CN103227765A - Data transmission method based on orthogonal frequency division multiplexing (OFDM) and transmitting station - Google Patents

Abstract

The invention discloses a data transmission method based on orthogonal frequency division multiplexing (OFDM). The method is used for transmitting uplink data in a short or medium distance in a wireless communication system and dividing an available band of the system into N basic sub-bands in advance. The method comprises the following steps: a transmitting station occupies M basic sub-bands and modulates data to the M basic sub-bands to transmit the data; and a receiving station receives one or more data from the transmitting station within the range of the N basic sub-bands, wherein M is less than or equal to N, and both M and N are positive integers. By the combination of the OFDM technology and the sub-bands, different bandwidth configurations in the transmitting station and the receiving station of the wireless communication system are allowed; the transmitting station can adopt low configuration to reduce the hardware cost, while the receiving station can adopt high configuration to improve the efficiency such as spectral efficiency and throughput rate; and simultaneous communication between a plurality of user stations and an access point can be realized.

Description

A kind of data transmission method and emission website based on OFDM

It is on March 25th, 2011 that the application requires the applying date, application number is 201110074380.X, denomination of invention is a kind of based on the data transmission method of OFDM and the priority in first to file of system, and the applying date is on May 19th, 2011, application number is 201110130194.3, denomination of invention is a kind of priority in first to file of communication system, and the applying date is on August 11st, 2011, application number is 201110230269.5, denomination of invention is a kind of based on the data transmission method of OFDM and the priority in first to file of system, and the applying date is on February 8th, 2012, application number is 201210027883.6, denomination of invention is a kind of based on the data transmission method of OFDM and the priority in first to file of system, and above-mentioned full content in first to file all embodies in this application.

Technical field

The present invention relates to wireless communication technology field, specifically, relate to a kind of data transmission method and system based on OFDM.

Background technology

In WLAN (wireless local area network) WLAN technology based on 802.11 series standards, insert (CSMA by carrier sense multiple, Carrier Sense Multiple Access) realizes multi-user's transmission, be that a plurality of websites (STA) can not insert access point (CAP) simultaneously, can only timesharing insert, even CAP is free ideler frequency spectrum resource STA to utilize.Such as, in the system of 802.11n, CAP can occupy the 40MHz bandwidth resources, and can be divided into 2 20MHz subbands, STA can only utilize whole 40MHz bandwidth or one of them 20MHz subband to communicate by letter with CAP, communicates by letter with CAP simultaneously but the STA of two support 20MHz bandwidth can not take one of them 20MHz subband respectively, can only communicate by letter with CAP with the main channel in the 40MHz bandwidth on the different time periods, and 20MHz is from channel idle, and this has just caused the waste of frequency spectrum resource.

OFDM (OFDMA, Orthogonal Frequency Division Multiple Access) be a kind of access mode that adopts in the mobile communication system, a plurality of portable terminals (MS) take sub carrier group different in the available bandwidth and base station (BS) communicates simultaneously, can improve the availability of frequency spectrum.

Among the existing WLAN, when communicating by letter with CAP, STA must the both adopt identical band width configuration, such as in the system of 802.11n, when communicating by letter with CAP, adopts STA the bandwidth of 40MHz or the bandwidth of employing 20MHz, if CAP supports the 40MHz bandwidth in the wlan network, the STA that two 20MHz are arranged, that CAP can only adopt the band width configuration of 20MHz to communicate by letter with the STA that competes the main channel resource, therefore cause the waste of 20MHz frequency spectrum resource.In the wireless local area network technology in future, CAP can with bandwidth may reach 80MHz even more, if continue to continue to use above-mentioned band width configuration scheme, then will cause the more waste of multiple spectra resource.

In the OFDMA mechanism, though a plurality of terminals can take different subcarrier while and base station communication, but receiving terminal and transmitting terminal need be supported same band width configuration, be transmitting terminal inverse fast fourier transform (IFFT, the FFT of module and receiving terminal fast Fourier transform Inverse Fast Fourier Transform) (FFT, Fast Fourier Transform) module counts must be identical.The uplink orthogonal frequency division multiple access inserts the access mode of OFDMA to having relatively high expectations synchronously in addition.In time-domain, the signal demand of a plurality of portable terminals (MS) emission arrives base station (BS) simultaneously and just can not cause intersymbol interference and inter-user interference; In frequency domain, because a plurality of MS carrier of transmitter crystal oscillator frequency precision differences, also different with the deviation of BS carrier wave crystal oscillator frequency, therefore the frequency shift (FS) of signal of each MS that arrives BS is also different, and OFDM modulation itself is to the frequency deviation sensitivity, correctly demodulation of frequency deviation must be proofreaied and correct, otherwise multi-user interference can be caused from each MS signal.Therefore, in the OFDMA system, time synchronized and Frequency Synchronization are key issues, need complicated synchronized algorithm.In wireless local area network (WLAN) system, if adopt the access mode of OFDMA will increase equipment cost in order to improve spectrum efficiency.

Summary of the invention

The invention provides a kind of data transmission method and emission website, can realize that a plurality of emission websites communicate with receiving station simultaneously, and complexity is low, can improve the availability of frequency spectrum, system throughput based on orthogonal frequency division multiplex OFDM.

In order to solve the problems of the technologies described above, the present invention proposes a kind of data transmission method based on OFDM, comprising:

The emission website takies M basic sub-band, modulates data on described M the basic sub-band to send;

Receiving station receives the data of sending from one or more emission website in N basic sub-band scope;

M≤N, M, N are positive integer.

In order to solve the problems of the technologies described above, the present invention also proposes a kind of emission website, comprising:

Configuration module is used for the information that the stored transmit website allows the M that takies basic sub-band: M≤N, N are the number of the basic sub-band that takies of receiving station, and M, N are positive integer;

Send processing module, be used to modulate data on described M and send on the sub-band substantially.

In order to solve the problems of the technologies described above, the present invention also proposes a kind of resource indicating method, comprising:

Dispatch one or more subchannels;

Generate a control signaling, comprising the bitmap that is used to indicate the one or more subchannels that are scheduled;

Send described control signaling.

In order to solve the problems of the technologies described above, the present invention also proposes a kind of resource indicating device, comprising:

Scheduler module is used to dispatch one or more subchannels;

Package module is used to generate a control signaling, comprising the bitmap that is used to indicate the one or more subchannels that are scheduled;

Sending module is used to send described control signaling.

In order to solve the problems of the technologies described above, the present invention also proposes a kind of resource indicating method, comprising:

Receive a control signaling, parsing wherein is used to indicate the bitmap of the subchannel that is scheduled, and learns the one or more subchannels that are scheduled;

Transmission information on the described one or more subchannels that are scheduled.

In order to solve the problems of the technologies described above, the present invention also proposes a kind of resource indicating device, comprising:

Receiver module is used to receive a control signaling,

Parsing module is used for resolving described control signaling and is used to indicate the bitmap of the subchannel that is scheduled, and learns the one or more subchannels that are scheduled;

Sending module, transmission information on the described one or more subchannels that are scheduled.

In order to solve the problems of the technologies described above, the present invention also proposes a kind of resource indicating method, comprising:

Be provided for indicating the bit group of subchannel scheduling, the respectively corresponding subchannel of each bit wherein;

According to the result of subchannel scheduling, the pairing one or more bit of the one or more subchannels that are scheduled are set to first value;

By sending described bit group in the control signaling.

In order to solve the problems of the technologies described above, the present invention also proposes a kind of resource indicating device, comprising:

Scheduler module is used to be provided for indicating the bit of subchannel scheduling to organize the respectively corresponding subchannel of each bit wherein;

Package module is used for the result according to the subchannel scheduling, and the pairing one or more bit of the one or more subchannels that are scheduled are set to first value;

Sending module is used for sending described bit group by a control signaling.

In order to solve the problems of the technologies described above, the present invention also proposes a kind of resource indicating method, comprising:

Receive a control signaling;

Acquisition is used to indicate the bit group of subchannel scheduling, the respectively corresponding subchannel of each bit wherein;

Learn that according to the one or more bit that are set to first value in the described bit group pairing one or more subchannel is scheduled;

Transmission information on the described one or more subchannels that are scheduled.

In order to solve the problems of the technologies described above, the present invention also proposes a kind of resource indicating device, comprising:

Receiver module is used to receive a control signaling;

Parsing module is used to obtain to be used to indicate the bit of subchannel scheduling to organize the respectively corresponding subchannel of each bit wherein; Learn that according to the one or more bit that are set to first value in the described bit group pairing one or more subchannel is scheduled;

Sending module, transmission information on the described one or more subchannels that are scheduled.

In sum, technical scheme provided by the invention, use based on OFDM technology and sub-band combination, allow the emission site STA in the wireless communication system different band width configuration to be arranged with receiving station CAP, the emission site STA can adopt lower configuration to reduce hardware implementation cost, receiving station CAP then can adopt higher configuration to raise the efficiency: the availability of frequency spectrum, throughput etc., and can realize that a plurality of STA communicate with CAP simultaneously.In addition, having increased the protection frequency band at the edge of sub-band is virtual carrier, can avoid disturbing between sub-band, and each sub-frequency bands can do molding filtration without help, and receiving terminal only need be done the matched filtering on the whole frequency band, need not a plurality of band receiver of base and does matched filtering at different sub-bands; Expand Cyclic Prefix (CP), reduced the requirement of time synchronized.Receiving terminal baseband sample sampling rate is N a times of basic subband samples sampling rate, guarantee an IFFT/FFT module that needs N1 to order on the basic sub-band, the IFFT/FFT module that receiving terminal is ordered with N2=N*N1, and do not need a plurality of parallel N1 point IFFT/FFT modules to come the information of each sub-frequency bands of demodulation.So both can improve the availability of frequency spectrum, system throughput, and can realize that a plurality of STA communicate with CAP simultaneously, and needn't increase the cost of system and user site equipment.

Description of drawings

Fig. 1 is a kind of data transmission method flow chart based on OFDM of the embodiment of the invention;

Fig. 2 is a wireless communication system architecture schematic diagram in the prior art;

Fig. 3 is multi-band OFDM transmitting terminal and a receiving terminal baseband portion module frame chart in the embodiment of the invention;

Fig. 4 (a) and (b), (c) and (d) be respectively several sub-band division schematic diagrames in the embodiment of the invention;

Fig. 5 (a) and 5 (b) are two kinds of sub-band division schematic diagrames in addition among Fig. 4 (b);

Fig. 6 is a kind of emission website of embodiment of the invention block diagram;

Fig. 7 is the dispensing device block diagram of a kind of resource indication of the embodiment of the invention;

Fig. 8 is the receiving system block diagram of a kind of resource indication of the embodiment of the invention;

Fig. 9 is the dispensing device block diagram of the another kind of resource indication of the embodiment of the invention;

Figure 10 is the receiving system block diagram of the another kind of resource indication of the embodiment of the invention.

Embodiment

In view of deficiency of the prior art, the present invention proposes a kind of multi-user data transmission plan that is used for the short-distance and medium-distance radio communication, employing is similar to multi-user's access way of OFDM OFDMA, based on OFDM and corresponding synchronous mechanism, the available band of system is divided into N basic sub-band (being also referred to as subchannel), the bandwidth of transmitting terminal (being STA) transceiver can be the frequency band of basic sub-band or sub-band combination, and receiving station (being CAP) transceiver bandwidth can be N basic sub-band as the case may be.Suppose, basic sub-band is 20MHz, receiving station transceiver bandwidth can be 20MHz, 40MHz, 80MHz, promptly also can receive and dispatch the signal of the CAP of 80MHz bandwidth for the STA receiver of only supporting the 20MHz bandwidth, like this, the present invention is based on the OFDM modulation technique and can realize that a plurality of STA utilize different sub-band resources to communicate by letter with CAP, and reduced required Time and Frequency Synchronization requirement and the synchronization accuracy of OFDMA system.

A kind of data transmission method based on OFDM provided by the invention is used for short-distance and medium-distance wireless communication system transmitting uplink data, and the available band of system is divided into N basic sub-band, and as shown in Figure 1, this method comprises:

Step S101: the emission website takies M basic sub-band, modulates data on described M the basic sub-band to send;

Step S102: receiving station receives the data of sending from one or more emission website in N basic sub-band scope.

Wherein, M≤N, M, N are positive integer.

Afterwards, described receiving station separates by the data that receive being carried out frequency-region signal, is respectively launched the data that website sends.

Described emission website is supported the bandwidth of M basic sub-band at least; Described receiving station is supported the bandwidth of N basic sub-band at least.For example, support the STA of 80MHz bandwidth can take 20MHz, 40MHz or 80MHz transmission data.In like manner, support the CAP of 80MHz bandwidth also can in 20MHz, 40MHz or 80MHz scope, receive data.

Above-mentioned M, the N parameter configuration is realized that by media access control layer (MAC) layer the value of M can be configured according to bandwidth ability and the assignable resource that STA supports by CAP.The value of N is then by the needs configuration of CAP according to bandwidth resources.When specific implementation, can be that STA sends resource request to described CAP, carry the bandwidth ability that described STA supports in the described resource request, CAP is that described STA disposes basic sub-band according to bandwidth ability and the current allowable resource that described STA supports, and carries to described STA and dispose basic sub-band information to described STA by sending response message.STA can be encapsulated as resource request the independent resource claim frame, initiates resource request by the mode of competition to CAP; Also can when the uplink transmission data frame, resource request be sent to CAP with Frame.In addition, CAP also can adopt the mode of poll to distribute uplink transmission resource to STA.

Preferably, described emission website can send described resource request on a basic sub-band, to improve utilization ratio of transmission resources.

The embodiment of the invention provides a kind of resource indicating method at this, is the STA scheduling transmission resources by CAP, specifically comprises:

Step 1: dispatch one or more subchannels;

Step 2: generate a control signaling, comprising the bitmap that is used to indicate the one or more subchannels that are scheduled;

Step 3: send described control signaling.

Wherein, described subchannel can be a subcarrier in the carrier aggregation system, also can be the subchannel (being also referred to as basic sub-band) in the spectrum aggregating system.

Above-mentioned resource indicating method both had been applicable to the ascending resource indication, also was applicable to the downlink resource indication.

Correspondingly, the embodiment of the invention also provides a kind of resource indicating method, by the indication of STA recognition resource, at the scheduled resources transmitting data, specifically comprises:

Step 1: receive a control signaling, parsing wherein is used to indicate the bitmap of the subchannel that is scheduled, and learns the one or more subchannels that are scheduled;

Step 2: transmission information on the described one or more subchannels that are scheduled.

Above-mentioned resource indicating method both had been applicable to the ascending resource indication, also was applicable to the downlink resource indication.In conjunction with STA uplink of the present invention: CAP is one or more STA scheduling transmission resources, to any STA:CAP basis is M basic sub-band of described STA scheduling, generate a control signaling, comprising the bitmap bitmap that is used in reference to M the basic sub-band that is shown described STA scheduling; Send described control signaling.After corresponding STA received described control signaling, parsing wherein was used to indicate the bitmap of the basic sub-band that is scheduled, and learnt M basic sub-band into its scheduling; Data transmission on M that is its scheduling basic sub-band.

The embodiment of the invention also provides another kind of resource indicating method at this, comprising:

Step 1: be provided for indicating the bit group of subchannel scheduling, the respectively corresponding subchannel of each bit wherein;

Step 2: according to the result of subchannel scheduling, the pairing one or more bit of the one or more subchannels that are scheduled are set to first value;

Step 3: by sending described bit group in the control signaling.

Wherein, described subchannel can be 1 subcarrier in the carrier aggregation system, also can be a subchannel in the spectrum aggregating system.

Correspondingly, the embodiment of the invention also provides a kind of resource indicating method, by the indication of STA recognition resource, at the scheduled resources transmitting data, specifically comprises:

Step 1: receive a control signaling;

Step 2: obtain to be used to indicate the bit group of subchannel scheduling, the respectively corresponding subchannel of each bit wherein;

Step 3: learn that according to the one or more bit that are set to first value in the described bit group pairing one or more subchannel is scheduled;

Step 4: transmission information on the described one or more subchannels that are scheduled.

Above-mentioned resource indicating method both had been applicable to the ascending resource indication, also was applicable to the downlink resource indication.Set in advance the bit group that is used to indicate basic dispatching sub-frequency band in conjunction with STA uplink of the present invention: CAP, the respectively corresponding basic sub-band of each bit wherein; CAP is one or more STA scheduling transmission resources, to any STA:CAP basis is M basic sub-band of described STA scheduling, the M that is scheduled the basic pairing M of a sub-band bit is set to first value, sends described bit group by a control signaling.After corresponding STA receives described control signaling, obtain to be used to indicate the bit group of basic dispatching sub-frequency band, learn that according to M the bit that is set to first value in the described bit group pairing M basic sub-band is scheduled; Transmission information on the described M that is scheduled a basic sub-band.

In order to further specify resource allocation indication scheme provided by the invention, provide a concrete up-downgoing dispatch field herein, be used to distribute up or the downlink transfer resource, referring to table 1.

Table 1

Wherein, use b5b4b3b2 to indicate the effective 20MHz sub-channel positions of this dispatch.b ₂=1 indication this time scheduling is effective to subchannel 0, otherwise invalid.b ₃=1 indication this time scheduling is effective to subchannel 1, otherwise invalid.b ₄=1 indication this time scheduling is effective to subchannel 2, otherwise invalid.b ₅=1 indication this time scheduling is effective to subchannel 3, otherwise invalid.

The embodiment of the invention provides a kind of simple resource assignation mode towards carrier aggregation, by in the resource allocation indication signaling, indicate this resource allocation indication to be applicable to which component carrier with bitmap, save the control signaling consumption, reduce control signaling detection complexity.

The implementation method that the present invention allows different STA of the bandwidth ability supported and CAP to communicate will be described in detail in detail below.

Described emission website can be modulated to data respectively on described M the basic sub-band, independent transmission on each basic sub-band.Described emission website also can modulate data on the frequency band of described M basic sub-band combination, transmits on the frequency band of described combination.Wherein, described M basic sub-band is continuous basic sub-band.Preferably, a plurality of emission websites also can adopt the mode of space division multiplexing to share same basic sub-band.

In the data transmission method that the embodiment of the invention provides, send data, then for each emission website is provided with carrier frequency offset respectively, with the centre carrier frequency of determining respectively to launch website as a plurality of emission websites.That is, described emission website can be by frequency spectrum shift with the radio frequency band of the data-modulated on described M the basic sub-band to appointment.Correspondingly, described receiving station receives the data of corresponding emission website on the radio frequency band of correspondence.

In the data transmission method provided by the invention, baseband portion adopts inverse fast fourier transform IFFT/ fast Fourier transform FFT to handle, and then receiving station adopts and the different FFT length of emission website:

If basic sub-band takies M basic sub-band with K point IFFT/FFT module if launch website, the IFFT/FFT block length of emission website is the M*K point, and the IFFT/FFT block length of receiving station is the N*K point.That is, described emission website is before carrying out frequency spectrum shift, and it is that the IFFT that M*K is ordered handles that data are carried out length; Described receiving station carries out length to the data that receive in described N basic sub-band scope be that the FFT that N*K is ordered handles.Wherein, K represents the number of the subcarrier that a basic sub-band comprises.

When described emission website carried out the IFFT processing, the specimen sample speed of employing was M*fs; When described receiving station carried out the FFT processing, the specimen sample speed of employing was N*fs.Fs represents the input specimen sample speed of the IFFT/FFT of a basic sub-band correspondence.

If the emission website is supported identical bandwidth with receiving station, IFFT/FFT sub-carrier number, the sampling rate of then launching website and receiving station are all identical.

If a plurality of emission websites are arranged in the system, the bandwidth difference that each emission website is supported, under the prerequisite that satisfies the band width configuration requirement, a plurality of emission websites can use band width configuration separately to send data to receiving station in the bandwidth range of receiving station support.

Described emission website only needed the data on M the basic sub-band are carried out the moulding Filtering Processing before carrying out frequency spectrum shift.And described receiving station carried out matched filter processing to the uniform data that receives and gets final product before carrying out the FFT processing in described N basic sub-band scope.

Preferably, the protection frequency band can be set at the sub-band edge,, reduce inter-user interference to reduce filtering requirements.The virtual subnet carrier wave can be set at the two ends of each sub-band.Preferably, also can the virtual subnet carrier wave be set at the two ends of the frequency band of described combination.

In the data transmission method that the embodiment of the invention provides, send data, the cyclic prefix CP length T of this wireless communication system is set as a plurality of emission websites _CPSatisfy following condition:

T _CP≥2δ+τ _m

Wherein 2 δ are that signal arrives the Round Trip Time Measurement that maximum covering radius experienced that allows, τ from the emission website _mThe multidiameter expansion.

Preferably, in the embodiment of the invention, the sub-band broadband can be 20MHz; And/or M=1,2,4; And/or K=256; And/or baseband sample sampling rate fs=20MHz.

Preferably, the value of M can be, M=2 ⁿ, n is a natural number.Preferably, the value of n can be n=0,1 or 2.

For making principle of the present invention, characteristic and advantage clearer, describe the present invention below in conjunction with specific embodiment.

Fig. 2 is the schematic block diagram of transmitting terminal and receiving terminal, and the embodiment of the invention only relates to the part of module of base band in transmitting terminal and the receiving terminal, and therefore, the module that the present invention does not relate in information source shown in Figure 2, radio frequency, the stay of two nights and the baseband portion does not repeat them here.

At first, the whole frequency band of system is divided into N basic sub-band, for each STA website use in the system.

In the present embodiment, the whole frequency band bandwidth of system is W=80MHz, it is divided into N=4 basic sub-band, each basic sub-band bandwidth B=20MHz, suppose that each basic sub-band can only be taken separately by an emission site STA, and a STA can use one or more basic sub-bands to transmit data to CAP.STA supports 20MHz, 40MHz and 80MHz bandwidth, and CAP supports 20MHz, 40MHz and 80MHz bandwidth, when CAP has 80MHz bandwidth receiving ability, can receive the data of norator combinations of bands transmission simultaneously.Site STA 1～the STA4 that Figure 3 shows that 4 20MHz bandwidth takies the baseband portion module frame chart of different sub-bands when the CAP of 80MHz bandwidth transmission data respectively.

Have 4 STA to send data to CAP shown in Fig. 3, represent with STA1～STA4, it is the 20MHz bandwidth that each STA takies a basic sub-band, and X1～X4 represents the data from corresponding STA.Only show when realizing being with the OFDM transmission among Fig. 3 and the closely-related module of IFFT/FFT more, other does not relate to does not influence a module in the complete transceiver yet, does not repeat them here such as coding, constellation point mapping, stream parsing, channel estimating, MIMO detection, decoding etc.

Sub-band division in the embodiment of the invention is shown in Fig. 4 (a).

Fig. 4 is the equivalent base band schematic diagram of sub-band division, for simplicity, can continue to use the negative frequency notion that the 802.11n standard is used; To positive frequency, but both in itself and indifference with the frequency spectrum shift of negative frequency.CAP uses [40MHz, 40MHz] frequency range 80MHz bandwidth altogether, centre frequency f0=0.Only illustrated the situation of STA single antenna among Fig. 4, be applicable to that equally also STA and CAP are that many antennas are monopolized sub-band and a plurality of STA situation by space division multiplexing shared Sub frequency band.

Fig. 4 (a) is depicted as the schematic diagram of 4 shared frequency bands of STA among Fig. 3, wherein, and f0=0, STA1 uses [40MHz ,-20MHz] frequency range, centre frequency f1=-30MHz, STA2 uses [20MHz, 0MHz] frequency range, centre frequency f2=-10MHz, STA3 uses [0MHz, 20MHz] frequency range, centre frequency f3=10MHz, STA4 uses [20MHz, 40MHz] frequency range, centre frequency f4=30MHz.

The signal model of the sub-band division shown in Fig. 4 (a) is described below.Walking abreast sends 4 road 20MHz signals, can separate the assurance quadrature to each road signal at frequency domain, promptly is modulated to respectively on nonoverlapping frequency range.Sub-carrier number Nfft (counting of IFFT/FFT conversion), sampling interval T _SAnd sample frequency f _SBetween corresponding relation as shown in the formula:

$\mathrm{Ts}=\frac{\mathrm{Tu}}{\mathrm{Nfft}}=\frac{1}{\mathrm{\ΔF}}\·\frac{1}{\mathrm{Nfft}}$

Tu represents the duration of OFDM symbol.Baseband signal centre frequency f _c=0, when its subcarrier spacing is Δ F=78.125kHz, the sub-carrier number Nfft that adopts in the present embodiment (counting of IFFT/FFT conversion), sampling interval T _SAnd sample frequency f _SBetween corresponding relation as shown in table 1.

Table 1

Bandwidth B	Sub-carrier number Nfft	Sampling interval T S	Sample frequency fs
				20MHz	256	50ns	20MHz
40MHz	512	25ns	40MHz
				80MHz
	1024	12.5ns	80MHz

Sample frequency fs in the table 1 is minimum sampling rate, can adjust employing greater than the value shown in the table 1.

In the present embodiment, the centre frequency of 4 road signals is respectively f ₁=-30MHz, f ₂=-10MHz, f ₃=10MHz, f ₁=30MHz just in time occupies one section continuous 80MHz channel, and the sub-carrier offset value of each road signal center frequency correspondence is respectively :-384 Δ F ,-128 Δ F, 128 Δ F, 384 Δ F.

With reference to Fig. 3 and Fig. 4 (a), in the present embodiment, the data of each STA are at first passed through the IFFT conversion of Nfft1=256 point (sub-carrier number), the sampling interval of baseband sample (sampling interval of IFFT module input sample point) is 50ns, pass through D/A (D/A partly comprises low-pass filtering) then, carry out frequency spectrum shift again, centre frequency is respectively f1～f4, f1=f0-30 wherein, f2=f0-10, f3=f0+10, f4=f0+30, unit is MHz, by other resume module of base band, received by CAP behind radio-frequency channel and the channel, the data that CAP receives are at first also through the processing of radio-frequency channel and other module of base band, and the baseband sample point sampling of CAP is 12.5ns at interval, the FFT conversion of ordering through Nfft2=1024 can be carried out subsequent treatment from the data that corresponding frequency band is taken out different STA.

Do not consider under the situation of time deviation, frequency departure, interference noise, suppose that the receiving terminal base band receives that the continuous signal of different carrier frequency is as follows:

$r\left(t\right)=\frac{1}{N}\{\underset{k=-128}{\overset{127}{\mathrm{\Σ}}}{W}_k\exp \left(j2\mathrm{\π}(k-384)\mathrm{\ΔFt}\right)+\underset{n=-128}{\overset{127}{\mathrm{\Σ}}}{X}_n\exp \left(j2\mathrm{\π}(n-128)\mathrm{\ΔFt}\right)$ (1)

$+\underset{k=-128}{\overset{127}{\mathrm{\Σ}}}{Y}_k\exp \left(j2\mathrm{\π}(k+128)\mathrm{\ΔFt}\right)+\underset{n=-128}{\overset{127}{\mathrm{\Σ}}}{Z}_n\exp \left(j2\mathrm{\π}(n+384)\mathrm{\ΔFt}\right)$

To signal sampling, get t=nT _s

$r\left(n\right){|}_{t={\mathrm{nT}}_s}=\frac{1}{N}\{\underset{k=-128}{\overset{127}{\mathrm{\Σ}}}{W}_k\exp \left(j2\mathrm{\π}(k-384){\mathrm{\ΔFnT}}_s\right)+\underset{n=-128}{\overset{127}{\mathrm{\Σ}}}{X}_n\exp \left(j2\mathrm{\π}(n-128){\mathrm{\ΔFnT}}_s\right)$

$+\underset{k-128}{\overset{127}{\mathrm{\Σ}}}{Y}_k\exp \left(j2\mathrm{\π}(k+128){\mathrm{\ΔFnT}}_s\right)+\underset{n=-128}{\overset{127}{\mathrm{\Σ}}}{Z}_n\exp \left(j2\mathrm{\π}(n+384){\mathrm{\ΔFnT}}_s\right)\}$ (2)

$=\frac{1}{N}\{\underset{k^{\′}=-512}{\overset{-257}{\mathrm{\Σ}}}{W}_{k^{\′}+384}\exp \left(j2\mathrm{\π}{k}^{\′}{\mathrm{\ΔFnT}}_s\right)+\underset{n^{\′}=-256}{\overset{-1}{\mathrm{\Σ}}}{X}_{n^{\′}+128}\exp \left(j2\mathrm{\π}{n}^{\′}{\mathrm{\ΔFnT}}_s\right)$

$+\underset{l^{\′}=0}{\overset{255}{\mathrm{\Σ}}}{Y}_{l^{\′}-128}\exp \left(j2\mathrm{\π}{l}^{\′}{\mathrm{\ΔFnT}}_s\right)+\underset{m^{\′}=256}{\overset{511}{\mathrm{\Σ}}}{Z}_{m^{\′}-384}\exp \left(j2\mathrm{\π}{m}^{\′}{\mathrm{\ΔFnT}}_s\right)\}$

To the receiver of 80MHz bandwidth, N=1024, $T_s=\frac{T_u}{N}=\frac{1}{\mathrm{N\ΔF}},$ The substitution following formula gets:

$r\left(n\right){|}_{t={\mathrm{nT}}_s}=\frac{1}{N}\left\{\underset{k=N/2}{\overset{N/2-1}{\mathrm{\Σ}}}{Q}_k\exp \left(j2\mathrm{\πk}\frac{n}{N}\right)\right\}---\left(3\right)$

R (n) is done 1024 FFT conversion can demodulation obtain signal W, X, Y, z.

For guaranteeing the signal period unanimity, to the signal of different bandwidth, the sampling rate difference of FFT module input data.Under the 20MHz bandwidth, 256 FFT, the sampling period should be 50ns; And under the 80MHz bandwidth, 1024 FFT, the sampling period is 12.5ns.

In the embodiment of the invention, group of subbands is used for each website altogether, such as, can two sub-frequency bands synthesize a use, or the synthetic frequency band of all group of subbands uses.Sub-band combination mode in the present embodiment is shown in Fig. 4 (b), Fig. 4 (c) and Fig. 4 (d).

Fig. 4 (b) is depicted as the sub-band division signal of the shared 80MHz frequency spectrum of STA of the STA of two 20MHz bandwidth and a 40MHz bandwidth, and the centre frequency of three sub-frequency bands is respectively f1=-30MHz, f2=0, f3=30MHz.In addition, Fig. 4 (b) also has two kinds of distortion, as shown in Figure 5.

Fig. 4 (c) is depicted as the sub-band division signal of the shared 80MHz frequency spectrum of STA of two 40MHz bandwidth, and the centre frequency of two sub-frequency bands is respectively f1=-20MHz, f2=20MHz.

The STA that Fig. 4 (d) is depicted as a 80MHz bandwidth takies the sub-band division signal of all 80MHz frequency spectrums, and the sub-band centre frequency is f1=0.

Wherein, Fig. 4 (b) is depicted as the situation of the shared 80MHz frequency spectrum of STA of the STA of two 20MHz bandwidth and a 40MHz bandwidth, and frequency band distributes also convertible, specifically as shown in Figure 5.

When CAP is configured to 40MHz or 80MHz bandwidth, allow in its frequency spectrum, to have idle basic sub-band or basic sub-band combination.

If the emission website is supported identical bandwidth with receiving station, IFFT/FFT sub-carrier number, the sampling rate of then launching site STA and receiving station are all identical;

If a plurality of emission websites are arranged in the system, the bandwidth difference that each emission website is supported, under the prerequisite that satisfies the band width configuration requirement, a plurality of emission websites can use band width configuration separately to send data to receiving station in the bandwidth range of receiving station support.

For example, if the system bandwidth available bandwidth is 40MHz, then CAP supports 40MHz, and STA supports 20MHz or 40MHz, and CAP supports that two STA transmit simultaneously.If system's available bandwidth is 20MHz, also this frequency band can be continued to divide, a part of resource in each STA service band, but the centre frequency of each STA is all identical with CAP, no longer additionally does frequency spectrum shift (centre frequency biasing).

The shared sub-band of each STA all has virtual subnet carrier wave separately, is arranged on the edge (two ends) of sub-band, is used for as the protection frequency band.Each STA only need do the molding filtration on its bandwidth of supporting separately, rather than the molding filtration on the whole W.And CAP does the molding filtration on the whole bandwidth W, so CAP can support the STA of different bandwidth configuration neatly.

In order to eliminate or to reduce to produce intersymbol interference (ISI to greatest extent, Inter-Symbol Interference) and multi-user interference, need synchronization mechanism reasonable in design in the system, specifically, introduce Cyclic Prefix (CP, Cyclic Prefix), and the length of cyclic prefix CP changes along with transmission mode, frame structure and corresponding protocol, needs to design the length of cyclic prefix CP in the system that meets the demands.In the embodiment of the invention, the emission site STA can be determined a time point t according to the synchronization preamble of downlink frame when receiving the downlink frame that receiving station CAP sends ₀, each STA is that benchmark calculates uplink constantly with the time point of estimating separately, the CP length in the design system has guaranteed to cover Round Trip Time Measurement 2 δs and the multidiameter extended by tau of distance STA farthest to CAP _m, consider time synchronization error again, then the multipath signal of all STA all can arrive STA in the CP scope, is unlikely to produce intersymbol interference (ISI) and multi-user interference.

In the embodiment of the invention, send data, the cyclic prefix CP length T of this wireless communication system is set as a plurality of emission websites _CPNeed satisfy following condition:

T _CP≥2δ+τ _m。

The embodiment of the invention also provides a kind of emission website, as shown in Figure 6, comprising:

Configuration module 61 is used for the information that the stored transmit website allows the M that takies basic sub-band: M≤N, N are the number of the basic sub-band that takies of receiving station, and M, N are positive integer; Send processing module 62, be used to modulate data on described M and send on the sub-band substantially.The configuration information of the basic sub-band of described M is that receiving station is its configuration.

Preferably, described configuration module 61 also is used for the band width configuration that the stored transmit website can be supported, it is more than or equal to the bandwidth of M basic sub-band.

Preferably, described configuration module 61 also is used for receiving the control signaling, resolves the bitmap that is used to indicate the basic sub-band that is scheduled in the described control signaling, learn one or more the basic sub-band that is scheduled, send dispatch command to described transmission processing module 62 according to this; Send processing module 62, be used for according to described dispatch command Data transmission on described one or more basic sub-band that is scheduled.

Preferably, described configuration module 61 also is used for receiving the control signaling, obtains to be used to indicate the bit group of basic dispatching sub-frequency band, the respectively corresponding basic sub-band of each bit wherein; Learn that according to the one or more bit that are set to first value in the described bit group pairing one or more basic sub-band is scheduled, and send dispatch command to described transmission processing module 62 according to this; Send processing module 62, be used for according to described dispatch command Data transmission on described one or more basic sub-band that is scheduled.

Preferably, described transmission processing module 62 can be modulated to data respectively on described M the basic sub-band independent transmission on each basic sub-band.

Preferably, described transmission processing module 62 also can modulate data on the frequency band of described M basic sub-band combination, transmits on the frequency band of described combination.Preferably, described M basic sub-band is continuous basic sub-band.

Preferably, described transmission processing module 62 can also adopt the mode of space division multiplexing and other emission websites to share same basic sub-band.

Preferably, described transmission processing module 62 comprises:

Frequency spectrum shift unit 624 is used for by frequency spectrum shift the radio frequency band of the data-modulated on described M the basic sub-band to appointment.

Preferably, described transmission processing module 62 also comprises:

Length is the IFFT processing unit 622 that M*K is ordered, and is used for data are carried out outputing to described frequency spectrum shift unit 624 after IFFT handles.Wherein, K represents the number of the subcarrier that a basic sub-band comprises.

Preferably, the input specimen sample speed of described IFFT processing unit 622 is M*fs.Fs represents the input specimen sample speed of the IFFT/FFT of a basic sub-band correspondence.

Preferably, described transmission processing module 62 also comprises:

Filter processing unit 623 is used for exporting described frequency spectrum shift unit 624 to after carrying out the moulding Filtering Processing through the data after the IFFT processing.

Preferably, described transmission processing module 62 comprises:

Subcarrier generation unit 621 can be provided with the virtual subnet carrier wave by the two ends at each sub-band, at described each sub-frequency bands edge the protection frequency band to be set.Shown in subcarrier generation unit 621, can also the virtual subnet carrier wave be set by two ends at the frequency band of the basic sub-band combination of described M, with two ends the virtual subnet carrier wave is set at the frequency band of described combination.

Preferably, the broadband of described basic sub-band is 20MHz.

Preferably, K=256.

Preferably, fs=20MHz.

Preferably, M=2n, n are natural number.Preferably, n=0,1 or 2.

The embodiment of the invention also provides a kind of data transmission system based on OFDM.This system can be used for the short-distance and medium-distance radio communication, and the available band of this system is divided into N basic sub-band.This system comprises: aforesaid emission website and being used for receives the receiving station of the data of sending from one or more emission website in the basic sub-band scope of N.If a plurality of emission websites are arranged in the system, the bandwidth difference that each emission website is supported, under the prerequisite that satisfies the band width configuration requirement, a plurality of emission websites can use band width configuration separately to send data to receiving station in the bandwidth range of receiving station support.

The embodiment of the invention also provides a kind of dispensing device of resource indication, as shown in Figure 7, comprising:

Scheduler module 701 is used to dispatch one or more subchannels;

Package module 702 links to each other with described scheduler module 701, is used for according to the one or more subchannels that are scheduled, and generates a control signaling, comprising the bitmap that is used to indicate the one or more subchannels that are scheduled;

Sending module 703 links to each other with described package module 702, is used to send described control signaling.

Wherein, described subchannel can be 1 subcarrier in the carrier aggregation system, perhaps, is a subchannel in the spectrum aggregating system.

Described resource indication can be that ascending resource is indicated, and also can be that downlink resource is indicated.

The embodiment of the invention also provides a kind of receiving system of resource indication, is used with above-mentioned resource indicating device, is used to receive the resource indication, comprising:

Receiver module 801 is used to receive a control signaling;

Parsing module 802 links to each other with described receiver module 801, is used for resolving described control signaling and is used to indicate the bitmap of the subchannel that is scheduled, and learns the one or more subchannels that are scheduled;

Sending module 803 links to each other with described parsing module 802, transmission information on the described one or more subchannels that are scheduled.

Wherein, described subchannel can be 1 subcarrier in the carrier aggregation system, perhaps, is a subchannel in the spectrum aggregating system.

Described resource indication can be that ascending resource is indicated, and also can be that downlink resource is indicated.

The embodiment of the invention also provides the dispensing device of another kind of resource indication, as shown in Figure 9, comprising:

Scheduler module 901 is used to be provided for indicating the bit of subchannel scheduling to organize the respectively corresponding subchannel of each bit wherein;

Package module 902 links to each other with described scheduler module 901, is used for the result according to the subchannel scheduling, and the pairing one or more bit of the one or more subchannels that are scheduled are set to first value;

Sending module 903 links to each other with described package module 902, is used for sending described bit group by a control signaling.

Wherein, described subchannel can be 1 subcarrier in the carrier aggregation system, also can be a subchannel in the spectrum aggregating system.

Described resource indication can be that ascending resource is indicated, and also can be that downlink resource is indicated.

The embodiment of the invention also provides a kind of receiving system of resource indication, is used with above-mentioned another kind of resource indicating device, is used to receive the resource indication, as shown in figure 10, comprising:

Receiver module 1001 is used to receive a control signaling;

Parsing module 1002 links to each other with described receiver module 1001, is used to resolve described control letter, obtains to be used to indicate the bit group of subchannel scheduling, the respectively corresponding subchannel of each bit wherein;

Sending module 1003 links to each other with described parsing module 1002, learns that according to the one or more bit that are set to first value in the described bit group pairing one or more subchannel is scheduled, and on the described one or more subchannels that are scheduled transmission information.

Wherein, described subchannel can be 1 subcarrier in the carrier aggregation system, also can be a subchannel in the spectrum aggregating system.

Described resource indication can be that ascending resource is indicated, and also can be that downlink resource is indicated.

In sum, technical scheme provided by the invention, use based on OFDM technology and sub-band combination, allow the emission site STA in the wireless communication system different band width configuration to be arranged with receiving station CAP, the emission site STA can adopt lower configuration to reduce hardware implementation cost, receiving station CAP then can adopt higher configuration to raise the efficiency: the availability of frequency spectrum, throughput etc., and can realize that a plurality of STA communicate with CAP simultaneously.In addition; having increased the protection frequency band at the edge of sub-band is virtual carrier; can avoid disturbing between sub-band; each sub-frequency bands can do molding filtration without help; and receiving terminal only need be done the matched filtering on the whole frequency band; need not a plurality of band receiver of base and do matched filtering, expanded Cyclic Prefix (CP), reduce the requirement of time synchronized at different sub-bands.Receiving terminal baseband sample sampling rate is N a times of basic subband samples sampling rate, guarantee an IFFT/FFT module that needs N1 to order on the basic sub-band, the IFFT/FFT module that receiving terminal is ordered with N2=N*N1, and do not need a plurality of parallel N1 point IFFT/FFT modules to come the information of each sub-frequency bands of demodulation.So both can improve availability of frequency spectrum system throughput, and can realize that a plurality of STA communicate with CAP simultaneously, and needn't increase the cost of system and user site equipment.

Though the present invention with preferred embodiment openly as above; but it is not to be used for limiting the present invention; any those skilled in the art are not breaking away from the spirit and scope of the invention; can make possible change and modification, so protection scope of the present invention should be as the criterion with the scope that claim of the present invention was defined.

Claims (50)

1. data transmission method based on OFDM is characterized in that:

The emission website takies M basic sub-band, modulates data on described M the basic sub-band to send;

Receiving station receives the data of sending from one or more emission website in N basic sub-band scope;

M≤N, M, N are positive integer.

2. data transmission method as claimed in claim 1 is characterized in that, also comprises:

Described receiving station carries out frequency-region signal to the data that receive to be separated, respectively to be launched the data that website sends.

3. data transmission method as claimed in claim 1 is characterized in that:

The bandwidth of described emission website support is less than or equal to the bandwidth that described receiving station is supported.

4. data transmission method as claimed in claim 1 is characterized in that:

Described emission website receives the control signaling, resolves wherein to be used to indicate the bitmap bitmap of the basic sub-band that is scheduled, and learns M the basic sub-band that is scheduled.

5. data transmission method as claimed in claim 4 is characterized in that, also comprises:

Described receiving station is M basic sub-band of emission website scheduling; Generate a control signaling, comprising the bitmap bitmap that is used to indicate one or more the basic sub-band that is scheduled; Send described control signaling.

6. data transmission method as claimed in claim 1 is characterized in that:

Described emission website receives the control signaling, obtains to be used to indicate the bit group of basic dispatching sub-frequency band, the respectively corresponding basic sub-band of each bit wherein; Learn that according to M the bit that is set to first value in the described bit group pairing M basic sub-band is scheduled.

7. data transmission method as claimed in claim 6 is characterized in that, also comprises:

Described receiving station is organized the respectively corresponding basic sub-band of each bit wherein for the emission website is provided for indicating the bit of basic dispatching sub-frequency band; According to the result of basic dispatching sub-frequency band, the M that is scheduled the basic pairing M of a sub-band bit is set to first value; By sending described bit group in the control signaling.

8. data transmission method as claimed in claim 1 is characterized in that:

The described cell site data of naming a person for a particular job are modulated on the basic sub-band of described M independent transmission on each basic sub-band respectively.

9. data transmission method as claimed in claim 1 is characterized in that:

Described cell site names a person for a particular job data-modulated to the frequency band of described M basic sub-band combination, transmits on the frequency band of described combination.

10. data transmission method as claimed in claim 9 is characterized in that:

Described M basic sub-band is continuous basic sub-band.

11. data transmission method as claimed in claim 1 is characterized in that:

A plurality of emission websites can adopt the mode of space division multiplexing to share same basic sub-band.

12. data transmission method as claimed in claim 1 is characterized in that:

Described emission website arrives the radio frequency band of appointment by frequency spectrum shift with the data-modulated on described M the basic sub-band.

13. data transmission method as claimed in claim 12 is characterized in that:

Described emission website is before carrying out frequency spectrum shift, and it is that the IFFT that M*K is ordered handles that data are carried out length;

Described receiving station carries out length to the data that receive in described N basic sub-band scope be that the FFT that N*K is ordered handles;

Wherein, K represents the number of the subcarrier that a basic sub-band comprises.

14. data transmission method as claimed in claim 13 is characterized in that:

When described emission website carried out the IFFT processing, the specimen sample speed of employing was M*fs;

When described receiving station carried out the FFT processing, the specimen sample speed of employing was N*fs;

Fs represents the input specimen sample speed of the IFFT/FFT of a basic sub-band correspondence.

15. data transmission method as claimed in claim 13 is characterized in that:

Described emission website also carried out the moulding Filtering Processing to the data after handling through IFFT before carrying out frequency spectrum shift;

Described receiving station also carried out matched filter processing to the data that receive in described N basic sub-band scope before carrying out the FFT processing.

16. data transmission method as claimed in claim 8 is characterized in that, also comprises, at each height

Band edge is provided with the protection frequency band, comprising:

At the two ends of described each sub-band the virtual subnet carrier wave is set.

17. data transmission method as claimed in claim 9 is characterized in that, also comprises, at described M

The edge of the frequency band of individual basic sub-band combination is provided with the protection frequency band, comprising:

Two ends at the frequency band of described combination are provided with the virtual subnet carrier wave.

18. data transmission method as claimed in claim 1 is characterized in that, the cyclic prefix CP length T of system _CPSatisfy following condition:

T _CP≥2δ+τ _m

Wherein 2 δ are that signal arrives the Round Trip Time Measurement that maximum covering radius experienced that allows, τ from the emission website _mBe the multidiameter expansion.

19. data transmission method as claimed in claim 1 is characterized in that, the broadband of described basic sub-band is 20MHz.

20. data transmission method as claimed in claim 13 is characterized in that, K=256.

21. data transmission method as claimed in claim 14 is characterized in that, fs=20MHz.

22. data transmission method as claimed in claim 1 is characterized in that, M=2 ⁿ, n is a natural number.

23. data transmission method as claimed in claim 22 is characterized in that, n=0,1 or 2.

24. an emission website is characterized in that, comprising:

Configuration module is used for the information that the stored transmit website allows the M that takies basic sub-band: M≤N, N are the number of the basic sub-band that takies of receiving station, and M, N are positive integer;

Send processing module, be used to modulate data on described M and send on the sub-band substantially.

25. emission website as claimed in claim 24 is characterized in that:

Described configuration module also is used for the band width configuration that the stored transmit website can be supported, it is more than or equal to the bandwidth of M basic sub-band.

26. emission website as claimed in claim 24 is characterized in that:

Described configuration module also is used to receive a control signaling, resolves the bitmap that is used to indicate the basic sub-band that is scheduled in the described control signaling, learns M the basic sub-band that is scheduled.

27. emission website as claimed in claim 24 is characterized in that:

Described configuration module also is used to receive a control signaling, obtains to be used to indicate the bit group of basic dispatching sub-frequency band, the respectively corresponding basic sub-band of each bit wherein; Learn that according to M the bit that is set to first value in the described bit group pairing M basic sub-band is scheduled.

28. emission website as claimed in claim 24 is characterized in that:

Described transmission processing module is modulated to data respectively on described M the basic sub-band independent transmission on each basic sub-band.

29. emission website as claimed in claim 24 is characterized in that:

Described transmission processing module modulates data on the frequency band of described M basic sub-band combination, transmits on the frequency band of described combination.

30. emission website as claimed in claim 29 is characterized in that:

Described M basic sub-band is continuous basic sub-band.

31. emission website as claimed in claim 24 is characterized in that:

Described transmission processing module adopts the mode of space division multiplexing and other emission websites to share same basic sub-band.

32. emission website as claimed in claim 24 is characterized in that, described transmission processing module comprises:

The frequency spectrum shift unit is used for by frequency spectrum shift the radio frequency band of the data-modulated on described M the basic sub-band to appointment.

33. emission website as claimed in claim 32 is characterized in that, described transmission processing module also comprises:

Length is the IFFT processing unit that M*K is ordered, and is used for data are carried out outputing to described frequency spectrum shift unit after IFFT handles;

Wherein, K represents the number of the subcarrier that a basic sub-band comprises.

34. emission website as claimed in claim 33 is characterized in that:

The input specimen sample speed of described IFFT processing unit is M*fs;

Fs represents the input specimen sample speed of the IFFT/FFT of a basic sub-band correspondence.

35. emission website as claimed in claim 33 is characterized in that, described transmission processing module also comprises:

Filter processing unit is used for exporting described frequency spectrum shift unit to after carrying out the moulding Filtering Processing through the data after the IFFT processing.

36. emission website as claimed in claim 28 is characterized in that, described transmission processing module comprises:

The subcarrier generation unit is provided with the virtual subnet carrier wave by the two ends at each sub-band, at described each sub-frequency bands edge the protection frequency band to be set.

37. emission website as claimed in claim 29 is characterized in that, described transmission processing module comprises:

The subcarrier generation unit is provided with the virtual subnet carrier wave by the two ends at the frequency band of the basic sub-band combination of described M, with the two ends at the frequency band of described combination the virtual subnet carrier wave is set.

38. emission website as claimed in claim 24 is characterized in that, the broadband of described basic sub-band is 20MHz.

39. emission website as claimed in claim 33 is characterized in that K=256.

40. emission website as claimed in claim 34 is characterized in that fs=20MHz.

41. emission website as claimed in claim 24 is characterized in that M=2 ⁿ, n is a natural number.

42. emission website as claimed in claim 41 is characterized in that, n=0,1 or 2.

43. the sending method of a resource indication is characterized in that, comprising:

Dispatch one or more subchannels;

Generate a control signaling, comprising the bitmap that is used to indicate the one or more subchannels that are scheduled;

Send described control signaling.

44. the dispensing device of a resource indication is characterized in that, comprising:

Scheduler module is used to dispatch one or more subchannels;

Package module is used to generate a control signaling, comprising the bitmap that is used to indicate the one or more subchannels that are scheduled;

Sending module is used to send described control signaling.

45. the method for reseptance of a resource indication is characterized in that, comprising:

Receive a control signaling, parsing wherein is used to indicate the bitmap of the subchannel that is scheduled, and learns the one or more subchannels that are scheduled;

Transmission information on the described one or more subchannels that are scheduled.

46. the receiving system of a resource indication is characterized in that, comprising:

Receiver module is used to receive a control signaling,

Parsing module is used for resolving described control signaling and is used to indicate the bitmap of the subchannel that is scheduled, and learns the one or more subchannels that are scheduled;

Sending module, transmission information on the described one or more subchannels that are scheduled.

47. the sending method of a resource indication is characterized in that, comprising:

Be provided for indicating the bit group of subchannel scheduling, the respectively corresponding subchannel of each bit wherein;

According to the result of subchannel scheduling, the pairing one or more bit of the one or more subchannels that are scheduled are set to first value;

By sending described bit group in the control signaling.

48. the dispensing device of a resource indication is characterized in that, comprising:

Scheduler module is used to be provided for indicating the bit of subchannel scheduling to organize the respectively corresponding subchannel of each bit wherein;

Package module is used for the result according to the subchannel scheduling, and the pairing one or more bit of the one or more subchannels that are scheduled are set to first value;

Sending module is used for sending described bit group by a control signaling.

49. the method for reseptance of a resource indication is characterized in that, comprising:

Receive a control signaling;

Acquisition is used to indicate the bit group of subchannel scheduling, the respectively corresponding subchannel of each bit wherein;

Learn that according to the one or more bit that are set to first value in the described bit group pairing one or more subchannel is scheduled;

Transmission information on the described one or more subchannels that are scheduled.

50. the receiving system of a resource indication is characterized in that, comprising:

Receiver module is used to receive a control signaling;

Parsing module is used to obtain to be used to indicate the bit of subchannel scheduling to organize the respectively corresponding subchannel of each bit wherein;

Sending module, the one or more bit that are used for being set to according to described bit group first value learn that pairing one or more subchannel is scheduled, and on the described one or more subchannels that are scheduled transmission information.

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