CN101473619A - Wireless resource allocation methods and apparatus - Google Patents

Wireless resource allocation methods and apparatus Download PDF

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Publication number
CN101473619A
CN101473619A CNA2007800228459A CN200780022845A CN101473619A CN 101473619 A CN101473619 A CN 101473619A CN A2007800228459 A CNA2007800228459 A CN A2007800228459A CN 200780022845 A CN200780022845 A CN 200780022845A CN 101473619 A CN101473619 A CN 101473619A
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China
Prior art keywords
bandwidth
resource
discontinuous portions
information
wireless terminal
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CNA2007800228459A
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Chinese (zh)
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A·戈罗霍夫
A·汉德卡尔
R·保兰基
R·普拉卡什
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Qualcomm Inc
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Qualcomm Inc
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Abstract

Wireless communications methods and apparatus are described. A communicat ions apparatus, e.g., a base station, measures interference information, e.g ., other sector interference information. The communications apparatus gener ates a preamble which includes a plurality of pilot symbols and at least one of the pilot symbols includes interference information. In some embodiments , the preamble is part of a superframe structure, e.g., a recurring superfra me strucuture, including the preamble and a plurality of frames, at least so me of the frames used to convey traffic data. The communications apparatus t ransmits the preamble, thus broadcasting the interference information to acc ess terminals in the vicinity. An access terminal receives the preamble incl uding a plurality of pilot signals, at least one of the pilot signals includ ing interference information. The access terminal recovers the interference information from the received preamble and controls signal transmission base d on the recovered interference information.

Description

Wireless resource allocation methods and device
Related application
The present invention requires the rights and interests of following application: on June 23rd, 2006 is that submit, be entitled as the U.S. Provisional Patent Application S.N.60/816 of " being used for the superelevation data rate (UHDR) that mobile broadband wireless inserts ", 281, the U.S. Provisional Patent Application S.N.60/815 that on June 21st, 2006 is that submit, be entitled as " allocated bandwidth that is used for wireless communication system ", 664, and on June 21st, 2006 is that submit, the U.S. Provisional Patent Application S.N.60/815 that is entitled as " superframe structure that is used for wireless communication system ", 733, each application clearly is herein incorporated by reference.
Technical field
Each embodiment is at the distribution and/or the use of wireless communications method and device, particularly resource.
Background technology
Wireless communication system has become a kind of prevalent means that most of people communicate by letter by means of its realization in the world wide.It is littler and more powerful that Wireless Telecom Equipment has become, so that satisfy consumer demand and improve portability and convenience.Raising on the mobile device disposal ability such as cell phone has brought the increase to the wireless network transmission system demand.These systems generally can't upgrade with the same being easy to of cellular device by its communication.Because the expansion of mobile device performance, be difficult to so that give full play to and newly keep old Radio Network System with mode improved wireless device performance.
Wireless communication system uses different approach to generate the transfer resource of channel form usually.These systems can be code division multiplexing (CDM) system, frequency division multiplexing (FDM) system and Time Division Multiplexing system.A kind of FDM commonly used distortion is OFDM (OFDM), and it is divided into a plurality of orthogonal sub-carriers with whole system bandwidths effectively.These subcarriers also can be called as tone (tone), frequency (bin) and frequency channels.Can utilize data to modulate each subcarrier.Utilization with the time be divided into the basis technology, each subcarrier can be used for continuous timeslice of all or part or time slot.Each user can be provided with the combination of one or more time slot and subcarrier, is used for sending and receiving information at the burst cycle (burst period) or the frame of regulation.Hopping scheme is symbol rate hopping scheme or piece hopping scheme normally.
The technology that is divided into the basis with sign indicating number is generally at some usable frequency transmitting datas of any time of certain limit.Generally speaking, data be digitized and spread spectrum on available bandwidth, wherein can cover a plurality of users on the channel and each user can be assigned with unique sequence code.The user can carry out transmission in identical wide-band chunk of spectrum, wherein each user's signal relies on its unique separately spreading code spread spectrum to whole bandwidth.It is shared that this technology can provide, and one or more user can send and receive simultaneously.This sharing can realize that wherein user's bit stream is encoded in pseudorandom mode and expands on the channel of non-constant width by spread spectrum digital modulation.Receiving terminal is designed to randomization is discerned and reduced to relevant unique sequence code, so that catch specific user's bit in the mode of unanimity.
Typical cordless communication network (for example, adopting frequency division, time-division and/or sign indicating number branch technology) comprises one or more base stations that the overlay area is provided and one or more (for example, wireless) terminals that move that can transmit and receive data in this overlay area.Typical base station can send simultaneously be used to broadcast, a plurality of data flow of multicast and/or unicast service, wherein data flow is that portable terminal is had the independent stream that receives the data of interest.Portable terminal in this base station coverage area can to receive from one of base station, more than one or whole data flow interesting.Similarly, portable terminal also can be to base station or another portable terminal emission data.In these systems, distribute bandwidth and other system resource with scheduler.
Along with wireless system development in time, service provider has the right to use except those them not buy one or more frequency bands other frequency bands of right of correspondence.This has caused this situation, that is, service provider may have the right of using a plurality of discontinuous portions of bandwidth in a geographic area, has obtained bandwidth between the discontinuous portions of bandwidth of right but be under an embargo to use at this service provider.
Discontinuous portions of bandwidth can be used alone, and for example, uses a discontinuous portions of bandwidth by wireless terminal that communicates or base station a moment.Yet, from the angle of frequency diversity and/or throughput, wish that wireless terminal or base station can use a plurality of discontinuous portions of bandwidth at one time, for example support the communication on one or more directions.For example, support at needs under the situation of high up link or data rate for downlink, wish to use a plurality of discontinuous portions of bandwidth, for example by the portions of bandwidth of the carrier separation of other service provider, so that, come the communication of support uplink direction or down link direction according to having the direction of high data throughput requirement.
In view of more than, obviously need a kind of method and apparatus, allow base station and/or wireless terminal to use discontinuous portions of bandwidth, and do not use the portions of bandwidth between this discontinuous frequency band.If at least some method and apparatus are applicable to the situation that discontinuous frequency band is separated with the corresponding bandwidth of the bandwidth of service provider carrier wave well, will be very good, the bandwidth of service provider carrier wave for example is 1.25MHz or more in some cases.
Summary of the invention
The invention describes and be used to distribute and the method and apparatus of the resource that use is corresponding with discontinuous portions of bandwidth.Can utilize single assigned to come the portions of bandwidth of a plurality of separation that for example will be used by wireless terminal is simultaneously distributed, as uplink band or downlink band.The different bandwidth part that is assigned to terminal can have different protection number of sub carrier wave and/or protection sub-carrier positions, protects subcarrier to have and be transferred to relevant protection subcarrier information wireless terminal or that determine in broadcast singal from institute's canned data.The portions of bandwidth that is assigned to the separation of terminal use can be separated such as 1.25MHz or more carrier frequency band, and this carrier frequency band can not be used because of belonging to another service provider.Use some embodiment of ofdm signal to be implemented, wherein wireless terminal can generate or receive and comprise for example OFDM symbol of tone of subcarrier, subcarrier for example tone corresponding to different discontinuous parts but not separate the bandwidth of discontinuous part.
Be used for comprising: first wireless terminal of selecting to wait to be assigned with the communication resource in an illustrative methods of wireless communication system Resources allocation; And the resource allocation that will comprise at least two discontinuous portions of bandwidth gives described first wireless terminal with a period of time, and the portions of bandwidth that described at least two discontinuous portions of bandwidth are not included in the described resource is separated.Be used for comprising: select module, be used to select to wait to be assigned with first wireless terminal of the communication resource in an exemplary communication devices of wireless communication system Resources allocation; And resource distribution module, the resource allocation that is used for comprising at least two discontinuous portions of bandwidth gives described first wireless terminal of being selected by described selection module with a period of time, and the portions of bandwidth that described at least two discontinuous portions of bandwidth are not included in the described resource is separated.
The illustrative methods of operate wireless terminal comprises: receive resource allocation message, this message represents to described wireless terminal Resources allocation with a period of time, and this resource comprises at least two discontinuous portions of bandwidth that the portions of bandwidth that is not included in the described resource is separated; And use the described resource that is assigned with to communicate by letter with access point.Exemplary wireless terminal comprises: the receiving terminal module, be used to receive resource allocation message, this message represents to described wireless terminal Resources allocation with a period of time, and this resource comprises at least two discontinuous portions of bandwidth that the portions of bandwidth that is not included in the described resource is separated; And following module one of at least: i) symbol generation module, be used to generate with the resource corresponding symbol of being distributed and ii) symbol recover module, be used for recovering with the resource corresponding symbol of being distributed.
Though various embodiment have been discussed in above-mentioned summary, be to be appreciated that not to be that all embodiment must comprise identical feature, some above-mentioned features are inessential in certain embodiments, but desirable.Numerous supplementary features, embodiment and benefit will be discussed in the following detailed description.
Description of drawings
Fig. 1 illustrates multi-address radio communication system figure.
Fig. 2 A and 2B illustrate the superframe structure figure that is used for multi-address radio communication system.
Fig. 3 illustrates bandwidth deployment figure.
Fig. 4 illustrates the frame assumption diagram that is used for multi-address radio communication system.
Fig. 5 A illustrates the forward link frame figure that is used for multi-address radio communication system.
Fig. 5 B illustrates the reverse link frame figure that is used for multi-address radio communication system.
Fig. 6 illustrates first communication equipment in the multi-address radio communication system and the figure of second communication equipment.
Fig. 7 is the flow chart of the illustrative methods of Resources allocation in the wireless communication system.
Fig. 8 is the flow chart according to operation such as the illustrative methods of the wireless terminal that accesses terminal of each embodiment.
Fig. 9 is the figure such as the exemplary communication device of base station, access point or central controller node of Resources allocation in wireless communication system.
Figure 10 is the figure such as the example wireless terminal that accesses terminal according to each embodiment.
Embodiment
Describe each embodiment referring now to accompanying drawing, wherein identical Reference numeral is used in reference to all the time for components identical.In the following description, numerous specific detail are proposed for the purpose of explaining, so that the complete understanding to one or more embodiment is provided.But obviously this (these) embodiment can be tried out and be need not these specific detail.In other cases, one or more for convenience of description embodiment illustrate known configurations and equipment with the block diagram form.
Referring to Fig. 1, be illustrated according to the multi-address radio communication system 100 of an embodiment.Multi-address radio communication system 100 comprises a plurality of sub-districts, and for example the sub-district 102,104 and 106.In the embodiment show in figure 1, each sub-district (102,104 and 106) that comprises a plurality of sectors can comprise access point (162,164,166) respectively.For example, sub-district 102 comprises the first sector 102a, the second sector 102b and the 3rd sector 102c.A plurality of sectors are formed by antenna groups, each antenna group be responsible for a sub-district part in access terminal and communicate.In sub-district 102, antenna groups 112,114 and 116 each corresponding different sector.In sub-district 104, antenna groups 118,120 with 122 each corresponding to different sectors.In sub-district 106, antenna groups 124,126 with 128 each corresponding to different sectors.
Each sub-district comprises some the accessing terminal that one or more sector with each access point communicates.For example, access terminal and 130,132,134,136 communicate by letter with access point 162 with 138; Access terminal and 140,142,144,146,148 communicate by letter with access point 164 with 134; And access terminal and 136,148,150,152,154 communicate by letter with access point 166 with 156.
Controller 180 and sub-district 102,104 are connected with each sub-district in 106.Controller 180 can comprise with one or more of multiple network and being connected, and multiple network is internet, packet-based other networks or to providing information with accessing terminal of the cell communication of multi-address radio communication system 100 or from the circuit-switched voice network of this reception information that accesses terminal for example.Controller 180 comprises or is connected with scheduler, dispatch and access terminal between transmission.In other embodiments, scheduler can be positioned among each sector or its combination of each single subdistrict, sub-district.
One or more carrier wave in the enough a plurality of carrier waves of the equal energy in each sector is operated.Each carrier wave is that system can run on wherein or the part of the bigger bandwidth that can be used for communicating by letter.The single sector of using one or more carrier wave for example in frame or the superframe, can make a plurality of accessing terminal be scheduled on variant carrier wave in any given time interval.Further, one or more accessing terminal can be scheduled on a plurality of carrier waves simultaneously.
Access terminal and to be scheduled on a carrier wave or more than one carrier wave according to its performance.These performances can be parts that goes for that when communication generates or the session information consulted in the past when accessing terminal, and can be the parts of the authentication information that sends by accessing terminal, or according to any other approach foundation.In some aspects, session information can comprise by inquiring about the session authentication token that this accesses terminal or generates through its its performance of transmission decision.
As used herein, access point can be to be used for fixed station with terminal communication, also can be called as base station, Node B (Node B) or some other terms, and comprises their some or repertoire.Accessing terminal also to be called as subscriber equipment (UE), Wireless Telecom Equipment, terminal, wireless terminal, travelling carriage, mobile node, moving body or some other terms, and comprises their some or repertoire.
Though what should be noted that Fig. 1 describes is physical sector, promptly different sectors is had the different antennae group, also can adopt other modes.For example, adopt a plurality of fixing " wave beams ", each " wave beam " zones of different of coverage cell in frequency domain, this can perhaps combine with physical sector in order to the alternate physical sector.
Referring to Fig. 2 A and Fig. 2 B, the superframe structure figure that is used for multi-address radio communication system is illustrated.Fig. 2 A illustrates the superframe structure figure that is used for Frequency Division Duplexing (FDD) (FDD) multi-address radio communication system, and Fig. 2 B illustrates the superframe structure figure that is used for time division duplex (TDD) multi-address radio communication system.Super-frame preamble is partly transmitted in the beginning of each superframe, and it is inner perhaps can be positioned at superframe itself, for example lead code and in lead sign indicating number.
In Fig. 2 A and 2B, forward link transmissions all is divided into the unit of superframe.Superframe can comprise the super-frame preamble succeeded by a succession of frame.In the FDD system, reverse link can take different frequency bandwidths with fl transmission, so that being transmitted on the link can or largely can be not overlapping on any frequency sub-carrier.In the TDD system, N forward link frame and M reverse link frame have been stipulated at the order forward link frame that allows can be transmitted continuously before the transmission opposite types frame and the number of reverse link frame.Should be noted that in given superframe or between the superframe, the number could vary of N and M.
Figure 200 among Fig. 2 A illustrates the exemplary forward link superframe 201 that comprises super-frame preamble 202, and this super-frame preamble 202 is succeeded by frame (204,206,208,210,212,214,216,218,220,222,224,226,228,230,232,234,236,238,240,242,244,246,248 and 250).The beginning of another forward link superframe partly be shown as including succeeded by frame 204 ' super-frame preamble 202 '.In the illustrated blocks frequency-hopping mode, for example the example frame of frame 218 comprises data division 252, control section 254, pilot portion 256 and public guide frequency part 258.In exemplary symbols rate frequency-hopping mode, for example the example frame of frame 218 comprises data division 260, control section 262, pilot portion 264 and public guide frequency part 266.
Figure 27 0 among Fig. 2 B illustrates the exemplary forward link superframe 271 that comprises super-frame preamble 272, and the silence period that this super-frame preamble 272 keeps succeeded by the frame sequence that is used for the forward link signaling with for reverse link frame is (frame 274, silence period 276 at interval, frame 278, silence period 280, frame 282, silence period 284, frame 286, silence period 288, frame 290, silence period 292, frame 294, silence period 296, ..., frame 298, silence period 299).The beginning of another forward link superframe partly be shown as including succeeded by frame 274 ' super-frame preamble 272 '.In the illustrated blocks frequency-hopping mode, for example the example frame of frame 286 comprises data division 275, control section 277, pilot portion 279 and public guide frequency part 281.In exemplary symbols rate frequency-hopping mode, for example the example frame of frame 286 comprises data division 283, control section 285, pilot portion 287 and public guide frequency part 289.
In FDD and TDD system, each superframe all can comprise super-frame preamble.In certain embodiments, super-frame preamble comprises pilot channel and broadcast channel, this pilot channel comprises can be access in the pilot tone that terminal is used for channel estimating, and this broadcast channel comprises accessing terminal and can be used to the information that comprises in the forward link frame is carried out the configuration information of demodulation.Such as regularly and be enough to make the information of catching in addition that accesses terminal other information that communicate, and prime power control or offset information, also can be included in the super-frame preamble.In other cases, can only some information in above-mentioned and/or other information be included in this super-frame preamble.
On the one hand, following information can be included in the super-frame preamble: (i) Common Pilot Channel; (ii) broadcast channel comprises system and configuration information; (iii) the acquisition pilot channel is used for obtaining regularly and other information; And (iv) other sector interference channel, comprise the indication of sector with respect to the measured interference of other sectors.
In addition, in some aspects, the message that is used for channel in the super-frame preamble can be crossed over the multiple super-frame preamble of different superframes.This can be used to by distributing bigger resource to improve decoding capability for some high-priority message.
Shown in Fig. 2 A and 2B, there is a succession of frame the super-frame preamble back.Each frame can comprise the OFDM symbol of identical or different quantity, and these OFDM symbols constitute can be used to a plurality of subcarriers of transmitting simultaneously in certain specified time period.Further, each frame can wherein be given the user with one or more non-contiguous OFDM allocation of symbols according to the operation of symbol rate frequency-hopping mode on forward link or reverse link, and perhaps according to the operation of piece frequency-hopping mode, wherein the user carries out frequency hopping in the OFDM symbolic blocks.Actual piece or OFDM symbol can be between frame frequency hopping or non-frequency hopping.
Fig. 3 illustrates bandwidth deployment figure.In one or more schemes, the bandwidth of being crossed over by super-frame preamble can be 1.25MHz.In other schemes, can be 2.5MHz, 5MHz, 20MHz or certain other bandwidth.
In Fig. 3, bandwidth 300 is divided into a plurality of carrier waves 302,304 and 306.In some scheme, catch, distribute, access, request, power control, pilot tone and reporting channel come across in each carrier wave.In addition, each carrier wave can have super-frame preamble and forward link control channel and The function of backward power control channel.Yet, actual coding, transfer rate, type of message and timing, resource allocation, overhead notification, frequency-hopping mode and/or sequence, and other transmission and location parameter, variable between carrier wave and carrier wave.Form, transfer rate and frequency hopping information can be signaled or be notified in other mode and access terminal.Can perhaps can provide this information via obtaining this information with the irrelevant independent control channel of specific carriers by other modes.
Have better performance come some terminals of restituted signal can be scheduled in superframe, continuously in the superframe or on two or more carrier waves during its communication session.These multicarriers access terminal and can be used for the different carrier of reverse link frame and forward link frame during communication session or superframes, can in different superframes or during the communication session, be scheduled on different carrier, perhaps can in time be scheduled on different carrier synchronous image duration basically.Can dispatch this multicarrier and access terminal, and the statistical multiplexing gain that runs through whole bandwidth is provided for given carrier wave provides load balancing.
For support that multicarrier accesses terminal in superframe, continuous superframe or during its communication session, stride some carrier waves and operate, some approach can be provided.At first, multicarrier accesses terminal and can carry out demodulation at each carrier wave to super-frame preamble and forward link control channel respectively.In the case, distribution, scheduling, power control etc. are carried out in carrier wave ground one by one.
On the one hand, each carrier wave of separation partly is less than or equal to 1.25MHz.These parts can be dispersed in≤whole bandwidth of 20MHz on.In addition, in some versions, the multiple that is spaced apart 1.25MHz between the each several part of same carrier wave.Yet, can adopt other interval and part size according to bandwidth deployment etc.
In some versions, whole FFT sizes of one or more acquisition pilot carrying sector or access point, for example 1.25MHz, 2.5MHz, 5MHz, 10MHz or 20MHz.In some versions, this information can be provided by the scrambler of acquisition pilot.In other schemes, this information can be carried on other parts of super-frame preamble.
The non-contiguous standard of distributing of one or more carrier waves can be provided on one or more overhead channels of super-frame preamble on the one hand.For example, the information of discriminatory carrier can be included in the interior identification protecting carrier number of one or more part of carrier wave and/or the assignment bit map of position in overhead channel or the pilot tone.
In order to dispatch, can in to a user or a plurality of users' single assigned, handle the resource in the non-neighbouring part, perhaps can in independent carrier wave part, distribute this resource independently.For example, if adopt channel trees to dispatch, resource can be mapped on the channel tree nodes continuously, and no matter whether these resources are the resources in the neighbouring part.That is to say that each resource all has based on carrier wave but not the resource identification of the position in the bandwidth.
Referring to Fig. 4, the channel architecture figure of multi-address radio communication system is illustrated.Bandwidth 400 is for comprising the virtual bandwidth of a plurality of discontinuous parts, and this bandwidth can be used for communicating according to the parameter of system design.This structure comprises one or more forward link frame 404 and reverse link frame 408, and as discussing at Fig. 2 A and/or Fig. 2 B, each frame can be the part of one or more superframe.
Each forward link frame 404 includes control channel 406.Each channel in the control channel 406 can comprise function information, relate to such as catching, reply, forward link assignment that can be identical or different for broadcasting, multicast and unicast messages type to respectively accessing terminal, to the reverse link assignment that respectively accesses terminal, to the power of reverse link control that respectively accesses terminal, and reverse link is replied.Should be noted that and in control channel 406, can support this function more or still less.And control channel 406 can come frequency hopping in each frame according to frequency hop sequence, and this frequency hop sequence is identical with the frequency hop sequence of distributing to data channel or different.
Each reverse link frame 408 includes and comes from a plurality of rl transmission that access terminal, and for example 412,414 and 416.In Fig. 4, rl transmission is described to piece, i.e. the adjacent OFDM symbol group.Should be noted that the symbol rate frequency hopping that also can adopt for example non-adjacent symbols piece and so on.
In addition, each reverse link frame 408 all can comprise the The function of backward power control channel 440 that one or more can comprise feedback channel; The pilot channel that is used for reverse link channel estimation, and can be included in responder link in the rl transmission 412,414,416.Each channel in the The function of backward power control channel 440 can comprise function information, relates to the forward link resources request and the reverse link resources request of for example sending by respectively accessing terminal; Channel information for example is used for dissimilar channel transmitted quality informations (CQI); And come from the pilot tone that accesses terminal, can be access in a little and use for the channel estimating purpose.Should be noted that and to support this function more or still less in the control channel 440.And The function of backward power control channel 440 can be according to frequency hop sequence frequency hopping in each frame, and this frequency hop sequence is identical with the frequency hop sequence of distributing to data channel or different.
In some scheme, for multiplexed user on The function of backward power control channel 440, one or more orthogonal code, scrambler sequence etc. can be used for the different kinds of information of transmission in each user and/or the The function of backward power control channel 440 is separated.These orthogonal codes can be that the user is distinctive, perhaps also can be access point each communication session or such as each superframe than short-term between distribute to respectively and access terminal.
In addition, in some scheme, some available subcarriers in the OFDM symbol can be designated as protection subcarrier and can be not modulated, i.e. transmission of power not on these subcarriers.Can provide protection number of sub carrier wave in super-frame preamble and each frame via one or more message in the control channel 406 or super-frame preamble.
Further, in some versions,,, so also can access terminal bag is carried out combined coding at this even the symbol of bag transmits by subcarrier in order to reduce overhead transmission (overheadtransmission) to particular terminal.Mode like this, single CRC can be used for this bag, and comprises that the transmission of the symbol that comes from these bags can not experience the overhead transmission of CRC.
Should be noted that bandwidth 400 can comprise discontinuous subcarrier and need not adjacent.In this scheme, control channel can be restricted to less than all carrier wave parts, is placed at random among these parts, perhaps is scheduled in these parts in certain mode of determining.
Referring to Fig. 5 A, the scheme that is used for the forward link frame of multi-address radio communication system is illustrated.As described in Fig. 5 A, each forward link frame 404 further is divided into two parts.First is for comprising or can not comprise the control channel 406 of adjacent carrier wave set, and it has according to desirable control data amount and other considers the subcarrier of the varying number that item is distributed.Reserve part 422 is generally used for transfer of data.Control channel 406 can comprise one or more pilot channels 512 and 514.In the symbol rate frequency-hopping mode, pilot channel can come across on each OFDM symbol in each forward link frame, and need not to be contained in the control channel 406 under those situations.As described in Fig. 5 A, in both cases, signaling channel 516 and power control channel 518 can appear in the control channel 406.Signaling channel 516 can comprise distribution, reply and/or reverse link on power reference that is used for data, control and pilot transmission and adjustment.
Power control channel 518 can carry the information about the interference that produces in other sector because of the transmission that accesses terminal that comes from this sector.And in some scheme, the subcarrier 420 at entire belt broad edge place can play the effect of certainly protecting subcarrier.
Should be noted that the emission part that is used for the sector at a plurality of transmitting antennas, different transmitting antennas should have identical superframe sequential (comprising superframe index), ofdm signal characteristic and frequency hop sequence.
Should be noted that in some versions control channel 512,514,516,518 can comprise the distribution identical with transfer of data, for example, if transfer of data is the piece frequency hopping, pieces then identical or different sizes can be assigned to control channel.
Referring to Fig. 5 B, the scheme of the reverse link frame that is used for the multiple access wireless communication system is shown.Pilot channel 522 can comprise pilot tone, to allow access point reverse link is estimated.Request channel 524 can comprise the information that allows to access terminal into follow-up reverse link and forward link, frame request resource.
Reverse link feedback channel 526 allows to access terminal feedback about channel information CQI is provided.For to the emission that accesses terminal, CQI can relate to one or more scheduling method, perhaps available scheduling method.Exemplary pattern can comprise wave beam forming, SDMA, precoding or its combination.Power control channel 528 can be access in terminal with for referencial use, generates the power control instruction that is used for such as the rl transmission of transfer of data to allow access point.In some versions, power control channel 528 can comprise one or more feedback channel 526.Data channel 432 can be operated in different reverse link frame 408 according to symbol rate frequency hopping or piece frequency-hopping mode.And in some scheme, the subcarrier 480 at entire belt broad edge place can play the effect of certainly protecting subcarrier.
Though should be noted that Fig. 5 A and 5B have described the different channels that constitutes control channel 406 and 440 and be re-used in time, situation might not be like this.The combination in any of available different quadrature, accurate quadrature or scrambler, different frequency or time, sign indicating number and frequency is carried out multiplexing to the different channels that constitutes control channel 406 and 440.
Referring to Fig. 6, show the block diagram of the embodiment of first exemplary in the mimo system 800 communication equipment or system 810 and exemplary second communication equipment or system 850.At first communication equipment, 810 places, provide the business datum (traffic data) of a plurality of data flow to transmission (TX) data processor 814 from data source 812.In an embodiment, the transmitting antenna of each data flow by separately transmits.TX data processor 814 is based upon specific coding scheme that this data flow selects the business datum of each data flow is formatd, encodes and interweaves, so that the data behind the coding to be provided.
Data and pilot data after can using the OFDM technology with the coding of each data flow carry out multiplexing.Pilot data is generally the known data patterns of handling in a known way, and can be at receiving terminal system in order to estimate channel response.Then, be based upon certain modulation schemes (for example, BPSK, APSK, M-PSK, or M-QAM) that data flow selects again pilot tone after this each data flow multiplexing and the data behind the coding are modulated, so that modulation symbol to be provided.The data transfer rate of each data flow, coding and modulation can be determined by the instruction of being carried out by processor 830.
The modulation symbol of each data flow is provided for TX processor 820 subsequently, and this TX processor 820 can further be handled modulation symbol (for example, at OFDM).TX processor 820 is then with N TStream of modulation symbols offers N TTransmitter (TMTR822a to 822t).Each transmitter 822 receives and handles symbols streams separately, and so that one or more analog signal to be provided, this analog signal of the step of going forward side by side joint (for example, amplifying filtering, and up-conversion) is to provide the signal that is suitable for after the modulation of transmitting on the mimo channel.N from 822a to 822t TSignal after the modulation is launched from NT antenna 824a to 824t respectively subsequently.
At second communication equipment 850 places, the signal after the modulation of being launched is by N RAntenna 852a to 852r receives, and is provided for separately receiver (RCVR) 854 from the signal that each antenna 852 receives.Each receiver 854 (854a to 854r) is regulated the signal that (for example, filtering is amplified, and down-conversion) receives separately, signal digitalized so that sample to be provided with after regulating, and handle this sample so that corresponding " receiving " symbols streams to be provided.
Then, RX data processor 860 receives and handles from N based on specific receiver treatment technology RThe symbols streams that receiver receives is to provide N T" detected " symbols streams.The processing of RX data processor 860 below will be described in further detail.Each detected symbols streams comprises the symbol of estimating at the modulation symbol of corresponding data stream emission.RX data processor 860 carries out demodulation, deinterleaving and decoding to each detected symbols streams again, with the business datum of restore data stream.Recovered data is stored to data sink 864.The processing of RX data processor 860 is that a kind of of the TX processor 820 at first communication equipment, 810 places and the 814 performed processing of TX data processor replenished.
RX data processor 860 is subject to the number of the subcarrier of demodulation simultaneously, for example 512 subcarriers or 5MHz, 128 subcarriers or 1.25MHz, 256 subcarriers or 2.5MHz.
Estimate can be used to carry out space, space/time processing by the channel response that RX processor 860 generates, adjust power level, change modulation rate or modulation scheme at the receiver place, or other operation.In addition, RX processor 860 can estimate perhaps also have other characteristics of channel to the Signal to Interference plus Noise Ratio (SNR) of detected symbols streams, and this tittle is offered processor 870.RX data processor 860 or processor 870 can further obtain the estimation of " operation " SNR of system.Then, processor 870 provides channel condition information (CSI), and this channel condition information (CSI) can comprise the various types of information about communication link and/or the data flow that receives.For example, CSI can comprise operation SNR.CSI is by the TX data processor processes subsequently, and modulated device 880 modulation are launched machine 854a to 854r and regulate, and passed back first communication equipment 810.The excessive data that comes from data source 816 for example comprises reverse link traffic, can and be received by TX data processor 818 sometimes, and modulated device 880 modulation are launched machine 854a to 854r and regulate, and are transferred to first communication equipment 810.
At first communication equipment, 810 places, the modulation signal that comes from second communication equipment 850 is received by antenna 824, and be received machine 822 and regulate, by demodulator 840 demodulation, and by 842 processing of RX data processor, so that the CSI by the receiver system report is recovered.The CSI that is reported is provided for processor 830 subsequently, and be used for (1) be identified for data transfer rate and the coding and the modulation scheme of data flow, (2) are that TX data processor 814 and TX processor 820 generate various controls.Alternately, CSI can be used for determining the encoding rate of modulation scheme and/or transmission with other information by processor 870.Be provided for the transmitter of first transmission equipment of this information of use subsequently, this information can be quantized, follow-up transmission is offered the receiver of second communication equipment.By RX data processor 842 data recovered can, and sometimes, be stored in data sink 844.Recovered data can, and sometimes, be comprised in the reverse link traffic data.
Processor 830 and 870 is commanded the operation at first communication equipment and second communication equipment place respectively.Memory 832 and 872 is respectively processor 830 and 870 procedure code and the data of using provide storage.
At receiver end, can use various treatment technologies to come to N RThe signal that receives is handled, to detect N TThe symbols streams of transmission.These receiver treatment technologies can be divided into two main kinds: (i) space and receiver treatment technology (it also can be called balancing technique) when empty; And (ii) " serial pulverised (nulling)/equilibrium and interference eliminated " receiver treatment technology (also can be called " serial interference elimination " or " serial elimination " receiver treatment technology).
Though Fig. 6 has described mimo system, same system also can be applicable to many single-input single-output system (SISO system)s, and wherein a plurality of transmitting antennas on being positioned at the base station are transmitted to single antenna equipment such as travelling carriage with one or more symbols streams.And, can use the antenna system of single output according to the mode identical with the mode of Fig. 6 description to single input.
Transmission technology described herein can realize by variety of way.For example, these technology can with hardware, firmware, software or it be in conjunction with realizing.Realize for hardware, the processing unit of transmitter can be at one or more application-specific IC (ASIC), digital signal processor (DSP), digital signal processing appts (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor, electronic equipment, be designed to carry out other electronic units of function described herein or its in conjunction with in be implemented.The processing unit at receiver place also can be implemented within one or more ASIC, DSP, processor etc.
Realize that for software transmission technology can realize with the module (program, function element etc.) of carrying out function as described herein.Software code can be stored in the memory (for example, the memory 832 or 872 among Fig. 6), and is carried out by processor (for example, processor 830 or 870).Memory can be in processor or in the outside realization of processor.
Should be noted that the notion of channel here is meant can be by the type of access point or access terminal information transmitted or transmission thing.It does not need or does not use fixing or predetermined block of sub-carriers, time period or be exclusively used in other resources of this transmission thing.
Fig. 7 is used for map flow chart 700 in the illustrative methods of the communication equipment of wireless communication system Resources allocation for operation such as base station, access point or central controller.Begin operation in step 702, wherein communication equipment is powered on and initialization, and enters step 704.In step 704, communication equipment selects to wait to be assigned with first wireless terminal of the communication resource, and in step 706, communication equipment selects to wait to be assigned with second wireless terminal of the communication resource.Operation enters step 708 from step 706.
In step 708, communication equipment will comprise that the resource allocation of at least two discontinuous portions of bandwidth gives first wireless terminal with a period of time, and the portions of bandwidth that these two discontinuous portions of bandwidth are not included in the described resource is separated.In various embodiments, discontinuous portions of bandwidth is by 1.25MHz separation at least.
Operation enters step 710 from step 708.In step 710, communication equipment is a corresponding resource of discontinuous portions of bandwidth in distribution of second wireless terminal and the described discontinuous portions of bandwidth in second time period, and described that portions of bandwidth in the described discontinuous portions of bandwidth is shared based on one of time division multiplexing and frequency division multiplexing by first wireless terminal and second wireless terminal.Operation enters step 711 from step 710.
In step 711, send the protection subcarrier information in communication equipment at least one discontinuous bandwidth in described discontinuous portions of bandwidth, this protection subcarrier information represents to protect the number of subcarrier and at least one in the position.In certain embodiments, the protection subcarrier of varying number is relevant with different discontinuous portions of bandwidth.In certain embodiments, at least some discontinuous portions of bandwidth have the protection subcarrier at diverse location.In each embodiment, the protection subcarrier information is broadcasted in lead code, for example, and super-frame preamble.Operation enters step 712 from step 711.
In step 712, communication equipment emission single assigned message, this message informing will distribute the resource that comprises at least two discontinuous portions of bandwidth to first wireless terminal.In certain embodiments, the assignment information of being launched comprises and one group of corresponding node identifier of subcarrier that this group subcarrier comprises at least one subcarrier that comes from each discontinuous portions of bandwidth in these at least two the discontinuous portions of bandwidth.In each embodiment, to distribute and comprise that according to channel trees be the first wireless terminal Resources allocation, this channel trees is represented and the corresponding subcarrier of communication channel that constitutes according to a plurality of discontinuous portions of bandwidth.
Operation enters step 714 from step 712.In step 714, communication equipment emission assignment information, being used for notice will distribute to second wireless terminal.
In certain embodiments, step 706,710 and 714 is optional step and can omits.
In certain embodiments, second wireless terminal is assigned with the resource that comprises at least two discontinuous portions of bandwidth that remains to be used with a period of time, and the portions of bandwidth that these two discontinuous portions of bandwidth are not included in the described resource is separated.
Step 716,718 and 720 is for comprising in certain embodiments abridged step in other embodiments.Operation enters step 716 from step 714.In step 716, be down-chain resource if distribute to the resource of first wireless terminal, then control communication equipment, to enter step 718 from step 716; Yet, be uplink resource if distribute to the resource of first wireless terminal, control communication equipment, to enter step 720 from step 716.Return step 718, in step 718, communication equipment emission comprises the ofdm signal at the information of described wireless terminal, and this ofdm signal comprises with described discontinuous part but not is not included in the corresponding tone of described portions of bandwidth in the described resource.Return step 720, in step 720, communication equipment is handled the ofdm signal that receives that comprises the information that comes from described first wireless terminal, and wherein said processing comprises filtering and the corresponding subcarrier of described part that is not included in the described bandwidth in the described resource.
In one exemplary embodiment, communication equipment is the base station, support among Fig. 3 by among first frequency bands of 302 expressions and Fig. 3 by the communication in second frequency bands of 306 expressions; Yet the communication in Fig. 3 midband 304 is not supported in the base station.Suppose that the zone by 304 expressions is at least 1.25MHz.Continue this example, suppose that first wireless terminal is assigned with the frequency band 302 that use comprises two discontinuous parts.The base station may be restricted to can not service band 304, because communication service supplier is not licensed in this frequency band of this position.Alternately, may can not communicate by letter in frequency band 304 owing to Interference Control in the base station.
Fig. 8 is the flow chart 1100 according to operation such as the illustrative methods of the wireless terminal that accesses terminal of each embodiment.Operate in step 1102 beginning, wherein wireless terminal is powered on and initialization.Operation enters step 1104 from beginning step 1102.In step 1104, wireless terminal receives the resource allocation message of resource allocation being given described wireless terminal a period of time, and this resource comprises at least two discontinuous portions of bandwidth of the portions of bandwidth separation that is not included in the described resource.In certain embodiments, discontinuous portions of bandwidth is by 1.25MHz separation at least.In certain embodiments, the protection subcarrier of varying number is relevant with different discontinuous portions of bandwidth.The resource of being distributed is passable, and is uplink resource sometimes.The resource of being distributed is passable, and is down-chain resource sometimes.Operation enters step 1106 from step 1104.
In step 1106, wireless terminal from the node identification and institute's canned data that the described resource allocation message that receives, receive, determine with will be by the corresponding one group of subcarrier of the described node identification that described wireless terminal uses.At some embodiment, this group subcarrier comprises at least one the protection subcarrier that comes from each discontinuous portions of bandwidth at least two discontinuous portions of bandwidth.Operation enters step 1108 from step 1106.
In step 1108, wireless terminal receives the protection subcarrier information, and this protection subcarrier information is represented to distribute at least one discontinuous portions of bandwidth of this wireless terminal and protected the position of subcarrier and at least one in the number.In each embodiment, receive the protection subcarrier information and comprise that reception comprises the broadcast preamble sign indicating number of protecting subcarrier information, for example, super-frame preamble.In certain embodiments, the number of the protection subcarrier of frequency band part edge is the function that is used to the communication protocol such as CDMA agreement or OFDM agreement in the adjacent frequency band.Then, in step 1110, wireless terminal is stored at least some described protection subcarrier information that receive, and the protection subcarrier information of described storage is represented the difference protection sub-carrier positions in the different bandwidth part.Operation enters step 1112 from step 1110.
In step 1112, wireless terminal uses the resource of described distribution to communicate by letter with the access point such as the base station.In certain embodiments, step 1112 comprises one or more step in the step 1114,1116,1118 and 1120.In step 1114, wireless terminal determines that the resource of being distributed is uplink resource or down-chain resource.If the resource of being distributed is a uplink resource, then operates and enter step 1116 from step 1114.If the resource of being distributed is a down-chain resource, then operates and enter step 1120 from step 1114.Return step 1116, in step 1116, wireless terminal generates the OFDM symbol comprise at the information of described access point, and described OFDM symbol comprises with described discontinuous portions of bandwidth but not the described corresponding tone of described portions of bandwidth that is not included in the described resource.In step 1118, wireless terminal uses the resource of being distributed to launch the OFDM symbol that is generated then.Return step 1120, in step 1120, wireless terminal is handled the OFDM symbol that receives that comprises the information that comes from described access point, and wherein said processing comprises filtering and is not included in the described resource of distributing but comprises the corresponding subcarrier of described part from the described bandwidth of the subcarrier of described at least two discontinuous parts.
Fig. 9 is the figure in the exemplary communication devices 900 of wireless communication system Resources allocation of being used for according to each embodiment, for example base station, access point or central control node.Exemplary communication devices 900 comprises wireless receiver module 902, transmitting set module 904, processor 906, Network Interface Module 908 and the memory 910 that is joined together by bus 912, by bus 912, and each element exchange data and information.Memory 910 comprises routine 918 and data/information 920.Such as processor 906 executive routines 918 of CPU and use data/information 920 in the memory 910 to control the operation and the manner of execution of communicator 900, for example method of the flow chart 700 of Fig. 7.
Wireless receiver module 902, for example OFDM or cdma receiver are connected to reception antenna 914, and communicator is via these reception antenna 914 received signals, and this signal comprises therefrom can measure interference signals.
Transmitting set module 904, for example OFDM or CDMA transmitter are connected to transmitting antenna 916, and communicator transmits via this transmitting antenna 916.Wireless machine end module 904 transmission resources distribute, and at least some resource allocations comprise to wireless terminal and distribute discontinuous portions of bandwidth.The assignment messages that 904 emissions of transmitting set module are generated (938 ..., 940).In certain embodiments, 904 emissions of transmitting set module comprise the OFDM symbol at the information of wireless terminal, this OFDM symbol comprises the tone corresponding to discontinuous part, but transmitting set module 904 forbids launching on the described portions of bandwidth in not being included in the resource of described distribution, for example, there is empty (null) zone in the institute's OFDM symbols transmitted between discontinuous part.Transmitting set module 904 is also broadcasted and is comprised the lead code of protecting band information, and this protection band information for example is the number of protection subcarrier in one or more discontinuous frequency band part of identification and/or the information of position.
In certain embodiments, identical antenna is used to transmit and receive.In certain embodiments, a plurality of antennas and/or a plurality of antenna element are used for receiving.In certain embodiments, a plurality of antennas and/or a plurality of antenna element are used for emission.In certain embodiments, at least some identical antennas or antenna element not only are used for emission but also be used for receiving.In certain embodiments, Wireless Telecom Equipment 900 adopts the MIMO technology.
Network Interface Module 908 is connected to other network nodes via network link 909, for example, and other access point/base stations, AAA node, home agent node etc., and/or internet.
Routine 918 comprises selects module 922, distribution module 924, transmission control module 930, symbol generation module 927, symbol to recover module 929 and lead code generation module 925.Distribution module 924 comprises resource distribution module 926 and assignment messages generation module 928.
Data/information 920 comprises air link resources structural information 932, selected wireless terminal information 934, assignment information 936, the assignment messages (assignment messages that is used for WT1938 that is generated, ..., be used for the assignment messages of WTn940) and channel trees resource information 942.Air link resources structural information 932 comprise with a plurality of air link resources (air link resources 1 information 944 ..., air link resources M information 946) the corresponding information and the information of the discontinuous portions of bandwidth 948 of identification.Air link resources 1 information 944 comprise with a plurality of parts (part 1 information 950 ..., part N information 952) corresponding information.Part 1 information 950 comprises frequency/time structure information 954, channel information 956 and protection band information 958.Part N information 952 comprises frequency/time structure information 960, channel information 962 and protection band information 964.At least some parts and other parts in the air link resources information 944 are discontinuous, for example, have the intermediate frequency band zone of a part that is not air link resources 1.
For example, the air link resources information of being stored of first communication band that the 944 representative expressions of air link resources 1 information can be used for distributing, and the air link resources information of being stored of the second communication frequency band that the 946 representative expressions of air link resources M information can be used for distributing.950 representatives of part 1 information are corresponding to the information of the first discontinuous portions of bandwidth in first communication band, and 952 representatives of part N information are corresponding to the information of the second discontinuous portions of bandwidth in first communication band.In certain embodiments, discontinuous portions of bandwidth is by 1.25MHz separation at least.Protection band information 958 comprises about at least one information in protection bandwidth number and the position in the part 1 of first communication band.Protection band information 964 comprises about at least one information in protection band data and the position in the part N of first communication band.In certain embodiments, the protection frequency band is one group one at borderline region place or subcarrier still less, for example, deliberately stays the not subcarrier of the boundary of usefulness.
Selected wireless terminal information 934 comprise identification by communication equipment 900 select to be assigned with information with a plurality of wireless terminals of air link resources (selected wireless terminal 1 identifying information 966 ..., selected WTn identifying information 968).Assignment information 936 comprise many group resource allocation informations (the WT1 resource allocation information 970 that comprises node identifier 974 ..., comprise the WTn resource allocation information 972 of node identifier 976).
Channel trees resource information 942 comprises the information of representing with the corresponding subcarrier of communication channel that is made of a plurality of discontinuous portions of bandwidth.
Select module 922 to select to be assigned with the wireless terminal of the communication resource.For example, select module 922 to select to be assigned with first wireless terminal of the communication resource.Selected wireless terminal information 934 is for selecting the output of module 922.
Resource distribution module 926 is given resource allocation the wireless terminal of selecting module 922 to select.For example, resource distribution module 926 will comprise that the resource allocation of at least two discontinuous portions of bandwidth give to select first wireless terminal that module 922 selects with a period of time, and the portions of bandwidth that described two discontinuous portions of bandwidth are not included in the described resource of distributing is separated.The resource of being distributed is passable, and is uplink resource sometimes.The resource of being distributed is passable, and is down-chain resource sometimes.Assignment information 936 is represented the output of resource distribution module 926.
Assignment messages generation module 928 generates the assignment messages that resource allocation is notified to wireless terminal.For example, assignment messages generation module 928 generates the single assigned message that distribution is comprised the resource of at least two discontinuous portions of bandwidth to first wireless terminal notice.In certain embodiments, assignment messages generation module 928 generates the assignment messages that comprises the node identifier corresponding with one group of subcarrier, and this group subcarrier comprises at least one subcarrier that comes from each discontinuous portions of bandwidth at least two discontinuous portions of bandwidth.The assignment messages that is generated (938 ..., 940) represent the output of assignment messages generation module 928.
Transmission control module 930 control transmitting set modules 904 transmit, for example, and lead code, assignment messages, downlink traffic channel signals and downlink control channel signal.
Symbol generation module 927 generates ofdm signal.At some embodiment, the OFDM symbol that at least some generated comprises with the discontinuous part of frequency band but not is not included in the corresponding tone of described portions of bandwidth of described resource of distributing.For example, consider, the OFDM symbol that is generated is not used by communication equipment corresponding to the frequency band and the frequency band 304 of 302 representatives of element among Fig. 3, the exemplary OFDM symbol that is generated comprises the subcarrier corresponding to 302 tops and 302 bottoms, but does not comprise the subcarrier corresponding to frequency band 304 zones.
929 pairs of modules of symbol recovery come from the information of the OFDM symbol that receives and recover.In certain embodiments, comprise the frequency band of discontinuous part at least some, symbol recovers module 929 filterings and is not included in subcarrier in the portions of bandwidth in the resource of being distributed, for example, and the part between two discontinuous parts.
Lead code generation module 925 generates lead code, for example, is used for the lead code of superframe, and this lead code transmits the protection band information, for example at least some protection band informations (958,964).
Figure 10 is the figure according to the example wireless terminal such as accessing terminal 1000 of each embodiment.Example wireless terminal 1000 comprises wireless receiver module 1002, transmitting set module 1004, processor 1006, user I/O equipment 1008 and the memory 1010 that is joined together via bus 1012, by bus 1012, each element exchange data and information.Memory 1010 comprises routine 1018 and data/information 1020.Such as processor 1006 executive routines 1018 of CPU, and the data/information 1020 in the use memory 1010 is controlled the operation and the manner of execution of wireless terminal 1000, for example method of Fig. 8 flow chart 1100.
Wireless receiver module 1002 such as the OFDM receiver is connected to reception antenna 1014, wireless terminal 1000 via this reception antenna 1014 from communication equipment receiving downlink signal such as access point.Wireless receiver module 1002 receives lead code, and described lead code transmits the protection subcarrier information.Wireless receiver module 1002 also receives information transmitted in the forward link frame, for example, and downlink traffic data and control data.Wireless receiver module 1002 receives resource allocation message, for example, message 1028, described resource allocation message represents to distribute in a period of time the resource of described wireless terminal 1000, this resource comprises at least two discontinuous portions of bandwidth of the portions of bandwidth separation that is not included in the described resource.For example, resource allocation message 1028 can represent that wireless terminal 1000 has been assigned with 302 air link resources that refer among Fig. 3.The resource of being distributed is passable, and is uplink resource sometimes.The resource of being distributed is passable, and is down-chain resource sometimes.
In certain embodiments, the protection subcarrier of varying number can, and relevant with different discontinuous portions of bandwidth sometimes.In each embodiment, discontinuous portions of bandwidth is by 1.25MHz separation at least.
Transmitting set module 1004 such as the OFDM transmitter is connected to transmitting antenna 1016, wireless terminal 1000 via this transmitting antenna 1016 to communication equipment transmission of uplink signal such as access point.The symbol that transmitter module 1004 emissions are generated by signal generation module 1022, for example, the OFDM symbol.Sometimes, the symbol that is generated comprises two corresponding subcarriers of discontinuous part with the resource that has been assigned with, and comprises the dummy section of deliberately reserving between two discontinuous parts.
In certain embodiments, identical antenna is used to transmit and receive.In certain embodiments, a plurality of antennas and/or a plurality of antenna element are used for receiving.In certain embodiments, a plurality of antennas and/or a plurality of antenna element are used for emission.In certain embodiments, at least some identical antennas or antenna element not only are used for emission but also be used for receiving.In certain embodiments, wireless terminal 1000 adopts the MIMO technology.
User I/O equipment 1008 comprises for example microphone, keyboard, auxiliary keyboard, switch, camera, loud speaker, display etc.User I/O equipment 1008 allows the user input data/information of wireless terminal 1000, visit dateout/information, and at least some functions of control wireless terminal 1000, for example, initiate and peer nodes between communication session, for example with the communication session of another wireless terminal.
Routine 1018 comprises that symbol generation module 1022, symbol recover module 1024 and the protection subcarrier information is recovered module 1026.Data/information 1020 comprises the resource allocation message 1028 that is received, the protection subcarrier information 1032 that is received and node identifier/subcarrier map information 1033.The resource allocation message 1028 that is received comprises node identifier 1030.The protection subcarrier information 1032 that is received comprises the information of different protection sub-carrier positions in the different discontinuous portions of bandwidth of expression.In certain embodiments, from the lead code such as the lead code of superframe that receives, extract the protection subcarrier information.Node identifier/subcarrier map information 1033 comprises the sub carrier group corresponding to node identifier, ((node identifier 11034 and corresponding sub carrier group 11038) ..., (node identifier N1036 and corresponding sub carrier group N1040)).In each embodiment, comprise at least one protection subcarrier corresponding to the sub carrier group of node identifier, its come from by each discontinuous portions of bandwidth in corresponding at least two the discontinuous portions of bandwidth of resource of this node identifier identification.
The symbol that symbol generation module 1022 generates corresponding to the resource of being distributed.In certain embodiments, symbol generation module 1022 is to generate the OFDM symbol generation module comprise at the OFDM symbol of the information of access point, and described OFDM symbol comprises corresponding to described discontinuous part but not is not included in the tone of the described portions of bandwidth in the described resource.Tone also can, and be called as subcarrier sometimes.
Symbol recovers the symbol such as the OFDM symbol that module 1024 is recovered corresponding to the resource of being distributed.If the resource of being distributed comprises two discontinuous parts that the part that is not included in this resource is separated, so as the part of recovery operation, symbol recovers module 1024 filterings and is not included in subcarrier in the portions of bandwidth in this resource.
The protection subcarrier information is recovered 1026 pairs of information that receive of module and is recovered at least one at least one described discontinuous portions of bandwidth of this information representation in protection number of sub carrier wave and the position.
The foregoing description of disclosed embodiment is provided to make any those skilled in the art can obtain or use each feature.Various modifications to these embodiment are apparent to those skilled in the art, and the general principle that limits here can be applied among other embodiment under the situation that does not deviate from its spirit and scope.Therefore, each embodiment is not intended to limit and is the embodiment that illustrates here, but meets and principle disclosed herein and the corresponding to wide region of new feature.
In each embodiment, utilize one or more module execution and the corresponding step of one or more method of scheme to realize node described herein, this step for example signal processing, message generates and/or step of transmitting.Therefore, in certain embodiments, each feature realizes with module.The combination of this module available software, hardware or software and hardware realizes.Above-mentioned many methods or method step can use be included in the machine readable media such as the machine-executable instruction of software control machine in one or more nodes for example, to finish all or part of realization the in the said method, wherein, machine readable media for example is the memory device such as RAM, floppy disk, CD, DVD etc., and machine is the all-purpose computer for having or do not have additional hardware for example.Therefore, this scheme is especially paid close attention to machine readable media, comprises the machine execution command of one or more step of the machine execution said method that is used for making such as processor and related hardware.
In each embodiment, use one or more module to carry out and realize node described herein with the corresponding step of one or more method, for example, signal processing, message generate, information is recovered, and/or step of transmitting.In certain embodiments, realize each feature with module.The combination of these module available software, hardware or software and hardware realizes.Many above-mentioned methods or method step can use and be included in the machine readable media such as the machine-executable instruction control machine of software to finish all or part of realization the in the said method in one or more node for example, wherein, this machine readable media for example is the memory device such as RAM, floppy disk, CD, DVD etc., and machine is the all-purpose computer for having or do not have additional hardware for example.Therefore, each embodiment especially pays close attention to machine readable media, comprises the machine execution command of one or more step of the machine execution said method that is used for making such as processor and related hardware.
In certain embodiments, such as access terminal and/or access point processor or a plurality of processor such as CPU of one or more equipment of communication equipment, be configured to carry out the step that is described to by the performed method of communication equipment.The configuration of processor can be finished by adopting one or more module controls processor such as software module dispose, and/or disposes and finish to carry out described step and/or processor controls by comprising in processor such as the hardware of hardware module.Therefore, some but not all embodiment pay close attention to the processor device that has such as communication equipments, this processor comprises the corresponding module of each step in the step with the various described methods of being carried out by the equipment that comprises processor.At some but not among all embodiment, comprise the corresponding module of each step in the step with the various described methods of carrying out by the equipment that comprises processor such as the equipment of communication equipment.Module available software and/or hardware are realized.
The a large amount of extra variation of said method and device it will be apparent to those skilled in the art because of above description.This variation should be considered to fall within the scope.The method and apparatus of each embodiment can, and in each embodiment, with CDMA, OFDM (OFDM) and/or be used in access node and mobile node between provide the other kinds type communication technology of wireless communication link to use.In certain embodiments, access node is implemented as the base station, and communication link is set up with OFDM and/or CDMA and mobile node in the base station.In each embodiment, mobile node is implemented as notebook computer, PDA(Personal Digital Assistant) or comprises receiver/transmitter circuitry and other portable sets of logic and/or routine, is used to carry out the method for each embodiment.

Claims (72)

1, a kind of being used for comprises in the wireless communication system method of allocating resources:
Selection waits to be assigned with first wireless terminal of the communication resource; With
In a period of time, comprise separated at least two the discontinuous portions of bandwidth of the portions of bandwidth that is not included in the described resource for this first wireless terminal, this resource resource allocation.
2, method according to claim 1, wherein the protection subcarrier of different numbers is relevant with different discontinuous portions of bandwidth.
3, method according to claim 1 further comprises:
Emission protection subcarrier information, this protection subcarrier information is represented the number of the protection subcarrier at least one described discontinuous portions of bandwidth and at least one in the position.
4, method according to claim 3, at least some the discontinuous portions of bandwidth in the wherein said discontinuous portions of bandwidth have the protection subcarrier that is positioned at diverse location.
5, method according to claim 3, wherein said protection subcarrier information is broadcasted in lead code.
6, method according to claim 1 further comprises:
Emission single assigned message, this single assigned message transmits the assignment information of the described resource that comprises described at least two discontinuous portions of bandwidth to described first wireless terminal.
7, method according to claim 6 further comprises:
During second time period, a resource that discontinuous portions of bandwidth is corresponding in second terminal distribution and described discontinuous portions of bandwidth, this discontinuous portions of bandwidth in the described discontinuous portions of bandwidth is based on being shared by described first wireless terminal and described second wireless terminal one of in time division multiplexing and the frequency division multiplexing.
8, method according to claim 6, the wherein said discontinuous portions of bandwidth 1.25MHz of being separated by at least.
9, method according to claim 6, the wherein said assignment messages that is launched comprises the node identifier corresponding to one group of subcarrier, and this group subcarrier comprises at least one subcarrier that comes from each the discontinuous portions of bandwidth in described at least two discontinuous portions of bandwidth.
10, method according to claim 6 is wherein distributed and is comprised that based on channel trees be the described first terminal distribution resource, and this channel trees is represented and the corresponding subcarrier of communication channel that is made of a plurality of discontinuous portions of bandwidth.
11, method according to claim 6, wherein said resource is a uplink resource.
12, method according to claim 6, wherein said resource is a down-chain resource.
13, method according to claim 1 further comprises:
Emission comprises that the ofdm signal of the information that mails to described wireless terminal, this ofdm signal comprise with described discontinuous portions of bandwidth but not be not included in the corresponding tone of described portions of bandwidth in the described resource.
14, a kind of communicator that is used in the wireless communication system Resources allocation, this device comprises:
Select module, be used to select to wait to be assigned with first wireless terminal of the communication resource; With
Resource distribution module was used for giving first wireless terminal of being selected by described selection module with resource allocation in a period of time, and this resource comprises separated at least two the discontinuous portions of bandwidth of the portions of bandwidth that is not included in the described resource.
15, device according to claim 14 further comprises:
The assignment messages generation module is used to generate single assigned message, and this single assigned message transmits the assignment information of the resource that comprises described at least two discontinuous portions of bandwidth to described first wireless terminal; With
The transmitting set module is used to launch the assignment messages that is generated.
16, device according to claim 15 further comprises:
Memory comprises air link resources information stored, the expression communication band that can be used for distributing, and described information comprises about at least one the information in protection number of frequency bands and the position in the available communication band.
17, device according to claim 16 further comprises:
Memory comprises stored, that identification can be used for distributing and the air link resources information corresponding different discontinuous portions of bandwidth of resource.
18, device according to claim 17, the wherein said discontinuous portions of bandwidth 1.25MHz of being separated by at least.
19, device according to claim 15, wherein said assignment messages generation module generates the assignment messages that comprises corresponding to the node identifier of one group of subcarrier, and this group subcarrier comprises at least one subcarrier that comes from each the discontinuous portions of bandwidth in described at least two discontinuous portions of bandwidth.
20, device according to claim 17, wherein said memory further comprises the channel trees resource information, its expression and the corresponding subcarrier of communication channel that is made of a plurality of discontinuous portions of bandwidth.
21, device according to claim 15, wherein said resource is a uplink resource.
22, device according to claim 15, wherein said resource is a down-chain resource.
23, device according to claim 14 further comprises:
The symbol generation module is used for generating and comprises with described discontinuous portions of bandwidth but not be not included in the OFDM symbol of the corresponding tone of portions of bandwidth of described resource; With
The wireless OFDM transmitter module is used to launch the ofdm signal that comprises the information that mails to described wireless terminal, and this ofdm signal comprises with described discontinuous portions of bandwidth but not is not included in the corresponding tone of described portions of bandwidth in the described resource.
24, a kind of communicator that is used in the wireless communication system Resources allocation, this device comprises:
Selected cell is used to select to wait to be assigned with first wireless terminal of the communication resource; With
Be used in a period of time resource allocation being given the unit of first wireless terminal of being selected by described selected cell, this resource comprises separated at least two the discontinuous portions of bandwidth of the portions of bandwidth that is not included in the described resource.
25, device according to claim 24 further comprises:
Be used to generate the unit of single assigned message, this single assigned message transmits the assignment information of the resource that comprises described at least two discontinuous portions of bandwidth to described first wireless terminal; With
Be used to launch the unit of the assignment messages that is generated.
26, device according to claim 25 further comprises:
Memory cell comprises air link resources information stored, the expression communication band that can be used for distributing, and described information comprises about at least one the information in protection number of frequency bands and the position in the available communication band.
27, device according to claim 25, the described unit that wherein is used to generate generates the assignment messages that comprises corresponding to the node identifier of one group of subcarrier, and this group subcarrier comprises at least one subcarrier that comes from each the discontinuous portions of bandwidth in described at least two discontinuous portions of bandwidth.
28, device according to claim 24 further comprises:
Be used for generating and comprise with described discontinuous portions of bandwidth but not be not included in the unit of OFDM symbol of the corresponding tone of portions of bandwidth of described resource; With
Be used to launch the unit of the ofdm signal that comprises the information that mails to described wireless terminal, this ofdm signal comprises with described discontinuous portions of bandwidth but not is not included in the corresponding tone of described portions of bandwidth in the described resource.
29, a kind of device comprises:
Processor is configured to:
Selection waits to be assigned with first wireless terminal of the communication resource; With
In a period of time, comprise separated at least two the discontinuous portions of bandwidth of the portions of bandwidth that is not included in the described resource for this first wireless terminal, this resource resource allocation.
30, device according to claim 29, wherein the protection subcarrier of different numbers is relevant with different discontinuous portions of bandwidth.
31, device according to claim 29, wherein said processor further is configured to:
Emission protection subcarrier information, this protection subcarrier information is represented the number of the protection subcarrier at least one described discontinuous portions of bandwidth and at least one in the position.
32, device according to claim 29, wherein said processor further is configured to:
Emission single assigned message, this single assigned message transmits the assignment information of the described resource that comprises described at least two discontinuous portions of bandwidth to described first wireless terminal.
33, device according to claim 29, wherein said processor further is configured to:
Emission comprises that the ofdm signal of the information that mails to described wireless terminal, this ofdm signal comprise with described discontinuous portions of bandwidth but not be not included in the corresponding tone of described portions of bandwidth in the described resource.
34, a kind of computer-readable medium comprises being used for controlling communication equipment to carry out the machine-executable instruction in the wireless communication system method of allocating resources, and this method comprises:
Selection waits to be assigned with first wireless terminal of the communication resource; With
In a period of time, comprise separated at least two the discontinuous portions of bandwidth of the portions of bandwidth that is not included in the described resource for this first wireless terminal, this resource resource allocation.
35, computer-readable medium according to claim 34, wherein the protection subcarrier of different numbers is relevant with different discontinuous portions of bandwidth.
36, computer-readable medium according to claim 34 further comprises machine-executable instruction, is used for:
Emission protection subcarrier information, this protection subcarrier information is represented the number of the protection subcarrier at least one described discontinuous portions of bandwidth and at least one in the position.
37, computer-readable medium according to claim 34 further comprises machine-executable instruction, is used for:
Emission single assigned message, this single assigned message transmits the assignment information of the described resource that comprises described at least two discontinuous portions of bandwidth to described first wireless terminal.
38, computer-readable medium according to claim 34 further comprises machine-executable instruction, is used for:
Emission comprises that the ofdm signal of the information that mails to described wireless terminal, this ofdm signal comprise with described discontinuous portions of bandwidth but not be not included in the corresponding tone of described portions of bandwidth in the described resource.
39, a kind of method of operate wireless terminal comprises:
Receive resource allocation message, it is interior to described wireless terminal Resources allocation that this message table is shown in a period of time, and this resource comprises separated at least two the discontinuous portions of bandwidth of the portions of bandwidth that is not included in the described resource; With
Use the resource of described distribution to communicate by letter with access point.
40, according to the described method of claim 39, wherein the protection subcarrier of different numbers is relevant with different discontinuous portions of bandwidth.
41, according to the described method of claim 39, further comprise:
Receive the protection subcarrier information, this protection subcarrier information is represented the number of the protection subcarrier at least one described discontinuous portions of bandwidth and at least one in the position.
42, according to the described method of claim 41, further comprise:
Store at least some described protection subcarrier information that receive, the protection subcarrier information of described storage is represented the difference protection sub-carrier positions in the different discontinuous portions of bandwidth.
43,, wherein receive the protection subcarrier information and comprise: receive the broadcast preamble sign indicating number that comprises described protection subcarrier information according to the described method of claim 41.
44, according to the described method of claim 39, the wherein said discontinuous portions of bandwidth 1.25MHz of being separated by at least.
45, according to the described method of claim 44, the assignment messages of wherein said reception comprises node identifier, and this method further comprises:
Determine from described node identifier and institute's canned data and the corresponding one group of subcarrier of described node identifier that is used by described wireless terminal that this group subcarrier comprises at least one protection subcarrier of each the discontinuous portions of bandwidth that comes from described at least two discontinuous portions of bandwidth.
46, according to the described method of claim 44, wherein said resource is a uplink resource.
47, according to the described method of claim 46, further comprise:
Generation comprises the OFDM symbol of the information that mails to described access point, and described OFDM symbol comprises with described discontinuous portions of bandwidth but not is not included in the corresponding tone of portions of bandwidth in the described resource; And
Wherein use described resource of distributing to comprise the OFDM symbol of launching described generation.
48, according to the described method of claim 44, wherein said resource is a down-chain resource.
49, a kind of wireless terminal comprises:
Receiver module is used to receive resource allocation message, and it is interior to described wireless terminal Resources allocation that this message table is shown in a period of time, and this resource comprises separated at least two the discontinuous portions of bandwidth of the portions of bandwidth that is not included in the described resource; With
With lower module one of at least:
I) symbol generation module is used to generate the symbol corresponding to the resource of being distributed; With
Ii) symbol recovers module, is used to recover the symbol corresponding to the resource of being distributed.
50, according to the described wireless terminal of claim 49, wherein the protection subcarrier of varying number is relevant with different discontinuous portions of bandwidth.
51, according to the described wireless terminal of claim 49, further comprise:
The protection subcarrier information is recovered module, is used to the information recovering to receive, the protection number of sub carrier wave at least one described discontinuous portions of bandwidth of this information representation and at least one in the position.
52, according to the described wireless terminal of claim 51, further comprise:
Memory module is used to store at least some of the described protection subcarrier information that receives, and described stored protection subcarrier information is illustrated in the different protection sub-carrier positions in the different discontinuous portions of bandwidth.
53, according to the described wireless terminal of claim 49, the wherein said discontinuous portions of bandwidth 1.25MHz of being separated by at least.
54, according to the described wireless terminal of claim 53, the wherein said assignment messages that receives comprises node identifier, and this wireless terminal further comprises:
Memory module comprises that the information of one group of stored, that expression is corresponding with described node identifier subcarrier, this group subcarrier comprise at least one protection subcarrier of each the discontinuous portions of bandwidth that comes from described at least two discontinuous portions of bandwidth.
55, according to the described wireless terminal of claim 53, wherein said resource is a uplink resource.
56, according to the described wireless terminal of claim 55, further comprise:
Wherein said symbol generation module is an OFDM symbol generation module, this OFDM symbol generation module generates the OFDM symbol that comprises the information that mails to described access point, and described OFDM symbol comprises with described discontinuous portions of bandwidth but not is not included in the corresponding tone of described portions of bandwidth in the described resource; With
Transmitter module is used to launch the OFDM symbol that is generated by described OFDM symbol generation module.
57, according to the described wireless terminal of claim 53, wherein said resource is a down-chain resource.
58, a kind of wireless terminal comprises:
Receiver unit is used to receive resource allocation message, and it is interior to described wireless terminal Resources allocation that this message table is shown in a period of time, and this resource comprises separated at least two the discontinuous portions of bandwidth of the portions of bandwidth that is not included in the described resource; With
With lower unit one of at least:
I) be used to generate unit corresponding to the symbol of the resource of being distributed; With
Ii) be used to recover unit corresponding to the symbol of the resource of being distributed.
59, according to the described wireless terminal of claim 58, wherein the protection subcarrier of varying number is relevant with different discontinuous portions of bandwidth.
60, according to the described wireless terminal of claim 58, further comprise:
Protection subcarrier information recovery unit is used to the information recovering to receive, the protection number of sub carrier wave at least one described discontinuous bandwidth of this information representation and at least one in the position.
61, according to the described wireless terminal of claim 60, further comprise:
Memory cell is used to store at least some of the described protection subcarrier information that receives, and described stored protection subcarrier information is illustrated in the different protection sub-carrier positions in the different discontinuous portions of bandwidth.
62, according to the described wireless terminal of claim 58, the wherein said discontinuous portions of bandwidth 1.25MHz of being separated by at least.
63, a kind of device comprises:
Be used in the processor in the wireless terminal, this processor is configured to:
Receive resource allocation message, it is interior to described wireless terminal Resources allocation that this message table is shown in a period of time, and this resource comprises separated at least two the discontinuous portions of bandwidth of the portions of bandwidth that is not included in the described resource; With
Use described resource of distributing to communicate by letter with access point.
64, according to the described device of claim 63, wherein the protection subcarrier of varying number is relevant with different discontinuous portions of bandwidth.
65, according to the described device of claim 63, wherein said processor further is configured to:
Receive the protection subcarrier information, this protection subcarrier information is represented protection number of sub carrier wave at least one described discontinuous portions of bandwidth and at least one in the position.
66, according to the described device of claim 63, the wherein said discontinuous portions of bandwidth 1.25MHz of being separated by at least.
67, according to the described device of claim 66, the wherein said assignment messages that receives comprises node identifier, and wherein said processor further is configured to:
Determine from described node identifier and institute's canned data and the corresponding one group of subcarrier of described node identifier that is used by described wireless terminal that this group subcarrier comprises at least one protection subcarrier of each the discontinuous portions of bandwidth that comes from described at least two discontinuous portions of bandwidth.
68, a kind of computer-readable medium comprises being used to control wireless terminal with the machine-executable instruction of execution with the method for another communication apparatus communication, and this method comprises:
Receive resource allocation message, it is interior to described wireless terminal Resources allocation that this message table is shown in a period of time, and this resource comprises separated at least two the discontinuous portions of bandwidth of the portions of bandwidth that is not included in the described resource; With
Use the resource of described distribution to communicate by letter with access point.
69, according to the described computer-readable medium of claim 68, wherein the protection subcarrier of different numbers is relevant with different discontinuous portions of bandwidth.
70, according to the described computer-readable medium of claim 68, further comprise machine-executable instruction, be used for:
Receive the protection subcarrier information, this protection subcarrier information is represented protection number of sub carrier wave at least one described discontinuous portions of bandwidth and at least one in the position.
71, according to the described computer-readable medium of claim 68, the wherein said discontinuous portions of bandwidth 1.25MHz of being separated by at least.
72, according to the described computer-readable medium of claim 71, the wherein said assignment messages that receives comprises node identifier, and this computer-readable medium further comprises machine-executable instruction, is used for:
Determine from described node identifier and institute's canned data and the corresponding one group of subcarrier of described node identifier that is used by described wireless terminal that this group subcarrier comprises at least one protection subcarrier of each the discontinuous portions of bandwidth that comes from described at least two discontinuous portions of bandwidth.
CNA2007800228459A 2006-06-21 2007-06-21 Wireless resource allocation methods and apparatus Pending CN101473619A (en)

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