CN102098261B - Based on communicator and the communication system of multicarrier transmission mode - Google Patents

Based on communicator and the communication system of multicarrier transmission mode Download PDF

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CN102098261B
CN102098261B CN201010609261.5A CN201010609261A CN102098261B CN 102098261 B CN102098261 B CN 102098261B CN 201010609261 A CN201010609261 A CN 201010609261A CN 102098261 B CN102098261 B CN 102098261B
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frequency band
band
mentioned
expansion
communicator
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CN102098261A (en
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大出高义
河崎义博
川端和生
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Fujitsu Internet Technology Co ltd
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Fujitsu Ltd
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Abstract

The invention provides a kind of communicator based on multicarrier transmission mode and communication system bulk cargo.This communicator is accommodated in by using the multicarrier transmission mode of a series of subcarrier to carry out each other in the communication system of information exchange at communicator, it is characterized in that, above-mentioned communicator comprises: send data generating section, this transmission data generating section is configured to generate the transmission data comprising service band information, and which frequency band of use is carried out data information transfer at above-mentioned communicator by this service band information instruction each other; Wherein, above-mentioned communicator is configured to by using specific frequency band to send above-mentioned service band information, above-mentioned specific frequency band is selected from the multiple frequency bands distributed for this communication system, and wherein, above-mentioned specific frequency band can switch to another frequency band in above-mentioned multiple frequency band.

Description

Based on communicator and the communication system of multicarrier transmission mode
The application is the applying date is on October 29th, 2004, application number is 200480044327.3 (international application no is PCT/JP2004/016154), and denomination of invention is the divisional application of the patent application of " communicator and communication system based on multicarrier transmission mode ".
Technical field
The present invention relates to the communication system by utilizing the multicarrier transmission mode of a series of subcarrier to carry out the exchange of information (data) each other at communicator, being particularly accommodated in the communicator in this communication system.
Background technology
As the above-mentioned communication system that the present invention discusses, a most preferred example is mobile body communication system, and later explanation is described for this mobile body communication system.Therefore, if according to this example, then above-mentioned communicator is (i) base station (or its upper base-station control apparatus), and is (ii) mobile radio station (mobile terminals of PDA etc.).And, conveniently, sometimes the former (i) is called " base station " in the explanation below, by the latter (ii) simply referred to as " terminal ".Wherein, by by below describe learn, the present invention can not only be applied to above-mentioned base station, can also be applied to above-mentioned terminal substantially samely, there is no need both intended distinction.
In mobile body communication system, guarantee that the transmission speed needed for user is very large problem providing in this service.On the other hand, the service band that mobile body communication system uses is fixed according to each system usually, even if so to have employed user multiplexing etc., its maximum transfer speed is also limited.Therefore, the method changing above-mentioned service band according to required transmission speed neatly is being inquired into.
And when considering by mobile body communication system entirety, behaviour in service is different according to above-mentioned each service band, and sometimes producing this frequency band completely cannot by the problem used.Therefore, from the viewpoint of effective utilization of frequency, the technology making service band variable is also being inquired into.
In this condition, the technology making service band variable in the multi-carrier transmission mobile body communication system of MC (Multi-Carrier)-CDMA (CodeDivisionMultipleAccess) and OFDM (OrthogonalFrequencyDivisionMultiplex) etc. is proposed.Such as propose the following method disclosed in 4 patent documentations 1 ~ 4.Its details will be described with reference to accompanying drawing below, but respective summary is as described below.
1) feature of " Multi-join queries method and apparatus " disclosed in patent documentation 1 is, comes freely service band to be distributed to user by splitting a series of subcarrier.
2) feature of " mobile radio station, base station apparatus and mobile communicating net " disclosed in patent documentation 2 is, the subcarrier band that setup control Signal transmissions is special in communication network.
3) feature of " method for channel allocation " disclosed in patent documentation 3 is, increases and decreases the quantity of a series of subcarrier according to the length of the communication distance between base station and mobile radio station.
4) feature of " wireless base station apparatus and wireless communications method " disclosed in patent documentation 4 is, by changing the bandwidth of each subcarrier in a series of subcarrier, makes the adaptive-bandwidth of service band.And each patent documentation above-mentioned is as follows.
Patent documentation 1: No. 9-205411, Japanese Unexamined Patent Publication
Patent documentation 2: No. 2003-264524, Japanese patent gazette JP
Patent documentation 3: No. 2004-21476, Japanese patent gazette JP
Patent documentation 4: No. 2002-330467, Japanese patent gazette JP
Conventional art based on above-mentioned 4 patent documentations 1 ~ 4 has following problem points.
1) in patent documentation 1 (No. 9-205411, Japanese Unexamined Patent Publication), owing to not transmitting the information of used subcarrier, decode so receiver side needs to receive all subcarriers, efficiency is low.
2) in patent documentation 2 (No. 2003-264524, Japanese patent gazette JP), although transmit the information about used subcarrier, but the shared control channel inherently received for transmitting this sub-carrier information, also needs to carry out demodulation code.
In addition, when carrying out user and being multiplexing, the information needed for user must be gone out from the extracting data transmitted this shared control channel.And then, due to this shared control channel input face to the information of each user, thus likely under lower transmission speed frequency band become not enough.Also due to its shared control channel that share to by all users, so once change used subcarrier, then can all users be had an impact.Therefore the subcarrier of this shared control channel cannot be changed simply.
3) in patent documentation 3 (No. 2004-214746, Japanese patent gazette JP), although the adaptive-bandwidth of data channel, but the fixing frequency band that shared control channel still uses all users to share, has the problem same with above-mentioned patent documentation 2.
4) in patent documentation 4 (No. 2002-330467, Japanese patent gazette JP), when consider use user multiplexing, in order to by the AF panel under the transmission of multiple user at reduced levels, also need between user, implement code multiplexing.But, if therefore between user the bandwidth of subcarrier different, then the intercept of code worsens, and finally becomes the reason of interference.
In order to prevent this interference, when certain user changes the bandwidth of subcarrier, other users also similarly must change the bandwidth of subcarrier.Its result, poor user tied down the situation that is transmitted, and the bandwidth of subcarrier constantly broadens, and reduces efficiency of transmission.Therefore, the bandwidth changing subcarrier has the defective work that sometimes cannot become effective means.
Summary of the invention
Therefore the present invention is in view of above-mentioned each problem points, its object is to provide a kind of service band that can be easy to carry out freely expanding, reduce or change each user in the whole frequency band distributing to communication system, and this expansion, reduce or change the communication system (mobile body communication system) that can not affect other users, a kind of communicator for this communication system (base station and/or terminal) is provided especially.
According to the present invention, as use below accompanying drawing describe in detail, set specific frequency band the multiple frequency bands first formed from splitting the whole frequency band distributing to this communication system.Then using this specific frequency band, whether " the service band information " of certain frequency band remaining should be used each other from a communication device transfers to another communicator at communicator by determining.And then, be " main band " in above-mentioned whole frequency band by this specific band setting.This main band also transmits " data message (user data) " except above-mentioned " service band information ".Also using at least 1 frequency band setting among the frequency band outside above-mentioned " main band " of the removing of above-mentioned multiple frequency band as " expansion frequency band ".This expansion frequency band is mainly used in transmitting further data message, can tackle the increase of data volume.Therefore, this expansion frequency band is set as required.But above-mentioned main band must be set really at radiolink immediately, and by this main band, not only above-mentioned " service band information ", in the scope that transmission capacity allows, " data message " (user data) of script also transmits.And then general " control information " (subscriber control information) can also be comprised in this main band.Solve each problem above-mentioned thus.
According to an aspect of the present invention, the invention provides a kind of communicator, this communicator is accommodated in by using the multicarrier transmission mode of multiple subcarrier to carry out each other in the communication system of information exchange at communicator, it is characterized in that, above-mentioned communicator comprises: send data generating section, this transmission data generating section is for generating the transmission data comprising service band information, and above-mentioned service band information indicates which the remaining frequency band that will use each other at above-mentioned communicator beyond specific frequency band; Wherein, above-mentioned communicator is configured to by using specific frequency band to send above-mentioned service band information, above-mentioned specific frequency band sets from the multiple frequency bands being assigned to this communication system, wherein, above-mentioned specific frequency band is made to pass through in time and can change, for switching to another frequency band in above-mentioned multiple frequency band.
According to a further aspect in the invention, a kind of communication system be accommodated in communication network is also provided, this communication system carries out information exchange by using the multicarrier transmission mode of multiple subcarrier each other at communicator, above-mentioned communicator comprises: send data generating section, this transmission data generating section is for generating the transmission data comprising service band information, and above-mentioned service band information indicates which the remaining frequency band that will use each other at above-mentioned communicator beyond specific frequency band; Wherein, above-mentioned communicator is configured to by using specific frequency band to send above-mentioned service band information, and above-mentioned specific frequency band sets from the multiple frequency bands being assigned to this communication system; Wherein, above-mentioned specific frequency band is made to pass through in time and can change, for switching to another frequency band in above-mentioned multiple frequency band.
Accompanying drawing explanation
Fig. 1 is the figure of the basic structure represented based on communicator of the present invention (transmitter side).
Fig. 2 is the figure of the basic structure represented based on communicator of the present invention (receiver side).
Fig. 3 is the figure of the object lesson represented based on communicator of the present invention (transmitter side) 10.
Fig. 4 is the figure of the object lesson represented based on communicator of the present invention (receiver side) 20.
Fig. 5 is the figure of the variation represented based on communicator of the present invention (transmitter side) 10.
Fig. 6 is the figure of the variation represented based on communicator of the present invention (receiver side) 20.
Fig. 7 is the figure of another variation represented based on communicator of the present invention (transmitter side) 10.
Fig. 8 is the figure of another variation represented based on communicator of the present invention (receiver side) 20.
Fig. 9 is the figure of the situation of the frequency division represented in communication system.
Figure 10 is the figure representing the situation that have selected 1 " main band " and " expansion frequency band " respectively.
Figure 11 is the figure of the 1st example of the method for salary distribution of the main band represented for multiple user.
Figure 12 is the figure of the 2nd example of the method for salary distribution of the main band represented for multiple user.
Figure 13 is the flow chart of the example representing the frequency band dynamically changing main band.
Figure 14 A and Figure 14 B is the figure of the apparatus structure example of the transmitter side representing pilot signal.
Figure 15 A and Figure 15 B is the figure returning the apparatus structure example of side of response (CQI) information represented for pilot signal.
Figure 16 is the figure of the 1st multiplexing example representing pilot signal.
Figure 17 is the figure of the 1st multiplexing example representing pilot signal.
Figure 18 is the figure of the dynamic modification that main band is concisely shown.
Figure 19 is the flow chart representing the expansion importing of frequency band and the 1st example of change.
Figure 20 is the flow chart representing the expansion importing of frequency band and the 2nd example of change.
Figure 21 is the flow chart representing the expansion importing of frequency band and the 3rd example of change.
Figure 22 is the figure of the dynamic modification that expansion frequency band is concisely shown.
Figure 23 is the flow chart of the example representing the both sides changing main band and expansion frequency band.
Figure 24 is the flow chart of the dynamic modification of the both sides that main band and expansion frequency band are concisely shown.
Figure 25 is the figure returning the apparatus structure example of side of response (CQI) information represented for pilot signal.
Figure 26 is the figure of the table of the high efficiency of transmission represented for illustration of service band information.
Figure 27 is the figure of the dynamic modification representing expansion frequency band.
Figure 28 is the figure of the 1st example representing frequency band expansion mode.
Figure 29 is the figure of the 2nd example representing frequency band expansion mode.
Figure 30 is the figure of the 3rd example representing frequency band expansion mode.
Figure 31 is the figure of the apparatus structure example of the communicator (transmitter side) representing the 10th execution mode.
Figure 32 is the flow chart of the action case represented in the device of Figure 31.
Figure 33 is the figure for illustration of the 11st execution mode.
Figure 34 is the figure of the main points of the prior art represented disclosed in patent documentation 1.
Figure 35 is the figure of the main points of the prior art represented disclosed in patent documentation 2.
Figure 36 is the figure of the main points of the prior art represented disclosed in patent documentation 3.
Figure 37 is the figure of the main points of the prior art represented disclosed in patent documentation 4.
Embodiment
First in order to understand as early as possible the present invention and with reference to accompanying drawing so that above-mentioned prior art (patent documentation 1 ~ 4) to be described.
Figure 34 is the figure of the main points of the prior art represented disclosed in patent documentation 1.This legend represents the distribution of a series of subcarrier carried out for user U1 and U2 in detail to the parallel compensate (epimere) of 7 user U1 ~ U7, hypomere as represented.Transverse axis is frequency.
The feature of native system is, is configured at by multiple carrier wave on the frequency band distributed at transmitter side continuously, splits multiple subcarrier be configured continuously according to user (U1 ~ U7).
Specifically, being such as located at the whole frequency band that can use in 1 communication system is 20MHz, and setting it has 250 subcarriers.Therefore the bandwidth of each subcarrier is 20 [MHz]/250=80 [kHz].And these 250 subcarriers of dynamic assignment use between multiple user (U1 ~ U7).
Now, be such as dynamically assigned to user A (U2) 50, to other user B (U1) 75, make to use the number of subcarrier to change.
Accompany therewith, service band becomes 50 × 80 [kHz]=4 [MHz] for user A, and become 75 × 80 [kHz]=6 [MHz] for user B, service band is variable according to each user.Now, if the subcarrier be assigned with is continuous print on the frequency axis.And, the segmentation variable-width of frequency band can also be made.
Figure 35 is the figure of the main points of the prior art represented disclosed in patent documentation 2.This figure is the figure of the distribution form representing shared control channel on frequency axis and data channel.
Control signal, in multi-carrier CDMA system, is transmitted special subcarrier and the special subcarrier of transfer of data (data channel) and is separated and set by native system.This shared control channel is expanded by intrinsic extended code.Therefore, when receiving this shared control channel, the specific subcarrier of demodulation, can reduce its signal transacting amount.
Figure 36 is the figure of the main points of the prior art represented disclosed in patent documentation 3.This figure represents the situation that the frequency band of the data channel in above-mentioned Figure 35 can change according to propagation distance (and the communication distance between base station).Wherein, transmitted power also carries out changing (large-in-little).
Native system sets the transmission speed of every 1 subcarrier to be fixing, the number distributing to the subcarrier of user can change, thus realize the system of the communication of variable velocity, when distance between base station and terminal is very near, while make the transmitted power of each subcarrier diminish, distribute more subcarrier, when it is distant, while make the transmitted power of each subcarrier become large, distribute less subcarrier.
In addition, the subcarrier on the one hand shared control channel being used is minority, distributes multiple subcarrier on the other hand to data communication channel (data channel), configures both being separated completely on the frequency axis.And, use the subcarrier that shared control channel is special, notify the quantity of center sub-carriers number and the subcarrier used distributing to the subcarrier of data channel from base station to mobile radio station.
Figure 37 is the figure of the main points of the prior art represented disclosed in patent documentation 4.This figure represents that the quality according to communication environments can change the situation of the bandwidth of each subcarrier.
Native system makes the total number of subcarrier be constant according to the situation of communication environments in wireless transmissions, changes the bandwidth of each subcarrier simultaneously.Such as make the frequency band of each subcarrier broaden when this propagation state degenerates.Thus, total transmit because the subcarrier that can not make changes, so transmission speed can be maintained constant regardless of the quality of communication environments.
The present invention, for solving each problem points above-mentioned had respectively by the prior art (patent documentation 1 ~ 4) illustrated by above-mentioned Figure 34 ~ Figure 37, is described in detail with reference to the accompanying drawings.
Fig. 1 is the figure of the basic structure represented based on communicator of the present invention (transmitter side),
Fig. 2 is the figure of the basic structure represented based on communicator of the present invention (receiver side).
In Fig. 1, cross reference number 10 represents communicator (transmitter side), and in Fig. 2, cross reference number 20 represents communicator (receiver side), and they are accommodated in identical communication system (mobile body communication system).And, as mentioned above, communicator 10 is for base station and communicator 20 is terminal, otherwise or it is also passable, can both the present invention be applied, but in order to better understanding, in the following description as long as no special explanation, just set the communicator 10 of transmitter side as base station, if the communicator of receiver side 20 is terminal.
First with reference to Fig. 1, service band selection/configuration part 15 uses selection function to select the service band that use between counterparting communications device 20 especially." service band information " If (frequency) based on this selection is imported into and sends data generating section 11, herein, the transmission data Dt (transmission) becoming to be integrated with transmission data (user data) Du (user) that should be transferred to communicator 20 is generated.Therefore send data Dt and comprise transmission data Du and service band information If, but in fact also containing other " communication control information " Ict (control).This information Ict is such as the information etc. of the information of the modulation system used about QAM etc. and the transmitted data amount of 1 time about transmission data Du.
Above-mentioned transmission data Dt is input to the multi-carrier transmission transmission processing portion 13 of next stage be applied in the modulation of regulation in modulation portion 12 after.By the set-up function of above-mentioned service band selection/configuration part 15, the band setting index signal Sb (band) that instruction should carry out transmission processing on above-mentioned selected service band is applied to this handling part 13, this handling part 13, in the frequency band based on this signal Sb, carries out the signal transmission processing according to multi-carrier transmission.
And then in radio section 14, frequency inverted is carried out for the transmission data-signal St from above-mentioned handling part 13, the signal after this conversion is sent from the antenna AT of next stage to counterparting communications device (terminal) 20.
On the other hand, with reference to Fig. 2, receive the wireless signal from above-mentioned antenna AT (Fig. 1) with antenna AT (Fig. 2), then in radio section 21, carry out frequency inverted, become and receive data-signal Sr, and input to multi-carrier transmission reception processing unit 22.In this handling part 22, the Signal reception process according to multi-carrier transmission is carried out to this reception data-signal Sr, and then the signal in the demodulation section 23 of next stage after this Signal reception process of demodulation.
Reception data Dr after this demodulation is decoded in reception data decoding part 24, the above-mentioned service band information If being separated into transmission data Du originally and being set before.And from this data Dr, also isolate above-mentioned communication control information Ict.Further, the part controlled by this information Ict is not owing to having in essence a direct relation with the present invention, and thus the description thereof will be omitted.
As mentioned above, from receive data Dr the service band information If of script that is isolated be input to service band configuration part 25.This configuration part 25 receives this information If to reproduce above-mentioned band setting index signal Sb.This signal Sb is applied to above-mentioned multi-carrier transmission reception processing unit 22, carries out the Signal reception process according to multi-carrier transmission in this handling part 22 in the frequency band selected by transmitter side.And, also at establishment radiolink originally, predetermined frequency band can be selected.
The present invention by above-mentioned band setting index signal Sb, and makes transmitter side (10) and receiver side (20) can use identical service band.And can expand simultaneously, reduce or change this service band in transmitter side (10) and receiver side (20) these both sides according to this signal Sb.Above-mentioned object of the present invention can be reached like this.
While carry out contrasting the basic structure specifically describing the invention described above on one side more a little with above-mentioned prior art.
In the present invention, the frequency band that can use in communication system entirety is divided into multiple frequency band.Such as, when the service band of this communication system entirety is 20 [MHz], is 5 [MHz] with a frequency band, is divided into four.The control channel using this frequency band 5 [MHz] to transmit to transmit service band information and each information to the transmission channel (data channel) that transmission data are transmitted.
According to the present invention, as mentioned above, to major general for transmitting the frequency band of this control channel as " main band ", also using by the frequency band expanded as " expansion frequency band ".If such as considered with ofdm communication system, each frequency band 5 [MHz] above-mentioned is then established to comprise 100 subcarriers, also set the bandwidth of each this subcarrier as 50 [kHz], use this 100 a series of subcarriers, carry out each information of transmitting control channel and data channel.The multiplexing method of two information can be that time-multiplexed, channeling or extended code are multiplexing.
As mentioned above, different from patent documentation 3 (No. 2004-214746, Japanese patent gazette JP), decode by receiving " main band " information, thus clear and definite service band (or quantity of service band), so can be easy to carry out service band expansion, reduce or change.And different with patent documentation 3 (No. 2004-214746, Japanese patent gazette JP) from patent documentation 1 (No. 9-205411, Japanese Unexamined Patent Publication) thus, the structure of acceptance division also becomes simple.
In addition, if the quantity of the subcarrier of each frequency band is constant, then the quantity with service band changes and the quantity of subcarrier is changed with ratio of integers.Therefore, if compare the patent documentation 3 (No. 2004-214746, Japanese patent gazette JP) of subcarrier dynamic change, then the structure of acceptance division becomes simple.
And, by specifying service band from base station to terminal in advance, thus can be easy to change and add above-mentioned expansion frequency band, the change of main band can also be carried out.
And then, if fix the bandwidth of each subcarrier as mentioned above, then as patent documentation 4 (No. 2002-330467, Japanese patent gazette JP), impact can not be brought on other users, can service band be changed.The following describes based on various execution mode of the present invention.
[execution mode 1: the setting of service band]
Some features disclosed in present embodiment 1 are shown first as follows.The main point of this feature, as by the agency of, is following 3 points (i) ~ (iii).
Specific frequency band is set i multiple frequency bands that () is formed from splitting the whole frequency band distributing to communication system, use this specific frequency band, whether will determine should at communicator mutual (10, 20) " service band information " If of certain frequency band remaining is used to transmit between, (ii) by " main band " that this specific band setting is in whole frequency band, this main band goes back transmitting data information (Du) except service band information If, (iii) using at least 1 frequency band setting among the frequency band outside above-mentioned " main band " of the removing of above-mentioned multiple frequency band as " expansion frequency band ", this expansion frequency band is mainly used in transmitting further data message (Du).
Then, in present embodiment 1 in addition disclosed some main points be below four point (iv) ~ (vii) in.
(iv) above-mentioned " main band " is when communicator establishes radiolink between (10,20) mutually, arranges regularly,
V (), when communicator (20) has multiple, to each setting " main band " respectively in above-mentioned multiple frequency band, and distributes main band corresponding to each of these multiple communicators (20) respectively.
(vi) communicator (20) of more than 2 is by time-multiplexed and/or extended code is multiplexing uses identical " main band " simultaneously,
(vii) quantity of expansion frequency band in addition, is increased and decreased according to the required transmission speed of data message (Du).
Fig. 3 is the figure of the concrete example represented based on communicator of the present invention (transmitter side) 10,
Fig. 4 is the figure of the concrete example represented based on communicator of the present invention (receiver side) 20.And in all figure, all give same cross reference number to identical inscape or mark represents.In addition, the object lesson shown in Fig. 3 and Fig. 4 is not limited to present embodiment 1, also can jointly apply in other execution modes 2 ~ 10 described later.
First with reference to the communicator (transmitter side) 10 of Fig. 3, give their cross reference number or mark 11 ~ 15 and Du, Dt, St, Sb to the part corresponding to the inscape 11 ~ 15 shown in Fig. 1 and Du, Dt, St, Sb and represent.
Send data generating section 11 according to the example of this figure, be made up of data block preparing department 31, coding unit 32, transmitted data amount calculating part 33, coding unit 34 and multiplexing unit (Mux) 35.
According to the service band information If from above-mentioned service band selection/configuration part 15, first calculate transmission data length by transmitted data amount calculating part 33, in data block preparing department 31, collect for data block according to each transmission data length.And then use this transmission data length in coding unit 32, carry out transmitting the coding of data.
Encoded in coding unit 34 together with the communication control information Ict of the modulation system that above-mentioned service band information And if expression use etc.And coding unit 32 and 34 also can be collected Du and If to encode as 1 coding unit.
Each coding from two coding unit 32 and 34 exports and is re-used in multiplexing unit (Mux) 35, becomes above-mentioned transmission data Dt.This data Dt is also described above modulated in modulation portion 12.As the method that this is multiplexing, the channeling having partition subcarriers to carry out using, time-multiplexed (such as using the frame formatting shown in Figure 16) and extended code are multiplexing.Modulation system in addition as modulation portion 12 has QPSK, 16QAM, 64QAM etc.
Then, about multi-carrier transmission transmission processing portion 13, in the example shown in this figure, be made up of inscape 36,37,38,39 and 40.Wherein, the example premised on the communication of OFDM is indicated.Other example premised on the communication of MC-CDMA is as shown in Fig. 7 (Fig. 8).
In separation unit (DeMux) 36, be separated into the information belonging to " main band " and the information belonging to " expansion frequency band ".After the information belonging to " main band " is converted to parallel signal in serial/parallel conversion portion (S/P) 37, in inverse fast Fourier transform portion (IFFT) 38, T/F conversion is being carried out to this parallel signal.The parallel signal being converted to this frequency is converted to serial signal again in parallel/serial conversion unit (P/S) 39.And then in protection interval (GI) insertion section 40, the protection interval GI for preventing inter symbol interference is inserted to this serial signal.
The transmission data-signal St obtained like this is input to radio section 14.This radio section 14, according to the example of this figure, is made up of (eliminating D/A inverter and filter etc.) general frequency mixer 41, local oscillator 42, power amplifier 44, sends this transmission data-signal St by antenna AT.Now, adder 43 is arranged on the way.
Adder 43 is as mentioned above to the information belonging to above-mentioned " expansion frequency band " separated in separation unit (DeMux) 36, the process same with the process of " main band " of above-mentioned inscape 37,38,39,40,41 and 42 is implemented by inscape 37 ', 38 ', 39 ', 40 ', 41 ' and 42 ', obtain the transmission data-signal St of " expansion frequency band " side, become to be integrated with the transmission data-signal St of above-mentioned " main band " side.
Whether the transmission data of above-mentioned " expansion frequency band " side only generate when needing the transfer of data of " expansion frequency band ", be necessary, determined by the inside of the band setting index signal Sb from above-mentioned selection/configuration part 15.
Then with reference to Fig. 4, the part corresponding to the inscape 21 ~ 25 shown in Fig. 2 and Sr, Dr, Du, If, Sb has been endowed their cross reference number and mark 21 ~ 25 and Sr, Dr, Du, If, Sb and has represented.
Radio section 21 is according to the example of this figure, unwanted band signal in the Received signal strength removing from antenna AT by band pass filter (BPF) 51, be converted to required receive frequency by frequency mixer 52 and local oscillator 53, thus obtain receiving data-signal Sr.
This reception data-signal Sr is imported into multi-carrier transmission reception processing unit 22 and processes.This handling part 22, according to the example of this figure, is made up of illustrated inscape 54,55,56,57 and 58.
First in protection interval (GI) removing unit 54, the protection interval of inserting at transmitter side is removed.Signal after GI removes is converted to parallel signal by serial/parallel conversion portion (S/P) 55 again, in fast Fourier transform portion (FFT) 56, carry out frequency-time conversion to this parallel signal.Through this time, the parallel signal of conversion is converted to serial signal again in parallel/serial conversion unit (P/S) 57.
On the other hand, when having the information belonging to " expansion frequency band " in the Received signal strength from antenna AT, the signal of this " expansion frequency band " information is extracted by frequency mixer 52 ' and local oscillator 53 ', carry out the process same with the process of above-mentioned inscape 55 ~ 57 by identical inscape S/P55 ', FFT56 ' and P/S57 ', become the serial signal that have passed through time conversion.
Each serial signal from above-mentioned parallel/serial conversion unit 57 and 57 ' is re-used in multiplexing unit (Mux) 58, then demodulated in demodulation section 23.And when only sending the information belonging to " main band ", above-mentioned multiplexing unit 58 is not carried out multiplexing, and only makes signal pass through.
Signal from multiplexing unit 58 becomes reception data Dr demodulated in the demodulation section 23 of next stage, is input to afterwards and receives data decoding part 24.This lsb decoder 24, according to the example of this figure, is made up of separation unit (DeMux) 59, data channel lsb decoder 60, control channel lsb decoder 61 and transmitted data amount calculating part 62.
Reception data Dr is separated into data channel side data and control channel side data by above-mentioned separation unit 24, distributes to lsb decoder 60 and lsb decoder 61 respectively.From lsb decoder 60 according to transmitted data amount described later, reproduce transmission data Du originally.On the other hand, " service band information " If is reproduced from lsb decoder 61.
Above-mentioned information If mono-aspect from lsb decoder 61 inputs to transmitted data amount calculating part 62, calculates the data length receiving transmission data herein, carry out the decoding of the transmission data of above-mentioned lsb decoder 60 according to this data length according to this If.
Above-mentioned information If from lsb decoder 61 is given to above-mentioned service band configuration part 25 on the other hand, generates above-mentioned band setting index signal Sb at this.Then according to the content of this signal Sb, the setting corresponding with selected frequency band is carried out to respective circuit part (22,58,59) in the path of illustrated dotted line.And the structure of the reception data decoding part 24 of Fig. 4 also can receive after data Dr decodes starting most to have input a lsb decoder (sharing of lsb decoder 60 and 61), is separated into data channel and control channel in separation unit 59.
In the structure of above-mentioned Fig. 3 and Fig. 4, the frequency band of " main band " is fixing, only has the frequency band of " expansion frequency band " variable.But in certain execution mode of the present invention not only " expansion frequency band ", the frequency band of " main band " is also variable.The structure example realized shown in figure.
Fig. 5 is the figure of the variation represented based on communicator of the present invention (transmitter side) 10,
Fig. 6 is the figure of the variation represented based on communication control unit of the present invention (receiver side) 20.
The difference of the structure shown in the structure shown in these Fig. 5 and Fig. 6 and above-mentioned Fig. 3 and Fig. 4 is, the indicating range of the band setting index signal Sb from service band selection/configuration part 15 in Fig. 5 is not only " expansion frequency band " side (37 ' ~ 42 ') (situation of Fig. 3), also relates to " main band " side (37 ~ 42).And in figure 6, indicating range from the band setting index signal Sb of service band configuration part 25 is not only " expansion frequency band " side (52 ' ~ 57 ') (situation of Fig. 4), also relates to " main band " side (52 ~ 57).Like this, the frequency band of " main band " can also be changed.
In addition, carry out premised on the explanation of the above-mentioned concrete example communication under OFDM, but outside also can with the communication of MC-CDMA as prerequisite.When this latter, an example of the communicator on (MC-CDMA basis) represents herein.
Fig. 7 is the figure of another variation represented based on communicator of the present invention (transmitter side) 10.
Fig. 8 is the figure of another variation represented based on communicator of the present invention (receiver side) 20.
Such as more above-mentioned Fig. 5 and Fig. 6 and this Fig. 7 and Fig. 8, in transmitter side (10), the structure in multi-carrier transmission transmission processing portion 13 is different, and in receiver side (20), the structure of multi-carrier transmission reception processing unit 22 is different.
That is, in the handling part 13 shown in Fig. 7, difference is that use copies portion (Copier) 46 and multiplier 47.In addition, in the handling part 22 shown in Fig. 8, difference is to use multiplier 65 and combining unit (∑) 66.
First use Fig. 7 that sending action is described.Modulate the transmission data generated, copy according to the quantity of subcarrier in the portion of copying (Copier) 46.By extended code (C1, C2 in multiplier 47 ... Cn) signal that this copies is multiplied by.This result is carried out in IFFT portion (38,38 ') IFFT come time of implementation-frequency inverted.Then, in GI insertion section 40, after inserting GI, carry out frequency inverted, and send with antenna AT.In addition, based on the service band selected in service band selection portion 15, change the setting in multi-carrier transmission transmission processing portion 13.
Next, about receiving action, use Fig. 8 to be described.First frequency inverted Received signal strength obtains base band, in GI removing unit 54, remove GI.Then, carry out serial/parallel conversion (55,55 '), in multiplier 65, be multiplied by extended code (C1, C2 separately ... Cn) despreading is carried out.In FFT portion (56,56 '), FFT is carried out to this result, carried out frequency-time conversion after get in combining unit 66 and.In this result of demodulation section 23 demodulation.Carry out process similar to the above afterwards, extract service band information If.Then, based on this service band information If extracted, change the setting of multi-carrier transmission reception processing unit 22.And, in figures 7 and 8, when changing service band, make the number of codes n of frequency expansion variable.When use MC-CDMA described above, comparing with OFDM can simplification device structure.But then, make counting of FFT and IFFT can the needs of dynamic change owing to producing, so make control become numerous and diverse.
Below while the configuration structure of reference frequency band is while further illustrate present embodiment 1.
In the communication system of changed service band using OFDM etc., with specific frequency band transmission service band information If.Then, by the specific frequency band of demodulation code, service band information If can be obtained.By this information If, the communication under expanded frequency band can be carried out.As its prerequisite, in the present invention, carry out the segmentation of whole frequency band as follows.
Fig. 9 is the figure of the situation of the frequency division represented in communication system.The a series of subcarrier of this figure represents the whole frequency band distributing to communication system.Then this whole frequency band is divided into multiple frequency band.This figure represents the example being divided into 4 parts, is divided into four frequency bands, i.e. " frequency band 1 ", " frequency band 2 ", " frequency band 3 ", " frequency band 4 ".That then selects in these " frequency bands 1 " ~ " frequency band 4 " is some as above-mentioned " main band ", then the frequency band outside selecting is as above-mentioned " expansion frequency band ".
Figure 10 is the figure representing the situation selecting " main band " and " expansion frequency band " respectively.Such as select above-mentioned frequency band 1 as " main band ", such as select above-mentioned frequency band 2 as " expansion frequency band ".As mentioned above, " main band " distributes to the transmission of control channel (CH) and data channel (CH), and " expansion frequency band " distributes to the transmission of further data channel.Such as determine by base station or its upper base-station control apparatus the main band that certain terminal uses.Otherwise or also can, from end side, main band is specified to base station side.
Above-mentioned main band also can be fixed as communication system in advance, or also can set when communicator is established wireless between (base station and terminal) mutually, fixes this setting until this sign off.
And then communicator (user terminal) can also be worked as when having multiple, set the different main band according to each user terminal.This situation is represented in figure.
Figure 11 is the figure of the 1st example of the method for salary distribution of the main band represented for multiple user.
Figure 12 is the figure of the 2nd example of the method for salary distribution of the main band represented for multiple user.And this method of salary distribution can be applied to expansion frequency band.
First with reference to Figure 11, to each main band of distributing each user U1 ~ U4 respectively of multiple frequency band, i.e. frequency band 1 ~ frequency band 4.Wherein, now limited subscriber number is carried out by the quantity of frequency band.
So as shown in figure 12, same main band is distributed to multiple communicator (user terminal) simultaneously.It can be undertaken by user is multiplexing.As this multiplexing method, have time-multiplexed multiplexing with extended code, or also can carry out multiplexing in conjunction with them.
And then in present embodiment 1, according to the required transmission speed of data message (transmission data Du), service band (frequency band 1 ~ frequency band 4) can be increased and decreased.
That is, in a base station, considering the communication conditions of the other-end communicated, communication environments and service band etc., when being judged as using other frequency bands, carrying out the expansion of service band.And, when expanding, the expansion of frequency of utilization also preferentially can be carried out according to the transmission data attribute (QoS:QualityofService) of the priority of the communication of terminal room and required transmission speed etc.
Like this, because service band information If is transmitted in specific frequency band (main band), as long as so first receiver side receives this main band, do not need to receive other frequency bands to carry out demodulation code.And, by using expansion frequency band, further can improve the speed of transmission speed, the improvement of efficiency of frequency employment can be realized.
[the 2nd execution mode: the dynamic change of main band]
Following expression is some features disclosed in this 2nd execution mode at first.
I) frequency band that in multiple frequency band (frequency band 1 ~ frequency band 4), main band should be occupied is made to pass through in time and can change,
Ii) judge the quality of the communication environments between communicator (10,20), the frequency band selecting communication environments best among above-mentioned multiple frequency band or the frequency band being equivalent to best communication environments to be set as main band,
Iii) when new settings main band, the change of this frequency band is notified in advance to counterparting communications device,
Iv) between communicator, use the testing result of the transmission quality (CQI) obtained in response to the pilot channel sent or pilot signal, judge the quality of above-mentioned communication environments,
V) judgement of the quality of this communication environments is carried out successively or simultaneously to all above-mentioned multiple frequency bands,
Vi) in the control channel also under specific frequency band, the judged result of the quality of this communication environments is transferred to counterparting communications device.
Usually, the transmission characteristic of control channel compares data channel, and its transmission quality one is reserved.First, the circuit that should transmit data must reliably be set.That is, the transmission quality wanting the main band making to comprise control channel is better than expansion frequency band, needs to select the better frequency band of communication environments.So the quality illustrating according to communication environments selects the object lesson of the frequency band being set as main band freely.
Figure 13 is the flow chart of the example representing the frequency band dynamically changing main band.And, the same illustrated by the 1st execution mode described above of the basic transmitting-receiving action between base station with terminal.In addition in this Figure 13, the block of solid line represents that the action of base station, the block of dotted line represent the action of terminal respectively respectively.But they are expressed as also have no relations on the contrary (for other flow charts described later too).
Step S11: send pilot frequency channel signal at each frequency band.
Step S12: receive all pilot frequency channel signals,
Step S13: calculate each SNR etc. and be converted to CQI,
Step S14: each CQI is transmitted in ascending control channel.
Step S15: receive each CQI,
Step S16: choice for use frequency band, and the change timing determining frequency band,
Step S17: transmit selected service band and determined change timing in down control channel.
Step S18: receive above-mentioned service band and change timing,
Step S19: change the setting in each circuit part according to above-mentioned change timing,
Step S20: use the main band after this change to start receiving action.
And above-mentioned SNR is SignaltoNoiseRatio (signal to noise ratio), CQI is ChannelQualityIndicator (CQI).And be recorded in TS25.212Release5 of 3GPP (3rdGenerationPartnershipProjecthttp: //www.3gpp.org/) etc. about the definition of CQI, and their specification is registered in http://www.3gpp.org/ftp/Specs/html-info/25-series.htm.
Indicate in Figure 13 an example, for making main band pass through and variable process in time according to above-mentioned flow chart, can such as be realized by apparatus structure so below.
Figure 14 A and 14B is the figure of the apparatus structure example of the transmitter side representing pilot signal.
Figure 15 A and 15B is the figure returning the apparatus structure example of side of response (CQI) information represented for pilot signal.
Structure shown in Figure 14 A with 14B is identical in fact with the structure of above-mentioned Fig. 3 (or Fig. 5), the key element that should newly pay close attention to is the pilot signal Sp (or pilot channel) of this figure left end and carries out multiplexing multiplexing unit (Mux) 71 to this pilot signal Sp and service band information If, and, also have the CQI extraction unit 72 of the latter half of this figure.The structure of this latter half is identical in fact with the structure of above-mentioned Fig. 4 (or Fig. 6), and the inscape that should newly pay close attention to is the CQI extraction unit 72 on the downside of this figure central authorities.And in the latter half of this figure, part corresponding is in the diagram to the cross reference number 52,53,54 employed in the diagram ... additional 100, be expressed as 152,153,154 ...
Structure shown in Figure 15 A with 15B is identical with the structure of above-mentioned Fig. 4 (or Fig. 6) in addition, the inscape that should newly pay close attention to is SNR determination part 75, the CQI calculation unit 76 of this figure the first half, also has the coding unit 78 via this figure the latter half after reentrant pathway 77 and adder 79.And in this figure the first half, part corresponding in Fig. 4 (receiver side) uses the cross reference number 52,53,54 employed in Fig. 4 ... represent, also the cross reference number 12,37,38 employed in Fig. 3 is used to part corresponding in Fig. 3 (transmitter side) in the latter half of this figure ... additional 100, be expressed as 112,137,138 ...
Above-mentioned pilot signal Sp is transmitted with other transmission information multiplexing in practice.This multiplexing method such as has following 2 kinds.
Figure 16 is the figure of the 1st multiplexing example representing pilot signal.
Figure 17 is the figure of the 2nd multiplexing example representing pilot signal.And in two figure, " P " represents pilot signal Sp, " C " represents above-mentioned communication control information Ict, and " D " represents above-mentioned transmission data Du.
Figure 16 represents the situation of pilot signals Sp on time orientation, and on the other hand, Figure 17 represents the situation of pilot signals Sp on the both sides of time orientation and frequency direction.
Figure 18 is the figure of the dynamic modification of the main band that above-mentioned 2nd execution mode is concisely shown.Downwards upper through from this figure of time.With this time process, main band follows better communication environments, such as, change according to the mode of " frequency band 1 " → " frequency band 2 " → " frequency band 1 " → " frequency band 4 ".
As mentioned above, base station is in all frequency bands applied, and the multiplexing signal (pilot tone) for measuring communication environments is used as control channel transmission.And in practice, be also susceptible to the situation not comprising transmission data Du.Pilot signal Sp can also be replaced to arrange pilot channel.
Terminal is about all frequency bands (frequency band 1 ~ frequency band 4), receive pilot frequency channel signal, measurement example is as the reception situation of SNR and CIR (CarriertoInterferenceRatio: Carrier interference ratio) etc. and communication environments, above-mentioned CQI is calculated according to this measured value, use ascending control channel, according to each frequency band successively or simultaneously to base-station transmission.And, also former state can transmit the measurement result of above-mentioned CIR and SNR etc.
Receiving ascending control channel signal, CQI being carried out to the base station of demodulation code is main band by the frequency band selection with CQI value best in multiple CQI.The change of this selection result and main band timing is equipped on down control channel and is transferred to terminal.
Terminal receives this downlink channel control signal and carries out demodulation code, and extracts service band and change each information regularly.Then, the change of service band is carried out according to this change timing.And, change timing and also can such as be determined by absolute time, relative time or time slot units.And, can not also transmit and change timing, by delay from the transmission of downlink channel control signal after 5 time slots, carry out system and fix.
Above-mentioned middle be main band by frequency band selection best for communication environments, but also consider the situation cannot selecting best frequency band due to the situation of other-end.In this case the can select to be equivalent to it the 2nd good frequency band.
And this is in the selection that base station one side carries out main band, but frequency band communication environments can also being selected similarly best in terminal comes to base-station transmission.
The mensuration of SNR and CIR in terminal etc. is described above, to each frequency band Simultaneously test, also can separate setting according to the time.And, under the situation that the frequency band that bandwidth is narrower waits continuously, because communication environments can not significantly change, so this situation only can measure a frequency band.Further, this measured value can be measure the mean value after certain hour.
In addition, in the 1st execution mode, describe expansion frequency band only send transmission data Du, but in order to measure the communication environments of each frequency band, also can also send pilot channel or pilot signal except transmission data Du.
In the above description, describe the transmission to terminal from base station, but can be suitable for too from terminal to the transmission of base station on the contrary.
As mentioned above, usually the transmission characteristic of control channel must be better in its transmission quality than the transmission characteristic of data channel.So the main band comprising control channel needs to select the good frequency band of communication environments, but by above-mentioned action, can be main band by the frequency band selection being positioned at best communication environments.And, even if communication environments passes through and change in time, can be also main band by the frequency band selection being positioned at best communication environments all the time.
Thus, not only reduce the error of transmission of control channel information, be also easy to the device setting carrying out receiver side, and can also transmission quality be improved.And then, result from the data transmission times again of error of transmission owing to reducing, so can make transmission speed more at a high speed.
And then, be set as variable due to main band, so the inequality of the behaviour in service (load) between frequency band can be avoided, the improvement of frequency usage efficiency can be realized.
[execution mode 3: the dynamic change of expansion frequency band]
Some features disclosed in this 3rd execution mode are shown first as follows.
I) frequency band being set as in multiple frequency band (frequency band 1 ~ frequency band 4) expanding frequency band is made to pass through in time and can change,
Ii) judge the quality of the communication environments between communicator (10,20), select the frequency band being equivalent to best communication environments among above-mentioned multiple frequency band to be set as expanding frequency band.
Iii) and establish radiolink time, limit this communicator (10,20) operable frequency band, in the frequency band that this limits dynamic assignment main band and expansion frequency band.
Iv) also in advance should be set as to counterparting communications device notice the set information of frequency band expanding frequency band, perform expansion,
V) receive the associated frequency band set information of the frequency band can expanded or can change from counterparting communications device, carry out the change expanding frequency band or main band,
Vi) the change timing information of the timing about this change is also received.
Vii) to the judged result of the quality of counterparting communications device transmission communication environments in the control channel also under specific frequency band,
Viii) between communicator (10,20), use the testing result of the transmission quality (CQI) returned in response to the pilot channel sent or pilot signal, judge the quality of communication environments,
Ix) according to this communicator can frequency of utilization, the quality of communication environments, the behaviour in service of each frequency band and data message (Du) under each frequency band required transmission speed among at least 1 judge the expansion setting of frequency band or the necessity of change
X) when the expansion frequency band that new settings is above-mentioned, the change of this frequency band is notified in advance to counterparting communications device.
Figure 19 is the flow chart representing the expansion importing of frequency band and the 1st example of change.
Figure 20 is the flow chart representing the expansion importing of frequency band and the 2nd example of change.
Figure 21 is the flow chart representing the expansion importing of frequency band and the 3rd example of change.
Specifically, Figure 19 represents and uses terminal can the CQI of service band and each frequency band control flow when selecting expansion frequency band.In addition Figure 20 represent use this can service band, each frequency band behaviour in service and transmission data required transmission speed select expand frequency band when control flow.And Figure 21 represent use terminal can service band, the CQI of each frequency band, the behaviour in service of each frequency band and transmission data required transmission speed select expand frequency band when control flow.
In Figure 19,
Step S21: sending can service band.
Step S22: receiving this can service band,
Step S23: use this can service band, sends pilot frequency channel signal.
Step S24: receive all pilot frequency channel signals, then calculates each SNR etc. and is converted to CQI,
Step S25: transmit above-mentioned each CQI in ascending control channel.
Step S26: receive above-mentioned each CQI,
Step S27: select the need of expansion according to this CQI, determines that it changes timing while selecting expansion frequency band,
Step S28: transmit this expansion frequency band and change timing in down control channel.
Step S29: receive above-mentioned expansion frequency band and change timing,
Step S30: the setting changing each circuit part according to this change timing,
Step S31: start receiving action in the expansion frequency band after this change.
Then in fig. 20,
Step S41: sending can service band.
Step S42: receive above-mentioned can service band,
Step S43: confirm the behaviour in service of each frequency band and the required transmission speed of transmission data Du,
Step S44: select the need of expansion, determines that it changes timing while selecting expansion frequency band,
Step S45: transmit this expansion frequency band and change timing in down control channel.
Step S46: receive above-mentioned expansion frequency band and change timing,
Step S47: the setting changing each circuit part according to this change timing,
Step S48: start receiving action in the expansion frequency band after this change.
Then in figure 21,
Step S51: sending each can service band.
Step S52: receiving this can service band,
Step S53: pilot frequency channel signal can be sent in service band at this.
Step S54: receive all pilot frequency channel signals, then calculates each SNR etc. and is converted to CQI,
Step S55: transmit above-mentioned each CQI in ascending control channel.
Step S56: receive above-mentioned each CQI,
Step S57: confirm the behaviour in service of each frequency band and the required transmission speed of transmission data Du,
Step S58: select the need of expansion, determines that it changes timing while selecting expansion frequency band,
Step S59: transmit this expansion frequency band and change timing in down control channel.
Step S60: receive above-mentioned expansion frequency band and change timing,
Step S61: the setting changing each circuit part according to this change timing,
Step S62: start receiving action in the expansion frequency band after this change.
In this 3rd execution mode, the dynamic change of expansion frequency band is described.Generally when setting circuit (when radiolink is established), the operable frequency band of this terminal is transmitted from terminal to base station (or base-station control apparatus).Here it is, and above-mentioned terminal can service band.And, imagine and this can service band situation about notifying be described, also consider and be previously determined the situation of service band etc. can not carry out the situation that notifies as communication system.
In the same manner as the situation of above-mentioned 2nd execution mode, base station receives pilot signal Sp, terminal by the above-mentioned CQI transmission that calculates based on the pilot signal Sp received by this to base station.Then, base station consider terminal can service band, the CQI of each frequency band that terminal transmission is come, other-end behaviour in service, carry out the required transmission speed etc. of the data Du transmitted, judge whether the expansion (change of service band number) needing this terminal to be carried out to frequency band.
Frequency band is selected when expanding.And then, select above-mentioned change timing during expansion service band.Then in control channel, transmit selection information and the above-mentioned change timing of this expansion frequency band.The terminal receiving this control channel signal, by about expanding the information of frequency band and changing based on timing, changes the setting of each circuit part in terminal, starts the reception under this expansion frequency band afterwards.
Above-mentioned action is remarked additionally.Wherein with reference to the control flow of above-mentioned Figure 21.First terminal is to base station or its upper base-station control apparatus etc., sends the operable frequency band of this terminal.The base station receiving this frequency band sends pilot frequency channel signal or pilot signal Sp in operable frequency band.And, do not need choice for use frequency band when sending pilot frequency channel signal in the shared channel shared in terminal.
The terminal that have received via the pilot frequency channel signal of each frequency band calculates above-mentioned CQI, to this CQI calculated value of base-station transmission in ascending control channel based on above-mentioned CIR and SNR etc.The QoS of the behaviour in service of CQI and each frequency band and the required transmission speed of transmission data Du etc. is considered in the base station receiving this value, select the need of expansion, the choice for use frequency band when expanding, and the change timing etc. determining this frequency band, inform terminal by down control channel.
The terminal receiving these information, according to each circuit part of above-mentioned change timing setting or setting terminal again, receives in the expansion frequency band after above-mentioned change timing after this change.
Figure 22 is the figure of the dynamic modification of the expansion frequency band that this 3rd execution mode is concisely shown.Downwards upper through for from this figure of time.Along with this time process, expansion frequency band selects to be equivalent to the good frequency band of the best frequency band of communication environments, on one side when generation expansion needs at every turn according to figure in the mode of illustrative " frequency band 2 " → " frequency band 2+ frequency band 3+ frequency band 4 " set.Multiple band setting can also be combined for expansion frequency band as the latter.
Like this, even if go up the communication environments of change for the time, can be also expansion frequency band by good for communication environments frequency band selection.Thus, the error of transmission of control channel information reduces, and the device being easy to carry out receiver side measures, and can improve transmission quality.And then, due to the transmission times again of data can be reduced, so can transmission speed be improved.Also consider to be used for the processing time in receiver side correction setting, notify to the other side the change expanding frequency band by prior, thus be easy to change above-mentioned setting to device.
[the 4th execution mode: the dynamic change of main band and expansion frequency band]
Originally the feature disclosed in the 4th execution mode is shown first below.
I) these both sides of frequency band that the expansion frequency band in the frequency band making the main band in multiple frequency band (frequency band 1 ~ frequency band 4) occupy and the plurality of frequency band should occupy when not overlapping each other in time through and can change,
Ii) 1 main band and at least 1 expansion frequency band can also be changed simultaneously.
Figure 23 is the flow chart of the example representing the both sides changing main band and expansion frequency band.
In detail in this figure,
Step S71: sending can service band.
Step S72: receiving this can service band,
Step S73: use this can service band, sends pilot frequency channel signal.
Step S74: receive all pilot frequency channel signals, calculates each SNR etc. and changes to CQI,
Step S75: transmit above-mentioned each CQI in ascending control channel.
Step S76: receive above-mentioned each CQI,
Step S77: select the frequency band that main band, i.e. communication environments are best,
Step S78: select the secondary good frequency band of expansion frequency band, i.e. communication environments again,
Step S79: transmit above-mentioned expansion frequency band and its change timing in down control channel,
Step S80: select this change timing.
Step S81: receive above-mentioned expansion frequency band and change timing,
Step S82: the setting changing each circuit part according to this change timing,
Step S83: start receiving action in the expansion frequency band after this change.
The control flow of Figure 23 is remarked additionally, herein, if transmission speed selects 1 main band and expansion frequency band (with reference to Figure 24) respectively needed for transmission data Du.Based on above-mentioned CQI in each frequency band that terminal transmission is come, be main band by frequency band selection best for communication environments.Then be expansion frequency band by the frequency band selection of communication environments time good (second best).Then select to change timing, via control channel, they are transferred to the other side.
The terminal receiving service band information (main band and expansion frequency band both sides) and change timing information, after changing the setting of receiver side circuit part according to this change timing, receives the signal of main band and these both sides of expansion frequency band.
Figure 24 is the flow chart of the dynamic modification of the both sides that main band in present embodiment 4 and expansion frequency band are concisely shown.Downwards upper through for from this figure of time.As illustrated in this figure, be set to " frequency band 1 " → " frequency band 1 " → " frequency band 3 " → " frequency band 2 " along with main band, certain side of the left and right (left side of this figure or right side) of expansion frequency band and this main band is set in couples.Wherein, two frequency bands are without the need to paired all the time, such as be conceived to the third level in figure, also the situation that there is not this expansion frequency band (frequency band 4) is had, and be such as conceived to the fourth stage in figure, this expansion frequency band also can spaced apartly be present in the frequency band 4 of its right adjacent, instead of in illustrated frequency band 3.
As mentioned above, can be that best and secondary good frequency band is as main band and expansion frequency band using communication environments.In addition, even if the variation of communication environments time of origin, also can be that best and secondary good frequency band is chosen as main band and expansion frequency band respectively by communication environments.
Thus, in the same manner as above-mentioned execution mode, the error of transmission of control channel information reduces, and is easy to the device setting carrying out receiver side, and can improves transmission quality.And then, due to the transmission times again of data also can be reduced, so can transmission speed be improved.Also consider to be used for the processing time in receiver side correction setting, by the prior change notifying main band and expansion frequency band to the other side, thus be easy to modifier setting.
[the 5th execution mode: select main band and expansion frequency band according to communication environments]
First feature disclosed in this 5th execution mode is represented.
I) quality that multiple frequency band (frequency band 1 ~ frequency band 4) each carries out the communication environments between communicator (10,20) is respectively judged, this judged result is transferred to counterparting communications device respectively according to each frequency band,
Ii) or to the quality that multiple frequency band (frequency band 1 ~ frequency band 4) each carries out the communication environments between communicator (10,20) respectively judge, respective judged result multiplexing collecting about all frequency bands is transferred to counterparting communications device
Iii) to use in main band, expansion frequency band and the better frequency band of communication environments some transmits above-mentioned judged result to counterparting communications device.
The structure example of above-mentioned Figure 15 can be used to implement this 5th execution mode, or the structure example of Figure 25 can be used.
Figure 25 is the figure returning the apparatus structure example of side of response (CQI) information represented for pilot signal.The structure example of this figure and the structure example of above-mentioned Figure 15 are similar to, and its difference is, is each corresponding indivedual process with multiple frequency band in the latter half of Figure 15, and are configured in the latter half of Figure 25 carry out multiplexingly collecting process to each CQI of multiple frequency band.That is, in a control channel, send transmission quality (CQI) to the other side in fig. 25, multiplexing unit (Mux) 80 is imported into the outlet side of reentrant pathway 72 for this reason.
In the respective embodiments described above, by the CQI of each frequency band from terminal transmission to base station time, can transmit in the ascending control channel of each frequency band, such as can also transmit each CQI of all frequency bands in the ascending control channel of main band.
When using the ascending control channel transmission CQI of each frequency band, use the structure example of Figure 15.And, in this structure example, uplink transmission data Du is not described, but also can by this data Du multiplexing transmission to control channel.And this structure example contemplates the situation multiple frequency band being received to pilot frequency channel signal simultaneously.
In the terminal shown in Figure 15, receive the signal of each frequency band, carry out frequency inverted corresponding to respective frequency band.Remove GI in GI removing unit 54 afterwards, carry out frequency-time conversion by S/P portion 55, FFT portion 56 and P/S portion 57, demodulation in demodulation section 23 afterwards.After using the propagation state of this signal measuring SNR and CIR etc., calculate CQI value.
The above-mentioned CQI value calculated according to each frequency band is transmitted respectively in the control channel of respective frequency band.Now, other control channel signal can also be transmitted in the lump.Uplink transmission data can also be transmitted in the lump.
The above-mentioned CQI calculated enters in the latter half of Figure 15 in reentrant pathway 77, is encoded in coding unit 78, after having carried out modulation, carries out T/F conversion by S/P portion 137, IFFT portion 138 and P/S portion 139 in modulation portion 112.Then in GI insertion section 140, insert GI, be converted to corresponding frequency band respectively and sent by antenna AT.
As mentioned above, in the same manner as above-mentioned execution mode, can to the CQI of each frequency band of base-station transmission (status transmission).In addition, based on the CQI (status transmission) that can send here by terminal, be main band by frequency band selection good for communication environments.Similarly, can be expansion frequency band by good for communication environments frequency band selection.Like this, same with above-mentioned execution mode, transmission characteristic can be improved by selecting better frequency band, also owing to decreasing the number of times again sent of data, so also can transmission speed be improved.
Next about the situation using the ascending control channel of specific frequency band to transmit all CQI, the structure example of above-mentioned Figure 25 is adopted.Use the situation of ascending control channel identical with above-mentioned according to each frequency band, calculate the CQI under each frequency band.These result of calculations being collected in above-mentioned multiplexing unit (Mux) 80 is after one, encodes in coding unit 78.Then, carried out modulation in modulation portion 112 after, carried out T/F conversion by S/P portion 137, IFFT portion 138 and P/S portion 139, then in GI insertion section 140, inserted GI.Carry out frequency inverted by circuit 141,142 afterwards and send from antenna AT.
And the frequency band for the transmission of used CQI can be chosen as the good main band of transmission environment, can also select the frequency band of transmission environment best (CQI is best), can also select other frequency bands.In addition, the frequency band be set in advance as communication system can also be used.
As mentioned above, in the same manner as above-mentioned execution mode, can to the CQI of each frequency band of base-station transmission (status transmission).In addition, based on the CQI (status transmission) that can send here by terminal, be main band by frequency band selection good for communication environments.Similarly, can be expansion frequency band by frequency band selection good for communication environments.Like this, transmission characteristic can be improved by selecting better frequency band, also owing to decreasing the number of times again sent of data, so transmission speed can be improved.
[the 6th execution mode: the high efficiency of transmission of service band information]
Be characterised in that disclosed in this 6th execution mode, for each of multiple frequency band (frequency band 1 ~ frequency band 4), (i) frequency band identification number, (ii) use/are not used as main band, (iii) uses/does not use as expansion frequency band and in each information (i ~ iv) in the maintenance of (iv) present situation at least 1 carries out encoding and being transferred to counterparting communications device.
Figure 26 is the figure of the table of the high efficiency of transmission represented for illustration of service band information.Table 1 represents an example of the with number correspondence of service band-frequency, and table 2 and table 3, for service band-use/untapped establishing method, illustrate the 1st example and the 2nd example respectively.
In the transmission of the above-mentioned service band information of the respective embodiments described above, such as, by transmitting this number to bandwidth assignment number, thus the situation comparing transmission frequency value itself can cut down control channel amount of information.Use above-mentioned table 1 ~ table 3 that object lesson is described.And indicate herein and set the frequency band that can use in communication system entirety as 800 [MHz] ~ 820 [MHz], be divided into the example that 4 frequency bands carry out using as shown in Figure 9.
First, allocated frequency band number (1,2,3,4) respectively of each frequency band shown in his-and-hers watches 1.Then set like that according to table 2 and which frequency band is used as main band, which frequency band is used as expansion frequency band (or not using).
Be such as now " use " at frequency band 1, frequency band 2 is used as " main band ", and frequency band 3 is used as " expansion frequency band ", and when frequency band 4 is not for " use ", control data " yy1100zz " such below becoming, yy and zz is " 01 " or " 10 " herein.
And although herein according to the above-mentioned control data of sequentially built of frequency band 1, frequency band 2, frequency band 3, frequency band 4, as long as this order can identify at transmitter side and receiver side, then which kind of order can.But also the quantity of frequency band can be increased and decreased arbitrarily.And then, although herein illustrate the frequency band of continuous 4, also can be the discontinuous frequency band on the way with non-service band.
As mentioned above, by carrying out encode (list), Phase Proportion, as the situation of the value of the centre frequency of transmission band itself, can cut down amount of information.
And then as shown in table 3, can also be arranged on situation that behaviour in service do not change, namely " present situation maintenance " when setting.
As mentioned above, by encoding (list) to service band information, can the data length of compression control signal.Therefore, in the latter, decrease the ratio of transmission data and control channel information, the efficiency of transmission thus transmitting data improves.
[the 7th execution mode: the continuous setting of expansion frequency band and discontinuous setting]
Feature disclosed in this 7th execution mode is shown first below.
I) the continuous print expansion frequency band of 1 expansion frequency band or more than 2 is distributed to and main band continuous print frequency band on the frequency axis,
Ii) or on said frequencies axle, also comprise all discontinuous isolated expansion frequency band with all expansion frequency bands,
Iii) for following the partial insertion junk of not service band of above-mentioned isolated expansion frequency band to be transferred to counterparting communications device.And, as the figure of this 7th execution mode of optimal representation, there is Figure 27 and above-mentioned Figure 22.
Figure 27 is that the figure of the dynamic modification representing expansion frequency band, above-mentioned Figure 22 represent the situation selecting continuous print expansion frequency band, and on the other hand, Figure 27 represents the situation of the selection (the 4th section with reference to this figure) carrying out discontinuous expansion frequency band.And the view of Figure 27 is identical with the view of above-mentioned Figure 22.Illustrate below.
First expansion frequency band continuous print situation is described, the situation of above-mentioned Figure 22 has represented continuous selected expansion frequency band.Wherein as an example, indicating will be the situation expanding frequency band with the paired continuous print frequency band selection of main band.In the mode of this Figure 22, because expansion frequency band and main band are continuous, so compare discontinuous situation (Figure 27), signal transacting becomes and facilitates.And, about sending action and receiving action, with illustrate in each execution mode above-mentioned identical.
On the other hand, the expansion discontinuous situation of frequency band (the 4th section) is illustrated in figure 27 as mentioned above.Like this, can according to terminal can the compatibility of service band, communication environments and the terminal with other, select discontinuously to expand frequency band to main band or adjacent expansion frequency band.
And, do not set the subcarrier (SC with reference to the dotted line of Figure 22) crossing over continuous print frequency band in explanation so far, but according to the behaviour in service of other-end, the subcarrier that also can arrange leap 2 frequency bands correspondingly increases transmission information amount.
In addition, in receiver side terminal, the signal becoming above-mentioned discontinuous frequency band does not receive, or is processed forcibly as junk by this signal.Thus, even if expansion frequency band is discontinuous, also can receive without hindrance.
As mentioned above, by setting discontinuous expansion frequency band, can the behaviour in service of service band, communication environments and other-end selecting neatly to expand frequency band of terminal can be considered.And frequency usage efficiency can be made thus more to improve.
[the 8th execution mode: make the subcarrier number in each frequency band constant]
Be characterised in that disclosed in this 8th execution mode, make the respective bandwidth of multiple frequency band (frequency band 1 ~ frequency band 4) be the steady state value of regulation, and the quantity of a series of subcarrier in respective frequency band is also the steady state value of regulation.
Figure 28 is the figure of the 1st example representing frequency band expansion mode.
Figure 29 is the figure of the 2nd example representing frequency band expansion mode.
Figure 30 is the figure of the 3rd example representing frequency band expansion mode.
And the view of the view of these Figure 28 ~ Figure 30 and above-mentioned Figure 22 and Figure 24 and Figure 27 etc. is about the same, in Figure 22, Figure 24, Figure 27 etc., use actual waveform to represent, on the other hand, in Figure 28 ~ Figure 30, replace the waveform of that reality and only represent as the block of subcarrier.This is for ease of this 8th execution mode is described.That is, be easy to illustrate " band unit " this concept with visually understanding.And term used in Figure 28 ~ Figure 30 all illustrated except " processing delay ".This so-called processing delay, such as, with reference to Fig. 4, means from after service band information If is imported into service band configuration part 25, generates the time delay needed for process till the setting parameter that band setting index signal Sb finishes in each circuit part again.
Usually in the communication mode of a series of subcarrier using multicarrier transmission mode (QFDM and MC-CDMA etc.) such, when carrying out the change of bandwidth, it is very common for carrying out changing with subcarrier unit.Now, use/do not use must be set with subcarrier unit.In addition, no matter in transmission processing or receive in process, all need to carry out recognizing use/untapped signal transacting with subcarrier unit, the setting of frequency band likely can be made to become numerous and diverse and complicated.And then when carrying out user and being multiplexing, produce the use/untapped needs controlling each subcarrier between users, its result, causes the reduction of frequency usage efficiency.
So in this 8th execution mode, communication system entirety can be divided into multiple frequency band (frequency band 1 ~ frequency band 4) by service band, on the basis of " quantity of subcarrier is constant " simultaneously in this each frequency band split, use the transmission between one or more frequency bands for communication device.Thus, the improvement of frequency usage efficiency can be realized.
Specifically, such as set a frequency band as 5 [MHz], the subcarrier number in this frequency band is 25.Set multiple this frequency band, make above-mentioned service band variable with band unit.In above-mentioned Figure 28 ~ Figure 30, illustrate the object lesson of the frequency band expansion under band unit.The transverse axis of each figure represents bandwidth, and the block being applied with hachure represents a frequency band, is located in this frequency band and has inserted multiple subcarrier.Think to be frequency band 1, frequency band 2, frequency band 3, frequency band 4 from the left side in the same manner as Fig. 9.
Represent the situation of frequency band 1 as main band in Figure 28, represent the situation of frequency band 2 as main band in Figure 29.And represent in fig. 30 in time through and change the example of setting of expansion frequency band, and, represent that comprising its expansion frequency band is discontinuous situation (with reference to the 6th period).Further, the concrete action of transmitting-receiving is as described in above-mentioned execution mode.
As mentioned above, can easily make service band variable, and high-frequency service efficiency can be put forward.Compare the situation making service band variable with subcarrier unit, above-mentioned transmitting-receiving action becomes more easy, and the structure of transceiver also becomes simple.
[the 9th execution mode: make the subcarrier number in each frequency band together with subcarrier bandwidth for constant]
Disclosed in this 9th execution mode, feature is as follows.
I) make each bandwidth of multiple frequency band (frequency band 1 ~ frequency band 4) be the steady state value specified, and make the bandwidth of each subcarrier in respective frequency band also be the steady state value of regulation.
Ii) and then, the quantity of each subcarrier is also the steady state value of regulation.Thereby, it is possible to be easy to band unit setting main band and expansion frequency band.
In above-mentioned 8th execution mode, the number of the subcarrier of every frequency band is constant, but the bandwidth of each subcarrier is also constant in this 9th execution mode.
Its result, the mutual difference of frequency band is only in respective center frequency value.Thus, base band signal process and frequency band, independently by homogenization, compare the 8th execution mode, and the structure of transceiver is more easy.
[the 10th execution mode: the setting based on the frequency band of the difference of required transmission speed and actual transmission speed]
Disclosed in this 10th execution mode, feature is as follows.
I) in order to judge that frequency band expanded by needs/do not need, calculate the required transmission speed S1 of anticipation required for information exchange and the difference (S1-S2) of the actual actual transmission speed S2 reached, judge respectively to need and do not need to expand frequency band according to the positive and negative of this difference
Ii) herein, above-mentioned actual transmission speed is obtained by the quantity of transmission data message that calculates from the quantity of used frequency band and the transmission interval of this transmission data message.
Figure 31 is the figure of the structure example of the communicator (transmitter side) representing the 10th execution mode.
Figure 32 is the flow chart of the action case of the device representing Figure 31.
First almost identical with the structure of above-mentioned Fig. 5 (Fig. 3 too) with reference to Figure 31, Ben Tu, just different on the frequency band selection/configuration part 85 (distortion of 15) imported shown in this figure left end and this aspect of actual transmission speed calculating part 86.
Then with reference to Figure 32, this action is,
Step S91: confirm required transmission speed,
Step S92: confirm to send data volume,
Step S93: calculate actual transmission speed.
Step S94: judge whether to be necessary to expand service band based on each velocity amplitude of step S91 and step S93, setting tool has this necessity.
Step S95: select expansion frequency band, and determine to change timing,
Step S96: transmit this expansion frequency band and its change timing in down control channel.
Step S97: receive above-mentioned expansion frequency band and change timing,
Step S98: the setting changing each circuit part according to this change timing,
Step S99: start in the expansion frequency band after change to receive.
Specifically describe again, in above-mentioned 1st execution mode, only based on required transmission speed, determine the use/do not use and expand the quantity of frequency band expanding frequency band, and in this 8th execution mode, also consider that the difference of actual actual transmission speed and required transmission speed is to carry out the expansion of frequency band or to reduce.
Re-use Figure 31 and Figure 32 and concrete example is described.And omit the part identical with the 1st execution mode.
If the required transmission speed Rd of certain transmission data Du is 10 [Mbps], main band and expansion frequency band is used to transmit.Now, the quantity of the transmission data calculated according to the quantity from service band and send interval, can calculate actual actual transmission speed Ra with the actual transmission speed calculating part 86 of Figure 31.In above-mentioned selection/configuration part 85, compare this actual transmission speed Ra and required transmission speed Rd, increase (expansion) service band when actual transmission speed Ra is lower.In addition, such as, when being judged as that actual transmission speed Ra significantly exceedes required transmission speed Rd, even if decrease service band when also can maintain required transmission speed Rd, cut down (reducing) service band.
As mentioned above, both can meet required transmission speed, realize again the raising of frequency usage efficiency.And, in addition to the method described above, can also return whether be transferred to terminal (ACK/NACK) from the data of base-station transmission to base station, calculate actual transmission speed based on this, make service band variable.In addition, to calculate transmission speed based on the data volume of base-station transmission, and base station can also be returned in terminal, based on this value, make service band variable.
[the 11st execution mode: the expansion of service band]
Figure 33 is the figure for illustration of this 11st execution mode, and the part that should be noted that especially is " frequency band in restriction " and " the whole frequency band after lifting restrictions ".Originally the feature disclosed in the 11st execution mode is shown herein as follows.
I) come at communicator (10 by the multicarrier transmission mode under a series of subcarrier, 20) carry out each other in the communication system of exchange of information, in the multiple dividing frequencybands (frequency band a ~ frequency band d) formed whole frequency band (" the whole frequency band after lifting restrictions " with reference to Figure 33) segmentation of this communication system will should be distributed to from now on, under current permission uses the situation (with reference to " frequency band in restriction ") of the dividing frequencyband (" frequency band a ") of its part, 1 is further divided into or multiple frequency band (the frequency band 1 ~ frequency band 4 as in the 1st ~ 10th execution mode) uses by allowing the dividing frequencyband " frequency band a " of this use, and for each at current other dividing frequencyband (frequency band b confined, frequency band c, frequency band d), be divided into 1 or multiple frequency band (the frequency band 1 ~ frequency band 4 as the 1st ~ 10th execution mode) similarly.Then, when relieving this restriction from now on, each of current untapped multiple dividing frequencyband (frequency band b ~ frequency band d) of forming for the whole frequency band of segmentation, application is immediately with by the above-mentioned current dividing frequencyband being allowed to use, (frequency band a) is divided into 1 or multiple frequency band to use identical utilization
Ii) here, the multiple dividing frequencybands (frequency band a ~ frequency band d) above-mentioned whole frequency band segmentation formed have constant bandwidth mutually, and the quantity of subcarrier in this each dividing frequencyband and bandwidth have steady state value mutually.
Specifically describe again, according to the compatibility with other communication systems, this communication system (or base station) operable frequency band is limited, afterwards, transferred to the reason of elsewhere etc. by the frequency of utilization of other communication systems above-mentioned, likely occur the situation removing this restriction.
When imagining this situation, the service band (" the frequency band a in restriction ") in above-mentioned restriction is divided into one or more frequency band to use in the same manner as above-mentioned execution mode.And now, by confined frequency band (frequency band b, frequency band c, frequency band d), be also divided into one or more frequency band respectively.And preferably splitting with same band can service band (each frequency band (frequency band b ~ frequency band d) of frequency band a) and in restriction.Figure 33 carries out splitting with same band like this.And in fig. 33, service band is restricted to frequency band a and uses as a frequency band, the frequency band in restriction is divided into 3 frequency bands (frequency band b ~ frequency band d), but makes due to restriction that these frequency bands b ~ d is current cannot be used.Further, the subcarrier number preferably in these frequency bands and subcarrier bandwidth are constant.
And owing to setting frequency band as one (frequency band a), so cannot expand service band in restriction.According to this 11st execution mode, after relieving above-mentioned restriction, service band is 4 (frequency band a ~ d), can transfer to immediately in the utilization of above-mentioned execution mode.
By setting frequency band as mentioned above, although thus current service band be limited, when relieving restriction afterwards, use can shift immediately by system of the present invention.It can realize the utilization flexibly of communication system.
As above describe in detail, according to the present invention, can be easy to make service band adaptive-bandwidth, also significantly can improve the service efficiency of frequency thus.
According to an aspect of the present invention, a kind of communicator is provided, this communicator is accommodated in and uses the multicarrier transmission mode based on a series of subcarrier to carry out each other in the communication system of information exchange at communicator, it is characterized in that, specific frequency band is set in the multiple frequency bands formed from splitting the whole frequency band be assigned to this communication system, use this specific frequency band to transmit service band information, which of this frequency band remaining be described service band information should use for determining each other at above-mentioned communicator.
According to another aspect of the present invention, be the main band in above-mentioned whole frequency band by above-mentioned specific band setting, this main band goes back transmitting data information except above-mentioned service band information.
According to another aspect of the present invention, using at least 1 frequency band set in the frequency band that removes in above-mentioned multiple frequency band outside above-mentioned main band as expansion frequency band, the further data message of this expansion frequency band prevailing transmission.
According to another aspect of the present invention, above-mentioned main band sets regularly when the radiolink that above-mentioned communicator is mutual is established.
According to another aspect of the present invention, when having multiple above-mentioned communicator, separately above-mentioned main band is set respectively to each in above-mentioned multiple frequency band, and each corresponding in the plurality of communicator distributes each this main band.
According to another aspect of the present invention, the above-mentioned communicator of more than 2, by time-multiplexed and/or extended code is multiplexing, uses same above-mentioned main band simultaneously.
According to another aspect of the present invention, needed for above-mentioned data message, transmission speed increases and decreases the quantity of above-mentioned expansion frequency band.
According to another aspect of the present invention, the frequency band above-mentioned main band in above-mentioned multiple frequency band should being occupied passes through in time and can change.
According to another aspect of the present invention, judge the quality of the communication environments between above-mentioned communicator, the frequency band selecting communication environments best in above-mentioned multiple frequency band or the frequency band being equivalent to best communication environments are to be set as above-mentioned main band.
According to another aspect of the present invention, when the above-mentioned main band of new settings, notify the change of this frequency band to counterparting communications device in advance.
According to another aspect of the present invention, between above-mentioned communicator, use the testing result of the transmission quality obtained in response to the pilot channel sent or pilot signal, judge the quality of above-mentioned communication environments.
According to another aspect of the present invention, the judgement of the quality of above-mentioned communication environments is carried out successively or simultaneously to all above-mentioned multiple frequency bands.
According to another aspect of the present invention, the judged result of the quality of above-mentioned communication environments is transferred to counterparting communications device by the control channel under specific above-mentioned frequency band.
According to another aspect of the present invention, the frequency band being set as above-mentioned expansion frequency band in above-mentioned multiple frequency band is made to pass through in time and can change.
According to another aspect of the present invention, judge the quality of the communication environments between above-mentioned communicator, select the frequency band being equivalent to best communication environments in above-mentioned multiple frequency band to be set as above-mentioned expansion frequency band.
According to another aspect of the present invention, when radiolink is established, limit the operable frequency band of this communicator, the above-mentioned main band of dynamic assignment and expansion frequency band in the frequency band that this limits.
According to another aspect of the present invention, should be set as that the set information of the frequency band of above-mentioned expansion frequency band is given advance notice to counterparting communications device to perform expansion.
According to another aspect of the present invention, receive the band setting information relevant to the frequency band that can carry out above-mentioned expansion or the frequency band that can change from counterparting communications device, carry out the change of above-mentioned expansion frequency band or main band.
According to another aspect of the present invention, also the change timing information relevant to the timing of above-mentioned change is received.
According to another aspect of the present invention, the judged result of the quality of above-mentioned communication environments is transferred to counterparting communications device by the control channel under specific above-mentioned frequency band.
According to another aspect of the present invention, between above-mentioned communicator, use the testing result of the transmission quality returned in response to the pilot channel sent or pilot signal, judge the quality of above-mentioned communication environments.
According to another aspect of the present invention, according to this communicator can frequency of utilization, among transmission speed needed for the quality of communication environments, the behaviour in service of each this frequency band and above-mentioned data message under each above-mentioned frequency band at least 1, judge the above-mentioned setting of expansion frequency band or the necessity of change.
According to another aspect of the present invention, when the above-mentioned expansion frequency band of new settings, notify the change of this frequency band to counterparting communications device in advance.
According to another aspect of the present invention, these both sides of frequency band that the above-mentioned expansion frequency band in the frequency band that the above-mentioned main band in above-mentioned multiple frequency band should be occupied and the plurality of frequency band should occupy do not overlap each other, and in time through and can change.
According to another aspect of the present invention, change 1 above-mentioned main band and at least 1 above-mentioned expansion frequency band simultaneously.
According to another aspect of the present invention, the quality of each of above-mentioned multiple frequency band being carried out respectively to the above-mentioned communication environments between above-mentioned communicator judges, this judged result is transferred to counterparting communications device respectively according to each this frequency band.
According to another aspect of the present invention, the quality of each of above-mentioned multiple frequency band being carried out respectively to the above-mentioned communication environments between above-mentioned communicator judges, respective judged result multiplexing the collecting about this all frequency bands is transferred to counterparting communications device.
According to another aspect of the present invention, to use in the good above-mentioned frequency band of above-mentioned main band, above-mentioned expansion frequency band and communication environments some transmits above-mentioned judged result to above-mentioned counterparting communications device.
According to another aspect of the present invention, about each in above-mentioned multiple frequency band, to frequency band identification number, use/do not use as above-mentioned main band, use/do not use as at least 1 in each information in above-mentioned expansion frequency band and present situation maintenance encodes, and be transferred to counterparting communications device.
According to another aspect of the present invention, this expansion frequency band of continuous print of 1 above-mentioned expansion frequency band or more than 2 is distributed to and the above-mentioned frequency band of above-mentioned main band continuous print on the frequency axis.
According to another aspect of the present invention, said frequencies axle also comprises any one all discontinuous isolated expansion frequency band with above-mentioned expansion frequency band.
According to another aspect of the present invention, for following the partial insertion junk of not service band of above-mentioned isolated expansion frequency band to be transferred to counterparting communications device.
According to another aspect of the present invention, make each bandwidth of above-mentioned multiple frequency band be the steady state value specified, and make the quantity of the above-mentioned a series of subcarrier in respective frequency band also be the steady state value of regulation.
According to another aspect of the present invention, make each bandwidth of above-mentioned multiple frequency band be the steady state value specified, and make the bandwidth of each the above-mentioned subcarrier in respective frequency band also be the steady state value of regulation.
According to another aspect of the present invention, and the quantity of each above-mentioned subcarrier also for regulation steady state value.
According to another aspect of the present invention, in order to judge needs/do not need above-mentioned expansion frequency band, calculate the required transmission speed S1 of anticipation required for above-mentioned information exchange and the difference (S1-S2) of the actual actual transmission speed S2 reached, judge respectively need and do not need this expansion frequency band according to the positive and negative of this difference.
According to another aspect of the present invention, above-mentioned actual transmission speed is obtained by the quantity of transmission data message that calculates from the quantity of used above-mentioned frequency band and the transmission interval of this transmission data message.
According to another aspect of the present invention, a kind of communication system is also provided, this communication system uses the exchange carrying out information based on the multicarrier transmission mode of a series of subcarrier at communicator each other, it is characterized in that, in the multiple dividing frequencybands formed the whole frequency band segmentation of this communication system will should be distributed to from now on, current when allowing to use the dividing frequencyband of its part, 1 is further divided into or multiple frequency band uses by allowing the dividing frequencyband of this use, and for current other each of above-mentioned dividing frequencyband confined, be divided into 1 or multiple frequency band similarly, when relieving this restriction from now on, each of current untapped above-mentioned multiple dividing frequencyband of forming for the above-mentioned whole frequency band of segmentation, be suitable for immediately and carry out using identical utilization with the above-mentioned current dividing frequencyband being allowed to use being divided into 1 or multiple frequency band.
According to another aspect of the present invention, the multiple dividing frequencybands above-mentioned whole frequency band segmentation formed have constant bandwidth mutually, and the quantity of above-mentioned subcarrier in this each dividing frequencyband and bandwidth have steady state value mutually.

Claims (2)

1. a transmitter side communicator, this transmitter side communicator is accommodated in communication system, described communication system is used for by using the multicarrier transmission mode of multiple subcarrier to carry out information exchange between the described transmitter side communicator be all incorporated in described communication system and receiver side communicator, it is characterized in that, described transmitter side communicator comprises:
Send data generating section, this transmission data generating section is for generating the transmission data comprising service band information, and described service band information instruction will use which the remaining frequency band beyond specific frequency band between described transmitter side communicator and described receiver side communicator; And
Wherein, described transmitter side communicator is configured to by using specific frequency band to send described service band information, and described specific frequency band sets from the multiple frequency bands being assigned to described communication system,
Wherein, described specific frequency band is made to pass through in time and can change, for switching to another frequency band in described multiple frequency band.
2. be accommodated in the communication system in communication network, this communication system carries out information exchange by using the multicarrier transmission mode of multiple subcarrier between transmitter side communicator and receiver side communicator, and described transmitter side communicator comprises:
Send data generating section, this transmission data generating section is for generating the transmission data comprising service band information, and described service band information instruction will use which the remaining frequency band beyond specific frequency band between described transmitter side communicator and described receiver side communicator; And
Wherein, described transmitter side communicator is configured to by using specific frequency band to send described service band information, and described specific frequency band sets from the multiple frequency bands being assigned to described communication system;
Wherein, described specific frequency band is made to pass through in time and can change, for switching to another frequency band in described multiple frequency band.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002111631A (en) * 2000-10-04 2002-04-12 Yrp Mobile Telecommunications Key Tech Res Lab Co Ltd System and apparatus for radio communication
US6567387B1 (en) * 2000-11-07 2003-05-20 Intel Corporation System and method for data transmission from multiple wireless base transceiver stations to a subscriber unit
CN1442963A (en) * 2002-03-06 2003-09-17 株式会社Ntt都科摩 Communication control method and communication control system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3780551B2 (en) * 1996-01-29 2006-05-31 ソニー株式会社 Signal transmission method and apparatus by multiple access
JPH10224659A (en) * 1997-02-07 1998-08-21 Jisedai Digital Television Hoso Syst Kenkyusho:Kk Orthogonal frequency division multiplex transmission system and transmission/reception device used for the same
US6128490A (en) * 1997-05-08 2000-10-03 Nortel Networks Limited Wireless communication system that supports selection of operation from multiple frequency bands and multiple protocols and method of operation therefor
EP0938193A1 (en) * 1998-02-18 1999-08-25 Sony International (Europe) GmbH Header structure for TDD systems
JP3826653B2 (en) * 2000-02-25 2006-09-27 Ｋｄｄｉ株式会社 Subcarrier allocation method for wireless communication system
EP1816666B1 (en) * 2004-10-29 2016-02-03 Fujitsu Ltd. Communication device by multicarrier transmission method and communication system
JP2010224659A (en) * 2009-03-19 2010-10-07 Canon Inc Information processing device, information processing method, program and storage medium

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002111631A (en) * 2000-10-04 2002-04-12 Yrp Mobile Telecommunications Key Tech Res Lab Co Ltd System and apparatus for radio communication
US6567387B1 (en) * 2000-11-07 2003-05-20 Intel Corporation System and method for data transmission from multiple wireless base transceiver stations to a subscriber unit
CN1442963A (en) * 2002-03-06 2003-09-17 株式会社Ntt都科摩 Communication control method and communication control system

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