then, the transfer rate selected cell 257 to communication terminal shown in Figure 180 describes.Figure 19 is the block diagram of structure of transfer rate selected cell of the communication terminal of expression embodiment of the present invention 7.
The transfer rate combined information of combination of a plurality of data lengths that expression is employed as the data length of uplink grouping is imported into mapping control unit 411.And the transfer rate combined information can be the intrinsic information of this mobile communication system, and is stored in the communication terminal, also can be the information of being come by the base station notice by the control station as host station.And, represent that the terminal ability information of the ability of communication terminal shown in Figure 180 is imported into mapping control unit 411.Then, mapping control unit 411 is based on terminal ability information, and the candidate of the data length that can select at selected cell 412 is defined as the part in the represented a plurality of data lengths of transfer rate combined information.Then, mapping control unit 411 is transformed into bit respectively with the candidate of the data length that limits and shines upon, with the bit input selected cell 412 after this mapping.In addition, the action more specifically of mapping control unit 411 is with aftermentioned.
Scheduling result information, the data volume, the transmitted power allowance that send grouping be imported into selected cell 412 and, be imported into selected cell 412 at the bit (candidate of limited data length just) of mapping control unit 411 mappings.Selected cell 412 is from selecting any one data length, as the data length of the uplink grouping that sends the candidate of the data length that shines upon control unit 411 qualifications.At this moment, selected cell 412 is selected any one data length based on scheduling result information, data volume and transmitted power allowance.Then, selected cell 412 will represent that the transfer rate information of selected data length outputs to transmission parameter setting unit 258, rate request selected cell 256 and chnnel coding unit 267.Then, the transfer rate information that outputs to chnnel coding unit 267 is informed to base station apparatus as the control signal of expression from the data length of the uplink grouping of communication terminal transmission.
In addition, in the above description,, also can import other information and transfer rate information is encoded together though show the structure that transfer rate information input channel coding unit 267 is only arranged.For example, in the situation that is suitable for HARQ (Hybrid Automatic Repeat reQuest), can will encode with transfer rate information about the control information (sending number of times, the index of new data, the Redundancy Version of IR etc.) of HARG and send to the base station.
Next, the action more specifically of mapping control unit 411 is described.
At first, transfer rate combined information shown in Figure 20 is imported into mapping control unit 411.In transfer rate combined information shown in Figure 20, for example represent of the combination of the data length of 12 kinds from Nbits to 128Nbits as the data length of the data length that is employed as the uplink grouping.That is to say that in this mobile communication system, the data length that the data length of 12 kinds from Nbits to 128Nbits can be used as the uplink grouping uses.Therefore, in the transfer rate combined information, the candidate that all data lengths of 12 kinds are defined as selecting (will be expressed as "Yes") as the data length of selecting candidate.And the represented data length rate of transfer rate combined information has 12 kinds, and the words of representing with Bit String need 4 bits (2 as shown in figure 20 4).Then, 12 kinds of data lengths from Nbits to 128Nbits are mapped to 4 bits of " 0000 "～" 1011 " respectively.In addition, in data length, N represents the predetermined bit number as benchmark, and for example, data length 2N represents the data length of bit number of the twice of reference bit number.
Here, the terminal ability information of present embodiment is the ability that the expression communication terminal can both send till which data length.For example, when communication terminal #A is the communication terminal (high capable terminal) that can both send till 128Nbits, the terminal ability information of communication terminal #A is " 128Nbits ", when communication terminal #B was the communication terminal (low ability terminal) that can both send till 32Nbits, the terminal ability information of communication terminal #B was " 32Nbits ".Then, mapping control unit 411 is based on terminal ability information, and the candidate of the data length that can select at selected cell 412 is defined as the part in the represented a plurality of data lengths of transfer rate combined information.Concrete as limiting in the following manner.
For example, communication terminal #A is high capable terminal, when communication terminal #B is low ability terminal, mapping control unit 411 as shown in figure 21, the data length that the terminal ability information of each communication terminal is represented limits the selection candidate of data length as the data length of maximum.In the represented example of Figure 21, for communication terminal #A (high capable terminal), with the data length of 128Nbits, the selection candidate of data length is defined as 8 data length (128Nbits, 64Nbits, 32Nbits, 24Nbits, 16Nbits, 12Nbits, 8Nbits, 6Nbits) as maximum.And, for communication terminal #B (low ability terminal), with the data length of 32Nbits, the selection candidate of data length is defined as 8 data length (32Nbits, 24Nbits, 16Nbits, 12Nbits, 8Nbits, 6Nbits, 4Nbits, 3Nbits) as maximum.Thus, in the present embodiment, make the candidate difference of the data length of the maximum that becomes the data length of selecting candidate and qualification according to the ability of communication terminal.
In addition, also make the mapping difference of the data length of qualification according to the ability of communication terminal.In other words, in Figure 21, to communication terminal #A (high capable terminal) and communication terminal #B (low ability terminal) any one, can select the data length of 6Nbits～32Nbits., with respect to the situation in communication terminal #A (high capable terminal), for example 32Nbits is mapped to " 101 ", 24Nbits is mapped to " 100 ", in the situation of communication terminal #B (low ability terminal), 32Nbits is mapped to " 111 ", and 24Nbits is mapped to " 110 ".
Then, the candidate of 8 kinds of data lengths that mapping control unit 411 will shine upon is input to selected cell 412, in selected cell 412, selects any one data length as transfer rate information from the candidate of this data length of 8 kinds.
And, in mapping control unit 411, as shown in figure 22, can make the data length of the represented data length of the terminal ability information of each communication terminal as maximum, limit the selection candidate of data length off and on.
In addition, communication terminal can switch the ability of communication terminal aptly according to communication conditions.
Thus, according to present embodiment, use the data length that sends grouping as transfer rate information, can be reduced to 8 kinds from 12 kinds to the kind of the data length of base station notice, the bit number of transfer rate information is reduced to 3 bits from 4 bits, therefore, can reduce the transmitted power of the control signal of uplink.Therefore, can suppress the consumption of the transmitted power resource of uplink.Have again, owing to make selectable data length difference based on the ability of communication terminal, and the selection candidate of data length is limited, therefore can be to the suitable data length of base station apparatus notice corresponding to the ability of communication terminal.
(execution mode 8)
The TTI of uplink grouping is short more, can become short more with the data length that 1 grouping sends, and on the contrary, the TTI of uplink grouping is long more, can become long more with the data length that 1 grouping sends.Therefore, in the situation of short TTI, even the long data length that this TTI can't be sent is prepared as the selection candidate, the data length of length at the very start can not be selected like that.Like this, according to the difference of TTI, be suitable as the data length difference of selecting candidate.Therefore, in the present embodiment, come limiting from the candidate of communication terminal to the data length of base station notice based on TTI.
Figure 23 is the block diagram of structure of transfer rate selected cell of the communication terminal of expression embodiment of the present invention 8.And,, give identical numbering and omit its explanation for the structure identical with Figure 19 (execution mode 7) at Figure 23.
With similarly above-mentioned, transfer rate combined information shown in Figure 20 is imported into mapping control unit 413.And, represent that the TTI information of employed TTI is imported into mapping control unit 413.Then, as shown in figure 24, mapping control unit 413 is based on TTI information, and the candidate of the data length that can select at selected cell 412 is defined as the part in the represented a plurality of data lengths of transfer rate combined information.
In other words, when the represented TTI of TTI information is longer than predetermined value (for the situation of long TTI), as shown in figure 24, for example with the data length of 128Nbits data length, the selection candidate of data length is defined as 8 data length (128Nbits, 64Nbits, 32Nbits, 24Nbits, 16Nbits, 12Nbits, 8Nbits, 6Nbits) as maximum.And, when the represented TTI of TTI information is shorter than predetermined value (for the situation of short TTI), as shown in figure 24, for example with the data length of 24Nbits data length, the selection candidate of data length is defined as 8 data length (24Nbits, 16Nbits, 12Nbits, 8Nbits, 6Nbits, 4Nbits, 3Nbits, 2Nbits) as maximum.Thus, in the present embodiment, make the candidate difference of the data length of the maximum that becomes the data length of selecting candidate and qualification according to TTI.
In addition, also make the mapping difference of the data length of qualification according to TTI.In other words, in Figure 24,, can select the data length of 6Nbits～24Nbits in the situation of long TTI and any situation of the situation of the TTI of weak point., with respect to the situation at long TTI, for example 24Nbits is mapped to " 100 ", and 16Nbits is mapped to " 011 ", and in the situation of short TTI, 24Nbits is mapped to " 111 ", and 16Nbits is mapped to " 110 ".
Then, the candidate of 8 kinds of data lengths that mapping control unit 413 will shine upon is input to selected cell 412, in selected cell 412, selects any one data length as transfer rate information from the candidate of this data length of 8 kinds.
And, in mapping control unit 413, as shown in figure 25, can set maximum data length based on each TTI, limit the selection candidate of data length off and on.
In addition, present embodiment and execution mode 7 combinations can be implemented.
Thus, according to present embodiment, with execution mode 7 similarly, use the data length that sends grouping as transfer rate information, can be reduced to 8 kinds from 12 kinds to the kind of the data length of base station notice, the bit number of transfer rate information is reduced to 3 bits from 4 bits, therefore, can reduce the transmitted power of the control signal of uplink.Therefore, can suppress the consumption of the transmitted power resource of uplink.Have again, owing to make selectable data length difference based on TTI, and the selection candidate of data length is limited, therefore can be to the suitable data length of base station apparatus notice based on employed TTI.
(execution mode 9)
In the present embodiment, to can in communication, describing to situation about the candidate of the data length of base station notice being switched from communication terminal.
Figure 26 is the block diagram of structure of transfer rate selected cell of the communication terminal of expression embodiment of the present invention 9.And,, give identical numbering and omit its explanation for the structure identical with Figure 19 (execution mode 7) at Figure 26.
The transfer rate combined information is imported into mapping control unit 414.And the transfer rate restricted information is imported into mapping control unit 414.The transfer rate restricted information is notified communication terminal by the control station as host station by the base station in the communication of communication terminal.The communications status of the communication terminal number that control station for example holds at present according to wireless communication system or the user throughput of interference volume, uplink or downgoing line, throughput of system, traffic carrying capacity (for example data volume in the buffer) etc. carries out suitable switching notice to the content of transfer rate restricted information.And control station comes the content of transfer rate restricted information is carried out suitable switching notice according to the hardware behaviour in service of base station.In addition, control station at communication terminal by other channels (for example, DPDCH, DPCCH, HS-DPCCH etc.) when partly using code tree (code tree), the upper limit of the transfer rate that determines according to remove the remaining code tree (spendable code tree just) of code tree the use from whole code tree is notified as the transfer rate restricted information.And, the spread spectrum rate of sign indicating number resource of expression E-DPDCH and the combined indexes (for example, MCS index) of yardage can be notified as the transfer rate restricted information.And, also can in communication terminal, generate the transfer rate restricted information.In addition, the content of transfer rate restricted information can be based on each communication terminal and difference, also can be based on each sub-district, frequency, switch and difference.
When mapping control unit 414 is transfused to from the transfer rate restricted information of control station by base station notice in the communication of communication terminal at every turn, the candidate of the data length that can select at selected cell 412 be defined as in the represented a plurality of data lengths of transfer rate combined information, the represented data length of transfer rate restricted information.In other words, mapping control unit 414 is based on the transfer rate restricted information, and the candidate of the data length that can select at selected cell 412 is defined as the part in the represented a plurality of data lengths of transfer rate combined information.Then, mapping control unit 414 is transformed into bit respectively with the candidate of the data length that limits and shines upon, with the bit input selected cell 412 after this mapping.Specifically, carry out like that below.
Control station is suitable switch and notice, transfer rate restricted information as shown in figure 27 is imported into mapping control unit 414.This transfer rate restricted information is the information (be expressed as " YES " as the data length of selecting candidate, be not expressed as " NO " as the data length of selecting candidate) that the candidate that is used for the data length that can select at selected cell 412 is defined as the part of a plurality of data lengths that the transfer rate combined information represents.And the candidate of the transfer rate that the transfer rate restricted information is represented is 6～8 kinds in the example of Figure 27, therefore words needs 3 bits of representing with Bit String (2 3).Like this, the bit number of the data length represented than the transfer rate combined information of the bit number of the data length candidate represented of transfer rate restricted information lacks.
Then, mapping control unit 414 is according to the transfer rate restricted information, for example hard-core the time, the candidate of data length is defined as in Nbits that the transfer rate combined information represents 12 kinds the data length till the 128Nbits 8 kinds of data lengths of Nbits～4Nbits, 8Nbits, 16Nbits, 32Nbits, 128Nbits.Then, mapping control unit 414 is mapped to this data length of 8 kinds respectively 3 bits of " 000 "～" 111 ".Then, 8 kinds of data length candidates after the mapping are input to selected cell 412.
In addition, in mapping control unit 412, as shown in figure 28, the mapping of data length that makes qualification according to the transfer rate restricted information is based on the upper limit of the data length that can use and difference.In other words, in Figure 28, for without limits, restriction till the 32Nbits is arranged, the restriction till the 16Nbits is arranged, all can select the data length of 16Nbits.; 16Nbits is mapped to " 110 " when be mapped to " 101 " respectively hard-core the time, the restriction till 32Nbits being arranged, be mapped to " 111 " when the restriction till 16Nbits is being arranged, and mapping is according to the upper limit of the data length that can use and difference.
And, in Figure 27 and Figure 28,, also can possess and will be excluded the table of being got rid of at the data length of selecting outside the candidate in advance though comprise the data length that is excluded selecting outside the candidate.In other words, as shown in figure 29, do not have data length in limited time (unconfined situation), grasp at communication terminal in advance and become 8 kinds of selection candidate data length and mapping thereof, when the restriction that has till 32Nbits or when restriction till 16Nbits is arranged, further limit the candidate of data length from these 8 kinds of data lengths according to the transfer rate restricted information.In addition, as shown in figure 28, no matter the upper limit of data length how, be restricted to the quantity of the data length of selecting candidate when identical (all being 8 kinds in Figure 28), as shown in figure 30, communication terminal is grasped in advance according to the upper limit of the data length that can use and different mappings, makes mapping according to the upper limit of data length and difference.For example, definition based on peaked a plurality of tables of the data length that can use (for example in communication terminal, 3 tables of maximum: 128Nbits, 32Nbits, 16Nbits) time, by coming switching table according to the transfer rate restricted information, can make the mapping difference of each data length according to the upper limit of the data length that can use.
In addition, as shown in figure 31, outside the upper limit of the data length that can use, also can be (for example according to the upper limit of the yardage of the channel that can be used for uplink grouping usefulness, the yardage that when E-DPDCH is scaled definite spread spectrum rate, can use), come the candidate of data length is limited, and further make the mapping difference of data length.Similarly, also can come definition list according to the yardage, peak transmission rate, terminal capability, the kind of terminal, TTI, the MCS index that use at other channels (for example, DPDCH, DPCCH, HS-DPCCH etc.).
In addition, present embodiment and execution mode 7 or execution mode 8 combinations can be implemented.
Thus, according to present embodiment, communications status according to communication terminal number that in communication, changes or interference volume etc., come the suitable content of switching the transfer rate restricted information, and notify communication terminal by the base station from control station, therefore the switching that can be in communication the candidate of the data length that limits be suited at communication terminal, its result, can reduce the bit number of transfer rate information and reduce the transmitted power of the control signal of uplink, simultaneously can be to the suitable data length of base station apparatus notice based on communications status.
In addition, in the respective embodiments described above, although understand transfer rate or data length as the situation to the messaging parameter of base station or communication terminal notice, but the kind of the messaging parameter of notifying is not limited thereto.Desirable a plurality of value as long as these a plurality of values are mapped to the messaging parameter that a plurality of Bit Strings are gone forward side by side and worked and know respectively, can be suitable for the present invention equally.
This specification is based on Japanese patent application 2004-137265 number of on May 6th, 2004 application and the Japanese patent application applied on October 22nd, 2004 2004-308456 number.Its content all is contained in this for reference.
Industrial utilization
The present invention has in the wireless communication systems such as high-speed packet transmission system or Wireless LAN system especially With.

Claims (9)

1, a kind ofly from a plurality of transfer rates, select any one transfer rate, and be notified to the radio base station apparatus of the communication terminal that allows to send the uplink grouping, comprising:
Limit the unit, the candidate of selectable transfer rate is defined as the part of described a plurality of transfer rates;
Selected cell from the candidate of the described transfer rate that limited, is selected described uplink transmission packets rate; And
Transmitting element sends to described communication terminal with the transfer rate information wireless of representing selected transfer rate and notifies.
2, radio base station apparatus as claimed in claim 1, wherein
Described qualification unit is defined as in described a plurality of transfer rate the candidate of described transfer rate from the transfer rate of the number of the regulation of height ordering beginning.
3, radio base station apparatus as claimed in claim 1, wherein
Described qualification unit is defined as the part of described a plurality of transfer rates with the candidate of described transfer rate, so that the variable quantity between the candidate of described transfer rate is greater than the variable quantity between described a plurality of transfer rates.
4, radio base station apparatus as claimed in claim 1, wherein
Described qualification unit is defined as in described a plurality of transfer rate the candidate of described transfer rate from the transfer rate of the number of the regulation of low ordering beginning.
5, radio base station apparatus as claimed in claim 1, wherein
The candidate that described qualification unit makes the described transfer rate that will limit is based on the ability of described communication terminal and difference.
6, radio base station apparatus as claimed in claim 1, wherein
Described qualification unit can switch the candidate of the described transfer rate that is limited in communication.
7, radio base station apparatus as claimed in claim 1, wherein
Be when being used for determining the information of each communication terminal in the transmission destination of described transfer rate information and when being used for determining the information of the group under described each communication terminal, described qualification unit makes the candidate difference of the described transfer rate that is limited.
8, a kind ofly from a plurality of transfer rates, select any one transfer rate, and be notified to the transmission rate notifying method of the communication terminal that allows to send the uplink grouping, comprising:
Limit step, the candidate of selectable transfer rate is defined as the part of described a plurality of transfer rates;
Select step, from the candidate of the described transfer rate that limited, the uplink transmission packets rate of selecting described communication terminal to send; And
Forwarding step sends to described communication terminal with the transfer rate information wireless of representing selected transfer rate and notifies.
9, a kind of wireless communication system that possesses radio base station apparatus and communication terminal, wherein,
From a plurality of transfer rates, select any one transfer rate, and be notified to the described radio base station apparatus of the communication terminal that allow to send the uplink grouping, the candidate of selectable transfer rate is defined as the part of described a plurality of transfer rates, from the candidate of the described transfer rate that limited, the uplink transmission packets rate of selecting described communication terminal to send, the transfer rate information wireless of representing selected transfer rate is sent to described communication terminal to be notified
Described communication terminal sends to described radio base station apparatus with described uplink grouping with the transfer rate below the represented described transfer rate of described transfer rate information.
CN2005800139583A 2004-05-06 2005-04-22 Radio base station apparatus and transmission rate notifying method Active CN1951138B (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2004137265 2004-05-06
JP137265/2004 2004-05-06
JP2004308456A JP3821823B2 (en) 2004-05-06 2004-10-22 Wireless communication terminal device and wireless communication method
JP308456/2004 2004-10-22
PCT/JP2005/007713 WO2005109945A1 (en) 2004-05-06 2005-04-22 Radio base station apparatus and transmission rate notifying method

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JP3821823B2 (en) 2004-05-06 2006-09-13 松下電器産業株式会社 Wireless communication terminal device and wireless communication method
WO2012032623A1 (en) * 2010-09-08 2012-03-15 富士通株式会社 Wireless communication apparatus, baseband processing apparatus, radio apparatus and communication control method

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CN103560862A (en) * 2013-10-18 2014-02-05 华为终端有限公司 Mobile terminal and coding-rate control method thereof
CN103560862B (en) * 2013-10-18 2017-01-25 华为终端有限公司 Mobile terminal and coding-rate control method thereof

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