CN100563143C - A kind of pilot frequency mapping method and wireless communication system - Google Patents
A kind of pilot frequency mapping method and wireless communication system Download PDFInfo
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- CN100563143C CN100563143C CNB2006100014809A CN200610001480A CN100563143C CN 100563143 C CN100563143 C CN 100563143C CN B2006100014809 A CNB2006100014809 A CN B2006100014809A CN 200610001480 A CN200610001480 A CN 200610001480A CN 100563143 C CN100563143 C CN 100563143C
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Abstract
The invention discloses a kind of pilot frequency mapping method, this method comprises: for the special-purpose pectination frequency spectrum of road pilot frequency distribution; The user of transmission data is mapped to pilot tone described on the frequency band corresponding with this user data in the special-purpose pectination frequency spectrum with the road pilot frequency distribution, as transmitting with the road pilot tone of this user.The invention also discloses a kind of wireless communication system.Among the present invention, by being the pectination frequency spectrum with road pilot frequency distribution special use, the user of transmission data is mapped in pilot tone on this special use pectination frequency spectrum, therefore can not influence each other with between the density of road pilot tone and the quantity of transmitting the data user, does not have restricting relation; In addition, because the user of transmission data does not take the frequency spectrum resource outside the above-mentioned special-purpose pectination frequency spectrum among the present invention when sending with the road pilot tone, and measurement pilot frequency is not subjected to the influence with the road pilot density among the present invention, so system carries out the branch timing of measurement pilot frequency in the residual spectrum resource, be not subjected to the restriction with the road pilot tone.
Description
Technical field
The present invention relates to communication system information transmission technology field, be meant a kind of pilot frequency mapping method and a kind of wireless communication system especially.
Background technology
Single-carrier frequency division multiple access inserts (SC-FDMA) technology, is a kind of emerging technology with the equal power ratio of ebb (PAPR) characteristic, can guarantee orthogonality and the effective frequency domain equalization of receiver side between the user.
Be illustrated in figure 1 as the major technique schematic diagram that single-carrier frequency division multiple access inserts, wherein, at first with the process Fourier transform of the time-domain signal shown in 101 (DFT) 102, transform to frequency domain, through subcarrier mapping (Sub-carrier Mapping) 103, frequency-region signal is mapped to corresponding subcarrier at frequency domain, is transformed into time domain by inverse-Fourier transform (IFFT) conversion 104 again, then 105, send after time-domain signal added cyclic prefix CP.
On up direction, above-mentioned subcarrier mapping step has determined the frequency band that the user is shared, as shown in Figure 2, for subcarrier mapping schematic diagram, if the sample point of DFT output is mapped on the continuous sub-carriers, shown in Fig. 2 a, is called localized transmission; If the sample point of DFT output is mapped on the equally spaced pectination subcarrier, shown in Fig. 2 b, be called distributed transmission.
In order to guarantee the single-carrier property of up low peak average ratio, common reference signal (or being called pilot tone) and data division time division multiplexing.The structure of typical upward line time transmission unit as shown in Figure 3, two symbols in time transmission unit are used for transmission of reference signals, promptly as pilot tone, are used to carry out coherent demodulation and/or control/transfer of data, all the other symbols are used for control/transfer of data, and CP is a Cyclic Prefix.After having used the SC-FDMA technology, be used in the last line time transmission unit as the symbol of pilot tone through the subcarrier mapping after, can take continuous frequency spectrum and also can take the pectination frequency spectrum.
Above-mentioned pilot tone can be used to up coherent demodulation or coherent detection to make channel estimating, and the pilot tone of this purposes is called with the road pilot tone, send in same frame with road pilot tone and data, and the frequency band correspondence; Also can be used to up time domain, frequency domain or time-frequency domain scheduling to make channel quality prediction, the pilot tone of this purposes is called measurement pilot frequency, and two kinds of pilot tones can overlap, and also can not overlap.Carry out in the system of frequency domain dispatching in the broad frequency band at needs, for the pilot resources that takies the pectination frequency spectrum, system distributes different frequency to be offset the Comb Pilot of (offset) for the user that each sends data, be used for carrying out coherent demodulation and wideband channel quality prediction simultaneously, in order to keep single-carrier property, this Comb Pilot needs to distribute on full range.And for the user who does not send data, be non-transmission data user, in order to carry out the wideband channel quality prediction, can only remove in frequency pilot sign on the resource outside the Comb Pilot that the user into the transmission data distributes, be that the user distributes frequency spectrum that pilot signal is mapped on it as measurement pilot frequency by system according to user's priority.
In addition, the outer pilot resources of the Comb Pilot of distributing for the user of transmitting data in the pilot resources also can be as other information of transmission, as control information.
Further specify above-mentioned pilot frequency mapping method of the prior art with as shown in Figure 4 each CU frequency spectrum resource situation as example.Among Fig. 4, transverse axis is a time domain, the position of corresponding time-domain symbol (Symbol), vertical pivot is a frequency domain, and supposing the system is the pilot tone pectination frequency spectrum 401 that the user 0 of transmission data has distributed offset=0, and the shared frequency spectrum of this user data is 402, then corresponding with this user data 402 4010,4011 as with the road pilot tone, and 401 integral body are as measurement pilot frequency, and pilot tone on other frequency bands 4012,4013,4014 etc. wherein is used for carrying out other are not had the channel quality detection of the frequency band of transfer of data; Similarly, supposing the system has distributed the pilot tone pectination frequency spectrum 411 of offset=1 for the user 1 of transmission data, the shared frequency spectrum of this user data is 412, then corresponding with this user data 412 4112,4113 as with the road pilot tone, and 411 integral body are as measurement pilot frequency, and wherein pilot tone on other frequency bands 4110,4111,4114,4115 etc. is used for carrying out other are not had the channel quality detection of the frequency band of transfer of data; The situation of the CU pilot resources of other transmission data and above-mentioned user class are seemingly.Supposing currently has three users sending data, taken offset respectively and be 0,1 and 2 pilot resources, then residue can have only the Comb Pilot 431 of offset=3 for other users as the resource of measurement pilot frequency, so, take resource on 431 by system assignment for the user of not transmitting data.
In the above-mentioned prior art, because in the subcarrier mapping process, the pilot tone of transmitting the user of data is mapped on the Comb Pilot that takies full range in the pilot resources, if the density requirements with the road pilot tone is too high, cause number of users quantitative limitation, for example to the transmission data, in Fig. 4, if the density requirements with the road pilot tone doubles again, promptly need to take 1/2 pilot resources, the user of then transmitting data in the system simultaneously can only have two at most; In addition, because system is not fixing with the road pilot tone that the transmission data user distributes, the running time-frequency resource that system distributes measurement pilot frequency or branch to be used in other information of transmission on the frequency spectrum resource outside the pilot tone of road just has been subjected to the restriction with the road pilot tone.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of pilot frequency mapping method and a kind of wireless communication system, reduces with the mutual restriction between road pilot density and current transmission data user's the quantity.
For achieving the above object, the invention provides a kind of pilot frequency mapping method, this method comprises:
A, be with the special-purpose pectination frequency spectrum of road pilot frequency distribution, described for comprising with the special-purpose pectination frequency spectrum of road pilot frequency distribution: in predefined mode for the special-purpose pectination frequency spectrum of road pilot frequency distribution; Or by system according to be with the frequency domain resource density of road pilot tone needs with the special-purpose pectination frequency spectrum of road pilot frequency distribution, and the spectrum information of distribution is handed down to the user;
Described special-purpose pectination frequency spectrum accounts for the 1/N of continuous pilot subcarrier, and wherein N is the positive integer greater than 1;
Describedly be used to the pilot tone that up coherent demodulation or coherent detection are made channel estimating with the road pilot tone;
The user of B, transmission data is mapped to pilot tone described on the frequency band corresponding with this user's data in the special-purpose pectination frequency spectrum with the road pilot frequency distribution, as transmitting with the road pilot tone of this user.
This method may further include: the user that partly or entirely distributes in system's residual spectrum that special-purpose pectination frequency spectrum described in the pilot resources is outer is used for the transmission measurement pilot tone, or all distributes to the user and be used to transmit other outer information of pilot tone.
Preferably, the user of described transmission data only is mapped to pilot tone transmitting with the road pilot tone as this user on the described frequency band corresponding with this user data when carrying out transfer of data current.
Preferably, the part or all of spectrum allocation may in the described residual spectrum being used for the transmission measurement pilot tone to the user is:
At least 1 pectination spectrum allocation may in a plurality of pectination frequency spectrums of described residual spectrum is used for the transmission measurement pilot tone to the user;
Perhaps described residual spectrum is further resolved into the more sparse pectination frequency spectrum of a plurality of broach, and wherein at least 1 pectination spectrum allocation may is used for the transmission measurement pilot tone to the user.
Preferably, described for being with the special-purpose pectination frequency spectrum of road pilot frequency distribution: for user in the sub-district with the special-purpose pectination frequency spectrum of road pilot frequency distribution; System is that the described special-purpose pectination spectrum position of different districts distribution is identical or different.
The described described special-purpose pectination spectrum position that distributes for different districts is not all:
Described special-purpose pectination spectrum position difference for neighbor cell allocation.
Preferably, be assigned with frequency spectrum and be used for the user of the user of transmission measurement pilot tone for current non-transmission data, the time domain that the user of described non-transmission data is provided with for this user according to predefined time domain and/or frequency domain rule or system and/or the rule of frequency domain are mapped to pilot tone on the frequency spectrum for this user's distribution to be transmitted as measurement pilot frequency.
After the user of described transmission data finished transfer of data, if the channel condition information of all or part of frequency band that this user's measurement pilot frequency provides is still effective, then system dispatched this user.
If the user of described transmission data is when carrying out transfer of data, it has taken place to conflict then with the road pilot tone and the set transmission rule of measurement pilot frequency that this user of current time only sends with the road pilot tone, stops to send measurement pilot frequency, and the transmission rule of original measurement pilot frequency lost efficacy; After finishing transfer of data, the channel condition information that system determines this user's measurement pilot frequency to be provided lost efficacy, or the user participates in not being scheduled for after the scheduling of transfer of data, then system distributes the spectrum position of measurement pilot frequency according to user's priority for the user, and the spectrum position information of the measurement pilot frequency that will distribute for this user sends to the user; The user is according to the positional information transmission measurement pilot tone of the measurement pilot frequency that receives then.
Can further carry out during described user's transmission measurement pilot tone according to the time domain and/or the frequency domain rule of predefined transmission measurement pilot frequency.
When described system distributes the spectrum position of measurement pilot frequency according to user's priority for the user, may further include:, and will send to the user for time domain and/or the frequency domain rule that the user determines for the user determines to send the time domain and/or the frequency domain rule of measurement pilot frequency;
Described user is during according to the spectrum position message transmission measurement pilot frequency of the measurement pilot frequency of distributing, and may further include: the user carries out the transmission of measurement pilot frequency according to time domain and/or frequency domain rule that system sends.
When comprising the symbol of an above transmission of reference signals in the last line time transmission unit of system, have at least the symbol of a transmission of reference signals to adopt described method to shine upon in this time transmission unit.
This method may further include:
System preestablishes the time transmission unit that the user who is used to the set transmission rule with road pilot tone and measurement pilot frequency to clash sends measurement pilot frequency;
System distributes to the described user who clashes with the set transmission rule of road pilot tone and measurement pilot frequency with pilot resources, and will send to the user for the measurement pilot frequency resource information that the user distributes being described time transmission unit when distributing the measurement pilot frequency resource;
The user is mapped to pilot signal according to the measurement pilot frequency information that receives on the pilot resources of described time transmission unit transmits as this user's measurement pilot frequency.
The described user who clashes with the set transmission rule of road pilot tone and measurement pilot frequency is: when the measurement pilot frequency resource of the described time transmission unit of system assignment, system clashes the user that the back does not have to distribute for it measurement pilot frequency resource at it with road pilot tone and measurement pilot frequency.
Preferably, system is described time transmission unit when distributing the measurement pilot frequency resource, is that described user distributes the measurement pilot frequency resource according to described user's priority.
The transmission means of the measurement pilot frequency in the described time transmission unit is pectination spectrum frequency division form or sign indicating number branch form.
Preferably, described time transmission unit periodically is provided with.
Second aspect for achieving the above object the invention provides a kind of wireless communication system, and this system comprises:
The base station be used to the special-purpose pectination frequency spectrum of road pilot frequency distribution, and the special-purpose pectination spectrum information that will distribute sends to user terminal;
User terminal, be used for according to special-purpose pectination spectrum information from the base station, pilot tone is mapped to on the corresponding frequency band of user's data corresponding with this user terminal in the special-purpose pectination frequency spectrum with the road pilot frequency distribution, as transmitting of the user of this user terminal correspondence with the road pilot tone;
Described special-purpose pectination frequency spectrum accounts for the 1/N of continuous pilot subcarrier, and wherein N is the positive integer greater than 1;
Describedly be used to the pilot tone that up coherent demodulation or coherent detection are made channel estimating with the road pilot tone.
Preferably, comprise in the described base station:
Resource distribution module be used to the special-purpose pectination frequency spectrum of road pilot frequency distribution, and the special-purpose pectination spectrum information that will distribute sends to sending module;
Sending module is used for the information from resource distribution module is sent to corresponding user terminal.
Preferably, the user that partly or entirely distributes to that described resource distribution module is further used in the residual spectrum that special-purpose pectination frequency spectrum described in the pilot resources is outer is used for the transmission measurement pilot tone, or all distribute to the user and be used to transmit other outer information of pilot tone, and will send to sending module for the spectrum position information that the user distributes;
Described user terminal is further used for according to the spectrum position information that receives the signal map of correspondence being transmitted to corresponding frequency spectrum resource.
By such scheme as can be seen, among the present invention, by for to compose again and again with the pectination of road pilot frequency distribution special use, the user of transmission data is mapped in pilot tone on this special use pectination frequency spectrum, therefore can not influence each other with between the density of road pilot tone and the quantity of transmitting the data user, not have restricting relation; In addition, because the user of transmission data does not take the frequency spectrum resource outside the above-mentioned special-purpose pectination frequency spectrum among the present invention when sending with the road pilot tone, and measurement pilot frequency is not subjected to the influence with the road pilot density among the present invention, so system carries out the branch timing of measurement pilot frequency in the residual spectrum resource, be not subjected to the restriction with the road pilot tone;
In addition, by periodically time transmission unit is set,, and can support more user's transmission measurement information among the present invention for measurement pilot frequency and the user that clashes with the road pilot tone provide the resource of measuring.
Description of drawings
The major technique schematic diagram that Fig. 1 inserts for single-carrier frequency division multiple access;
Fig. 2 is subcarrier mapping schematic diagram;
Fig. 3 is the structure chart of the last line time transmission unit of LTE;
Fig. 4 is the schematic diagram of an example of each CU frequency spectrum resource in the prior art;
Fig. 5 is the schematic diagram of an example of each CU frequency spectrum resource among the present invention;
Fig. 6 is the schematic diagram of another example of each CU frequency spectrum resource among the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Main thought of the present invention is, for the special-purpose pectination frequency spectrum of road pilot frequency distribution; When carrying out the subcarrier mapping, the user of transmission data is mapped to pilot tone described on the frequency band corresponding with this user data in the special-purpose pectination frequency spectrum with the road pilot frequency distribution, as transmitting with the road pilot tone of this user.
Be method with the special-purpose pectination frequency spectrum of road pilot frequency distribution, it can be the fixing pectination frequency spectrum that is provided with according to the frequency domain resource density of carrying out the coherent detection needs with the road pilot tone in advance, this special use pectination frequency spectrum can be that system and user consult in advance, also can be to distribute with the frequency domain resource density of road pilot tone needs, and the spectrum information that distributes is handed down to the user of transmission data by system's basis.The user is mapped to pilot signal on the frequency band corresponding with this user data in the corresponding described special-purpose pectination frequency spectrum, as transmitting with the road pilot tone of this user according to described special-purpose pectination spectrum information.
The difference of these two kinds of methods is, preceding a kind of be that receiving-transmitting sides pre-determines, do not need system with extra signaling user, save signal resource; Then a kind of system can be at any time according to the different changes of resource situation with channel condition etc.System is being during with the special-purpose pectination frequency spectrum of road pilot frequency distribution, can the identical or different special-purpose pectination frequency spectrum of distribution locations for different sub-districts, for neighbor cell, can for the different special-purpose pectination frequency spectrum of its distribution locations to reduce in each sub-district with the interference between the pilot tone of road.Here the special-purpose pectination frequency spectrum of Fen Peiing can be, system resolves into continuous pilot sub-carrier two pectination frequency spectrums that respectively account for 1/2 resource, then two pectination frequency spectrums are respectively the pectination frequency spectrum of offset=0 and offset=1, get one of them pectination frequency spectrum then as with the special-purpose pectination frequency spectrum of road pilot tone; Certainly system also continuous pilot sub-carrier can be distributed into and respectively account for 1/3, the pectination frequency spectrum of 1/4......, get one of them pectination frequency spectrum then as special-purpose pectination frequency spectrum with the road pilot tone, promptly take the 1/N of continuous pilot subcarrier with the special-purpose pectination frequency spectrum of road pilot tone, wherein N is the positive integer greater than 1.The user of transmission data is a special-purpose pectination frequency spectrum with the road pilot frequency distribution according to system, the pilot tone of self is mapped on the frequency band corresponding with the shared frequency band of this user data in the above-mentioned special-purpose pectination frequency spectrum, as transmitting with the road pilot tone of this user in the mode of frequency division.
When system by the signaling user when being the frequency ranges of data information of its distribution, the user is mapped on the frequency band corresponding with this user's data in the above-mentioned special-purpose pectination frequency spectrum as transmitting with the road pilot tone according to the information of the above-mentioned special-purpose pectination frequency spectrum pilot tone with self.If system changes for special-purpose pectination spectral density or the positional information with the road pilot frequency distribution, the information that changes is handed down to the user.
Among the present invention, after the above-mentioned special-purpose pectination frequency spectrum of the CU of transmission data sends with the road pilot tone, just no longer take the remaining pilot resources of current time and sent measurement pilot frequency.
The present invention is further described as example below by situation that each CU frequency spectrum resource shown in Figure 5 distributes.The pectination frequency spectrum 501 that to be assumed to be the special-purpose pectination frequency spectrum with the road pilot frequency distribution be offset=0, all the other offset=1,2 and 3 pectination frequency spectrum 502,503,504 are used to distribute to other users as measurement pilot frequency or make other purposes.Then in 501, the part corresponding with user 0 frequency ranges of data 511 comprises 5010,5011, by user 0 with its pilot tone mapping thereon as user 0 with the road pilot tone; And corresponding with user 1 frequency ranges of data 512 5012 and 5013, then by user 1 with its pilot tone be mapped on it as user 1 with the road pilot tone; Corresponding with user 2 frequency ranges of data 513 5014,5015 and 5016 etc., then by user 2 with its pilot tone be mapped on it as user 2 with the road pilot tone.
Take 1/4 pilot resources with the road pilot tone in the example shown in Figure 5, if increase density among the present invention with the road pilot tone, take 1/2 pilot resources as increasing to the density of road pilot tone, then be that whole pilot resources is divided into two pectination frequency spectrums, for example in Fig. 6, continuous pilot sub-carrier among the 6a is resolved into the offset=0 shown in Fig. 6 b and Fig. 6 c that respectively accounts for 1/2 frequency resource and the pectination frequency spectrum of offset=1, wherein the pectination frequency spectrum shown in Fig. 6 b is used for conduct with the road pilot tone, the pilot resources that transmits data and can take different frequency bands with higher density greater than two user then still can be arranged as with the road pilot tone, even therefore the density with the road pilot tone increases, can not have influence on the number of users of transmission data yet.
For being with the outer residue pilot resources of the special-purpose pectination frequency spectrum of road pilot frequency distribution, system can distribute to non-current transmission data user and is used for the transmission measurement pilot tone some or all of; Residual resource with other outer information of transmission pilot tone, as control information transmission, or is transmitted data etc. as other purposes.For example, comprise three pectination frequency spectrums in the residue pilot resources, system can all distribute to it user of different non-current transmission data as measurement pilot frequency, also can be with one of them or two users that distribute to different non-current transmission data as measurement pilot frequency, another distributes as other purposes, these three pectination frequency spectrums all can also be divided to be used in control information transmission.
System can directly distribute the residue pilot resources or further resolve into the more sparse pectination frequency spectrum that accounts for full range of a plurality of broach and distribute.For example, the residue pilot resources comprises 2 pectination frequency spectrums, and then system can each resolves into two pectination frequency spectrums with these two pectination frequency spectrums, also one of them can be resolved into the pectination frequency spectrum and another does not decompose, thereby forms more pectination frequency spectrum.Non-current transmission data user can determine the pectination frequency spectrum that this user's measurement pilot frequency is shared according to priority by system, or the partial-band in the pectination frequency spectrum, this user is mapped in the above-mentioned residue pilot resources on its corresponding frequency spectrum resource measurement pilot frequency as this user with self pilot signal then.
For example in Fig. 6, the continuous pilot sub-carrier shown in the 6a can resolve into the offset=0 shown in Fig. 6 b that respectively accounts for 1/2 frequency resource and the pectination frequency spectrum of the offset=1 shown in Fig. 6 c.Suppose that the pectination frequency spectrum shown in Fig. 6 b is that system is the special-purpose frequency spectrum with the road pilot frequency distribution, then the pectination frequency spectrum as Fig. 6 c is the residue pilot resources, then Fig. 6 c can give different user's transmission measurement pilot tones by direct all or part of frequency division, and residual resource is used for other purposes; Can be directly if the residue pilot resources directly has a plurality of pectination frequency spectrums will be wherein all or part of to different user's transmission measurement pilot tones, residual resource is used for other purposes; In addition, the pectination frequency spectrum shown in Fig. 6 c can also be continued to resolve into the pectination frequency spectrum of the sparse broach shown in 6d, 6e, 6f, the 6g, all or part of measurement pilot frequency that is used for, residual resource is as other purposes.
When the present invention has the symbol of a plurality of transmission of reference signals in the line time transmission unit on being applied to, have at least the symbol of a transmission of reference signals when carrying out the subcarrier mapping, to adopt the inventive method to get final product, other symbols can adopt mapping method or the sign indicating number branch pilot tone or other the method for prior art when carrying out the subcarrier mapping, also can all adopt the pilot frequency mapping method among the present invention.
System distributes measurement pilot frequency for the user of non-transmission data, and after notifying the user to send measurement pilot frequency, and the time domain that this user promptly notifies simultaneously according to the rule of predefined time domain and/or frequency domain or by system and/or the rule of frequency domain are carried out the pilot tone mapping.If a user should send measurement pilot frequency in unit of current transmission time according to set transmission rule, but send again with the road pilot tone owing to being scheduled for the transmission data, this user stops to send measurement pilot frequency so; Perhaps, stopped to send measurement pilot frequency because priority is low by notifications.In case a user stops to send in the measurement pilot frequency of some transmission units, so original rule lost efficacy.Time domain rule wherein is meant that the user sends the cycle of measurement pilot frequency, sends once as per three time transmission units; And the frequency domain rule is meant system is the frequency domain position rule of user's measurement pilot frequency of distributing, and for example, the user sends measurement pilot frequency in the mode of frequency hopping.
If user send in unit of current transmission time data its with the road pilot tone not and the set transmission rule of measurement pilot frequency conflict, promptly this user transmission with moment of road pilot tone according to the time domain rule of predetermined transmission measurement pilot frequency not needs send measurement pilot frequency, then this user continues to send measurement pilot frequency with its predetermined time domain rule.If conflict has taken place in its set transmission rule with road pilot tone and measurement pilot frequency of the moment of transmission data in this user, promptly this user in moment of transmission data owing to send with the road pilot tone time domain rule that can not send measurement pilot frequency thereby destroy original measurement pilot frequency at synchronization, if this user is scheduled at next time transmission unit, then continue the transmission data, and with pilot tone be mapped to into in the special-purpose pectination frequency spectrum of road pilot frequency distribution on should the partial-band of user data; Otherwise, if this user is not scheduled at next time transmission unit, then system distributes the spectrum position of measurement pilot frequency according to user's priority for the user, and the user is again according to time domain and/or the frequency domain rule transmission measurement pilot frequency of this spectrum position information with predefined time domain and/or frequency domain rule or notifications.
Specifically for the user distributes the method for measurement pilot frequency spectrum position be, if user's priority height then distributes the spectrum position of measurement pilot frequency for the user, if user's priority is hanged down then do not distributed the spectrum position of measurement pilot frequency for the user according to priority.The measurement pilot frequency spectrum position information that to distribute for the user if system has distributed the spectrum position of measurement pilot frequency for this user, or the time domain and/or the frequency domain rule information of the transmission measurement pilot frequency of further system being set for this user send to corresponding user; This user is according to this spectrum position information, or further pilot tone is mapped on the corresponding frequency spectrum resource and sends as measurement pilot frequency according to the time domain of the time domain of predefined transmission measurement pilot frequency and/or frequency domain rule or notifications and/or frequency domain rule, stop to send measurement pilot frequency up to conflicting with the set transmission rule of measurement pilot frequency once more of this user with the road pilot tone, or till the user stopped to send measurement pilot frequency by notifications.
After the transfer of data of current time transmission unit is finished, if should the time transmission unit transmission data the user each frequency band channel condition information still all effectively, such as: be within correlation time, then system still dispatches this user in full range; If have only the channel condition information of partial-band effective, then system dispatches on the frequency band in this section to this user.
There is the problem of conflicting in the set transmission rule with road pilot tone and measurement pilot frequency for above-mentioned certain user, can also adopt following way to solve: system is in normal transmission course, time transmission unit of periodic allocation, this time transmission unit are used to the user who clashes with road pilot tone and the set transmission rule of measurement pilot frequency to send measurement pilot frequency.Concrete grammar can for: system can the user with road pilot tone and the set transmission rule conflict of measurement pilot frequency after, when in these users' measuring period, not distributing the measurement pilot frequency resource, in the cycle time transmission unit, be measurement pilot frequency resource in these user's assignment period time transmission units according to these users' priority for this user.
System can not remain under the situation of measurement pilot frequency resource in the transmission unit in cycle time, the priority of distributing the measurement pilot frequency resource user is as required distributed for these need distribute the user of measurement pilot frequency resource to carry out measurement pilot frequency at transmission unit cycle time.
The mapping method of the measurement pilot frequency in the time transmission unit in above-mentioned cycle can be different with previously described measurement pilot frequency mapping method: the measurement pilot frequency of the pectination spectrum frequency division that can adopt, also can adopt sign indicating number branch measurement pilot frequency.
Specifically can be undertaken by the base station in the system during above-mentioned distribution frequency spectrum resource, the user is specifically carried out by this user's corresponding user terminal when carrying out the pilot tone mapping.
Then the present invention also provides a kind of wireless communication system, and this system comprises base station and user terminal, and wherein, the base station is used to carry out resource allocation, is included as the special-purpose pectination frequency spectrum with the road pilot frequency distribution, and should send to user terminal etc. by special use pectination spectrum information.User terminal is used for according to described special-purpose pectination spectrum information from the base station, pilot tone is mapped to described on the frequency band corresponding with this user data in the special-purpose pectination frequency spectrum with the road pilot frequency distribution, as transmitting with the road pilot tone of this user.Can comprise resource distribution module and sending module in the base station, wherein resource distribution module is used to the special-purpose pectination frequency spectrum of road pilot frequency distribution, and the special-purpose pectination spectrum information that will distribute sends to sending module; Sending module is used for the information from resource distribution module is sent to corresponding user terminal.The user that partly or entirely distributes to that described resource distribution module further can be used for the residual spectrum that special-purpose pectination frequency spectrum described in the pilot resources is outer is used for the transmission measurement pilot tone, or all distribute to the user and be used to transmit other outer information of pilot tone, and will send to sending module for the spectrum position information that the user distributes; Then described user terminal is further used for according to the spectrum information that receives the signal map of correspondence being transmitted to corresponding frequency spectrum resource.
Because find that through emulation testing the user is when measuring, the bandwidth of 5M is enough, so preferably, the shared maximum band scope of above-mentioned measurement pilot frequency can be 5M, after carrying out frequency division, also can take the frequency band range of 2.5M or 1.25M.
More than be explanation, in concrete implementation process, can carry out suitable improvement, to adapt to the concrete needs of concrete condition method of the present invention to the specific embodiment of the invention.Therefore be appreciated that according to the specific embodiment of the present invention just to play an exemplary role, not in order to restriction protection scope of the present invention.
Claims (20)
1, a kind of pilot frequency mapping method is characterized in that, this method comprises:
A, be with the special-purpose pectination frequency spectrum of road pilot frequency distribution, described for comprising with the special-purpose pectination frequency spectrum of road pilot frequency distribution: in predefined mode for the special-purpose pectination frequency spectrum of road pilot frequency distribution; Or by system according to be with the frequency domain resource density of road pilot tone needs with the special-purpose pectination frequency spectrum of road pilot frequency distribution, and the spectrum information of distribution is handed down to the user;
Described special-purpose pectination frequency spectrum accounts for the 1/N of continuous pilot subcarrier, and wherein N is the positive integer greater than 1;
Describedly be used to the pilot tone that up coherent demodulation or coherent detection are made channel estimating with the road pilot tone;
The user of B, transmission data is mapped to pilot tone described on the frequency band corresponding with this user's data in the special-purpose pectination frequency spectrum with the road pilot frequency distribution, as transmitting with the road pilot tone of this user.
2, method according to claim 1, it is characterized in that, this method further comprises: the user that partly or entirely distributes in system's residual spectrum that special-purpose pectination frequency spectrum described in the pilot resources is outer is used for the transmission measurement pilot tone, or all distributes to the user and be used to transmit other outer information of pilot tone.
3, method according to claim 1 and 2 is characterized in that, the user of described transmission data only is mapped to pilot tone transmitting with the road pilot tone as this user on the described frequency band corresponding with this user data when carrying out transfer of data current.
4, method according to claim 2 is characterized in that, the part or all of spectrum allocation may in the described residual spectrum is used for the transmission measurement pilot tone to the user be:
At least 1 pectination spectrum allocation may in a plurality of pectination frequency spectrums of described residual spectrum is used for the transmission measurement pilot tone to the user;
Perhaps described residual spectrum is further resolved into the more sparse pectination frequency spectrum of a plurality of broach, and wherein at least 1 pectination spectrum allocation may is used for the transmission measurement pilot tone to the user.
5, method according to claim 1 is characterized in that, and is described for the special-purpose pectination frequency spectrum of road pilot frequency distribution being: for user in the sub-district with the special-purpose pectination frequency spectrum of road pilot frequency distribution; System is that the described special-purpose pectination spectrum position of different districts distribution is identical or different.
6, method according to claim 5 is characterized in that, the described described special-purpose pectination spectrum position that distributes for different districts is not all:
Described special-purpose pectination spectrum position difference for neighbor cell allocation.
7, method according to claim 2, it is characterized in that, be assigned with frequency spectrum and be used for the user of the user of transmission measurement pilot tone for current non-transmission data, the time domain that the user of described non-transmission data is provided with for this user according to predefined time domain and/or frequency domain rule or system and/or the rule of frequency domain are mapped to pilot tone on the frequency spectrum for this user's distribution to be transmitted as measurement pilot frequency.
According to claim 1 or 7 described methods, it is characterized in that 8, after the user of described transmission data finished transfer of data, if the channel condition information of all or part of frequency band that this user's measurement pilot frequency provides is still effective, then system dispatched this user.
9, according to claim 1 or 7 described methods, it is characterized in that, if the user of described transmission data is when carrying out transfer of data, it has taken place to conflict then with the road pilot tone and the set transmission rule of measurement pilot frequency, and this user of current time only sends with the road pilot tone, stop to send measurement pilot frequency, the transmission rule of original measurement pilot frequency lost efficacy; After finishing transfer of data, the channel condition information that system determines this user's measurement pilot frequency to be provided lost efficacy, or the user participates in not being scheduled for after the scheduling of transfer of data, then system distributes the spectrum position of measurement pilot frequency according to user's priority for the user, and the spectrum position information of the measurement pilot frequency that will distribute for this user sends to the user; The user is according to the positional information transmission measurement pilot tone of the measurement pilot frequency that receives then.
10, method according to claim 9 is characterized in that, further carries out according to the time domain and/or the frequency domain rule of predefined transmission measurement pilot frequency during described user's transmission measurement pilot tone.
11, method according to claim 9, it is characterized in that, when described system distributes the spectrum position of measurement pilot frequency according to user's priority for the user, further comprise:, and will send to the user for time domain and/or the frequency domain rule that the user determines for the user determines to send the time domain and/or the frequency domain rule of measurement pilot frequency;
Described user is during according to the spectrum position message transmission measurement pilot frequency of the measurement pilot frequency of distributing, and further comprise: the user carries out the transmission of measurement pilot frequency according to time domain and/or frequency domain rule that system sends.
12, method according to claim 1, it is characterized in that, when comprising the symbol of an above transmission of reference signals in the last line time transmission unit of system, have at least the symbol of a transmission of reference signals to adopt described method to shine upon in this time transmission unit.
13, according to claim 1 or 7 described methods, it is characterized in that this method further comprises:
System preestablishes the time transmission unit that the user who is used to the set transmission rule with road pilot tone and measurement pilot frequency to clash sends measurement pilot frequency;
System distributes to the described user who clashes with the set transmission rule of road pilot tone and measurement pilot frequency with pilot resources, and will send to the user for the measurement pilot frequency resource information that the user distributes being described time transmission unit when distributing the measurement pilot frequency resource;
The user is mapped to pilot signal according to the measurement pilot frequency information that receives on the pilot resources of described time transmission unit transmits as this user's measurement pilot frequency.
14, method according to claim 13, it is characterized in that, the described user who clashes with the set transmission rule of road pilot tone and measurement pilot frequency is: when the measurement pilot frequency resource of the described time transmission unit of system assignment, system clashes the user that the back does not have to distribute for it measurement pilot frequency resource at it with road pilot tone and measurement pilot frequency.
15, method according to claim 13, system are described time transmission unit when distributing the measurement pilot frequency resource, are that described user distributes the measurement pilot frequency resource according to described user's priority.
16, method according to claim 13 is characterized in that, the transmission means of the measurement pilot frequency in the described time transmission unit is pectination spectrum frequency division form or sign indicating number branch form.
17, method according to claim 13 is characterized in that, described time transmission unit periodically is provided with.
18, a kind of wireless communication system is characterized in that, this system comprises:
The base station be used to the special-purpose pectination frequency spectrum of road pilot frequency distribution, and the special-purpose pectination spectrum information that will distribute sends to user terminal;
User terminal, be used for according to special-purpose pectination spectrum information from the base station, pilot tone is mapped to on the corresponding frequency band of user's data corresponding with this user terminal in the special-purpose pectination frequency spectrum with the road pilot frequency distribution, as transmitting of the user of this user terminal correspondence with the road pilot tone;
Described special-purpose pectination frequency spectrum accounts for the 1/N of continuous pilot subcarrier, and wherein N is the positive integer greater than 1;
Describedly be used to the pilot tone that up coherent demodulation or coherent detection are made channel estimating with the road pilot tone.
19, system according to claim 18 is characterized in that, comprises in the described base station:
Resource distribution module be used to the special-purpose pectination frequency spectrum of road pilot frequency distribution, and the special-purpose pectination spectrum information that will distribute sends to sending module;
Sending module is used for the information from resource distribution module is sent to corresponding user terminal.
20, system according to claim 19, it is characterized in that, the user that partly or entirely distributes to that described resource distribution module is further used in the residual spectrum that special-purpose pectination frequency spectrum described in the pilot resources is outer is used for the transmission measurement pilot tone, or all distribute to the user and be used to transmit other outer information of pilot tone, and will send to sending module for the spectrum position information that the user distributes;
Described user terminal is further used for according to the spectrum position information that receives the signal map of correspondence being transmitted to corresponding frequency spectrum resource.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100014809A CN100563143C (en) | 2006-01-19 | 2006-01-19 | A kind of pilot frequency mapping method and wireless communication system |
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| CNB2006100014809A CN100563143C (en) | 2006-01-19 | 2006-01-19 | A kind of pilot frequency mapping method and wireless communication system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2014169489A1 (en) * | 2013-04-19 | 2014-10-23 | 富士通株式会社 | Pilot resource configuration method, pilot resource allocation method and apparatus thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101364832B (en) * | 2007-08-08 | 2012-09-05 | 中兴通讯股份有限公司 | Adaptive switching method between spatial division multiplexing and code division multiplexing |
| KR101273596B1 (en) | 2008-12-03 | 2013-06-11 | 노키아 지멘스 네트웍스 오와이 | Method and communication network element for transmitting reference signals |
| CN107294673B (en) * | 2016-03-31 | 2020-05-15 | 电信科学技术研究院 | Uplink transmission method and device |
| CN107294674B (en) | 2016-03-31 | 2020-11-06 | 电信科学技术研究院 | Transmission method, device and system |
| CN107370586B (en) * | 2016-05-13 | 2021-02-05 | 电信科学技术研究院 | Channel transmission method and device |
| CN108282281B (en) * | 2017-01-05 | 2020-02-21 | 中国移动通信有限公司研究院 | Signal configuration method and device |
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| WO2014169489A1 (en) * | 2013-04-19 | 2014-10-23 | 富士通株式会社 | Pilot resource configuration method, pilot resource allocation method and apparatus thereof |
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