CN1954534B - Methods and apparatus for flexible spectrum allocation in communication systems - Google Patents
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Abstract
The disclosed embodiments provide for methods and systems for flexibly allocating a shared frequency spectrum to a plurality of users, the spectrum may have a first number of segments, each segment having a second number of clusters associated with a certain sector/cell. In one aspect, a method for flexibly allocating a shared frequency spectrum to a plurality of users comprises the acts of fixedly assigning a first group of clusters to a first group of users, such that the first group of users stay fixed to the assigned clusters, and assigning a second group of clusters to a second group of users, such that the second group of users hop within the assigned clusters.
Description
The cross reference of related application
The exercise question that present patent application requires on March 19th, 2004 to submit to is the provisional application No.60/554 of " FlexibleSpectrum Allocation in OFDMA ", 899 priority, this provisional application has transferred the application's assignee, and clearly it is incorporated into herein by reference hereby.
Technical field
Present invention relates in general to communication, and more specifically, relate to the technology that is used for flexible spectrum being distributed to a plurality of users in communication system.
Background technology
Adopt communication system so that the various communication services such as voice, grouped data etc. to be provided widely.These systems can be time-division, frequency division and/or code division multiple access system, and it can support to communicate simultaneously with a plurality of users by free system resources is shared.The example of this multi-address system comprises that code division multiple access (CDMA) system, CDMA multiple carrier (MC-CDMA), wideband CDMA (W-CDMA), high-speed downlink packet insert (HSDPA), time division multiple access (TDMA) system, frequency division multiple access (FDMA) system and OFDM (OFDMA) system.
Communication system can the utilized bandwidth branch be equipped with and avoids interference and improve link reliability.Therefore, there is demand in the art to the flexible bandwidth distribution technique that is used to improve interference.
Summary of the invention
The disclosed embodiments provide and have been used for distributing to a plurality of users' method and system with sharing flexible spectrum.Described frequency spectrum can have the segmentation of first number, each segmentation have second number that is associated with certain sectors/cells bunch.On the one hand, a kind of method that is used for shared flexible spectrum is distributed to a plurality of users has been described, this method comprises following action: with the first group of bunch of fixed assignment give first group of user, make win group user fixed dwell assigned bunch on, and with the second group of bunch of branch task second group of user, make second group of user assigned bunch in carry out frequency hopping.
Description of drawings
In conjunction with the accompanying drawings, from detailed description hereinafter, it is more obvious that feature of the present invention and characteristic will become, and in the accompanying drawings, identical reference symbol runs through full text and is consistent, and wherein:
Fig. 1 shows and is used to carry out the embodiment that frequency spectrum is cut apart;
Fig. 2 shows and is used to carry out the embodiment that flexible spectrum distributes; And
The block diagram that Fig. 3 shows access point and accesses terminal.
Embodiment
Here employed word " exemplary " refers to " as example, example or illustration ".Here being described as any embodiment of " exemplary " or design, needn't to be interpreted as with respect to other embodiment or design be preferred or favourable.
" access terminal " and refer to be provided to the equipment of user's voice and/or data connection.Can be connected to accessing terminal such as laptop computer or the such computing equipment of desktop computer, perhaps accessing terminal can be such as the such equipment of providing for oneself of personal digital assistant.Can also be called subscriber unit, travelling carriage, mobile phone, distant station, remote terminal, user terminal, user agent or subscriber equipment with accessing terminal.Access terminal can be that subscriber station, wireless device, cell phone, pcs telephone, cordless telephone, Session Initiation Protocol phone, wireless local loop (WLL) are stood, PDA(Personal Digital Assistant), handheld device or other treatment facility that is connected to radio modem with wireless connections ability.
" access point " refers to an access the equipment in the network, and this equipment aloft communicates with accessing terminal by one or more sectors on the interface.Access point as access terminal and the access network remainder between router, be converted to IP grouping by the air interface frame that will be received, described access network can comprise IP network.Access point is also adjusted the attribute management of air interface.
Fig. 1 shows and is used to carry out the embodiment that frequency spectrum is cut apart.For example, forward link (FL) in the OFDMA system and/or reverse link (RL) channel spectrum can comprise N orthogonal sub-carriers or tone (tone).In an embodiment as shown in Figure 1, the set of N tone can be divided into N
s Individual segmentation 102, the size of each segmentation are M
sIndividual periodicity pitch.In one embodiment, segmentation is continual in frequency spectrum, and other arrangement also is possible.
In one embodiment, each segmentation is subdivided into N
cA set of individual bunch 104, the size of each bunch is M
cIndividual tone, this N
cA set of individual bunch is associated with each sectors/cells 108,110.In one embodiment, the cocooning tool that is associated with a sectors/cells has nonoverlapping subcarrier to assign.In the example that provides in Fig. 1, fragment size is M
s=32 tones, and for each sectors/cells 108,110, though imagination can use arbitrary number tone and/or bunch, will be divided into size such as first segmentation, 106 at least one such segmentation is M
cThe N of=8 tones
c=4 bunches.For each sectors/cells 108,110, shown in Figure 1 bunch 104 has interruption, nonoverlapping subcarrier dispatched mode, and the adjacent sector/cell in the network has different bunch patterns.According to an embodiment, with each bunch that is associated such as the such sectors/cells in sector 108 with respect to being different with each bunch that is associated such as another such sectors/cells of sector 110.
In one embodiment, for identical bunch set of modes is used in some or all segmentation in given sector/sub-district, and can use the feature of this bunch of pattern as sectors/cells.Can define a bunch set of modes by the ID that comprises segmentation ID and/or bunch ID, can in acquisition phase, this ID be sent to access terminal (AT), perhaps replacedly, this ID can be linked to the lock-on signal of sectors/cells.As discussed below, the appropriate design of bunch set of modes has improved the user interface diversity.
In one embodiment, as shown in fig. 1, given bunch (subchannel) in the given segmentation can be distributed to a user.Replacedly, can with in the given segmentation more than one bunch or more than distributing to a user more than one bunch in the segmentation.Though the imagination partition size can be the tone of arbitrary number, in the example of Fig. 1, partition size is M
c=8 tones.Can in single or multiple assignment, assign a plurality of bunches for the user.More details have hereinafter been provided about assignment strategy.
In one embodiment, the project that can control channel is provided or in control channel, send for each user, for example, at the channel quality indication (CQI) of each segmentation.Can be from calculating CQI for the channel characteristics that some or all tone obtained.For example, by to such as averaging, can obtain the consequent CQI of this segmentation from quality metrics such as the SNR of the part or all of tone of each segmentation, Shannon capacities.
In one embodiment, (channel sensitivescheduling, CSS) standard are discerned " the best " between given segmentation and user coupling to follow certain channel sensitive scheduling.In one embodiment, can use the channel information on RL and/or the FL user to be dispatched to one or more segmentations of sharing frequency spectrum.As long as have one bunch at least for empty, scheduler just can be assigned one or more bunches for the user.This assignment can be based on good channel quality, and is for example measured according to channel gain, and can expect the channel quality of guaranteeing that this is good.In case assign, the user may be exposed to each interference user of working in adjacent sector/cell.As mentioned in conjunction with Fig. 1 discussed, guaranteed not have user or the seldom a part of user are exposed to single interference source corresponding to the difference of bunch set of modes of different sectors/cells, therefore guaranteed interference diversity.
In example shown in Figure 1, be associated with given sector/sub-district 108 any bunch and be associated with adjacent sector/cell 110 bunch in the bandwidth of each overlapping equal amount or the tone of equal number.For current example, such bunch overlapping in two tones, but different in six tones.Therefore, disclosed cutting apart, the N shown in Fig. 1
c=4 bunches and user of each bunch have improved interference diversity.In a similar fashion, can be designed for bunch set of modes of other adjacent sector/cell, to guarantee the absolutely dry diversity of disturbing.The absolutely dry diversity situation of disturbing as described above supposes do not have the user to be assigned two or more bunches in the same segment.Usually, for example, as discussing after a while, when having assigned whole shared bandwidth most of for unique user, can assign in the same segment two or more bunches for the user.
Aforesaid example provides the example about channel sensitive scheduling (CSS) how to guarantee to have interference diversity.Follow this principle, by being N
s, M
cAnd N
cSelect suitable value, the expectation that can obtain between channel assignment granularity, interference diversity and the CSS efficient is compromise.Compare with other bandwidth allocation techniques, disclosed allocated bandwidth strategy can not be introduced in any expense in the assigned bandwidth.
In one embodiment, total bit number that can be used for allocated bandwidth is [log
2(N
s)]+[log
2(N
c)].In one embodiment, owing to do not waste tone,, make so bandwidth division is " closely "
N
s·N
c·M
c＝N
In this case, obtain [log
2(N
s)]+[log
2(N
c)]≤[log
2(N/M
c)]+1, and [log
2(N/M
c)] be in system with N tone, supposing does not have overlapping tone, distributes to comprise M
cA bunch of required minimum bit number of individual tone.
In one embodiment, can use the channel quality information on RL and/or the FL, for example on shared frequency spectrum, the user is dispatched according to the CSS dispatching method of above being discussed.For not moving or the slow user terminal of motion, constant or when very slowly changing when channel quality, for example, can use the CSS method for the user of walking.In one embodiment, at least one fixed assignment in the first group bunch of frequency sub-carrier is given among first group of such user each.In this static state or fixed assignment, wherein each among first group of user all is not move or slowly motion, with at least one in the first group bunch of each fixed assignment among first group of user, till this user is assigned again, for example cause owing to the variation of channel quality, speed, Doppler effect or such as the such indication of NACK that is not received as some grouping.
In one embodiment, will share spectrum allocation may and give second group of user, this second group of user can have variable degree of excursion and/or channel quality, perhaps when frequently receiving NACK.In one embodiment, for example, for the user terminal of rapid movement and/or the user that experiencing Doppler effect, for example vehicle user can be used frequency hopping (FH) method, so that the quick variation of channel quality and/or speed is compensated.In one embodiment, second group of user (dynamically) can be assigned to the second group bunch, make described user in one group bunch that is assigned, carry out frequency hopping.
In one embodiment, when from the changing of the user among the first group of user who is operated under the CSS scheduling method, this user can be reassigned to the second group of user who is operated under the FH pattern such as in the characteristics such as speed of channel quality, mobility, Doppler effect, generation NACK at least one.In one embodiment, one group bunch that can assign for CSS for FH assigns again, and vice versa.
Fig. 2 shows an embodiment who is used to realize flexible spectrum is distributed to a plurality of different users.To bunch grouping or related making can between user who is dispatched by CSS and the user who is dispatched by FH, carry out bandwidth division and/or distribution flexibly.Can with from identical and/or different segmentations bunch to be grouped into specific size be N
gA plurality of groups.For access point, some or all accesses terminal or the two is whole, the group structure can be known.The group structure can be fix and by the group ID specify each group.Be similar to bunch set of modes as discussed above, for different sectors/cells, the group structure can be different.The difference of the group structure of different sectors/cells can allow the interference diversity that improves.
In one embodiment, except that bunch ID and/or segmentation ID, the channel assignment message can also comprise FH/CSS indication or sign, and one 1 bit indicator for example, its sign are used for a user of FH/CSS scheduling, one group of user and/or one group bunch.Under the situation that CSS assigns, the user rests on (a plurality of) bunch group of being assigned, till new assignment.Under the situation that FH assigns, the user for example in the mode of circulation, carries out frequency hopping according to predetermined frequency modulation pattern in bunch group of being assigned.In one embodiment, all interior on the same group mutually bunches are all assigned to be used for CSS scheduling or FH scheduling.
For at the example shown in Fig. 2, first group 202 can comprise first bunch 204 of first segmentation 206, first bunch 208 and the N of a K segmentation 210
sFirst bunch 212 of-1 segmentation 214.Second group 216 comprises the second bunch 224 of first segmentation 206, the second bunch 228 and N of a K+1 segmentation 230
sThe second bunch 232 of-1 segmentation 214.As indicated above, other group that can use bunch is arranged, and for example, can will bunch be grouped in together from the difference of different segmentations.
According to an embodiment, first can be organized 202 and be appointed as the group of being dispatched by CSS, this means will be assigned to the user of first group 202 be assigned to regularly in first group 202 bunch.This may be due to the fact that, and promptly this user is motion or slowly motion not, and marked change may not take place its channel quality in time.According to an embodiment, second group 216 can be appointed as the group of being dispatched by FH, this means user's (dynamically) that will be assigned to second group 216 be assigned in second group 216 bunch, make the user can in one group bunch that is assigned, carry out frequency hopping.This may be due to the fact that, and promptly this user is at rapid movement, and its channel quality may promptly change in time.
According to an embodiment, one group of user is assigned to the first group bunch 202.As discussed above, this assignment can be based on user's channel quality, and for example, user 1 may have the high channel quality in first segmentation 206, and user 2 may have the high channel quality in K segmentation 210, and user 3 may be at N
sHas the high channel quality in-1 segmentation 214.If user 1,2 and 3 all is scheduling to CSS,, user 1,2 and 3 can be assigned to regularly bunches 204,208 and 212 in first group 202 so respectively for example for having the motion or the slow user of motion.
According to an embodiment, the user was tasked the second group bunch 216 in 4,5 and 6 minutes.Yet, therefore if this user is the rapid movement user with rapid variation channel quality and/or speed, and be scheduled as FH, they dynamically can be assigned to bunches 224,228 and 232 in second group 216 so respectively.According to the predetermined or hopping scheme of configuration in real time, this user can be in second group 216 from a bunch of frequency hopping to another bunch.
In one embodiment, when user's mobility, Doppler effect or some further feature change, this user can be reassigned to different groups, perhaps can be to bunch dividing into groups again.In example above, if user 2 and 3 becomes rapid movement, and user 4 and 5 becomes not motion or slowly motion, user 1,4 and 5 can be assigned to regularly first group bunches 204,208 and 212 in 202 so respectively, and can with user 2,3 and 6 respectively in second group 216 (dynamically) assign between bunches 224,228 and 232, to carry out frequency hopping.It is contemplated that, H also operable different numbers group and/or bunch.
According to a bunch of assignment, the frequency spectrum between CSS and the FH user is cut apart and has been produced N
gIndividual bunch granularity.Therefore, N
gSelection be on the one hand at minimum diversity order (diversityorder) (N
g) and on the other hand at N
gIndividual bunch of (N
g* M
cIndividual tone) frequency spectrum is cut apart trading off between the granularity.In one embodiment, quite little N
gGuarantee satisfied channel diversity and cut apart granularity.For example and since be used for carrying out frequency hopping bunch number very little, so little group size allows low channel diversity.Yet big group size has been improved channel diversity, has increased granularity, when promptly each new user needs new one group bunch, needs to increase a large amount of tone (N
g* M
c), this may cause inefficient channel width to be used.
According to an embodiment, several bunches branch in several bunches group can be tasked a user.For a M bunch branch being tasked unique user by single assignment message, can use M (continuous) group, can identify accurate bunch in every group simultaneously by ID specified in the assignment message.In this case, can be to interweaving for corresponding bunch, to guarantee the frequency diversity in each channel in frequency with (continuous) group.
For the example packet shown in Fig. 2, a user can be assigned to first bunch 204 and second first bunch 224 of organizing in 216, i.e. M=2 in first group 202.If this user is scheduling to CSS, the visible diversity order of this user is 2 so,, this user is assigned to M=2 bunch 204,224 regularly that is.Yet if this user is scheduling to FH, the visible diversity order of this user is 6 so, and promptly the user can be at every group of N of M=2 group
gCarry out frequency hopping between=3 bunches.Because this M=2 and N
g=3 selection, FH provides acceptable interference diversity.
Now, consider the user is assigned to the situation of first bunch in the M=4 group bunch.If this user is scheduling to CSS, the visible diversity order of this user is M=4 so, and if this user is scheduling to FH, the visible diversity order of this user is 12 so.Therefore, because M=4 and N
g=3 selection, CSS or FH can provide satisfied interference diversity.In one embodiment, as M＜N
gThe time, the user of rapid movement can be scheduling to the FH pattern, and as M 〉=N
gThe time, the user of rapid movement can be scheduling to CSS or FH pattern.
Fig. 3 shows access point 110x and the block diagram of the 120x that accesses terminal, and it is used to realize above cutting apart and distributing in conjunction with the frequency spectrum flexibly that Fig. 1 and Fig. 2 discussed.For reverse link, at terminal 120x place, send (TX) data processor 314 and receive business datum from data buffer 312, based on selected coding and modulation scheme each packet (is for example handled, encode, interweave and sign map), and data symbol is provided.Data symbol is a modulation symbols for data, and frequency pilot sign is the modulation symbol (it is known in advance) of pilot tone.316 pairs of data symbols of modulator, frequency pilot sign and the possible signaling that is used for reverse link receive, and carry out OFDM modulation and/or other processing as system is specified, and the output code laminar flow is provided.318 pairs of output code laminar flows of transmitter unit (TMTR) are handled (for example, transforming to simulation, filtering, amplification and up-conversion), and generate modulated signal, and this modulated signal is sent from antenna 320.
At access point 110x place, the modulated signal that the terminal that is communicated by terminal 120x and other and access point 110x by 352 pairs on antenna sends receives.354 pairs of signals that receive from antenna 352 of receiver unit (RCVR) are handled (for example, regulating and digitlization), and the sampling that receives is provided.(for example, separate to be in harmonious proportion and detect) handled in 356 pairs of samplings that receive of demodulator (Demod), and detected data symbol is provided, and this detected data symbol is the noisy estimation to the data symbol that is sent to access point 110x by terminal.Receive 358 pairs of detected data symbols of (RX) data processor and handle (for example, symbol de-maps, deinterleaving and decoding), and the decoded data at that terminal are provided at each terminal.
For forward link, at access point 110x place, handle, to produce data symbol by 360 pairs of business datums of TX data processor.Modulator 362 pairs of data symbols, frequency pilot signs and the signaling that is used for forward link receive, carry out OFDM modulation and/or other relevant processing, and provide the output code laminar flow, further regulate by 364 pairs of these output code laminar flows of transmitter unit, and it is sent from antenna 352.The forward link signaling can comprise that by controller 370 be all power control commands that send to the terminal generation of base station 110x on reverse link.At terminal 120x place, receive by the modulated signals that base station 110x sends by 320 pairs on antenna, by receiver unit 322 adjusted and digitlizations, and it is handled, to obtain detected data symbol by demodulator 324.326 pairs of detected data symbols of RX data processor are handled, and decoded data and forward link signaling at terminal are provided.330 pairs of power control commands of controller receive, and logarithm reportedly is input into row control, and power control command transmitting are delivered to access point 110x on reverse link.Controller 330 and 370 is commanded the operation of terminal 120x and access point 110x respectively.Memory cell 332 and 372 is stored respectively by controller 330 and 370 employed program code and data, so that as discussed above realize that frequency spectrum is cut apart and/or distributed flexibly like that.
The disclosed embodiments can be applied to any of following technology or its combination: code division multiple access (CDMA) system, CDMA multiple carrier (MC-CDMA), wideband CDMA (W-CDMA), high-speed downlink packet insert (HSDPA), time division multiple access (TDMA) system, frequency division multiple access (FDMA) system and OFDM (OFDMA) system.
Can be implemented in signaling transmission technology described herein by variety of way.For example, can make up these technology that realizes with hardware, software or its.Realize for hardware, can be at one or more application-specific integrated circuit (ASIC)s (ASIC), digital signal processor (DSP), digital signal processor spare (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor, other is designed to realize to realize in the electronic unit of function as described herein or its combination to be used for signaling is handled the processing unit of (for example, compression and encode).Can also be used for processing unit that signaling is decoded and decompressed with realizations such as one or more ASIC, DSP.
Realize for software, can realize the signaling transmission technology with the module (for example, process, function etc.) of carrying out function as described herein.Software code can be stored in the memory cell (for example, the memory cell 332 or 372 among Fig. 3), and carry out this software code by processor (for example, controller 330 or 370).Can be in processor inside or the outside memory cell that realizes of processor.
Provide the above-mentioned explanation of disclosed embodiment, so that make any technical staff of this area can both realize or use the present invention.The various modifications of these embodiment will be conspicuous to one skilled in the art, and under the situation that does not break away from the spirit or scope of the present invention, the General Principle that defines can be applied to other embodiment here.Therefore, the present invention is not the embodiment shown in will being restricted to here, but will meet and principle disclosed herein and the corresponding to wide region of novel feature.
Claims (36)
1. method that is used for spectrum allocation may is given a plurality of users, described frequency spectrum has the segmentation of first number, each segmentation have second number that is associated with certain sectors/cells bunch, described method comprises:
First bunch of frequency sub-carrier branch in first segmentation tasked first user in first sectors/cells; And
Second bunch of frequency sub-carrier branch in second segmentation tasked second user in second sectors/cells, make described first bunch different frequency sub-carrier dispatched modes to be arranged with described second cocooning tool.
2. the method for claim 1, wherein bunch branch in the segmentation is tasked that channel quality that the user is based on this user carries out.
3. the method for claim 1, wherein described frequency spectrum comprises the shared bandwidth of distributing to a plurality of users in the ofdma communication system.
4. method that is used for spectrum allocation may is given a plurality of users, described frequency spectrum has the segmentation of first number, each segmentation have second number that is associated with certain sectors/cells bunch, described method comprises:
It is each the assignment cluster frequency sub-carrier among a plurality of users in first sectors/cells; And
It is each the assignment cluster frequency sub-carrier among a plurality of users in second sectors/cells, make for each bunch that branch is tasked the described user in described second sectors/cells, divide each cocooning tool of tasking the described user in described first sectors/cells that different frequency sub-carrier dispatched modes is arranged.
5. method as claimed in claim 4, wherein, some described cocooning tool has the subcarrier dispatched mode of interruption at least.
6. one kind is used for frequency spectrum is cut apart to distribute to a plurality of users' method, comprising:
Frequency spectrum is divided into the segmentation of first number, and each segmentation has the frequency sub-carrier of second number; And
The frequency sub-carrier of the 3rd number of each segmentation is divided into the 4th number that is associated with a sectors/cells bunch, make the described cocooning tool of the 5th number that nonoverlapping frequency sub-carrier dispatched mode be arranged, wherein, described the 3rd number is equal to or less than described second number, and described the 5th number is equal to or less than described the 4th number.
7. method as claimed in claim 6, wherein, with respect to be associated with second sectors/cells bunch in each for, each in be associated with first sectors/cells described bunch has different frequency sub-carrier dispatched modes.
8. method as claimed in claim 6, wherein, each in be associated with first sectors/cells described bunch is different from each in described bunch that is associated with second sectors/cells in an identical manner.
9. method as claimed in claim 6, wherein, some described cocooning tool has the sub-carrier frequencies dispatched mode of interruption at least.
10. method that is used for flexible spectrum is distributed to a plurality of users, described frequency spectrum has the segmentation of first number, each segmentation have second number that is associated with certain sector bunch, described method comprises:
The first group of bunch of branch of frequency sub-carrier tasked first group of user, and this first group of user is fixed and is assigned to described first group bunch; And
The second group of bunch of branch of frequency sub-carrier tasked second group of user, and this second group of user carries out frequency hopping in described second group bunch.
11. method as claimed in claim 10 wherein, is come identifying user by sign, described user's scheduling is used for fixing assignment in this sign indication or frequency hopping is assigned.
12. method as claimed in claim 10, wherein, by identifying one group bunch, this sign indication is used for fixing described one group of bunch of scheduling and assigns still frequency hopping assignment.
13. method as claimed in claim 10, also comprise: when at least one feature of user changes, this user is reassigned to described second group of user from described first group of user, perhaps this user is reassigned to described first group of user from described second group of user.
14. method as claimed in claim 13, wherein, described feature comprises mobility.
15. method as claimed in claim 10, wherein, in described first and second groups bunches each divided again tasks one group of different users, make described first group of user in described first group bunch, carry out frequency hopping and described second group of user rest on that they are assigned separately in described second group bunch bunch on.
16. a method that is used for flexible spectrum is distributed to a plurality of users, described frequency spectrum has the segmentation of first number, and each segmentation has the frequency sub-carrier bunch of second number that is associated with certain sectors/cells, and described method comprises:
With bunch dividing into groups of the segmentation of described first number; And
Be that a user assigns at least one bunch in each group.
17. method as claimed in claim 16, wherein, when described second number during less than described first number, with described user be scheduling to described first number bunch between carry out frequency hopping.
18. method as claimed in claim 16, wherein, when described second number during less than described first number, with described user be scheduling to described first number bunch between carry out frequency hopping or fixed dwell described assigned bunch on.
19. a device that is used for spectrum allocation may is given a plurality of users, described frequency spectrum has the segmentation of first number, each segmentation have second number that is associated with certain sectors/cells bunch, described device comprises:
Be used for first bunch of frequency sub-carrier branch in first segmentation tasked first user's of first sectors/cells module; And
Be used for second bunch of frequency sub-carrier branch in second segmentation tasked second user's of second sectors/cells module, make described first bunch different frequency sub-carrier dispatched modes to be arranged with described second cocooning tool.
20. device as claimed in claim 19 wherein, is tasked bunch branch in the segmentation that channel quality that the user is based on this user carries out.
21. device as claimed in claim 19, wherein, described frequency spectrum comprises the shared bandwidth of distributing to a plurality of users in the ofdma communication system.
22. a device that is used for spectrum allocation may is given a plurality of users, described frequency spectrum has the segmentation of first number, each segmentation have second number that is associated with certain sectors/cells bunch, described device comprises:
Be used to the module of each the assignment cluster frequency sub-carrier among a plurality of users in first sectors/cells; And
Be used to the module of each the assignment cluster frequency sub-carrier among a plurality of users in second sectors/cells, make for each bunch that branch is tasked the described user in described second sectors/cells, divide each cocooning tool of tasking the described user in described first sectors/cells that different frequency sub-carrier dispatched modes is arranged.
23. device as claimed in claim 22, wherein, some described cocooning tool has the subcarrier dispatched mode of interruption at least.
24. one kind is used for frequency spectrum is cut apart to distribute to a plurality of users' device, comprises:
Be used for frequency spectrum is divided into the module of the segmentation of first number, each segmentation has the frequency sub-carrier of second number; And
Be used for frequency sub-carrier with the 3rd number of each segmentation be divided into the 4th number that is associated with a sectors/cells bunch module, make the described cocooning tool of the 5th number that nonoverlapping frequency sub-carrier dispatched mode be arranged, wherein, described the 3rd number is equal to or less than described second number, and described the 5th number is equal to or less than described the 4th number.
25. device as claimed in claim 24, wherein, with respect to be associated with second sectors/cells bunch in each for, each in be associated with first sectors/cells described bunch has different frequency sub-carrier dispatched modes.
26. device as claimed in claim 24, wherein, each in be associated with first sectors/cells described bunch is different from each in described bunch that is associated with second sectors/cells in an identical manner.
27. device as claimed in claim 24, wherein, some described cocooning tool has the sub-carrier frequencies dispatched mode of interruption at least.
28. a device that is used for flexible spectrum is distributed to a plurality of users, described frequency spectrum has the segmentation of first number, each segmentation have second number that is associated with certain sector bunch, described device comprises:
Be used for the first group of bunch of branch of frequency sub-carrier tasked first group of user's module, described first group of user is fixed and is assigned to described first group bunch; And
Be used for the second group of bunch of branch of frequency sub-carrier tasked second group of user's module, described second group of user carries out frequency hopping in described second group bunch.
29. device as claimed in claim 28 also comprises being used to indicate described user's scheduling is used for fixing the module that assignment still is the frequency hopping assignment.
30. device as claimed in claim 28 also comprises being used to indicate one group of bunch of scheduling is used for fixing the module that assignment still is the frequency hopping assignment.
31. device as claimed in claim 28, also comprise and being used for when at least one feature of user changes, this user is reassigned to described second group of user from described first group of user, perhaps this user is reassigned to described first group of user's module from described second group of user.
32. device as claimed in claim 31, wherein, described feature comprises mobility.
33. device as claimed in claim 28, also comprise being used for dividing the module of tasking one group of different users again with described first and second groups bunches each, make described first group of user in described first group bunch, carry out frequency hopping and described second group of user rest on that they are assigned separately in described second group bunch bunch on.
34. a device that is used for flexible spectrum is distributed to a plurality of users, described frequency spectrum has the segmentation of first number, and each segmentation has the frequency sub-carrier bunch of second number that is associated with certain sectors/cells, and described device comprises:
Be used for bunch module of dividing into groups with the segmentation of described first number; And
Be used to a user to assign the module of at least one bunch in each group.
35. device as claimed in claim 34 also comprises being used for when described second number during less than described first number, with described user be scheduling to described first number bunch between carry out the module of frequency hopping.
36. device as claimed in claim 34 also comprises being used for when described second number during less than described first number, with described user be scheduling to described first number bunch between carry out frequency hopping or fixed dwell described assigned bunch on module.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US55489904P | 2004-03-19 | 2004-03-19 | |
| US60/554,899 | 2004-03-19 | ||
| US11/022,514 US7706350B2 (en) | 2004-03-19 | 2004-12-22 | Methods and apparatus for flexible spectrum allocation in communication systems |
| US11/022,514 | 2004-12-22 | ||
| PCT/US2005/007046 WO2005096538A1 (en) | 2004-03-19 | 2005-03-03 | Methods and apparatus for flexible spectrum allocation in communication systems |
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| CN1954534A CN1954534A (en) | 2007-04-25 |
| CN1954534B true CN1954534B (en) | 2010-12-22 |
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| WO2009008787A1 (en) * | 2007-07-06 | 2009-01-15 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and arrangements for communication of channel quality information in a telecommunications system |
| US8699426B2 (en) | 2008-03-26 | 2014-04-15 | Qualcomm Incorporated | Method and apparatus for resource allocation in wireless communication systems |
| CN101646217B (en) * | 2009-06-05 | 2012-08-08 | 华为技术有限公司 | Method and device for controlling district bounce frequency group state as well as base station controller |
| CN102480734B (en) * | 2010-11-22 | 2014-04-30 | 中兴通讯股份有限公司 | Time-frequency resource distributing method and device |
| WO2013046636A1 (en) * | 2011-09-26 | 2013-04-04 | 日本電信電話株式会社 | Communication system, transmitter apparatus and receiver apparatus |
| CN111800738B (en) * | 2020-07-13 | 2021-10-12 | 深圳大学 | Method and system for sharing millimeter wave mobile base station online frequency spectrum based on clustering algorithm |
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| WO1998016029A2 (en) * | 1996-10-10 | 1998-04-16 | Ericsson, Inc. | Method for improving co-channel interference in a cellular system |
| US6047186A (en) * | 1997-10-06 | 2000-04-04 | Nortel Networks Corporation | Method and system for solving cellular communications frequency planning problem |
| WO2002049306A2 (en) * | 2000-12-15 | 2002-06-20 | Broadstorm Telecommunications, Inc. | Multi-carrier communications with group-based subcarrier allocation |
| WO2004004269A1 (en) * | 2002-06-27 | 2004-01-08 | Nortel Networks Limited | Dual-mode shared ofdm methods/transmitters, receivers and systems |
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| RU2099886C1 (en) * | 1994-06-29 | 1997-12-20 | Военная академия связи | Method of information transmission in radio line with pseudorandom re-tuning of operating frequencies and device for its realization |
| DE19800953C1 (en) * | 1998-01-13 | 1999-07-29 | Siemens Ag | Resource allocation in radio interface of radio communications system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998016029A2 (en) * | 1996-10-10 | 1998-04-16 | Ericsson, Inc. | Method for improving co-channel interference in a cellular system |
| US6047186A (en) * | 1997-10-06 | 2000-04-04 | Nortel Networks Corporation | Method and system for solving cellular communications frequency planning problem |
| WO2002049306A2 (en) * | 2000-12-15 | 2002-06-20 | Broadstorm Telecommunications, Inc. | Multi-carrier communications with group-based subcarrier allocation |
| WO2004004269A1 (en) * | 2002-06-27 | 2004-01-08 | Nortel Networks Limited | Dual-mode shared ofdm methods/transmitters, receivers and systems |
Non-Patent Citations (1)
| Title |
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| WO 2004004269 A1,第2页6行-第3页4行，第21页18行-23页20行，第24页1行-26页20行，第31页15行-28行. |
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| CN1954534A (en) | 2007-04-25 |
| RU2009146586A (en) | 2011-06-20 |
| ZA200608196B (en) | 2008-05-28 |
| RU2541112C2 (en) | 2015-02-10 |
| UA92717C2 (en) | 2010-12-10 |
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