CN101056292A - Time frequency resource allocation method, device and base station and radio communication device applying same - Google Patents
Time frequency resource allocation method, device and base station and radio communication device applying same Download PDFInfo
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Abstract
The invention discloses the time resource allocation frequently method in the wireless communication system, which includes: A. the work bandwidth is divided into subbands greater than one, and every district selects at least one subband as the dominant frequency subband of this district, and the remainder is used as vice frequency subband of this district; B. distribute the dominant frequency subband of every district to the dispersion transmission of this district or concentrated transmission, distribute the vice frequent subband of every district to the dispersion transmission of this district or concentrated transmission. The invention also discloses the time resource allocation device of wireless communication system and basic station and wireless communication system using same. After using the invention, it can concentrate the dispersion transmission subband on the dominant frequency subband or vice subband as far as possible or, consequently when adopting soft frequency reuse, dispersion transmission user can take the frequency resource as many as possible, so, it can improve the diversity performance evidently.
Description
Technical field
The present invention relates to wireless communication technology field, more particularly, relate to distribution method of time frequency resources, device and use its base station and wireless communication system.
Background technology
Two third-generation mobile communications are main access technology with time division multiple access (TDMA) and Narrowband CDMA (CDMA), for example global mobile communication (GSM) system and CDMA IS-95 mobile communication system.3 g mobile communication is main access technology with wideband CDMA, for example universal mobile telecommunications system (UMTS) and WCDMA mobile communication system.In CDMA technology, a user's data symbol will take all carrier frequency width, and different user or user data are distinguished by spreading code.Because multipath channel has been destroyed the orthogonality between the spreading code, makes CDMA technology become the system of a self-interference, therefore, power system capacity and spectrum efficiency can't satisfy the requirement of broadband wireless communications.
Next generation mobile communication Technology Need support voice, data, audio frequency, video, image etc. are type of service widely.In order to support the multiple business type, require the higher data rate of next generation mobile communication system support, higher spectrum efficiency, perfect service quality (QoS) security mechanism, provide better mobility support and wireless network to cover, be embodied as the target that the user provides communication service whenever and wherever possible.
Since the nineties in 20th century, multi-transceiver technology becomes the hot spot technology of broadband wireless communications, its basic thought is that a bandwidth carrier is divided into a plurality of subcarriers, and on a plurality of subcarriers, transmit data simultaneously, in the middle of the system applies of majority, the width of subcarrier is less than the relevant width of channel, like this on frequency-selective channel, decline on each subcarrier is a flat fading, so just reduced intersymbol interference, and do not need complicated channel equalization, be fit to the transmission of high-speed data.Multi-transceiver technology has various ways, directly expands CDMA (MC-DS-CDMA), multi-tone CDMA (MT-CDMA), multicarrier TDMA (MC-TDMA), time-frequency domain two-dimensional expansion and the multiple expansion technique on above basis as OFDM (OFDM), CDMA multiple carrier (MC-CDMA), multicarrier.
The OFDM technology is more representational a kind of technology in the multi-transceiver technology.In the OFDM technology, in frequency domain, given channel is divided into many orthogonal sub-channels, and allows subcarrier spectrum to overlap, as long as satisfy between subcarrier mutually orthogonally, just can isolate data-signal from the subcarrier of aliasing.
Figure 1A shows user data transmission schematic diagram in the OFDM technology, shown in Figure 1A, user data at first passes through chnnel coding and interleaving treatment, and adopt some modulator approaches, as two-phase system phase shift keyed signal (BPSK, Binary Phase Shift Keying) modulation, four-phase shift key control signals (QPSK, Quaternary Phase Shift Keying) modulation, quadrature amplitude modulation (QAM, Quadrature Amplitude Modulation) etc. form symbol, operation being modulated on the radio frequency through OFDM then.In the OFDM operation, at first symbol is carried out the serial conversion, form the sub data flow of a plurality of low speed, each data flow takies a subcarrier; Sub data flow can pass through inverse discrete fourier transform (IDFT) or inverse fast fourier transform (IFFT) realization to the mapping of subcarrier; Simultaneously the OFDM technology uses Cyclic Prefix (CP) as protection at interval, significantly reduces even has eliminated intersymbol interference, and guaranteed the orthogonality of each interchannel, thereby significantly reduced the phase mutual interference of interchannel.
From beginning in 1993, the technology that strong multi-carrier modulation combines with CDMA has appearred successively, usually these technology are divided into frequency domain expansion and time domain expansion two big classes at present, shown in Figure 1B, user data through chnnel coding, interweaving and modulate the back forms symbol, the symbol of formation carry out OFDM operate before the expansion of frequency domain or time domain.If only symbol is carried out frequency domain expansion, then be called MC-CDMA; If only symbol is carried out the time domain expansion, then is called MC-DS-CDMA; If frequency domain expansion and time domain expansion that symbol is carried out exist simultaneously, then be called the multi-transceiver technology of time-frequency domain two-dimensional expansion.
By above description as seen, the mapping of multicarrier realizes by IDFT or IFFT, and frequency spectrum overlaps each other and keeps quadrature between each subcarrier, and can overcome intersymbol interference by using Cyclic Prefix.In the OFDM technology, also can accelerate the attenuation outside a channel of subcarrier spectrum by the method for windowing, also exist some technological means to avoid using Cyclic Prefix.Like this, user data transmission is shown in Fig. 1 C in the multi-transceiver technology, user data at first passes through modulation treatment, this modulation treatment can comprise chnnel coding, interweaves, symbol-modulated and sequence of operations such as time domain and/or frequency domain expansion,, be mapped to a plurality of subcarriers with certain technological means and get on after having carried out the serial conversion by the data that obtain after the modulation treatment, these subcarriers can be quadrature, also can be non-orthogonally, and then be modulated to radio frequency and get on through parallel/serial.
The OFDM technology was proposed first in middle 1960s, but in quite a long time after this, the OFDM technology never forms large-scale the application.The development of OFDM technology has at that time run into and much has been difficult to the problem that solves, at first, the OFDM operation requires between each subcarrier mutually orthogonal, although can realize this modulation system well by fast Fourier transform (FFT) in theory, but in actual applications, according to the technological means that provided at that time, so complicated real-time Fourier transformation equipment can't realized at that time at all.In addition, the factors such as linearity requirement of the stability of transmitting oscillator and receiver oscillator and radio-frequency power amplifier also become the restriction condition that realizes the OFDM technology.Since the eighties in 20th century, the development of large scale integrated circuit technology has solved the problem of implementation of FFT, and along with the development of Digital Signal Processing (DSP) technology, the OFDM technology begins to transform to practical application from theory.
The OFDM technology relies on its intrinsic focus that the stronger resistance of time delay expansion and higher spectrum efficiency two big advantages are become research rapidly, and adopted by a plurality of international norm, all adopt the OFDM technology as systems such as European digital audio broadcast (DAB), European digital video broadcasting (DVB), high performance radio local area network (HIPERLAN, High Performance Local Area Network), Institute of Electrical and Electric Engineers (IEEE) 802.11 WLAN (wireless local area network), IEEE802.16 wireless MANs.In the third generation partner program of holding in 2004 (3GPP, 3rd Generation PartnershipProject) Radio Access Network (RAN, the Radio Access Network) meeting, multi-transceiver technology becomes the access technology of main discussion.
Because frequency duplex factor as one in interference-limited cdma system is 1, spectrum efficiency height so not only, and do not need to carry out frequency planning, simplified the network planning.But in multicarrier system, frequency duplex factor as one 1 can not reach optimum spectrum efficiency.
In multicarrier system, a plurality of users are together multiplexing by taking different running time-frequency resources.Point out that in 3GPP technical report 25.814 SC-FDMA technology and OFDMA technology are adopted in the up-downgoing of EUTRA system respectively.This report is also mentioned, no matter up-downgoing, user data can have two kinds of multiplex modes, i.e. concentration of transmissions (Localized Transmission) and dispersion transmission (DistributedTransmission).The former is combined into minimum running time-frequency resource unit with the adjacent sub-carrier (subband) of the interior some of certain hour unit's (for example time slot) and distributes to the user, shown in Fig. 2 A; The synthetic minimum running time-frequency resource unit of sub carrier group that the latter disperses some in the certain hour unit distributes to the user, to reach the effect of frequency diversity.Wherein disperse transmission that two kinds of forms can be arranged again, a kind of is non-frequency-hopping mode, and promptly the user is in certain hour unit, and the sub-carrier positions that takies on adjacent symbol is the same, shown in Fig. 2 B; Another kind is a frequency-hopping mode, and promptly the sub-carrier positions that takies on different symbols of user can change, shown in Fig. 2 C.The grey grid is represented the running time-frequency resource of a CU among Fig. 2 A-2C, and cps is one or adjacent several subcarriers.
Number be 200510067540.2 in Chinese patent application, the application name is called in the patent application of " a kind of method that realizes frequency soft multiplexing in wireless communication system ", the applicant has proposed a kind of scheme of frequency soft multiplexing.In this scheme, kept frequency duplex factor as one 1 in inside, sub-district, then plan the interference that reduces between the sub-district at cell boarder, with communication quality and the spectrum efficiency of improving cell boarder by the frequency grouping.Concrete way is: all subcarriers are divided into the N group, and each cell selecting one group of boss's carrier wave wherein as this sub-district, other subcarriers are provided with different transmitting power thresholdings to boss's carrier wave and auxiliary son carrier waves respectively as the auxiliary son carrier waves of this sub-district.Usually, the transmitting power thresholding of boss's carrier wave is higher than the transmitting power thresholding of auxiliary son carrier waves.By being that neighbor cell selects different boss's carrier waves, and distribute the bigger boss's carrier wave of power for the user of cell boarder, reduce the interference of cell boarder.
According to this method, for cell boarder, the multiplexing factor of frequency of utilization is 3 frequency reuse plan, and for inside, sub-district, the multiplexing factor of frequency of utilization is 1 frequency reuse plan, because to sub-district internal limitations transmitting power, forms the multiplexing factor and is 1 isolated island and cover.By zones of different different frequency duplex factor as one is set, has solved the interference problem of neighbor cell under the continuous coverage condition on the one hand, improved the traffic rate of cell boarder a sub-district; Made full use of valuable frequency resource on the other hand, realized high rate communication, the method according to this application proposes can solve the interference problem of minizone by a kind of controllable mode, help the RRM implementation of strategies, make that the operation of network is more stable.
Yet, when adopting the scheme of frequency soft multiplexing, owing to independently carry out respectively cutting apart of major-minor subcarrier with user's resource allocation, cause distributing in the resource of unique user the situation that not only comprises boss's carrier wave but also comprise auxiliary son carrier waves easily, this obviously runs counter to the original intention of soft multiplexing scheme, also just can not solve the interference problem of cell boarder.Such as, in the specific implementation of a soft-frequency reuse, the notion of basic frequency subband (dominant frequency band) and side frequency subband (subband) being proposed, the subband width in the width of these subbands and the prior art scheme is consistent.Because the division of dominant frequency subband and secondary subband frequently still independently is carried out respectively with the division that disperses transmission subband and concentration of transmissions subband, make in the transmission subband of the same race the situation that not only comprises the dominant frequency subband but also comprise secondary frequency subband still exist.Though can solve the problem that concentration of transmissions combines with frequency soft multiplexing by taking all factors into consideration transmitting power and channel condition, but for disperseing transmission, unique user can only take dominant frequency subband or the secondary subband frequently that disperses in the transmission subband, thereby has greatly limited user's diversity performance.Especially for the cell boundary users that must use dominant frequency because the dominant frequency subband is less, be arranged in disperse the transmission subband the dominant frequency subband just still less, this problem is just outstanding further.
Summary of the invention
In view of this, main purpose of the present invention is the distribution method of time frequency resources that proposes in a kind of wireless communication system, so that when adopting soft-frequency reuse, dispersion transmission user is the acquisition frequency resource as much as possible, thereby improves diversity performance.
For achieving the above object, technical scheme of the present invention is achieved in that
Distribution method of time frequency resources in a kind of wireless communication system, this method comprises:
A, bandwidth of operation is divided into subband greater than one, at least one subband of each cell selecting is as the dominant frequency subband of this sub-district, and remainder is as the secondary subband frequently of this sub-district;
B, the dispersion transmission or the concentration of transmissions of giving this sub-district with the dominant frequency allocation of subbands of each sub-district, the dispersion transmission or the concentration of transmissions of giving this sub-district with the secondary allocation of subbands frequently of each sub-district.
Described step B comprises: for disperseing the transmission subband, and is the concentration of transmissions subband with all secondary allocation of subbands frequently with all dominant frequency allocation of subbands.
Described step B comprises: with all dominant frequency allocation of subbands is the concentration of transmissions subband, and all secondary allocation of subbands frequently are dispersion transmission subband.
Described step B comprises: whole working bandwidth is assigned as disperses the transmission subband, perhaps whole working bandwidth is assigned as the concentration of transmissions subband.
Described step B comprises: only distribute the dominant frequency subband or only distribute secondary subband frequently to give same data block.
Described steps A comprises: when dominant frequency subband number increases, under the prerequisite that does not influence interference coordination, keep dominant frequency subband number dominant frequency subband hour as new dominant frequency subband.
Described steps A comprises: select a subband or more than one and the equally distributed subband dominant frequency subband as this sub-district.
Time-frequency resource allocating device in a kind of wireless communication system, this device comprises:
Major-minor frequency band division module is used for bandwidth of operation is divided into subband greater than one, and at least one subband of each cell selecting is as the dominant frequency subband of this sub-district, and remainder is as the secondary subband frequently of this sub-district;
Transmission sub-band division module is used for the dominant frequency allocation of subbands of each sub-district is given the dispersion transmission or the concentration of transmissions of this sub-district, the dispersion transmission or the concentration of transmissions of giving this sub-district with the secondary allocation of subbands frequently of each sub-district;
Described major-minor frequency band division module is connected with transmission sub-band division module.
Described transmission sub-band division module is used for all dominant frequency allocation of subbands for disperseing the transmission subband, and is the concentration of transmissions subband with all secondary allocation of subbands frequently.
Described transmission sub-band division module, being used for all dominant frequency allocation of subbands is the concentration of transmissions subband, and all secondary allocation of subbands frequently are dispersion transmission subband.
Described transmission sub-band division module is used for whole working bandwidth is assigned as dispersion transmission subband, perhaps is used for whole working bandwidth is assigned as the concentration of transmissions subband.
Described wireless communication system is a multi-carrier wireless communications system.
A kind of base station, this base station comprise the time-frequency resource allocating device in as above each described wireless communication system.
A kind of wireless communication system, this system comprise the base station and with the travelling carriage of base station communication,
Wherein said base station comprises the time-frequency resource allocating device in as above each described wireless communication system, and described base station is used for distributing to the running time-frequency resource information notice travelling carriage of dominant frequency subband, secondary subband frequently, concentration of transmissions and dispersion transmission;
Travelling carriage is used for the time-frequency position that according to described running time-frequency resource information adjustment is used to the information that receives.
From technique scheme as can be seen, in the present invention, with bandwidth of operation as operand.The bandwidth of operation here is commonly referred to as system bandwidth, for example 1.25M, 2.5M, 5M, 10M, 20M bandwidth; Also can refer to independently frequency band of interior a section of dividing of system bandwidth, each such separate bands all has own specific customer group in a regular time (for example subframe), that is same user can not take two or more bandwidth of operation simultaneously.Modal situation is the bandwidth of operation that the system bandwidth of 20M is divided into two 10M.
In the present invention, at first bandwidth of operation is divided into the subband greater than, at least one subband of each cell selecting is as the dominant frequency subband of this sub-district, and remainder is as the secondary subband frequently of this sub-district; Then the dominant frequency allocation of subbands of each sub-district is given the dispersion transmission or the concentration of transmissions of this sub-district, the dispersion transmission or the concentration of transmissions of giving this sub-district with the secondary allocation of subbands frequently of each sub-district.Therefore, use after the present invention, when distributing running time-frequency resource, considered also that simultaneously the major-minor of frequency soft multiplexing is divided frequently for the user, make both to organically combine, so can will disperse the transmission subband to concentrate on the dominant frequency subband or concentrate on secondary subband frequently as far as possible as far as possible.Therefore, when adopting soft-frequency reuse, behind application the present invention, dispersion transmission user is the acquisition frequency resource as much as possible, thereby improves diversity performance significantly.
Description of drawings
Figure 1A shows user data transmission schematic diagram in the OFDM technology;
Figure 1B shows user data transmission schematic diagram in frequency domain/time domain expansion technique;
Fig. 1 C shows user data transmission schematic diagram in the multi-transceiver technology;
Fig. 2 A shows the one exemplary embodiment of concentration of transmissions;
Fig. 2 B shows the one exemplary embodiment of disperseing the non-frequency-hopping mode of transmission;
Fig. 2 C shows the one exemplary embodiment of disperseing the transmission frequency-hopping mode;
Fig. 3 shows according to the present invention the exemplary flow schematic diagram of the distribution method of time frequency resources in the wireless communication system;
Fig. 4 A is the one exemplary embodiment according to the time-frequency resource allocating of first embodiment of the invention;
Fig. 4 B is the one exemplary embodiment according to the time-frequency resource allocating of second embodiment of the invention;
Fig. 4 C is the one exemplary embodiment according to the time-frequency resource allocating of third embodiment of the invention;
Fig. 4 D is the one exemplary embodiment according to the time-frequency resource allocating of fourth embodiment of the invention;
Fig. 4 E is the one exemplary embodiment according to the time-frequency resource allocating of fifth embodiment of the invention;
Fig. 5 is the structural representation of the time-frequency resource allocating device of the one exemplary embodiment according to the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention express clearlyer, the present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Main thought of the present invention is: when distributing running time-frequency resource for the user, consider the major-minor frequency dividing mode of frequency soft multiplexing simultaneously, make and distribute the major-minor of running time-frequency resource and frequency soft multiplexing to divide mutual combination frequently, thereby improve systematic function.Just, at first bandwidth of operation is divided into the subband greater than, at least one subband of each cell selecting is as the dominant frequency subband of this sub-district, and remainder is as the secondary subband frequently of this sub-district; Then, the dispersion transmission or the concentration of transmissions of giving this sub-district with the dominant frequency allocation of subbands of each sub-district, the dispersion transmission or the concentration of transmissions of giving this sub-district with the secondary allocation of subbands frequently of each sub-district.
Fig. 3 shows according to the present invention the exemplary flow schematic diagram of the distribution method of time frequency resources in the wireless communication system.As shown in Figure 3, this exemplary flow comprises:
Step 301: bandwidth of operation is divided into subband greater than one, and at least one subband of each cell selecting is as the dominant frequency subband of this sub-district, and remainder is as the secondary subband frequently of this sub-district.
Here, with bandwidth of operation as operand.The bandwidth of operation here is commonly referred to as system bandwidth, for example 1.25M, 2.5M, 5M, 10M, 20M bandwidth; Also can refer to independently frequency band of interior a section of dividing of system bandwidth, each such separate bands all has own specific customer group in a regular time (for example subframe), that is same user can not take two or more bandwidth of operation simultaneously.Wherein preferably select a subband or more than one and equally distributed subband dominant frequency subband as this sub-district.And, preferably when dominant frequency subband number increases, under the prerequisite that does not influence interference coordination, keep dominant frequency subband number dominant frequency subband hour as new dominant frequency subband.
Step 302: respectively dominant frequency subband and secondary subband are frequently carried out resource allocation, the dispersion transmission and/or the concentration of transmissions of giving this sub-district with the dominant frequency allocation of subbands of each sub-district, the dispersion transmission and/or the concentration of transmissions of giving this sub-district with the secondary allocation of subbands frequently of each sub-district.
, preferably can distribute all dominant frequency subbands here, and distribute all secondary subbands frequently as disperseing the transmission subband as the concentration of transmissions subband; Perhaps, also can distribute all dominant frequency subbands to transmit subband, and distribute all secondary subbands frequently as the concentration of transmissions subband as disperseing.
Preferably, whole working bandwidth is assigned as the concentration of transmissions subband.
Preferably, whole working bandwidth is assigned as dispersion transmission subband.Wherein, preferably give the dispersion transmission user that needs high-power emission or reception with all dominant frequency allocation of subbands.
Preferably, when disperseing transmission must take dominant frequency and band occupancy number to be less than dominant frequency subband number, distribute a part of dominant frequency band, distribute all the other frequency bands as the concentration of transmissions subband as disperseing the transmission subband.
Preferably, when disperseing transmission must take dominant frequency, and the band occupancy number distributes the secondary subband frequently of all dominant frequency subbands and a part as disperseing the transmission subband during more than dominant frequency subband number, distributes all the other frequency bands as the concentration of transmissions subband.Wherein, preferably give the dispersion transmission user that needs high-power emission or reception with all dominant frequency allocation of subbands.
Preferably, frequently secondary when disperseing transmission only to take, and the band occupancy number distributes the secondary subband frequently of a part as disperseing the transmission subband when being less than secondary subband number frequently, distributes all the other frequency bands as the concentration of transmissions subband.
Preferably, step 302 distribute a subband or more than one and equally distributed subband as disperseing the transmission subband.And, preferably when disperseing transmission subband number to increase, keep and disperse transmission subband number dispersion transmission subband hour as new dispersion transmission subband.And the described dispersion transmission of step 302 can be again that frequency-hopping mode disperses transmission for non-frequency-hopping mode disperses transmission both.
In the various methods of salary distribution, one of them more preferably embodiment concentration of transmissions subband and the division of the division that disperses the transmission subband with major-minor frequency subband are consistent fully.Promptly distribute all dominant frequency subbands as the concentration of transmissions subband, distribute all secondary subbands frequently as disperseing the transmission subband; Perhaps distribute all dominant frequency subbands as disperseing the transmission subband, distribute all secondary subbands frequently as the concentration of transmissions subband.
In the various methods of salary distribution, preferably only distribute the dominant frequency subband or only distribute secondary subband frequently to give same data block.
Wireless communication system herein is preferably multi-carrier wireless communications system, more preferably, described multi-carrier wireless communications system is an orthogonal frequency division multiplexing radio communication system, or be the MC-CDMA wireless communication system, or directly expand code division multi-address radio communication system for multicarrier, or be the multi-tone code division multi-address radio communication system, or be the multicarrier time-division multiple access wireless communication system, or be time-frequency domain two-dimensional expansion multi-carrier wireless communications system.
Fig. 4 A is the one exemplary embodiment according to the time-frequency resource allocating of first embodiment of the invention.First embodiment distributes a part of dominant frequency band as disperseing the transmission subband corresponding to when disperseing transmission must take dominant frequency and band occupancy number to be less than dominant frequency subband number, distributes the situation of all the other frequency bands as the concentration of transmissions subband.Fig. 4 B is the one exemplary embodiment according to the time-frequency resource allocating of second embodiment of the invention, and second embodiment be corresponding to can distributing all dominant frequency subbands as disperseing the transmission subband, and distributes all secondary subbands frequently as the concentration of transmissions subband; Fig. 4 C is the one exemplary embodiment according to the time-frequency resource allocating of third embodiment of the invention, the 3rd embodiment is corresponding to taking dominant frequency when disperseing to transmit, and the band occupancy number is during more than dominant frequency subband number, distribute the secondary subband frequently of all dominant frequency subbands and a part as disperseing the transmission subband, distribute the situation of all the other frequency bands as the concentration of transmissions subband; Fig. 4 D is the one exemplary embodiment according to the time-frequency resource allocating of fourth embodiment of the invention, the 4th embodiment is corresponding to frequently secondary when disperseing transmission only to take, and when the band occupancy number is less than pair frequency subband number, distribute the secondary subband frequently of a part as disperseing the transmission subband, distribute the situation of all the other frequency bands as the concentration of transmissions subband; Fig. 4 E is the one exemplary embodiment according to the time-frequency resource allocating of fifth embodiment of the invention, and the 5th embodiment distributes all dominant frequency subbands as the concentration of transmissions subband corresponding to working as, and distributes all secondary subbands frequently as the situation of disperseing to transmit subband.
In the example shown in Fig. 4 A-4E, bandwidth of operation is divided into several subbands, and is the dominant frequency subband, and these subbands evenly distribute 1/3 sub-band division.In first embodiment, disperse transmission to take 1/6 of total resources, and all at the dominant frequency subband; In a second embodiment, disperse transmission to take 1/3 of total resources, and all at the dominant frequency subband; In the 3rd embodiment, disperse transmission to take 2/3 of total resources, wherein half is at the dominant frequency subband, and half is at pair frequency subband; In the 4th embodiment, disperse transmission to take 1/3 of total resources, and all at pair frequency subband; In the 5th embodiment, disperse transmission to take 2/3 of total resources, and all at pair frequency subband.In these examples, the subband that disperses transmission to take relatively is evenly distributed in whole frequency domain.Fig. 4 A-4E middle twill region representation disperses the transmission subband, and all the other white spaces are represented the concentration of transmissions subband.
In addition, in the 6th embodiment, disperse transmission can also take whole bandwidth of operation; In the 7th embodiment, concentration of transmissions can also take whole bandwidth of operation.
In addition, though it will be appreciated by those of skill in the art that the above embodiment of having listed frequency band division and bandwidth assignment, the present invention is not limited thereto, but can have various forms of implementation.
Simultaneously, the invention allows for time-frequency resource allocating device in a kind of wireless communication system.Fig. 5 is the structure chart of the time-frequency resource allocating device 500 in the wireless communication system of the one exemplary embodiment according to the present invention.As shown in Figure 5, this device 500 comprises:
Major-minor frequency band division module 501 is used for bandwidth of operation is divided into subband greater than one, and at least one subband of each cell selecting is as the dominant frequency subband of this sub-district, and remainder is as the secondary subband frequently of this sub-district;
Transmission sub-band division module 502, be used for respectively dominant frequency subband and secondary subband frequently being carried out resource allocation, the dispersion transmission and/or the concentration of transmissions of giving this sub-district with the dominant frequency allocation of subbands of each sub-district, the dispersion transmission and/or the concentration of transmissions of giving this sub-district with the secondary allocation of subbands frequently of each sub-district.
Described major-minor frequency band division module 501 is connected with transmission sub-band division module 502.
Preferably, transmission sub-band division module 502 can be used for all dominant frequency allocation of subbands for disperseing the transmission subband, and is the concentration of transmissions subband with all secondary allocation of subbands frequently, be the concentration of transmissions subband perhaps, and all secondary allocation of subbands frequently are dispersion transmission subband all dominant frequency allocation of subbands.
Preferably, transmission sub-band division module 502, can be used for whole working bandwidth is assigned as dispersion transmission subband, preferably, transmission sub-band division module 502 can also be used for dominant frequency allocation of subbands is wherein given the dispersion transmission user of high-power emission of needs or reception.
Preferably, transmission sub-band division module 502 can be used for whole working bandwidth is assigned as the concentration of transmissions subband.
Preferably, transmission sub-band division module 502 can be used for distributing a part of dominant frequency subband to transmit subband as disperseing when disperseing transmission must take dominant frequency and band occupancy number to be less than dominant frequency subband number, distributes all the other frequency bands as the concentration of transmissions subband.
Preferably, transmission sub-band division module 502, can also be used for when disperseing transmission must take dominant frequency and band occupancy number more than dominant frequency subband number, distribute the secondary subband frequently of all dominant frequency subbands and a part as disperseing the transmission subband, distribute all the other frequency bands as the concentration of transmissions subband, preferably, transmission sub-band division module 502 can also be used for transmitting family again for the dispersion of high-power emission of needs or reception dominant frequency allocation of subbands wherein.
Preferably, transmission sub-band division module 502 can also be used for distributing the secondary subband frequently of a part to transmit subband as disperseing when disperseing transmission only to take frequently secondary and band occupancy number when being less than secondary subband number frequently, distributes all the other frequency bands as the concentration of transmissions subband.
Preferably, transmission sub-band division module 502 can be used for only distributing the dominant frequency subband or only distribute secondary subband frequently to give same data block.
Preferably, major-minor frequency band division module 501 can be used for when dominant frequency subband number increases, and under the prerequisite that does not influence interference coordination, keeps dominant frequency subband number dominant frequency subband hour as new dominant frequency subband.Major-minor frequency band division module 501 can also be used to select a subband or more than one and the equally distributed subband dominant frequency subband as this sub-district.
Transmission sub-band division module 502 can also be used for when disperseing transmission subband number to increase, and keeps to disperse transmission subband number dispersion transmission subband hour to transmit subband as new dispersion.Transmission sub-band division module 502, can also be used to distribute a subband or more than one and equally distributed subband as disperseing the transmission subband.
Can recognize, the present invention can be applied in the base station of wireless communication system, to realize time-frequency resource allocating communication system.Such as, above-mentioned any one time-frequency resource allocating device can be applied in the base station.To those skilled in the art, being coupled time-frequency resource allocating device and base station to realize communicating to connect is significantly, so this is not given unnecessary details.
Equally, the present invention can also be applied in the various wireless communication systems.Usually, applied wireless communication system comprise the base station and with the travelling carriage of base station communication, wherein the base station comprises any one above-mentioned time-frequency resource allocating device, and the base station is used for and will distributes to the running time-frequency resource information notice travelling carriage of dominant frequency subband, secondary subband frequently, concentration of transmissions and dispersion transmission, thereby travelling carriage can be used to the time-frequency position of the information that receives according to the adjustment of described running time-frequency resource information.
In more than describing, the present invention is particularly useful for multi-carrier wireless communications system.Wherein but these multi-carrier wireless communications systems comprise and being not limited to: orthogonal frequency division multiplexing radio communication system, or be the MC-CDMA wireless communication system, or directly expand code division multi-address radio communication system for multicarrier, or be the multi-tone code division multi-address radio communication system, or be the multicarrier time-division multiple access wireless communication system, or be time-frequency domain two-dimensional expansion multi-carrier wireless communications system.
In sum, behind application the present invention, when distributing running time-frequency resource, consider the major-minor frequency division methods of frequency soft multiplexing simultaneously, make both organically combine, thereby improved systematic function for the user.Particularly, the present invention can make and disperse the transmission subband to concentrate on the dominant frequency subband as far as possible or concentrate on secondary subband frequently as far as possible, thereby makes that dispersion transmission user is the acquisition frequency resource as much as possible, improves diversity performance significantly when adopting soft-frequency reuse.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1, the distribution method of time frequency resources in a kind of wireless communication system is characterized in that, this method comprises:
A, bandwidth of operation is divided into subband greater than one, at least one subband of each cell selecting is as the dominant frequency subband of this sub-district, and remainder is as the secondary subband frequently of this sub-district;
B, the dispersion transmission or the concentration of transmissions of giving this sub-district with the dominant frequency allocation of subbands of each sub-district, the dispersion transmission or the concentration of transmissions of giving this sub-district with the secondary allocation of subbands frequently of each sub-district.
2, the distribution method of time frequency resources in the wireless communication system according to claim 1 is characterized in that, described step B comprises: for disperseing the transmission subband, and is the concentration of transmissions subband with all secondary allocation of subbands frequently with all dominant frequency allocation of subbands.
3, the distribution method of time frequency resources in the wireless communication system according to claim 1 is characterized in that, described step B comprises: with all dominant frequency allocation of subbands is the concentration of transmissions subband, and all secondary allocation of subbands frequently are dispersion transmission subband.
4, the distribution method of time frequency resources in the wireless communication system according to claim 1 is characterized in that, described step B comprises: whole working bandwidth is assigned as disperses the transmission subband, perhaps whole working bandwidth is assigned as the concentration of transmissions subband.
5, the distribution method of time frequency resources in the wireless communication system according to claim 4 is characterized in that, described step B comprises: only distribute the dominant frequency subband or only distribute secondary subband frequently to give same data block.
6, the distribution method of time frequency resources in the wireless communication system according to claim 1, it is characterized in that, described steps A comprises: when dominant frequency subband number increases, under the prerequisite that does not influence interference coordination, keep dominant frequency subband number dominant frequency subband hour as new dominant frequency subband.
7, the distribution method of time frequency resources in the wireless communication system according to claim 1 is characterized in that, described steps A comprises: select a subband or more than one and the equally distributed subband dominant frequency subband as this sub-district.
8, the time-frequency resource allocating device in a kind of wireless communication system is characterized in that, this device comprises:
Major-minor frequency band division module is used for bandwidth of operation is divided into subband greater than one, and at least one subband of each cell selecting is as the dominant frequency subband of this sub-district, and remainder is as the secondary subband frequently of this sub-district;
Transmission sub-band division module is used for the dominant frequency allocation of subbands of each sub-district is given the dispersion transmission or the concentration of transmissions of this sub-district, the dispersion transmission or the concentration of transmissions of giving this sub-district with the secondary allocation of subbands frequently of each sub-district;
Described major-minor frequency band division module is connected with transmission sub-band division module.
9, the time-frequency resource allocating device in the wireless communication system according to claim 8 is characterized in that,
Described transmission sub-band division module is used for all dominant frequency allocation of subbands for disperseing the transmission subband, and is the concentration of transmissions subband with all secondary allocation of subbands frequently.
10, the time-frequency resource allocating device in the wireless communication system according to claim 8 is characterized in that,
Described transmission sub-band division module, being used for all dominant frequency allocation of subbands is the concentration of transmissions subband, and all secondary allocation of subbands frequently are dispersion transmission subband.
11, the time-frequency resource allocating device in the wireless communication system according to claim 8 is characterized in that,
Described transmission sub-band division module is used for whole working bandwidth is assigned as dispersion transmission subband, perhaps is used for whole working bandwidth is assigned as the concentration of transmissions subband.
12, according to Claim 8 the time-frequency resource allocating device-11 in each described wireless communication system is characterized in that, described wireless communication system is a multi-carrier wireless communications system.
13, a kind of base station is characterized in that, this base station comprises as the time-frequency resource allocating device in the wireless communication system as described in each among the claim 8-11.
14, a kind of wireless communication system is characterized in that, this system comprise the base station and with the travelling carriage of base station communication,
Wherein said base station comprises as the time-frequency resource allocating device in the wireless communication system as described in each among the claim 8-11, and described base station is used for distributing to the running time-frequency resource information notice travelling carriage of dominant frequency subband, secondary subband frequently, concentration of transmissions and dispersion transmission;
Travelling carriage is used for the time-frequency position that according to described running time-frequency resource information adjustment is used to the information that receives.
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| CN 200610072329 CN101056292A (en) | 2006-04-14 | 2006-04-14 | Time frequency resource allocation method, device and base station and radio communication device applying same |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102217401A (en) * | 2008-11-21 | 2011-10-12 | 富士通株式会社 | Base station, communication method, subcarrier allocation method, and subcarrier allocation program |
| CN101730239B (en) * | 2008-10-24 | 2012-05-09 | 中兴通讯股份有限公司 | Method for distributing cell frequency resources and terminal channel quality indicated value feedback device |
| WO2016179838A1 (en) * | 2015-05-14 | 2016-11-17 | Nec Corporation | Method and apparatus for signal transmission |
| WO2019148499A1 (en) * | 2018-02-05 | 2019-08-08 | Nec Corporation | Methods and devices of resource mapping for data transmission and of data receiving |
| CN110402542A (en) * | 2017-04-19 | 2019-11-01 | 日本电信电话株式会社 | Signal processing circuit, distributed memory, ROM and DAC using the circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101730239B (en) * | 2008-10-24 | 2012-05-09 | 中兴通讯股份有限公司 | Method for distributing cell frequency resources and terminal channel quality indicated value feedback device |
| CN102217401A (en) * | 2008-11-21 | 2011-10-12 | 富士通株式会社 | Base station, communication method, subcarrier allocation method, and subcarrier allocation program |
| WO2016179838A1 (en) * | 2015-05-14 | 2016-11-17 | Nec Corporation | Method and apparatus for signal transmission |
| CN110402542A (en) * | 2017-04-19 | 2019-11-01 | 日本电信电话株式会社 | Signal processing circuit, distributed memory, ROM and DAC using the circuit |
| CN110402542B (en) * | 2017-04-19 | 2023-03-28 | 日本电信电话株式会社 | Signal processing circuit, distributed memory using the same, ROM, and DAC |
| WO2019148499A1 (en) * | 2018-02-05 | 2019-08-08 | Nec Corporation | Methods and devices of resource mapping for data transmission and of data receiving |
| US11632761B2 (en) | 2018-02-05 | 2023-04-18 | Nec Corporation | Methods and devices of resource mapping for data transmission and of data receiving |
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